Pass a python dictionary as an object to Javascript

[pedro...@gmail.com]

I'm developing an application with pyqt.
So far, the UI is a web application inside a QwebView object.
In order to exchange information between front-end and back-end, I used to push a Python object in the DOM with:

self.web.page().mainFrame().addToJavaScriptWindowObject("obj",self.obj)

Given the generic object defined as follow:

class Obj(QtCore.QObject):
def __init__(self):
super(Obj,self).__init__()
self.data = {'foo' : 123, 'bar' : [1,2,3]}

@QtCore.pyqtSlot(result=QtCore.QVariant)
def GetData(self):
return QtCore.QVariant(self.data)

Then, when the page has been loaded, I can get the data of interest just calling

obj.GetData()

And what I get is a pure js object (It does not work if the dictionary contains a tuple..).

This approach worked perfectly, but since I need the well known performance of V8 plus some css specs not implemented yet in QWebView, I'm trying to migrate to CEF.

I changed the Object exposition as follow:

self.jsBindings.SetObject("obj", self.obj)

But when the GetData method is called by javascript, I got a warning stating that returning values is not supported.

The question is the following: Should I definitely change my approach, (in this case suggestion will be appreciated) or there is other method to return a dictionary from python to Js?

Thanks in advance.

[Czarek Tomczak]

All communication between js <> python is asynchronous. You can pass data to js/python by using callbacks mechanism. Examples are in the wxpython.py script.

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[Czarek Tomczak]

You can *return data to js/python by using callbacks mechanism.

[pedro...@gmail.com]

Ok Thanks, I finally succeeded looking at the example you mentioned.