| /******************************************************************************* |
| * 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 tab demonstrates how to apply a path clipping and the effects of |
| * applying one. |
| */ |
| public class PathClippingTab extends GraphicsTab { |
| |
| private Combo clippingCb; |
| private Button colorButton; |
| private GraphicsBackground background; |
| private Menu menu; |
| |
| public PathClippingTab(GraphicsExample example) { |
| super(example); |
| } |
| |
| public String getCategory() { |
| return GraphicsExample.getResourceString("Clipping"); //$NON-NLS-1$ |
| } |
| |
| public String getText() { |
| return GraphicsExample.getResourceString("PathClipping"); //$NON-NLS-1$ |
| } |
| |
| public String getDescription() { |
| return GraphicsExample.getResourceString("PathClippingDesc"); //$NON-NLS-1$ |
| } |
| |
| public void dispose() { |
| if (menu != null) { |
| menu.dispose(); |
| menu = null; |
| } |
| } |
| |
| /** |
| * Creates the widgets used to control the drawing. |
| */ |
| public void createControlPanel(Composite parent) { |
| |
| // create drop down combo for choosing clipping |
| Composite comp = new Composite(parent, SWT.NONE); |
| comp.setLayout(new GridLayout(2, false)); |
| |
| new Label(comp, SWT.CENTER).setText(GraphicsExample |
| .getResourceString("Clipping")); //$NON-NLS-1$ |
| clippingCb = new Combo(comp, SWT.DROP_DOWN); |
| clippingCb.add(GraphicsExample.getResourceString("Circles")); //$NON-NLS-1$ |
| clippingCb.add(GraphicsExample.getResourceString("Rectangle")); //$NON-NLS-1$ |
| clippingCb.add(GraphicsExample.getResourceString("Oval")); //$NON-NLS-1$ |
| clippingCb.add(GraphicsExample.getResourceString("Word")); //$NON-NLS-1$ |
| clippingCb.add(GraphicsExample.getResourceString("Star")); //$NON-NLS-1$ |
| clippingCb.add(GraphicsExample.getResourceString("Triangles")); //$NON-NLS-1$ |
| clippingCb.add(GraphicsExample.getResourceString("Default")); //$NON-NLS-1$ |
| clippingCb.select(0); |
| clippingCb.addListener(SWT.Selection, new Listener() { |
| public void handleEvent(Event event) { |
| example.redraw(); |
| } |
| }); |
| |
| // 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 |
| 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 paint(GC gc, int width, int height) { |
| if (!example.checkAdvancedGraphics()) return; |
| Device device = gc.getDevice(); |
| |
| int clipping = clippingCb.getSelectionIndex(); |
| switch (clipping) { |
| |
| case 0: // circles |
| Path path = new Path(device); |
| path.addArc((width-width/5)/2, (height-height/5)/2, width/5, height/5, 0, 360); |
| path.addArc(5*(width-width/8)/12, 4*(height-height/8)/12, width/8, height/8, 0, 360); |
| path.addArc(7*(width-width/8)/12, 8*(height-height/8)/12, width/8, height/8, 0, 360); |
| path.addArc(6*(width-width/12)/12, 3*(height-height/12)/12, width/12, height/12, 0, 360); |
| path.addArc(6*(width-width/12)/12, 9*(height-height/12)/12, width/12, height/12, 0, 360); |
| path.addArc(11.5f*(width-width/18)/20, 5*(height-height/18)/18, width/18, height/18, 0, 360); |
| path.addArc(8.5f*(width-width/18)/20, 13*(height-height/18)/18, width/18, height/18, 0, 360); |
| gc.setClipping(path); |
| path.dispose(); |
| break; |
| case 1: // rectangle |
| path = new Path(device); |
| path.addRectangle(100, 100, width-200, height-200); |
| path.addRectangle(120, 120, width-240, height-240); |
| path.addRectangle(140, 140, width-280, height-280); |
| gc.setClipping(path); |
| path.dispose(); |
| break; |
| case 2: // circle |
| path = new Path(device); |
| path.addArc(100, 100, width-200, height-200, 0, 360); |
| path.addArc((width-width/5)/2, (height-height/5)/2, width/5, height/5, 0, 360); |
| path.addArc(5*(width-width/8)/12, 4*(height-height/8)/12, width/8, height/8, 0, 360); |
| path.addArc(7*(width-width/8)/12, 8*(height-height/8)/12, width/8, height/8, 0, 360); |
| path.addArc(6*(width-width/12)/12, 3*(height-height/12)/12, width/12, height/12, 0, 360); |
| path.addArc(6*(width-width/12)/12, 9*(height-height/12)/12, width/12, height/12, 0, 360); |
| path.addArc(11.5f*(width-width/18)/20, 5*(height-height/18)/18, width/18, height/18, 0, 360); |
| path.addArc(8.5f*(width-width/18)/20, 13*(height-height/18)/18, width/18, height/18, 0, 360); |
| gc.setClipping(path); |
| path.dispose(); |
| break; |
| case 3: // word |
| path = new Path(device); |
| String text = GraphicsExample.getResourceString("SWT"); //$NON-NLS-1$ |
| Font font = new Font(device, "Times", 200, SWT.NORMAL); |
| gc.setFont(font); |
| Point size = gc.stringExtent(text); |
| path.addString(text, (width-size.x)/2, (height-size.y)/2, font); |
| font.dispose(); |
| gc.setClipping(path); |
| path.dispose(); |
| break; |
| case 4: // star |
| path = new Path(device); |
| path.lineTo(width/2, 0); |
| path.lineTo(5*width/8, height/3); |
| path.lineTo(width, height/3); |
| path.lineTo(3*width/4, 10*height/16); |
| path.lineTo(7*width/8, height); |
| path.lineTo(width/2, 3*height/4); |
| path.lineTo(width/8, height); |
| path.lineTo(width/4, 10*height/16); |
| path.lineTo(0, height/3); |
| path.lineTo(3*width/8, height/3); |
| path.lineTo(width/2, 0); |
| |
| Path ovalPath = new Path(device); |
| ovalPath.addArc(90, 90, width-180, height-180, 0, 360); |
| |
| path.addPath(ovalPath); |
| gc.setClipping(path); |
| ovalPath.dispose(); |
| path.dispose(); |
| break; |
| case 5: // triangles |
| path = new Path(device); |
| path.addRectangle(0, 0, width, height); |
| path.lineTo(width/4, 0); |
| path.lineTo(width/4, height/2); |
| path.lineTo(0, height/2); |
| path.lineTo(width/4, 0); |
| |
| Path path2 = new Path(device); |
| path2.lineTo(width/2, 0); |
| path2.lineTo(width/4, height/2); |
| path2.lineTo(3*width/4, height/2); |
| path2.lineTo(width/2, 0); |
| |
| Path path3 = new Path(device); |
| path3.lineTo(3*width/4, 0); |
| path3.lineTo(3*width/4, height/2); |
| path3.lineTo(width, height/2); |
| path3.lineTo(3*width/4, 0); |
| |
| Path path4 = new Path(device); |
| path4.lineTo(0, height); |
| path4.lineTo(width/4, height/2); |
| path4.lineTo(width/2, height); |
| path4.lineTo(0, height); |
| |
| Path path5 = new Path(device); |
| path5.lineTo(width/2, height); |
| path5.lineTo(3*width/4, height/2); |
| path5.lineTo(width, height); |
| path5.lineTo(width/2, height); |
| |
| path.addPath(path2); |
| path.addPath(path3); |
| path.addPath(path4); |
| path.addPath(path5); |
| gc.setClipping(path); |
| |
| path5.dispose(); |
| path4.dispose(); |
| path3.dispose(); |
| path2.dispose(); |
| path.dispose(); |
| break; |
| case 6: // default |
| gc.setClipping(0, 0, width, height); |
| break; |
| } |
| |
| 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.fillRectangle(0, 0, width, height); |
| if (pattern != null) pattern.dispose(); |
| } |
| } |