qt smart pointer

[sajis997]

Hello forum,

I have declared a class as follows:

class Item : public QObject, QGraphicsItem
{
 
private:
 
         //the following is turn also a sub-class of QObject
         TextGraphicsItem *m_text;
 
 
 
};

class Item : public QObject, QGraphicsItem
{
    
private:
      
         //the following is turn also a sub-class of QObject
         TextGraphicsItem *m_text;

          

};

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Do i have to delete explicitly m_text in the destrucor or Qt will take care of it to delete the memory?



Thanks
Sajjad

[stampede]

QObject automatically deletes it's child objects, so if you pass a parent pointer to m_text constructor, it will be deleted if the parent is deleted.

[Zlatomir]

It depends:
If TextGraphicsItem isn't an QObject derived class, or if it doesn't have a parent (parent pointer is 0) you will need to delete it in ~Item().

If it take this (or other QObject pointer) as a parent you don't need to delete it manually, it will be deleted by the parent.

[wysota]

So far you just have a pointer so you don't have to delete anything. Once you initialize it with some object we can start talking about it.

[Lykurg]

Or use QScopedPointer and we don't need to talk about