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<pre><a name="line-1"></a><span class='hs-comment'>{-# LANGUAGE ScopedTypeVariables, TemplateHaskell, TypeSynonymInstances, FlexibleInstances #-}</span>
<a name="line-2"></a><span class='hs-comment'>----------------------------------------------------------------------------</span>
<a name="line-3"></a><span class='hs-comment'>-- |</span>
<a name="line-4"></a><span class='hs-comment'>-- Module : Graphics.Rendering.Chart.Easy</span>
<a name="line-5"></a><span class='hs-comment'>-- Copyright : (c) Tim Docker 2014</span>
<a name="line-6"></a><span class='hs-comment'>-- License : BSD-style (see chart/COPYRIGHT)</span>
<a name="line-7"></a><span class='hs-comment'>--</span>
<a name="line-8"></a><span class='hs-comment'>-- A high level API for generating a plot quickly.</span>
<a name="line-9"></a><span class='hs-comment'>-- </span>
<a name="line-10"></a><span class='hs-comment'>-- Importing the Easy module brings into scope all core functions and types required</span>
<a name="line-11"></a><span class='hs-comment'>-- for working with the chart library. This includes key external dependencies such as</span>
<a name="line-12"></a><span class='hs-comment'>-- Control.Len and Data.Colour. The module also provides several helper functions for</span>
<a name="line-13"></a><span class='hs-comment'>-- quickly generating common plots. Note that chart backends must still be explicitly</span>
<a name="line-14"></a><span class='hs-comment'>-- imported, as some backends cannot be built on all platforms.</span>
<a name="line-15"></a><span class='hs-comment'>--</span>
<a name="line-16"></a><span class='hs-comment'>-- Example usage:</span>
<a name="line-17"></a><span class='hs-comment'>--</span>
<a name="line-18"></a><span class='hs-comment'>-- > import Graphics.Rendering.Chart.Easy</span>
<a name="line-19"></a><span class='hs-comment'>-- > import Graphics.Rendering.Chart.Backend.Cairo</span>
<a name="line-20"></a><span class='hs-comment'>-- > </span>
<a name="line-21"></a><span class='hs-comment'>-- > signal :: [Double] -> [(Double,Double)]</span>
<a name="line-22"></a><span class='hs-comment'>-- > signal xs = [ (x,(sin (x*3.14159/45) + 1) / 2 * (sin (x*3.14159/5))) | x <- xs ]</span>
<a name="line-23"></a><span class='hs-comment'>-- > </span>
<a name="line-24"></a><span class='hs-comment'>-- > main = toFile def "example.png" $ do</span>
<a name="line-25"></a><span class='hs-comment'>-- > layout_title .= "Amplitude Modulation"</span>
<a name="line-26"></a><span class='hs-comment'>-- > plot (line "am" [signal [0,(0.5)..400]])</span>
<a name="line-27"></a><span class='hs-comment'>-- > plot (points "am points" (signal [0,7..400]))</span>
<a name="line-28"></a><span class='hs-comment'>--</span>
<a name="line-29"></a><span class='hs-comment'>-- More examples can be found on the <https://github.com/timbod7/haskell-chart/wiki library's wiki></span>
<a name="line-30"></a>
<a name="line-31"></a><span class='hs-keyword'>module</span> <span class='hs-conid'>Graphics</span><span class='hs-varop'>.</span><span class='hs-conid'>Rendering</span><span class='hs-varop'>.</span><span class='hs-conid'>Chart</span><span class='hs-varop'>.</span><span class='hs-conid'>Easy</span><span class='hs-layout'>(</span>
<a name="line-32"></a>
<a name="line-33"></a> <span class='hs-keyword'>module</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Lens</span><span class='hs-layout'>,</span>
<a name="line-34"></a> <span class='hs-keyword'>module</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Default</span><span class='hs-varop'>.</span><span class='hs-conid'>Class</span><span class='hs-layout'>,</span>
<a name="line-35"></a> <span class='hs-keyword'>module</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Colour</span><span class='hs-layout'>,</span>
<a name="line-36"></a> <span class='hs-keyword'>module</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Colour</span><span class='hs-varop'>.</span><span class='hs-conid'>Names</span><span class='hs-layout'>,</span>
<a name="line-37"></a>
<a name="line-38"></a> <span class='hs-keyword'>module</span> <span class='hs-conid'>Graphics</span><span class='hs-varop'>.</span><span class='hs-conid'>Rendering</span><span class='hs-varop'>.</span><span class='hs-conid'>Chart</span><span class='hs-layout'>,</span>
<a name="line-39"></a> <span class='hs-keyword'>module</span> <span class='hs-conid'>Graphics</span><span class='hs-varop'>.</span><span class='hs-conid'>Rendering</span><span class='hs-varop'>.</span><span class='hs-conid'>Chart</span><span class='hs-varop'>.</span><span class='hs-conid'>State</span><span class='hs-layout'>,</span>
<a name="line-40"></a>
<a name="line-41"></a> <span class='hs-varid'>line</span><span class='hs-layout'>,</span>
<a name="line-42"></a> <span class='hs-varid'>points</span><span class='hs-layout'>,</span>
<a name="line-43"></a> <span class='hs-varid'>bars</span><span class='hs-layout'>,</span>
<a name="line-44"></a> <span class='hs-varid'>setColors</span><span class='hs-layout'>,</span>
<a name="line-45"></a> <span class='hs-varid'>setShapes</span>
<a name="line-46"></a> <span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-47"></a>
<a name="line-48"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Lens</span>
<a name="line-49"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Monad</span><span class='hs-layout'>(</span><span class='hs-varid'>when</span><span class='hs-layout'>)</span>
<a name="line-50"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Default</span><span class='hs-varop'>.</span><span class='hs-conid'>Class</span>
<a name="line-51"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Colour</span> <span class='hs-varid'>hiding</span> <span class='hs-layout'>(</span><span class='hs-varid'>over</span><span class='hs-layout'>)</span> <span class='hs-comment'>-- overlaps with lens over function</span>
<a name="line-52"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Colour</span><span class='hs-varop'>.</span><span class='hs-conid'>Names</span>
<a name="line-53"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Graphics</span><span class='hs-varop'>.</span><span class='hs-conid'>Rendering</span><span class='hs-varop'>.</span><span class='hs-conid'>Chart</span>
<a name="line-54"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Graphics</span><span class='hs-varop'>.</span><span class='hs-conid'>Rendering</span><span class='hs-varop'>.</span><span class='hs-conid'>Chart</span><span class='hs-varop'>.</span><span class='hs-conid'>State</span>
<a name="line-55"></a>
<a name="line-56"></a><a name="setColors"></a><span class='hs-comment'>-- | Set the contents of the colour source, for</span>
<a name="line-57"></a><span class='hs-comment'>-- subsequent plots</span>
<a name="line-58"></a><span class='hs-definition'>setColors</span> <span class='hs-keyglyph'>::</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>AlphaColour</span> <span class='hs-conid'>Double</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>EC</span> <span class='hs-varid'>l</span> <span class='hs-conid'>()</span>
<a name="line-59"></a><span class='hs-definition'>setColors</span> <span class='hs-varid'>cs</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>liftCState</span> <span class='hs-varop'>$</span> <span class='hs-varid'>colors</span> <span class='hs-varop'>.=</span> <span class='hs-varid'>cycle</span> <span class='hs-varid'>cs</span>
<a name="line-60"></a>
<a name="line-61"></a><a name="setShapes"></a><span class='hs-comment'>-- | Set the contents of the shape source, for</span>
<a name="line-62"></a><span class='hs-comment'>-- subsequent plots</span>
<a name="line-63"></a><span class='hs-definition'>setShapes</span> <span class='hs-keyglyph'>::</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>PointShape</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>EC</span> <span class='hs-varid'>l</span> <span class='hs-conid'>()</span>
<a name="line-64"></a><span class='hs-definition'>setShapes</span> <span class='hs-varid'>ps</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>liftCState</span> <span class='hs-varop'>$</span> <span class='hs-varid'>shapes</span> <span class='hs-varop'>.=</span> <span class='hs-varid'>cycle</span> <span class='hs-varid'>ps</span>
<a name="line-65"></a>
<a name="line-66"></a><a name="line"></a><span class='hs-comment'>-- | Constuct a line plot with the given title and</span>
<a name="line-67"></a><span class='hs-comment'>-- data, using the next available color.</span>
<a name="line-68"></a><span class='hs-definition'>line</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-keyglyph'>[</span><span class='hs-layout'>(</span><span class='hs-varid'>x</span><span class='hs-layout'>,</span><span class='hs-varid'>y</span><span class='hs-layout'>)</span><span class='hs-keyglyph'>]</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>EC</span> <span class='hs-varid'>l</span> <span class='hs-layout'>(</span><span class='hs-conid'>PlotLines</span> <span class='hs-varid'>x</span> <span class='hs-varid'>y</span><span class='hs-layout'>)</span>
<a name="line-69"></a><span class='hs-definition'>line</span> <span class='hs-varid'>title</span> <span class='hs-varid'>values</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>liftEC</span> <span class='hs-varop'>$</span> <span class='hs-keyword'>do</span>
<a name="line-70"></a> <span class='hs-varid'>color</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>takeColor</span>
<a name="line-71"></a> <span class='hs-varid'>plot_lines_title</span> <span class='hs-varop'>.=</span> <span class='hs-varid'>title</span>
<a name="line-72"></a> <span class='hs-varid'>plot_lines_values</span> <span class='hs-varop'>.=</span> <span class='hs-varid'>values</span>
<a name="line-73"></a> <span class='hs-varid'>plot_lines_style</span> <span class='hs-varop'>.</span> <span class='hs-varid'>line_color</span> <span class='hs-varop'>.=</span> <span class='hs-varid'>color</span>
<a name="line-74"></a>
<a name="line-75"></a><a name="points"></a><span class='hs-comment'>-- | Construct a scatter plot with the given title and data, using the</span>
<a name="line-76"></a><span class='hs-comment'>-- next available color and point shape.</span>
<a name="line-77"></a><span class='hs-definition'>points</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-layout'>(</span><span class='hs-varid'>x</span><span class='hs-layout'>,</span><span class='hs-varid'>y</span><span class='hs-layout'>)</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>EC</span> <span class='hs-varid'>l</span> <span class='hs-layout'>(</span><span class='hs-conid'>PlotPoints</span> <span class='hs-varid'>x</span> <span class='hs-varid'>y</span><span class='hs-layout'>)</span>
<a name="line-78"></a><span class='hs-definition'>points</span> <span class='hs-varid'>title</span> <span class='hs-varid'>values</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>liftEC</span> <span class='hs-varop'>$</span> <span class='hs-keyword'>do</span>
<a name="line-79"></a> <span class='hs-varid'>color</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>takeColor</span>
<a name="line-80"></a> <span class='hs-varid'>shape</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>takeShape</span>
<a name="line-81"></a> <span class='hs-varid'>plot_points_values</span> <span class='hs-varop'>.=</span> <span class='hs-varid'>values</span>
<a name="line-82"></a> <span class='hs-varid'>plot_points_title</span> <span class='hs-varop'>.=</span> <span class='hs-varid'>title</span>
<a name="line-83"></a> <span class='hs-varid'>plot_points_style</span> <span class='hs-varop'>.</span> <span class='hs-varid'>point_color</span> <span class='hs-varop'>.=</span> <span class='hs-varid'>color</span>
<a name="line-84"></a> <span class='hs-varid'>plot_points_style</span> <span class='hs-varop'>.</span> <span class='hs-varid'>point_shape</span> <span class='hs-varop'>.=</span> <span class='hs-varid'>shape</span>
<a name="line-85"></a> <span class='hs-varid'>plot_points_style</span> <span class='hs-varop'>.</span> <span class='hs-varid'>point_radius</span> <span class='hs-varop'>.=</span> <span class='hs-num'>2</span>
<a name="line-86"></a>
<a name="line-87"></a> <span class='hs-comment'>-- Show borders for unfilled shapes</span>
<a name="line-88"></a> <span class='hs-varid'>when</span> <span class='hs-layout'>(</span><span class='hs-varid'>not</span> <span class='hs-layout'>(</span><span class='hs-varid'>isFilled</span> <span class='hs-varid'>shape</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-keyword'>do</span>
<a name="line-89"></a> <span class='hs-varid'>plot_points_style</span> <span class='hs-varop'>.</span> <span class='hs-varid'>point_border_color</span> <span class='hs-varop'>.=</span> <span class='hs-varid'>color</span>
<a name="line-90"></a> <span class='hs-varid'>plot_points_style</span> <span class='hs-varop'>.</span> <span class='hs-varid'>point_border_width</span> <span class='hs-varop'>.=</span> <span class='hs-num'>1</span>
<a name="line-91"></a>
<a name="line-92"></a><a name="isFilled"></a><span class='hs-definition'>isFilled</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>PointShape</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bool</span>
<a name="line-93"></a><span class='hs-definition'>isFilled</span> <span class='hs-conid'>PointShapeCircle</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>True</span>
<a name="line-94"></a><span class='hs-definition'>isFilled</span> <span class='hs-conid'>PointShapePolygon</span><span class='hs-layout'>{</span><span class='hs-layout'>}</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>True</span>
<a name="line-95"></a><span class='hs-definition'>isFilled</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>False</span>
<a name="line-96"></a>
<a name="line-97"></a><a name="bars"></a><span class='hs-comment'>-- | Construct a bar chart with the given titles and data, using the</span>
<a name="line-98"></a><span class='hs-comment'>-- next available colors </span>
<a name="line-99"></a><span class='hs-definition'>bars</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>PlotValue</span> <span class='hs-varid'>x</span><span class='hs-layout'>,</span> <span class='hs-conid'>BarsPlotValue</span> <span class='hs-varid'>y</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>String</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-layout'>(</span><span class='hs-varid'>x</span><span class='hs-layout'>,</span><span class='hs-keyglyph'>[</span><span class='hs-varid'>y</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>)</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>EC</span> <span class='hs-varid'>l</span> <span class='hs-layout'>(</span><span class='hs-conid'>PlotBars</span> <span class='hs-varid'>x</span> <span class='hs-varid'>y</span><span class='hs-layout'>)</span>
<a name="line-100"></a><span class='hs-definition'>bars</span> <span class='hs-varid'>titles</span> <span class='hs-varid'>vals</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>liftEC</span> <span class='hs-varop'>$</span> <span class='hs-keyword'>do</span>
<a name="line-101"></a> <span class='hs-varid'>styles</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>sequence</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>fmap</span> <span class='hs-varid'>mkStyle</span> <span class='hs-varid'>takeColor</span> <span class='hs-keyglyph'>|</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>titles</span><span class='hs-keyglyph'>]</span>
<a name="line-102"></a> <span class='hs-varid'>plot_bars_titles</span> <span class='hs-varop'>.=</span> <span class='hs-varid'>titles</span>
<a name="line-103"></a> <span class='hs-varid'>plot_bars_values</span> <span class='hs-varop'>.=</span> <span class='hs-varid'>vals</span>
<a name="line-104"></a> <span class='hs-varid'>plot_bars_style</span> <span class='hs-varop'>.=</span> <span class='hs-conid'>BarsClustered</span>
<a name="line-105"></a> <span class='hs-varid'>plot_bars_spacing</span> <span class='hs-varop'>.=</span> <span class='hs-conid'>BarsFixGap</span> <span class='hs-num'>30</span> <span class='hs-num'>5</span>
<a name="line-106"></a> <span class='hs-varid'>plot_bars_item_styles</span> <span class='hs-varop'>.=</span> <span class='hs-varid'>styles</span>
<a name="line-107"></a> <span class='hs-keyword'>where</span>
<a name="line-108"></a> <span class='hs-varid'>mkStyle</span> <span class='hs-varid'>c</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>solidFillStyle</span> <span class='hs-varid'>c</span><span class='hs-layout'>,</span> <span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-varid'>solidLine</span> <span class='hs-num'>1.0</span> <span class='hs-varop'>$</span> <span class='hs-varid'>opaque</span> <span class='hs-varid'>black</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
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