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

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/*******************************************************************************
 * Copyright (c) 2000, 2019 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 java.io.*;

import org.eclipse.swt.*;
import org.eclipse.swt.internal.*;
import org.eclipse.swt.internal.gtk.*;

/**
 * Instances of this class allow the user to navigate
 * the file system and select or enter a file name.
 * <dl>
 * <dt><b>Styles:</b></dt>
 * <dd>SAVE, OPEN, MULTI</dd>
 * <dt><b>Events:</b></dt>
 * <dd>(none)</dd>
 * </dl>
 * <p>
 * Note: Only one of the styles SAVE and OPEN may be specified.
 * </p><p>
 * IMPORTANT: This class is <em>not</em> intended to be subclassed.
 * </p>
 *
 * @see <a href="http://www.eclipse.org/swt/snippets/#filedialog">FileDialog snippets</a>
 * @see <a href="http://www.eclipse.org/swt/examples.php">SWT Example: ControlExample, Dialog tab</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 FileDialog extends Dialog {
    String[] filterNames = new String[0];
    String[] filterExtensions = new String[0];
    String filterPath = "";
    String fileName = "";
    String[] fileNames = new String[0];
    String fullPath = "";
    int filterIndex = -1;
    boolean overwrite = false;
    boolean uriMode;
    long handle;
    static final char SEPARATOR = File.separatorChar;
    static final char EXTENSION_SEPARATOR = ';';
    static final char FILE_EXTENSION_SEPARATOR = '.';

    /**
     * Constructs a new instance of this class given only its parent.
     *
     * @param parent a shell which will be the parent of the new instance
     *
     * @exception IllegalArgumentException <ul>
     *    <li>ERROR_NULL_ARGUMENT - if the parent is null</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 FileDialog(Shell parent) {
        this(parent, SWT.APPLICATION_MODAL);
    }

    /**
     * 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>
     *
     * @param parent a shell which will be the parent of the new instance
     * @param style the style of dialog to construct
     *
     * @exception IllegalArgumentException <ul>
     *    <li>ERROR_NULL_ARGUMENT - if the parent is null</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#SAVE
     * @see SWT#OPEN
     * @see SWT#MULTI
     */
    public FileDialog(Shell parent, int style) {
        super(parent, checkStyle(parent, style));
        checkSubclass();
    }

    String computeResultChooserDialog() {
        /* MULTI is only valid if the native dialog's action is Open */
        fullPath = null;
        if ((style & SWT.MULTI) != 0) {
            long list = 0;
            if (uriMode) {
                list = GTK.gtk_file_chooser_get_uris(handle);
            } else {
                list = GTK.gtk_file_chooser_get_filenames(handle);
            }
            int listLength = OS.g_slist_length(list);
            fileNames = new String[listLength];
            long current = list;
            int writePos = 0;
            for (int i = 0; i < listLength; i++) {
                long name = OS.g_slist_data(current);
                long utf8Ptr = 0;
                if (uriMode) {
                    utf8Ptr = name;
                } else {
                    utf8Ptr = OS.g_filename_to_utf8(name, -1, null, null, null);
                    if (utf8Ptr == 0)
                        utf8Ptr = OS.g_filename_display_name(name);
                }
                if (name != utf8Ptr)
                    OS.g_free(name);
                if (utf8Ptr != 0) {
                    long[] items_written = new long[1];
                    long utf16Ptr = OS.g_utf8_to_utf16(utf8Ptr, -1, null, items_written, null);
                    OS.g_free(utf8Ptr);
                    if (utf16Ptr != 0) {
                        int clength = (int) items_written[0];
                        char[] chars = new char[clength];
                        C.memmove(chars, utf16Ptr, clength * 2);
                        OS.g_free(utf16Ptr);
                        fullPath = new String(chars);
                        fileNames[writePos++] = fullPath.substring(fullPath.lastIndexOf(SEPARATOR) + 1);
                    }
                }
                current = OS.g_slist_next(current);
            }
            if (writePos != 0 && writePos != listLength) {
                String[] validFileNames = new String[writePos];
                System.arraycopy(fileNames, 0, validFileNames, 0, writePos);
                fileNames = validFileNames;
            }
            OS.g_slist_free(list);
        } else {
            long utf8Ptr = 0;
            if (uriMode) {
                utf8Ptr = GTK.gtk_file_chooser_get_uri(handle);
            } else {
                long path = GTK.gtk_file_chooser_get_filename(handle);
                if (path != 0) {
                    utf8Ptr = OS.g_filename_to_utf8(path, -1, null, null, null);
                    if (utf8Ptr == 0)
                        utf8Ptr = OS.g_filename_display_name(path);
                    if (path != utf8Ptr)
                        OS.g_free(path);
                }
            }
            if (utf8Ptr != 0) {
                long[] items_written = new long[1];
                long utf16Ptr = OS.g_utf8_to_utf16(utf8Ptr, -1, null, items_written, null);
                OS.g_free(utf8Ptr);
                if (utf16Ptr != 0) {
                    int clength = (int) items_written[0];
                    char[] chars = new char[clength];
                    C.memmove(chars, utf16Ptr, clength * 2);
                    OS.g_free(utf16Ptr);
                    fullPath = new String(chars);
                    fileNames = new String[1];
                    fileNames[0] = fullPath.substring(fullPath.lastIndexOf(SEPARATOR) + 1);
                }
            }
        }
        filterIndex = -1;
        long filter = GTK.gtk_file_chooser_get_filter(handle);
        if (filter != 0) {
            long filterNamePtr = GTK.gtk_file_filter_get_name(filter);
            if (filterNamePtr != 0) {
                int length = C.strlen(filterNamePtr);
                byte[] buffer = new byte[length];
                C.memmove(buffer, filterNamePtr, length);
                //OS.g_free (filterNamePtr); //GTK owns this pointer - do not free
                String filterName = new String(Converter.mbcsToWcs(buffer));
                for (int i = 0; i < filterExtensions.length; i++) {
                    if (filterNames.length > 0) {
                        if (filterNames[i].equals(filterName)) {
                            filterIndex = i;
                            break;
                        }
                    } else {
                        if (filterExtensions[i].equals(filterName)) {
                            filterIndex = i;
                            break;
                        }
                    }
                }
            }
        }
        if (fullPath != null) {
            int separatorIndex = fullPath.lastIndexOf(SEPARATOR);
            fileName = fullPath.substring(separatorIndex + 1);
            filterPath = fullPath.substring(0, separatorIndex);
        }
        return fullPath;
    }

    /**
     * Returns the path of the first file that was
     * selected in the dialog relative to the filter path, or an
     * empty string if no such file has been selected.
     *
     * @return the relative path of the file
     */
    public String getFileName() {
        return fileName;
    }

    /**
     * Returns a (possibly empty) array with the paths of all files
     * that were selected in the dialog relative to the filter path.
     *
     * @return the relative paths of the files
     */
    public String[] getFileNames() {
        return fileNames;
    }

    /**
     * Returns the file extensions which the dialog will
     * use to filter the files it shows.
     *
     * @return the file extensions filter
     */
    public String[] getFilterExtensions() {
        return filterExtensions;
    }

    /**
     * Get the 0-based index of the file extension filter
     * which was selected by the user, or -1 if no filter
     * was selected.
     * <p>
     * This is an index into the FilterExtensions array and
     * the FilterNames array.
     * </p>
     *
     * @return index the file extension filter index
     *
     * @see #getFilterExtensions
     * @see #getFilterNames
     *
     * @since 3.4
     */
    public int getFilterIndex() {
        return filterIndex;
    }

    /**
     * Returns the names that describe the filter extensions
     * which the dialog will use to filter the files it shows.
     *
     * @return the list of filter names
     */
    public String[] getFilterNames() {
        return filterNames;
    }

    /**
     * Returns the directory path that the dialog will use, or an empty
     * string if this is not set.  File names in this path will appear
     * in the dialog, filtered according to the filter extensions.
     *
     * @return the directory path string
     *
     * @see #setFilterExtensions
     */
    public String getFilterPath() {
        return filterPath;
    }

    /**
     * Returns the flag that the dialog will use to
     * determine whether to prompt the user for file
     * overwrite if the selected file already exists.
     *
     * @return true if the dialog will prompt for file overwrite, false otherwise
     *
     * @since 3.4
     */
    public boolean getOverwrite() {
        return overwrite;
    }

    /**
     * Makes the dialog visible and brings it to the front
     * of the display.
     *
     * @return a string describing the absolute path of the first selected file,
     *         or null if the dialog was cancelled or an error occurred
     *
     * @exception SWTException <ul>
     *    <li>ERROR_WIDGET_DISPOSED - if the dialog has been disposed</li>
     *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the dialog</li>
     * </ul>
     */
    public String open() {
        if (GTK.GTK_VERSION >= OS.VERSION(3, 20, 0)) {
            return openNativeChooserDialog();
        } else {
            return openChooserDialog();
        }
    }

    /**
     * Open the file chooser dialog using the GtkFileChooserNative API (GTK3.20+) for running applications
     * without direct filesystem access (such as Flatpak). API for GtkFileChoosernative does not
     * give access to any GtkWindow or GtkWidget for the dialog, thus this method omits calls that
     * requires such access. These are be handled by the GtkNativeDialog API.
     *
     * @return a string describing the absolute path of the first selected file, or null
     */
    String openNativeChooserDialog() {
        assert GTK.GTK_VERSION >= OS.VERSION(3, 20, 0);
        byte[] titleBytes = Converter.wcsToMbcs(title, true);
        int action = (style & SWT.SAVE) != 0 ? GTK.GTK_FILE_CHOOSER_ACTION_SAVE : GTK.GTK_FILE_CHOOSER_ACTION_OPEN;
        long shellHandle = parent.topHandle();
        Display display = parent != null ? parent.getDisplay() : Display.getCurrent();
        handle = GTK.gtk_file_chooser_native_new(titleBytes, shellHandle, action, null, null);
        if (handle == 0)
            error(SWT.ERROR_NO_HANDLES);

        if (uriMode) {
            GTK.gtk_file_chooser_set_local_only(handle, false);
        }
        presetChooserDialog();
        display.addIdleProc();
        String answer = null;
        int signalId = 0;
        long hookId = 0;
        if ((style & SWT.RIGHT_TO_LEFT) != 0) {
            signalId = OS.g_signal_lookup(OS.map, GTK.GTK_TYPE_WIDGET());
            hookId = OS.g_signal_add_emission_hook(signalId, 0, display.emissionProc, handle, 0);
        }
        display.sendPreExternalEventDispatchEvent();
        int response = 0;
        response = GTK.gtk_native_dialog_run(handle);
        /*
        * 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 acquired by the function above.
        */
        if (!GTK.GTK4)
            GDK.gdk_threads_leave();
        display.sendPostExternalEventDispatchEvent();
        if ((style & SWT.RIGHT_TO_LEFT) != 0) {
            OS.g_signal_remove_emission_hook(signalId, hookId);
        }
        if (response == GTK.GTK_RESPONSE_ACCEPT) {
            answer = computeResultChooserDialog();
        }
        display.removeIdleProc();
        return answer;
    }

    String openChooserDialog() {
        byte[] titleBytes = Converter.wcsToMbcs(title, true);
        int action = (style & SWT.SAVE) != 0 ? GTK.GTK_FILE_CHOOSER_ACTION_SAVE : GTK.GTK_FILE_CHOOSER_ACTION_OPEN;
        long shellHandle = parent.topHandle();
        Display display = parent != null ? parent.getDisplay() : Display.getCurrent();
        if (display.getDismissalAlignment() == SWT.RIGHT) {
            handle = GTK.gtk_file_chooser_dialog_new(titleBytes, shellHandle, action, GTK.GTK_NAMED_LABEL_CANCEL,
                    GTK.GTK_RESPONSE_CANCEL, GTK.GTK_NAMED_LABEL_OK, GTK.GTK_RESPONSE_OK, 0);
        } else {
            handle = GTK.gtk_file_chooser_dialog_new(titleBytes, shellHandle, action, GTK.GTK_NAMED_LABEL_OK,
                    GTK.GTK_RESPONSE_OK, GTK.GTK_NAMED_LABEL_CANCEL, GTK.GTK_RESPONSE_CANCEL, 0);
        }
        if (handle == 0)
            error(SWT.ERROR_NO_HANDLES);
        GTK.gtk_window_set_modal(handle, true);
        long group = GTK.gtk_window_get_group(0);
        GTK.gtk_window_group_add_window(group, handle);
        long pixbufs = GTK.gtk_window_get_icon_list(shellHandle);
        if (pixbufs != 0) {
            GTK.gtk_window_set_icon_list(handle, pixbufs);
            OS.g_list_free(pixbufs);
        }
        if (uriMode) {
            GTK.gtk_file_chooser_set_local_only(handle, false);
        }
        presetChooserDialog();
        display.addIdleProc();
        String answer = null;
        Dialog oldModal = null;
        if (GTK.gtk_window_get_modal(handle)) {
            oldModal = display.getModalDialog();
            display.setModalDialog(this);
        }
        int signalId = 0;
        long hookId = 0;
        if ((style & SWT.RIGHT_TO_LEFT) != 0) {
            signalId = OS.g_signal_lookup(OS.map, GTK.GTK_TYPE_WIDGET());
            hookId = OS.g_signal_add_emission_hook(signalId, 0, display.emissionProc, handle, 0);
        }
        display.sendPreExternalEventDispatchEvent();
        int response = GTK.gtk_dialog_run(handle);
        /*
        * 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 acquired by the function above.
        */
        if (!GTK.GTK4)
            GDK.gdk_threads_leave();
        display.sendPostExternalEventDispatchEvent();
        if ((style & SWT.RIGHT_TO_LEFT) != 0) {
            OS.g_signal_remove_emission_hook(signalId, hookId);
        }
        if (GTK.gtk_window_get_modal(handle)) {
            display.setModalDialog(oldModal);
        }
        if (response == GTK.GTK_RESPONSE_OK) {
            answer = computeResultChooserDialog();
        }
        display.removeIdleProc();
        GTK.gtk_widget_destroy(handle);
        return answer;
    }

    void presetChooserDialog() {
        /* MULTI is only valid if the native dialog's action is Open */
        if ((style & (SWT.SAVE | SWT.MULTI)) == SWT.MULTI) {
            GTK.gtk_file_chooser_set_select_multiple(handle, true);
        }
        if (filterPath == null)
            filterPath = "";
        if (fileName == null)
            fileName = "";
        if ((style & SWT.SAVE) != 0) {
            if (fileName.equals("")) {
                fileName = "Untitled";
            }
            if (filterPath.length() > 0) {
                if (uriMode) {
                    byte[] buffer = Converter.wcsToMbcs(filterPath, true);
                    GTK.gtk_file_chooser_set_current_folder_uri(handle, buffer);
                } else {
                    /* filename must be a full path */
                    byte[] buffer = Converter.wcsToMbcs(SEPARATOR + filterPath, true);
                    /*
                     * in GTK version 2.10, gtk_file_chooser_set_current_folder requires path
                     * to be true canonical path. So using realpath to convert the path to
                     * true canonical path.
                     */
                    long ptr = OS.realpath(buffer, null);
                    if (ptr != 0) {
                        GTK.gtk_file_chooser_set_current_folder(handle, ptr);
                        OS.g_free(ptr);
                    }
                }
            }
            if (fileName.length() > 0) {
                StringBuilder filenameWithExt = new StringBuilder();
                filenameWithExt.append(fileName);
                if ((fileName.lastIndexOf(FILE_EXTENSION_SEPARATOR) == -1) && (filterExtensions.length != 0)) { // Filename doesn't contain the extension and user has provided filter extensions
                    String selectedFilter = null;
                    if (this.filterIndex == -1) {
                        selectedFilter = filterExtensions[0];
                    } else {
                        selectedFilter = filterExtensions[filterIndex];
                    }
                    String extFilter = null;
                    int index = selectedFilter.indexOf(EXTENSION_SEPARATOR);
                    if (index == -1) {
                        extFilter = selectedFilter.trim();
                    } else {
                        extFilter = selectedFilter.substring(0, index).trim();
                    }

                    int separatorIndex = extFilter.lastIndexOf(FILE_EXTENSION_SEPARATOR);
                    String extension = extFilter.substring(separatorIndex);

                    if (!isGlobPattern(extension)) { //if the extension is of type glob pattern we should not add the extension
                        filenameWithExt.append(extension);
                    }
                }
                byte[] buffer = Converter.wcsToMbcs(filenameWithExt.toString(), true);
                GTK.gtk_file_chooser_set_current_name(handle, buffer);
            }
        } else {
            StringBuilder stringBuilder = new StringBuilder();
            if (filterPath.length() > 0) {
                if (!uriMode) {
                    /* filename must be a full path */
                    stringBuilder.append(SEPARATOR);
                }
                stringBuilder.append(filterPath);
                stringBuilder.append(SEPARATOR);
            }
            if (fileName.length() > 0) {
                stringBuilder.append(fileName);
            }
            byte[] buffer = Converter.wcsToMbcs(stringBuilder.toString(), true);
            if (uriMode) {
                GTK.gtk_file_chooser_set_uri(handle, buffer);
            } else {
                /*
                 * in GTK version 2.10, gtk_file_chooser_set_current_folder requires path
                 * to be true canonical path. So using realpath to convert the path to
                 * true canonical path.
                 */
                long ptr = OS.realpath(buffer, null);
                if (ptr != 0) {
                    if (fileName.length() > 0) {
                        GTK.gtk_file_chooser_set_filename(handle, ptr);
                    } else {
                        GTK.gtk_file_chooser_set_current_folder(handle, ptr);
                    }
                    OS.g_free(ptr);
                }
            }
        }

        /* Set overwrite mode */
        if ((style & SWT.SAVE) != 0) {
            GTK.gtk_file_chooser_set_do_overwrite_confirmation(handle, overwrite);
        }

        /* Set the extension filters */
        if (filterNames == null)
            filterNames = new String[0];
        if (filterExtensions == null)
            filterExtensions = new String[0];
        long initialFilter = 0;
        for (int i = 0; i < filterExtensions.length; i++) {
            if (filterExtensions[i] != null) {
                long filter = GTK.gtk_file_filter_new();
                if (filterNames.length > i && filterNames[i] != null) {
                    byte[] name = Converter.wcsToMbcs(filterNames[i], true);
                    GTK.gtk_file_filter_set_name(filter, name);
                } else {
                    byte[] name = Converter.wcsToMbcs(filterExtensions[i], true);
                    GTK.gtk_file_filter_set_name(filter, name);
                }
                int start = 0;
                int index = filterExtensions[i].indexOf(EXTENSION_SEPARATOR);
                while (index != -1) {
                    String current = filterExtensions[i].substring(start, index);
                    byte[] filterString = Converter.wcsToMbcs(current, true);
                    GTK.gtk_file_filter_add_pattern(filter, filterString);
                    start = index + 1;
                    index = filterExtensions[i].indexOf(EXTENSION_SEPARATOR, start);
                }
                String current = filterExtensions[i].substring(start);
                byte[] filterString = Converter.wcsToMbcs(current, true);
                GTK.gtk_file_filter_add_pattern(filter, filterString);
                GTK.gtk_file_chooser_add_filter(handle, filter);
                if (i == filterIndex) {
                    initialFilter = filter;
                }
            }
        }
        if (initialFilter != 0) {
            GTK.gtk_file_chooser_set_filter(handle, initialFilter);
        }
        fullPath = null;
        fileNames = new String[0];
    }

    /**
     * Check whether the file extension is a glob pattern.
     * For example, *.* is a glob pattern which corresponds to all files
     * *.jp* corresponds to all the files with extension starting with jp like jpg,jpeg etc
     * *.jp? corresponds to 3 letter extension starting with jp with any 3rd letter
     * *.[pq]ng this corresponds to *.png and *.qng
     *
     * @param extension file extension as a string
     *
     * @returns true if the extension contains any of the glob pattern wildcards
     */
    private boolean isGlobPattern(String extension) {
        if (extension.contains("*") || extension.contains("?")
                || (extension.contains("[") && extension.contains("]"))) {
            return true;
        }
        return false;
    }

    /**
     * Set the initial filename which the dialog will
     * select by default when opened to the argument,
     * which may be null.  The name will be prefixed with
     * the filter path when one is supplied.
     *
     * @param string the file name
     */
    public void setFileName(String string) {
        fileName = string;
    }

    /**
     * Set the file extensions which the dialog will
     * use to filter the files it shows to the argument,
     * which may be null.
     * <p>
     * The strings are platform specific. For example, on
     * some platforms, an extension filter string is typically
     * of the form "*.extension", where "*.*" matches all files.
     * For filters with multiple extensions, use semicolon as
     * a separator, e.g. "*.jpg;*.png".
     * </p>
     * <p>
     * Note: On Mac, setting the file extension filter affects how
     * app bundles are treated by the dialog. When a filter extension
     * having the app extension (.app) is selected, bundles are treated
     * as files. For all other extension filters, bundles are treated
     * as directories. When no filter extension is set, bundles are
     * treated as files.
     * </p>
     *
     * @param extensions the file extension filter
     *
     * @see #setFilterNames to specify the user-friendly
     * names corresponding to the extensions
     */
    public void setFilterExtensions(String[] extensions) {
        filterExtensions = extensions;
    }

    /**
     * Set the 0-based index of the file extension filter
     * which the dialog will use initially to filter the files
     * it shows to the argument.
     * <p>
     * This is an index into the FilterExtensions array and
     * the FilterNames array.
     * </p>
     *
     * @param index the file extension filter index
     *
     * @see #setFilterExtensions
     * @see #setFilterNames
     *
     * @since 3.4
     */
    public void setFilterIndex(int index) {
        filterIndex = index;
    }

    /**
     * Sets the names that describe the filter extensions
     * which the dialog will use to filter the files it shows
     * to the argument, which may be null.
     * <p>
     * Each name is a user-friendly short description shown for
     * its corresponding filter. The <code>names</code> array must
     * be the same length as the <code>extensions</code> array.
     * </p>
     *
     * @param names the list of filter names, or null for no filter names
     *
     * @see #setFilterExtensions
     */
    public void setFilterNames(String[] names) {
        filterNames = names;
    }

    /**
     * Sets the directory path that the dialog will use
     * to the argument, which may be null. File names in this
     * path will appear in the dialog, filtered according
     * to the filter extensions. If the string is null,
     * then the operating system's default filter path
     * will be used.
     * <p>
     * Note that the path string is platform dependent.
     * For convenience, either '/' or '\' can be used
     * as a path separator.
     * </p>
     *
     * @param string the directory path
     *
     * @see #setFilterExtensions
     */
    public void setFilterPath(String string) {
        filterPath = string;
    }

    /**
     * Sets the flag that the dialog will use to
     * determine whether to prompt the user for file
     * overwrite if the selected file already exists.
     *
     * @param overwrite true if the dialog will prompt for file overwrite, false otherwise
     *
     * @since 3.4
     */
    public void setOverwrite(boolean overwrite) {
        this.overwrite = overwrite;
    }

    /* Sets URI Mode.
     *
     * When the FileDialog is in URI mode it returns
     * a URI (instead of a file name) for the following
     * methods: open() and getFilterPath().
     * The input argment for setFilterPath() should also
     * be a URI.
     */
    /*public*/ void setURIMode(boolean uriMode) {
        this.uriMode = uriMode;
    }
}