如何在 PyQT5 对话窗口中记录按下的组合键

2022-01-12 00:00:00 python pyqt pyqt5 key-bindings

问题描述

我从主窗口打开对话框，通过夹住键，我在行中填入它们的名称.问题是我不明白你需要在哪里循环检查所有键的状态.也许还有另一种方法可以按下按键?或者哪里需要监听，让对话框不挂起，字符串更新.

I open the dialog from the main window, where by clamping the keys, I fill the line with their names. The problem is that I can not understand where you need to do a cycle of checking all the keys on their state. Maybe there is another way to get the keys pressed? Or where you need to listen to the clamping so that the dialog box does not hang and the string is updated.

MainWindow:
    def showBindings(self, param):
        from dialogs import KeyBindingsDialog
        self.dialog = KeyBindingsDialog()
        self.dialog.show()

Dialog:
class KeyBindingsDialog(QtWidgets.QDialog):
    def __init__(self, parent=None):
        super(KeyBindingsDialog, self).__init__(parent)
        self.ui = KeyBindings()
        self.ui.setupUi(self)

解决方案

使用QKeySequenceEdit:

Use QKeySequence

from PyQt5 import QtCore, QtGui, QtWidgets

class KeySequenceEdit(QtWidgets.QKeySequenceEdit):
    def keyPressEvent(self, event):
        super(KeySequenceEdit, self).keyPressEvent(event)
        seq_string = self.keySequence().toString(QtGui.QKeySequence.NativeText)
        if seq_string:
            last_seq = seq_string.split(",")[-1].strip()
            le = self.findChild(QtWidgets.QLineEdit, "qt_keysequenceedit_lineedit")
            self.setKeySequence(QtGui.QKeySequence(last_seq))
            le.setText(last_seq)
            self.editingFinished.emit()


class Widget(QtWidgets.QWidget):
    def __init__(self, parent=None):
        super(Widget, self).__init__(parent)
        self._keysequenceedit = KeySequenceEdit(editingFinished=self.on_editingFinished)
        button = QtWidgets.QPushButton("clear", clicked=self._keysequenceedit.clear)
        hlay = QtWidgets.QHBoxLayout(self)
        hlay.addWidget(self._keysequenceedit)
        hlay.addWidget(button)

    @QtCore.pyqtSlot()
    def on_editingFinished(self):
        sequence = self._keysequenceedit.keySequence()
        seq_string = sequence.toString(QtGui.QKeySequence.NativeText)
        print("sequence: ", seq_string)

if __name__ == '__main__':
    import sys 
    app = QtWidgets.QApplication(sys.argv)
    w = Widget()
    w.show()
    sys.exit(app.exec_())

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