Appendix D DoodlePad Shape Events
The Shape class implements a series of "on" methods: one for each mouse event. For example, Shape implements a method named onMousePressed which is invoked when a Shape is pressed by the mouse. This method as well as all other methods that correspond with mouse events share a common signature with the types: double, double and int. These are the mouse event x and y coordinates and an integer identifying the mouse button in use. These parameters are identical to the signature of methods used in the method reference approach, minus the first parameter identifying the Shape object.
The following table lists all methods that may be overridden in order to handle a triggered mouse event.
| Method | Description |
|---|---|
| public void onMouseClicked(double x, double y, int button) 1 | Override to handle a mouse-click event |
| public void onMouseDoubleClicked(double x, double y, int button) 2 | Override to handle a mouse-double-click event. |
| public void onMousePressed(double x, double y, int button) 3 | Override to handle a mouse-pressed event - when a mouse button is depressed. |
| public void onMouseReleased(double x, double y, int button) 4 | Override to handle a mouse-released event - when a mouse button is released after being depressed. |
| public void onMouseMoved(double x, double y, int button) 5 | Override to handle a mouse-moved event. This occurs when the mouse is moved over a Shape while no buttons are depressed. |
| public void onMouseDragged(double x, double y, int button) 6 | Override to handle a mouse-dragged event. This occurs when the mouse is moved over a Shape while simultaneously holding a mouse button down. |
| public void onMouseEntered(double x, double y, int button) 7 | Override to handle a mouse-entered event. This occurs when the mouse moves over a Shape from another Shape or the Pad. |
| public void onMouseExited(double x, double y, int button) 8 | Override to handle a mouse-exited event. This occurs when the mouse moves off a Shape on to another Shape or the Pad. |
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