Documentation

data AxisData x Source

The basic data associated with an axis showing values of type x.

Constructors

AxisData

Fields

axis_viewport_ :: Range -> x -> Double: The axis_viewport_ function maps values into device coordinates.
axis_tropweiv_ :: Range -> Double -> x: The axis_tropweiv_ function maps device coordinates back to values.
axis_ticks_ :: [(x, Double)]: The tick marks on the axis as pairs. The first element is the position on the axis (in viewport units) and the second element is the length of the tick in output coordinates. The tick starts on the axis, and positive numbers are drawn towards the plot area.
axis_labels_ :: [[(x, String)]]: The labels on an axis as pairs. The first element of the pair is the position on the axis (in viewport units) and the second is the label text string. Note that multiple sets of labels can be specified, and are shown successively further away from the axis line.
axis_grid_ :: [x]: The positions on the axis (in viewport units) where we want to show grid lines.

data AxisT x Source

Collect the information we need to render an axis. The bool is true if the axis direction is reversed.

Constructors

AxisT RectEdge AxisStyle Bool (AxisData x)

data AxisStyle Source

Control values for how an axis gets displayed.

Constructors

AxisStyle
Fields axis_line_style_ :: CairoLineStyle axis_label_style_ :: CairoFontStyle axis_grid_style_ :: CairoLineStyle axis_label_gap_ :: Double How far the labels are to be drawn from the axis.

class Ord a => PlotValue a whereSource

A typeclass abstracting the functions we need to be able to plot against an axis of type a

Methods

toValue :: a -> Double Source

fromValue :: Double -> aSource

autoAxis :: AxisFn aSource

Instances

PlotValue Double
PlotValue Int
PlotValue Integer
PlotValue ()
PlotValue LocalTime
PlotValue LogValue
PlotValue Percent
PlotValue PlotIndex

type AxisFn x = [x] -> AxisData xSource

A function to generate the axis data, given the data values to be plotted against it.

defaultAxisLineStyle :: CairoLineStyle Source

defaultAxisStyle :: AxisStyle Source

defaultGridLineStyle :: CairoLineStyle Source

makeAxis :: PlotValue x => (x -> String) -> ([x], [x], [x]) -> AxisData xSource

Construct an axis given the positions for ticks, grid lines, and labels, and the labelling function

makeAxis' :: Ord x => (x -> Double) -> (Double -> x) -> (x -> String) -> ([x], [x], [x]) -> AxisData xSource

Construct an axis given the positions for ticks, grid lines, and labels, and the positioning and labelling functions

axisToRenderable :: AxisT x -> Renderable xSource

Construct a renderable from an axis, in order that it can be composed with other renderables and drawn. This does not include the drawing of the grid, which must be done separately by the renderAxisGrid function.

renderAxisGrid :: RectSize -> AxisT z -> CRender ()Source

axisOverhang :: Ord x => AxisT x -> CRender (Double, Double)Source

Calculate the amount by which the labels extend beyond the ends of the axis.

vmap :: PlotValue x => (x, x) -> Range -> x -> Double Source

A linear mapping of points in one range to another.

invmap :: PlotValue x => (x, x) -> Range -> Double -> xSource

The inverse mapping from device co-ordinate range back to interesting values.

linMap :: (a -> Double) -> (a, a) -> Range -> a -> Double Source

A linear mapping of points in one range to another.

invLinMap :: (Double -> a) -> (a -> Double) -> (a, a) -> Range -> Double -> aSource

An inverse linear mapping of points from one range to another.

axisGridAtTicks :: AxisData x -> AxisData xSource