snippet92.java

Eclipse JAVA开发软件中SWT各控件范例源码

/*******************************************************************************
 * Copyright (c) 2000, 2004 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.snippets;

/*
 * Cursor example snippet: create a cursor from a source and a mask
 *
 * For a list of all SWT example snippets see
 * http://www.eclipse.org/swt/snippets/
 */
import org.eclipse.swt.*;
import org.eclipse.swt.events.*;
import org.eclipse.swt.graphics.*;
import org.eclipse.swt.widgets.*;

public class Snippet92 {

public static void main (String [] args) {
	Display display = new Display();
	Color white = display.getSystemColor (SWT.COLOR_WHITE);
	Color black = display.getSystemColor (SWT.COLOR_BLACK);
	
	//Create a source ImageData of depth 1 (monochrome)
	PaletteData palette = new PaletteData (new RGB [] {white.getRGB(), black.getRGB(),});
	ImageData sourceData = new ImageData (20, 20, 1, palette);
	for (int i = 0; i < 10; i ++) {
		for (int j = 0; j < 20; j++) {
			sourceData.setPixel(i, j, 1);
		}
	}
	
	//Create a mask ImageData of depth 1 (monochrome)
	palette = new PaletteData (new RGB [] {white.getRGB(), black.getRGB(),});
	ImageData maskData = new ImageData (20, 20, 1, palette);
	for (int i = 0; i < 20; i ++) {
		for (int j = 0; j < 10; j++) {
			maskData.setPixel(i, j, 1);
		}
	}
	//Create cursor
	Cursor cursor = new Cursor(display, sourceData, maskData, 10, 10);
	
	Shell shell = new Shell(display);
	final Image source = new Image (display,sourceData);
	final Image mask = new Image (display, maskData);
	//Draw source and mask just to show what they look like
	shell.addPaintListener(new PaintListener() {
		public void paintControl(PaintEvent e) {
			GC gc = e.gc;
			gc.drawString("source: ", 10, 10);
			gc.drawImage(source, 0, 0, 20, 20, 60, 10, 20, 20);
			gc.drawString("mask: ",10, 40);
			gc.drawImage(mask, 0, 0, 20, 20, 60, 40, 20, 20);
		}
	});
	shell.setSize(150, 150);
	shell.open();
	shell.setCursor(cursor);
	
	while (!shell.isDisposed()) {
		if (!display.readAndDispatch())
			display.sleep();
	}
	cursor.dispose();
	source.dispose();
	mask.dispose();
	display.dispose();
}
}