Candera 2D Listener
Applications can receive notifications on scene graph events. Therefore implement a listener, which defines hooks to receive those notifications.
Following listener interfaces are provided in Candera 2D:
- Candera::Camera2DListener defines hooks that are called before or after a Camera2D is rendered. In order to register a Camera2DListener to a Camera2D simply derive from Camera2DListener and override pure virtual functions with custom code.
- Candera::Renderer2DListener defines hooks that are called before or after a node is rendered. It supports events for OnNodePreRender and OnNodePostRender, so you are informed before and after a node is rendered.
Example Listener Implementation
Refer to Using Animation Callback Functions for an example how to implement and use an Animation listener.