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<p class="MsoNormal">Hi all,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"> I’m not sure what’s going on. I have a class called VTKRenderingArea that is sub-classed from QVTKWidget. On my QT window, I have placed a QWidget to put the VTK window at a specific location and made sure that it was
promoted to VTKRenderingArea. Everything compiles and links fine. <o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"> When I run my application, I run into a crash in QVTKWidget.cxx:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:"Courier New""> <span style="color:blue">if</span> (!<span style="color:blue">this</span>-><span style="color:#010001">mRenWin</span>)<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:"Courier New""> {<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:"Courier New"">
<span style="color:green">// create a default vtk window<o:p></o:p></span></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:"Courier New"">
<span style="color:#010001">vtkRenderWindow</span>* <span style="color:#010001">win</span> =
<span style="color:#010001">vtkRenderWindow</span>::<span style="color:#010001">New</span>();<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:"Courier New"">
<span style="color:blue">this</span>-><span style="color:#010001">SetRenderWindow</span>(<span style="color:#010001">win</span>);<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:"Courier New"">
<span style="color:#010001">win</span>-><span style="color:#010001">Delete</span>();<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:"Courier New""> }<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:"Courier New""><o:p> </o:p></span></p>
<p class="MsoNormal"> When debugging the code, I see that the *win is null and, hence, the crash. Is there something that I need to do to instantiate the vtkrenderwindow? The VTKRenderingArea is a valid pointer but I have noticed that the QVTKPaintEngine
is an uninitialized pointer.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Doug<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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