Python Qmodelindex Internalpointer Returning Random Objects And .internalpointer() should give me a criterionnode object, but sometimes i get corrupt data, criterionnode semi empty objects or totally random objects. i even got objects (like line2d objects) belonging to the matplotlib chart, whose logic is separated from the tree model. The cause of the issue is that pyside2 does not maintain a handle of the object so python was destroying the objects between creating the index and accessing them later.
Python Qmodelindex Internalpointer Returning Random Objects And Internalpointer () is only valid for the current session. you cannot save a qmodelindex to a file and expect its internalpointer () to work later, as the memory addresses will be different when the program runs again. Returns a pointer to the model containing the item that this index refers to. a const pointer to the model is returned because calls to non const functions of the model might invalidate the model index and possibly crash your application. Basically, the problem is with the createindex () method, which accepts row column and a pointer to a custom tree item object. since in python there are no pointer, i tried passing just the object itself (as usual), but it failed with errors like this one:. I also have problems with it. i can't say exactly, when crash occurs, and when it doesn't, but, this code generates crash for me: index = self.createindex (row, column, true) print index.internalpointer () i tried to pass object (which has other references, so, is not destroyed by gc), integer, bool value as internalpoitner, and have crashes in.
Qmodelindex Internalpointer Returning Random Objects And Crashing Basically, the problem is with the createindex () method, which accepts row column and a pointer to a custom tree item object. since in python there are no pointer, i tried passing just the object itself (as usual), but it failed with errors like this one:. I also have problems with it. i can't say exactly, when crash occurs, and when it doesn't, but, this code generates crash for me: index = self.createindex (row, column, true) print index.internalpointer () i tried to pass object (which has other references, so, is not destroyed by gc), integer, bool value as internalpoitner, and have crashes in. An invalid model index can be constructed with the qmodelindex constructor. invalid indexes are often used as parent indexes when referring to top level items in a model. When reimplementing this function in a subclass, be careful to avoid calling qmodelindex member functions, such as qmodelindex::parent (), since indexes belonging to your model will simply call your implementation, leading to infinite recursion. Turned out that using internalpointer as the only place to store your object can lead to garbage collection issues and corruption. it would return broken instances of my items. 但调用removerow ()后，有时会因为qmodelindex.internalpointer ()访问异常（也就是野指针）而崩溃。 其实是因为qmodelindex在删除行后依然残留的问题，但是这个qmodelindex.internalpointer ()早已析构。.
Qmodelindex Internalpointer Returning Random Objects And Crashing An invalid model index can be constructed with the qmodelindex constructor. invalid indexes are often used as parent indexes when referring to top level items in a model. When reimplementing this function in a subclass, be careful to avoid calling qmodelindex member functions, such as qmodelindex::parent (), since indexes belonging to your model will simply call your implementation, leading to infinite recursion. Turned out that using internalpointer as the only place to store your object can lead to garbage collection issues and corruption. it would return broken instances of my items. 但调用removerow ()后，有时会因为qmodelindex.internalpointer ()访问异常（也就是野指针）而崩溃。 其实是因为qmodelindex在删除行后依然残留的问题，但是这个qmodelindex.internalpointer ()早已析构。.
Qmodelindex Internalpointer Returning Random Objects And Crashing Turned out that using internalpointer as the only place to store your object can lead to garbage collection issues and corruption. it would return broken instances of my items. 但调用removerow ()后，有时会因为qmodelindex.internalpointer ()访问异常（也就是野指针）而崩溃。 其实是因为qmodelindex在删除行后依然残留的问题，但是这个qmodelindex.internalpointer ()早已析构。.
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