<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"><head><meta http-equiv=Content-Type content="text/html; charset=us-ascii"><meta name=Generator content="Microsoft Word 12 (filtered medium)"><style><!--/* Font Definitions */@font-face {font-family:Calibri; panose-1:2 15 5 2 2 2 4 3 2 4;}@font-face {font-family:"Malgun Gothic"; panose-1:0 0 0 0 0 0 0 0 0 0;}@font-face {font-family:Tahoma; panose-1:2 11 6 4 3 5 4 4 2 4;}@font-face {font-family:"\@Malgun Gothic";}/* Style Definitions */p.MsoNormal, li.MsoNormal, div.MsoNormal {margin:0in; margin-bottom:.0001pt; font-size:11.0pt; font-family:"Calibri","sans-serif";}a:link, span.MsoHyperlink {mso-style-priority:99; color:blue; text-decoration:underline;}a:visited, span.MsoHyperlinkFollowed {mso-style-priority:99; color:purple; text-decoration:underline;}span.EmailStyle17 {mso-style-type:personal; font-family:"Calibri","sans-serif"; color:windowtext;}span.EmailStyle18 {mso-style-type:personal-reply; font-family:"Calibri","sans-serif"; color:#1F497D;}.MsoChpDefault {mso-style-type:export-only; font-size:10.0pt;}@page WordSection1 {size:8.5in 11.0in; margin:1.0in 1.25in 1.0in 1.25in;}div.WordSection1 {page:WordSection1;}--></style><!--[if gte mso 9]><xml><o:shapedefaults v:ext="edit" spidmax="1026" /></xml><![endif]--><!--[if gte mso 9]><xml><o:shapelayout v:ext="edit"><o:idmap v:ext="edit" data="1" /></o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple>If you are using Qt, the event loop should be handled by Qt, not VTK with the iren->start.<br>Also be sure to use the QVTKInteractor instead of the type from the factory method vtkRenderWindowInteractor::New.<br><br>Clint<br><br><div id="htc_header" style="">----- Reply message -----<br>From: "Xiaopeng Yang" <yxp233@postech.ac.kr><br>Date: Fri, Jun 24, 2011 6:42 pm<br>Subject: [vtkusers] QT, VTK, and ITK combined program exit problem<br>To: "'vtk'" <vtkusers@vtk.org>, <insight-users@itk.org><br><br></div><div class=WordSection1><p class=MsoNormal><span style='color:#1F497D'>Hi All,<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>I found where the problem is: “iren->Start()”. “iren” is the vtkRenderWindowInteractor I defined in my program. If I delete this sentence “iren->Start()”, then I can close both GUI and console windows without warning message “QObject::killTimers: timers cannot be stopped from another thread”. Otherwise, the problem I described in the previous Email will occur. <o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>However, for seed point selection, I need “iren->Start()”. Then what should I do to solve the problem?<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>Best,<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>Xiaopeng<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> vtkusers-bounces@vtk.org [mailto:vtkusers-bounces@vtk.org] <b>On Behalf Of </b>Xiaopeng Yang<br><b>Sent:</b> Friday, June 24, 2011 4:07 PM<br><b>To:</b> 'vtk'; insight-users@itk.org<br><b>Subject:</b> [vtkusers] QT, VTK, and ITK combined program exit problem<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Dear Users,<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I made a program based on QT, VTK, and ITK. When I run the program, there are GUI window and console window. When I click “exit” button in the GUI window, the GUI window exits but the console window doesn’t. When I click “exit” button in the console window, there is a message: QObject::killTimers: timers cannot be stopped from another thread. If someone already had a similar experience, please could you share your knowledge?<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Thank you very much.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Best regards,<o:p></o:p></p><p