public void setShape(Shape shape) {
this.shape = shape;
shape.setLineColor(new Color(Display.getCurrent(), new RGB(30, 144, 255)));
shape.setFillColor(new Color(Display.getCurrent(), new RGB(230, 230, 250)));
}
private void paint(GC gc) {
gc.setAntialias(SWT.ON);
setBackground(Display.getCurrent().getSystemColor(SWT.COLOR_WHITE));
gc.fillRectangle(0, 0, getSize().x, getSize().y);
shape.paint(gc);
}