def mouseMoveEvent(self, event): """ Protected method to handle mouse move events. @param event reference to the mouse move event (QMouseEvent) """ if event.buttons() == Qt.MouseButtons(Qt.LeftButton) and \ (event.pos() - self.__dragStartPos).manhattanLength() > \ QApplication.startDragDistance(): drag = QDrag(self) mimeData = QMimeData() index = self.tabAt(event.pos()) mimeData.setText(self.tabText(index)) mimeData.setData("action", "tab-reordering") mimeData.setData("tabbar-id", str(id(self))) mimeData.setData("source-index", QByteArray.number(self.tabAt(self.__dragStartPos))) mimeData.setData("tabwidget-id", str(id(self.parentWidget()))) drag.setMimeData(mimeData) if event.modifiers() == Qt.KeyboardModifiers(Qt.ShiftModifier): drag.exec_(Qt.DropActions(Qt.CopyAction)) elif event.modifiers() == Qt.KeyboardModifiers(Qt.NoModifier): drag.exec_(Qt.DropActions(Qt.MoveAction)) E4WheelTabBar.mouseMoveEvent(self, event)