Plugin_SN_Basis/ui/dockmanager.py

from qgis.PyQt.QtCore import Qt
from qgis.PyQt.QtWidgets import QDockWidget
from qgis.utils import iface

class DockManager:
    default_area = Qt.DockWidgetArea.RightDockWidgetArea

    @classmethod
    def show(cls, dock_widget, area=None):
        if area is None:
            area = cls.default_area

        # Alle vorhandenen Plugin-Docks schließen
        for widget in iface.mainWindow().findChildren(QDockWidget):
            if widget != dock_widget and widget.objectName().startswith("sn_dock_"):
                iface.removeDockWidget(widget)
                widget.deleteLater()

        # Neues Dock anzeigen
        iface.addDockWidget(area, dock_widget)
        dock_widget.show()