Adjusting greyscale using form fields when printing.

[Father Guido Sarducci]

I want a form that has a 5" square of a single color. One of the form fields would be an input for the amount of 'greyscale' used for that color. If the color is cyan and there is a form field that I would input the percentage of 'greyscale' for that color. It would still be cyan but the 'greyscale' would be controled by the value in the field.

[Thom Parker]

The backgroud color of an annotation or form field can be controlled with a script. 

So for example, this validation script for a text form field controls the grayscale of a form field named "ColorPatch"

Gray scale values are between 0 and 1

if(!isNaN(event.value) && (event.value >= 0) && (event.value <=1))

{

    this.getField("ColorPatch").fillColor = ["G",event.value];

}

This technique can be extended to include shading for other color values. 

[Father Guido Sarducci]

WOW. Now I just have to figure out how and where to utilize the script. Is there any documentation that would help me to decode what you are explaining here?



David Kimball

[Thom Parker]

To do this sort of thing you'll need to learn a bit about PDF form fields and scripting. 

You can get started here:

https://www.pdfscripting.com/public/PDF-Form-Scripting.cfm