Add Controls to Canvas : Canvas « SWT « Java Tutorial

1. Java Tutorial
2. SWT
3. Canvas

import org.eclipse.swt.SWT;
import org.eclipse.swt.events.PaintEvent;
import org.eclipse.swt.events.PaintListener;
import org.eclipse.swt.graphics.Rectangle;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Canvas;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;

public class CanvasControlAdd {
  public static void main(String[] args) {
    Display display = new Display();
    Shell shell = new Shell(display);
    shell.setText("Canvas Example");
    shell.setLayout(new FillLayout());

    Canvas canvas = new Canvas(shell, SWT.NONE);

    Button button = new Button(canvas, SWT.PUSH);
    button.setBounds(10, 10, 300, 40);
    button.setText("You can place widgets on a canvas");

    canvas.addPaintListener(new PaintListener() {
      public void paintControl(PaintEvent e) {
        Rectangle rect = ((Canvas) e.widget).getBounds();
        e.gc.setForeground(e.display.getSystemColor(SWT.COLOR_RED));
        e.gc.drawFocus(5, 5, rect.width - 10, rect.height - 10);
        e.gc.drawText("You can draw text directly on a canvas", 60, 60);
      }
    });

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

17.20.Canvas
	17.20.1.	Repaint Canvas
	17.20.2.	Canvas: scroll an image (flicker free, no double buffering)
	17.20.3.	Add Traverse event to Canvas
	17.20.4.	Add Controls to Canvas
	17.20.5.	Add KeyEvent to Canvas