[Paraview-developers] How to get active session from a plugin ?

houssen houssen at ipgp.fr
Thu Aug 6 17:34:23 EDT 2015 

I get this :

Program received signal SIGSEGV, Segmentation fault.
0x00007ffff1e3db76 in vtkObjectBase::GetClassName (this=0x0) at 
/home/houssen/Programs/ParaView/ParaView-v4.3.1-source/VTK/Common/Core/vtkObjectBase.cxx:112
112	  return this->GetClassNameInternal();
(gdb) l
107	  return this->GetClassNameInternal();
108	}
109	#endif
110	const char* vtkObjectBase::GetClassName() const
111	{
112	  return this->GetClassNameInternal();
113	}
114
115	int vtkObjectBase::IsTypeOf(const char *name)
116	{
(gdb) bt
#0  0x00007ffff1e3db76 in vtkObjectBase::GetClassName (this=0x0) at 
/home/houssen/Programs/ParaView/ParaView-v4.3.1-source/VTK/Common/Core/vtkObjectBase.cxx:112
#1  0x00007fffc07f0fb4 in slvPrvExporter::WriteData (this=0x57be820) at 
/mnt/users/houssen/Documents/myExporter/myExporter.cpp:125
#2  0x00007fffd1db7971 in vtkExporter::Write (this=0x57be820) at 
/home/houssen/Programs/ParaView/ParaView-v4.3.1-source/VTK/IO/Export/vtkExporter.cxx:65
#3  0x00007ffff493bab2 in vtkSMRenderViewExporterProxy::Write 
(this=0x4e621f0)
     at 
/home/houssen/Programs/ParaView/ParaView-v4.3.1-source/ParaViewCore/ServerManager/Default/vtkSMRenderViewExporterProxy.cxx:58
#4  0x00007ffff7af57c5 in pqExportReaction::exportActiveView 
(this=0xa9d0e0)
     at 
/home/houssen/Programs/ParaView/ParaView-v4.3.1-source/Qt/ApplicationComponents/pqExportReaction.cxx:170
#5  0x00007ffff7b56b1c in pqExportReaction::onTriggered (this=0xa9d0e0)
     at 
/home/houssen/Programs/ParaView/ParaView-v4.3.1-source/BUILD/Qt/ApplicationComponents/../../../Qt/ApplicationComponents/pqExportReaction.h:59
#6  0x00007ffff7b5abc6 in pqReaction::qt_static_metacall (_o=0xa9d0e0, 
_c=QMetaObject::InvokeMetaMethod, _id=0, _a=0x7fffffffd120)
     at 
/home/houssen/Programs/ParaView/ParaView-v4.3.1-source/BUILD/Qt/ApplicationComponents/moc_pqReaction.cxx:51
#7  0x00007ffff581087a in QMetaObject::activate 
(sender=sender at entry=0xa945d0, m=m at entry=0x7ffff67d7de0 
<QAction::staticMetaObject>,
     local_signal_index=local_signal_index at entry=1, 
argv=argv at entry=0x7fffffffd120) at kernel/qobject.cpp:3539
#8  0x00007ffff5d27a62 in QAction::triggered (this=this at entry=0xa945d0, 
_t1=false) at .moc/release-shared/moc_qaction.cpp:276
#9  0x00007ffff5d29433 in QAction::activate (this=this at entry=0xa945d0, 
event=event at entry=QAction::Trigger) at kernel/qaction.cpp:1257
#10 0x00007ffff6157509 in QMenuPrivate::activateCausedStack 
(this=this at entry=0x86c610, causedStack=..., 
action=action at entry=0xa945d0,
     action_e=action_e at entry=QAction::Trigger, self=self at entry=true) at 
widgets/qmenu.cpp:1038
#11 0x00007ffff615ba39 in QMenuPrivate::activateAction (this=0x86c610, 
action=0xa945d0, action_e=QAction::Trigger, self=<optimized out>) at 
widgets/qmenu.cpp:1130
#12 0x00007ffff5d7d51a in QWidget::event (this=this at entry=0x8fa300, 
event=event at entry=0x7fffffffd720) at kernel/qwidget.cpp:8376
#13 0x00007ffff615f83b in QMenu::event (this=0x8fa300, 
e=0x7fffffffd720) at widgets/qmenu.cpp:2481
#14 0x00007ffff5d2de2c in QApplicationPrivate::notify_helper 
(this=this at entry=0x6faae0, receiver=receiver at entry=0x8fa300, 
e=e at entry=0x7fffffffd720)
     at kernel/qapplication.cpp:4567
#15 0x00007ffff5d345dd in QApplication::notify (this=<optimized out>, 
receiver=0x8fa300, e=0x7fffffffd720) at kernel/qapplication.cpp:4110
#16 0x00007ffff57fc4dd in QCoreApplication::notifyInternal 
(this=0x7fffffffdea0, receiver=receiver at entry=0x8fa300, 
event=event at entry=0x7fffffffd720)
     at kernel/qcoreapplication.cpp:953
#17 0x00007ffff5d33d93 in sendEvent (event=<optimized out>, 
receiver=<optimized out>) at 
../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#18 QApplicationPrivate::sendMouseEvent 
(receiver=receiver at entry=0x8fa300, event=event at entry=0x7fffffffd720, 
alienWidget=alienWidget at entry=0x0,
     nativeWidget=nativeWidget at entry=0x8fa300, 
buttonDown=buttonDown at entry=0x7ffff6813318 <qt_button_down>, 
lastMouseReceiver=..., spontaneous=spontaneous at entry=true)
     at kernel/qapplication.cpp:3178
#19 0x00007ffff5da8d1c in QETWidget::translateMouseEvent 
(this=this at entry=0x8fa300, event=event at entry=0x7fffffffda70) at 
kernel/qapplication_x11.cpp:4568
#20 0x00007ffff5da8289 in QApplication::x11ProcessEvent 
(this=0x7fffffffdea0, event=event at entry=0x7fffffffda70) at 
kernel/qapplication_x11.cpp:3627
#21 0x00007ffff5dcfb32 in x11EventSourceDispatch (s=0x7014c0, 
callback=0x0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#22 0x00007fffebe71e04 in g_main_context_dispatch () from 
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#23 0x00007fffebe72048 in ?? () from 
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#24 0x00007fffebe720ec in g_main_context_iteration () from 
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#25 0x00007ffff58297a1 in QEventDispatcherGlib::processEvents 
(this=0x716010, flags=...) at kernel/qeventdispatcher_glib.cpp:434
#26 0x00007ffff5dcfbe6 in QGuiEventDispatcherGlib::processEvents 
(this=<optimized out>, flags=...) at 
kernel/qguieventdispatcher_glib.cpp:204
#27 0x00007ffff57fb0af in QEventLoop::processEvents 
(this=this at entry=0x7fffffffde40, flags=...) at kernel/qeventloop.cpp:149
#28 0x00007ffff57fb3a5 in QEventLoop::exec 
(this=this at entry=0x7fffffffde40, flags=...) at kernel/qeventloop.cpp:204
#29 0x00007ffff5800b79 in QCoreApplication::exec () at 
kernel/qcoreapplication.cpp:1225
#30 0x00000000004094e6 in main (argc=1, argv=0x7fffffffdfd8) at 
/home/houssen/Programs/ParaView/ParaView-v4.3.1-source/BUILD/Applications/ParaView/paraview_main.cxx:115


Le 2015-08-06 23:12, Sebastien Jourdain a écrit :
> Something else must be wrong. No matter what you should be able to 
> get
> the ProxyManager.
>
> What does the debugger tell you about the cause of the crash?
>
> Seb
>
> On Thu, Aug 6, 2015 at 3:08 PM, houssen <houssen at ipgp.fr [11]> wrote:
>
>> Unfortunately, the code crashes when I call
>> vtkSMProxyManager::GetProxyManager ().
>> Is there another way ?
>>
>> Franck
>>
>> Le 2015-08-06 16:32, Sebastien Jourdain a écrit :
>>
>>> Try that:
>>>
>>> vtkSMProxyManager::GetProxyManager()->GetActiveSession()
>>>
>>> On Thu, Aug 6, 2015 at 2:50 AM, houssen <houssen at ipgp.fr [5]
>>> [5]> wrote:
>>>
>>>> Hello,
>>>>
>>>> In ParaView, from an exporter plugin, how can I get the active
>>>> session ? (= session associated to the plugin in order later
>>>> on to
>>>> scan over vtkSMProxy)
>>>>
>>>> Following some code samples found in
>>>> /ParaViewCore/ClientServerCore/Rendering, I tried to do :
>>>> vtkProcessModule * pProcMgr =
>>>> vtkProcessModule::GetProcessModule
>>>> ();
>>>> vtkSMSession * pSession = ( pProcMgr ) ?
>>>> vtkSMSession::SafeDownCast ( pProcMgr -> GetActiveSession () )
>>>> :
>>>> NULL;
>>>> I get pProcMgr != NULL but pSession = NULL
>>>>
>>>> Franck
>>>>
>>>> PS : I run Ubuntu-14.04 and use ParaView-4.3.1 (built from
>>>> source).
>>>>
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