Is there a way to get a PyObjC proxy object for an Objective-C object, given only its id as an integer? Can it be done without an extension module?
In my case, I'm trying to get a Cocoa proxy object from the return value of wx.Frame.GetHandle (using wxMac with Cocoa).
The one solution I did find relies on ctypes to create an objc_object object from the id:
import ctypes, objc
_objc = ctypes.PyDLL(objc._objc.__file__)
# PyObject *PyObjCObject_New(id objc_object, int flags, int retain)
_objc.PyObjCObject_New.restype = ctypes.py_object
_objc.PyObjCObject_New.argtypes = [ctypes.c_void_p, ctypes.c_int, ctypes.c_int]
def objc_object(id):
return _objc.PyObjCObject_New(id, 0, 1)
An example of its use to print a wx.Frame:
import wx
class Frame(wx.Frame):
def __init__(self, title):
wx.Frame.__init__(self, None, title=title, pos=(150,150), size=(350,200))
m_print = wx.Button(self, label="Print")
m_print.Bind(wx.EVT_BUTTON, self.OnPrint)
def OnPrint(self, event):
topobj = objc_object(top.GetHandle())
topobj.print_(None)
app = wx.App()
top = Frame(title="ObjC Test")
top.Show()
app.MainLoop()
It's a little nasty since it uses ctypes. If there's a pyobjc API function I overlooked or some other neater way to do it, I'd surely be interested.
In PyObjC 2.5 you can use this:
import objc
objc.objc_object(ctypes_void_p=some_object_id)
There is no public API for doing this in earlier versions of PyObjC.