UI widget will not resize its layouts using QUiLoader

[mark.henne]

I have a .ui file created with Qt Designer that adjust its layouts properly in Designer when the window is resized.  When I import that into Maya 2020 (or 2018) the window displays properly, but the layouts will not adjust when it is resized.  Attached is a very simple case that shows the problem, a QWidget (grid layout) with a child QVBoxLayout containing a QPushButton.

Thanks for any help.

Mark

test_ui.py

from PySide2 import QtCore
from PySide2 import QtWidgets
from PySide2 import QtUiTools
from shiboken2 import wrapInstance

import maya.OpenMayaUI as omui
import pymel.core as pm
import os

# .ui file is same folder as .py file
absFilePath = os.path.abspath(__file__)
path, filename = os.path.split(absFilePath)
uiFile = os.path.join(path, 'test_ui.ui')

def getMayaWindow():
    windowPtr = omui.MQtUtil.mainWindow()
    return wrapInstance(long(windowPtr), QtWidgets.QWidget)

class TestUI(QtWidgets.QDialog):
    
    def __init__(self, parent=getMayaWindow()):
        super(TestUI, self).__init__(parent)
        
        uiFileQt = QtCore.QFile(uiFile)
        uiFileQt.open(QtCore.QFile.ReadOnly)
        
        loader = QtUiTools.QUiLoader()
        self.ui = loader.load(uiFileQt, parentWidget=self)
        uiFileQt.close()

        self.show()

test_ui.ui

<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0">
 <class>Form</class>
 <widget class="QWidget" name="Form">
  <property name="geometry">
   <rect>
    <x>0</x>
    <y>0</y>
    <width>394</width>
    <height>222</height>
   </rect>
  </property>
  <property name="windowTitle">
   <string>Form</string>
  </property>
  <layout class="QGridLayout" name="gridLayout">
   <item row="0" column="0">
    <layout class="QVBoxLayout" name="verticalLayout">
     <item>
      <widget class="QPushButton" name="pushButton">
       <property name="sizePolicy">
        <sizepolicy hsizetype="Minimum" vsizetype="Minimum">
         <horstretch>0</horstretch>
         <verstretch>0</verstretch>
        </sizepolicy>
       </property>
       <property name="text">
        <string>PushButton</string>
       </property>
      </widget>
     </item>
    </layout>
   </item>
  </layout>
 </widget>
 <resources/>
 <connections/>
</ui>

[m.lokeshkumar2008 · Accepted solution]

class TestUI(QtWidgets.QDialog):
    
    def __init__(self, parent=getMayaWindow()):
        super(TestUI, self).__init__(parent)
        
        uiFileQt = QtCore.QFile(uiFile)
        uiFileQt.open(QtCore.QFile.ReadOnly)
        
        loader = QtUiTools.QUiLoader()
        self.ui = loader.load(uiFileQt, parentWidget=self)
        uiFileQt.close()
        
        # from here 
        self.ui.setParent(self)
        layout = QtWidgets.QVBoxLayout()
        layout.addWidget(self.ui)
        self.resize(self.ui.size())
        self.setLayout(layout)
        # Till here

        self.show()

Hi @mark.henne 

Try above code in between from here and till here comments, it might help you dude.

[mark.henne]

Sweet!  That works perfectly, @m.lokeshkumar2008 

Thanks a ton!

Mark