public AnimationPanel() {
		// remove these lines
		// Insets insets = getInsets();
		// int marginWidth = getWidth() - insets.left - insets.right;
		// int marginHeight = getHeight() - insets.top - insets.bottom;
		// s = new MovingRectangle(10, 10, currentWidth, currentHeight, marginWidth, marginHeight, currentPath);
		//
		popup = new JPopupMenu(); //create the popup menu
		makePopupMenu();

		// add the mouse event to handle popup menu and create new shape
		addMouseListener( new MouseAdapter() {
			public void mousePressed(MouseEvent e) {
				maybeShowPopup(e);
			}

			public void mouseReleased(MouseEvent e) {
				maybeShowPopup(e);
			}

			private void maybeShowPopup(MouseEvent e) {
				if (e.isPopupTrigger()) {
					popup.show(e.getComponent(), e.getX(), e.getY());
				}
			}
			public void mouseClicked( MouseEvent e ) {
				if (animationThread != null) {	// if the animation has started, then
					boolean found = false;
					for (MovingShape sh : s) {
						if ( sh.contains( e.getPoint()) ) { // if the mousepoint is within a shape, then set the shape to be selected/deselected
							found = true;
							sh.setSelected( ! sh.isSelected() );
					}
					}
					if (! found) createNewShape(e.getX(), e.getY()); // if the mousepoint is not within a shape, then create a new one according to the mouse position
				}
			}
		});
	}