python - 如何捕捉 Python PyQt5 QTreeWidget 按 Enter(返回)键？

Question

我尝试在按 Enter(返回)键时运行 enterFunc()。但不工作。这是代码，真正的代码是什么？:

class myForm(QMainWindow):

    ...
    def keyPressEvent(self,event):
                    if(event.key()==Qt.Key_Enter):
                        enterFunc()
    ...
    myForm.myTreeWidget.keyPressEvent(self,event)
    ...

Answer 1

第一个 xxxEvent 不是信号，不应该被调用，如果你想监听其中一个，你应该使用如下所示的事件过滤器，另一方面你不应该使用 Qt::Key_Enter 键但 Qt::Key_Return 键:

from PyQt5 import QtCore, QtWidgets, uic


class MainWindow(QtWidgets.QMainWindow):
    def __init__(self, parent=None):
        super(MainWindow, self).__init__(parent)
        uic.loadUi("ui_mainwindow.ui",self)
        self.myTreeWidget.installEventFilter(self)

    def eventFilter(self, obj, event):
        if obj == self.myTreeWidget:
            if  event.type() == QtCore.QEvent.KeyPress:
                if event.key() == QtCore.Qt.Key_Return:
                    print("enter pressed")
        return super(MainWindow, self).eventFilter(obj, event)


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

或更轻松地使用QShortcut:

from PyQt5 import QtCore, QtWidgets, uic


class MainWindow(QtWidgets.QMainWindow):
    def __init__(self, parent=None):
        super(MainWindow, self).__init__(parent)
        uic.loadUi("ui_mainwindow.ui",self)

        shorcut = QtWidgets.QShortcut(QtCore.Qt.Key_Return, 
            self.myTreeWidget, 
            context=QtCore.Qt.WidgetShortcut,
            activated=self.some_function)

    def some_function(self):
        print("some_function")


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