| package org.eclipse.swt.tests.gtk.snippets; |
| |
| |
| /******************************************************************************* |
| * Copyright (c) 2000, 2018 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.snippets; |
| /* |
| * Small modifications to test the clipping for an RTL widget.tree. |
| * |
| * Tree example snippet: Images on the right side of the TreeItem |
| * |
| * For a widget.list of all SWT example snippets see |
| * http://www.eclipse.org/swt/snippets/ |
| * |
| * @since 3.2 |
| */ |
| |
| import org.eclipse.swt.*; |
| import org.eclipse.swt.graphics.*; |
| import org.eclipse.swt.layout.*; |
| import org.eclipse.swt.widgets.*; |
| |
| public class Bug175964_LTRClippingGC { |
| static Color lightGray; |
| public static void main(String [] args) { |
| Display display = new Display(); |
| lightGray = new Color(null, 192, 192, 192); |
| final Image image = display.getSystemImage(SWT.ICON_INFORMATION); |
| Shell shell = new Shell(display); |
| shell.setText("Clipping rectangle for an RTL widget.tree");//"Images on the right side of the TreeItem"); |
| shell.setLayout(new FillLayout ()); |
| Tree tree = new Tree(shell, SWT.MULTI | SWT.FULL_SELECTION | SWT.RIGHT_TO_LEFT); |
| tree.setHeaderVisible(true); |
| tree.setLinesVisible(true); |
| int columnCount = 1;//4; |
| for(int i = 0; i < columnCount; i++) { |
| TreeColumn column = new TreeColumn(tree, SWT.NONE); |
| column.setText("Column " + i); |
| } |
| int itemCount = 3; |
| for (int i=0; i<itemCount; i++) { |
| TreeItem item1 = new TreeItem(tree, SWT.NONE); |
| item1.setText("item "+i); |
| for (int c=1; c < columnCount; c++) { |
| item1.setText(c, "item ["+i+"-"+c+"]"); |
| } |
| for (int j=0; j<itemCount; j++) { |
| TreeItem item2 = new TreeItem(item1, SWT.NONE); |
| item2.setText("item ["+i+" "+j+"]"); |
| for (int c=1; c<columnCount; c++) { |
| item2.setText(c, "item ["+i+" "+j+"-"+c+"]"); |
| } |
| for (int k=0; k<itemCount; k++) { |
| TreeItem item3 = new TreeItem(item2, SWT.NONE); |
| item3.setText("item ["+i+" "+j+" "+k+"]"); |
| for (int c=1; c<columnCount; c++) { |
| item3.setText(c, "item ["+i+" "+j+" "+k+"-"+c+"]"); |
| } |
| } |
| } |
| } |
| /* |
| * NOTE: MeasureItem, PaintItem and EraseItem are called repeatedly. |
| * Therefore, it is critical for performance that these methods be |
| * as efficient as possible. |
| */ |
| Listener paintListener = new Listener() { |
| @Override |
| public void handleEvent(Event event) { |
| switch(event.type) { |
| // case SWT.MeasureItem: { |
| // Rectangle rect = graphics.image.getBounds(); |
| // event.width += rect.width; |
| // event.height = Math.max(event.height, rect.height + 2); |
| // break; |
| // } |
| case SWT.PaintItem: { |
| // int x = event.x + event.width; |
| // Rectangle rect = graphics.image.getBounds(); |
| // int offset = Math.max(0, (event.height - rect.height) / 2); |
| // event.gc.drawImage(graphics.image, x, event.y + offset); |
| event.gc.setBackground(lightGray); |
| event.gc.fillRectangle(event.gc.getClipping()); |
| break; |
| } |
| } |
| } |
| }; |
| tree.addListener(SWT.MeasureItem, paintListener); |
| tree.addListener(SWT.PaintItem, paintListener); |
| |
| for(int i = 0; i < columnCount; i++) { |
| tree.getColumn(i).pack(); |
| } |
| shell.setSize(500, 200); |
| shell.open(); |
| while(!shell.isDisposed ()) { |
| if(!display.readAndDispatch()) display.sleep(); |
| } |
| if(image != null) image.dispose(); |
| display.dispose(); |
| } |
| } |