org.eclipse.swt.widgets.Shell.java Source code

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/*******************************************************************************
 * Copyright (c) 2000, 2018 IBM Corporation and others.
 *
 * This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License 2.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.swt.widgets;

import org.eclipse.swt.*;
import org.eclipse.swt.events.*;
import org.eclipse.swt.graphics.*;
import org.eclipse.swt.internal.*;
import org.eclipse.swt.internal.cairo.*;
import org.eclipse.swt.internal.gtk.*;

/**
 * Instances of this class represent the "windows"
 * which the desktop or "window manager" is managing.
 * Instances that do not have a parent (that is, they
 * are built using the constructor, which takes a
 * <code>Display</code> as the argument) are described
 * as <em>top level</em> shells. Instances that do have
 * a parent are described as <em>secondary</em> or
 * <em>dialog</em> shells.
 * <p>
 * Instances are always displayed in one of the maximized,
 * minimized or normal states:</p>
 * <ul>
 * <li>
 * When an instance is marked as <em>maximized</em>, the
 * window manager will typically resize it to fill the
 * entire visible area of the display, and the instance
 * is usually put in a state where it can not be resized
 * (even if it has style <code>RESIZE</code>) until it is
 * no longer maximized.
 * </li><li>
 * When an instance is in the <em>normal</em> state (neither
 * maximized or minimized), its appearance is controlled by
 * the style constants which were specified when it was created
 * and the restrictions of the window manager (see below).
 * </li><li>
 * When an instance has been marked as <em>minimized</em>,
 * its contents (client area) will usually not be visible,
 * and depending on the window manager, it may be
 * "iconified" (that is, replaced on the desktop by a small
 * simplified representation of itself), relocated to a
 * distinguished area of the screen, or hidden. Combinations
 * of these changes are also possible.
 * </li>
 * </ul>
 * <p>
 * The <em>modality</em> of an instance may be specified using
 * style bits. The modality style bits are used to determine
 * whether input is blocked for other shells on the display.
 * The <code>PRIMARY_MODAL</code> style allows an instance to block
 * input to its parent. The <code>APPLICATION_MODAL</code> style
 * allows an instance to block input to every other shell in the
 * display. The <code>SYSTEM_MODAL</code> style allows an instance
 * to block input to all shells, including shells belonging to
 * different applications.
 * </p><p>
 * Note: The styles supported by this class are treated
 * as <em>HINT</em>s, since the window manager for the
 * desktop on which the instance is visible has ultimate
 * control over the appearance and behavior of decorations
 * and modality. For example, some window managers only
 * support resizable windows and will always assume the
 * RESIZE style, even if it is not set. In addition, if a
 * modality style is not supported, it is "upgraded" to a
 * more restrictive modality style that is supported. For
 * example, if <code>PRIMARY_MODAL</code> is not supported,
 * it would be upgraded to <code>APPLICATION_MODAL</code>.
 * A modality style may also be "downgraded" to a less
 * restrictive style. For example, most operating systems
 * no longer support <code>SYSTEM_MODAL</code> because
 * it can freeze up the desktop, so this is typically
 * downgraded to <code>APPLICATION_MODAL</code>.</p>
 * <dl>
 * <dt><b>Styles:</b></dt>
 * <dd>BORDER, CLOSE, MIN, MAX, NO_MOVE, NO_TRIM, RESIZE, TITLE, ON_TOP, TOOL, SHEET</dd>
 * <dd>APPLICATION_MODAL, MODELESS, PRIMARY_MODAL, SYSTEM_MODAL</dd>
 * <dt><b>Events:</b></dt>
 * <dd>Activate, Close, Deactivate, Deiconify, Iconify</dd>
 * </dl>
 * <p>
 * Class <code>SWT</code> provides two "convenience constants"
 * for the most commonly required style combinations:</p>
 * <dl>
 * <dt><code>SHELL_TRIM</code></dt>
 * <dd>
 * the result of combining the constants which are required
 * to produce a typical application top level shell: (that
 * is, <code>CLOSE | TITLE | MIN | MAX | RESIZE</code>)
 * </dd>
 * <dt><code>DIALOG_TRIM</code></dt>
 * <dd>
 * the result of combining the constants which are required
 * to produce a typical application dialog shell: (that
 * is, <code>TITLE | CLOSE | BORDER</code>)
 * </dd>
 * </dl>
 * <p>
 * Note: Only one of the styles APPLICATION_MODAL, MODELESS,
 * PRIMARY_MODAL and SYSTEM_MODAL may be specified.
 * </p><p>
 * IMPORTANT: This class is <em>not</em> intended to be subclassed.
 * </p>
 *
 * @see Decorations
 * @see SWT
 * @see <a href="http://www.eclipse.org/swt/snippets/#shell">Shell snippets</a>
 * @see <a href="http://www.eclipse.org/swt/examples.php">SWT Example: ControlExample</a>
 * @see <a href="http://www.eclipse.org/swt/">Sample code and further information</a>
 * @noextend This class is not intended to be subclassed by clients.
 */
public class Shell extends Decorations {
    long shellHandle, tooltipsHandle, tooltipWindow, group, modalGroup;
    boolean mapped, moved, resized, opened, fullScreen, showWithParent, modified, center;
    int oldX, oldY, oldWidth, oldHeight;
    int minWidth, minHeight;
    Control lastActive;
    ToolTip[] toolTips;
    boolean ignoreFocusOut, ignoreFocusIn;
    boolean ignoreFocusOutAfterGrab, grabbedFocus;
    Region originalRegion;

    static final int MAXIMUM_TRIM = 128;
    static final int BORDER = 3;

    /**
     * Constructs a new instance of this class. This is equivalent
     * to calling <code>Shell((Display) null)</code>.
     *
     * @exception SWTException <ul>
     *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent</li>
     *    <li>ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass</li>
     * </ul>
     */
    public Shell() {
        this((Display) null);
    }

    /**
     * Constructs a new instance of this class given only the style
     * value describing its behavior and appearance. This is equivalent
     * to calling <code>Shell((Display) null, style)</code>.
     * <p>
     * The style value is either one of the style constants defined in
     * class <code>SWT</code> which is applicable to instances of this
     * class, or must be built by <em>bitwise OR</em>'ing together
     * (that is, using the <code>int</code> "|" operator) two or more
     * of those <code>SWT</code> style constants. The class description
     * lists the style constants that are applicable to the class.
     * Style bits are also inherited from superclasses.
     * </p>
     *
     * @param style the style of control to construct
     *
     * @exception SWTException <ul>
     *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent</li>
     *    <li>ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass</li>
     * </ul>
     *
     * @see SWT#BORDER
     * @see SWT#CLOSE
     * @see SWT#MIN
     * @see SWT#MAX
     * @see SWT#RESIZE
     * @see SWT#TITLE
     * @see SWT#TOOL
     * @see SWT#NO_TRIM
     * @see SWT#NO_MOVE
     * @see SWT#SHELL_TRIM
     * @see SWT#DIALOG_TRIM
     * @see SWT#ON_TOP
     * @see SWT#MODELESS
     * @see SWT#PRIMARY_MODAL
     * @see SWT#APPLICATION_MODAL
     * @see SWT#SYSTEM_MODAL
     * @see SWT#SHEET
     */
    public Shell(int style) {
        this((Display) null, style);
    }

    /**
     * Constructs a new instance of this class given only the display
     * to create it on. It is created with style <code>SWT.SHELL_TRIM</code>.
     * <p>
     * Note: Currently, null can be passed in for the display argument.
     * This has the effect of creating the shell on the currently active
     * display if there is one. If there is no current display, the
     * shell is created on a "default" display. <b>Passing in null as
     * the display argument is not considered to be good coding style,
     * and may not be supported in a future release of SWT.</b>
     * </p>
     *
     * @param display the display to create the shell on
     *
     * @exception SWTException <ul>
     *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent</li>
     *    <li>ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass</li>
     * </ul>
     */
    public Shell(Display display) {
        this(display, SWT.SHELL_TRIM);
    }

    /**
     * Constructs a new instance of this class given the display
     * to create it on and a style value describing its behavior
     * and appearance.
     * <p>
     * The style value is either one of the style constants defined in
     * class <code>SWT</code> which is applicable to instances of this
     * class, or must be built by <em>bitwise OR</em>'ing together
     * (that is, using the <code>int</code> "|" operator) two or more
     * of those <code>SWT</code> style constants. The class description
     * lists the style constants that are applicable to the class.
     * Style bits are also inherited from superclasses.
     * </p><p>
     * Note: Currently, null can be passed in for the display argument.
     * This has the effect of creating the shell on the currently active
     * display if there is one. If there is no current display, the
     * shell is created on a "default" display. <b>Passing in null as
     * the display argument is not considered to be good coding style,
     * and may not be supported in a future release of SWT.</b>
     * </p>
     *
     * @param display the display to create the shell on
     * @param style the style of control to construct
     *
     * @exception SWTException <ul>
     *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent</li>
     *    <li>ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass</li>
     * </ul>
     *
     * @see SWT#BORDER
     * @see SWT#CLOSE
     * @see SWT#MIN
     * @see SWT#MAX
     * @see SWT#RESIZE
     * @see SWT#TITLE
     * @see SWT#TOOL
     * @see SWT#NO_TRIM
     * @see SWT#NO_MOVE
     * @see SWT#SHELL_TRIM
     * @see SWT#DIALOG_TRIM
     * @see SWT#ON_TOP
     * @see SWT#MODELESS
     * @see SWT#PRIMARY_MODAL
     * @see SWT#APPLICATION_MODAL
     * @see SWT#SYSTEM_MODAL
     * @see SWT#SHEET
     */
    public Shell(Display display, int style) {
        this(display, null, style, 0, false);
    }

    Shell(Display display, Shell parent, int style, long handle, boolean embedded) {
        super();
        checkSubclass();
        if (display == null)
            display = Display.getCurrent();
        if (display == null)
            display = Display.getDefault();
        if (!display.isValidThread()) {
            error(SWT.ERROR_THREAD_INVALID_ACCESS);
        }
        if (parent != null && parent.isDisposed()) {
            error(SWT.ERROR_INVALID_ARGUMENT);
        }
        this.center = parent != null && (style & SWT.SHEET) != 0;
        this.style = checkStyle(parent, style);
        this.parent = parent;
        this.display = display;
        if (handle != 0) {
            if (embedded) {
                this.handle = handle;
            } else {
                shellHandle = handle;
                state |= FOREIGN_HANDLE;
            }
        }
        reskinWidget();
        createWidget(0);
    }

    /**
     * Constructs a new instance of this class given only its
     * parent. It is created with style <code>SWT.DIALOG_TRIM</code>.
     * <p>
     * Note: Currently, null can be passed in for the parent.
     * This has the effect of creating the shell on the currently active
     * display if there is one. If there is no current display, the
     * shell is created on a "default" display. <b>Passing in null as
     * the parent is not considered to be good coding style,
     * and may not be supported in a future release of SWT.</b>
     * </p>
     *
     * @param parent a shell which will be the parent of the new instance
     *
     * @exception IllegalArgumentException <ul>
     *    <li>ERROR_INVALID_ARGUMENT - if the parent is disposed</li>
     * </ul>
     * @exception SWTException <ul>
     *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent</li>
     *    <li>ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass</li>
     * </ul>
     */
    public Shell(Shell parent) {
        this(parent, SWT.DIALOG_TRIM);
    }

    /**
     * Constructs a new instance of this class given its parent
     * and a style value describing its behavior and appearance.
     * <p>
     * The style value is either one of the style constants defined in
     * class <code>SWT</code> which is applicable to instances of this
     * class, or must be built by <em>bitwise OR</em>'ing together
     * (that is, using the <code>int</code> "|" operator) two or more
     * of those <code>SWT</code> style constants. The class description
     * lists the style constants that are applicable to the class.
     * Style bits are also inherited from superclasses.
     * </p><p>
     * Note: Currently, null can be passed in for the parent.
     * This has the effect of creating the shell on the currently active
     * display if there is one. If there is no current display, the
     * shell is created on a "default" display. <b>Passing in null as
     * the parent is not considered to be good coding style,
     * and may not be supported in a future release of SWT.</b>
     * </p>
     *
     * @param parent a shell which will be the parent of the new instance
     * @param style the style of control to construct
     *
     * @exception IllegalArgumentException <ul>
     *    <li>ERROR_INVALID_ARGUMENT - if the parent is disposed</li>
     * </ul>
     * @exception SWTException <ul>
     *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent</li>
     *    <li>ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass</li>
     * </ul>
     *
     * @see SWT#BORDER
     * @see SWT#CLOSE
     * @see SWT#MIN
     * @see SWT#MAX
     * @see SWT#RESIZE
     * @see SWT#TITLE
     * @see SWT#NO_TRIM
     * @see SWT#NO_MOVE
     * @see SWT#SHELL_TRIM
     * @see SWT#DIALOG_TRIM
     * @see SWT#ON_TOP
     * @see SWT#TOOL
     * @see SWT#MODELESS
     * @see SWT#PRIMARY_MODAL
     * @see SWT#APPLICATION_MODAL
     * @see SWT#SYSTEM_MODAL
     * @see SWT#SHEET
     */
    public Shell(Shell parent, int style) {
        this(parent != null ? parent.display : null, parent, style, 0, false);
    }

    /**
     * Invokes platform specific functionality to allocate a new shell
     * that is embedded.
     * <p>
     * <b>IMPORTANT:</b> This method is <em>not</em> part of the public
     * API for <code>Shell</code>. It is marked public only so that it
     * can be shared within the packages provided by SWT. It is not
     * available on all platforms, and should never be called from
     * application code.
     * </p>
     *
     * @param display the display for the shell
     * @param handle the handle for the shell
     * @return a new shell object containing the specified display and handle
     *
     * @noreference This method is not intended to be referenced by clients.
     */
    public static Shell gtk_new(Display display, long handle) {
        return new Shell(display, null, SWT.NO_TRIM, handle, true);
    }

    /**
     * Invokes platform specific functionality to allocate a new shell
     * that is not embedded.
     * <p>
     * <b>IMPORTANT:</b> This method is <em>not</em> part of the public
     * API for <code>Shell</code>. It is marked public only so that it
     * can be shared within the packages provided by SWT. It is not
     * available on all platforms, and should never be called from
     * application code.
     * </p>
     *
     * @param display the display for the shell
     * @param handle the handle for the shell
     * @return a new shell object containing the specified display and handle
     *
     * @noreference This method is not intended to be referenced by clients.
     *
     * @since 3.3
     */
    public static Shell internal_new(Display display, long handle) {
        return new Shell(display, null, SWT.NO_TRIM, handle, false);
    }

    static int checkStyle(Shell parent, int style) {
        style = Decorations.checkStyle(style);
        style &= ~SWT.TRANSPARENT;
        if (parent != null && (style & SWT.ON_TOP) != 0)
            style &= ~(SWT.CLOSE | SWT.TITLE | SWT.MIN | SWT.MAX);
        int mask = SWT.SYSTEM_MODAL | SWT.APPLICATION_MODAL | SWT.PRIMARY_MODAL;
        if ((style & SWT.SHEET) != 0) {
            style &= ~SWT.SHEET;
            style |= parent == null ? SWT.SHELL_TRIM : SWT.DIALOG_TRIM;
            if ((style & mask) == 0) {
                style |= parent == null ? SWT.APPLICATION_MODAL : SWT.PRIMARY_MODAL;
            }
        }
        int bits = style & ~mask;
        if ((style & SWT.SYSTEM_MODAL) != 0)
            return bits | SWT.SYSTEM_MODAL;
        if ((style & SWT.APPLICATION_MODAL) != 0)
            return bits | SWT.APPLICATION_MODAL;
        if ((style & SWT.PRIMARY_MODAL) != 0)
            return bits | SWT.PRIMARY_MODAL;
        return bits;
    }

    /**
     * Adds the listener to the collection of listeners who will
     * be notified when operations are performed on the receiver,
     * by sending the listener one of the messages defined in the
     * <code>ShellListener</code> interface.
     *
     * @param listener the listener which should be notified
     *
     * @exception IllegalArgumentException <ul>
     *    <li>ERROR_NULL_ARGUMENT - if the listener is null</li>
     * </ul>
     * @exception SWTException <ul>
     *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
     *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
     * </ul>
     *
     * @see ShellListener
     * @see #removeShellListener
     */
    public void addShellListener(ShellListener listener) {
        checkWidget();
        if (listener == null)
            error(SWT.ERROR_NULL_ARGUMENT);
        TypedListener typedListener = new TypedListener(listener);
        addListener(SWT.Close, typedListener);
        addListener(SWT.Iconify, typedListener);
        addListener(SWT.Deiconify, typedListener);
        addListener(SWT.Activate, typedListener);
        addListener(SWT.Deactivate, typedListener);
    }

    void addToolTip(ToolTip toolTip) {
        if (toolTips == null)
            toolTips = new ToolTip[4];
        for (int i = 0; i < toolTips.length; i++) {
            if (toolTips[i] == null) {
                toolTips[i] = toolTip;
                return;
            }
        }
        ToolTip[] newToolTips = new ToolTip[toolTips.length + 4];
        newToolTips[toolTips.length] = toolTip;
        System.arraycopy(toolTips, 0, newToolTips, 0, toolTips.length);
        toolTips = newToolTips;
    }

    void adjustTrim() {
        if (display.ignoreTrim)
            return;
        GtkAllocation allocation = new GtkAllocation();
        GTK.gtk_widget_get_allocation(shellHandle, allocation);
        int width = allocation.width;
        int height = allocation.height;
        GdkRectangle rect = new GdkRectangle();
        if (GTK.GTK4) {
            long surface = gtk_widget_get_surface(shellHandle);
            GDK.gdk_surface_get_frame_extents(surface, rect);
        } else {
            long window = gtk_widget_get_window(shellHandle);
            GDK.gdk_window_get_frame_extents(window, rect);
        }
        int trimWidth = Math.max(0, rect.width - width);
        int trimHeight = Math.max(0, rect.height - height);
        /*
        * Bug in GTK.  gdk_window_get_frame_extents() fails for various window
        * managers, causing a large incorrect value to be returned as the trim.
        * The fix is to ignore the returned trim values if they are too large.
        *
        * Additionally, ignore trim for Shells with SWT.RESIZE and SWT.ON_TOP set.
        * See bug 319612.
        */
        if (trimWidth > MAXIMUM_TRIM || trimHeight > MAXIMUM_TRIM || isCustomResize()) {
            display.ignoreTrim = true;
            return;
        }
        boolean hasTitle = false, hasResize = false, hasBorder = false;
        if ((style & SWT.NO_TRIM) == 0) {
            hasTitle = (style & (SWT.MIN | SWT.MAX | SWT.TITLE | SWT.MENU)) != 0;
            hasResize = (style & SWT.RESIZE) != 0;
            hasBorder = (style & SWT.BORDER) != 0;
        }
        int trimStyle;
        if (hasTitle) {
            if (hasResize) {
                trimStyle = Display.TRIM_TITLE_RESIZE;
            } else if (hasBorder) {
                trimStyle = Display.TRIM_TITLE_BORDER;
            } else {
                trimStyle = Display.TRIM_TITLE;
            }
        } else if (hasResize) {
            trimStyle = Display.TRIM_RESIZE;
        } else if (hasBorder) {
            trimStyle = Display.TRIM_BORDER;
        } else {
            trimStyle = Display.TRIM_NONE;
        }
        /*
         * The workaround for bug 445900 seems to cause problems for some
         * users on GTK2, see bug 492695. The fix is to only adjust the
         * shell size on GTK3.
         */
        Rectangle bounds = getBoundsInPixels();
        int widthAdjustment = display.trimWidths[trimStyle] - trimWidth;
        int heightAdjustment = display.trimHeights[trimStyle] - trimHeight;
        if (widthAdjustment == 0 && heightAdjustment == 0)
            return;

        bounds.width += widthAdjustment;
        bounds.height += heightAdjustment;
        oldWidth += widthAdjustment;
        oldHeight += heightAdjustment;
        if (!getMaximized()) {
            resizeBounds(width + widthAdjustment, height + heightAdjustment, false);
        }
        display.trimWidths[trimStyle] = trimWidth;
        display.trimHeights[trimStyle] = trimHeight;
    }

    void bringToTop(boolean force) {
        if (!GTK.gtk_widget_get_visible(shellHandle))
            return;
        Display display = this.display;
        Shell activeShell = display.activeShell;
        if (activeShell == this)
            return;
        if (!force) {
            if (activeShell == null)
                return;
            if (!display.activePending) {
                long focusHandle = GTK.gtk_window_get_focus(activeShell.shellHandle);
                if (focusHandle != 0 && !GTK.gtk_widget_has_focus(focusHandle))
                    return;
            }
        }
        /*
        * Bug in GTK.  When a shell that is not managed by the window
        * manage is given focus, GTK gets stuck in "focus follows pointer"
        * mode when the pointer is within the shell and its parent when
        * the shell is hidden or disposed. The fix is to use XSetInputFocus()
        * to assign focus when ever the active shell has not managed by
        * the window manager.
        *
        * NOTE: This bug is fixed in GTK+ 2.6.8 and above.
        */
        boolean xFocus = false;
        if (activeShell != null) {
            display.activeShell = null;
            display.activePending = true;
        }
        /*
        * Feature in GTK.  When the shell is an override redirect
        * window, gdk_window_focus() does not give focus to the
        * window.  The fix is to use XSetInputFocus() to force
        * the focus, or gtk_grab_add() for GTK > 3.20.
        */
        long gdkResource;
        if (GTK.GTK4) {
            gdkResource = gtk_widget_get_surface(shellHandle);
        } else {
            gdkResource = gtk_widget_get_window(shellHandle);
        }
        if ((xFocus || (style & SWT.ON_TOP) != 0)) {
            if (OS.isX11()) {
                long gdkDisplay = GDK.gdk_window_get_display(gdkResource);
                long xDisplay = GDK.gdk_x11_display_get_xdisplay(gdkDisplay);
                long xWindow = GDK.gdk_x11_window_get_xid(gdkResource);
                GDK.gdk_x11_display_error_trap_push(gdkDisplay);
                /* Use CurrentTime instead of the last event time to ensure that the shell becomes active */
                OS.XSetInputFocus(xDisplay, xWindow, OS.RevertToParent, OS.CurrentTime);
                GDK.gdk_x11_display_error_trap_pop_ignored(gdkDisplay);
            } else {
                if (GTK.GTK_VERSION >= OS.VERSION(3, 20, 0)) {
                    GTK.gtk_grab_add(shellHandle);
                    long gdkDisplay;
                    if (GTK.GTK4) {
                        gdkDisplay = GDK.gdk_surface_get_display(gdkResource);
                    } else {
                        gdkDisplay = GDK.gdk_window_get_display(gdkResource);
                    }
                    long seat = GDK.gdk_display_get_default_seat(gdkDisplay);
                    if (GTK.GTK4) {
                        GDK.gdk_surface_show(gdkResource);
                    } else {
                        GDK.gdk_window_show(gdkResource);
                    }
                    GDK.gdk_seat_grab(seat, gdkResource, GDK.GDK_SEAT_CAPABILITY_ALL, true, 0, 0, 0, 0);
                    /*
                     * Bug 541185: Hover over to open Javadoc popup will make the popup
                     * close instead of gaining focus due to an extra focus out signal sent
                     * after grabbing focus. This triggers SWT.Deactivate handler which closes the shell.
                     * Workaround is to ignore this focus out.
                     */
                    grabbedFocus = true;
                    ignoreFocusOutAfterGrab = true;
                }
            }
        } else {
            if (GTK.GTK4) {
                GDK.gdk_surface_focus(gdkResource, GDK.GDK_CURRENT_TIME);
            } else {
                GDK.gdk_window_focus(gdkResource, GDK.GDK_CURRENT_TIME);
            }
        }
        display.activeShell = this;
        display.activePending = true;
    }

    void center() {
        if (parent == null)
            return;
        Rectangle rect = getBoundsInPixels();
        Rectangle parentRect = display.mapInPixels(parent, null, parent.getClientAreaInPixels());
        int x = Math.max(parentRect.x, parentRect.x + (parentRect.width - rect.width) / 2);
        int y = Math.max(parentRect.y, parentRect.y + (parentRect.height - rect.height) / 2);
        Rectangle monitorRect = DPIUtil.autoScaleUp(parent.getMonitor().getClientArea());
        if (x + rect.width > monitorRect.x + monitorRect.width) {
            x = Math.max(monitorRect.x, monitorRect.x + monitorRect.width - rect.width);
        } else {
            x = Math.max(x, monitorRect.x);
        }
        if (y + rect.height > monitorRect.y + monitorRect.height) {
            y = Math.max(monitorRect.y, monitorRect.y + monitorRect.height - rect.height);
        } else {
            y = Math.max(y, monitorRect.y);
        }
        setLocationInPixels(x, y);
    }

    @Override
    void checkBorder() {
        /* Do nothing */
    }

    @Override
    void checkOpen() {
        if (!opened)
            resized = false;
    }

    /**
     * Requests that the window manager close the receiver in
     * the same way it would be closed when the user clicks on
     * the "close box" or performs some other platform specific
     * key or mouse combination that indicates the window
     * should be removed.
     *
     * @exception SWTException <ul>
     *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
     *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
     * </ul>
     *
     * @see SWT#Close
     * @see #dispose
     */
    public void close() {
        checkWidget();
        closeWidget();
    }

    void closeWidget() {
        Event event = new Event();
        sendEvent(SWT.Close, event);
        if (event.doit && !isDisposed())
            dispose();
    }

    @Override
    Rectangle computeTrimInPixels(int x, int y, int width, int height) {
        checkWidget();
        Rectangle trim = super.computeTrimInPixels(x, y, width, height);
        int border = 0;
        if ((style & (SWT.NO_TRIM | SWT.BORDER | SWT.SHELL_TRIM)) == 0 || isCustomResize()) {
            border = gtk_container_get_border_width_or_margin(shellHandle);
        }
        int trimWidth = trimWidth(), trimHeight = trimHeight();
        trim.x -= (trimWidth / 2) + border;
        trim.y -= trimHeight - (trimWidth / 2) + border;
        trim.width += trimWidth + border * 2;
        trim.height += trimHeight + border * 2;
        if (menuBar != null) {
            forceResize();
            GtkAllocation allocation = new GtkAllocation();
            GTK.gtk_widget_get_allocation(menuBar.handle, allocation);
            int menuBarHeight = allocation.height;
            trim.y -= menuBarHeight;
            trim.height += menuBarHeight;
        }
        return trim;
    }

    @Override
    void createHandle(int index) {
        state |= HANDLE | CANVAS;
        if (shellHandle == 0) {
            if (handle == 0) {
                int type = GTK.GTK_WINDOW_TOPLEVEL;
                if (parent != null && (style & SWT.ON_TOP) != 0)
                    type = GTK.GTK_WINDOW_POPUP;
                shellHandle = GTK.gtk_window_new(type);
            } else {
                shellHandle = GTK.gtk_plug_new(handle);
            }
            if (shellHandle == 0)
                error(SWT.ERROR_NO_HANDLES);
            if (parent != null) {
                /*
                 * Problems with GTK_WINDOW_POPUP attached to another GTK_WINDOW_POPUP parent
                 * 1) Bug 530138: GTK_WINDOW_POPUP attached to a GTK_WINDOW_POPUP parent
                 * gets positioned relatively to the GTK_WINDOW_POPUP. We want to position it
                 * relatively to the GTK_WINDOW_TOPLEVEL surface. Fix is to set the child popup's transient
                 * parent to the top level window.
                 *
                 * 2) Bug 540166: When a parent popup is destroyed, the child popup sometimes does not
                 * get destroyed and is stuck until its transient top level parent gets destroyed.
                 * Fix is to implement a similar gtk_window_set_destroy_with_parent with its *logical*
                 * parent by connecting a "destroy" signal.
                 */
                if (!OS.isX11()) {
                    Composite topLevelParent = parent;
                    while (topLevelParent != null && (topLevelParent.style & SWT.ON_TOP) != 0) {
                        topLevelParent = parent.getParent();
                    }
                    // transient parent must be the a toplevel window to position correctly
                    if (topLevelParent != null) {
                        GTK.gtk_window_set_transient_for(shellHandle, topLevelParent.topHandle());
                    } else {
                        GTK.gtk_window_set_transient_for(shellHandle, parent.topHandle());
                    }
                    // this marks the logical parent
                    GTK.gtk_window_set_attached_to(shellHandle, parent.topHandle());
                    // implements the gtk_window_set_destroy_with_parent for the *logical* parent
                    if (parent != topLevelParent && isMappedToPopup()) {
                        parent.popupChild = this;
                    }
                } else {
                    GTK.gtk_window_set_transient_for(shellHandle, parent.topHandle());
                }
                GTK.gtk_window_set_destroy_with_parent(shellHandle, true);
                // if child shells are minimizable, we want them to have a
                // taskbar icon, so they can be unminimized
                if ((style & SWT.MIN) == 0) {
                    GTK.gtk_window_set_skip_taskbar_hint(shellHandle, true);
                }

                /*
                 * For systems running Metacity, by applying the dialog type hint
                 * to a window only the close button can be placed on the title bar.
                 * The style hints for the minimize and maximize buttons are ignored.
                 * See bug 445456.
                 *
                 */
                //         if (!isUndecorated ()) {
                //            OS.gtk_window_set_type_hint (shellHandle, OS.GDK_WINDOW_TYPE_HINT_DIALOG);
                //         }
            } else {
                if ((style & SWT.ON_TOP) != 0)
                    GTK.gtk_window_set_keep_above(shellHandle, true);
            }
            /*
            * Feature in GTK.  The window size must be set when the window
            * is created or it will not be allowed to be resized smaller that the
            * initial size by the user.  The fix is to set the size to zero.
            */
            if ((style & SWT.RESIZE) != 0) {
                GTK.gtk_widget_set_size_request(shellHandle, 0, 0);
                GTK.gtk_window_set_resizable(shellHandle, true);
            } else {
                GTK.gtk_window_set_resizable(shellHandle, false);
            }
            GTK.gtk_window_set_title(shellHandle, new byte[1]);
            if ((style & (SWT.NO_TRIM | SWT.BORDER | SWT.SHELL_TRIM)) == 0) {
                gtk_container_set_border_width(shellHandle, 1);
                if (GTK.GTK_VERSION < OS.VERSION(3, 14, 0)) {
                    GTK.gtk_widget_override_background_color(shellHandle, GTK.GTK_STATE_FLAG_NORMAL, new GdkRGBA());
                }
            }
            if ((style & SWT.TOOL) != 0) {
                GTK.gtk_window_set_type_hint(shellHandle, GDK.GDK_WINDOW_TYPE_HINT_UTILITY);
            }
            if ((style & SWT.NO_TRIM) != 0) {
                GTK.gtk_window_set_decorated(shellHandle, false);
            }
            /*
             * On Wayland, shells with no SHELL_TRIM style specified have decorations by default.
             * This fixes the issue that the open editor dialog (Ctrl+E) for Eclipse on Wayland
             * has a tile bar on top.
             */
            if (!OS.isX11() && (style & SWT.SHELL_TRIM) == 0) {
                GTK.gtk_window_set_decorated(shellHandle, false);
            }
            if (isCustomResize()) {
                gtk_container_set_border_width(shellHandle, BORDER);
            }
        }
        vboxHandle = gtk_box_new(GTK.GTK_ORIENTATION_VERTICAL, false, 0);
        if (vboxHandle == 0)
            error(SWT.ERROR_NO_HANDLES);
        createHandle(index, false, true);
        GTK.gtk_container_add(vboxHandle, scrolledHandle);
        gtk_box_set_child_packing(vboxHandle, scrolledHandle, true, true, 0, GTK.GTK_PACK_END);
        group = GTK.gtk_window_group_new();
        if (group == 0)
            error(SWT.ERROR_NO_HANDLES);
        /*
        * Feature in GTK.  Realizing the shell triggers a size allocate event,
        * which may be confused for a resize event from the window manager if
        * received too late.  The fix is to realize the window during creation
        * to avoid confusion.
        */
        GTK.gtk_widget_realize(shellHandle);
    }

    @Override
    long filterProc(long xEvent, long gdkEvent, long data2) {
        if (!OS.isX11())
            return 0;
        int eventType = OS.X_EVENT_TYPE(xEvent);
        if (eventType != OS.FocusOut && eventType != OS.FocusIn)
            return 0;
        XFocusChangeEvent xFocusEvent = new XFocusChangeEvent();
        OS.memmove(xFocusEvent, xEvent, XFocusChangeEvent.sizeof);
        switch (eventType) {
        case OS.FocusIn:
            if (xFocusEvent.mode == OS.NotifyNormal || xFocusEvent.mode == OS.NotifyWhileGrabbed) {
                switch (xFocusEvent.detail) {
                case OS.NotifyNonlinear:
                case OS.NotifyNonlinearVirtual:
                case OS.NotifyAncestor:
                    display.activeShell = this;
                    display.activePending = false;
                    sendEvent(SWT.Activate);
                    if (isDisposed())
                        return 0;
                    if (isCustomResize()) {
                        GDK.gdk_window_invalidate_rect(gtk_widget_get_window(shellHandle), null, false);
                    }
                    break;
                }
            }
            break;
        case OS.FocusOut:
            if (xFocusEvent.mode == OS.NotifyNormal || xFocusEvent.mode == OS.NotifyWhileGrabbed) {
                switch (xFocusEvent.detail) {
                case OS.NotifyNonlinear:
                case OS.NotifyNonlinearVirtual:
                case OS.NotifyVirtual:
                    Display display = this.display;
                    sendEvent(SWT.Deactivate);
                    setActiveControl(null);
                    if (display.activeShell == this) {
                        display.activeShell = null;
                        display.activePending = false;
                    }
                    if (isDisposed())
                        return 0;
                    if (isCustomResize()) {
                        GDK.gdk_window_invalidate_rect(gtk_widget_get_window(shellHandle), null, false);
                    }
                    break;
                }
            }
            break;
        }
        return 0;
    }

    @Override
    Control findBackgroundControl() {
        return (state & BACKGROUND) != 0 || backgroundImage != null ? this : null;
    }

    @Override
    Composite findDeferredControl() {
        return layoutCount > 0 ? this : null;
    }

    /**
     * Returns a ToolBar object representing the tool bar that can be shown in the receiver's
     * trim. This will return <code>null</code> if the platform does not support tool bars that
     * are not part of the content area of the shell, or if the Shell's style does not support
     * having a tool bar.
     * <p>
     *
     * @return a ToolBar object representing the Shell's tool bar, or <code>null</code>.
     *
     * @exception SWTException <ul>
     *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
     *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
     * </ul>
     *
     * @since 3.7
     */
    public ToolBar getToolBar() {
        checkWidget();
        return null;
    }

    @Override
    boolean hasBorder() {
        return false;
    }

    @Override
    void hookEvents() {
        super.hookEvents();
        if (GTK.GTK4) {
            // Replace configure-event, map-event with generic event handler
            if (eventHandle() == 0) {
                OS.g_signal_connect_closure_by_id(shellHandle, display.signalIds[EVENT], 0,
                        display.getClosure(EVENT), false);
            }
            // Replaced "window-state-event" with GdkSurface "notify::state", pass shellHandle as user_data
            long notifyStateAddress = display.notifyStateCallback.getAddress();
            GTK.gtk_widget_realize(shellHandle);
            long gdkSurface = gtk_widget_get_surface(shellHandle);
            OS.g_signal_connect(gdkSurface, OS.notify_state, notifyStateAddress, shellHandle);
            OS.g_signal_connect_closure_by_id(shellHandle, display.signalIds[SIZE_ALLOCATE_GTK4], 0,
                    display.getClosure(SIZE_ALLOCATE_GTK4), false);
        } else {
            OS.g_signal_connect_closure_by_id(shellHandle, display.signalIds[WINDOW_STATE_EVENT], 0,
                    display.getClosure(WINDOW_STATE_EVENT), false);
            OS.g_signal_connect_closure_by_id(shellHandle, display.signalIds[CONFIGURE_EVENT], 0,
                    display.getClosure(CONFIGURE_EVENT), false);
            OS.g_signal_connect_closure_by_id(shellHandle, display.signalIds[MAP_EVENT], 0,
                    display.shellMapProcClosure, false);
            OS.g_signal_connect_closure_by_id(shellHandle, display.signalIds[SIZE_ALLOCATE], 0,
                    display.getClosure(SIZE_ALLOCATE), false);
        }
        if (GTK.GTK4) {
            OS.g_signal_connect_closure(shellHandle, OS.close_request, display.getClosure(CLOSE_REQUEST), false);
            long keyController = GTK.gtk_event_controller_key_new();
            GTK.gtk_widget_add_controller(shellHandle, keyController);
            GTK.gtk_event_controller_set_propagation_phase(keyController, GTK.GTK_PHASE_TARGET);

            long keyPressReleaseAddress = display.keyPressReleaseCallback.getAddress();
            long focusAddress = display.focusCallback.getAddress();
            OS.g_signal_connect(keyController, OS.key_pressed, keyPressReleaseAddress, KEY_PRESSED);
            OS.g_signal_connect(keyController, OS.focus_in, focusAddress, FOCUS_IN);
            OS.g_signal_connect(keyController, OS.focus_out, focusAddress, FOCUS_OUT);

            long enterLeaveController = GTK.gtk_event_controller_motion_new();
            GTK.gtk_widget_add_controller(shellHandle, enterLeaveController);

            long enterMotionAddress = display.enterMotionScrollCallback.getAddress();
            OS.g_signal_connect(enterLeaveController, OS.enter, enterMotionAddress, ENTER);
            if (isCustomResize()) {
                long motionController = GTK.gtk_event_controller_motion_new();
                GTK.gtk_widget_add_controller(shellHandle, motionController);
                GTK.gtk_event_controller_set_propagation_phase(motionController, GTK.GTK_PHASE_TARGET);

                OS.g_signal_connect(motionController, OS.motion, enterMotionAddress, MOTION);
                long leaveAddress = display.leaveCallback.getAddress();
                OS.g_signal_connect(enterLeaveController, OS.leave, leaveAddress, LEAVE);
            }
        } else {
            OS.g_signal_connect_closure_by_id(shellHandle, display.signalIds[DELETE_EVENT], 0,
                    display.getClosure(DELETE_EVENT), false);
            OS.g_signal_connect_closure_by_id(shellHandle, display.signalIds[KEY_PRESS_EVENT], 0,
                    display.getClosure(KEY_PRESS_EVENT), false);
            OS.g_signal_connect_closure_by_id(shellHandle, display.signalIds[FOCUS_IN_EVENT], 0,
                    display.getClosure(FOCUS_IN_EVENT), false);
            OS.g_signal_connect_closure_by_id(shellHandle, display.signalIds[FOCUS_OUT_EVENT], 0,
                    display.getClosure(FOCUS_OUT_EVENT), false);
            OS.g_signal_connect_closure_by_id(shellHandle, display.signalIds[ENTER_NOTIFY_EVENT], 0,
                    display.getClosure(ENTER_NOTIFY_EVENT), false);
        }
        OS.g_signal_connect_closure(shellHandle, OS.move_focus, display.getClosure(MOVE_FOCUS), false);
        if (isCustomResize()) {
            if (!GTK.GTK4) {
                int mask = GDK.GDK_POINTER_MOTION_MASK | GDK.GDK_BUTTON_RELEASE_MASK | GDK.GDK_BUTTON_PRESS_MASK
                        | GDK.GDK_ENTER_NOTIFY_MASK | GDK.GDK_LEAVE_NOTIFY_MASK;
                GTK.gtk_widget_add_events(shellHandle, mask);
                OS.g_signal_connect_closure_by_id(shellHandle, display.signalIds[MOTION_NOTIFY_EVENT], 0,
                        display.getClosure(MOTION_NOTIFY_EVENT), false);
                OS.g_signal_connect_closure_by_id(shellHandle, display.signalIds[LEAVE_NOTIFY_EVENT], 0,
                        display.getClosure(LEAVE_NOTIFY_EVENT), false);

                OS.g_signal_connect_closure_by_id(shellHandle, display.signalIds[EXPOSE_EVENT], 0,
                        display.getClosure(EXPOSE_EVENT), false);
                OS.g_signal_connect_closure_by_id(shellHandle, display.signalIds[BUTTON_PRESS_EVENT], 0,
                        display.getClosure(BUTTON_PRESS_EVENT), false);
            }
        }
    }

    @Override
    public boolean isEnabled() {
        checkWidget();
        return getEnabled();
    }

    boolean isUndecorated() {
        return (style & (SWT.SHELL_TRIM | SWT.BORDER)) == SWT.NONE || (style & (SWT.NO_TRIM | SWT.ON_TOP)) != 0;
    }

    /**
     * Determines whether a Shell has both SWT.RESIZE and SWT.ON_TOP set without SWT.NO_TRIM.
     *
     * @return true if this Shell has both SWT.RESIZE and SWT.ON_TOP set without
     * SWT.NO_TRIM, false otherwise.
     */
    boolean isCustomResize() {
        return (style & SWT.NO_TRIM) == 0 && (style & (SWT.RESIZE | SWT.ON_TOP)) == (SWT.RESIZE | SWT.ON_TOP);
    }

    @Override
    public boolean isVisible() {
        checkWidget();
        return getVisible();
    }

    /**
     * Determines whether a Shell's parent is a popup window. See bug 534554.
     *
     * @return true if the parent of this Shell has style SWT.ON_TOP, false otherwise.
     */
    boolean isMappedToPopup() {
        return parent != null && (parent.style & SWT.ON_TOP) != 0;
    }

    @Override
    void register() {
        super.register();
        display.addWidget(shellHandle, this);
    }

    @Override
    void releaseParent() {
        /* Do nothing */
    }

    @Override
    public void requestLayout() {
        layout(null, SWT.DEFER);
    }

    @Override
    long topHandle() {
        return shellHandle;
    }

    @Override
    long paintHandle() {
        if (GTK.GTK4) {
            return handle;
        } else {
            return super.paintHandle();
        }
    }

    void fixActiveShell() {
        if (display.activeShell == this) {
            Shell shell = null;
            if (parent != null && parent.isVisible())
                shell = parent.getShell();
            if (shell == null && isUndecorated()) {
                Shell[] shells = display.getShells();
                for (int i = 0; i < shells.length; i++) {
                    if (shells[i] != null && shells[i].isVisible()) {
                        shell = shells[i];
                        break;
                    }
                }
            }
            if (shell != null)
                shell.bringToTop(false);
        }
    }

    void fixShell(Shell newShell, Control control) {
        if (this == newShell)
            return;
        if (control == lastActive)
            setActiveControl(null);
        String toolTipText = control.toolTipText;
        if (toolTipText != null) {
            control.setToolTipText(this, null);
            control.setToolTipText(newShell, toolTipText);
        }
    }

    @Override
    void fixStyle(long handle) {
    }

    @Override
    void forceResize() {
        GtkAllocation allocation = new GtkAllocation();
        GTK.gtk_widget_get_allocation(vboxHandle, allocation);
        if (!OS.isX11()) {
            /*
             * Bug 540163: We sometimes are getting the container's allocation
             * before Shell is fully opened, which gets an incorrect allocation.
             * Fix is to use the calculated box width/height if bounds have been set.
             */
            int border = gtk_container_get_border_width_or_margin(shellHandle);
            int boxWidth = oldWidth - 2 * border;
            int boxHeight = oldHeight - 2 * border;
            if (boxWidth != allocation.width || boxHeight != allocation.height) {
                allocation.width = Math.max(boxWidth, allocation.width);
                allocation.height = Math.max(boxHeight, allocation.height);
            }
        }
        forceResize(allocation.width, allocation.height);
    }

    void forceResize(int width, int height) {
        int clientWidth = 0;
        if ((style & SWT.MIRRORED) != 0)
            clientWidth = getClientWidth();
        GtkAllocation allocation = new GtkAllocation();
        int border = gtk_container_get_border_width_or_margin(shellHandle);
        allocation.x = border;
        allocation.y = border;
        allocation.width = width;
        allocation.height = height;
        // Call gtk_widget_get_preferred_size() on GTK 3.20+ to prevent warnings.
        // See bug 486068.
        if (GTK.GTK_VERSION >= OS.VERSION(3, 20, 0)) {
            GtkRequisition minimumSize = new GtkRequisition();
            GtkRequisition naturalSize = new GtkRequisition();
            GTK.gtk_widget_get_preferred_size(vboxHandle, minimumSize, naturalSize);
        }
        /*
         * Bug 535075, 536153: On Wayland, we need to set the position of the GtkBox container
         * relative to the shellHandle to prevent window contents rendered with offset.
         */
        if (!OS.isX11()) {
            int[] dest_x = new int[1];
            int[] dest_y = new int[1];
            GTK.gtk_widget_translate_coordinates(vboxHandle, shellHandle, 0, 0, dest_x, dest_y);
            if (dest_x[0] != -1 && dest_y[0] != -1 && !isMappedToPopup()) {
                allocation.x += dest_x[0];
                allocation.y += dest_y[0];
            }
        }
        if (GTK.GTK4) {
            GTK.gtk_widget_size_allocate(vboxHandle, allocation, -1);
        } else {
            GTK.gtk_widget_size_allocate(vboxHandle, allocation);
        }
        if ((style & SWT.MIRRORED) != 0)
            moveChildren(clientWidth);
    }

    /**
     * Returns the receiver's alpha value. The alpha value
     * is between 0 (transparent) and 255 (opaque).
     *
     * @return the alpha value
     *
     * @exception SWTException <ul>
     *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
     *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
     * </ul>
     *
     * @since 3.4
     */
    public int getAlpha() {
        checkWidget();
        boolean composited;
        if (GTK.GTK4) {
            long display = GDK.gdk_display_get_default();
            composited = GDK.gdk_display_is_composited(display);
        } else {
            long screen = GTK.gtk_widget_get_screen(shellHandle);
            composited = GDK.gdk_screen_is_composited(screen);
        }
        if (composited) {
            return (int) (GTK.gtk_widget_get_opacity(shellHandle) * 255);
        }
        return 255;
    }

    int getResizeMode(double x, double y) {
        GtkAllocation allocation = new GtkAllocation();
        GTK.gtk_widget_get_allocation(shellHandle, allocation);
        int width = allocation.width;
        int height = allocation.height;
        int border = gtk_container_get_border_width_or_margin(shellHandle);
        int mode = 0;
        if (y >= height - border) {
            mode = GDK.GDK_BOTTOM_SIDE;
            if (x >= width - border - 16)
                mode = GDK.GDK_BOTTOM_RIGHT_CORNER;
            else if (x <= border + 16)
                mode = GDK.GDK_BOTTOM_LEFT_CORNER;
        } else if (x >= width - border) {
            mode = GDK.GDK_RIGHT_SIDE;
            if (y >= height - border - 16)
                mode = GDK.GDK_BOTTOM_RIGHT_CORNER;
            else if (y <= border + 16)
                mode = GDK.GDK_TOP_RIGHT_CORNER;
        } else if (y <= border) {
            mode = GDK.GDK_TOP_SIDE;
            if (x <= border + 16)
                mode = GDK.GDK_TOP_LEFT_CORNER;
            else if (x >= width - border - 16)
                mode = GDK.GDK_TOP_RIGHT_CORNER;
        } else if (x <= border) {
            mode = GDK.GDK_LEFT_SIDE;
            if (y <= border + 16)
                mode = GDK.GDK_TOP_LEFT_CORNER;
            else if (y >= height - border - 16)
                mode = GDK.GDK_BOTTOM_LEFT_CORNER;
        }
        return mode;
    }

    /**
     * Returns <code>true</code> if the receiver is currently
     * in fullscreen state, and false otherwise.
     * <p>
     *
     * @return the fullscreen state
     *
     * @exception SWTException <ul>
     *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
     *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
     * </ul>
     *
     * @since 3.4
     */
    public boolean getFullScreen() {
        checkWidget();
        return fullScreen;
    }

    @Override
    Point getLocationInPixels() {
        checkWidget();
        // Bug in GTK: when shell is moved and then hidden, its location does not get updated.
        // Move it before getting its location.
        if (!getVisible() && moved) {
            setLocationInPixels(oldX, oldY);
        }
        int[] x = new int[1], y = new int[1];
        GTK.gtk_window_get_position(shellHandle, x, y);
        return new Point(x[0], y[0]);
    }

    @Override
    public boolean getMaximized() {
        checkWidget();
        return !fullScreen && super.getMaximized();
    }

    /**
     * Returns a point describing the minimum receiver's size. The
     * x coordinate of the result is the minimum width of the receiver.
     * The y coordinate of the result is the minimum height of the
     * receiver.
     *
     * @return the receiver's size
     *
     * @exception SWTException <ul>
     *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
     *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
     * </ul>
     *
     * @since 3.1
     */
    public Point getMinimumSize() {
        checkWidget();
        return DPIUtil.autoScaleDown(getMinimumSizeInPixels());
    }

    Point getMinimumSizeInPixels() {
        checkWidget();
        int width = Math.max(1, minWidth + trimWidth());
        int height = Math.max(1, minHeight + trimHeight());
        return new Point(width, height);
    }

    Shell getModalShell() {
        Shell shell = null;
        Shell[] modalShells = display.modalShells;
        if (modalShells != null) {
            int bits = SWT.APPLICATION_MODAL | SWT.SYSTEM_MODAL;
            int index = modalShells.length;
            while (--index >= 0) {
                Shell modal = modalShells[index];
                if (modal != null) {
                    if ((modal.style & bits) != 0) {
                        Control control = this;
                        while (control != null) {
                            if (control == modal)
                                break;
                            control = control.parent;
                        }
                        if (control != modal)
                            return modal;
                        break;
                    }
                    if ((modal.style & SWT.PRIMARY_MODAL) != 0) {
                        if (shell == null)
                            shell = getShell();
                        if (modal.parent == shell)
                            return modal;
                    }
                }
            }
        }
        return null;
    }

    /**
     * Gets the receiver's modified state.
     *
     * @return <code>true</code> if the receiver is marked as modified, or <code>false</code> otherwise
     *
     * @exception SWTException <ul>
     *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
     *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
     * </ul>
     *
     * @since 3.5
     */
    public boolean getModified() {
        checkWidget();
        return modified;
    }

    @Override
    Point getSizeInPixels() {
        checkWidget();
        GtkAllocation allocation = new GtkAllocation();
        GTK.gtk_widget_get_allocation(vboxHandle, allocation);
        int width = allocation.width;
        int height = allocation.height;
        int border = 0;
        if ((style & (SWT.NO_TRIM | SWT.BORDER | SWT.SHELL_TRIM)) == 0 || isCustomResize()) {
            border = gtk_container_get_border_width_or_margin(shellHandle);
        }
        return new Point(width + trimWidth() + 2 * border, height + trimHeight() + 2 * border);
    }

    @Override
    public boolean getVisible() {
        checkWidget();
        return GTK.gtk_widget_get_visible(shellHandle);
    }

    /**
     * Returns the region that defines the shape of the shell,
     * or <code>null</code> if the shell has the default shape.
     *
     * @return the region that defines the shape of the shell, or <code>null</code>
     *
     * @exception SWTException <ul>
     *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
     *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
     * </ul>
     *
     * @since 3.0
     *
     */
    @Override
    public Region getRegion() {
        /* This method is needed for @since 3.0 Javadoc */
        checkWidget();
        if (originalRegion != null)
            return originalRegion;
        return region;
    }

    /**
     * Returns the receiver's input method editor mode. This
     * will be the result of bitwise OR'ing together one or
     * more of the following constants defined in class
     * <code>SWT</code>:
     * <code>NONE</code>, <code>ROMAN</code>, <code>DBCS</code>,
     * <code>PHONETIC</code>, <code>NATIVE</code>, <code>ALPHA</code>.
     *
     * @return the IME mode
     *
     * @exception SWTException <ul>
     *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
     *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
     * </ul>
     *
     * @see SWT
     */
    public int getImeInputMode() {
        checkWidget();
        return SWT.NONE;
    }

    @Override
    Shell _getShell() {
        return this;
    }

    /**
     * Returns an array containing all shells which are
     * descendants of the receiver.
     * <p>
     * @return the dialog shells
     *
     * @exception SWTException <ul>
     *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
     *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
     * </ul>
     */
    public Shell[] getShells() {
        checkWidget();
        int count = 0;
        Shell[] shells = display.getShells();
        for (int i = 0; i < shells.length; i++) {
            Control shell = shells[i];
            do {
                shell = shell.getParent();
            } while (shell != null && shell != this);
            if (shell == this)
                count++;
        }
        int index = 0;
        Shell[] result = new Shell[count];
        for (int i = 0; i < shells.length; i++) {
            Control shell = shells[i];
            do {
                shell = shell.getParent();
            } while (shell != null && shell != this);
            if (shell == this) {
                result[index++] = shells[i];
            }
        }
        return result;
    }

    @Override
    long gtk_event(long widget, long event) {
        if (!GTK.GTK4)
            return 0;
        int eventType = GDK.gdk_event_get_event_type(event);
        switch (eventType) {
        case GDK.GDK4_BUTTON_PRESS: {
            return gtk_button_press_event(widget, event);
        }
        case GDK.GDK4_BUTTON_RELEASE: {
            return gtk_button_release_event(widget, event);
        }
        case GDK.GDK4_CONFIGURE: {
            return gtk_configure_event(widget, event);
        }
        }
        return 0;
    }

    @Override
    long gtk_button_press_event(long widget, long event) {
        if (widget == shellHandle) {
            if (isCustomResize()) {
                if (OS.isX11() && (style & SWT.ON_TOP) != 0 && (style & SWT.NO_FOCUS) == 0) {
                    forceActive();
                }
                double[] eventRX = new double[1];
                double[] eventRY = new double[1];
                GDK.gdk_event_get_root_coords(event, eventRX, eventRY);
                int[] eventButton = new int[1];
                GDK.gdk_event_get_button(event, eventButton);
                if (eventButton[0] == 1) {
                    display.resizeLocationX = eventRX[0];
                    display.resizeLocationY = eventRY[0];
                    int[] x = new int[1], y = new int[1];
                    GTK.gtk_window_get_position(shellHandle, x, y);
                    display.resizeBoundsX = x[0];
                    display.resizeBoundsY = y[0];
                    GtkAllocation allocation = new GtkAllocation();
                    GTK.gtk_widget_get_allocation(shellHandle, allocation);
                    display.resizeBoundsWidth = allocation.width;
                    display.resizeBoundsHeight = allocation.height;
                }
            }
            /**
             *  Feature in GTK: This handles ungrabbing the keyboard focus from a SWT.ON_TOP window
             *  if it has editable fields and is running Wayland. Refer to bug 515773.
             */
            if (requiresUngrab()) {
                long seat = GDK.gdk_event_get_seat(event);
                GDK.gdk_seat_ungrab(seat);
                GTK.gtk_grab_remove(shellHandle);
            }
            return 0;
        }
        return super.gtk_button_press_event(widget, event);
    }

    @Override
    long gtk_configure_event(long widget, long event) {
        int[] x = new int[1], y = new int[1];
        GTK.gtk_window_get_position(shellHandle, x, y);

        if (!isVisible()) {
            return 0; //We shouldn't handle move/resize events if shell is hidden.
        }

        if (!moved || oldX != x[0] || oldY != y[0]) {
            moved = true;
            oldX = x[0];
            oldY = y[0];
            sendEvent(SWT.Move);
            // widget could be disposed at this point
        }
        return 0;
    }

    @Override
    long gtk_close_request(long widget) {
        if (isEnabled())
            closeWidget();
        return 1;
    }

    @Override
    long gtk_delete_event(long widget, long event) {
        if (isEnabled())
            closeWidget();
        return 1;
    }

    @Override
    long gtk_enter_notify_event(long widget, long event) {
        if (widget != shellHandle) {
            return super.gtk_enter_notify_event(widget, event);
        }
        return 0;
    }

    @Override
    long gtk_draw(long widget, long cairo) {
        if (widget == shellHandle) {
            if (isCustomResize()) {
                int[] width = new int[1];
                int[] height = new int[1];
                long window = gtk_widget_get_window(widget);
                gdk_window_get_size(window, width, height);
                int border = gtk_container_get_border_width_or_margin(widget);
                long context = GTK.gtk_widget_get_style_context(shellHandle);
                //TODO draw shell frame on GTK3
                GTK.gtk_style_context_save(context);
                GTK.gtk_render_frame(context, cairo, 0, 0, width[0], border);
                GTK.gtk_render_frame(context, cairo, 0, height[0] - border, width[0], border);
                GTK.gtk_render_frame(context, cairo, 0, border, border, height[0] - border - border);
                GTK.gtk_render_frame(context, cairo, width[0] - border, border, border,
                        height[0] - border - border);
                GTK.gtk_render_frame(context, cairo, 0 + 10, 0 + 10, width[0] - 20, height[0] - 20);
                GTK.gtk_style_context_restore(context);
                return 1;
            }
            if (GTK.GTK4) {
                super.gtk_draw(widget, cairo);
            }
            return 0;
        }
        return super.gtk_draw(widget, cairo);
    }

    @Override
    long gtk_focus(long widget, long directionType) {
        switch ((int) directionType) {
        case GTK.GTK_DIR_TAB_FORWARD:
        case GTK.GTK_DIR_TAB_BACKWARD:
            Control control = display.getFocusControl();
            if (control != null) {
                if ((control.state & CANVAS) != 0 && (control.style & SWT.EMBEDDED) != 0
                        && control.getShell() == this) {
                    int traversal = directionType == GTK.GTK_DIR_TAB_FORWARD ? SWT.TRAVERSE_TAB_NEXT
                            : SWT.TRAVERSE_TAB_PREVIOUS;
                    control.traverse(traversal);
                    return 1;
                }
            }
            break;
        }
        return super.gtk_focus(widget, directionType);
    }

    @Override
    long gtk_focus_in_event(long widget, long event) {
        if (widget != shellHandle) {
            return super.gtk_focus_in_event(widget, event);
        }
        display.activeShell = this;
        display.activePending = false;
        if (!ignoreFocusIn) {
            sendEvent(SWT.Activate);
        } else {
            ignoreFocusIn = false;
        }
        return 0;
    }

    @Override
    long gtk_focus_out_event(long widget, long event) {
        if (widget != shellHandle) {
            return super.gtk_focus_out_event(widget, event);
        }
        Display display = this.display;
        if (!ignoreFocusOut && !ignoreFocusOutAfterGrab) {
            sendEvent(SWT.Deactivate);
            setActiveControl(null);
        }
        ignoreFocusOutAfterGrab = false;
        if (display.activeShell == this && !ignoreFocusOut) {
            display.activeShell = null;
            display.activePending = false;
        }
        return 0;
    }

    @Override
    long gtk_leave_notify_event(long widget, long event) {
        if (widget == shellHandle) {
            if (isCustomResize()) {
                int[] state = new int[1];
                GDK.gdk_event_get_state(event, state);
                if ((state[0] & GDK.GDK_BUTTON1_MASK) == 0) {
                    if (GTK.GTK4) {
                        GTK.gtk_widget_set_cursor(shellHandle, 0);
                    } else {
                        long window = gtk_widget_get_window(shellHandle);
                        GDK.gdk_window_set_cursor(window, 0);
                    }
                    display.resizeMode = 0;
                }
            }
            return 0;
        }
        return super.gtk_leave_notify_event(widget, event);
    }

    @Override
    long gtk_map(long widget) {
        // No "map-event" signal on GTK4, set mapped here instead
        if (GTK.GTK4) {
            mapped = true;
        }
        return super.gtk_map(widget);
    }

    @Override
    long gtk_move_focus(long widget, long directionType) {
        Control control = display.getFocusControl();
        if (control != null) {
            long focusHandle = control.focusHandle();
            GTK.gtk_widget_child_focus(focusHandle, (int) directionType);
        }
        OS.g_signal_stop_emission_by_name(shellHandle, OS.move_focus);
        return 1;
    }

    @Override
    long gtk_motion_notify_event(long widget, long event) {
        if (widget == shellHandle) {
            if (isCustomResize()) {
                int[] state = new int[1];
                GDK.gdk_event_get_state(event, state);
                double[] eventRX = new double[1];
                double[] eventRY = new double[1];
                GDK.gdk_event_get_root_coords(event, eventRX, eventRY);
                if ((state[0] & GDK.GDK_BUTTON1_MASK) != 0) {
                    int border = gtk_container_get_border_width_or_margin(shellHandle);
                    int dx = (int) (eventRX[0] - display.resizeLocationX);
                    int dy = (int) (eventRY[0] - display.resizeLocationY);
                    int x = display.resizeBoundsX;
                    int y = display.resizeBoundsY;
                    int width = display.resizeBoundsWidth;
                    int height = display.resizeBoundsHeight;
                    int newWidth = Math.max(width - dx, Math.max(minWidth, border + border));
                    int newHeight = Math.max(height - dy, Math.max(minHeight, border + border));
                    switch (display.resizeMode) {
                    case GDK.GDK_LEFT_SIDE:
                        x += width - newWidth;
                        width = newWidth;
                        break;
                    case GDK.GDK_TOP_LEFT_CORNER:
                        x += width - newWidth;
                        width = newWidth;
                        y += height - newHeight;
                        height = newHeight;
                        break;
                    case GDK.GDK_TOP_SIDE:
                        y += height - newHeight;
                        height = newHeight;
                        break;
                    case GDK.GDK_TOP_RIGHT_CORNER:
                        width = Math.max(width + dx, Math.max(minWidth, border + border));
                        y += height - newHeight;
                        height = newHeight;
                        break;
                    case GDK.GDK_RIGHT_SIDE:
                        width = Math.max(width + dx, Math.max(minWidth, border + border));
                        break;
                    case GDK.GDK_BOTTOM_RIGHT_CORNER:
                        width = Math.max(width + dx, Math.max(minWidth, border + border));
                        height = Math.max(height + dy, Math.max(minHeight, border + border));
                        break;
                    case GDK.GDK_BOTTOM_SIDE:
                        height = Math.max(height + dy, Math.max(minHeight, border + border));
                        break;
                    case GDK.GDK_BOTTOM_LEFT_CORNER:
                        x += width - newWidth;
                        width = newWidth;
                        height = Math.max(height + dy, Math.max(minHeight, border + border));
                        break;
                    }
                    if (x != display.resizeBoundsX || y != display.resizeBoundsY) {
                        if (GTK.GTK4) {
                            GDK.gdk_surface_move_resize(gtk_widget_get_surface(shellHandle), x, y, width, height);
                        } else {
                            GDK.gdk_window_move_resize(gtk_widget_get_window(shellHandle), x, y, width, height);
                        }
                    } else {
                        GTK.gtk_window_resize(shellHandle, width, height);
                    }
                } else {
                    double[] eventX = new double[1];
                    double[] eventY = new double[1];
                    GDK.gdk_event_get_coords(event, eventX, eventY);
                    int mode = getResizeMode(eventX[0], eventY[0]);
                    if (mode != display.resizeMode) {
                        long cursor;
                        if (GTK.GTK4) {
                            byte[] name;
                            switch (mode) {
                            case GDK.GDK_BOTTOM_RIGHT_CORNER:
                                name = Converter.wcsToMbcs("se-resize", true);
                                break;
                            case GDK.GDK_BOTTOM_LEFT_CORNER:
                                name = Converter.wcsToMbcs("sw-resize", true);
                                break;
                            case GDK.GDK_TOP_LEFT_CORNER:
                                name = Converter.wcsToMbcs("nw-resize", true);
                                break;
                            case GDK.GDK_TOP_RIGHT_CORNER:
                                name = Converter.wcsToMbcs("ne-resize", true);
                                break;
                            case GDK.GDK_BOTTOM_SIDE:
                                name = Converter.wcsToMbcs("s-resize", true);
                                break;
                            case GDK.GDK_TOP_SIDE:
                                name = Converter.wcsToMbcs("n-resize", true);
                                break;
                            case GDK.GDK_LEFT_SIDE:
                                name = Converter.wcsToMbcs("w-resize", true);
                                break;
                            case GDK.GDK_RIGHT_SIDE:
                                name = Converter.wcsToMbcs("e-resize", true);
                                break;
                            default:
                                name = Converter.wcsToMbcs("none", true);
                                break;
                            }
                            cursor = GDK.gdk_cursor_new_from_name(name, 0);
                            GTK.gtk_widget_set_cursor(shellHandle, cursor);
                        } else {
                            long window = gtk_widget_get_window(shellHandle);
                            cursor = GDK.gdk_cursor_new_for_display(GDK.gdk_display_get_default(), mode);
                            GDK.gdk_window_set_cursor(window, cursor);
                        }
                        OS.g_object_unref(cursor);
                        display.resizeMode = mode;
                    }
                }
            }
            return 0;
        }
        return super.gtk_motion_notify_event(widget, event);
    }

    @Override
    long gtk_key_press_event(long widget, long event) {
        if (widget == shellHandle) {
            /* Stop menu mnemonics when the shell is disabled */
            if ((state & DISABLED) != 0)
                return 1;

            if (menuBar != null && !menuBar.isDisposed()) {
                Control focusControl = display.getFocusControl();
                if (focusControl != null
                        && (focusControl.hooks(SWT.KeyDown) || focusControl.filters(SWT.KeyDown))) {
                    long[] accel = new long[1];
                    long setting = GTK.gtk_settings_get_default();
                    OS.g_object_get(setting, GTK.gtk_menu_bar_accel, accel, 0);
                    if (accel[0] != 0) {
                        int[] keyval = new int[1];
                        int[] mods = new int[1];
                        GTK.gtk_accelerator_parse(accel[0], keyval, mods);
                        OS.g_free(accel[0]);
                        if (keyval[0] != 0) {
                            int[] key = new int[1];
                            GDK.gdk_event_get_keyval(event, key);
                            int[] state = new int[1];
                            GDK.gdk_event_get_state(event, state);
                            int mask = GTK.gtk_accelerator_get_default_mod_mask();
                            if (key[0] == keyval[0] && (state[0] & mask) == (mods[0] & mask)) {
                                return focusControl.gtk_key_press_event(focusControl.focusHandle(), event);
                            }
                        }
                    }
                }
            }
            return 0;
        }
        return super.gtk_key_press_event(widget, event);
    }

    @Override
    long gtk_size_allocate(long widget, long allocation) {
        int width, height;
        int[] widthA = new int[1];
        int[] heightA = new int[1];
        GTK.gtk_window_get_size(shellHandle, widthA, heightA);
        width = widthA[0];
        height = heightA[0];

        //   Bug 474235: on Wayland gtk_size_allocate() is called more frequently, causing an
        //  infinitely recursive resize call. This causes non-resizable Shells/Dialogs to
        //  crash. Fix: only call resizeBounds() on resizable Shells.
        if ((!resized || oldWidth != width || oldHeight != height)
                && (!OS.isX11() ? ((style & SWT.RESIZE) != 0) : true)) { //Wayland
            oldWidth = width;
            oldHeight = height;
            resizeBounds(width, height, true); //this is called to resize child widgets when the shell is resized.
        }
        return 0;
    }

    private void updateDecorations(long gdkResource) {
        if (OS.isX11()) {
            /*
             * Feature in X11. Configuring window decorations when
             * 'GTK_CSD=1' is set causes the window to have double
             * decorations.
             *
             * When client-side decorations (CSD) are in use,
             * server-side decorations (window title, borders, etc)
             * are hidden and GTK draws them instead. In this case,
             * configuring GDK window will at best have no effect,
             * because its decorations are hidden.
             *
             * On X11, it's even worse: it will cause server-side
             * decorations to appear, and window will have double
             * decorations.
             *
             * Current GTK implementation will ignore gdk_surface_set_decorations()
             * on Wayland and MIR anyway, so I decided to narrow
             * the workaround to X11 only to get a simpler
             * implementation. For example, getting CSD status via
             * 'GTK_CSD' variable is reliable on X11 only: on MIR
             * and Wayland more settings come into play,
             * @see 'gtk_window_should_use_csd' in GTK sources.
             */
            String gtkCsdValue = System.getenv("GTK_CSD");
            if ((gtkCsdValue != null) && gtkCsdValue.equals("1"))
                return;
        }

        int decorations = 0;
        int functions = 0;
        if ((style & SWT.NO_TRIM) == 0) {
            if ((style & SWT.MIN) != 0) {
                decorations |= GDK.GDK_DECOR_MINIMIZE;
                functions |= GDK.GDK_FUNC_MINIMIZE;
            }
            if ((style & SWT.MAX) != 0) {
                decorations |= GDK.GDK_DECOR_MAXIMIZE;
                functions |= GDK.GDK_FUNC_MAXIMIZE;
            }
            if ((style & SWT.RESIZE) != 0) {
                decorations |= GDK.GDK_DECOR_RESIZEH;
                functions |= GDK.GDK_FUNC_RESIZE;
            }
            if ((style & SWT.BORDER) != 0)
                decorations |= GDK.GDK_DECOR_BORDER;
            if ((style & SWT.MENU) != 0)
                decorations |= GDK.GDK_DECOR_MENU;
            if ((style & SWT.TITLE) != 0)
                decorations |= GDK.GDK_DECOR_TITLE;
            if ((style & SWT.CLOSE) != 0)
                functions |= GDK.GDK_FUNC_CLOSE;
            /*
             * Feature in GTK.  Under some Window Managers (Sawmill), in order
             * to get any border at all from the window manager it is necessary to
             * set GDK_DECOR_BORDER.  The fix is to force these bits when any
             * kind of border is requested.
             */
            if ((style & SWT.RESIZE) != 0)
                decorations |= GDK.GDK_DECOR_BORDER;
            if ((style & SWT.NO_MOVE) == 0)
                functions |= GDK.GDK_FUNC_MOVE;
        }
        if (GTK.GTK4) {
            GDK.gdk_surface_set_decorations(gdkResource, decorations);
            GDK.gdk_surface_set_functions(gdkResource, functions);
        } else {
            GDK.gdk_window_set_decorations(gdkResource, decorations);
            /*
             * For systems running Metacity, this call forces the style hints to
             * be displayed in a window's titlebar. Otherwise, the decorations
             * set by the function gdk_window_set_decorations (window,
             * decorations) are ignored by the window manager.
             */
            GDK.gdk_window_set_functions(gdkResource, functions);
        }
    }

    @Override
    long gtk_realize(long widget) {
        long result = super.gtk_realize(widget);
        long gdkResource;
        if (GTK.GTK4) {
            gdkResource = gtk_widget_get_surface(shellHandle);
        } else {
            gdkResource = gtk_widget_get_window(shellHandle);
        }
        if ((style & SWT.SHELL_TRIM) != SWT.SHELL_TRIM) {
            updateDecorations(gdkResource);
        } else if ((style & SWT.NO_MOVE) != 0) {
            // if the GDK_FUNC_ALL bit is present, all the other style
            // bits specified as a parameter will be removed from the window
            if (GTK.GTK4) {
                GDK.gdk_surface_set_functions(gdkResource, GDK.GDK_FUNC_ALL | GDK.GDK_FUNC_MOVE);
            } else {
                GDK.gdk_window_set_functions(gdkResource, GDK.GDK_FUNC_ALL | GDK.GDK_FUNC_MOVE);
            }
        }

        if ((style & SWT.ON_TOP) != 0)
            GTK.gtk_window_set_keep_above(shellHandle, true);
        return result;
    }

    @Override
    long gtk_window_state_event(long widget, long event) {
        GdkEventWindowState gdkEvent = new GdkEventWindowState();
        OS.memmove(gdkEvent, event, GdkEventWindowState.sizeof);
        minimized = (gdkEvent.new_window_state & GDK.GDK_WINDOW_STATE_ICONIFIED) != 0;
        maximized = (gdkEvent.new_window_state & GDK.GDK_WINDOW_STATE_MAXIMIZED) != 0;
        fullScreen = (gdkEvent.new_window_state & GDK.GDK_WINDOW_STATE_FULLSCREEN) != 0;
        if ((gdkEvent.changed_mask & GDK.GDK_WINDOW_STATE_ICONIFIED) != 0) {
            if (minimized) {
                sendEvent(SWT.Iconify);
            } else {
                sendEvent(SWT.Deiconify);
            }
            updateMinimized(minimized);
        }
        return 0;
    }

    @Override
    long notifyStateProc(long gdk_handle, long handle) {
        // GTK4 equivalent of gtk_window_state_event
        assert GTK.GTK4;
        int gdkSurfaceState = GDK.gdk_surface_get_state(gdk_handle);
        minimized = (gdkSurfaceState & GDK.GDK_SURFACE_STATE_ICONIFIED) != 0;
        maximized = (gdkSurfaceState & GDK.GDK_SURFACE_STATE_MAXIMIZED) != 0;
        fullScreen = (gdkSurfaceState & GDK.GDK_SURFACE_STATE_FULLSCREEN) != 0;
        if ((gdkSurfaceState & GDK.GDK_SURFACE_STATE_ICONIFIED) != 0) {
            if (minimized) {
                sendEvent(SWT.Iconify);
            } else {
                sendEvent(SWT.Deiconify);
            }
            updateMinimized(minimized);
        }
        return 0;
    }

    /**
     * Moves the receiver to the top of the drawing order for
     * the display on which it was created (so that all other
     * shells on that display, which are not the receiver's
     * children will be drawn behind it), marks it visible,
     * sets the focus and asks the window manager to make the
     * shell active.
     *
     * @exception SWTException <ul>
     *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
     *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
     * </ul>
     *
     * @see Control#moveAbove
     * @see Control#setFocus
     * @see Control#setVisible
     * @see Display#getActiveShell
     * @see Decorations#setDefaultButton(Button)
     * @see Shell#setActive
     * @see Shell#forceActive
     */
    public void open() {
        checkWidget();
        bringToTop(false);
        if (Shell.class.isInstance(getParent()) && !getParent().isVisible()) {
            Shell.class.cast(getParent()).open();
        }
        setVisible(true);
        if (isDisposed())
            return;
        /*
         * When no widget has been given focus, or another push button has focus,
         * give focus to the default button. This avoids overriding the default
         * button.
         */
        boolean restored = restoreFocus();
        if (!restored) {
            restored = traverseGroup(true);
        }
        if (restored) {
            Control focusControl = display.getFocusControl();
            if (focusControl instanceof Button && (focusControl.style & SWT.PUSH) != 0) {
                restored = false;
            }
        }
        if (!restored) {
            /* If a shell is opened during the FocusOut event of a widget,
             * it is required to set focus to all shells except for ON_TOP
             * shells in order to maintain consistency with other platforms.
             */
            if ((style & SWT.ON_TOP) == 0)
                display.focusEvent = SWT.None;

            if (defaultButton != null && !defaultButton.isDisposed()) {
                defaultButton.setFocus();
            } else {
                setFocus();
            }
        }
    }

    @Override
    public boolean print(GC gc) {
        checkWidget();
        if (gc == null)
            error(SWT.ERROR_NULL_ARGUMENT);
        if (gc.isDisposed())
            error(SWT.ERROR_INVALID_ARGUMENT);
        // Needs to be implemented on GTK4/Wayland
        if (!GTK.GTK4 && OS.isX11()) {
            Rectangle clipping = gc.getClipping();
            long shellWindow = gtk_widget_get_window(shellHandle);
            GdkRectangle rect = new GdkRectangle();
            GDK.gdk_window_get_frame_extents(shellWindow, rect);
            if (clipping.height < rect.height || clipping.width < rect.width) {
                System.err.println("Warning: the GC provided to Shell.print() has a smaller"
                        + " clipping than what is needed to print the Shell trimmings"
                        + " and content. Only the client area will be printed.");
                return super.print(gc);
            }
            long rootWindow = GDK.gdk_get_default_root_window();
            long pixbuf = GDK.gdk_pixbuf_get_from_window(rootWindow, rect.x, rect.y, rect.width, rect.height);
            if (pixbuf != 0) {
                GDK.gdk_cairo_set_source_pixbuf(gc.handle, pixbuf, 0, 0);
                Cairo.cairo_paint(gc.handle);
                OS.g_object_unref(pixbuf);
                return true;
            }
        }
        return false;
    }

    /**
     * Removes the listener from the collection of listeners who will
     * be notified when operations are performed on the receiver.
     *
     * @param listener the listener which should no longer be notified
     *
     * @exception IllegalArgumentException <ul>
     *    <li>ERROR_NULL_ARGUMENT - if the listener is null</li>
     * </ul>
     * @exception SWTException <ul>
     *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
     *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
     * </ul>
     *
     * @see ShellListener
     * @see #addShellListener
     */
    public void removeShellListener(ShellListener listener) {
        checkWidget();
        if (listener == null)
            error(SWT.ERROR_NULL_ARGUMENT);
        if (eventTable == null)
            return;
        eventTable.unhook(SWT.Close, listener);
        eventTable.unhook(SWT.Iconify, listener);
        eventTable.unhook(SWT.Deiconify, listener);
        eventTable.unhook(SWT.Activate, listener);
        eventTable.unhook(SWT.Deactivate, listener);
    }

    void removeTooTip(ToolTip toolTip) {
        if (toolTips == null)
            return;
        for (int i = 0; i < toolTips.length; i++) {
            if (toolTips[i] == toolTip) {
                toolTips[i] = null;
                return;
            }
        }
    }

    @Override
    void reskinChildren(int flags) {
        Shell[] shells = getShells();
        for (int i = 0; i < shells.length; i++) {
            Shell shell = shells[i];
            if (shell != null)
                shell.reskin(flags);
        }
        if (toolTips != null) {
            for (int i = 0; i < toolTips.length; i++) {
                ToolTip toolTip = toolTips[i];
                if (toolTip != null)
                    toolTip.reskin(flags);
            }
        }
        super.reskinChildren(flags);
    }

    /**
     * If the receiver is visible, moves it to the top of the
     * drawing order for the display on which it was created
     * (so that all other shells on that display, which are not
     * the receiver's children will be drawn behind it) and asks
     * the window manager to make the shell active
     *
     * @exception SWTException <ul>
     *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
     *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
     * </ul>
     *
     * @since 2.0
     * @see Control#moveAbove
     * @see Control#setFocus
     * @see Control#setVisible
     * @see Display#getActiveShell
     * @see Decorations#setDefaultButton(Button)
     * @see Shell#open
     * @see Shell#setActive
     */
    public void setActive() {
        checkWidget();
        bringToTop(false);
    }

    void setActiveControl(Control control) {
        setActiveControl(control, SWT.None);
    }

    void setActiveControl(Control control, int type) {
        if (control != null && control.isDisposed())
            control = null;
        if (lastActive != null && lastActive.isDisposed())
            lastActive = null;
        if (lastActive == control)
            return;

        /*
        * Compute the list of controls to be activated and
        * deactivated by finding the first common parent
        * control.
        */
        Control[] activate = (control == null) ? new Control[0] : control.getPath();
        Control[] deactivate = (lastActive == null) ? new Control[0] : lastActive.getPath();
        lastActive = control;
        int index = 0, length = Math.min(activate.length, deactivate.length);
        while (index < length) {
            if (activate[index] != deactivate[index])
                break;
            index++;
        }

        /*
        * It is possible (but unlikely), that application
        * code could have destroyed some of the widgets. If
        * this happens, keep processing those widgets that
        * are not disposed.
        */
        for (int i = deactivate.length - 1; i >= index; --i) {
            if (!deactivate[i].isDisposed()) {
                deactivate[i].sendEvent(SWT.Deactivate);
            }
        }
        for (int i = activate.length - 1; i >= index; --i) {
            if (!activate[i].isDisposed()) {
                Event event = new Event();
                event.detail = type;
                activate[i].sendEvent(SWT.Activate, event);
            }
        }
    }

    /**
     * Sets the receiver's alpha value which must be
     * between 0 (transparent) and 255 (opaque).
     * <p>
     * This operation requires the operating system's advanced
     * widgets subsystem which may not be available on some
     * platforms.
     * </p>
     * @param alpha the alpha value
     *
     * @exception SWTException <ul>
     *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
     *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
     * </ul>
     *
     * @since 3.4
     */
    public void setAlpha(int alpha) {
        checkWidget();
        boolean composited;
        if (GTK.GTK4) {
            long display = GDK.gdk_display_get_default();
            composited = GDK.gdk_display_is_composited(display);
        } else {
            long screen = GTK.gtk_widget_get_screen(shellHandle);
            composited = GDK.gdk_screen_is_composited(screen);
        }
        if (composited) {
            GTK.gtk_widget_set_opacity(shellHandle, (double) alpha / 255);
        }
    }

    void resizeBounds(int width, int height, boolean notify) {
        int border = gtk_container_get_border_width_or_margin(shellHandle);
        if (GTK.GTK4) {
            if (redrawSurface != 0) {
                GDK.gdk_surface_resize(redrawSurface, width, height);
            }
            if (redrawSurface != 0) {
                GDK.gdk_surface_resize(redrawSurface, width, height);
            }
            if (parent != null) {
                GtkAllocation allocation = new GtkAllocation();
                allocation.width = width;
                allocation.height = height;
                GTK.gtk_widget_size_allocate(shellHandle, allocation, -1);
            }
        } else {
            if (redrawWindow != 0) {
                GDK.gdk_window_resize(redrawWindow, width, height);
            }
            if (enableWindow != 0) {
                GDK.gdk_window_resize(enableWindow, width, height);
            }
        }
        int boxWidth = width - 2 * border;
        int boxHeight = height - 2 * border;
        if ((style & SWT.RESIZE) == 0) {
            GTK.gtk_widget_set_size_request(vboxHandle, boxWidth, boxHeight);
        }
        forceResize(boxWidth, boxHeight);
        if (notify) {
            resized = true;
            sendEvent(SWT.Resize);
            if (isDisposed())
                return;
            if (layout != null) {
                markLayout(false, false);
                updateLayout(false);
            }
        }
    }

    @Override
    int setBounds(int x, int y, int width, int height, boolean move, boolean resize) {
        // bug in GTK2 crashes JVM, in GTK3 the new shell only. See bug 472743
        width = Math.min(width, (2 << 14) - 1);
        height = Math.min(height, (2 << 14) - 1);

        if (fullScreen)
            setFullScreen(false);
        /*
        * Bug in GTK.  When either of the location or size of
        * a shell is changed while the shell is maximized, the
        * shell is moved to (0, 0).  The fix is to explicitly
        * unmaximize the shell before setting the bounds to
        * anything different from the current bounds.
        */
        if (getMaximized()) {
            Rectangle rect = getBoundsInPixels();
            boolean sameOrigin = !move || (rect.x == x && rect.y == y);
            boolean sameExtent = !resize || (rect.width == width && rect.height == height);
            if (sameOrigin && sameExtent)
                return 0;
            setMaximized(false);
        }
        int result = 0;
        if (move) {
            int[] x_pos = new int[1], y_pos = new int[1];
            GTK.gtk_window_get_position(shellHandle, x_pos, y_pos);
            GTK.gtk_window_move(shellHandle, x, y);
            /*
             * Bug in GTK: gtk_window_get_position () is not always up-to-date right after
             * gtk_window_move (). The random delays cause problems like bug 445900.
             *
             * The workaround is to wait for the position change to be processed.
             * The limit 1000 is an experimental value. I've seen cases where about 200
             * iterations were necessary.
             */
            for (int i = 0; i < 1000; i++) {
                int[] x2_pos = new int[1], y2_pos = new int[1];
                GTK.gtk_window_get_position(shellHandle, x2_pos, y2_pos);
                if (x2_pos[0] == x && y2_pos[0] == y) {
                    break;
                }
            }
            if (x_pos[0] != x || y_pos[0] != y) {
                moved = true;
                oldX = x;
                oldY = y;
                sendEvent(SWT.Move);
                if (isDisposed())
                    return 0;
                result |= MOVED;
            }
        }
        if (resize) {
            width = Math.max(1, Math.max(minWidth, width - trimWidth()));
            height = Math.max(1, Math.max(minHeight, height - trimHeight()));
            /*
            * If the shell is created without a RESIZE style bit, and the
            * minWidth/minHeight has been set, allow the resize.
            */
            if ((style & SWT.RESIZE) != 0 || (minHeight != 0 || minWidth != 0))
                GTK.gtk_window_resize(shellHandle, width, height);
            boolean changed = width != oldWidth || height != oldHeight;
            if (changed) {
                oldWidth = width;
                oldHeight = height;
                result |= RESIZED;
            }
            resizeBounds(width, height, changed);
        }
        return result;
    }

    @Override
    void setCursor(long cursor) {
        if (GTK.GTK4) {
            if (enableSurface != 0) {
                GDK.gdk_surface_set_cursor(enableSurface, cursor);
            }
        } else {
            if (enableWindow != 0) {
                GDK.gdk_window_set_cursor(enableWindow, cursor);
            }
        }
        super.setCursor(cursor);
    }

    @Override
    public void setEnabled(boolean enabled) {
        checkWidget();
        if (((state & DISABLED) == 0) == enabled)
            return;
        Display display = this.display;
        Control control = null;
        boolean fixFocus = false;
        if (!enabled) {
            if (display.focusEvent != SWT.FocusOut) {
                control = display.getFocusControl();
                fixFocus = isFocusAncestor(control);
            }
        }
        if (enabled) {
            state &= ~DISABLED;
        } else {
            state |= DISABLED;
        }
        enableWidget(enabled);
        if (isDisposed())
            return;
        if (GTK.GTK4) {
            if (enabled) {
                if (enableSurface != 0) {
                    cleanupEnableSurface();
                }
            } else {
                long parentHandle = shellHandle;
                GTK.gtk_widget_realize(parentHandle);
                long surface = gtk_widget_get_surface(parentHandle);
                Rectangle rect = getBoundsInPixels();
                GdkRectangle gdkRectangle = new GdkRectangle();
                gdkRectangle.width = rect.width;
                gdkRectangle.height = rect.height;
                enableSurface = GDK.gdk_surface_new_child(surface, gdkRectangle);
                if (enableSurface != 0) {
                    if (cursor != null) {
                        GDK.gdk_surface_set_cursor(enableSurface, cursor.handle);
                    }
                    GDK.gdk_surface_set_user_data(enableSurface, parentHandle);
                    GDK.gdk_surface_show(enableSurface);
                }
            }
        } else {
            if (enabled) {
                if (enableWindow != 0) {
                    cleanupEnableWindow();
                }
            } else {
                long parentHandle = shellHandle;
                GTK.gtk_widget_realize(parentHandle);
                long window = gtk_widget_get_window(parentHandle);
                Rectangle rect = getBoundsInPixels();
                GdkWindowAttr attributes = new GdkWindowAttr();
                attributes.width = rect.width;
                attributes.height = rect.height;
                attributes.event_mask = (0xFFFFFFFF & ~OS.ExposureMask);
                attributes.wclass = GDK.GDK_INPUT_ONLY;
                attributes.window_type = GDK.GDK_WINDOW_CHILD;
                enableWindow = GDK.gdk_window_new(window, attributes, 0);
                if (enableWindow != 0) {
                    if (cursor != null) {
                        GDK.gdk_window_set_cursor(enableWindow, cursor.handle);
                    }
                    /* 427776: we need to listen to all enter-notify-event signals to
                     * see if this new GdkWindow has been added to a widget's internal
                     * hash table, so when the GdkWindow is destroyed we can also remove
                     * that reference. */
                    if (enterNotifyEventFunc != null)
                        enterNotifyEventId = OS.g_signal_add_emission_hook(enterNotifyEventSignalId, 0,
                                enterNotifyEventFunc.getAddress(), enableWindow, 0);

                    GDK.gdk_window_set_user_data(enableWindow, parentHandle);
                    GDK.gdk_window_show(enableWindow);
                }
            }
        }
        if (fixFocus)
            fixFocus(control);
        if (enabled && display.activeShell == this) {
            if (!restoreFocus())
                traverseGroup(false);
        }
    }

    /**
     * Sets the full screen state of the receiver.
     * If the argument is <code>true</code> causes the receiver
     * to switch to the full screen state, and if the argument is
     * <code>false</code> and the receiver was previously switched
     * into full screen state, causes the receiver to switch back
     * to either the maximized or normal states.
     * <p>
     * Note: The result of intermixing calls to <code>setFullScreen(true)</code>,
     * <code>setMaximized(true)</code> and <code>setMinimized(true)</code> will
     * vary by platform. Typically, the behavior will match the platform user's
     * expectations, but not always. This should be avoided if possible.
     * </p>
     *
     * @param fullScreen the new fullscreen state
     *
     * @exception SWTException <ul>
     *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
     *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
     * </ul>
     *
     * @since 3.4
     */
    public void setFullScreen(boolean fullScreen) {
        checkWidget();
        if (fullScreen) {
            GTK.gtk_window_fullscreen(shellHandle);
        } else {
            GTK.gtk_window_unfullscreen(shellHandle);
            if (maximized) {
                setMaximized(true);
            }
        }
        this.fullScreen = fullScreen;
    }

    /**
     * Sets the input method editor mode to the argument which
     * should be the result of bitwise OR'ing together one or more
     * of the following constants defined in class <code>SWT</code>:
     * <code>NONE</code>, <code>ROMAN</code>, <code>DBCS</code>,
     * <code>PHONETIC</code>, <code>NATIVE</code>, <code>ALPHA</code>.
     *
     * @param mode the new IME mode
     *
     * @exception SWTException <ul>
     *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
     *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
     * </ul>
     *
     * @see SWT
     */
    public void setImeInputMode(int mode) {
        checkWidget();
    }

    @Override
    void setInitialBounds() {
        int width = 0, height = 0;
        if ((state & FOREIGN_HANDLE) != 0) {
            GtkAllocation allocation = new GtkAllocation();
            GTK.gtk_widget_get_allocation(shellHandle, allocation);
            width = allocation.width;
            height = allocation.height;
        } else {
            GdkRectangle dest = new GdkRectangle();
            if (GTK.GTK_VERSION >= OS.VERSION(3, 22, 0)) {
                long display = GDK.gdk_display_get_default();
                if (display != 0) {
                    long monitor;
                    if (GTK.GTK4) {
                        monitor = GDK.gdk_display_get_monitor_at_surface(display, paintSurface());
                    } else {
                        monitor = GDK.gdk_display_get_monitor_at_window(display, paintWindow());
                    }
                    GDK.gdk_monitor_get_geometry(monitor, dest);
                    width = dest.width * 5 / 8;
                    height = dest.height * 5 / 8;
                }
            } else {
                long screen = GDK.gdk_screen_get_default();
                if (screen != 0) {
                    if (GDK.gdk_screen_get_n_monitors(screen) > 1) {
                        int monitorNumber = GDK.gdk_screen_get_monitor_at_window(screen, paintWindow());
                        GDK.gdk_screen_get_monitor_geometry(screen, monitorNumber, dest);
                        width = dest.width * 5 / 8;
                        height = dest.height * 5 / 8;
                    }
                }
            }
            if (width == 0 && height == 0 && !GTK.GTK4) {
                // if the above failed, use gdk_screen_height/width as a fallback
                width = GDK.gdk_screen_width() * 5 / 8;
                height = GDK.gdk_screen_height() * 5 / 8;
            }
            if ((style & SWT.RESIZE) != 0) {
                GTK.gtk_window_resize(shellHandle, width, height);
            }
        }
        resizeBounds(width, height, false);
    }

    @Override
    public void setMaximized(boolean maximized) {
        checkWidget();
        super.setMaximized(maximized);
        if (maximized) {
            GTK.gtk_window_maximize(shellHandle);
        } else {
            GTK.gtk_window_unmaximize(shellHandle);
        }
    }

    @Override
    public void setMenuBar(Menu menu) {
        checkWidget();
        if (menuBar == menu)
            return;
        boolean both = menu != null && menuBar != null;
        if (menu != null) {
            if ((menu.style & SWT.BAR) == 0)
                error(SWT.ERROR_MENU_NOT_BAR);
            if (menu.parent != this)
                error(SWT.ERROR_INVALID_PARENT);
        }
        if (menuBar != null) {
            long menuHandle = menuBar.handle;
            GTK.gtk_widget_hide(menuHandle);
            destroyAccelGroup();
        }
        menuBar = menu;
        if (menuBar != null) {
            long menuHandle = menu.handle;
            GTK.gtk_widget_show(menuHandle);
            createAccelGroup();
            menuBar.addAccelerators(accelGroup);
        }
        GtkAllocation allocation = new GtkAllocation();
        GTK.gtk_widget_get_allocation(vboxHandle, allocation);
        int width = allocation.width;
        int height = allocation.height;
        resizeBounds(width, height, !both);
    }

    @Override
    public void setMinimized(boolean minimized) {
        checkWidget();
        if (this.minimized == minimized)
            return;
        super.setMinimized(minimized);
        if (!GTK.gtk_widget_get_visible(shellHandle)) {
            GTK.gtk_widget_show(shellHandle);
        }
        if (minimized) {
            GTK.gtk_window_iconify(shellHandle);
        } else {
            GTK.gtk_window_deiconify(shellHandle);
            bringToTop(false);
        }
    }

    /**
     * Sets the receiver's minimum size to the size specified by the arguments.
     * If the new minimum size is larger than the current size of the receiver,
     * the receiver is resized to the new minimum size.
     *
     * @param width the new minimum width for the receiver
     * @param height the new minimum height for the receiver
     *
     * @exception SWTException <ul>
     *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
     *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
     * </ul>
     *
     * @since 3.1
     */
    public void setMinimumSize(int width, int height) {
        checkWidget();
        setMinimumSize(new Point(width, height));
    }

    void setMinimumSizeInPixels(int width, int height) {
        checkWidget();
        GdkGeometry geometry = new GdkGeometry();
        minWidth = geometry.min_width = Math.max(width, trimWidth()) - trimWidth();
        minHeight = geometry.min_height = Math.max(height, trimHeight()) - trimHeight();
        GTK.gtk_window_set_geometry_hints(shellHandle, 0, geometry, GDK.GDK_HINT_MIN_SIZE);
    }

    /**
     * Sets the receiver's minimum size to the size specified by the argument.
     * If the new minimum size is larger than the current size of the receiver,
     * the receiver is resized to the new minimum size.
     *
     * @param size the new minimum size for the receiver
     *
     * @exception IllegalArgumentException <ul>
     *    <li>ERROR_NULL_ARGUMENT - if the point is null</li>
     * </ul>
     * @exception SWTException <ul>
     *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
     *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
     * </ul>
     *
     * @since 3.1
     */
    public void setMinimumSize(Point size) {
        checkWidget();
        setMinimumSizeInPixels(DPIUtil.autoScaleUp(size));
    }

    void setMinimumSizeInPixels(Point size) {
        checkWidget();
        if (size == null)
            error(SWT.ERROR_NULL_ARGUMENT);
        setMinimumSizeInPixels(size.x, size.y);
    }

    /**
     * Sets the receiver's modified state as specified by the argument.
     *
     * @param modified the new modified state for the receiver
     *
     * @exception SWTException <ul>
     *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
     *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
     * </ul>
     *
     * @since 3.5
     */
    public void setModified(boolean modified) {
        checkWidget();
        this.modified = modified;
    }

    /**
     * Sets the shape of the shell to the region specified
     * by the argument.  When the argument is null, the
     * default shape of the shell is restored.  The shell
     * must be created with the style SWT.NO_TRIM in order
     * to specify a region.
     * <p>
     * NOTE: This method also sets the size of the shell. Clients should
     * not call {@link #setSize} or {@link #setBounds} on this shell.
     * Furthermore, the passed region should not be modified any more.
     * </p>
     *
     * @param region the region that defines the shape of the shell (or null)
     *
     * @exception IllegalArgumentException <ul>
     *    <li>ERROR_INVALID_ARGUMENT - if the region has been disposed</li>
     * </ul>
     * @exception SWTException <ul>
     *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
     *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
     * </ul>
     *
     * @since 3.0
     */
    @Override
    public void setRegion(Region region) {
        checkWidget();
        if ((style & SWT.NO_TRIM) == 0)
            return;

        if (region != null) {
            Rectangle bounds = region.getBounds();
            setSize(bounds.x + bounds.width, bounds.y + bounds.height);
        }
        Region regionToDispose = null;
        if ((style & SWT.RIGHT_TO_LEFT) != 0) {
            if (originalRegion != null)
                regionToDispose = this.region;
            originalRegion = region;
            region = mirrorRegion(region);
        } else {
            originalRegion = null;
        }
        super.setRegion(region);
        if (regionToDispose != null)
            regionToDispose.dispose();
    }

    //copied from Region:
    static void gdk_region_get_rectangles(long region, long[] rectangles, int[] n_rectangles) {
        int num = Cairo.cairo_region_num_rectangles(region);
        if (n_rectangles != null)
            n_rectangles[0] = num;
        rectangles[0] = OS.g_malloc(GdkRectangle.sizeof * num);
        for (int n = 0; n < num; n++) {
            Cairo.cairo_region_get_rectangle(region, n, rectangles[0] + (n * GdkRectangle.sizeof));
        }
    }

    static Region mirrorRegion(Region region) {
        if (region == null)
            return null;

        Region mirrored = new Region(region.getDevice());

        long rgn = region.handle;
        int[] nRects = new int[1];
        long[] rects = new long[1];
        gdk_region_get_rectangles(rgn, rects, nRects);
        Rectangle bounds = DPIUtil.autoScaleUp(region.getBounds());
        cairo_rectangle_int_t rect = new cairo_rectangle_int_t();
        for (int i = 0; i < nRects[0]; i++) {
            Cairo.memmove(rect, rects[0] + (i * GdkRectangle.sizeof), GdkRectangle.sizeof);
            rect.x = bounds.x + bounds.width - rect.x - rect.width;
            Cairo.cairo_region_union_rectangle(mirrored.handle, rect);
        }
        if (rects[0] != 0)
            OS.g_free(rects[0]);
        return mirrored;
    }

    /*
     * Shells are never labelled by other widgets, so no initialization is needed.
     */
    @Override
    void setRelations() {
    }

    @Override
    public void setText(String string) {
        super.setText(string);

        /*
        * GTK bug 82013.  For some reason, if the title string
        * is less than 7 bytes long and is not terminated by
        * a space, some window managers occasionally draw
        * garbage after the last character in  the title.
        * The fix is to pad the title.
        */
        int length = string.length();
        char[] chars = new char[Math.max(6, length) + 1];
        string.getChars(0, length, chars, 0);
        for (int i = length; i < chars.length; i++)
            chars[i] = ' ';
        byte[] buffer = Converter.wcsToMbcs(chars, true);
        GTK.gtk_window_set_title(shellHandle, buffer);
    }

    @Override
    public void setVisible(boolean visible) {
        checkWidget();

        if (moved) { //fix shell location if it was moved.
            setLocationInPixels(oldX, oldY);
        }
        int mask = SWT.PRIMARY_MODAL | SWT.APPLICATION_MODAL | SWT.SYSTEM_MODAL;
        if ((style & mask) != 0) {
            if (visible) {
                display.setModalShell(this);
                GTK.gtk_window_set_modal(shellHandle, true);
            } else {
                display.clearModal(this);
                GTK.gtk_window_set_modal(shellHandle, false);
            }
            /*
             * When in full-screen mode, the OS will always consider it to be the top of the display stack unless it is a dialog.
             * This fix will give modal windows dialog-type priority if the parent is in full-screen, allowing it to be popped
             * up in front of the full-screen window.
             */
            if (parent != null && parent.getShell().getFullScreen()) {
                GTK.gtk_window_set_type_hint(shellHandle, GDK.GDK_WINDOW_TYPE_HINT_DIALOG);
            }
        } else {
            updateModal();
        }
        showWithParent = visible;
        if (GTK.gtk_widget_get_mapped(shellHandle) == visible)
            return;
        if (visible) {
            if (center && !moved) {
                center();
                if (isDisposed())
                    return;
            }
            sendEvent(SWT.Show);
            if (isDisposed())
                return;

            /*
            * In order to ensure that the shell is visible
            * and fully painted, dispatch events such as
            * GDK_MAP and GDK_CONFIGURE, until the GDK_MAP
            * event for the shell is received.
            *
            * Note that if the parent is minimized or withdrawn
            * from the desktop, this should not be done since
            * the shell not will be mapped until the parent is
            * unminimized or shown on the desktop.
            */
            mapped = false;
            /*
             * Bug/Feature in GTK: calling gtk_widget_show for the first time before
             * gtk_widget_resize assumes the initial default size for any subsequent calls
             * to gtk_widget_move. This causes issue with shell.setBounds where the
             * location can only be moved to a limited bound on the screen corresponding
             * to the default size by the window manager, even when the new resized shell
             * is smaller and is able to move to further x, y position without being cutoff by
             * the screen. The fix is to set the default size to the smallest possible (1, 1)
             * before gtk_widget_show.
             */
            if (oldWidth == 0 && oldHeight == 0) {
                int[] init_width = new int[1], init_height = new int[1];
                GTK.gtk_window_get_size(shellHandle, init_width, init_height);
                GTK.gtk_window_resize(shellHandle, 1, 1);
                GTK.gtk_widget_show(shellHandle);
                GTK.gtk_window_resize(shellHandle, init_width[0], init_height[0]);
                resizeBounds(init_width[0], init_height[0], false);
            } else {
                GTK.gtk_widget_show(shellHandle);
            }
            /**
             *  Feature in GTK: This handles grabbing the keyboard focus from a SWT.ON_TOP window
             *  if it has editable fields and is running Wayland. Refer to bug 515773.
             */
            if (GTK.GTK4) {
                if (enableSurface != 0)
                    GDK.gdk_surface_raise(enableSurface);
            } else {
                if (enableWindow != 0)
                    GDK.gdk_window_raise(enableWindow);
            }
            if (isDisposed())
                return;
            if (!(OS.isX11() && GTK.GTK_IS_PLUG(shellHandle))) {
                if (GTK.GTK4) {
                    display.dispatchEvents = new int[] { GDK.GDK4_EXPOSE, GDK.GDK4_FOCUS_CHANGE, GDK.GDK4_CONFIGURE,
                            GDK.GDK4_MAP, GDK.GDK4_UNMAP, };
                } else {
                    display.dispatchEvents = new int[] { GDK.GDK_EXPOSE, GDK.GDK_FOCUS_CHANGE, GDK.GDK_CONFIGURE,
                            GDK.GDK_MAP, GDK.GDK_UNMAP, GDK.GDK_NO_EXPOSE, GDK.GDK_WINDOW_STATE };
                }
                Display display = this.display;
                display.putGdkEvents();
                boolean iconic = false;
                Shell shell = parent != null ? parent.getShell() : null;
                do {
                    /*
                    * This call to gdk_threads_leave() is a temporary work around
                    * to avoid deadlocks when gdk_threads_init() is called by native
                    * code outside of SWT (i.e AWT, etc). It ensures that the current
                    * thread leaves the GTK lock before calling the function below.
                    */
                    if (!GTK.GTK4)
                        GDK.gdk_threads_leave();
                    OS.g_main_context_iteration(0, false);
                    if (isDisposed())
                        break;
                    iconic = minimized || (shell != null && shell.minimized);
                } while (!mapped && !iconic);
                display.dispatchEvents = null;
                if (isDisposed())
                    return;
                if (!iconic) {
                    update(true, true);
                    if (isDisposed())
                        return;
                    adjustTrim();
                }
            }
            mapped = true;

            if ((style & mask) != 0) {
                gdk_pointer_ungrab(GTK.gtk_widget_get_window(shellHandle), GDK.GDK_CURRENT_TIME);
            }
            opened = true;
            if (!moved) {
                moved = true;
                Point location = getLocationInPixels();
                oldX = location.x;
                oldY = location.y;
                sendEvent(SWT.Move);
                if (isDisposed())
                    return;
            }
            if (!resized) {
                resized = true;
                Point size = getSizeInPixels();
                oldWidth = size.x - trimWidth();
                oldHeight = size.y - trimHeight();
                sendEvent(SWT.Resize);
                if (isDisposed())
                    return;
                if (layout != null) {
                    markLayout(false, false);
                    updateLayout(false);
                }
            }
        } else {
            fixActiveShell();
            checkAndUnrabFocus();
            GTK.gtk_widget_hide(shellHandle);
            sendEvent(SWT.Hide);
        }
    }

    @Override
    void setZOrder(Control sibling, boolean above, boolean fixRelations) {
        /*
        * Bug in GTK+.  Changing the toplevel window Z-order causes
        * X to send a resize event.  Before the shell is mapped, these
        * resize events always have a size of 200x200, causing extra
        * layout work to occur.  The fix is to modify the Z-order only
        * if the shell has already been mapped at least once.
        */
        /* Shells are never included in labelled-by relations */
        if (mapped)
            setZOrder(sibling, above, false, false);
    }

    @Override
    long shellMapProc(long handle, long arg0, long user_data) {
        mapped = true;
        display.dispatchEvents = null;
        return 0;
    }

    @Override
    void showWidget() {
        if ((state & FOREIGN_HANDLE) != 0) {
            /*
            * In case of foreign handles, activeShell might not be initialised as
            * no focusIn events are generated on the window until the window loses
            * and gain focus.
            */
            if (GTK.gtk_window_is_active(shellHandle)) {
                display.activeShell = this;
                display.activePending = true;
            }
            long children = GTK.gtk_container_get_children(shellHandle), list = children;
            while (list != 0) {
                GTK.gtk_container_remove(shellHandle, OS.g_list_data(list));
                list = OS.g_list_next(list);
            }
            OS.g_list_free(list);
        }
        GTK.gtk_container_add(shellHandle, vboxHandle);
        if (scrolledHandle != 0)
            GTK.gtk_widget_show(scrolledHandle);
        if (handle != 0)
            GTK.gtk_widget_show(handle);
        if (vboxHandle != 0)
            GTK.gtk_widget_show(vboxHandle);
    }

    @Override
    long sizeAllocateProc(long handle, long arg0, long user_data) {
        int offset = 16;
        int[] x = new int[1], y = new int[1];
        if (GTK.GTK4) {
            /*
             * TODO: calling gdk_window_get_device_position() with a 0
             * for the GdkWindow uses gdk_get_default_root_window(),
             * which doesn't exist on GTK4.
             */
        } else {
            display.gdk_window_get_device_position(0, x, y, null);
        }
        y[0] += offset;
        GdkRectangle dest = new GdkRectangle();
        if (GTK.GTK_VERSION >= OS.VERSION(3, 22, 0)) {
            long display = GDK.gdk_display_get_default();
            long monitor = GDK.gdk_display_get_monitor_at_point(display, x[0], y[0]);
            GDK.gdk_monitor_get_geometry(monitor, dest);
        } else {
            long screen = GDK.gdk_screen_get_default();
            if (screen != 0) {
                int monitorNumber = GDK.gdk_screen_get_monitor_at_point(screen, x[0], y[0]);
                GDK.gdk_screen_get_monitor_geometry(screen, monitorNumber, dest);
            }
        }
        GtkAllocation allocation = new GtkAllocation();
        GTK.gtk_widget_get_allocation(handle, allocation);
        int width = allocation.width;
        int height = allocation.height;
        if (x[0] + width > dest.x + dest.width) {
            x[0] = (dest.x + dest.width) - width;
        }
        if (y[0] + height > dest.y + dest.height) {
            y[0] = (dest.y + dest.height) - height;
        }
        GTK.gtk_window_move(handle, x[0], y[0]);
        return 0;
    }

    @Override
    long sizeRequestProc(long handle, long arg0, long user_data) {
        GTK.gtk_widget_hide(handle);
        return 0;
    }

    @Override
    boolean traverseEscape() {
        if (parent == null)
            return false;
        if (!isVisible() || !isEnabled())
            return false;
        close();
        return true;
    }

    int trimHeight() {
        if ((style & SWT.NO_TRIM) != 0)
            return 0;
        if (fullScreen)
            return 0;
        // Shells with both ON_TOP and RESIZE set only use border, not trim.
        // See bug 319612.
        if (isCustomResize())
            return 0;
        boolean hasTitle = false, hasResize = false, hasBorder = false;
        hasTitle = (style & (SWT.MIN | SWT.MAX | SWT.TITLE | SWT.MENU)) != 0;
        hasResize = (style & SWT.RESIZE) != 0;
        hasBorder = (style & SWT.BORDER) != 0;
        if (hasTitle) {
            if (hasResize)
                return display.trimHeights[Display.TRIM_TITLE_RESIZE];
            if (hasBorder)
                return display.trimHeights[Display.TRIM_TITLE_BORDER];
            return display.trimHeights[Display.TRIM_TITLE];
        }
        if (hasResize)
            return display.trimHeights[Display.TRIM_RESIZE];
        if (hasBorder)
            return display.trimHeights[Display.TRIM_BORDER];
        return display.trimHeights[Display.TRIM_NONE];
    }

    int trimWidth() {
        if ((style & SWT.NO_TRIM) != 0)
            return 0;
        if (fullScreen)
            return 0;
        // Shells with both ON_TOP and RESIZE set only use border, not trim.
        // See bug 319612.
        if (isCustomResize())
            return 0;
        boolean hasTitle = false, hasResize = false, hasBorder = false;
        hasTitle = (style & (SWT.MIN | SWT.MAX | SWT.TITLE | SWT.MENU)) != 0;
        hasResize = (style & SWT.RESIZE) != 0;
        hasBorder = (style & SWT.BORDER) != 0;
        if (hasTitle) {
            if (hasResize)
                return display.trimWidths[Display.TRIM_TITLE_RESIZE];
            if (hasBorder)
                return display.trimWidths[Display.TRIM_TITLE_BORDER];
            return display.trimWidths[Display.TRIM_TITLE];
        }
        if (hasResize)
            return display.trimWidths[Display.TRIM_RESIZE];
        if (hasBorder)
            return display.trimWidths[Display.TRIM_BORDER];
        return display.trimWidths[Display.TRIM_NONE];
    }

    void updateModal() {
        if (OS.isX11() && GTK.GTK_IS_PLUG(shellHandle))
            return;
        long group = 0;
        boolean isModalShell = false;
        if (display.getModalDialog() == null) {
            Shell modal = getModalShell();
            int mask = SWT.PRIMARY_MODAL | SWT.APPLICATION_MODAL | SWT.SYSTEM_MODAL;
            Composite shell = null;
            if (modal == null) {
                if ((style & mask) != 0) {
                    shell = this;
                    /*
                    * Feature in GTK. If a modal shell is reassigned to
                    * a different group, then it's modal state is not.
                    * persisted against the new group.
                    * The fix is to reset the modality before it is changed
                    * into a different group and then, set back after it
                    * assigned into new group.
                    */
                    isModalShell = GTK.gtk_window_get_modal(shellHandle);
                    if (isModalShell)
                        GTK.gtk_window_set_modal(shellHandle, false);
                }
            } else {
                shell = modal;
            }
            Composite topModalShell = shell;
            while (shell != null) {
                if ((shell.style & mask) == 0) {
                    group = shell.getShell().group;
                    break;
                }
                topModalShell = shell;
                shell = shell.parent;
            }
            /*
            * If a modal shell doesn't have any parent (or modal shell as it's parent),
            * then we incorrectly add the modal shell to the default group, due to which
            * children of that modal shell are not interactive. The fix is to ensure
            * that whenever there is a modal shell in the hierarchy, then we always
            * add the modal shell's group to that modal shell and it's modelless children
            * in a different group.
            */
            if (group == 0 && topModalShell != null)
                group = topModalShell.getShell().group;
        }
        if (group == 0) {
            /*
            * Feature in GTK. Starting with GTK version 2.10, GTK
            * doesn't assign windows to a default group. The fix is to
            * get the handle of the default group and add windows to the
            * group.
            */
            group = GTK.gtk_window_get_group(0);
        }
        if (group != 0) {
            GTK.gtk_window_group_add_window(group, shellHandle);
            if (isModalShell)
                GTK.gtk_window_set_modal(shellHandle, true);
        } else {
            if (modalGroup != 0) {
                GTK.gtk_window_group_remove_window(modalGroup, shellHandle);
            }
        }
        modalGroup = group;
    }

    void updateMinimized(boolean minimized) {
        Shell[] shells = getShells();
        for (int i = 0; i < shells.length; i++) {
            boolean update = false;
            Shell shell = shells[i];
            while (shell != null && shell != this && !shell.isUndecorated()) {
                shell = (Shell) shell.getParent();
            }
            if (shell != null && shell != this)
                update = true;
            if (update) {
                if (minimized) {
                    if (shells[i].isVisible()) {
                        shells[i].showWithParent = true;
                        GTK.gtk_widget_hide(shells[i].shellHandle);
                    }
                } else {
                    if (shells[i].showWithParent) {
                        shells[i].showWithParent = false;
                        GTK.gtk_widget_show(shells[i].shellHandle);
                    }
                }
            }
        }
    }

    @Override
    void deregister() {
        super.deregister();
        Widget disposed = display.removeWidget(shellHandle);
        if (shellHandle != 0 && !(disposed instanceof Shell)) {
            SWT.error(SWT.ERROR_INVALID_RETURN_VALUE, null, ". Wrong widgetTable entry: " + disposed
                    + " removed for shell: " + this + display.dumpWidgetTableInfo());
        }
        if (Display.strictChecks) {
            Shell[] shells = display.getShells();
            for (Shell shell : shells) {
                if (shell == this) {
                    SWT.error(SWT.ERROR_INVALID_RETURN_VALUE, null,
                            ". Disposed shell still in the widgetTable: " + this + display.dumpWidgetTableInfo());
                }
            }
        }
    }

    boolean requiresUngrab() {
        return !OS.isX11() && GTK.GTK_VERSION >= OS.VERSION(3, 20, 0) && (style & SWT.ON_TOP) != 0
                && (style & SWT.NO_FOCUS) == 0;
    }

    /**
     * SWT.ON_TOP shells on Wayland requires gdk_seat_grab to grab keyboard/input focus,
     * the grabbed focus need to be removed when Shell is disposed/hidden.
     */
    void checkAndUnrabFocus() {
        /*
         * Bug 515773, 542104: Wayland POPUP window limitations
         * In bringToTop(), we grabbed keyboard/pointer focus to popup shell, which needs to
         * be ungrabbed when the Shell is disposed. There are two cases here:
         *
         * 1) If the popup shell is a regular popup window attached to a toplevel window,
         * like Javadoc popup, we can just ungrab the window.
         *
         * 2) If the popup shell is attached to another popup, like auto-completion details,
         * ungrabbing the focus will also remove the grab for its parent. (To see this,
         * focus on the completion details page using Tab and hit Esc makes the parent
         * completion list disposed as well.) To deal with this, we should not ungrab focus
         * for child popup shells so that focus is restored to the parent popup when the child
         * is disposed.
         * **NOTE**: Not ungrabbing focus for child popup restores focus to parent popup
         * assumes that GdkSeat are the same for parent and child, which seems to be the case.
         */
        if (requiresUngrab() && !isMappedToPopup() && grabbedFocus) {
            long gdkResource, display;
            if (GTK.GTK4) {
                gdkResource = gtk_widget_get_surface(shellHandle);
                display = GDK.gdk_surface_get_display(gdkResource);
            } else {
                gdkResource = gtk_widget_get_window(shellHandle);
                display = GDK.gdk_window_get_display(gdkResource);
            }
            long seat = GDK.gdk_display_get_default_seat(display);
            GDK.gdk_seat_ungrab(seat);
            GTK.gtk_grab_remove(shellHandle);
            grabbedFocus = false;
        }
    }

    @Override
    public void dispose() {
        /*
        * Note:  It is valid to attempt to dispose a widget
        * more than once.  If this happens, fail silently.
        */
        if (isDisposed())
            return;
        fixActiveShell();
        checkAndUnrabFocus();
        /*
         * Bug 540166: Dispose the popup child if any when the parent is disposed so that
         * it does not remain open forever.
         */
        if (popupChild != null && popupChild.shellHandle != 0 && !popupChild.isDisposed()) {
            popupChild.dispose();
        }
        GTK.gtk_widget_hide(shellHandle);
        super.dispose();
    }

    /**
     * If the receiver is visible, moves it to the top of the
     * drawing order for the display on which it was created
     * (so that all other shells on that display, which are not
     * the receiver's children will be drawn behind it) and forces
     * the window manager to make the shell active.
     *
     * @exception SWTException <ul>
     *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
     *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
     * </ul>
     *
     * @since 2.0
     * @see Control#moveAbove
     * @see Control#setFocus
     * @see Control#setVisible
     * @see Display#getActiveShell
     * @see Decorations#setDefaultButton(Button)
     * @see Shell#open
     * @see Shell#setActive
     */
    public void forceActive() {
        checkWidget();
        bringToTop(true);
    }

    @Override
    Rectangle getBoundsInPixels() {
        checkWidget();
        int[] x = new int[1], y = new int[1];
        if ((state & Widget.DISPOSE_SENT) == 0) {
            GTK.gtk_window_get_position(shellHandle, x, y);
        } else {
            if (GTK.GTK4) {
                GDK.gdk_surface_get_root_origin(GTK.gtk_widget_get_surface(shellHandle), x, y);
            } else {
                GDK.gdk_window_get_root_origin(GTK.gtk_widget_get_window(shellHandle), x, y);
            }
        }
        GtkAllocation allocation = new GtkAllocation();
        GTK.gtk_widget_get_allocation(vboxHandle, allocation);
        int width = allocation.width;
        int height = allocation.height;
        int border = 0;
        if ((style & (SWT.NO_TRIM | SWT.BORDER | SWT.SHELL_TRIM)) == 0 || isCustomResize()) {
            border = gtk_container_get_border_width_or_margin(shellHandle);
        }
        return new Rectangle(x[0], y[0], width + trimWidth() + 2 * border, height + trimHeight() + 2 * border);
    }

    @Override
    void releaseHandle() {
        super.releaseHandle();
        shellHandle = 0;
    }

    @Override
    void releaseChildren(boolean destroy) {
        Shell[] shells = getShells();
        for (int i = 0; i < shells.length; i++) {
            Shell shell = shells[i];
            if (shell != null && !shell.isDisposed()) {
                shell.release(false);
            }
        }
        if (toolTips != null) {
            for (int i = 0; i < toolTips.length; i++) {
                ToolTip toolTip = toolTips[i];
                if (toolTip != null && !toolTip.isDisposed()) {
                    toolTip.dispose();
                }
            }
            toolTips = null;
        }
        super.releaseChildren(destroy);
    }

    @Override
    void releaseWidget() {
        Region regionToDispose = null;
        if (originalRegion != null)
            regionToDispose = region;
        super.releaseWidget();
        destroyAccelGroup();
        display.clearModal(this);
        if (display.activeShell == this)
            display.activeShell = null;
        if (tooltipsHandle != 0)
            OS.g_object_unref(tooltipsHandle);
        tooltipsHandle = 0;
        if (group != 0)
            OS.g_object_unref(group);
        group = modalGroup = 0;
        lastActive = null;
        if (regionToDispose != null) {
            regionToDispose.dispose();
        }
    }

    void setToolTipText(long tipWidget, String string) {
        setToolTipText(tipWidget, tipWidget, string);
    }

    void setToolTipText(long rootWidget, long tipWidget, String string) {
        byte[] buffer = null;
        if (string != null && string.length() > 0) {
            char[] chars = fixMnemonic(string, false, true);
            buffer = Converter.wcsToMbcs(chars, true);
        }
        long oldTooltip = GTK.gtk_widget_get_tooltip_text(rootWidget);
        boolean same = false;
        if (buffer == null && oldTooltip == 0) {
            same = true;
        } else if (buffer != null && oldTooltip != 0) {
            same = OS.strcmp(oldTooltip, buffer) == 0;
        }
        if (oldTooltip != 0)
            OS.g_free(oldTooltip);
        if (same)
            return;

        GTK.gtk_widget_set_tooltip_text(rootWidget, buffer);
    }

    @Override
    Point getWindowOrigin() {
        if (!mapped) {
            /*
             * Special case: The handle attributes are not initialized until the
             * shell is made visible, so gdk_window_get_origin () always returns {0, 0}.
             *
             * Once the shell is realized, gtk_window_get_position () includes
             * window trims etc. from the window manager. That's why getLocation ()
             * is not safe to use for coordinate mappings after the shell has been made visible.
             */
            return getLocationInPixels();
        }
        return super.getWindowOrigin();
    }

    @Override
    Point getSurfaceOrigin() {
        if (!mapped) {
            return getLocationInPixels();
        }
        return super.getSurfaceOrigin();
    }

}