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<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'>Probably you are using a
multi-thread .NET approach, in this case you can simply solve the problem
adding a<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal style='text-indent:35.4pt'><font size=2 color=navy
face=Arial><span lang=EN-GB style='font-size:10.0pt;font-family:Arial;
color:navy'>wglMakeCurrent(NULL, NULL);<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'>after every occurrence of
<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal style='text-indent:35.4pt'><font size=2 color=navy
face=Arial><span lang=EN-GB style='font-size:10.0pt;font-family:Arial;
color:navy'>renWin->Render();<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'>Using this “trick”
a thread release its rendering context (the render window contains a single
rendering context as an instance member) when it finishes rendering so that the
next thread can take it.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'>Let me know<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'>Valeria<o:p></o:p></span></font></p>
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<p class=MsoNormal><b><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma;font-weight:bold'>Da:</span></font></b><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'>
vtk-developers-bounces+g_luigi=fastwebnet.it@vtk.org
[mailto:vtk-developers-bounces+g_luigi=fastwebnet.it@vtk.org] <b><span
style='font-weight:bold'>Per conto di </span></b>A. Minutolo<br>
<b><span style='font-weight:bold'>Inviato:</span></b> marted́ 17 luglio 2007
17.09<br>
<b><span style='font-weight:bold'>A:</span></b> vtk-developers@vtk.org<br>
<b><span style='font-weight:bold'>Oggetto:</span></b> [vtk-developers]
vtkUserEvents from wxWidgetsCustomEvents</span></font><o:p></o:p></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<div id="mb_0">
<p style='margin-bottom:12.0pt'><font size=3 color=black face="Times New Roman"><span
lang=EN-GB style='font-size:12.0pt;color:black'>Hi,<br>
till now I've successfully integrated wxWindows and VTK in my own application
by using the wxVTKRenderWindowInteractor class.</span><o:p></o:p></font></p>
<p style='margin-bottom:12.0pt'><font size=3 color=black face="Times New Roman"><span
lang=EN-GB style='font-size:12.0pt;color:black'>I have developed a driver for a
new interaction device and</span><span lang=EN-GB> </span></font><font
color=black><span lang=EN-GB style='color:black'>a wxWidgetsCustomEvent class
that handles the events it generates, now I want to invoke some vtkUserEvents
by using the Callback functions associated to my wxWidgetsCustomEvent. <br>
I' ve added the observers and the callback functions of my vtkUserEvents
in vtkInteractorStyle and I've developed a subclass of vtkinteractorStyle
with the necessary functionalities.</span><o:p></o:p></font></p>
<p style='margin-bottom:12.0pt'><font size=3 color=black face="Times New Roman"><span
lang=EN-GB style='font-size:12.0pt;color:black'>If i invoke my vtkEvents from a
function associated to a standard wxEvent it works fine. The problem is that if
I invoke the vtkEvents from a function associated to a custom wxEvent, VTK
seems to lose the focus and if I invoke a grabfocus or a dolly, the application
crashes by an error in "vtkWin32OpenGLRenderWindow::MakeCurrent()". </span><o:p></o:p></font></p>
<p style='margin-bottom:12.0pt'><font size=3 color=black face="Times New Roman"><span
lang=EN-GB style='font-size:12.0pt;color:black'>After my vtkEvent is invoked
the first time, is invoked a vtkCommand::LeaveEvent like the mouse pointer
leaves the vtkwindow, how could i avoid this invocation and such situation?</span><o:p></o:p></font></p>
<p style='margin-bottom:12.0pt'><font size=3 color=black face="Times New Roman"><span
lang=EN-GB style='font-size:12.0pt;color:black'>Can i invoke vtkEvent from a
wxCustomEvent without provoking render or focus problems? <br>
I hope someone can explain me the steps needed in order to create
vtkCustomEvents that can answer to my wxCustomEvents like to standard wxEvents?</span><o:p></o:p></font></p>
<p style='margin-bottom:12.0pt'><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt;color:black'>Thanks to everybody.<o:p></o:p></span></font></p>
<p style='margin-bottom:12.0pt'><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt;color:black'>Aniello<o:p></o:p></span></font></p>
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