[python-win32] Creating python com objects

[Roger Upole]

Alex Denham wrote:
> I've had a look at the example and i can't quite pick out what's being
> done differently other than pythoncom.WrapObject() is being called within
> a class and it's being called on the > class it's in?
> Or is it something to do with the arguments passed to wrap object?
>
> Thanks for the help.
> Alex

The class has to explicitely inherit from a policy class
(win32com.server.policy.DesignatedWrapPolicy), and
it has to have an __init__ method that calls _wrap_.
Also, an instance of the class is passed to WrapObject
rather than the class itself.

This is snipped from a working example:

class IDropTarget(win32com.server.policy.DesignatedWrapPolicy):
    _com_interfaces_=[pythoncom.IID_IDropTarget]
    _public_methods_=["DragEnter","DragOver","DragLeave","Drop"]

    def __init__(self):
       self._wrap_(self)

    def DragEnter(self, DataObject, KeyState, pt, Effect):
        print "DragEnter"
        print DataObject, KeyState, pt, Effect
    def DragOver(self, KeyState, pt, Effect):
        print "DragOver"
        print KeyState, pt, Effect
    def DragLeave(self):
        print "DragLeave"
    def Drop(self, DataObject, KeyState, pt, Effect):
        print "Drop"
        print DataObject, KeyState, pt, Effect

dt=IDropTarget()
IDT=pythoncom.WrapObject(dt, pythoncom.IID_IDropTarget, 
    pythoncom.IID_IDropTarget)

pythoncom.RegisterDragDrop(hwnd, IDT)

           Roger