| /******************************************************************************* |
| * 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 various line joins. It allows a user to choose from |
| * bevel, miter and round. |
| */ |
| public class LineJoinTab extends GraphicsTab { |
| |
| private Combo joinCb; |
| private Button colorButton; |
| private GraphicsBackground shapeColor; |
| private Menu menu; |
| private int [] joinValues = new int [] {SWT.JOIN_BEVEL, SWT.JOIN_MITER, SWT.JOIN_ROUND}; |
| |
| public LineJoinTab(GraphicsExample example) { |
| super(example); |
| } |
| |
| public String getCategory() { |
| return GraphicsExample.getResourceString("Lines"); //$NON-NLS-1$ |
| } |
| |
| public String getText() { |
| return GraphicsExample.getResourceString("LineJoin"); //$NON-NLS-1$ |
| } |
| |
| public String getDescription() { |
| return GraphicsExample.getResourceString("LineJoinDescription"); //$NON-NLS-1$ |
| } |
| |
| public void dispose() { |
| if (menu != null) { |
| menu.dispose(); |
| menu = null; |
| } |
| } |
| |
| 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("LineJoin")); //$NON-NLS-1$ |
| joinCb = new Combo(comp, SWT.DROP_DOWN); |
| joinCb.add(GraphicsExample |
| .getResourceString("bevel")); //$NON-NLS-1$ |
| joinCb.add(GraphicsExample |
| .getResourceString("miter")); //$NON-NLS-1$ |
| joinCb.add(GraphicsExample |
| .getResourceString("round")); //$NON-NLS-1$ |
| joinCb.select(1); |
| joinCb.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) { |
| shapeColor = gb; |
| colorButton.setImage(gb.getThumbNail()); |
| example.redraw(); |
| } |
| }); |
| |
| // initialize the shape color to the 4th item in the menu (green) |
| shapeColor =(GraphicsBackground)menu.getItem(3).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(shapeColor.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(); |
| |
| gc.setLineWidth(20); |
| gc.setLineJoin(joinValues[joinCb.getSelectionIndex()]); |
| |
| // set the foreground color or pattern |
| Pattern pattern = null; |
| if (shapeColor.getBgColor1() != null) { |
| gc.setForeground(shapeColor.getBgColor1()); |
| } else if (shapeColor.getBgImage() != null) { |
| pattern = new Pattern(device, shapeColor.getBgImage()); |
| gc.setForegroundPattern(pattern); |
| } |
| |
| // draw the shape |
| Path path = new Path(device); |
| path.moveTo(width/2, 25); |
| path.lineTo(2*width/3, height/3); |
| path.lineTo(width-25, height/2); |
| path.lineTo(2*width/3, 2*height/3); |
| path.lineTo(width/2, height-25); |
| path.lineTo(width/3, 2*height/3); |
| path.lineTo(25, height/2); |
| path.lineTo(width/3, height/3); |
| path.lineTo(width/2, 25); |
| path.close(); |
| gc.drawPath(path); |
| path.dispose(); |
| |
| if (pattern != null) pattern.dispose(); |
| } |
| |
| } |
| |
| |