deleteLater of Custom Class

[santosh.kumar]

Hi

I am using Qt 4.8.7 on Windows.

Sample of some code

class MyWidgt: public QWidget
{
     Q_OBJECT
   public:
    MyWidgt(QWidget *parent = 0);
    ~MyWidget();
private:
    QPushButton *p1;
    QLabel *p2;
};
MyWidgt::MyWidgt(QWidget)
{
    p1 = new QPushButton;
    p2 = new QPushButton;
}
MyWidgt::~MyWidgt()
{
p1->deleteLater();
p2->deleteLater();
}
int main(int argc, char*argv[])
{
     MyWidgt *qq = new MyWidgt;
     qq->deleteLater();
 
     or delete qq;
}

class MyWidgt: public QWidget
{
     Q_OBJECT
   public:
    MyWidgt(QWidget *parent = 0);
    ~MyWidget();
private:
    QPushButton *p1;
    QLabel *p2;
};
MyWidgt::MyWidgt(QWidget)
{
    p1 = new QPushButton;
    p2 = new QPushButton;
}
MyWidgt::~MyWidgt()
{
p1->deleteLater();
p2->deleteLater();
}
int main(int argc, char*argv[])
{
     MyWidgt *qq = new MyWidgt;
     qq->deleteLater();
     
     or delete qq;
}

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Kindly tell me which is the best process...
qq->deleteLater();
or delete qq;

[anda_skoa]

Usually p1 and p2 would be children of MyWidget and thus be deleted by MyWidget anyway.

But if you have objects that need deleting like that, just "delete"

Cheers,
_

[santosh.kumar]

Hi
If I do not delete p1 and p2 in destructor, simply qq->deleteLater(), can p1 and p2 as a child will automatically deleted, kindly confirm it. I have a lot of widget allocated in constructor, if I do not delete it individually and simply delete class's object using delete later then it would delete all or not. Kindly confirm it. I am confused..

Thanks
Santosh

[anda_skoa]

It depends if those other widgets, in your case those buttons, are children of another widget.
Usually that will be the case, i.e. the buttons are part of a widget, not stand-alone windows.

In your code snippet above they are not, but then again that is almost certainly not your real code.

Cheers,
_