BackgroundColor limits white drawing color

• 07/18/2017 at 7:21 PM #41028
  AVT

  Graphical instructions together with BackgroundColor have a funny limit: No matter what BG color you set, lines and text on that background are limited to a very bright gray but can not be white. This is what I found: at least two of the color values must be not higher than 235 (then the third color can have 255). Bug?

  Code for Tests:

  Background color with white text

  BACKGROUNDCOLOR(0,0,0) // color unimportant R=235 // 1st 235 G=235 // 2nd 235 B=255 // last can have 255 DrawText("■",barindex,0,Monospaced,Bold,16) coloured(R,G,B) Return

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  BACKGROUNDCOLOR(0,0,0) // color unimportant R=235  // 1st 235 G=235  // 2nd 235 B=255  // last can have 255 DrawText("■",barindex,0,Monospaced,Bold,16) coloured(R,G,B) Return

   

  

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  07/19/2017 at 9:20 AM #41048
  Nicolas

  That’s not a bug, this is intentional, it is not possible to set a color brighter or darker than the actual background color. It was already the case with the color panel in the indicator setting, setting a dark gray color when you have a very dark background reverse the color to a brighter one. I know this is annoying when you want to plot something almost transparent… already discussed with IT finance team, I just add this query to my own wish list into the dedicated thread: https://www.prorealcode.com/topic/centralization-of-queries-and-suggestions-on-prorealtime/page/8/#post-41047

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  Bel, AVT

  

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  07/19/2017 at 1:10 PM #41075
  AVT

  I tried automatic inverting the colors when a user changes the background color. But here I am really lost, how a general formula should look like which works around these limits. Well for now it’s just one line and found a simple solution. (And for transparency we have the Alpha value now, great to use).

  Thanks Nicolas.

  

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  07/19/2017 at 1:44 PM #41081
  Nicolas

  Stop me if I’m wrong but the transparency will not help in this case: even if you make a line fully transparent with Alpha value it will not render as invisible?

  

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  07/20/2017 at 11:52 AM #41150
  AVT

  Yes, you can completely fade out color. Example here:

  Background black, Text color white (well not really completely bright white, but as far as we can go) and then fading out with Alpha. Code:

  Fade out to invisible

  BACKGROUNDCOLOR(0,0,0) // color unimportant R=235 // 1st 235 G=235 // 2nd 235 B=255 // last can have 255 Fade0=255 // bright Fade1=128 // bit less Fade2=64 // more less Fade3=32 // even more less Fade4=0 // invisible DrawText("■",barindex,0.4,Monospaced,Bold,30) coloured(R,G,B,Fade0) DrawText("■",barindex,0.2,Monospaced,Bold,30) coloured(R,G,B,Fade1) DrawText("■",barindex,0,Monospaced,Bold,30) coloured(R,G,B,Fade2) DrawText("■",barindex,-0.2,Monospaced,Bold,30) coloured(R,G,B,Fade3) DrawText("■",barindex,-0.4,Monospaced,Bold,30) coloured(R,G,B,Fade4) Return

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  BACKGROUNDCOLOR(0,0,0) // color unimportant R=235  // 1st 235 G=235  // 2nd 235 B=255  // last can have 255   Fade0=255  // bright Fade1=128  // bit less Fade2=64   // more less Fade3=32   // even more less Fade4=0    // invisible   DrawText("■",barindex,0.4,Monospaced,Bold,30) coloured(R,G,B,Fade0) DrawText("■",barindex,0.2,Monospaced,Bold,30) coloured(R,G,B,Fade1) DrawText("■",barindex,0,Monospaced,Bold,30) coloured(R,G,B,Fade2) DrawText("■",barindex,-0.2,Monospaced,Bold,30) coloured(R,G,B,Fade3) DrawText("■",barindex,-0.4,Monospaced,Bold,30) coloured(R,G,B,Fade4) Return

   

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