how to get the type of the QMdiSubWindow

[xiongxiongchuan]

i have severl different type of widget using in QMdiArea,i want to update the menus and the action status as the widgets changes,i used the

QMdiSubWindow * QMdiArea::activeSubWindow () const

QMdiSubWindow * QMdiArea::activeSubWindow () const

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the get the current active QMdiSubWindow.but i want to know which widget it is ?
how?
thank you in andvance

[ChrisW67]

The return from QMdiArea::activeSubWindow() is always a pointer to a QMdiSubWindow. What you are trying to determine is the class of the widget contained inside the QMdiSubWindow. You can do that with qobject_cast:

QMdiSubWindow *sw = mdiArea->activeSubWindow();
if (sw) {
  if (FooWidget *foo = qobject_cast<FooWidget*>(sw->widget())) {
    // do something FooWidget specific
  }
  else if (BarWidget *bar = qobject_cast<BarWidget*>(sw->widget())) {
    // do something BarWidget specific
  }
}

QMdiSubWindow *sw = mdiArea->activeSubWindow();
if (sw) {
  if (FooWidget *foo = qobject_cast<FooWidget*>(sw->widget())) {
    // do something FooWidget specific
  }
  else if (BarWidget *bar = qobject_cast<BarWidget*>(sw->widget())) {
    // do something BarWidget specific
  }
}

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You probably want to do this work in a slot attached to the subWindowActivated() signal.

If you have widgets of the same class but with different purposes then you could use the QObject::name() to differentiate them.

You could just keep a track of the QMdiSubwindow pointers you got when you created the the sub windows and compare those to the active one.