imagebuttondemo.java

java图形界面开发

import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.*;
import org.eclipse.swt.widgets.*;

public class ImageButtonDemo {

	public static Display myDisplay;
	public static boolean internalCall = false;

	public static void main(String[] args) {
		internalCall = true;
		myDisplay = new Display();
		ImageButtonDemo id = new ImageButtonDemo();
		id.runDemo(myDisplay);
	}
	
	public void runDemo(Display display) {
		myDisplay = display;
		Shell shell = new Shell(display);
		shell.setSize(180,320);
		shell.setText("Image Button Demo");

		//load an image from a JPEG file
		Image original = new Image(display, "EclipseBannerPic.jpg");		

		//create a duplicate image with 3 different values for flag
		Image copy = new Image(display, original, SWT.IMAGE_COPY);
		Image gray = new Image(display, original, SWT.IMAGE_GRAY);
		Image disable = new Image(display, original, SWT.IMAGE_DISABLE);

		//create, size, and position 3 buttons
		Button b1 = new Button(shell, SWT.PUSH);
		b1.setSize(150,80);
		b1.setLocation(10,10);
		Button b2 = new Button(shell, SWT.PUSH);
		b2.setSize(150,80);
		b2.setLocation(10,100);
		Button b3 = new Button(shell, SWT.PUSH);
		b3.setSize(150,80);
		b3.setLocation(10,190);

		//set the image for each button
		b1.setImage(copy);
		b2.setImage(gray);
		b3.setImage(disable);
		
		//open the shell, so we can draw on it
		shell.open();

		while (!shell.isDisposed()) {
			if (!display.readAndDispatch())
				display.sleep();
		}
		
		copy.dispose();
		gray.dispose();
		disable.dispose();
		original.dispose();
		
		if (internalCall) display.dispose();

	}
	
}