| /******************************************************************************* |
| * Copyright (c) 2000, 2005 IBM Corporation and others. |
| * All rights reserved. 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 |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.swt.snippets; |
| |
| /* |
| * Use transformation matrices to reflect, rotate and shear images |
| * |
| * For a list of all SWT example snippets see |
| * http://www.eclipse.org/swt/snippets/ |
| */ |
| import org.eclipse.swt.*; |
| import org.eclipse.swt.events.*; |
| import org.eclipse.swt.graphics.*; |
| import org.eclipse.swt.layout.*; |
| import org.eclipse.swt.widgets.*; |
| |
| public class Snippet207 { |
| public static void main(String[] args) { |
| final Display display = new Display(); |
| |
| final Image image = new Image(display, 110, 60); |
| GC gc = new GC(image); |
| Font font = new Font(display, "Times", 30, SWT.BOLD); |
| gc.setFont(font); |
| gc.setBackground(display.getSystemColor(SWT.COLOR_RED)); |
| gc.fillRectangle(0, 0, 110, 60); |
| gc.setForeground(display.getSystemColor(SWT.COLOR_WHITE)); |
| gc.drawText("SWT", 10, 10, true); |
| font.dispose(); |
| gc.dispose(); |
| |
| final Rectangle rect = image.getBounds(); |
| Shell shell = new Shell(display); |
| shell.setText("Matrix Tranformations"); |
| shell.setLayout(new FillLayout()); |
| final Canvas canvas = new Canvas(shell, SWT.DOUBLE_BUFFERED); |
| canvas.addPaintListener(new PaintListener () { |
| public void paintControl(PaintEvent e) { |
| GC gc = e.gc; |
| gc.setAdvanced(true); |
| if (!gc.getAdvanced()){ |
| gc.drawText("Advanced graphics not supported", 30, 30, true); |
| return; |
| } |
| |
| // Original image |
| int x = 30, y = 30; |
| gc.drawImage(image, x, y); |
| x += rect.width + 30; |
| |
| Transform transform = new Transform(display); |
| |
| // Note that the tranform is applied to the whole GC therefore |
| // the coordinates need to be adjusted too. |
| |
| // Reflect around the y axis. |
| transform.setElements(-1, 0, 0, 1, 0 ,0); |
| gc.setTransform(transform); |
| gc.drawImage(image, -1*x-rect.width, y); |
| |
| x = 30; y += rect.height + 30; |
| |
| // Reflect around the x axis. |
| transform.setElements(1, 0, 0, -1, 0, 0); |
| gc.setTransform(transform); |
| gc.drawImage(image, x, -1*y-rect.height); |
| |
| x += rect.width + 30; |
| |
| // Reflect around the x and y axes |
| transform.setElements(-1, 0, 0, -1, 0, 0); |
| gc.setTransform(transform); |
| gc.drawImage(image, -1*x-rect.width, -1*y-rect.height); |
| |
| x = 30; y += rect.height + 30; |
| |
| // Shear in the x-direction |
| transform.setElements(1, 0, -1, 1, 0, 0); |
| gc.setTransform(transform); |
| gc.drawImage(image, 300, y); |
| |
| // Shear in y-direction |
| transform.setElements(1, -1, 0, 1, 0, 0); |
| gc.setTransform(transform); |
| gc.drawImage(image, 150, 475); |
| |
| // Rotate by 45 degrees |
| float cos45 = (float)Math.cos(45); |
| float sin45 = (float)Math.sin(45); |
| transform.setElements(cos45, sin45, -sin45, cos45, 0, 0); |
| gc.setTransform(transform); |
| gc.drawImage(image, 350, 100); |
| |
| transform.dispose(); |
| } |
| }); |
| |
| shell.setSize(350, 550); |
| shell.open(); |
| while (!shell.isDisposed()) { |
| if (!display.readAndDispatch()) |
| display.sleep(); |
| } |
| image.dispose(); |
| display.dispose(); |
| } |
| } |
| |
| |
| |
| |