Safe Haskell	None

Graphics.Rendering.Chart

Description

A Simple framework for creating 2D charts in Haskell.

The basic model is that you define a value of type Renderable, typically by applying toRenderable to some other value. This Renderable is then actually displayed or output by calling either renderableToPNGFile, or renderableToWindow.

Currently, the only useful Renderable for displaying charts is created by applying toRenderable to a value of type Layout1

Synopsis

Documentation

data Renderable Source

A Renderable is a record of functions required to layout a graphic element.

Constructors

Renderable
Fields minsize :: Render RectSize a Cairo action to calculate a minimum size, render :: Rect -> Render () a Cairo action for drawing it within a specified rectangle.

class ToRenderable a whereSource

A type class abtracting the conversion of a value to a Renderable.

Methods

toRenderable :: a -> Renderable Source

Instances

ToRenderable Legend
ToRenderable AxisT
ToRenderable Layout1

data Layout1 Source

A Layout1 value is a single plot area, with optional: axes on each of the 4 sides; title at the top; legend at the bottom.

Constructors

Layout1
Fields layout1_background :: CairoFillStyle layout1_title :: String layout1_title_style :: CairoFontStyle layout1_horizontal_axes :: AxesFn layout1_vertical_axes :: AxesFn layout1_margin :: Double layout1_plots :: [(String, HAxis, VAxis, Plot)] layout1_legend :: Maybe LegendStyle

Instances

ToRenderable Layout1

data Axis Source

The concrete data type for an axis

Constructors

Axis

Fields

axis_viewport :: Range -> Double -> Double: The axis_viewport function maps values into device cordinates.
axis_ticks :: [(Double, 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 number are drawn towards the plot area.
axis_labels :: [(Double, String)]: The labels on an axis as pairs. The first element is the position on the axis (in viewport units) and the second is the label text string.
axis_grid :: [Double]: The positions on the axis (in viewport units) where we want to show grid lines.
axis_label_gap :: Double: How far the labels are to be drawn from the axis.
axis_line_style :: CairoLineStyle
axis_label_style :: CairoFontStyle
axis_grid_style :: CairoLineStyle

data Plot Source

Interface to control plotting on a 2D area.

Constructors

Plot

Fields

plot_render :: PointMapFn -> Render (): Given the mapping between model space coordinates and device coordinates, render this plot into a chart.
plot_render_legend :: Rect -> Render (): Render a small sample of this plot into the given rectangle. This is for used to generate a the legend a chart.
plot_all_points :: [Point]: All of the model space coordinates to be plotted. These are used to autoscale the axes where necessary.

class ToPlot a whereSource

a type class abstracting the conversion of a value to a Plot.

Methods

toPlot :: a -> Plot Source

Instances

ToPlot PlotFillBetween
ToPlot PlotPoints
ToPlot PlotLines

data PlotPoints Source

Value defining a series of datapoints, and a style in which to render them

Constructors

PlotPoints
Fields plot_points_style :: CairoPointStyle plot_points_values :: [Point]

Instances

ToPlot PlotPoints

data PlotLines Source

Value defining a series of (possibly disjointed) lines, and a style in which to render them

Constructors

PlotLines
Fields plot_lines_style :: CairoLineStyle plot_lines_values :: [[Point]]

Instances

ToPlot PlotLines

data PlotFillBetween Source

Value specifying a plot filling the area between two sets of Y coordinates, given common X coordinates.

Constructors

PlotFillBetween
Fields plot_fillbetween_style :: CairoFillStyle plot_fillbetween_values :: [(Double, (Double, Double))]

Instances

ToPlot PlotFillBetween

data HAxis Source

Constructors

HA_Top
HA_Bottom

Instances

Eq HAxis

data VAxis Source

Constructors

VA_Left
VA_Right

Instances

Eq VAxis

data Rect Source

A rectangle is defined by two points

Constructors

Rect Point Point

Instances

Show Rect

data Point Source

A point in two dimensions

Constructors

Point
Fields p_x :: Double p_y :: Double

Instances

Show Point

defaultAxisLineStyle :: CairoLineStyle Source

defaultPlotLineStyle :: CairoLineStyle Source

defaultAxis :: Axis Source

defaultPlotPoints :: PlotPoints Source

defaultPlotLines :: PlotLines Source

defaultPlotFillBetween :: PlotFillBetween Source

defaultLayout1 :: Layout1 Source

filledCircles Source

Arguments

:: Double	radius of circle
-> Double	red component of colour
-> Double	green component of colour
-> Double	blue component of colour
-> CairoPointStyle

solidLine Source

Arguments

:: Double	width of line
-> Double	red component of colour
-> Double	green component of colour
-> Double	blue component of colour
-> CairoLineStyle

dashedLine Source

Arguments

:: Double	width of line
-> [Double]	the dash pattern in device coordinates
-> Double	red component of colour
-> Double	green component of colour
-> Double	blue component of colour
-> CairoLineStyle

solidFillStyle Source

Arguments

:: Double	red component of colour
-> Double	green component of colour
-> Double	blue component of colour
-> CairoFillStyle

fontStyle Source

Arguments

:: String	the font name
-> Double	the font size
-> FontSlant	the font slant
-> FontWeight	the font weight
-> CairoFontStyle

independentAxes :: AxisFn -> AxisFn -> AxesFn Source

Show independent axes on each side of the layout

linkedAxes :: AxisFn -> AxesFn Source

Show the same axis on both sides of the layout

linkedAxes' :: AxisFn -> AxesFn Source

Show the same axis on both sides of the layout, but with labels only on the primary side

explicitAxis :: Maybe Axis -> AxisFn Source

Explicitly specify an axis

autoScaledAxis :: Axis -> AxisFn Source

Generate a linear axis automatically. The supplied axis is used as a template, with the viewport, ticks, labels and grid set appropriately for the data displayed against that axies. The resulting axis will only show a grid if the template has some grid values.

autoScaledLogAxis :: Axis -> AxisFn Source

Generate a log axis automatically. The supplied axis is used as a template, with the viewport, ticks, labels and grid set appropriately for the data displayed against that axies. The resulting axis will only show a grid if the template has some grid values.

monthsAxis :: Axis -> AxisFn Source

An axis that plots dates, with ticks and labels corresponding to calendar months. The values to be plotted against this axis can be created with doubleFromClockTime

renderableToPNGFile :: Renderable -> Int -> Int -> FilePath -> IO ()Source

renderableToPDFFile :: Renderable -> Int -> Int -> FilePath -> IO ()Source

renderableToPSFile :: Renderable -> Int -> Int -> FilePath -> IO ()Source

doubleFromClockTime :: ClockTime -> Double Source

Map a clocktime value to a plot cordinate

clockTimeFromDouble :: Double -> ClockTime Source

Map a plot cordinate to a clocktime

newtype CairoLineStyle Source

Abstract data type for the style of a line

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

Constructors

CairoLineStyle (Render ())