Python PyQt 事件未被忽略

Question

我在代码中使用典型的子类化对 qtextedit 进行了子类化，但不知何故，即使我的信号工作正常，event.ignore 也无法工作。目标是捕获 Enter 键并单击按钮，但不在 qtextedit 上提交 Enter。

我的代码在这里：

from PyQt5 import QtCore, QtGui, QtWidgets
from PyQt5.QtWidgets import QAction
from PyQt5.QtGui import QPalette
from PyQt5.QtCore import QThread , pyqtSignal

class TextEdit(QtWidgets.QTextEdit):
    keyPressed = QtCore.pyqtSignal(QtCore.QEvent)
    keyPressed2 = pyqtSignal()
    
    def __init__(self, parent=None):
        super(TextEdit, self).__init__(parent)
        self.setGeometry(QtCore.QRect(30, 100, 331, 71))
        self.setStyleSheet("font: 10pt \"MS Shell Dlg 2\";")
        self.raise_()
        self.setFocus()
        self.setPlaceholderText("Set 4 character ICAO Locator here , divided by spaces...")
        self.keyPressed.connect(self.on_key)
        
        
    def keyPressEvent(self,event):
        super(TextEdit, self).keyPressEvent(event)
        self.keyPressed.emit(event) 
    
    def on_key(self, event):
        if event.key() == QtCore.Qt.Key_Return or event.key() == QtCore.Qt.Key_Enter:
            event.ignore()
            self.keyPressed2.emit()


class Ui_MainWindow(object):
    def setupUi(self, MainWindow):
        MainWindow.setObjectName("MainWindow")
        MainWindow.resize(1371, 924)
        MainWindow.setAcceptDrops(True)


        self.T_aerodromes_input = TextEdit(self.centralWidget)
        self.T_aerodromes_input.keyPressed2.connect(self.B_aerodrome_data.click)

        self.B_aerodrome_data = QtWidgets.QPushButton(self.centralWidget)
        self.B_aerodrome_data.setGeometry(QtCore.QRect(670, 100, 271, 41))
        self.B_aerodrome_data.setObjectName("B_aerodrome_data")

if __name__ == "__main__":
    import sys
    app = QtWidgets.QApplication(sys.argv)
    MainWindow = QtWidgets.QMainWindow()
    ui = Ui_MainWindow()
    ui.setupUi(MainWindow)
    MainWindow.show()
    sys.exit(app.exec_())
        

Answer 1

如果你只想过滤回车或返回键，那么只需验证它们不是那些键，如果它们不是那些键，则调用父亲的方法，否则，不要这样做。

def keyPressEvent(self,event):
    if event.key() not in (QtCore.Qt.Key_Return, QtCore.Qt.Key_Enter):
         super(TextEdit, self).keyPressEvent(event)
    else:
         self.keyPressed.emit(event)