Simple way to Docking Qt widgets to Maya 2017+

Simple_MayaDockingClass.py

'''
Template class for docking a Qt widget to maya 2017+.
Author: Lior ben horin
12-1-2017
'''

import weakref

import maya.cmds as cmds
import maya.OpenMayaUI as omui
from shiboken2 import wrapInstance

from Qt import QtGui, QtWidgets, QtCore # https://github.com/mottosso/Qt.py by Marcus Ottosson 


def dock_window(dialog_class):
    try:
        cmds.deleteUI(dialog_class.CONTROL_NAME)
        logger.info('removed workspace {}'.format(dialog_class.CONTROL_NAME))

    except:
        pass

    # building the workspace control with maya.cmds
    main_control = cmds.workspaceControl(dialog_class.CONTROL_NAME, ttc=["AttributeEditor", -1],iw=300, mw=True, wp='preferred', label = dialog_class.DOCK_LABEL_NAME)
    
    # now lets get a C++ pointer to it using OpenMaya
    control_widget = omui.MQtUtil.findControl(dialog_class.CONTROL_NAME)
    # conver the C++ pointer to Qt object we can use
    control_wrap = wrapInstance(long(control_widget), QtWidgets.QWidget)
    
    # control_wrap is the widget of the docking window and now we can start working with it:
    control_wrap.setAttribute(QtCore.Qt.WA_DeleteOnClose)
    win = dialog_class(control_wrap)
    
    # after maya is ready we should restore the window since it may not be visible
    cmds.evalDeferred(lambda *args: cmds.workspaceControl(main_control, e=True, rs=True))

    # will return the class of the dock content.
    return win.run()


class MyDockingUI(QtWidgets.QWidget):

    instances = list()
    CONTROL_NAME = 'my_workspcae_control'
    DOCK_LABEL_NAME = 'my workspcae control'

    def __init__(self, parent=None):
        super(MyDockingUI, self).__init__(parent)

        # let's keep track of our docks so we only have one at a time.    
        MyDockingUI.delete_instances()
        self.__class__.instances.append(weakref.proxy(self))

        self.window_name = self.CONTROL_NAME
        self.ui = parent
        self.main_layout = parent.layout()
        self.main_layout.setContentsMargins(2, 2, 2, 2)

        # here we can start coding our UI
        self.my_label = QtWidgets.QLabel('hello world!')
        self.main_layout.addWidget(self.my_label)    

    @staticmethod
    def delete_instances():
        for ins in MyDockingUI.instances:
            logger.info('Delete {}'.format(ins))
            try:
                ins.setParent(None)
                ins.deleteLater()
            except:
                # ignore the fact that the actual parent has already been deleted by Maya...
                pass

            MyDockingUI.instances.remove(ins)
            del ins

    def run(self):
        return self

# this is where we call the window
my_dock = dock_window(MyDockingUI)

Hi all this is a good stuff but I have a problem. The dock windows can show only one time , if I run the code it delete instance and cannot pop up again.
Any solutions please?
Thanks

where do you set self.setSizeGripEnabled(False)? This new way won't let me set those attributes to my window anymore

I test this version. And which more better. Right now I need to configure my old window setup.
Thank you for this.

Hi,
Thanks for your script !!
Can you help me modify the code to load a Ui file rather than create the interface directly in this code?
Or maybe I can convert my Ui to Py and load it ?

thank you,

Hi,
Thanks for your script !!
Can you help me modify the code to load a Ui file rather than create the interface directly in this code?
Or maybe I can convert my Ui to Py and load it ?

thank you,

It should be straightforward in python, see loadUi
You could also take a look at the previous version of this script. It loaded and parsed .ui files here

Hi,
Thanks for your script !!
Can you help me modify the code to load a Ui file rather than create the interface directly in this code?
Or maybe I can convert my Ui to Py and load it ?

thank you,

If you want to convert *.ui file. You need to use pyuic in console/terminal.

There's 2 type of python bind as I remembered, PyQt and PySide

Maya used PySide2. So in your folder that contain *.ui file right click and use "cmd here"
or..
Open cmd/terminal change directory to your folder then type some command
or...
You can type cmd in folder direction, press enter then type:

#for PyQt5, use:
pyuic5 -x yourUiFilename.ui -o yourUiFileConvertName.py

#if you want to use PySide2:
pyside2-uic -x yourUiFilename.ui -o yourUiFileConvertName.py

So if there's no error in your command you will see *.py extension file inside your folder.

If you don't want to confused yourself to pure PyQt/PySide ui build and just want to build from existing *.ui file and focus on tool development try this https://github.com/prsfx/MayaDockTool

I believed this method way more faster to develope tool. Build HUGE interface is pain in the ass.
If you still confused, I don't know what you want to do with your tool.

Good luck.