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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 have recently used this widget to display info about
different curves on an XY plot. Here are some of the issues I encountered.</span></font></p>
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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'>1. The virtual overrides void StartWidgetInteraction(double
e[2]) and void EndWidgetInteraction(double e[2]) in vtkBalloonRepresentation are
not called because the argument specifications are slightly different ( double*
) v ( double* const ). I have reported this as bug for vtkBorderRepresentation
under VC6.</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'>2. If you move the actors using the keyboard the balloon
is shown pointing to an actor which is now in a different position. In my
particular case ‘r’ redraws the graphs to the original scale after
zooming. Therefore mapping key press ‘r’ to vtkHoverWidget::MoveAction
should solve the problem. Of course, it would be very nice if the interactor
could ‘tell’ the widget that props have moved.</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'>3. Actors are still picked when the mouse is servicing
another widget. The particular case here is a vtkBorderWidget used to move a legend
actor. When the mouse is hovering over the border widget, which in turn is
placed over the curves, the cursor shape is changed to match the border widget but
the balloon also appears. I don’t know what the intended behaviour is.</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=3 face="Times New Roman"><span lang=EN-GB
style='font-size:12.0pt'> </span></font></p>
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