QMdiArea subwindow scrolls not working in TabbedView

babablacksheep

I have setup simple example using PyQt designer.See below. I have mdiarea in in which i am adding a form as subwindow. I made subwindow form a bit lengthier than mainwindow to see if scroll-bar appears for child sub-window.

PROBLEM:
If i set mdiarea to setViewMode(QtGui.QMdiArea.TabbedView) scrollbars stop working and disappear. Howeevr If i dont use TabbedView, scrollbars work fine. Can anyone tell me whats wrong ? I need TabbedView of mdiarea with working scrollbars.

Python Sample Code:
Comment the line self.mdiArea.setViewMode to see example working.

_
I am using Python 2.7,PyQT 4.8.4/Pyside 1.2.1 on win7.

@import sys
from PyQt4 import QtCore, QtGui

class Ui_MainWindow(object):
def setupUi(self, MainWindow):
MainWindow.setObjectName( "MainWindow" )
MainWindow.resize(500, 400)
self.centralwidget = QtGui.QWidget(MainWindow)
self.centralwidget.setObjectName( "centralwidget" )
self.verticalLayout = QtGui.QVBoxLayout(self.centralwidget)
self.verticalLayout.setObjectName( "verticalLayout" )
self.mdiArea = QtGui.QMdiArea(self.centralwidget)

    self.mdiArea.setVerticalScrollBarPolicy(QtCore.Qt.ScrollBarAsNeeded)
    self.mdiArea.setHorizontalScrollBarPolicy(QtCore.Qt.ScrollBarAsNeeded)

    self.mdiArea.setActivationOrder(QtGui.QMdiArea.CreationOrder)
    self.mdiArea.setViewMode(QtGui.QMdiArea.TabbedView)
    self.mdiArea.setTabsClosable(True)
    self.mdiArea.setTabsMovable(True)
    self.mdiArea.setObjectName( "mdiArea" )
    self.verticalLayout.addWidget(self.mdiArea)
    MainWindow.setCentralWidget(self.centralwidget)
    self.menubar = QtGui.QMenuBar(MainWindow)
    self.menubar.setGeometry(QtCore.QRect(0, 0, 508, 21))
    self.menubar.setObjectName( "menubar" )
    self.menuAdd = QtGui.QMenu(self.menubar)
    self.menuAdd.setObjectName( "menuAdd" )
    MainWindow.setMenuBar(self.menubar)
    self.statusbar = QtGui.QStatusBar(MainWindow)
    self.statusbar.setObjectName( "statusbar" )
    MainWindow.setStatusBar(self.statusbar)
    self.menubar.addAction(self.menuAdd.menuAction())

    self.retranslateUi(MainWindow)
    QtCore.QMetaObject.connectSlotsByName(MainWindow)

def retranslateUi(self, MainWindow):
    MainWindow.setWindowTitle(   "MainWindow" )
    self.menuAdd.setTitle( "&Add Form" )

class Ui_Form(object):
def setupUi(self, Form):
Form.setObjectName( ("Form"))
Form.resize(400, 800)
self.gridLayout = QtGui.QGridLayout(Form)
self.gridLayout.setObjectName( ("gridLayout"))
self.plainTextEdit = QtGui.QPlainTextEdit(Form)
self.plainTextEdit.setMinimumSize(QtCore.QSize(0, 731))
self.plainTextEdit.setObjectName( ("plainTextEdit"))
self.gridLayout.addWidget(self.plainTextEdit, 0, 0, 1, 1)
self.buttonBox = QtGui.QDialogButtonBox(Form)
self.buttonBox.setStandardButtons(QtGui.QDialogButtonBox.Cancel|QtGui.QDialogButtonBox.Ok)
self.buttonBox.setObjectName( ("buttonBox"))
self.gridLayout.addWidget(self.buttonBox, 1, 0, 1, 1)

    self.retranslateUi(Form)
    QtCore.QMetaObject.connectSlotsByName(Form)

def retranslateUi(self, Form):
    Form.setWindowTitle( "Lengthy subwindow" )
    self.plainTextEdit.setPlainText( "Lengthy Form" )

class MyApp(QtGui.QMainWindow):
def init(self, parent=None):
super(MyApp, self).init(parent)
self.ui = Ui_MainWindow()
self.ui.setupUi(self)

def Add_Subwindow(self):
    widget = QtGui.QWidget()
    self.subwin_abq = Ui_Form()
    self.subwin_abq.setupUi(widget)
    self.subwindow = QtGui.QMdiSubWindow(self.ui.mdiArea) 
    widget.setParent(self.subwindow)
    self.subwindow.setWidget(widget)  
    self.subwindow.setWindowTitle("testing")
    self.ui.mdiArea.addSubWindow(self.subwindow)
    widget.show()
    self.subwindow.show()
    self.subwindow.widget().show()

if name == "main":
app = QtGui.QApplication(sys.argv)
window = MyApp()
window.show()
window.Add_Subwindow()
sys.exit(app.exec_())@