全屏模式下的QVideoWidget不再响应热键或鼠标滚轮

Question

在PySide2中使用QVideoWidget（尽管python部分可能并不重要）。我用QShortcut设置了热键，一切都很好。当我按“F”键进入全屏模式时，它也能工作，但我不能离开。我的热键或鼠标事件处理程序都无法工作。我最终陷入了全屏模式

有没有办法让它即使在全屏模式下也能响应？我用错误的方法创建热键了吗

此示例演示了以下问题：

class MainWindow(QWidget):
    def __init__(self):
        super().__init__()
        self._fullscreen = False
        self.movie_display = QVideoWidget(self)
        self.movie_handler = QMediaPlayer()
        self.movie_handler.setVideoOutput(self.movie_display)
        layout = QVBoxLayout()
        layout.addWidget(self.movie_display)
        self.setLayout(layout)
        QShortcut(QKeySequence(QtConsts.Key_F), self, self.toggle_fullscreen)
        s = 'test.webm'
        s = os.path.join(os.path.dirname(__file__), s)
        local = QUrl.fromLocalFile(s)
        media = QMediaContent(local)
        self.movie_handler.setMedia(media)
        self.movie_handler.play()

    def toggle_fullscreen(self):
        self._fullscreen = not self._fullscreen
        self.movie_display.setFullScreen(self._fullscreen)

Answer 1

问题是在窗口中设置了快捷方式，但在QVideoWidget中设置了全屏时，将创建两个窗口：原始窗口和QVideoWidget全屏的窗口。一种可能的解决方案是在QVideoWidget中设置QShortcut或确定QShortcut的上下文为Qt::ApplicationShortcut：

import os

from PyQt5 import QtCore, QtGui, QtWidgets, QtMultimedia, QtMultimediaWidgets

CURRENT_DIR = os.path.dirname(os.path.realpath(__file__))


class MainWindow(QtWidgets.QWidget):
    def __init__(self):
        super().__init__()
        self._fullscreen = False
        self.movie_display = QtMultimediaWidgets.QVideoWidget()

        self.movie_handler = QtMultimedia.QMediaPlayer(
            self, QtMultimedia.QMediaPlayer.VideoSurface
        )
        self.movie_handler.setVideoOutput(self.movie_display)

        layout = QtWidgets.QVBoxLayout(self)
        layout.addWidget(self.movie_display)
        QtWidgets.QShortcut(
            QtGui.QKeySequence(QtCore.Qt.Key_F),
            self.movie_display,
            self.toggle_fullscreen,
        )
        # or
        """QtWidgets.QShortcut(
            QtGui.QKeySequence(QtCore.Qt.Key_F),
            self,
            self.toggle_fullscreen,
            context=QtCore.Qt.ApplicationShortcut
        )"""

        file = os.path.join(os.path.dirname(os.path.realpath(__file__)), "test.webm")
        media = QtMultimedia.QMediaContent(QtCore.QUrl.fromLocalFile(file))
        self.movie_handler.setMedia(media)
        self.movie_handler.play()

    def toggle_fullscreen(self):
        self._fullscreen = not self._fullscreen
        self.movie_display.setFullScreen(self._fullscreen)


if __name__ == "__main__":
    import sys

    app = QtWidgets.QApplication(sys.argv)
    w = MainWindow()
    w.show()
    sys.exit(app.exec_())