将keyPressEvent添加到PyQT

Question

我有一个现有的PyQT代码：

class MainWindow(QMainWindow, WindowMixin):

    def __init__(self, filename=None):
        super(MainWindow, self).__init__()
        self.setWindowTitle(__appname__)
    ...
    def resizeEvent(self, event):
    def queueEvent(self, event):

我添加了keyPressEvent：

def keyPressEvent(self, event):
    print "pressed"

事实证明，当我在QMainWindow中的某个小部件中输入文本时，它只接收事件。当图片具有焦点时，它不会生成按键事件。我该如何解决这个问题？

Answer 1

也许您的子窗口小部件（图片窗口小部件）也在等待keyPressEvent并且不会将它传播给父设备？

class ParentWidget(...):
    def keyPressEvent(self, event):
        print "pressed"

class ChildWidget(...):
    def keyPressEvent(self, event):
        if event.key() == QtCore.Qt.Key_<Some_key>:
            ...
        # Even if the pressed key is not <Some_key>, ParentWidget won't receive this event; 
        # for sending an event to the parent you must reject it:
        else:
            event.ignore()