Parent passed to QPushButton's constructor

I have been following this thread: Memory management in Qt?

QPushButton::QPushButton ( const QString & text, QWidget * parent = 0 )

So, in an example I saw the following way of creating push button开发者_运维百科's object. My concern is the second parameter, "parent", a this pointer has been passed there, does it mean that this widget is its own parent? I know I am missing a point, please point it out.

button1 = new QPushButton("Button1", this);

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Be careful, this does not refer to the QPushButton.

This line of code :

button1 = new QPushButton("Button1", this);

is probably part of a QWidget-based class, and that's the one thisrefers to !

That means the QWidget-based class is the owner of the QPushButton it is displaying.

It also means that when the instance of the QWidget-based class is deleted, it will delete all its children elements, which means the QPushButton button1 will be deleted as well, automatically.

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Yes the parent you set here is the widget you're, you use parent parameter on controls of almost any GUI Framework to know where the control is.

See you