Re: [jazzplusplus-devel] some notes about flickering background in jazzpp

[Dave F. <dav...@co...>]

On Sunday 11 April 2004 02:42 am, joakim verona wrote:
> - implementing the "erase" handler and also implementing "double buffering"
> seems achieve rock-solid redraw, but my implementation currently has
> other problems:
> a) you need a background bitmap to draw in, and I havent figured out how
> to know the right size for it yet
> b) events doesnt get drawn for some reason

Assuming the space needed is larger than the window ever gets, can you just 
draw the whole thing in your memory dc and then copy only the part that you 
need for the window when you need it?  Also, how does this affect selection?  
I noticed some serious bugs in selection, and haven't managed to track them 
down (it was hitting these bugs at the end of my last jazz timeslice that 
stopped me from finishing the selection interface in the Project class).

> Anyway, I think I'm on the right track, and we can at some future time
> have beautiful screen
> updates like Rosegarden :-P

Heh, you mean beautiful the RoseGarden's are beautiful, but you expect them to 
actually work, too, right?  ;)  (I spend more time swearing than composing 
when I use RoseGarden...)

Dave

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