Interface ComponentListener
- All Superinterfaces:
EventListener
- All Known Implementing Classes:
-
AWTEventMulticaster
,BasicInternalFrameUI.ComponentHandler
,BasicSliderUI.ComponentHandler
,BasicTreeUI.ComponentHandler
,Component.AccessibleAWTComponent.AccessibleAWTComponentHandler
,ComponentAdapter
,JViewport.ViewListener
public interface ComponentListener extends EventListener
The listener interface for receiving component events. The class that is interested in processing a component event either implements this interface (and all the methods it contains) or extends the abstract ComponentAdapter
class (overriding only the methods of interest). The listener object created from that class is then registered with a component using the component's addComponentListener
method. When the component's size, location, or visibility changes, the relevant method in the listener object is invoked, and the ComponentEvent
is passed to it.
Component events are provided for notification purposes ONLY; The AWT will automatically handle component moves and resizes internally so that GUI layout works properly regardless of whether a program registers a ComponentListener
or not.
- Since:
- 1.1
- See Also:
-
ComponentAdapter
,ComponentEvent
, Tutorial: Writing a Component Listener
Method Summary
Modifier and Type | Method | Description |
---|---|---|
void | componentHidden(ComponentEvent e) | Invoked when the component has been made invisible. |
void | componentMoved(ComponentEvent e) | Invoked when the component's position changes. |
void | componentResized(ComponentEvent e) | Invoked when the component's size changes. |
void | componentShown(ComponentEvent e) | Invoked when the component has been made visible. |
Method Detail
componentResized
void componentResized(ComponentEvent e)
Invoked when the component's size changes.
- Parameters:
-
e
- the event to be processed
componentMoved
void componentMoved(ComponentEvent e)
Invoked when the component's position changes.
- Parameters:
-
e
- the event to be processed
componentShown
void componentShown(ComponentEvent e)
Invoked when the component has been made visible.
- Parameters:
-
e
- the event to be processed
componentHidden
void componentHidden(ComponentEvent e)
Invoked when the component has been made invisible.
- Parameters:
-
e
- the event to be processed