QListWidgetItem Destroyer and Release Memory

[isaacEnrique]

Best regards

In the event that the data attribute of a QListWidgetItem is put to a pointer to an object created dynamically (with new): The object in question is destroyed, and the corresponding memory is released when the destroyer of the QListWidgetItem is invoked?

Thanks for any responses and/or comments

[kshegunov]

@isaacEnrique
I don't follow, what is the issue?

[mrjj]

Hi
Do you mean
if you new your own object, say new MyData
and then put Mydata into widgetitem via setData

so the variant holds a pointer to Mydata

Then it will not be deleted (as far as i can see)
when QListWidgetItem is deleted.

[isaacEnrique]

@kshegunov My post is not a issue, rather it is a practice question. The answer will tell me if I should release the memory myself (with 'delete') or if I can relax and trust the destroyer of QListWidgetItem.

[isaacEnrique]

@mrjj Certainly, I thought so. The documentation did not seem clear about

[mrjj]

@isaacEnrique
Well since its stored in a QVariant, it means that
it can be any value. so it cannot know if a pointer or a "direct" type so
would be hard for it to delete it.

But, you might be able to wrap the pointer in a scope smart pointer and when scoped is deleted pr auto, then it deletes the actual Myclass also.

[dheerendra]

You need to release the memory on your own if data you placed inside QListWidgetItem is allocated using new.