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).
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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()
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Method Summary
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
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Field Details
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timer
Timer used when inside a scrollpane and the scrollbar is adjusting. -
scrollBar
ScrollBar that is being adjusted.
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Constructor Details
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ComponentHandler
public ComponentHandler()
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Method Details
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startTimer
protected void startTimer()Creates, if necessary, and starts a Timer to check if need to resize the bounds. -
getScrollPane
Returns theJScrollPane
housing theJTree
, or null if one isn't found.- Returns:
- the
JScrollPane
housing theJTree
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actionPerformed
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
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