使用PySide清理Maya中的可停靠窗口

Question

我创建了一个可以停靠在Maya主ui中的工具，但是我想不出一种方法来关闭它。问题是，如果我创建该工具的多个实例，然后将其拖动到适当位置以将其停靠，则在我右键单击Maya的窗口时，它们将全部显示。工具关闭后，如何正确清理这些东西？

我已经尝试过了cmds.deleteUI，QObject.deleteLater()充其量我只能清除该工具的内容，但是它仍然存在于Maya中。这是到目前为止我所拥有的一个例子：

from shiboken import wrapInstance
from PySide import QtGui, QtCore
from maya import OpenMayaUI as OpenMayaUI
from maya.app.general.mayaMixin import MayaQWidgetDockableMixin

class Window(MayaQWidgetDockableMixin, QtGui.QWidget):
    def __init__(self, parent = None):
        super(self.__class__, self).__init__(parent = parent)
        mayaMainWindowPtr = OpenMayaUI.MQtUtil.mainWindow() 
        self.mayaMainWindow = wrapInstance(long(mayaMainWindowPtr), QtGui.QWidget) 
        self.setWindowFlags(QtCore.Qt.Window)

        if cmds.window('myTool', q = True, ex = True):
            cmds.deleteUI('myTool')

        self.setObjectName('myTool')

        self.setWindowTitle('My tool')
        self.resize(200, 200)

        self.myButton = QtGui.QPushButton('TEMP')

        self.mainLayout = QtGui.QVBoxLayout()
        self.mainLayout.addWidget(self.myButton)
        self.setLayout(self.mainLayout)

    def dockCloseEventTriggered(self):
        self.deleteLater()

    def run(self):
        self.show(dockable = True)

myWin = Window()
myWin.run()

Answer 1

在研究了mayaMixin.py之后，我设法获得了我所追求的行为的有效解决方案！这个想法是，您需要在Maya的主窗口中进行挖掘，然后删除其中的所有实例。

关闭窗口或创建新实例后，下面的示例将彻底删除所有实例。停靠或浮动都没关系，看起来工作正常。如果您不想在停靠时将其关闭，也可以随时对其进行调整。由于有很多“陷阱”，我在代码中留下了很多注释。

from shiboken import wrapInstance
from PySide import QtGui, QtCore
from maya import OpenMayaUI as OpenMayaUI
from maya.app.general.mayaMixin import MayaQWidgetDockableMixin
from maya.OpenMayaUI import MQtUtil

class MyWindow(MayaQWidgetDockableMixin, QtGui.QDialog):
    toolName = 'myToolWidget'

    def __init__(self, parent = None):
        # Delete any previous instances that is detected. Do this before parenting self to main window!
        self.deleteInstances()

        super(self.__class__, self).__init__(parent = parent)
        mayaMainWindowPtr = OpenMayaUI.MQtUtil.mainWindow() 
        self.mayaMainWindow = wrapInstance(long(mayaMainWindowPtr), QtGui.QMainWindow)
        self.setObjectName(self.__class__.toolName) # Make this unique enough if using it to clear previous instance!

        # Setup window's properties
        self.setWindowFlags(QtCore.Qt.Window)
        self.setWindowTitle('My tool')
        self.resize(200, 200)

        # Create a button and stuff it in a layout
        self.myButton = QtGui.QPushButton('My awesome button!!')
        self.mainLayout = QtGui.QVBoxLayout()
        self.mainLayout.addWidget(self.myButton)
        self.setLayout(self.mainLayout)

    # If it's floating or docked, this will run and delete it self when it closes.
    # You can choose not to delete it here so that you can still re-open it through the right-click menu, but do disable any callbacks/timers that will eat memory
    def dockCloseEventTriggered(self):
        self.deleteInstances()

    # Delete any instances of this class
    def deleteInstances(self):
        mayaMainWindowPtr = OpenMayaUI.MQtUtil.mainWindow() 
        mayaMainWindow = wrapInstance(long(mayaMainWindowPtr), QtGui.QMainWindow) # Important that it's QMainWindow, and not QWidget/QDialog

        # Go through main window's children to find any previous instances
        for obj in mayaMainWindow.children():
            if type( obj ) == maya.app.general.mayaMixin.MayaQDockWidget:
                #if obj.widget().__class__ == self.__class__: # Alternatively we can check with this, but it will fail if we re-evaluate the class
                if obj.widget().objectName() == self.__class__.toolName: # Compare object names
                    # If they share the same name then remove it
                    print 'Deleting instance {0}'.format(obj)
                    mayaMainWindow.removeDockWidget(obj) # This will remove from right-click menu, but won't actually delete it! ( still under mainWindow.children() )
                    # Delete it for good
                    obj.setParent(None)
                    obj.deleteLater()

    # Show window with docking ability
    def run(self):
        self.show(dockable = True)

myWin = MyWindow()
myWin.run()

这样，就不再污染Maya的环境了。希望能帮助到你！