| /******************************************************************************* |
| * 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.manual; |
| |
| import org.eclipse.swt.SWT; |
| import org.eclipse.swt.custom.SashForm; |
| import org.eclipse.swt.graphics.Color; |
| import org.eclipse.swt.graphics.GC; |
| import org.eclipse.swt.layout.FillLayout; |
| import org.eclipse.swt.widgets.Composite; |
| import org.eclipse.swt.widgets.Display; |
| import org.eclipse.swt.widgets.Event; |
| import org.eclipse.swt.widgets.Label; |
| import org.eclipse.swt.widgets.Listener; |
| import org.eclipse.swt.widgets.Shell; |
| import org.eclipse.swt.widgets.Tree; |
| import org.eclipse.swt.widgets.TreeItem; |
| |
| /** |
| * Description: Resizing part stack of Package Explorer doesn't always show bottom rows. |
| * |
| * <ol> |
| * <li>Open Package Explorer.</li> |
| * <li>Move another view in a part stack below the Package Explorer part stack.</li> |
| * <li>Move the sash between the two part stacks, so that the Package Explorer view has an increased height.</li> |
| * </ol> |
| * Expected results: Package Explorer tree is resized and all rows are visible. |
| * Actual results: Often, the text and icons of a few of the bottom rows are not painted. |
| */ |
| public class Bug537960_resize_Tree_in_SashForm { |
| public static void main(String[] args) { |
| Display display = new Display(); |
| Shell shell = new Shell(display); |
| shell.setLayout(new FillLayout(SWT.VERTICAL)); |
| shell.setSize(450, 300); |
| shell.setText("Bug 537960: Tree rows not painted on resize"); |
| |
| SashForm sashForm = new SashForm(shell, SWT.VERTICAL); |
| |
| tree(sashForm); |
| |
| Label label = new Label(sashForm, SWT.BORDER); |
| label.setText("move sash down"); |
| |
| shell.open(); |
| |
| while (!shell.isDisposed()) { |
| if (!display.readAndDispatch()) |
| display.sleep(); |
| } |
| display.dispose(); |
| } |
| |
| private static void tree(Composite parent) { |
| Display display = parent.getDisplay(); |
| final Color darkGreen = display.getSystemColor(SWT.COLOR_DARK_GREEN); |
| |
| Composite composite = new Composite(parent, SWT.BORDER); |
| composite.setLayout(new FillLayout(SWT.VERTICAL)); |
| |
| Tree tree = new Tree(composite, SWT.NONE); |
| for (int i = 0; i < 20; ++i) { |
| TreeItem item = new TreeItem(tree, SWT.NONE); |
| item.setText("item " + i); |
| } |
| |
| class PaintListener implements Listener { |
| @Override |
| public void handleEvent(Event event) { |
| if (event.type == SWT.PaintItem) { |
| TreeItem item = (TreeItem) event.item; |
| GC gc = event.gc; |
| gc.setBackground(darkGreen); |
| gc.setAlpha(55); |
| gc.fillRectangle(item.getBounds()); |
| } |
| } |
| } |
| |
| class MeasureListener implements Listener { |
| @Override |
| public void handleEvent(Event event) { |
| /* |
| * An item measure listener needs to be registered, for the problem to be seen. |
| * The listener doesn't need to actually do something. |
| */ |
| } |
| } |
| |
| tree.addListener(SWT.PaintItem, new PaintListener()); |
| |
| boolean addMeasureListener = true; // if we don't add a measure listener, the bug is not seen |
| if (addMeasureListener) { |
| tree.addListener(SWT.MeasureItem, new MeasureListener()); |
| } |
| } |
| } |