PySide and Qt Properties: Connecting signals from Python to QML -

i trying run simple pyside appliccation design made in qml. call function in qml python in separated thread.

i have following qml view:

import qt 4.7  rectangle {     visible: true      width: 100; height: 100     color: "lightgrey"      text {         id: datestr         objectname: "datestr"         x: 10         y: 10         text: "init text"         font.pixelsize: 12          function updatedata(text) {             datestr.text = qstr(text)             console.log("you said: " + text)         }      }  } 

here application:

some imports....

#!/usr/bin/python  import sys import time  pyside import qtdeclarative, qtcore  pyside.qtgui import qapplication pyside.qtdeclarative import qdeclarativeview 

the qthread worker....

#worker thread class worker(qtcore.qthread):      updateprogress = qtcore.signal(int)      def __init__(self, child):         qtcore.qthread.__init__(self)         self.child = child      def run(self):         while true:             time.sleep(5)             #call function updatedata - not work             self.child.updatedata("other string ") 

and here view assembled:

if __name__ == '__main__':      # create qt application     app = qapplication(sys.argv)     # create view     view = qdeclarativeview()     # connect qml     view.setsource(qtcore.qurl.fromlocalfile('main_ui.qml'))     # show ui     view.show()      #get root object , find child datestr     root = view.rootobject()     child = root.findchild(qtcore.qobject, "datestr")      #call function updatedata - works     child.updatedata("string")      worker = worker(child)     worker.start()      sys.exit(app.exec_()) 

if qml function updatedata(text) called qthread, datestr.text not set console message produced. if qml function called within main function, update of datestr.text works normally.

question

how proper way call qml function qtthread?

links

pyside tutorial: connecting signals python qml

i found answer in other thread:

stackoverflow: pyside settext() not updating qlabel

in case widget not repainted , therefore needed force application repaint it. used code (see pyside docs: qapplication):

def updateallwidgets():     widget in qapplication.allwidgets():         widget.update() 

this function can called example timer:

timer = qtcore.qtimer() timer.start(1000) timer.timeout.connect(updateallwidgets) 

see also: pyside: calling python function qml , vice versa