Pyside: Qwidget expose in QML with qmlRegisterType

[ultimodruido]

Hello everybody!
i was trying to use the qmlRegisterType function in order to see how does t work.
And as always, I'm such a good programmer that it didn't work :)

here is the main python file:

@#!/usr/bin/python

-- coding: utf-8 --

import sys
from PySide import QtCore
from PySide import QtGui
from PySide import QtDeclarative
#from QtMobility import Location

class QMLButton(QtDeclarative.QDeclarativeItem):
def init(self, parent = 0):
super(QMLButton, self).init()
self.my_button = QtGui.QPushButton("Settings")
self.my_button.clicked.connect(self.my_btn_clicked)
self.my_proxy = QtGui.QGraphicsScene().addWidget(self.my_button)
#print dir (self.my_proxy)
#self.my_proxy.show()

def my_btn_clicked(self):
    print "done"

class MainWindow(QtDeclarative.QDeclarativeView):

def __init__(self, parent=None):
    super(MainWindow, self).__init__(parent)
    self.setWindowTitle("test QML")

    self.register = QtDeclarative.qmlRegisterType(QMLButton, "MyPython", 1, 0, "MyButton")

    # Renders 'view.qml'
    self.setSource(QtCore.QUrl.fromLocalFile('qml/maemodrive/MD_qml.qml'))
    # QML resizes to main window
    self.setResizeMode(QtDeclarative.QDeclarativeView.SizeRootObjectToView)

if name == 'main':
# Create the Qt Application
app = QtGui.QApplication(sys.argv)
# Create and show the main window
window = MainWindow()
window.showMaximized()
# Run the main Qt loop
sys.exit(app.exec_())@

and here the qml file:
@import QtQuick 1.0
import MyPython 1.0

Rectangle {

//anchors.fill: parent
color: "lightblue"
width: 800
height: 480

MyButton {
    //show: true
    id: forse
    height: 300
    width: 150
    x:100
    y: 100
    anchors.centerIn: parent
}

Image {
    id: info
    source: "icons/ui/btn_min.png"
    anchors.bottom: parent.bottom
    anchors.left: parent.left
}

}@

The program runs it shows the qml (light blue rectangle and the image in the lower left corner) but there is no button :)

I did discover that, if I add the show() line to the QMLbutton class:
@class QMLButton(QtDeclarative.QDeclarativeItem):
def init(self, parent = 0):
super(QMLButton, self).init()
self.my_button = QtGui.QPushButton("Settings")
self.my_button.clicked.connect(self.my_btn_clicked)
self.my_proxy = QtGui.QGraphicsScene().addWidget(self.my_button)
self.my_proxy.show()@

I get this error:
@ File "./maemodriveQML01.py", line 17, in init
self.my_proxy.show()
RuntimeError: Internal C++ object (PySide.QtGui.QGraphicsProxyWidget) already deleted.@
So it seems tha I did loose the reference in python and the element has been deleted? But the instance should be generated from the qml file... how do I save the instance? I tried giving an Id the MyButton but no success.
Thank you very much for the help
Nicola

PS: I was copying from this "site":http://kunalmaemo.blogspot.com/2011/07/how-to-display-qwidget-into-qml.html

[renato.filho]

I think this a error on pyside:

try change your code for something like:

@
class QMLButton(QtDeclarative.QDeclarativeItem):
def init(self, parent = 0):
super(QMLButton, self).init()
self.my_button = QtGui.QPushButton("Settings")
self.my_button.clicked.connect(self.my_btn_clicked)
scene = QtGui.QGraphicsScene()
self.my_proxy = scene.addWidget(self.my_button)
self.my_proxy.show()
@

This is related with pyside bug: http://bugs.pyside.org/show_bug.cgi?id=915

[ultimodruido]

Hi Renato!
Thanks for the tip! It did solve the issue with the RuntimeError, but unfortunately I still don't see the button in the QML scene :(
If I discover how to make it work I will post it...
ciao
nic