[FIXED] PyQT: How to set Combobox Read-Only

Issue

I know there is .setEnabled(bool) method available for Combobox widget. But aside from making it unavailable this method grays this widget out. What I need is to set Combobox so it appears an active but yet remains read only. Any ideas?

Solution

One way to do this would be to clobber the appropriate event handlers. This could be done with either a subclass:

class ComboBox(QtGui.QComboBox):
    def __init__(self, parent):
        QtGui.QComboBox.__init__(self, parent)
        self.readonly = False

    def mousePressEvent(self, event):
        if not self.readonly:
            QtGui.QComboBox.mousePressEvent(self, event)

    def keyPressEvent(self, event):
        if not self.readonly:
            QtGui.QComboBox.keyPressEvent(self, event)

    def wheelEvent(self, event):
        if not self.readonly():
            QtGui.QComboBox.wheelEvent(self, event)

or with an event-filter:

class Window(QtGui.QWidget):
    def __init__(self):
        QtGui.QWidget.__init__(self)  
        self.combo = QtGui.QComboBox(self)
        self.combo.readonly = False
        self.combo.installEventFilter(self)
        ...

    def eventFilter(self, source, event):
        if (source is self.combo and self.combo.readonly and (
            event.type() == QtCore.QEvent.MouseButtonPress or
            event.type() == QtCore.QEvent.KeyPress or
            event.type() == QtCore.QEvent.Wheel)):
            return True
        return QtGui.QWidget.eventFilter(self, source, event)

Personally, though, I would prefer to either disable the combo box, or perhaps reset its list of items so there was only one choice.

Answered By - ekhumoro