Graphics.Rendering.Chart.Types

Documentation

data Point

A point in two dimensions

Constructors

Point

Fields

p_x :: Double

p_y :: Double

Instances

Show Point

data Vector

Constructors

Vector

Fields

v_x :: Double

v_y :: Double

Instances

Show Vector

data Color

Constructors

Color

Fields

c_r :: Double

c_g :: Double

c_b :: Double

vscale :: Double -> Vector -> Vector

scale a vector by a constant

pvadd :: Point -> Vector -> Point

add a point and a vector

pvsub :: Point -> Vector -> Point

subtract a vector from a point

psub :: Point -> Point -> Vector

subtract two points

type PointMapFn = Point -> Point

a function mapping between points

data Rect

A rectangle is defined by two points

Constructors

Rect Point Point

Instances

Show Rect

data RectEdge

Constructors

E_Top

E_Bottom

E_Left

E_Right

mkrect :: Point -> Point -> Point -> Point -> Rect

Create a rectangle based upon the coordinates of 4 points

vmap :: Range -> Range -> Double -> Double

A linear mapping of points in one range to another

data CEnv

The environment present in the CRender Monad.

Constructors

CEnv

Fields

cenv_point_alignfn :: Point -> Point

A transform applied immediately prior to values being displayed in device coordinates

When device coordinates correspond to pixels, a cleaner image is created if this transform rounds to the nearest pixel. With higher-resolution output, this transform can just be the identity function.

Instances

MonadReader CEnv CRender

newtype CRender a

Constructors

DR (ReaderT CEnv Render a)

Instances

Monad CRender

Functor CRender

MonadReader CEnv CRender

runCRender :: CRender a -> CEnv -> Render a

c :: Render a -> CRender a

newtype CairoPointStyle

Abstract data type for the style of a plotted point

The contained Cairo action draws a point in the desired style, at the supplied device coordinates.

Constructors

CairoPointStyle (Point -> CRender ())

newtype CairoLineStyle

Abstract data type for the style of a line

The contained Cairo action sets the required line in the Cairo rendering state.

Constructors

CairoLineStyle (CRender ())

newtype CairoFillStyle

Abstract data type for a fill style

The contained Cairo action sets the required fill style in the Cairo rendering state.

Constructors

CairoFillStyle (CRender ())

newtype CairoFontStyle

Abstract data type for a font.

The contained Cairo action sets the required font in the Cairo rendering state.

Constructors

CairoFontStyle (CRender ())

type Range = (Double, Double)

type RectSize = (Double, Double)

black :: Color

grey8 :: Color

white :: Color

red :: Color

green :: Color

blue :: Color

moveTo :: Point -> CRender ()

lineTo :: Point -> CRender ()

alignp :: Point -> CRender Point

setClipRegion :: Point -> Point -> CRender ()

strokeLines :: [Point] -> CRender ()

stroke the lines between successive points

rectPath :: Rect -> CRender ()

make a path from a rectable

setFontStyle :: CairoFontStyle -> CRender ()

setLineStyle :: CairoLineStyle -> CRender ()

setFillStyle :: CairoFillStyle -> CRender ()

setSourceColor :: Color -> Render ()

textSize :: String -> CRender RectSize

data HTextAnchor

Constructors

HTA_Left

HTA_Centre

HTA_Right

data VTextAnchor

Constructors

VTA_Top

VTA_Centre

VTA_Bottom

VTA_BaseLine

drawText :: HTextAnchor -> VTextAnchor -> Point -> String -> CRender ()

Function to draw a textual label anchored by one of it's corners or edges.

preserveCState :: CRender a -> CRender a

Execute a rendering action in a saved context (ie bracketed between C.save and C.restore)

filledCircles

Arguments

:: Double

radius of circle

-> Color

colour

-> CairoPointStyle

hollowCircles

Arguments

:: Double

radius of circle

-> Double

thickness of line

-> Color

-> CairoPointStyle

hollowPolygon

Arguments

:: Double

radius of circle

-> Double

thickness of line

-> Int

Number of vertices

-> Bool

Is right-side-up?

-> Color

-> CairoPointStyle

filledPolygon

Arguments

:: Double

radius of circle

-> Int

Number of vertices

-> Bool

Is right-side-up?

-> Color

-> CairoPointStyle

plusses

Arguments

:: Double

radius of circle

-> Double

thickness of line

-> Color

-> CairoPointStyle

exes

Arguments

:: Double

radius of circle

-> Double

thickness of line

-> Color

-> CairoPointStyle

stars

Arguments

:: Double

radius of circle

-> Double

thickness of line

-> Color

-> CairoPointStyle

solidLine

Arguments

:: Double

width of line

-> Color

-> CairoLineStyle

dashedLine

Arguments

:: Double

width of line

-> [Double]

the dash pattern in device coordinates

-> Color

-> CairoLineStyle

fontStyle

Arguments

:: String

the font name

-> Double

the font size

-> FontSlant

the font slant

-> FontWeight

the font weight

-> CairoFontStyle

solidFillStyle :: Color -> CairoFillStyle

defaultPointStyle :: CairoPointStyle

defaultFontStyle :: CairoFontStyle

isValidNumber :: RealFloat a => a -> Bool