PyQt5通过拖动选项卡移动QDockWidget

将其发布为已接受答案的一点额外内容。该版本适用于 Qt5 和 Qt6，并且能够检测极端情况，例如拉出选项卡并将其放入同一组中或将浮动选项卡组与停靠窗口合并：from PySide6 import QtCore, QtWidgetsfrom PySide6.QtCore import Qtfrom typing import TypeVar, List, OptionalTDockWidget = TypeVar('TDockWidget', bound='DockWidget')class DockWidget(QtWidgets.QDockWidget):    def __init__(self: TDockWidget, title: str, parent: Optional[QtWidgets.QWidget] = None) -> None:        super(_DockWidget, self).__init__(title, parent)        self.setTitleBarWidget(QtWidgets.QWidget())        self.visibilityChanged.connect(self.on_visibility_changed)        self.dockLocationChanged.connect(self.on_dock_location_changed)    @QtCore.Slot(bool)    def on_visibility_changed(self: TDockWidget, is_visible: bool) -> None:        # this visibility monitor is really only needed to detect merges of        # tabbed, floating windows with existing docked windows        if not is_visible and isinstance(self.parent(), QtWidgets.QMainWindow):            main_window: QtWidgets.QMainWindow = self.parent()            all_dockwidgets: List[QtWidgets.QDockWidget] = main_window.findChildren(QtWidgets.QDockWidget)            for dockwidget in all_dockwidgets:                if hasattr(dockwidget, 'on_dock_location_changed'):                    dockwidget.on_dock_location_changed(main_window.dockWidgetArea(dockwidget), False)    @QtCore.Slot(Qt.DockWidgetArea)    def on_dock_location_changed(self: TDockWidget, area: Qt.DockWidgetArea, update_others: bool = True) -> None:        if not isinstance(self.parent(), QtWidgets.QMainWindow):            # mysterious parents call for a title            self.setTitleBarWidget(None)            return        main_window: QtWidgets.QMainWindow = self.parent()        if not main_window.tabifiedDockWidgets(self):            # if there's no siblings we ain't a tab!            self.setTitleBarWidget(None)            if not update_others:                # prevent infinite recursion                return            # force an update to all other docks that may now no longer be tabs            all_dockwidgets: List[QtWidgets.QDockWidget] = main_window.findChildren(QtWidgets.QDockWidget)            for dockwidget in all_dockwidgets:                if dockwidget != self and hasattr(dockwidget, 'on_dock_location_changed'):                    dockwidget.on_dock_location_changed(main_window.dockWidgetArea(dockwidget), False)            return        # at this point the dockwidget is either a resting tab or a tab        # that is being dragged and hasn't been dropped yet (siblings are updated post-drop)        # collect all siblings of this dockwidget...        tab_siblings: List[QtWidgets.QDockWidget] = main_window.tabifiedDockWidgets(self)        # and filter for non-floating siblings in the same area        tab_siblings = [x for x in tab_siblings if main_window.dockWidgetArea(x) == area and not x.isFloating()]        if tab_siblings:            if self.titleBarWidget() is not None:                # no changes needed, prevent infinite recursion                return            # show a title if we're not floating (this tab is settled),            # hide it otherwise (this tab just became floating but wasn't dropped)            self.setTitleBarWidget(QtWidgets.QWidget() if not self.isFloating() else None)            # in this case it's also a good idea to tell to reconsider their situation            # since Qt won't notify them separately            for sibling in tab_siblings:                if hasattr(sibling, 'on_dock_location_changed'):                    sibling.on_dock_location_changed(main_window.dockWidgetArea(sibling), True)        else:            self.setTitleBarWidget(None)if __name__ == "__main__":    app = QtWidgets.QApplication([])    main = QtWidgets.QMainWindow()    dock1 = DockWidget("Blue")    dock2 = DockWidget("Green")    dock3 = DockWidget("Red")    content1 = QtWidgets.QWidget()    content1.setStyleSheet("background-color:blue;")    content1.setMinimumSize(QtCore.QSize(50, 50))    content2 = QtWidgets.QWidget()    content2.setStyleSheet("background-color:green;")    content2.setMinimumSize(QtCore.QSize(50, 50))    content3 = QtWidgets.QWidget()    content3.setStyleSheet("background-color:red;")    content3.setMinimumSize(QtCore.QSize(50, 50))    dock1.setWidget(content1)    dock2.setWidget(content2)    dock3.setWidget(content3)    dock1.setAllowedAreas(Qt.AllDockWidgetAreas)    dock2.setAllowedAreas(Qt.AllDockWidgetAreas)    dock3.setAllowedAreas(Qt.AllDockWidgetAreas)    main.addDockWidget(Qt.LeftDockWidgetArea, dock1)    main.tabifyDockWidget(dock1, dock2)    main.addDockWidget(Qt.RightDockWidgetArea, dock3)    main.setDockOptions(main.GroupedDragging | main.AllowTabbedDocks | main.AllowNestedDocks)    main.setTabPosition(Qt.AllDockWidgetAreas, QtWidgets.QTabWidget.North)    main.resize(400, 200)    main.show()    app.exec_()

PyQt5通过拖动选项卡移动QDockWidget

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