import org.eclipse.swt.SWT;
import org.eclipse.swt.events.PaintEvent;
import org.eclipse.swt.events.PaintListener;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.graphics.ImageData;
import org.eclipse.swt.graphics.Rectangle;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Canvas;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
public class ImagePartDraw {
public static void main(String[] args) {
final Display display = new Display();
final Shell shell = new Shell(display);
shell.setText("Canvas Example");
shell.setLayout(new FillLayout());
Canvas canvas = new Canvas(shell, SWT.NONE);
canvas.addPaintListener(new PaintListener() {
public void paintControl(PaintEvent e) {
Image image = new Image(display, "yourFile.gif");
System.out.println(image.getImageData().scanlinePad);
image.getImageData().scanlinePad = 40;
System.out.println(image.getImageData().scanlinePad);
e.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
e.gc.drawImage(image, srcX, srcY, srcWidth, srcHeight, rect.width - destWidth, rect.height
- destHeight, destWidth, destHeight);
}
});
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch()) {
display.sleep();
}
}
display.dispose();
}
}