org.eclipse.swt.snippets.Snippet355.java Source code

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Here is the source code for org.eclipse.swt.snippets.Snippet355.java

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/*******************************************************************************
 * Copyright (c) 2000, 2016 IBM Corporation and others.
 *
 * This Example Content is intended to demonstrate
 * usage of Eclipse technology. It is provided to you under the terms and
 * conditions of the Eclipse Distribution License v1.0 which is available
 * at http://www.eclipse.org/org/documents/edl-v10.php
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.swt.snippets;

/*
 * draw an image scaled to half size and double size
 *
 * For a list of all SWT example snippets see
 * http://www.eclipse.org/swt/snippets/
 */
import org.eclipse.swt.*;
import org.eclipse.swt.graphics.*;
import org.eclipse.swt.widgets.*;

public class Snippet355 {
    public static void main(String[] args) {
        Display display = new Display();
        Shell shell = new Shell(display, SWT.SHELL_TRIM | SWT.DOUBLE_BUFFERED);
        shell.setText("Snippet 355");
        final Image image = display.getSystemImage(SWT.ICON_QUESTION);
        shell.addListener(SWT.Paint, e -> {
            Rectangle rect = image.getBounds();
            int width = rect.width;
            int height = rect.height;
            GC gc = e.gc;
            int x = 10, y = 10;
            gc.drawImage(image, 0, 0, width, height, x, y, width, height);
            gc.drawImage(image, 0, 0, width, height, x + width, y, (int) Math.round(width * 0.5),
                    (int) Math.round(height * 0.5));
            gc.drawImage(image, 0, 0, width, height, x + width + (int) Math.round(width * 0.5), y, width * 2,
                    height * 2);
        });
        shell.setSize(600, 400);
        shell.open();
        while (!shell.isDisposed()) {
            if (!display.readAndDispatch())
                display.sleep();
        }
        display.dispose();
    }
}