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