/** Creates a new panel */
public GraphPanel() {
setLayout(null);
canvas = createCanvas();
canvas.setLayout(null);
canvas.setBackground(Color.WHITE);
canvas.setOpaque(true);
canvas.setFocusable(true);
overlay = createOverlay();
overlay.setOpaque(false);
overlay.setFocusable(false);
add(overlay);
add(canvas);
graphListener = graphListener();
capabilityController = new CapabilityController(this);
capabilityController.register(CapabilityName.MOVEABLE, new MoveableCapabilityHandler());
capabilityController.register(CapabilityName.SELECTABLE, new SelectableCapabilityHandler());
capabilityController.register(CapabilityName.CONTEXT_MENU, new ContextCapabilityHandler());
addComponentListener(
new ComponentAdapter() {
@Override
public void componentResized(ComponentEvent e) {
regraph();
}
public void componentShown(ComponentEvent e) {
regraph();
}
});
}
/**
* Adds a new capability to this graph.
*
* @param name the name of the capability
* @param handler the new handler, may be <code>null</code> to remove an existing handler
*/
public <T> void setCapability(CapabilityName<T> name, CapabilityHandler<T> handler) {
capabilityController.register(name, handler);
}
