How do you notify an app that the active document is closed ?

[CLEMENT]

How do you notify an app that the active document is closed ?

Problem statement:
My app is currently listening to a state updater event:

SBSimulatorEvent::StateUpdateEnd

but when I close the document my app is not notified and tries to address some elements that are not anymore in the datagraph and therefore crash...

[Yassine]

Hi Clement,

To listen to the document closed signal I connect my nodes to a custom signal like this:

SB_FOR(SBNode* node, atomIndexer) node->connectBaseSignalToSlot(this, SB_SLOT(&SENormalModesAnalysisApp::onBaseEvent));

Then, in my onBaseEvent function I catch the NodeEraseBegin event which corresponds to the signal emitted when the document is closed or the nodes erased.

void SENormalModesAnalysisApp::onBaseEvent(SBBaseEvent* event) {

if (event->getType() == SBBaseEvent::NodeEraseBegin) {

//disconnet the connected nodes		
SB_FOR(SBNode* node, atomIndexer)
{node->disconnectBaseSignalFromSlot(this, SB_SLOT(&SENormalModesAnalysisApp::onBaseEvent));
}

//....//

}

Remember to disconnect the connected nodes.
Hope I answered your question,
Yassine