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Creating a part without an underlying form?

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Richard Sargent

Creating a part without an underlying form?

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It seems to me this question has been asked before, but if it has, I couldn't find the answer.

I would like to create a composite part which doesn't have its own Form (as that blocks anything it overlays). Think of an empty picture frame: you can hold it front of anything and see through it. An acceptable alternative would be the ability to subclass a Form such that it is transparent not only to parts beneath it but to window events, mouse clicks, and so on.

For those who are wondering, I am trying to mimic something found in the VisualWorks version of our product. Rewriting that product's UI is not impossible, but definitely undesirable.

Thanks,
Richard

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Re: Creating a part without an underlying form?

Hi Richard,

I know this issue. It seems as if every UI built with the editor tools has AbtForms "between" each part layer.
Whenever I work with openGL, DrawingAreas and such I need to use m own subclass of Abt/CwForm that won't redraw it's background on a refresh. Those default Forms are the reason why all the drawing code within VAST flicker.

I can't recall if a CwForm is actually really needed but the easiest way indeed is subclassing all FormClasses in all layers and remove the behavior you do not need/like.

Maybe you can also check for a pure Cw-Layer implementation. I think forms are not always used there.
But I might be wrong with this one.

Sebastian

Am 18.07.2014 14:38, schrieb Richard Sargent:

It seems to me this question has been asked before, but if it has, I couldn't find the answer.

I would like to create a composite part which doesn't have its own Form (as that blocks anything it overlays). Think of an empty picture frame: you can hold it front of anything and see through it. An acceptable alternative would be the ability to subclass a Form such that it is transparent not only to parts beneath it but to window events, mouse clicks, and so on.

For those who are wondering, I am trying to mimic something found in the VisualWorks version of our product. Rewriting that product's UI is not impossible, but definitely undesirable.

Thanks,
Richard

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Richard Sargent

Re: Creating a part without an underlying form?

Administrator

On Friday, July 18, 2014 9:45:27 PM UTC-7, Sebastian Heidbrink wrote:

I know this issue. It seems as if every UI built with the editor tools has AbtForms "between" each part layer.
Whenever I work with openGL, DrawingAreas and such I need to use m own subclass of Abt/CwForm that won't redraw it's background on a refresh. Those default Forms are the reason why all the drawing code within VAST flicker.

Hi Sebastian,

Do you have some example code you would be willing to share?

Thanks,
Richard