[futurebasic] Re: [FB] EDIT FIELD flashes in a colored window

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From: Jay Reeve <jayreeve@...>
Date: Sun, 18 May 2003 09:53:00 -0500
>  > I still don't believe the problem is in the runtime. Below is a brief
>>  demo. Do you see any flash when you run it? I have a moderately fast
>>  machine, so that may be masking it, but it looks smooth as silk when
>>  I run it here. Check on the sequence of building window, setting
>>  colors, creating EF. Sure it's great to have a hackable runtime, but
>>  if it ain't broke... :-)
>>
>>  e-e
>>  =J= a  y
>>   "
>>
>>  dim as rgbcolor backRGB,foreRGB
>>  dim r as rect
>>  dim i
>>  foreRGB.red   = &FFFF 'Red text
>>  //backRGB.green = &FFFF 'unREM for Green background
>>
>>  setrect(r, 0, 0, 500, 200)
>>  window 1, "EF on colored BG", @r
>>  RGBbackColor(backRGB)
>>  cls
>>  rgbforecolor(foreRGB)
>>  for i = 1 to 5
>>  edit field -1, "Watch for flashŠ", (50,50)-(450, 100), _statnoframed,
>>  _centerjust
>>  setselect 0, 99
>>  edit text #1,_sysfont,40,_boldbit%¬
>>  //,,foreRGB, backRGB 'unREM for appearance runtime
>>  delay 1000
>>  edit field close 1
>>  delay 1000
>>  next
>>  end
>>
>Jay
>Thank you. The demo worked fine but It does not replicate the problem here.
>I get the same result in my application when I look at the window at the
>point of closing the Edit Field. The problem shows up during the transition
>between two functions. The first function contains the edit field and EDIT
>FIELD CLOSE, the second function puts text on the screen with no edit field.
>Both functions have the same RGBBACKCOLOR. The EDIT FIELD CLOSE statement
>must trigger a window update event with a white CLS or white PAINTRECT
>because I can slow down (or freeze) the action at the window update portion
>of my code and see a white window. I use PG:PRO and tried several
>combinations of window settings but got the same problem. Roberts hack gives
>acceptable results. However, the first pass always produces a flash but
>subsequent passes are fine with no white flash. I can live with that.
>Barrie

Barrie,

Have you set RGBBackColor just before you CREATE the EF? If so, I'll
shut up, but I don't think I saw that in the example you posted. I'd
still like to have a demo that illustrates your problem.

I know Robert's work-around is adequate for your purposes and you'd
like to move on to other things, but I'm interested in:
  A) finding out if there really is a bug
  B) clarifying how colors in EFs work
  C) not propagating an impression the runtime is faulty if it's not

If you have to move on, I'll understand, but I hope you can spare a
little more time to help figure this out.

  e-e
  =J= a  y
   "