Python PyQt5.QtCore.Qt 模块，AltModifier() 实例源码

def _doubleClicked(self, index):
        model = self.model()
        if model is None:
            return
        data = model.data(index)
        if isinstance(data, QColor):
            if QApplication.keyboardModifiers() & Qt.AltModifier:
                model.setData(index, QColor())
            else:
                dialog = QColorDialog(self)
                dialog.setCurrentColor(data)
                dialog.setOption(QColorDialog.ShowAlphaChannel)
                ret = dialog.exec_()
                if ret:
                    color = dialog.currentColor()
                    model.setData(index, color)

    # -------------------
    # Convenience methods
    # -------------------

def key_event_sequence(event):
        val = event.key()
        mod = event.modifiers()
        if mod & Qt.ShiftModifier:
            val += Qt.SHIFT
        if mod & Qt.ControlModifier:
            val += Qt.CTRL
        if mod & Qt.AltModifier:
            val += Qt.ALT
        if mod & Qt.MetaModifier:
            val += Qt.META
        return QKeySequence(val)

def translateModifiers(self, state, text):
        result = 0
        if ((state & Qt.ShiftModifier) and (len(text) == 0 or not text[0].isprintable() or text[0].isalpha() or text[0].isspace())):
            result |= Qt.SHIFT
        if (state & Qt.ControlModifier):
            result |= Qt.CTRL
        if (state & Qt.MetaModifier):
            result |= Qt.META
        if (state & Qt.AltModifier):
            result |= Qt.ALT
        return result

def eventFilter(self, source, event):
        """ Add/remove a few keyboard and mouse events. """
        if source is self.searchQuery:
            if event.type() == QEvent.KeyPress:
                if event.key() == Qt.Key_Return:
                    if event.modifiers() == Qt.ShiftModifier:
                        self.on_arxiv_clicked()
                        return True
                    elif event.modifiers() == Qt.ControlModifier:
                        self.on_msn_clicked()
                        return True
                    elif event.modifiers() == Qt.AltModifier:
                        self.on_zbl_clicked()
                        return True
        return QMainWindow.eventFilter(self, source, event)

def keyPressEvent(self, event):
        if event.key() & Qt.Key_Return:
            if self._mayClearColor and event.modifiers() & Qt.AltModifier:
                self.setColor(None)
            else:
                self.pickColor()
        else:
            super(ColorVignette, self).keyPressEvent(event)

def mousePressEvent(self, event):
        if self._mayClearColor and event.modifiers() & Qt.AltModifier:
            self.setColor(None)
        else:
            super(ColorVignette, self).mousePressEvent(event)

def scaleModifier():
    if sys.platform == "darwin":
        return Qt.AltModifier
    return Qt.ControlModifier