org.eclipse.swt.snippets.Snippet138.java Source code

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Here is the source code for org.eclipse.swt.snippets.Snippet138.java

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/*******************************************************************************
 * Copyright (c) 2000, 2006 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;

/*
 * example snippet: set icons with different resolutions
 *
 * For a list of all SWT example snippets see
 * http://www.eclipse.org/swt/snippets/
 *
 * @since 3.0
 */
import org.eclipse.swt.*;
import org.eclipse.swt.graphics.*;
import org.eclipse.swt.widgets.*;

public class Snippet138 {
    public static void main(String[] args) {
        Display display = new Display();

        Image small = new Image(display, 16, 16);
        GC gc = new GC(small);
        gc.setBackground(display.getSystemColor(SWT.COLOR_RED));
        gc.fillArc(0, 0, 16, 16, 45, 270);
        gc.dispose();

        Image large = new Image(display, 32, 32);
        gc = new GC(large);
        gc.setBackground(display.getSystemColor(SWT.COLOR_RED));
        gc.fillArc(0, 0, 32, 32, 45, 270);
        gc.dispose();

        /* Provide different resolutions for icons to get
         * high quality rendering wherever the OS needs
         * large icons. For example, the ALT+TAB window
         * on certain systems uses a larger icon.
         */
        Shell shell = new Shell(display);
        shell.setText("Small and Large icons");
        shell.setImages(new Image[] { small, large });

        /* No large icon: the OS will scale up the
         * small icon when it needs a large one.
         */
        Shell shell2 = new Shell(display);
        shell2.setText("Small icon");
        shell2.setImage(small);

        shell.open();
        shell2.open();
        while (!shell.isDisposed()) {
            if (!display.readAndDispatch())
                display.sleep();
        }
        small.dispose();
        large.dispose();
        display.dispose();
    }
}