org.eclipse.swt.snippets.Snippet215.java Source code

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Here is the source code for org.eclipse.swt.snippets.Snippet215.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;

/*
 * GC example snippet: take a screen shot with a GC
 *
 * For a list of all SWT example snippets see
 * http://www.eclipse.org/swt/snippets/
 */
import org.eclipse.swt.*;
import org.eclipse.swt.custom.*;
import org.eclipse.swt.graphics.*;
import org.eclipse.swt.layout.*;
import org.eclipse.swt.widgets.*;

public class Snippet215 {

    public static void main(String[] args) {
        final Display display = new Display();
        final Shell shell = new Shell(display);
        shell.setText("Snippet 215");
        shell.setLayout(new FillLayout());
        Button button = new Button(shell, SWT.PUSH);
        button.setText("Capture");
        button.addListener(SWT.Selection, event -> {

            /* Take the screen shot */
            GC gc = new GC(display);
            final Image image = new Image(display, display.getBounds());
            gc.copyArea(image, 0, 0);
            gc.dispose();

            Shell popup = new Shell(shell, SWT.SHELL_TRIM);
            popup.setLayout(new FillLayout());
            popup.setText("Image");
            popup.setBounds(50, 50, 200, 200);
            popup.addListener(SWT.Close, e -> image.dispose());

            ScrolledComposite sc = new ScrolledComposite(popup, SWT.V_SCROLL | SWT.H_SCROLL);
            Canvas canvas = new Canvas(sc, SWT.NONE);
            sc.setContent(canvas);
            canvas.setBounds(display.getBounds());
            canvas.addPaintListener(e -> e.gc.drawImage(image, 0, 0));
            popup.open();
        });
        shell.pack();
        shell.open();
        while (!shell.isDisposed()) {
            if (!display.readAndDispatch())
                display.sleep();
        }
        display.dispose();
    }
}