pyqt4 - Python PyQt/PySide QMdiArea subwindows scroll not working in TabbedView -

i have setup simple example using pyqt designer.see below. have mdiarea in in adding form subwindow. made form bit lengthier mainwindow see if scroll-bar appears child sub-window.

problem: if set mdiarea setviewmode(qtgui.qmdiarea.tabbedview) scrollbars stop working , disappear. howeevr if dont use tabbedview, scrollbars work fine. can tell me whats wrong ? need tabbedview of mdiarea working scrollbars.

i using python 2.7,pyqt 4.8.4/pyside 1.2.1 on win7.

python sample code: comment line self.mdiarea.setviewmode see example working.

import sys 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_()) 

just wanted code in op - looking simple mdi example in pyqt, , yours helped lot! don't have answer, can note far: have python 2.7,pyqt 4.8.3, , commenting settabsclosable , settabsmovable line, example show this:

i downloaded designer-qt4 , looked there qmdiarea, there seems nothing called tabbedview. found this:

qtwidgets 5.0: qmdiarea class | documentation | qt project

enum viewmode { subwindowview, tabbedview }
enum describes view mode of area; i.e. how sub-windows displayed.
subwindowview 0 display sub-windows window frames (default).
tabbedview 1 display sub-windows tabs in tab bar.
documentmode: property holds whether tab bar set document mode in tabbed view mode.

the way read this: either display subwindows in mdi fashion (so can larger window, scrollbars) or subwindows become tabs in tabbed view - , there size of subwindow doesn't matter anymore, expands take available tabbed area. also, in code, self.ui.mdiarea.documentmode() returns false in both cases.

i added snippet @ end of myapp.add_subwindow():

    sp = self.subwindow.sizepolicy()     print sp.__dict__     #print dir(sp)     attr in dir(sp):       try:         print "obj.%s = %s" % (attr, getattr(sp, attr))       except: pass 

this dumps interesting data (i'm not sure if object properties, though):

obj.buttonbox = 2 obj.checkbox = 4 obj.combobox = 8 obj.controltype = <class 'pyqt4.qtgui.controltype'> obj.controltypes = <class 'pyqt4.qtgui.controltypes'> obj.defaulttype = 1 obj.expandflag = 2 obj.expanding = 7 obj.fixed = 0 obj.frame = 16 ... 

... these don't change in running tabbed vs. mdi mode.

so, maybe intended behavior? if so, mean you'd have find "lone" tab display widget; add programmatically several qmdiareas; hide of them default 1 @ start; , bind click on respective tabs show "their" qmdiarea , hide others (but needless say, haven't tested it).