Question

Maybe this is been asked many times, but i can’t find a solution.

I have a dialog:

class PostDialog(QtGui.QDialog):
    def __init__(self, parent=None):
        QtGui.QDialog.__init__(self, parent)
        self.ui = Ui_Dialog() #code from designer!!
        self.ui.setupUi(self)

        self.ui.plainTextEdit = ContentEditor()

This dialog has a QPlainTextEdit from the designer.

I need to override keyPress and keyRelease of that QPlainTextEdit.

So i have subclassed it:

class ContentEditor(QtGui.QPlainTextEdit):

    def __init__(self, parent=None):
        QtGui.QPlainTextEdit.__init__(self, parent)

    def keyPressEvent(self, event):
        print "do something"

but ContentEditor.keyPressEvent is never called! Why?

Answer 1

I recommend using installEventFilter for this purpose:

This would look like:

class PostDialog(QtGui.QDialog):
    def __init__(self, parent=None):
        QtGui.QDialog.__init__(self, parent)
        self.ui = Ui_Dialog() #code from designer!!
        self.ui.setupUi(self)

        self.ui.plainTextEdit.installEventFilter(self)

    def eventFilter(self, event):
        if event.type() == QtCore.QEvent.KeyPress:
            # do some stuff ...
            return True # means stop event propagation
        else:
            return QtGui.QDialog.eventFilter(self, event)