- java.lang.Object
- java.awt.event.ComponentAdapter
- 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
Fields Modifier and Type Field Description protected JScrollBar
scrollBar
ScrollBar that is being adjusted.protected Timer
timer
Timer used when inside a scrollpane and the scrollbar is adjusting.
Constructor Summary
Constructors Constructor Description ComponentHandler()
Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description void
actionPerformed(ActionEvent ae)
Public as a result of Timer.protected JScrollPane
getScrollPane()
Returns theJScrollPane
housing theJTree
, 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 declared in class java.awt.event.ComponentAdapter
componentHidden, componentMoved, componentResized, componentShown
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.
Method Detail
startTimer
protected void startTimer()
Creates, if necessary, and starts a Timer to check if need to resize the bounds.
getScrollPane
protected JScrollPane getScrollPane()
Returns theJScrollPane
housing theJTree
, or null if one isn't found.- Returns:
- the
JScrollPane
housing theJTree
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 interfaceActionListener
- Parameters:
ae
- the event to be processed