Why no memory gets freed after closeEvent?

[Tapsa]

I have an application that needs to launch separate main windows, because I need to copy data between them. I could use shared memory between separate processes, but it is much easier to be able to dynamically open and close multiple main windows.

void AGEMainWindow::closeEvent(QCloseEvent *event)
{
    --AGEMainWindow::openEditors;
    if(true)
    {
        event->accept();
    }
    else
    {
        event->ignore();
    }
}

The auto-generated destructor deletes user interface. Either it is not called or it doesn't free any memory.

How do I completely delete and free all user interface memory when closing one main window?

In wxWidgets this was achieved using only:

Destroy();

[mcosta]

Hi,

how do you create instances of AGEMainWindow??
You can use the Window Attribute Qt::WA_DeleteOnClose.
For instance in the constructor you can do

AGEMainWindow::AGEMainWindow(const QWidget* _parent)
    : QMainWindow(_parent)
{
    setAttribute(Qt::WA_DeleteOnClose, true);
    ...
}

So after the closeEvent is accepted the Window object will be destroyed

[alex_malyu]

By default close does not delete anything.
It just hides the window.

Widget can have attribute WA_DeleteOnClose set as mentioned above,
But if you want to handle deletion yourself you normally just call
delete yourself.