Java tutorial
/******************************************************************************* * Copyright (c) 2000, 2017 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.win32.*; /** * Instances of this class represent a column in a table widget. * <dl> * <dt><b>Styles:</b></dt> * <dd>LEFT, RIGHT, CENTER</dd> * <dt><b>Events:</b></dt> * <dd> Move, Resize, Selection</dd> * </dl> * <p> * Note: Only one of the styles LEFT, RIGHT and CENTER 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/#table">Table, TableItem, TableColumn snippets</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 TableColumn extends Item { Table parent; boolean resizable, moveable; String toolTipText; int id; /** * Constructs a new instance of this class given its parent * (which must be a <code>Table</code>) and a style value * describing its behavior and appearance. The item is added * to the end of the items maintained by its parent. * <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 composite control which will be the parent of the new instance (cannot be null) * @param style the style of control 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#LEFT * @see SWT#RIGHT * @see SWT#CENTER * @see Widget#checkSubclass * @see Widget#getStyle */ public TableColumn(Table parent, int style) { super(parent, checkStyle(style)); resizable = true; this.parent = parent; parent.createItem(this, parent.getColumnCount()); } /** * Constructs a new instance of this class given its parent * (which must be a <code>Table</code>), a style value * describing its behavior and appearance, and the index * at which to place it in the items maintained by its parent. * <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 that due to a restriction on some platforms, the first column * is always left aligned. * </p> * @param parent a composite control which will be the parent of the new instance (cannot be null) * @param style the style of control to construct * @param index the zero-relative index to store the receiver in its parent * * @exception IllegalArgumentException <ul> * <li>ERROR_NULL_ARGUMENT - if the parent is null</li> * <li>ERROR_INVALID_RANGE - if the index is not between 0 and the number of elements in the parent (inclusive)</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#LEFT * @see SWT#RIGHT * @see SWT#CENTER * @see Widget#checkSubclass * @see Widget#getStyle */ public TableColumn(Table parent, int style, int index) { super(parent, checkStyle(style)); resizable = true; this.parent = parent; parent.createItem(this, index); } /** * Adds the listener to the collection of listeners who will * be notified when the control is moved or resized, by sending * it one of the messages defined in the <code>ControlListener</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 ControlListener * @see #removeControlListener */ public void addControlListener(ControlListener listener) { checkWidget(); if (listener == null) error(SWT.ERROR_NULL_ARGUMENT); TypedListener typedListener = new TypedListener(listener); addListener(SWT.Resize, typedListener); addListener(SWT.Move, typedListener); } /** * Adds the listener to the collection of listeners who will * be notified when the control is selected by the user, by sending * it one of the messages defined in the <code>SelectionListener</code> * interface. * <p> * <code>widgetSelected</code> is called when the column header is selected. * <code>widgetDefaultSelected</code> is not called. * </p> * * @param listener the listener which should be notified when the control is selected by the user * * @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 SelectionListener * @see #removeSelectionListener * @see SelectionEvent */ public void addSelectionListener(SelectionListener listener) { checkWidget(); if (listener == null) error(SWT.ERROR_NULL_ARGUMENT); TypedListener typedListener = new TypedListener(listener); addListener(SWT.Selection, typedListener); addListener(SWT.DefaultSelection, typedListener); } static int checkStyle(int style) { return checkBits(style, SWT.LEFT, SWT.CENTER, SWT.RIGHT, 0, 0, 0); } @Override protected void checkSubclass() { if (!isValidSubclass()) error(SWT.ERROR_INVALID_SUBCLASS); } @Override void destroyWidget() { parent.destroyItem(this); releaseHandle(); } /** * Returns a value which describes the position of the * text or image in the receiver. The value will be one of * <code>LEFT</code>, <code>RIGHT</code> or <code>CENTER</code>. * * @return the alignment * * @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 int getAlignment() { checkWidget(); if ((style & SWT.LEFT) != 0) return SWT.LEFT; if ((style & SWT.CENTER) != 0) return SWT.CENTER; if ((style & SWT.RIGHT) != 0) return SWT.RIGHT; return SWT.LEFT; } @Override String getNameText() { return getText(); } /** * Returns the receiver's parent, which must be a <code>Table</code>. * * @return the receiver's parent * * @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 Table getParent() { checkWidget(); return parent; } /** * Gets the moveable attribute. A column that is * not moveable cannot be reordered by the user * by dragging the header but may be reordered * by the programmer. * * @return the moveable attribute * * @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 Table#getColumnOrder() * @see Table#setColumnOrder(int[]) * @see TableColumn#setMoveable(boolean) * @see SWT#Move * * @since 3.1 */ public boolean getMoveable() { checkWidget(); return moveable; } /** * Gets the resizable attribute. A column that is * not resizable cannot be dragged by the user but * may be resized by the programmer. * * @return the resizable attribute * * @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 boolean getResizable() { checkWidget(); return resizable; } /** * Returns the receiver's tool tip text, or null if it has * not been set. * * @return the receiver's tool tip text * * @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 3.2 */ public String getToolTipText() { checkWidget(); return toolTipText; } /** * Gets the width of the receiver. * * @return the width * * @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 int getWidth() { checkWidget(); return DPIUtil.autoScaleDown(getWidthInPixels()); } int getWidthInPixels() { int index = parent.indexOf(this); if (index == -1) return 0; long hwnd = parent.handle; return (int) OS.SendMessage(hwnd, OS.LVM_GETCOLUMNWIDTH, index, 0); } /** * Causes the receiver to be resized to its preferred size. * For a composite, this involves computing the preferred size * from its layout, if there is one. * * @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 void pack() { checkWidget(); int index = parent.indexOf(this); if (index == -1) return; long hwnd = parent.handle; int oldWidth = (int) OS.SendMessage(hwnd, OS.LVM_GETCOLUMNWIDTH, index, 0); TCHAR buffer = new TCHAR(parent.getCodePage(), text, true); int headerWidth = (int) OS.SendMessage(hwnd, OS.LVM_GETSTRINGWIDTH, 0, buffer) + Table.HEADER_MARGIN; if (OS.IsAppThemed()) headerWidth += Table.HEADER_EXTRA; boolean hasHeaderImage = false; if (image != null || parent.sortColumn == this) { hasHeaderImage = true; if (parent.sortColumn == this && parent.sortDirection != SWT.NONE) { headerWidth += Table.SORT_WIDTH; } else if (image != null) { Rectangle bounds = image.getBoundsInPixels(); headerWidth += bounds.width; } long hwndHeader = OS.SendMessage(hwnd, OS.LVM_GETHEADER, 0, 0); int margin = (int) OS.SendMessage(hwndHeader, OS.HDM_GETBITMAPMARGIN, 0, 0); headerWidth += margin * 4; } parent.ignoreColumnResize = true; int columnWidth = 0; if (parent.hooks(SWT.MeasureItem)) { RECT headerRect = new RECT(); long hwndHeader = OS.SendMessage(hwnd, OS.LVM_GETHEADER, 0, 0); OS.SendMessage(hwndHeader, OS.HDM_GETITEMRECT, index, headerRect); OS.MapWindowPoints(hwndHeader, hwnd, headerRect, 2); long hDC = OS.GetDC(hwnd); long oldFont = 0, newFont = OS.SendMessage(hwnd, OS.WM_GETFONT, 0, 0); if (newFont != 0) oldFont = OS.SelectObject(hDC, newFont); int count = (int) OS.SendMessage(hwnd, OS.LVM_GETITEMCOUNT, 0, 0); for (int i = 0; i < count; i++) { TableItem item = parent._getItem(i, false); if (item != null) { long hFont = item.fontHandle(index); if (hFont != -1) hFont = OS.SelectObject(hDC, hFont); Event event = parent.sendMeasureItemEvent(item, i, index, hDC); if (hFont != -1) hFont = OS.SelectObject(hDC, hFont); if (isDisposed() || parent.isDisposed()) break; Rectangle bounds = event.getBoundsInPixels(); columnWidth = Math.max(columnWidth, bounds.x + bounds.width - headerRect.left); } } if (newFont != 0) OS.SelectObject(hDC, oldFont); OS.ReleaseDC(hwnd, hDC); OS.SendMessage(hwnd, OS.LVM_SETCOLUMNWIDTH, index, columnWidth); } else { OS.SendMessage(hwnd, OS.LVM_SETCOLUMNWIDTH, index, OS.LVSCW_AUTOSIZE); columnWidth = (int) OS.SendMessage(hwnd, OS.LVM_GETCOLUMNWIDTH, index, 0); if (index == 0) { /* * Bug in Windows. When LVM_SETCOLUMNWIDTH is used with LVSCW_AUTOSIZE * where each item has I_IMAGECALLBACK but there are no images in the * table, the size computed by LVM_SETCOLUMNWIDTH is too small for the * first column, causing long items to be clipped with '...'. The fix * is to increase the column width by a small amount. */ if (parent.imageList == null) columnWidth += 2; /* * Bug in Windows. When LVM_SETCOLUMNWIDTH is used with LVSCW_AUTOSIZE * for a table with a state image list, the column is width does not * include space for the state icon. The fix is to increase the column * width by the width of the image list. */ if ((parent.style & SWT.CHECK) != 0) { long hStateList = OS.SendMessage(hwnd, OS.LVM_GETIMAGELIST, OS.LVSIL_STATE, 0); if (hStateList != 0) { int[] cx = new int[1], cy = new int[1]; OS.ImageList_GetIconSize(hStateList, cx, cy); columnWidth += cx[0]; } } } } if (headerWidth > columnWidth) { if (!hasHeaderImage) { /* * Feature in Windows. When LVSCW_AUTOSIZE_USEHEADER is used * with LVM_SETCOLUMNWIDTH to resize the last column, the last * column is expanded to fill the client area. The fix is to * resize the table to be small, set the column width and then * restore the table to its original size. */ RECT rect = null; boolean fixWidth = index == parent.getColumnCount() - 1; if (fixWidth) { rect = new RECT(); OS.GetWindowRect(hwnd, rect); OS.UpdateWindow(hwnd); int flags = OS.SWP_NOACTIVATE | OS.SWP_NOMOVE | OS.SWP_NOREDRAW | OS.SWP_NOZORDER; OS.SetWindowPos(hwnd, 0, 0, 0, 0, rect.bottom - rect.top, flags); } OS.SendMessage(hwnd, OS.LVM_SETCOLUMNWIDTH, index, OS.LVSCW_AUTOSIZE_USEHEADER); if (fixWidth) { int flags = OS.SWP_NOACTIVATE | OS.SWP_NOMOVE | OS.SWP_NOZORDER; OS.SetWindowPos(hwnd, 0, 0, 0, rect.right - rect.left, rect.bottom - rect.top, flags); } } else { OS.SendMessage(hwnd, OS.LVM_SETCOLUMNWIDTH, index, headerWidth); } } else { if (index == 0) { OS.SendMessage(hwnd, OS.LVM_SETCOLUMNWIDTH, index, columnWidth); } } parent.ignoreColumnResize = false; int newWidth = (int) OS.SendMessage(hwnd, OS.LVM_GETCOLUMNWIDTH, index, 0); if (oldWidth != newWidth) { updateToolTip(index); sendEvent(SWT.Resize); if (isDisposed()) return; boolean moved = false; int[] order = parent.getColumnOrder(); TableColumn[] columns = parent.getColumns(); for (int i = 0; i < order.length; i++) { TableColumn column = columns[order[i]]; if (moved && !column.isDisposed()) { column.updateToolTip(order[i]); column.sendEvent(SWT.Move); } if (column == this) moved = true; } } } @Override void releaseHandle() { super.releaseHandle(); parent = null; } @Override void releaseParent() { super.releaseParent(); if (parent.sortColumn == this) { parent.sortColumn = null; } } /** * Removes the listener from the collection of listeners who will * be notified when the control is moved or resized. * * @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 ControlListener * @see #addControlListener */ public void removeControlListener(ControlListener listener) { checkWidget(); if (listener == null) error(SWT.ERROR_NULL_ARGUMENT); if (eventTable == null) return; eventTable.unhook(SWT.Move, listener); eventTable.unhook(SWT.Resize, listener); } /** * Removes the listener from the collection of listeners who will * be notified when the control is selected by the user. * * @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 SelectionListener * @see #addSelectionListener */ public void removeSelectionListener(SelectionListener listener) { checkWidget(); if (listener == null) error(SWT.ERROR_NULL_ARGUMENT); if (eventTable == null) return; eventTable.unhook(SWT.Selection, listener); eventTable.unhook(SWT.DefaultSelection, listener); } /** * Controls how text and images will be displayed in the receiver. * The argument should be one of <code>LEFT</code>, <code>RIGHT</code> * or <code>CENTER</code>. * <p> * Note that due to a restriction on some platforms, the first column * is always left aligned. * </p> * @param alignment the new alignment * * @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 void setAlignment(int alignment) { checkWidget(); if ((alignment & (SWT.LEFT | SWT.RIGHT | SWT.CENTER)) == 0) return; int index = parent.indexOf(this); if (index == -1 || index == 0) return; style &= ~(SWT.LEFT | SWT.RIGHT | SWT.CENTER); style |= alignment & (SWT.LEFT | SWT.RIGHT | SWT.CENTER); long hwnd = parent.handle; LVCOLUMN lvColumn = new LVCOLUMN(); lvColumn.mask = OS.LVCF_FMT; OS.SendMessage(hwnd, OS.LVM_GETCOLUMN, index, lvColumn); lvColumn.fmt &= ~OS.LVCFMT_JUSTIFYMASK; int fmt = 0; if ((style & SWT.LEFT) == SWT.LEFT) fmt = OS.LVCFMT_LEFT; if ((style & SWT.CENTER) == SWT.CENTER) fmt = OS.LVCFMT_CENTER; if ((style & SWT.RIGHT) == SWT.RIGHT) fmt = OS.LVCFMT_RIGHT; lvColumn.fmt |= fmt; OS.SendMessage(hwnd, OS.LVM_SETCOLUMN, index, lvColumn); /* * Bug in Windows. When LVM_SETCOLUMN is used to change * the alignment of a column, the column is not redrawn * to show the new alignment. The fix is to compute the * visible rectangle for the column and redraw it. */ if (index != 0) { parent.forceResize(); RECT rect = new RECT(), headerRect = new RECT(); OS.GetClientRect(hwnd, rect); long hwndHeader = OS.SendMessage(hwnd, OS.LVM_GETHEADER, 0, 0); OS.SendMessage(hwndHeader, OS.HDM_GETITEMRECT, index, headerRect); OS.MapWindowPoints(hwndHeader, hwnd, headerRect, 2); rect.left = headerRect.left; rect.right = headerRect.right; OS.InvalidateRect(hwnd, rect, true); } } @Override public void setImage(Image image) { checkWidget(); if (image != null && image.isDisposed()) { error(SWT.ERROR_INVALID_ARGUMENT); } super.setImage(image); if (parent.sortColumn != this || parent.sortDirection != SWT.NONE) { setImage(image, false, false); } } void setImage(Image image, boolean sort, boolean right) { int index = parent.indexOf(this); if (index == -1) return; long hwnd = parent.handle; LVCOLUMN lvColumn = new LVCOLUMN(); lvColumn.mask = OS.LVCF_FMT | OS.LVCF_IMAGE; OS.SendMessage(hwnd, OS.LVM_GETCOLUMN, index, lvColumn); if (image != null) { lvColumn.fmt |= OS.LVCFMT_IMAGE; lvColumn.iImage = parent.imageIndexHeader(image); if (right) lvColumn.fmt |= OS.LVCFMT_BITMAP_ON_RIGHT; } else { lvColumn.mask &= ~OS.LVCF_IMAGE; lvColumn.fmt &= ~(OS.LVCFMT_IMAGE | OS.LVCFMT_BITMAP_ON_RIGHT); } OS.SendMessage(hwnd, OS.LVM_SETCOLUMN, index, lvColumn); } /** * Sets the moveable attribute. A column that is * moveable can be reordered by the user by dragging * the header. A column that is not moveable cannot be * dragged by the user but may be reordered * by the programmer. * * @param moveable the moveable attribute * * @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 Table#setColumnOrder(int[]) * @see Table#getColumnOrder() * @see TableColumn#getMoveable() * @see SWT#Move * * @since 3.1 */ public void setMoveable(boolean moveable) { checkWidget(); this.moveable = moveable; parent.updateMoveable(); } /** * Sets the resizable attribute. A column that is * resizable can be resized by the user dragging the * edge of the header. A column that is not resizable * cannot be dragged by the user but may be resized * by the programmer. * * @param resizable the resize attribute * * @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 void setResizable(boolean resizable) { checkWidget(); this.resizable = resizable; } void setSortDirection(int direction) { int index = parent.indexOf(this); if (index == -1) return; long hwnd = parent.handle; long hwndHeader = OS.SendMessage(hwnd, OS.LVM_GETHEADER, 0, 0); HDITEM hdItem = new HDITEM(); hdItem.mask = OS.HDI_FORMAT | OS.HDI_IMAGE; OS.SendMessage(hwndHeader, OS.HDM_GETITEM, index, hdItem); switch (direction) { case SWT.UP: hdItem.fmt &= ~(OS.HDF_IMAGE | OS.HDF_SORTDOWN); hdItem.fmt |= OS.HDF_SORTUP; if (image == null) hdItem.mask &= ~OS.HDI_IMAGE; break; case SWT.DOWN: hdItem.fmt &= ~(OS.HDF_IMAGE | OS.HDF_SORTUP); hdItem.fmt |= OS.HDF_SORTDOWN; if (image == null) hdItem.mask &= ~OS.HDI_IMAGE; break; case SWT.NONE: hdItem.fmt &= ~(OS.HDF_SORTUP | OS.HDF_SORTDOWN); if (image != null) { hdItem.fmt |= OS.HDF_IMAGE; hdItem.iImage = parent.imageIndexHeader(image); } else { hdItem.fmt &= ~OS.HDF_IMAGE; hdItem.mask &= ~OS.HDI_IMAGE; } break; } OS.SendMessage(hwndHeader, OS.HDM_SETITEM, index, hdItem); /* * Bug in Windows. When LVM_SETSELECTEDCOLUMN is used to * specify a selected column, Windows does not redraw either * the new or the previous selected column. The fix is to * force a redraw of both. * * Feature in Windows. When LVM_SETBKCOLOR is used with * CLR_NONE and LVM_SETSELECTEDCOLUMN is used to select * a column, Windows fills the column with the selection * color, drawing on top of the background image and any * other custom drawing. The fix is to avoid setting the * selected column. */ parent.forceResize(); RECT rect = new RECT(); OS.GetClientRect(hwnd, rect); if ((int) OS.SendMessage(hwnd, OS.LVM_GETBKCOLOR, 0, 0) != OS.CLR_NONE) { int oldColumn = (int) OS.SendMessage(hwnd, OS.LVM_GETSELECTEDCOLUMN, 0, 0); int newColumn = direction == SWT.NONE ? -1 : index; OS.SendMessage(hwnd, OS.LVM_SETSELECTEDCOLUMN, newColumn, 0); RECT headerRect = new RECT(); if (oldColumn != -1) { if (OS.SendMessage(hwndHeader, OS.HDM_GETITEMRECT, oldColumn, headerRect) != 0) { OS.MapWindowPoints(hwndHeader, hwnd, headerRect, 2); rect.left = headerRect.left; rect.right = headerRect.right; OS.InvalidateRect(hwnd, rect, true); } } } RECT headerRect = new RECT(); if (OS.SendMessage(hwndHeader, OS.HDM_GETITEMRECT, index, headerRect) != 0) { OS.MapWindowPoints(hwndHeader, hwnd, headerRect, 2); rect.left = headerRect.left; rect.right = headerRect.right; OS.InvalidateRect(hwnd, rect, true); } } @Override public void setText(String string) { checkWidget(); if (string == null) error(SWT.ERROR_NULL_ARGUMENT); if (string.equals(text)) return; int index = parent.indexOf(this); if (index == -1) return; super.setText(string); /* * Bug in Windows. For some reason, when the title * of a column is changed after the column has been * created, the alignment must also be reset or the * text does not draw. The fix is to query and then * set the alignment. */ long hwnd = parent.handle; LVCOLUMN lvColumn = new LVCOLUMN(); lvColumn.mask = OS.LVCF_FMT; OS.SendMessage(hwnd, OS.LVM_GETCOLUMN, index, lvColumn); /* * Bug in Windows. When a column header contains a * mnemonic character, Windows does not measure the * text properly. This causes '...' to always appear * at the end of the text. The fix is to remove * mnemonic characters. */ long hHeap = OS.GetProcessHeap(); char[] buffer = fixMnemonic(string); int byteCount = buffer.length * TCHAR.sizeof; long pszText = OS.HeapAlloc(hHeap, OS.HEAP_ZERO_MEMORY, byteCount); OS.MoveMemory(pszText, buffer, byteCount); lvColumn.mask |= OS.LVCF_TEXT; lvColumn.pszText = pszText; long result = OS.SendMessage(hwnd, OS.LVM_SETCOLUMN, index, lvColumn); if (pszText != 0) OS.HeapFree(hHeap, 0, pszText); if (result == 0) error(SWT.ERROR_CANNOT_SET_TEXT); } /** * Sets the receiver's tool tip text to the argument, which * may be null indicating that the default tool tip for the * control will be shown. For a control that has a default * tool tip, such as the Tree control on Windows, setting * the tool tip text to an empty string replaces the default, * causing no tool tip text to be shown. * <p> * The mnemonic indicator (character '&') is not displayed in a tool tip. * To display a single '&' in the tool tip, the character '&' can be * escaped by doubling it in the string. * </p> * <p> * NOTE: This operation is a hint and behavior is platform specific, on Windows * for CJK-style mnemonics of the form " (&C)" at the end of the tooltip text * are not shown in tooltip. * </p> * * @param string the new tool tip text (or null) * * @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 3.2 */ public void setToolTipText(String string) { checkWidget(); toolTipText = string; long hwndHeaderToolTip = parent.headerToolTipHandle; if (hwndHeaderToolTip == 0) { parent.createHeaderToolTips(); parent.updateHeaderToolTips(); } } /** * Sets the width of the receiver. * * @param width the new width * * @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 void setWidth(int width) { checkWidget(); setWidthInPixels(DPIUtil.autoScaleUp(width)); } void setWidthInPixels(int width) { if (width < 0) return; int index = parent.indexOf(this); if (index == -1) return; long hwnd = parent.handle; if (width != (int) OS.SendMessage(hwnd, OS.LVM_GETCOLUMNWIDTH, index, 0)) { OS.SendMessage(hwnd, OS.LVM_SETCOLUMNWIDTH, index, width); } } void updateToolTip(int index) { long hwndHeaderToolTip = parent.headerToolTipHandle; if (hwndHeaderToolTip != 0) { long hwnd = parent.handle; long hwndHeader = OS.SendMessage(hwnd, OS.LVM_GETHEADER, 0, 0); RECT rect = new RECT(); if (OS.SendMessage(hwndHeader, OS.HDM_GETITEMRECT, index, rect) != 0) { TOOLINFO lpti = new TOOLINFO(); lpti.cbSize = TOOLINFO.sizeof; lpti.hwnd = hwndHeader; lpti.uId = id; lpti.left = rect.left; lpti.top = rect.top; lpti.right = rect.right; lpti.bottom = rect.bottom; OS.SendMessage(hwndHeaderToolTip, OS.TTM_NEWTOOLRECT, 0, lpti); } } } }