FRP.UISF.Graphics.Color

Documentation

data Color

We provide a data type for colors to allow users to easily and clearly specify common colors. Primary and secondary RGB colors are represented along with a few beige colors for use in many GUI elements.

Constructors

Black

Blue

Green

Cyan

Red

Magenta

Yellow

White

Gray

VLightBeige

LightBeige

This is the default background color for the UI window.

MediumBeige

DarkBeige

Instances

Bounded Color

Enum Color

Eq Color

Ord Color

Read Color

Show Color

Ix Color

NFData Color

data RGB

RGB can be used to specify colors more precisely. Create them with one of the two smart constructors rgb or rgbE.

Instances

Eq RGB

Show RGB

NFData RGB

colorToRGB :: Color -> RGB

Generally used as an internal function for converting Color to RGB, but can be used by anyone.

rgb :: (Integral r, Integral g, Integral b) => r -> g -> b -> Maybe RGB

This function takes three integral values between 0 and 255 inclusive and create an RGB value with them. If any of the values fall outside the acceptable range, Nothing is returned.

rgbE :: (Integral r, Integral g, Integral b, Show r, Show g, Show b) => r -> g -> b -> RGB

This is a version of rgb that throws an error when a given value falls outside the acceptable 0-255 range. The error message shows the bad input, so the extra Show constraint is necessary.

extractRGB :: (Integral r, Integral g, Integral b) => RGB -> (r, g, b)

Use this to extract the values from an RGB color.