[python-win32] COM Events

[Phil Hornby]

Great that seems to work - but I only get my parent object in this way:

agent = win32com.client.DispatchWithEvents ("Agent.Control.2", AgentEvents)

What if I then get other objects as properties of this object -
E.g.
"""
SomethingElse = agent.Another
"""

And this object/interface has events too...

In VB it would be something like:
"""
Dim WithEvents gCanApp As CANalyzer.Application
Dim WithEvents gCanMeasurement As CANalyzer.Measurement

Set gCanApp = New Application
Set gCanMeasurement = gCanApp.Measurement
"""

I have tried to do something similar like:
"""
CANalyzer = win32com.client.DispatchWithEvents('CANalyzer.Application',
CANalyzerEvents)
measurement = win32com.client.DispatchWithEvents('CANalyzer.Measurement',
MeasurementEvents)

measurement = CANalyzer.Measurement
"""

But I get a claim that I have an invalid class string - if I look at the
typelib that I am working with and it contains both interfaces - if I simply
have some code like:
"""
CANalyzer = win32com.client.DispatchWithEvents('CANalyzer.Application',
CANalyzerEvents)

measurement = CANalyzer.Measurement
"""

Then I get 'some' of the events from the CANalyzerEvents object - but the
ones I don't get are ones I can understand NOT getting - and I can use the
measurement interface in the way I would like EXCEPT I don't get any events.

Any ideas?

--
Phil 

> -----Original Message-----
> From: Tim Golden [mailto:tim.golden at viacom-outdoor.co.uk] 
> Sent: Friday, July 09, 2004 9:15 AM
> To: 'Phil Hornby'; Python Win32
> Subject: RE: [python-win32] COM Events
> 
> | In VB one way to write the code would be something like this:
> | 
> | """
> | Dim WithEvents gMyApp As XYZ.Application
> | 
> | Private Sub gMyApp_OnQuit()
> | 	'create application specific OnQuit event handler here..
> | End Sub
> | """
> | 
> | Where the event handler HAS to be called '<object>_<event>'
> | 
> | I can obviously make sure that I have a function with the 
> correct name 
> | - but HOW do I do the WithEvents bit!!??
> 
> You want to use DispatchWithEvents. You use it like the 
> normal Dispatch, but pass in additionally a class
> (*not* an instance) which contains methods corresponding to 
> the events you're interested in.
> 
> The following code fragment should illustrate what I mean 
> (from when I was playing around with Microsoft Agent):
> 
> <code>
> 
> class AgentEvents:
>   def OnActivateInput (self, character_id):
>     this_agent = active_agents.get (character_id)
>     if this_agent: this_agent.on_activate_input ()
> 
>   def OnActiveClientChange (self, character_id, active):
>     this_agent = active_agents.get (character_id)
>     if this_agent: this_agent.on_activate_client_change (active)
> 
>   def OnAgentPropertyChange (self):
>     pass
> 
> agent = win32com.client.DispatchWithEvents 
> ("Agent.Control.2", AgentEvents)
> 
> </code>
> 
> TJG
> 
> 
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