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pyqtpyqt4python-sip

PyQt4: disable deleting widget after setCentralWidget

I have two custom widgets (two classes based on QtGui.QWidget). In __init__ of QtGui.QMainWindow I create their instances:

self.MyWidget1 = MyWidget1()
self.MyWidget2 = MyWidget2()

There are also two buttons (QtGui.QPushButton) in __init__ part, and there are two slots when user clicks each of them:

def clickButton1(self):
  self.setCentralWidget(self.MyWidget1)

def clickButton2(self):
  self.setCentralWidget(self.MyWidget2)

But it works only on first click and then PyQt says that underlying widget (MyWidget1 or MyWidget2) was deleted. I think it was done by sip module. Is there a way to prevent deleting widgets after reseting of central widget? Thanks!

Solution

  • I think it's almost impossible.

    From setCentralWidget docs:

    Note: QMainWindow takes ownership of the widget pointer and deletes it at the appropriate time.

    So, you should create new MyWidget instance.

    def clickButton2(self):
    self.setCentralWidget(MyWidget2())

    But the right way of doing such things is to use QStackedWidget