| /******************************************************************************* |
| * Copyright (c) 2018 Red Hat 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: |
| * Red Hat - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.swt.tests.gtk.snippets; |
| |
| import org.eclipse.swt.SWT; |
| import org.eclipse.swt.graphics.Color; |
| import org.eclipse.swt.graphics.GC; |
| import org.eclipse.swt.graphics.Rectangle; |
| import org.eclipse.swt.graphics.Region; |
| import org.eclipse.swt.layout.FillLayout; |
| import org.eclipse.swt.widgets.Display; |
| import org.eclipse.swt.widgets.Shell; |
| import org.eclipse.swt.widgets.Tree; |
| import org.eclipse.swt.widgets.TreeColumn; |
| import org.eclipse.swt.widgets.TreeItem; |
| |
| /* |
| * Title: Bug 529126: [Wayland][GTK3] Tree does not notify SWT.MouseDown listeners |
| * How to run: launch snippet and click on TreeItems |
| * Bug description: No output is printed to the console |
| * Expected results: Output with event info should be printed to the console for each |
| * mouse down. |
| * GTK Version(s): GTK3 (Wayland only) |
| */ |
| public class Bug529126_TreeMouseDown { |
| |
| // Static ================================================================= |
| |
| public static void main(String[] args) { |
| final Display display = new Display(); |
| final Shell shell = new Shell(display); |
| shell.setText("Custom gradient selection for Tree"); |
| shell.setLayout(new FillLayout()); |
| final Tree tree = new Tree(shell, SWT.MULTI | SWT.FULL_SELECTION | SWT.VIRTUAL); |
| tree.setHeaderVisible(true); |
| tree.setLinesVisible(true); |
| final int columnCount = 4; |
| for (int i = 0; i < columnCount; i++) { |
| final TreeColumn column = new TreeColumn(tree, SWT.NONE); |
| column.setText("Column " + i); |
| } |
| |
| final int itemCount = 5; |
| for (int i = 0; i < itemCount; i++) { |
| final TreeItem item1 = new TreeItem(tree, SWT.NONE); |
| |
| for (int j = 0; j < i; j++) { |
| final TreeItem item2 = new TreeItem(item1, SWT.NONE); |
| |
| for (int k = 0; k < j; k++) { |
| new TreeItem(item2, SWT.NONE); |
| } |
| } |
| } |
| |
| tree.addListener(SWT.SetData, event -> { |
| final TreeItem item = (TreeItem)event.item; |
| |
| final TreeItem parentItem = item.getParentItem(); |
| final String text; |
| |
| if (parentItem != null) { |
| final String parentText = (String)parentItem.getData(); |
| text = parentText + event.index + "/"; |
| } |
| else { |
| text = "/"; |
| } |
| |
| item.setData(text); |
| }); |
| |
| tree.addListener(SWT.PaintItem, event -> { |
| final TreeItem item = (TreeItem)event.item; |
| final String text = (String)item.getData(); |
| event.gc.drawText(text + " [" + event.index + "]", event.x, event.y, true); |
| }); |
| |
| /* |
| * NOTE: MeasureItem, PaintItem and EraseItem are called repeatedly. |
| * Therefore, it is critical for performance that these methods be |
| * as efficient as possible. |
| */ |
| tree.addListener(SWT.EraseItem, event -> { |
| event.detail &= ~SWT.HOT; |
| if ((event.detail & SWT.SELECTED) != 0) { |
| final GC gc = event.gc; |
| final Rectangle area = tree.getClientArea(); |
| /* |
| * If you wish to paint the selection beyond the end of |
| * last column, you must change the clipping region. |
| */ |
| final int columnCount1 = tree.getColumnCount(); |
| if (event.index == columnCount1 - 1 || columnCount1 == 0) { |
| final int width = area.x + area.width - event.x; |
| if (width > 0) { |
| final Region region = new Region(); |
| gc.getClipping(region); |
| region.add(event.x, event.y, width, event.height); |
| gc.setClipping(region); |
| region.dispose(); |
| } |
| } |
| gc.setAdvanced(true); |
| if (gc.getAdvanced()) { |
| gc.setAlpha(127); |
| } |
| final Rectangle rect = event.getBounds(); |
| final Color foreground = gc.getForeground(); |
| final Color background = gc.getBackground(); |
| gc.setForeground(display.getSystemColor(SWT.COLOR_RED)); |
| gc.setBackground(display.getSystemColor(SWT.COLOR_LIST_BACKGROUND)); |
| gc.fillGradientRectangle(0, rect.y, 500, rect.height, false); |
| // restore colors for subsequent drawing |
| gc.setForeground(foreground); |
| gc.setBackground(background); |
| event.detail &= ~SWT.SELECTED; |
| } |
| }); |
| tree.getColumn(0).setWidth(200); |
| for (int i = 1; i < columnCount; i++) { |
| tree.getColumn(i).pack(); |
| } |
| tree.setSelection(tree.getItem(0)); |
| |
| tree.addListener(SWT.MouseDown, event -> System.out.println("event = " + event)); |
| shell.setSize(500, 500); |
| shell.open(); |
| while (!shell.isDisposed()) { |
| if (!display.readAndDispatch()) { |
| display.sleep(); |
| } |
| } |
| display.dispose(); |
| } |
| } |