[Qt-interest] QMdiSubWindow WA_DeleteOnClose problem

[Vidit...]

Thanks for reply Alex,

The instance of QMdiArea is not deleted, infact there are other instances of
QMdiSubWindows still open (in the same QMdiArea), so the slot should be
called, right?

Vidit


On Tue, Jan 19, 2010 at 7:31 PM, Malyushytsky, Alex <alex at wai.com> wrote:

> Your slot might never be called cause its owner ( instance of  QMdiArea)
> might be  already deleted.
> Check under the debugger if TraceWindowArea instance is deleted  before
>  Window.
>
> Regards,
>     Alex
>
>
>
>
> From: qt-interest-bounces at trolltech.com [mailto:
> qt-interest-bounces at trolltech.com] On Behalf Of Vidit...
> Sent: Tuesday, January 19, 2010 8:37 AM
> To: qt-interest at trolltech.com
> Subject: [Qt-interest] QMdiSubWindow WA_DeleteOnClose problem
>
> Hello
>
> I have just started learning QT and I'm doing pretty well. But I'm stuck on
> this problem for weeks now. If someone could help me, I appreciate.
>
> I create a QMdiSubwindow and set its attribute to DeleteOnClose.
> The signal destroyed(QObject*) is connected to a custom slot.
>
> The problem is when I call delete QMdiSubWindow explicitly (in the code),
> the slot is called, but if I close the window using GUI, the subwindow gets
> deleted but the slot is never called.
>
> Here is the simplified code:
>
>
> class TraceWindowArea : public QMdiArea
> {
>    Q_OBJECT
> public:
>    TraceWindowArea(QWidget *parent);
>
> public slots:
>    void openNewWindow(const HostStruct *);
>
> private slots:
>    void TraceWindowClosing(QObject*);
>
>    //some other stuff too...
> };
>
> void TraceWindowArea::openNewWindow()
> {
>        Window = new QMdiSubWindow(this);
>
>        Window->setAttribute(Qt::WA_DeleteOnClose);
>
>        QTextEdit *TextBrowser = new QTextEdit(Window);
>        Window->setWidget(TextBrowser);
>
>        Window->show();
>
>        connect(Window, SIGNAL(destroyed(QObject*)), this,
> SLOT(TraceWindowClosing(QObject*)));
> }
>
> void TraceWindowArea::TraceWindowClosing(QObject* ClosingWindow)
> {
>    //just for testing purpose
>    QWidget * a = new QWidget(0);
>    a->show();
> }
>
>
> Thanks
> Vidit
>
>
>
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