| /******************************************************************************* |
| * Copyright (c) 2000, 2006 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.examples.graphics; |
| |
| import java.util.*; |
| |
| import org.eclipse.swt.*; |
| import org.eclipse.swt.graphics.*; |
| |
| public class IntroTab extends AnimatedGraphicsTab { |
| |
| Font font; |
| Image image; |
| Random random = new Random(); |
| float x, y; |
| float incX = 10.0f; |
| float incY = 5.0f; |
| int textWidth, textHeight; |
| String text = GraphicsExample.getResourceString("SWT"); |
| |
| public IntroTab(GraphicsExample example) { |
| super(example); |
| } |
| |
| public void dispose() { |
| if (image != null) image.dispose(); |
| image = null; |
| if (font != null) font.dispose(); |
| font = null; |
| } |
| |
| public String getCategory() { |
| return GraphicsExample.getResourceString("Introduction"); //$NON-NLS-1$ |
| } |
| |
| public String getText() { |
| return GraphicsExample.getResourceString("SWT"); //$NON-NLS-1$ |
| } |
| |
| public String getDescription() { |
| return GraphicsExample.getResourceString("IntroductionDescription"); //$NON-NLS-1$ |
| } |
| |
| public void next(int width, int height) { |
| x += incX; |
| y += incY; |
| float random = (float)Math.random(); |
| if (x + textWidth > width) { |
| x = width - textWidth; |
| incX = random * -width / 16 - 1; |
| } |
| if (x < 0) { |
| x = 0; |
| incX = random * width / 16 + 1; |
| } |
| if (y + textHeight > height) { |
| y = (height - textHeight)- 2; |
| incY = random * -height / 16 - 1; |
| } |
| if (y < 0) { |
| y = 0; |
| incY = random * height / 16 + 1; |
| } |
| } |
| |
| public void paint(GC gc, int width, int height) { |
| if (!example.checkAdvancedGraphics()) return; |
| Device device = gc.getDevice(); |
| if (image == null) { |
| image = example.loadImage(device, "irmaos.jpg"); |
| Rectangle rect = image.getBounds(); |
| FontData fd = device.getSystemFont().getFontData()[0]; |
| font = new Font(device, fd.getName(), rect.height / 4, SWT.BOLD); |
| gc.setFont(font); |
| Point size = gc.stringExtent(text); |
| textWidth = size.x; |
| textHeight = size.y; |
| } |
| Path path = new Path(device); |
| path.addString(text, x, y, font); |
| gc.setClipping(path); |
| Rectangle rect = image.getBounds(); |
| gc.drawImage(image, 0, 0, rect.width, rect.height, 0, 0, width, height); |
| gc.setClipping((Rectangle)null); |
| gc.setForeground(device.getSystemColor(SWT.COLOR_BLUE)); |
| gc.drawPath(path); |
| path.dispose(); |
| } |
| } |