| /******************************************************************************* |
| * Copyright (c) 2005 The Regents of the University of California. |
| * This material was produced under U.S. Government contract W-7405-ENG-36 |
| * for Los Alamos National Laboratory, which is operated by the University |
| * of California for the U.S. Department of Energy. The U.S. Government has |
| * rights to use, reproduce, and distribute this software. NEITHER THE |
| * GOVERNMENT NOR THE UNIVERSITY MAKES ANY WARRANTY, EXPRESS OR IMPLIED, OR |
| * ASSUMES ANY LIABILITY FOR THE USE OF THIS SOFTWARE. If software is modified |
| * to produce derivative works, such modified software should be clearly marked, |
| * so as not to confuse it with the version available from LANL. |
| * |
| * Additionally, this program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * LA-CC 04-115 |
| *******************************************************************************/ |
| package org.eclipse.ptp.debug.internal.ui; |
| |
| import org.eclipse.core.runtime.Assert; |
| import org.eclipse.jface.dialogs.IDialogConstants; |
| import org.eclipse.swt.SWT; |
| import org.eclipse.swt.dnd.DragSource; |
| import org.eclipse.swt.dnd.DropTarget; |
| import org.eclipse.swt.layout.GridData; |
| import org.eclipse.swt.widgets.Button; |
| import org.eclipse.swt.widgets.Caret; |
| import org.eclipse.swt.widgets.Control; |
| import org.eclipse.swt.widgets.Display; |
| import org.eclipse.swt.widgets.Menu; |
| import org.eclipse.swt.widgets.ScrollBar; |
| import org.eclipse.swt.widgets.Shell; |
| import org.eclipse.swt.widgets.Widget; |
| |
| /** |
| * @author Clement chu |
| */ |
| public class SWTUtil { |
| /** |
| * Returns the standard display to be used. The method first checks, if the |
| * thread calling this method has an associated disaply. If so, this |
| * display is returned. Otherwise the method returns the default display. |
| */ |
| public static Display getStandardDisplay() { |
| Display display; |
| display = Display.getCurrent(); |
| if (display == null) |
| display = Display.getDefault(); |
| return display; |
| } |
| |
| /** |
| * Returns the shell for the given widget. If the widget doesn't represent |
| * a SWT object that manage a shell, <code>null</code> is returned. |
| * |
| * @return the shell for the given widget |
| */ |
| public static Shell getShell(Widget widget) { |
| if (widget instanceof Control) |
| return ((Control)widget).getShell(); |
| if (widget instanceof Caret) |
| return ((Caret)widget).getParent().getShell(); |
| if (widget instanceof DragSource) |
| return ((DragSource)widget).getControl().getShell(); |
| if (widget instanceof DropTarget) |
| return ((DropTarget)widget).getControl().getShell(); |
| if (widget instanceof Menu) |
| return ((Menu)widget).getParent().getShell(); |
| if (widget instanceof ScrollBar) |
| return ((ScrollBar)widget).getParent().getShell(); |
| return null; |
| } |
| |
| /** |
| * Returns a width hint for a button control. |
| */ |
| public static int getButtonWidthHint(Button button) { |
| PixelConverter converter = new PixelConverter(button); |
| int widthHint = converter.convertHorizontalDLUsToPixels(IDialogConstants.BUTTON_WIDTH); |
| return Math.max(widthHint, button.computeSize(SWT.DEFAULT, SWT.DEFAULT, true).x); |
| } |
| |
| /** |
| * Returns a height hint for a button control. |
| */ |
| // public static int getButtonHeigthHint(Button button) { |
| // PixelConverter converter = new PixelConverter(button); |
| // return converter.convertVerticalDLUsToPixels(IDialogConstants.BUTTON_HEIGHT); |
| // } |
| |
| /** |
| * Sets width and height hint for the button control. <b>Note:</b> This |
| * is a NOP if the button's layout data is not an instance of <code>GridData</code>. |
| * |
| * @param the button for which to set the dimension hint |
| */ |
| public static void setButtonDimensionHint(Button button) { |
| Assert.isNotNull(button); |
| Object gd = button.getLayoutData(); |
| if (gd instanceof GridData) { |
| ((GridData)gd).widthHint = getButtonWidthHint(button); |
| ((GridData)gd).horizontalAlignment = GridData.FILL; |
| } |
| } |
| } |