MainClass.java Source code

Introduction

Here is the source code for MainClass.java

Source

import org.eclipse.swt.SWT;
import org.eclipse.swt.events.PaintEvent;
import org.eclipse.swt.events.PaintListener;
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 MainClass {

    public static void main(String[] a) {

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

        shell.setSize(250, 200);

        shell.setLayout(new FillLayout());

        Canvas drawingCanvas = new Canvas(shell, SWT.NONE);
        drawingCanvas.addPaintListener(new ArcExamplePaintListener());

        shell.open();
        while (!shell.isDisposed()) {
            if (!d.readAndDispatch())
                d.sleep();
        }
        d.dispose();
    }
}

class ArcExamplePaintListener implements PaintListener {
    public void paintControl(PaintEvent e) {
        Canvas canvas = (Canvas) e.widget;
        int x = canvas.getBounds().width;
        int y = canvas.getBounds().height;

        e.gc.setBackground(e.display.getSystemColor(SWT.COLOR_BLACK));

        e.gc.fillArc((x - 200) / 2, (y - 200) / 2, 200, 200, 0, 90);
    }
}