Java™ Platform
Standard Ed. 6

javax.swing.plaf.basic
Class BasicTreeUI.ComponentHandler

java.lang.Object
  extended by java.awt.event.ComponentAdapter
      extended by javax.swing.plaf.basic.BasicTreeUI.ComponentHandler
All Implemented Interfaces:
ActionListener, ComponentListener, EventListener
Enclosing class:
BasicTreeUI

public class BasicTreeUI.ComponentHandler
extends ComponentAdapter
implements ActionListener

Updates the preferred size when scrolling (if necessary).


Field Summary
protected  JScrollBar scrollBar
          ScrollBar that is being adjusted.
protected  Timer timer
          Timer used when inside a scrollpane and the scrollbar is adjusting.
 
Constructor Summary
BasicTreeUI.ComponentHandler()
           
 
Method Summary
 void actionPerformed(ActionEvent ae)
          Public as a result of Timer.
 void componentMoved(ComponentEvent e)
          Invoked when the component's position changes.
protected  JScrollPane getScrollPane()
          Returns the JScrollPane housing the JTree, or null if one isn't found.
protected  void startTimer()
          Creates, if necessary, and starts a Timer to check if need to resize the bounds.
 
Methods inherited from class java.awt.event.ComponentAdapter
componentHidden, componentResized, componentShown
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Field Detail

timer

protected Timer timer
Timer used when inside a scrollpane and the scrollbar is adjusting.


scrollBar

protected JScrollBar scrollBar
ScrollBar that is being adjusted.

Constructor Detail

BasicTreeUI.ComponentHandler

public BasicTreeUI.ComponentHandler()
Method Detail

componentMoved

public void componentMoved(ComponentEvent e)
Description copied from class: ComponentAdapter
Invoked when the component's position changes.

Specified by:
componentMoved in interface ComponentListener
Overrides:
componentMoved in class ComponentAdapter

startTimer

protected void startTimer()
Creates, if necessary, and starts a Timer to check if need to resize the bounds.


getScrollPane

protected JScrollPane getScrollPane()
Returns the JScrollPane housing the JTree, or null if one isn't found.


actionPerformed

public void actionPerformed(ActionEvent ae)
Public as a result of Timer. If the scrollBar is null, or not adjusting, this stops the timer and updates the sizing.

Specified by:
actionPerformed in interface ActionListener

Java™ Platform
Standard Ed. 6

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