The application freezes during startup when one produces mouse move events when the workbench still initializes the application but the render windows aren't initialized yet (show white color). A mouse move event is passed down to a render window in order to perform a picking. In vtkOpenGLRenderWindow the app freezes in vtkOpenGLRenderWindow::GetZbufferData(...):
// Error checking
// Must clear previous errors first.
while(glGetError() != GL_NO_ERROR)
{
;
}because the opengl context isn't properly setup yet and errors are returned.
Slicer had the same problem [1][2] a long time ago and state that they have fixed it in ctk [3]. They also had the
The right solution IMO would be to add a check in QmitkRenderWindow to only map 2D to 3D position in case the renderer is initialized. Otherwise the event handling doesn't make sense either, right?
A version update of QT might solve the issue but it also is about how and when to use the rendering environment. I have asked a qhile ago in the users list if anybody else has these problems and got no answer. Here all my colleagues are blocked by this! They have to restart the application and wait until they finally come through to the fully initialized workbench. Thus I will work on a solution in my fork and send a pull request once it is solved.
;) Best,
Ingmar
System:
mitk version 2015.05.0 (extended by minor customizations [4]) with all external toolkits as defined in superbuild.
QT 5.4.0
NVIDIA driver 353.82 (newest)
[1] http://www.na-mic.org/Bug/view.php?id=3438
[2] http://massmail.spl.harvard.edu/public-archives/slicer-devel/2013/013922.html
[3] https://github.com/commontk/CTK/commit/e4694372310dfa1de4bb654b427083f27d4d091c
[4] https://github.com/iwegner/MITK/tree/v2015.05.0_extended
Callstack:
vtkRenderingOpenGL-6.2d.dll!vtkOpenGLRenderWindow::GetZbufferData(int x1, int y1, int x2, int y2, float * z_data) Line 1440 C++ vtkRenderingOpenGL-6.2d.dll!vtkOpenGLRenderWindow::GetZbufferData(int x1, int y1, int x2, int y2) Line 1477 C++ vtkRenderingCore-6.2d.dll!vtkRenderer::GetZ(int x, int y) Line 1218 C++ vtkRenderingCore-6.2d.dll!vtkWorldPointPicker::Pick(double selectionX, double selectionY, double selectionZ, vtkRenderer * renderer) Line 50 C++ MitkCore.dll!mitk::VtkPropRenderer::PickWorldPoint(const mitk::Point<double,2> & displayPoint, mitk::Point<double,3> & worldPoint) Line 384 C++ MitkCore.dll!mitk::BaseRenderer::Map2DRendererPositionTo3DWorldPosition(const mitk::Point<double,2> & mousePosition) Line 315 C++
MitkQtWidgets.dll!QmitkRenderWindow::mouseMoveEvent(QMouseEvent * me) Line 171 C++
Qt5Widgetsd.dll!QWidget::event(QEvent * event) Line 8649 C++ vtkGUISupportQt-6.2d.dll!QVTKWidget::event(QEvent * e) Line 413 C++ Qt5Widgetsd.dll!QApplicationPrivate::notify_helper(QObject * receiver, QEvent * e) Line 3722 C++ Qt5Widgetsd.dll!QApplication::notify(QObject * receiver, QEvent * e) Line 3280 C++ MitkAppUtil.dll!QmitkSafeNotify<QApplication>(QApplication * app, QObject * receiver, QEvent * event) Line 31 C++ MitkAppUtil.dll!QmitkSafeApplication::notify(QObject * receiver, QEvent * event) Line 36 C++ Qt5Cored.dll!QCoreApplication::notifyInternal(QObject * receiver, QEvent * event) Line 932 C++ Qt5Cored.dll!QCoreApplication::sendSpontaneousEvent(QObject * receiver, QEvent * event) Line 231 C++ Qt5Widgetsd.dll!QApplicationPrivate::sendMouseEvent(QWidget * receiver, QMouseEvent * event, QWidget * alienWidget, QWidget * nativeWidget, QWidget * * buttonDown, QPointer<QWidget> & lastMouseReceiver, bool spontaneous) Line 2751 C++