Change the Background Color Based on Data

PlanetPress Classic
1

How to Change the Background Color Based on Data from a Spool File Using PlanetPress Designer Version 7.6.2

In the spool file, I have an HTML color code (e.g., #870400 ), and I need to change the background color based on this information. I understand that I will need to use the PlanetPress Talk language, but I seem to be making an error in my approach.

Please help

Thank You

2

I’d have a box on my page which is larger than the page itself so as to create your background and drive the color via global variables.

  1. Create 4 global variables called “c”, “m”, “y”, “k”.

  2. Add a PressTalk object on your page with the following PressTalk code:

    % Set color dynamically
% 50, 0, 0, 50
moveto(0, 0)
setfillcolor([&c, &m, &y, &k])
lineto(&width, 0.0000)
lineto(&width, &height)
lineto(0.0000, &height)
lineto(0.0000, 0.0000)
closepath()
fill()

  3. Set your PressTalk before at page level to drive the color based on your conditional logic:

    if(1 = 1)
    &c := 50
    &m := 0
    &y := 0
    &k := 50
endif()

(Obviously my condition is just set to work all the time - alter this for your use case). Also change your CMYK values to match the color you have specified above (which I haven’t looked up).

You could achieve a similar thing with a function but this breaks it down to simple steps.

Hope this helps.

3

If the color code is in HTML format, it needs to be converted to CMYK. Alternatively, can we work directly with the HTML color code? (e.g., #870400 )

4

I found the answer - for that procedure I can see only CMYK no HTML:
5.1.139 SetFillColor (procedure)
Sets the colour used to paint the insides of any closed shapes when issuing a fill or a strokeandfill
command.
Syntax
setfillcolor( colour )
Argument
colour
Colour array that can be expressed expressed using one, three or four values ranging from 0 to 255. For
Grayscale, a single value is used in the form [K]. For the RGB model, three values are used in the form [R, G,
B]. For the CMYK model, four values are used in the form [C, M, Y, K].

Thank You - I will need to convert that data before