org.eclipse.swt.snippets.Snippet70.java Source code

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Here is the source code for org.eclipse.swt.snippets.Snippet70.java

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/*******************************************************************************
 * Copyright (c) 2000, 2015 IBM Corporation and others.
 *
 * This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License 2.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.swt.snippets;

/*
 * GC example snippet: create an icon (in memory)
 *
 * 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 Snippet70 {

    public static void main(String[] args) {
        Display display = new Display();
        Color red = display.getSystemColor(SWT.COLOR_RED);
        Color white = display.getSystemColor(SWT.COLOR_WHITE);
        Color black = display.getSystemColor(SWT.COLOR_BLACK);

        Image image = new Image(display, 20, 20);
        GC gc = new GC(image);
        gc.setBackground(red);
        gc.fillRectangle(5, 5, 10, 10);
        gc.dispose();
        ImageData imageData = image.getImageData();

        PaletteData palette = new PaletteData(new RGB(0, 0, 0), new RGB(0xFF, 0xFF, 0xFF));
        ImageData maskData = new ImageData(20, 20, 1, palette);
        Image mask = new Image(display, maskData);
        gc = new GC(mask);
        gc.setBackground(black);
        gc.fillRectangle(0, 0, 20, 20);
        gc.setBackground(white);
        gc.fillRectangle(5, 5, 10, 10);
        gc.dispose();
        maskData = mask.getImageData();

        Image icon = new Image(display, imageData, maskData);
        Shell shell = new Shell(display);
        shell.setText("Snippet 70");
        Button button = new Button(shell, SWT.PUSH);
        button.setImage(icon);
        button.setSize(60, 60);
        shell.open();
        while (!shell.isDisposed()) {
            if (!display.readAndDispatch())
                display.sleep();
        }
        icon.dispose();
        image.dispose();
        mask.dispose();
        display.dispose();
    }
}