1. Writing text in colors
I posted a problem with getDC:SaveDC() recently, and was advised to
avoid using graphics routines - like, I suspect, setText(). i trued
Win32Lib v0.57.6 but that doesn't help and is veerrryyyy sllooowwwww at
times or in some routines. wPuts() & wPrintf() are nasty - they leave
the rest of the text box with its old text, and use the system default
background. I can't seem to get around these - so please can someone
advise me what is a basically simple Windows task:
I want to write text, over & over again, into the same text box
controls, in different foreground OR background color without the
resources getting eaten up like they are when I use setWindowBkColor()
and setText().
Anyone with a working technique (should be easy!!!) i will buy a beer
when I see them!
Andy Drummond
2. Re: Writing text in colors
- Posted by tone.skoda at siol.net
May 27, 2002
----- Original Message -----
From: "Andy Drummond" <kestrelandy at xalt.co.uk>
> I want to write text, over & over again, into the same text box
> controls, in different foreground OR background color without the
> resources getting eaten up like they are when I use setWindowBkColor()
> and setText().
If you do this in C:
while 1 do
brush = CreateSolidBrush (RGB (rand ()%255, rand ()%255, rand ()%255)
SelectObject (hdc, brush)
Ellipse (hdc, 0, 0, 100, 100)
DeleteObject (brush)
end while
it won't work. After some time brush won't be created correct, it will be
allways
white (or something similar). That's what has happend to me several times
when I was programming in
C on win9x.
What I suggest is to pre-create all your brushes, pens on program startup
and save them in sequence. Delete them when program closes.
3. Re: Writing text in colors
> while 1 do
> brush = CreateSolidBrush (RGB (rand ()%255, rand ()%255, rand ()%255)
The problem is not with 'brush', but with 'object' .
... SelectObject() should be a *function*, so you can do:
while 1 do
brush = CreateSolidBrush (RGB (rand ()%255, rand ()%255, rand ()%255)
previous = SelectObject (hdc, brush) -- returns handle of previous brush
Ellipse (hdc, 0, 0, 100, 100) -- draw with new brush
previous = SelectObject(hdc, previous) -- restore previous brush
success = DeleteObject (brush)
if success = 0 then -- ( we have a problem ! )
< snip >
end while
< quote from win32.hlp, re: SelectObject() >
This function returns the previously selected object of the specified type. An
application should always replace a new
object with the original, default object after it has finished drawing with the
new object.
