Java Tutorial/SWT/Screen Capture

17. Capture a widget image with a GC

   <source lang="java">

/*******************************************************************************

* 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();
 }

}</source>

17. Full Screen Capture

   <source lang="java">

/*******************************************************************************

* 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();
 }

}</source>

17. Screenshot(screen capture) by GC

   <source lang="java">

/*******************************************************************************

* 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();
 }

}</source>