| /******************************************************************************* |
| * Copyright (c) 2018 Simeon Andreev and others. All rights reserved. |
| * The contents of this file are made available under the terms |
| * of the GNU Lesser General Public License (LGPL) Version 2.1 that |
| * accompanies this distribution (lgpl-v21.txt). The LGPL is also |
| * available at http://www.gnu.org/licenses/lgpl.html. If the version |
| * of the LGPL at http://www.gnu.org is different to the version of |
| * the LGPL accompanying this distribution and there is any conflict |
| * between the two license versions, the terms of the LGPL accompanying |
| * this distribution shall govern. |
| * |
| * Contributors: |
| * Simeon Andreev - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.swt.tests.gtk.snippets; |
| |
| import org.eclipse.swt.SWT; |
| import org.eclipse.swt.events.PaintEvent; |
| import org.eclipse.swt.events.PaintListener; |
| import org.eclipse.swt.graphics.GC; |
| import org.eclipse.swt.graphics.Image; |
| import org.eclipse.swt.layout.FillLayout; |
| import org.eclipse.swt.widgets.Display; |
| import org.eclipse.swt.widgets.Group; |
| import org.eclipse.swt.widgets.Shell; |
| |
| /** |
| * Description: Drawing an image with a paint listener of a {@link Group} yields wrong results, |
| * namely the drawing is done in the group area and not in client area of the group. |
| * This causes problems e.g. with JFace ControlDecoration. |
| * Steps to reproduce: |
| * <ol> |
| * <li>Run the snippet.</li> |
| * </ol> |
| * Expected results: The shell contains a group, with a square fully within the group area. |
| * Actual results: The shell contains a group, with a square painted partially outside of the group area. |
| */ |
| public class Bug531667_Group_drawing_with_paint_listener_is_wrong { |
| |
| public static void main(String[] args) { |
| final Display display = new Display(); |
| Shell shell = new Shell(display); |
| shell.setLayout(new FillLayout()); |
| shell.setSize(200, 200); |
| shell.setText("Bug 531667 paint inside a Group is wrong"); |
| |
| final Group group = new Group(shell, SWT.NONE); |
| group.setText("some group"); |
| group.setLayout(new FillLayout()); |
| |
| final Image image = new Image(display, 40, 40); |
| GC gc = new GC(image); |
| gc.setBackground(display.getSystemColor(SWT.COLOR_DARK_RED)); |
| gc.fillRectangle(0, 0, 40, 40); |
| gc.dispose(); |
| |
| class DrawSquare implements PaintListener { |
| @Override |
| public void paintControl(PaintEvent e) { |
| GC gc = e.gc; |
| gc.drawImage(image, 0, 0); |
| } |
| } |
| group.addPaintListener(new DrawSquare()); |
| |
| shell.open(); |
| |
| while (!shell.isDisposed()) { |
| if (!display.readAndDispatch()) { |
| display.sleep(); |
| } |
| } |
| display.dispose(); |
| } |
| } |