All Implemented Interfaces:: ActionListener, ComponentListener, EventListener

public class BasicTreeUI.ComponentHandlerextends ComponentAdapter implements ActionListener

Updates the preferred size when scrolling (if necessary).

protected Timer timer

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

protected JScrollBar scrollBar

ScrollBar that is being adjusted.

public void componentMoved (ComponentEvent e)

Description copied from class: ComponentAdapter

Invoked when the component's position changes.

protected void startTimer()

Creates, if necessary, and starts a Timer to check if need to resize the bounds.

protected JScrollPane getScrollPane()

Returns the JScrollPane housing the JTree, or null if one isn't found.

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.