🚀 go-pugleaf

In article <1992Jul21.172030.4078@vela.acs.oakland.edu> mclellan@vela.acs.oakland.edu (Candy M. McLellan) writes:
>
>Paul,
>
[ stuff deleted ]
>	How can I keep a Bitmap Selected into memory with an
>	Owner-Draw ListBox?
>
>	The ODA messages seem to work on a item by item basis
>	with no sequence (asynchronous) with lp->hDC having
>	no beginning.
>
>	IOW, I want to select a bitmap into memory for the first
>	item in a re-paint and then not select again for further
>	items (this speeds things up considerable when doing
>	one's own custom controls).
>
>	However, as I said, the Owner-Draw does not seem to have
>	a synchrous state where one can tell when the hDC is
>	first being claimed for any given # of item re-paints.
>
>	I thought of subclassing ListBox but I don't see how
>	one could intercept WM_PAINT for the hDC I'm referring to
>
>	Any suggestions are greatly appreciated.
>
Sorry, I don't understand what you are asking.  Surely the
hDC in the WM_DRAWITEM's DRAWITEMSTRUCT is a screen DC and
not a memory DC?  You can't select a bitmap into a screen DC.

Are you trying to mimimize the redrawing required for each
WM_DRAWITEM message?  If so, could you not just change the
state according to itemAction?  I.e., if you get itemAction
== IDA_FOCUS, maybe yoy could just XOR your caret on or off.

Maybe we should take this offline, feel free to send e-mail.

cheers - Paul.