Window pens question

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trixie
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Window pens question

I have a custom gadget that I add to a window (created by the Window Class). The gadget needs to erase its background before it gets GM_RENDERed. It appears to me (based on experimenting) that the window class uses FORESHINEPEN (rather than BACKGROUNDPEN) for the background.

Is it really the case? Can I rely on this pen being used across various themes? I mean, will FORESHINEPEN (whatever colour it represents in a particular theme) always be used for the background?

thomas
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Re: Window pens question

Actually you shouldn't care about the background pen. Just use EraseRect.

To get the proper background you should save the GA_BackFill attribute in your OM_SET method and in GM_RENDER use InstallLayerHook to install that backfill hook. Don't forget to set it back to the previous value before GM_RENDER returns.

trixie
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Re: Window pens question

@thomas

Thank you, works like a charm!

SAM440ep-flex @ 667MHz / 1GB RAM / Radeon 9250 / AmigaOS 4.1 Final Edition Author of WordNet for OS4
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