Interface | Description |
---|---|
EventAcceptor |
An event acceptor is a canvas component object that is prepared to accept
an AWT event, and then possibly process and consume it.
|
LayerListener |
The interface for listeners that respond to mouse clicks and
drags.
|
LayerMotionListener |
The interface for listeners that respond to motion of the mouse over a
figure.
|
Class | Description |
---|---|
EventLayer |
An event layer is a canvas layer that accepts mouse events.
|
LayerAdapter |
An adapter for layer listeners.
|
LayerConsumer |
An adapter for layer listeners that consumes events.
|
LayerEvent |
The class representing mouse events in layers.
|
LayerEventMulticaster |
A subclass of the AWT event multi-caster, which adds support
for layer events.
|
LayerMotionAdapter |
An adapter for layer motion listeners.
|
LayerMouseAdapter |
An object which wraps a mouse listener and
makes it compatible with the Diva canvas,
sending it mouse events in the local coordinate
system.
|
MouseFilter |
A class that accepts mouse events.
|
Corresponding to the layer event class are two new listener classes, LayerListener and LayerMotionListener. The former handles mouse press, drag, and release events, and the latter mouse enter, motion, and leave events. This separation avoid needless inefficiency in interactive canvases. Events can be received from Figure objects, and from the special-purpose EventLayer, which dispatches any events it received to its listeners.
An additional class, EventDispatcher is used to dispatch events to attached listeners. This class is used by the top-level package to group figures into common event-handling classes.
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