I am trying to convert the Maya outliner to a QWidget. It works fine and shows up on screen as expected except the cleanup of it's outliner panel. I am tracking the panel of each instance through a unique object name and intend to delete them in the widget 's closeEvent. This is because I don't want the user's session to have multiple panels after the window/windows of anything using my custom widget is closed.
Despite everything I tried, each new panel that is created is never deleted, Maya just increments the name. I am really not sure what's the solution here?
Running this directly in script editor for my tests:
import typing as _t from maya import cmds as _cmds from PySide2 import QtCore as _QtCore from PySide2 import QtWidgets as _QtWidgets class MayaOutliner(_QtWidgets.QWidget): def __init__(self, parent=None): super(MayaOutliner, self).__init__(parent) # Delete on close flag self.setAttribute(_QtCore.Qt.WA_DeleteOnClose, True) self._outliner_panel: _t.Optional[str] = None self._main_layout = _QtWidgets.QVBoxLayout(self) self._main_layout.setObjectName(f"MayaOutlinerMainLayout_{id(self)}") self._setup_ui() def _setup_ui(self): self.setWindowTitle("Maya Outliner") self.resize(300, 400) self._outliner_panel = _cmds.outlinerPanel(parent=self._main_layout.objectName()) print(self._main_layout.objectName()) print(self._outliner_panel) def closeEvent(self, event): if self._outliner_panel: _cmds.deleteUI(self._outliner_panel) # This should have been false? print(_cmds.outlinerPanel(self._outliner_panel, exists=True)) super(MayaOutliner, self).closeEvent(event) window = MayaOutliner() window.show() 