Java Tutorial/SWT/Screen Capture

17. Capture a widget image with a GC

/*******************************************************************************
 * Copyright (c) 2000, 2004 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * 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.SWT;
import org.eclipse.swt.events.PaintEvent;
import org.eclipse.swt.events.PaintListener;
import org.eclipse.swt.graphics.GC;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Canvas;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Listener;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Table;
import org.eclipse.swt.widgets.TableItem;
public class CaptureWidgetImageGC {
  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, new Listener() {
      public void handleEvent(Event 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, new Listener() {
          public void handleEvent(Event e) {
            image.dispose();
          }
        });
        Canvas canvas = new Canvas(popup, SWT.NONE);
        canvas.setBounds(10, 10, tableSize.x + 10, tableSize.y + 10);
        canvas.addPaintListener(new PaintListener() {
          public void paintControl(PaintEvent 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();
  }
}

17. Full Screen Capture

/*******************************************************************************
 * Copyright (c) 2000, 2004 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * 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.SWT;
import org.eclipse.swt.custom.ScrolledComposite;
import org.eclipse.swt.events.PaintEvent;
import org.eclipse.swt.events.PaintListener;
import org.eclipse.swt.graphics.GC;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Canvas;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Listener;
import org.eclipse.swt.widgets.Shell;
public class ScreenShotWithGC {
  public static void main(String[] args) {
    final Display display = new Display();
    final Shell shell = new Shell(display);
    shell.setLayout(new FillLayout());
    Button button = new Button(shell, SWT.PUSH);
    button.setText("Capture");
    button.addListener(SWT.Selection, new Listener() {
      public void handleEvent(Event 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, new Listener() {
          public void handleEvent(Event 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(new PaintListener() {
          public void paintControl(PaintEvent e) {
            e.gc.drawImage(image, 0, 0);
          }
        });
        popup.open();
      }
    });
    shell.pack();
    shell.open();
    while (!shell.isDisposed()) {
      if (!display.readAndDispatch())
        display.sleep();
    }
    display.dispose();
  }
}

17. Screenshot(screen capture) by GC

/*******************************************************************************
 * Copyright (c) 2000, 2004 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * 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.SWT;
import org.eclipse.swt.events.PaintEvent;
import org.eclipse.swt.events.PaintListener;
import org.eclipse.swt.graphics.GC;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Canvas;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Listener;
import org.eclipse.swt.widgets.Shell;
public class ScreenshotCaptureGC {
  public static void main(String[] args) {
    final Display display = new Display();
    final Shell shell = new Shell(display);
    Button button = new Button(shell, SWT.PUSH);
    button.setText("Capture");
    button.pack();
    button.setLocation(10, 140);
    button.addListener(SWT.Selection, new Listener() {
      public void handleEvent(Event event) {
        GC gc = new GC(display);
        final Image image = new Image(display, 400,400);
        gc.copyArea(image, 0, 0);
        gc.dispose();
        Shell popup = new Shell(shell);
        popup.setText("Image");
        popup.addListener(SWT.Close, new Listener() {
          public void handleEvent(Event e) {
            image.dispose();
          }
        });
        Canvas canvas = new Canvas(popup, SWT.NONE);
        canvas.setBounds(10, 10, 400 + 10, 400 + 10);
        canvas.addPaintListener(new PaintListener() {
          public void paintControl(PaintEvent 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();
  }
}