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<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'>Hi All,</span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'> </span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'>I thought it would be nice to show a different cursor
when rotating the camera using vtkInteractorStyleTrackballCamera – LBDown+MouseMove.
This works fine until the cursor is moved over vtkScalarBarWidget.</span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'> </span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'>vtkScalarBarWidget::OnMouseMove() changes the cursor,
and specifically, on leaving the scalar bar, calls SetCurrentCursor(VTK_CURSOR_DEFAULT)
removing the custom rotation cursor.</span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'> </span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'>vtkScalarBarWidget could be changed to restore the
original ‘outside’ cursor but this is only a partial cure. I am assuming
that since vtkScalarBarWidget has a priority of 0.55, it always gets the LBDown/MouseMove
events before the render window interactor. If the scalar bar was hit on LBDown
it can do the correct MouseMove stuff and then set the abort flag to prevent
the interactor receiving the mouse move notification. However, if LBDown did
not hit the scalar bar, it would be preferable if the widget ignored mouse move
events.</span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'> </span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'>A possible solution is for vtkScalarBarWidget to
ignore mouse move events if a LBDown did not hit the scalar bar. Can anybody foresee
any side effects? Similar treatment may also be required for vtkXYPlotWidget.</span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'> </span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'>John.</span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'> </span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'> </span></font></p>
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