| Re: Which event model? [message #49509] |
Mon, 31 July 2006 17:35 |
Robbie
Messages: 165
Registered: February 2006
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Senior Member |
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It's amazing how good decisions in early development can make a huge
difference later on.
I suspected that the aim of the event model was to decouple iTools from
xmanager, but I didn't know what further ambitions ITTVIS might have.
It's quite impressive how we can now export
IDLitWindow/IDLitDirectWindow/IDLgrWindow using DirectX or Java (as of
IDL 6.3). Now all I have to do is think of some fancy applications to
throw at it.
Robbie
http://barnett.id.au/idl/
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| Re: Which event model? [message #49510 is a reply to message #49509] |
Mon, 31 July 2006 17:00  |
codepod
Messages: 19
Registered: March 2006
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Junior Member |
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Robbie,
The event callbacks on IDLitWindow are intended to support events that
are not tied to the IDL Widget system. A good example is what is seen
with the IDL Export Bridges exposed in IDL 6.3.
For the Export Bridge technology, events are dispatched to the
IDLitWindow from ActiveX/Java. An IDL Widget deployment will also
support the IDLitWindow event model, so you could have the same
underlying graphics code operate in IDL Widgets as well as in a
Java/ActiveX deployment.
So if you ever plan to move functionality to a different environment
besides IDL Widget deployments, this is the event model to use. For
most users, this isn't needed and you can stick to plain old Widget
programming.
Of historical note: the IDLitWindow event model was put in place in
IDL 6.0 to support GUI decoupling with the iTools and future component
model architectures. The goal being you could write iTool functionality
and rapidly deploy it to a COM/Java environment using the Export Bridge
technology. I've seen this in operation and it works fairly well.
I hope that helps.
Cheers! -CP
Robbie wrote:
> Hello everyone,
>
> I've begun to notice that the event model attached to IDLitWindow is
> being used in more places. For example, the same event model is
> implemented in the IDL export bridge so that events from Java and
> DirectX will issue callbacks in IDL. This trend seems to suggest that I
> should favour IDLitWindow's event notification in preference to
> xmanager.
>
> Any thoughts?
>
> Robbie
>
> http://barnett.id.au/idl/
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