Creates an instance of BasicSplitPaneDivider. Creates and return an instance of JButton that can be used to collapse the left component in the split pane. Messaged when the oneTouchExpandable value of the JSplitPane the receiver is contained in changes. Paints the divider. Sets the SplitPaneUI that is using the receiver.
Handles mouse dragging message to do the actual dragging.
MouseHandler mouseHandler Handle of mouse events. Creates an instance of BasicSplitPaneDivider. Registers this instance for mouse events and mouse dragged events. Sets the SplitPaneUI that is using the receiver. Sets the size of the divider to newSize .