Class BasicTreeUI.ComponentHandler

• 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).

Fields

timer

protected Timer timer

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

scrollBar

protected JScrollBar scrollBar

ScrollBar that is being adjusted.

Constructors

ComponentHandler

public ComponentHandler()

Methods

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