MUI Custom Classes and Clipping

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Hi everyone

I'm having a bit of difficulty with my custom class that I have created in MUI.

I get the MADF_DRAWUPDATE notification from MUI to render my class, and the actual rendering is working fine. But whenever I add the Mui_AddClipping() and Mui_RemoveClipping() before and after drawing to restrict the drawing to the class area, it causes a crash.

I haven't managed to find much documentation on these MUI commands. I do see in the Amiga autodocs that it is illegal to clip a window between a BeginRefresh()/EndRefresh() pair and wondered if this is what is happening?

Any information on this would be greatly appreciated!

Thanks,
   Chris

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Discovered that Mui_AddClipping() seems to work on OS3 and MorphOS, only get a crash on OS4. I am starting to think it is either a bug in the OS4 port of MUI, or else a bug in the WinUAE PPC emulation.

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I figured it out. The ECX muimaster module was out of date, and wasn't compatible with the new MUI 4 on OS4. I recompiled it from the XML file in the MUI SDK and that did the trick.