MainClass.java Source code

Introduction

Here is the source code for MainClass.java

Source

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.widgets.Display;
import org.eclipse.swt.widgets.Shell;

public class MainClass {
    public static void main(String[] args) {

        Display display = new Display();
        final Shell shell = new Shell(display);

        final Image image = new Image(display, new MainClass().getClass().getResourceAsStream("swt.png"));
        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) {
                event.gc.drawImage(image, 0, 0);
                Rectangle rect = shell.getClientArea();
                ImageData data = image.getImageData();

                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;

                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();
    }
}