SWT: Working with images

SWT provides Image class to draw images. Following step-by-step procedure explains sample application to draw images.

Step 1: Define an image instance and add it to the display.

String imagePath = "C:\\java.png";

Image img = new Image(display, imagePath);

Step 2: Use drawImage method of Graphic context instance.

GC gc = new GC(shell);

gc.drawImage(img, 200, 200);

Step 3: Dispose image and graphic context.

img.dispose();

gc.dispose();

Following is the complete working application.

import org.eclipse.swt.graphics.GC;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;

public class Test {

 private static int shellWidth = 500;
 private static int shellHeight = 500;

 private static String imagePath = "java.png";

 private static void addGraphicsToShell(Display display, Shell shell) {
  Image img = new Image(display, imagePath);
  shell.open();
  GC gc = new GC(shell);
  gc.drawImage(img, 200, 200);
  img.dispose();
  gc.dispose();

 }

 public static void main(String[] args) {

  /* Instantiate Display object, it represents SWT session */
  Display display = new Display();

  /*
   * Define Shell, it represent a window, You can add more than one shell
   * to Display
   */
  Shell shell = new Shell(display);
  shell.setSize(shellWidth, shellHeight);
  shell.setText("SWT Tutorial");

  addGraphicsToShell(display, shell);

  /*
   * Run the event dispatching loop until an exit condition occurs, which
   * is typically when the main shell window is closed by the user.
   */

  while (!shell.isDisposed()) {
   if (!display.readAndDispatch()) {
    display.sleep();
   }
  }

  /* Dispose the display */
  display.dispose();

 }
}

Run above application, you can able to see following window.

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