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/*******************************************************************************
* Copyright (c) 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 org.eclipse.swt.*;
import org.eclipse.swt.graphics.*;
import org.eclipse.swt.layout.*;
import org.eclipse.swt.widgets.*;
/**
* This is another tab that demonstrates the use of a path clipping.
*/
public class PathClippingAnimTab extends AnimatedGraphicsTab {
private Button colorButton;
private GraphicsBackground background;
private Menu menu;
private int rectWidth = 300;
private int rectHeight = 300;
private int incWidth = 5;
private int incHeight = 5;
private boolean vertical = false;
private int angle;
public PathClippingAnimTab(GraphicsExample example) {
super(example);
}
public String getCategory() {
return GraphicsExample.getResourceString("Clipping"); //$NON-NLS-1$
}
public String getText() {
return GraphicsExample.getResourceString("AnimPathClipping"); //$NON-NLS-1$
}
public String getDescription() {
return GraphicsExample.getResourceString("AnimPathClippingDesc"); //$NON-NLS-1$
}
public void dispose() {
if (menu != null) {
menu.dispose();
menu = null;
}
}
/**
* Creates the widgets used to control the drawing.
*/
public void createControlPanel(Composite parent) {
super.createControlPanel(parent);
// color menu
ColorMenu cm = new ColorMenu();
cm.setPatternItems(example.checkAdvancedGraphics());
menu = cm.createMenu(parent.getParent(), new ColorListener() {
public void setColor(GraphicsBackground gb) {
background = gb;
colorButton.setImage(gb.getThumbNail());
example.redraw();
}
});
// initialize the background to the 5th item in the menu (blue)
background = (GraphicsBackground) menu.getItem(4).getData();
// color button
Composite comp = new Composite(parent, SWT.NONE);
comp.setLayout(new GridLayout(2, false));
colorButton = new Button(comp, SWT.PUSH);
colorButton.setText(GraphicsExample.getResourceString("Color")); //$NON-NLS-1$
colorButton.setImage(background.getThumbNail());
colorButton.addListener(SWT.Selection, new Listener() {
public void handleEvent(Event event) {
final Button button = (Button) event.widget;
final Composite parent = button.getParent();
Rectangle bounds = button.getBounds();
Point point = parent.toDisplay(new Point(bounds.x, bounds.y));
menu.setLocation(point.x, point.y + bounds.height);
menu.setVisible(true);
}
});
}
public void next(int width, int height) {
angle = (angle + 5)%360;
if (vertical) {
if (rectHeight <= 0) {
incHeight = -incHeight;
}
if (rectHeight >= height) {
incHeight = -incHeight;
vertical = false;
}
rectHeight = rectHeight + incHeight;
} else {
if (rectWidth <= 0) {
incWidth = -incWidth;
}
if (rectWidth >= width) {
incWidth = -incWidth;
vertical = true;
}
rectWidth = rectWidth + incWidth;
}
}
public void paint(GC gc, int width, int height) {
if (!example.checkAdvancedGraphics()) return;
Device device = gc.getDevice();
// top triangle
Path path = new Path(device);
path.moveTo(width/2, 0);
path.lineTo(width/2+100, 173);
path.lineTo(width/2-100, 173);
path.lineTo(width/2, 0);
// bottom triangle
Path path2 = new Path(device);
path2.moveTo(width/2, height);
path2.lineTo(width/2+100, height-173);
path2.lineTo(width/2-100, height-173);
path2.lineTo(width/2, height);
// left triangle
Path path3 = new Path(device);
path3.moveTo(0, height/2);
path3.lineTo(173, height/2-100);
path3.lineTo(173, height/2+100);
path3.lineTo(0, height/2);
// right triangle
Path path4 = new Path(device);
path4.moveTo(width, height/2);
path4.lineTo(width-173, height/2-100);
path4.lineTo(width-173, height/2+100);
path4.lineTo(width, height/2);
// circle
Path path5 = new Path(device);
path5.moveTo((width-200)/2, (height-200)/2);
path5.addArc((width-200)/2, (height-200)/2, 200, 200, 0, 360);
// top rectangle
Path path6 = new Path(device);
path6.addRectangle((width-40)/2, 175, 40, ((height-200)/2)-177);
// bottom rectangle
Path path7 = new Path(device);
path7.addRectangle((width-40)/2, ((height-200)/2)+202, 40, (height-175)-(((height-200)/2)+202));
// left rectangle
Path path8 = new Path(device);
path8.addRectangle(175, (height-40)/2, ((width-200)/2)-177, 40);
// right rectangle
Path path9 = new Path(device);
path9.addRectangle((width-200)/2+202, (height-40)/2, (width-175)-((width-200)/2+202), 40);
path.addPath(path2);
path.addPath(path3);
path.addPath(path4);
path.addPath(path5);
path.addPath(path6);
path.addPath(path7);
path.addPath(path8);
path.addPath(path9);
gc.setClipping(path);
Pattern pattern = null;
if (background.getBgColor1() != null) {
gc.setBackground(background.getBgColor1());
} else if (background.getBgImage() != null) {
pattern = new Pattern(device, background.getBgImage());
gc.setBackgroundPattern(pattern);
}
gc.setLineWidth(2);
gc.fillRectangle((width-rectWidth)/2, (height-rectHeight)/2, rectWidth, rectHeight);
gc.drawPath(path);
if (pattern != null)
pattern.dispose();
path9.dispose();
path8.dispose();
path7.dispose();
path6.dispose();
path5.dispose();
path4.dispose();
path3.dispose();
path2.dispose();
path.dispose();
}
}
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