如何在 QComboBox 中标记当前项目文本? [英] how to mark current item text in QComboBox?

问题描述

我将组合框用作带有历史记录的简单命令行.

I'm using a combo box as a simple command line with a history.

这是信号槽定义:

QtWidgets.QShortcut(QtGui.QKeySequence(QtCore.Qt.Key_Return),
                    self.comboBox_cmd,
                    activated=self.queryLine)

...和插槽:

@QtCore.pyqtSlot()
def queryLine(self):
    '''
    Read cmd string from widget and write to device.
    '''
    ## comboBox can be enhanced with a history
    cmd = self.comboBox_cmd.currentText()
    cmds = [self.comboBox_cmd.itemText(i) for i in range(self.comboBox_cmd.count())]
    if not cmds or cmds[-1] != cmd:
    self.comboBox_cmd.addItem(cmd)
    self.query(cmd)

这真的很好用.现在，如何在按 Enter 后标记当前项目的整个文本，以便我可以根据需要替换整行?

This works really well. Now, how can I mark the entire text of the current item after pressing Enter, so that I can replace the whole line if I so wish?

推荐答案

你可以通过捕捉回车/回车键自动选择行编辑的文本:

You can automatically select the text of the line edit by catching the return/enter key press:

class SelectCombo(QtWidgets.QComboBox):
    def keyPressEvent(self, event):
        # call the base class implementation
        super().keyPressEvent(event)
        # if return/enter is pressed, select the text afterwards
        if event.key() in (QtCore.Qt.Key_Return, QtCore.Qt.Key_Enter):
            self.lineEdit().selectAll()

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