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<p class=MsoNormal>I have a vtkPolyData mesh with scalar data and a
vtkBandedPolyDataContourFilter. I am trying to use pickers to get the
scalar data at a point. It works with a vtkCanvas, but <b>not with a
vtkPanel</b>. Here is the code I use in the addWindowSetObserver method
to make the picker work. I want it to work with a vtkPointPicker and with
a vtkPanel. The problem is that vtkPanels do not have a getIren() method
like the vtkCanvas.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><span style='font-family:"Courier New"'> //
Delay creation and setup of picker till the VTK window is ready<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Courier New"'>
renWin.addWindowSetObserver(new Observer() {<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Courier New"'>
public void update(Observable o, Object arg) {<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Courier New"'>
// Create a cell picker.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Courier New"'>
picker = new vtkCellPicker();<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Courier New"'>
// Now at the end of the pick event call the above function.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Courier New"'>
picker.AddObserver("EndPickEvent", AnnotatePick.this,
"annotatePick");<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Courier New"'>
renWin.getIren().SetPicker(picker);<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Courier New"'>
// Initially pick the cell at this location.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Courier New"'>
picker.Pick(85, 126, 0, renWin.GetRenderer());<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Courier New"'>
}<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Courier New"'>
});<o:p></o:p></span></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>I tried creating a vtkRenderWindowInteractor and setting the
render window to renWin.GetRenderWindow(). However, the picker doesn’t
work when I do this; it only works with the vtkCanvas. Is there any way
you can implement pickers with the vtkPanel, or can it only be done with a
vtkCanvas?<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Thanks in advance!<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><b><i><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";
color:#00337F'>Bill Lucarell</span></i></b><span style='font-size:12.0pt;
font-family:"Times New Roman","serif";color:navy'><o:p></o:p></span></p>
<p class=MsoNormal><o:p> </o:p></p>
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