org.eclipse.swt.snippets.Snippet95.java Source code

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Here is the source code for org.eclipse.swt.snippets.Snippet95.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: capture a widget image 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.graphics.*;
import org.eclipse.swt.widgets.*;

public class Snippet95 {

    public static void main(String[] args) {
        final Display display = new Display();
        final Shell shell = new Shell(display);
        shell.setText("Widget");

        final Table table = new Table(shell, SWT.MULTI);
        table.setLinesVisible(true);
        table.setBounds(10, 10, 100, 100);
        for (int i = 0; i < 9; i++) {
            new TableItem(table, SWT.NONE).setText("item" + i);
        }

        Button button = new Button(shell, SWT.PUSH);
        button.setText("Capture");
        button.pack();
        button.setLocation(10, 140);
        button.addListener(SWT.Selection, event -> {
            Point tableSize = table.getSize();
            GC gc = new GC(table);
            final Image image = new Image(display, tableSize.x, tableSize.y);
            gc.copyArea(image, 0, 0);
            gc.dispose();

            Shell popup = new Shell(shell);
            popup.setText("Image");
            popup.addListener(SWT.Close, e -> image.dispose());

            Canvas canvas = new Canvas(popup, SWT.NONE);
            canvas.setBounds(10, 10, tableSize.x + 10, tableSize.y + 10);
            canvas.addPaintListener(e -> e.gc.drawImage(image, 0, 0));
            popup.pack();
            popup.open();
        });
        shell.pack();
        shell.open();
        while (!shell.isDisposed()) {
            if (!display.readAndDispatch())
                display.sleep();
        }
        display.dispose();
    }
}