def METHOD_NAME(self, event):
    """Process clicks on toggle buttons"""
    clickedBtn = event.EventObject
    if wx.GetMouseState().GetModifiers() == wx.MOD_CONTROL:
        activeBtns = [btn for btn in self.metaButtons if btn.GetValue()]
        if activeBtns:
            clickedBtn.setUserSelection(clickedBtn.GetValue())
            self.itemView.filterItemStore()
        else:
            # Do 'nothing' if we're trying to turn last active button off
            # Keep button in the same state
            clickedBtn.setUserSelection(True)
    else:
        for btn in self.metaButtons:
            btn.setUserSelection(btn == clickedBtn)
        self.itemView.filterItemStore()