使用 PyQt 居中不可编辑的 QComboBox 文本

Question

是否可以更改不可编辑的 QComboBox 的文本对齐方式？这个答案通过使 QComboBox 可编辑来实现这一点

How to center text in QComboBox?

但是，我不希望这样，因为通过该更改，触发列表的 ComboBox 的可点击部分现在只是右侧的箭头，而在整个区域可点击并触发下拉菜单之前。

Answer 1

部分答案已在链接问题How to center text in QComboBox? 中给出 剩下的就是使只读对象可点击。这可以按照here 的建议来完成。 ...给你以下代码：

from PyQt4 import QtGui, QtCore

class Window(QtGui.QWidget):
    def __init__(self):
        QtGui.QWidget.__init__(self)
        layout = QtGui.QVBoxLayout(self)
        self.combo = QtGui.QComboBox()
        self.combo.setEditable(True)
        self.ledit = self.combo.lineEdit()
        self.ledit.setAlignment(QtCore.Qt.AlignCenter)
        # as suggested in the comment to 
        # https://stackoverflow.com/questions/23770287/how-to-center-text-in-qcombobox
        self.ledit.setReadOnly(True) # 
        self.combo.addItems('One Two Three Four Five'.split())
        layout.addWidget(self.combo)
        self.clickable(self.combo).connect(self.combo.showPopup)
        self.clickable(self.ledit).connect(self.combo.showPopup)

    def clickable(self,widget):
        """ class taken from 
        https://wiki.python.org/moin/PyQt/Making%20non-clickable%20widgets%20clickable """
        class Filter(QtCore.QObject):
            clicked = QtCore.pyqtSignal()
            def eventFilter(self, obj, event):
                if obj == widget:
                    if event.type() == QtCore.QEvent.MouseButtonRelease:
                        if obj.rect().contains(event.pos()):
                            self.clicked.emit()
                            # The developer can opt for .emit(obj) to get the object within the slot.
                            return True
                return False
        filter = Filter(widget)
        widget.installEventFilter(filter)
        return filter.clicked

if __name__ == '__main__':

    import sys
    app = QtGui.QApplication(sys.argv)
    window = Window()
    window.show()
    sys.exit(app.exec_())