Demonstrates how to draw images
//Send questions, comments, bug reports, etc. to the authors:
//Rob Warner (rwarner@interspatial.com)
//Robert Harris (rbrt_harris@yahoo.com)
import org.eclipse.swt.events.*;
import org.eclipse.swt.graphics.*;
import org.eclipse.swt.widgets.*;
/**
* This class demonstrates how to draw images
*/
public class DrawImagesDemo {
public void run() {
Display display = new Display();
final Shell shell = new Shell(display);
// Load an image
final Image image = new Image(display, this.getClass().getResourceAsStream(
"java2s.gif"));
System.out.println(image.getImageData().scanlinePad);
image.getImageData().scanlinePad = 40;
System.out.println(image.getImageData().scanlinePad);
shell.addPaintListener(new PaintListener() {
public void paintControl(PaintEvent event) {
// Draw the untainted image
event.gc.drawImage(image, 0, 0);
// Determine how big the drawing area is
Rectangle rect = shell.getClientArea();
// Get information about the image
ImageData data = image.getImageData();
// Calculate drawing values
int srcX = data.width / 4;
int srcY = data.height / 4;
int srcWidth = data.width / 2;
int srcHeight = data.height / 2;
int destWidth = 2 * srcWidth;
int destHeight = 2 * srcHeight;
// Draw the image
event.gc.drawImage(image, srcX, srcY, srcWidth, srcHeight, rect.width
- destWidth, rect.height - destHeight, destWidth, destHeight);
}
});
shell.setText("Draw Images");
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch()) {
display.sleep();
}
}
image.dispose();
display.dispose();
}
/**
* The application entry point
*
* @param args the command line arguments
*/
public static void main(String[] args) {
new DrawImagesDemo().run();
}
}
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