| /******************************************************************************* |
| * 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 antialiasing for graphics. Antialiasing is used for |
| * smoothing jagged edges in graphics. This tab allows the user to see the |
| * effects of different antialiasing values. |
| */ |
| public class GraphicAntialiasTab extends GraphicsTab { |
| |
| Combo aliasCombo; |
| int[] aliasValues = { SWT.OFF, SWT.DEFAULT, SWT.ON }; |
| |
| Button colorButton; |
| Menu menu; |
| GraphicsBackground ovalColorGB; |
| |
| |
| public GraphicAntialiasTab(GraphicsExample example) { |
| super(example); |
| } |
| |
| public String getCategory() { |
| return GraphicsExample.getResourceString("Antialiasing"); //$NON-NLS-1$ |
| } |
| |
| public String getText() { |
| return GraphicsExample.getResourceString("Graphics"); //$NON-NLS-1$ |
| } |
| |
| public String getDescription() { |
| return GraphicsExample.getResourceString("AntialiasingGraphicsDesc"); //$NON-NLS-1$ |
| } |
| |
| public void dispose() { |
| if (menu != null) { |
| menu.dispose(); |
| menu = null; |
| } |
| } |
| |
| public void createControlPanel(Composite parent) { |
| |
| Composite comp; |
| |
| // create drop down combo for antialiasing |
| comp = new Composite(parent, SWT.NONE); |
| comp.setLayout(new GridLayout(2, false)); |
| new Label(comp, SWT.CENTER).setText(GraphicsExample |
| .getResourceString("Antialiasing")); //$NON-NLS-1$ |
| aliasCombo = new Combo(comp, SWT.DROP_DOWN); |
| aliasCombo.add("OFF"); |
| aliasCombo.add("DEFAULT"); |
| aliasCombo.add("ON"); |
| aliasCombo.select(0); |
| aliasCombo.addListener(SWT.Selection, new Listener() { |
| public void handleEvent(Event event) { |
| example.redraw(); |
| } |
| }); |
| |
| ColorMenu cm = new ColorMenu(); |
| cm.setColorItems(true); |
| menu = cm.createMenu(parent.getParent(), new ColorListener() { |
| public void setColor(GraphicsBackground gb) { |
| ovalColorGB = gb; |
| colorButton.setImage(gb.getThumbNail()); |
| example.redraw(); |
| } |
| }); |
| |
| // create color button |
| comp = new Composite(parent, SWT.NONE); |
| comp.setLayout(new GridLayout()); |
| |
| // initialize the background to the 5th item in the menu (blue) |
| ovalColorGB = (GraphicsBackground)menu.getItem(4).getData(); |
| |
| // color button |
| colorButton = new Button(comp, SWT.PUSH); |
| colorButton.setText(GraphicsExample.getResourceString("Color")); //$NON-NLS-1$ |
| colorButton.setImage(ovalColorGB.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); |
| } |
| }); |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.swt.examples.graphics.GraphicsTab#paint(org.eclipse.swt.graphics.GC, int, int) |
| */ |
| public void paint(GC gc, int width, int height) { |
| if (!example.checkAdvancedGraphics()) return; |
| Device device = gc.getDevice(); |
| |
| if (ovalColorGB != null && ovalColorGB.getBgColor1() != null) |
| gc.setBackground(ovalColorGB.getBgColor1()); |
| |
| gc.setAntialias(aliasValues[aliasCombo.getSelectionIndex()]); |
| |
| Path path = new Path(device); |
| float offsetX = 2*width/3f, offsetY = height/3f; |
| for(int i=0; i < 25; i++) { |
| path.addArc(offsetX-(50*i), offsetY-(25*i), 50+(100*i), 25+(50*i), 0, 360); |
| } |
| gc.fillPath(path); |
| path.dispose(); |
| } |
| } |
| |