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/*******************************************************************************
* 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();
}
}
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