Thanks for reading.
I want to drag and drop the button out side of the window, however, it is not working.
I think QmimeData problem, however, I don’t know how to.
Anyone who knows about it?
Thanks.

class DragButton(QPushButton):
def mouseMoveEvent(self, e):
if e.buttons() == Qt.LeftButton:
drag = QDrag(self)
mime = QMimeData()
drag.setMimeData(mime)

        pixmap = QPixmap(self.size())
        self.render(pixmap)
        drag.setPixmap(pixmap)

        drag.setHotSpot(e.pos())
        drag.exec(Qt.MoveAction)

def mousePressEvent(self, e):
    if e.button() == Qt.LeftButton:
        self.original_parent = self.parent()
    super().mousePressEvent(e)

class MainWindow(QMainWindow):
def init(self, title, manager, button_text):
super().init()
self.setWindowTitle(title)
self.manager = manager

    layout = QVBoxLayout()
    button = DragButton(button_text)
    layout.addWidget(button)

    container = QWidget()
    container.setLayout(layout)
    self.setCentralWidget(container)

def closeEvent(self, event):
    self.manager.window_closed(self)
    super().closeEvent(event)