org.eclipse.swt.snippets.Snippet119.java Source code

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Here is the source code for org.eclipse.swt.snippets.Snippet119.java

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/*******************************************************************************
 * Copyright (c) 2000, 2016 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;

/*
 * Cursor example snippet: create a color cursor from a source and a mask
 *
 * 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 Snippet119 {

    static byte[] srcData = { (byte) 0x11, (byte) 0x11, (byte) 0x11, (byte) 0x00, (byte) 0x00, (byte) 0x11,
            (byte) 0x11, (byte) 0x11, (byte) 0x11, (byte) 0x10, (byte) 0x00, (byte) 0x01, (byte) 0x10, (byte) 0x00,
            (byte) 0x01, (byte) 0x11, (byte) 0x11, (byte) 0x00, (byte) 0x22, (byte) 0x01, (byte) 0x10, (byte) 0x33,
            (byte) 0x00, (byte) 0x11, (byte) 0x10, (byte) 0x02, (byte) 0x22, (byte) 0x01, (byte) 0x10, (byte) 0x33,
            (byte) 0x30, (byte) 0x01, (byte) 0x10, (byte) 0x22, (byte) 0x22, (byte) 0x01, (byte) 0x10, (byte) 0x33,
            (byte) 0x33, (byte) 0x01, (byte) 0x10, (byte) 0x22, (byte) 0x22, (byte) 0x01, (byte) 0x10, (byte) 0x33,
            (byte) 0x33, (byte) 0x01, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00,
            (byte) 0x00, (byte) 0x00, (byte) 0x01, (byte) 0x11, (byte) 0x11, (byte) 0x01, (byte) 0x10, (byte) 0x11,
            (byte) 0x11, (byte) 0x10, (byte) 0x01, (byte) 0x11, (byte) 0x11, (byte) 0x01, (byte) 0x10, (byte) 0x11,
            (byte) 0x11, (byte) 0x10, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00,
            (byte) 0x00, (byte) 0x00, (byte) 0x10, (byte) 0x44, (byte) 0x44, (byte) 0x01, (byte) 0x10, (byte) 0x55,
            (byte) 0x55, (byte) 0x01, (byte) 0x10, (byte) 0x44, (byte) 0x44, (byte) 0x01, (byte) 0x10, (byte) 0x55,
            (byte) 0x55, (byte) 0x01, (byte) 0x10, (byte) 0x04, (byte) 0x44, (byte) 0x01, (byte) 0x10, (byte) 0x55,
            (byte) 0x50, (byte) 0x01, (byte) 0x11, (byte) 0x00, (byte) 0x44, (byte) 0x01, (byte) 0x10, (byte) 0x55,
            (byte) 0x00, (byte) 0x11, (byte) 0x11, (byte) 0x10, (byte) 0x00, (byte) 0x01, (byte) 0x10, (byte) 0x00,
            (byte) 0x01, (byte) 0x11, (byte) 0x11, (byte) 0x11, (byte) 0x11, (byte) 0x00, (byte) 0x00, (byte) 0x11,
            (byte) 0x11, (byte) 0x11, };

    static byte[] mskData = { (byte) 0x03, (byte) 0xc0, (byte) 0x1f, (byte) 0xf8, (byte) 0x3f, (byte) 0xfc,
            (byte) 0x7f, (byte) 0xfe, (byte) 0x7f, (byte) 0xfe, (byte) 0x7f, (byte) 0xfe, (byte) 0xff, (byte) 0xff,
            (byte) 0xfe, (byte) 0x7f, (byte) 0xfe, (byte) 0x7f, (byte) 0xff, (byte) 0xff, (byte) 0x7f, (byte) 0xfe,
            (byte) 0x7f, (byte) 0xfe, (byte) 0x7f, (byte) 0xfe, (byte) 0x3f, (byte) 0xfc, (byte) 0x1f, (byte) 0xf8,
            (byte) 0x03, (byte) 0xc0 };

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

        //Create a source ImageData of depth 4
        PaletteData palette = new PaletteData(black.getRGB(), white.getRGB(), yellow.getRGB(), red.getRGB(),
                blue.getRGB(), green.getRGB());
        ImageData sourceData = new ImageData(16, 16, 4, palette, 1, srcData);

        //Create a mask ImageData of depth 1 (monochrome)
        palette = new PaletteData(black.getRGB(), white.getRGB());
        ImageData maskData = new ImageData(16, 16, 1, palette, 1, mskData);

        //Set mask
        sourceData.maskData = maskData.data;
        sourceData.maskPad = maskData.scanlinePad;

        //Create cursor
        Cursor cursor = new Cursor(display, sourceData, 10, 10);

        //Remove mask to draw them separately just to show what they look like
        sourceData.maskData = null;
        sourceData.maskPad = -1;

        Shell shell = new Shell(display);
        shell.setText("Snippet 119");
        final Image source = new Image(display, sourceData);
        final Image mask = new Image(display, maskData);
        shell.addPaintListener(e -> {
            GC gc = e.gc;
            int x = 10, y = 10;
            String stringSource = "source: ";
            String stringMask = "mask: ";
            gc.drawString(stringSource, x, y);
            gc.drawString(stringMask, x, y + 30);
            x += Math.max(gc.stringExtent(stringSource).x, gc.stringExtent(stringMask).x);
            gc.drawImage(source, x, y);
            gc.drawImage(mask, x, y + 30);
        });
        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();
    }
}