[vtkusers] Java - Enable Mouseover for vtkScalarBarWidget

[Christopher Navarro]

When adding a vtkScalarBarWidget to a vtkCanvas object, the mouse-over of 
the widget does not change the cursor to (for instance) resize arrows.  I 
can move and resize the widget if I guess the right area to click and drag, 
but it would be very helpful if the cursor would change to show what 
operation is available.  I can see in the c++ code that the code exists for 
this so I must not initializing the widget with something to call those 
functions when mouse events happen.  I'm using VTK 4.4 with Java 1.4.  Any 
ideas what I might not be doing?

Chris