python - 使用 PySide 清理 Maya 中的可停靠窗口

Question

我创建了一个能够停靠在 Maya 主用户界面中的工具，但我无法在它关闭后找到清理它的方法。问题是如果我创建该工具的多个实例然后将其拖动到位以停靠它，当我右键单击 Maya 的窗口时它们将全部显示出来。如何在工具关闭时正确清理这些内容？

我已经尝试过cmds.deleteUI、QObject.deleteLater()，充其量我只能清除工具的内容，但它仍然存在于Maya中。这是我目前所拥有的示例:

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

在深入研究 mayaMixin.py 之后，我设法找到了一个符合我所追求的行为的有效解决方案!这个想法是您需要深入了解 Maya 的主窗口并删除其中的所有实例。

下面的示例将在窗口关闭或创建新实例后彻底删除所有实例。不管它是停靠的还是 float 的，它似乎都可以正常工作。如果您不希望它在停靠时关闭时被删除，您也可以随时调整行为。我在代码中留下了很多评论，因为有很多“陷阱”。

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()

有了这个，它就不再污染 Maya 的环境了。希望对您有所帮助!