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<title>Graphics/Rendering/Chart/Plot/Lines.hs</title>
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<pre><a name="line-1"></a><span class='hs-comment'>-----------------------------------------------------------------------------</span>
<a name="line-2"></a><span class='hs-comment'>-- |</span>
<a name="line-3"></a><span class='hs-comment'>-- Module : Graphics.Rendering.Chart.Plot.Lines</span>
<a name="line-4"></a><span class='hs-comment'>-- Copyright : (c) Tim Docker 2006</span>
<a name="line-5"></a><span class='hs-comment'>-- License : BSD-style (see chart/COPYRIGHT)</span>
<a name="line-6"></a><span class='hs-comment'>--</span>
<a name="line-7"></a><span class='hs-comment'>-- Line plots</span>
<a name="line-8"></a><span class='hs-comment'>--</span>
<a name="line-9"></a><span class='hs-comment'>{-# OPTIONS_GHC -XTemplateHaskell #-}</span>
<a name="line-10"></a>
<a name="line-11"></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'>Plot</span><span class='hs-varop'>.</span><span class='hs-conid'>Lines</span><span class='hs-layout'>(</span>
<a name="line-12"></a> <span class='hs-conid'>PlotLines</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span>
<a name="line-13"></a> <span class='hs-varid'>defaultPlotLines</span><span class='hs-layout'>,</span>
<a name="line-14"></a> <span class='hs-varid'>defaultPlotLineStyle</span><span class='hs-layout'>,</span>
<a name="line-15"></a> <span class='hs-varid'>hlinePlot</span><span class='hs-layout'>,</span>
<a name="line-16"></a> <span class='hs-varid'>vlinePlot</span><span class='hs-layout'>,</span>
<a name="line-17"></a>
<a name="line-18"></a> <span class='hs-varid'>plot_lines_title</span><span class='hs-layout'>,</span>
<a name="line-19"></a> <span class='hs-varid'>plot_lines_style</span><span class='hs-layout'>,</span>
<a name="line-20"></a> <span class='hs-varid'>plot_lines_values</span><span class='hs-layout'>,</span>
<a name="line-21"></a> <span class='hs-varid'>plot_lines_limit_values</span><span class='hs-layout'>,</span>
<a name="line-22"></a><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-23"></a>
<a name="line-24"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Accessor</span><span class='hs-varop'>.</span><span class='hs-conid'>Template</span>
<a name="line-25"></a><span class='hs-keyword'>import</span> <span class='hs-keyword'>qualified</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'>Cairo</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>C</span>
<a name="line-26"></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'>Types</span>
<a name="line-27"></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'>Renderable</span>
<a name="line-28"></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'>Plot</span><span class='hs-varop'>.</span><span class='hs-conid'>Types</span>
<a name="line-29"></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-layout'>(</span><span class='hs-varid'>opaque</span><span class='hs-layout'>)</span>
<a name="line-30"></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> <span class='hs-layout'>(</span><span class='hs-varid'>black</span><span class='hs-layout'>,</span> <span class='hs-varid'>blue</span><span class='hs-layout'>)</span>
<a name="line-31"></a>
<a name="line-32"></a><a name="PlotLines"></a><span class='hs-comment'>-- | Value defining a series of (possibly disjointed) lines,</span>
<a name="line-33"></a><a name="PlotLines"></a><span class='hs-comment'>-- and a style in which to render them.</span>
<a name="line-34"></a><a name="PlotLines"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>PlotLines</span> <span class='hs-varid'>x</span> <span class='hs-varid'>y</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>PlotLines</span> <span class='hs-layout'>{</span>
<a name="line-35"></a> <span class='hs-varid'>plot_lines_title_</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span><span class='hs-layout'>,</span>
<a name="line-36"></a> <span class='hs-varid'>plot_lines_style_</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>CairoLineStyle</span><span class='hs-layout'>,</span>
<a name="line-37"></a>
<a name="line-38"></a> <span class='hs-comment'>-- | The lines to be plotted</span>
<a name="line-39"></a> <span class='hs-varid'>plot_lines_values_</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-layout'>,</span>
<a name="line-40"></a>
<a name="line-41"></a> <span class='hs-comment'>-- | Additional lines to be plotted, specified using</span>
<a name="line-42"></a> <span class='hs-comment'>-- the Limit type to allow referencing the edges of</span>
<a name="line-43"></a> <span class='hs-comment'>-- the plot area.</span>
<a name="line-44"></a> <span class='hs-varid'>plot_lines_limit_values_</span> <span class='hs-keyglyph'>::</span> <span class='hs-keyglyph'>[</span><span class='hs-keyglyph'>[</span><span class='hs-layout'>(</span><span class='hs-conid'>Limit</span> <span class='hs-varid'>x</span><span class='hs-layout'>,</span> <span class='hs-conid'>Limit</span> <span class='hs-varid'>y</span><span class='hs-layout'>)</span><span class='hs-keyglyph'>]</span><span class='hs-keyglyph'>]</span>
<a name="line-45"></a><span class='hs-layout'>}</span>
<a name="line-46"></a>
<a name="line-47"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>ToPlot</span> <span class='hs-conid'>PlotLines</span> <span class='hs-keyword'>where</span>
<a name="line-48"></a> <span class='hs-varid'>toPlot</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Plot</span> <span class='hs-layout'>{</span>
<a name="line-49"></a> <span class='hs-varid'>plot_render_</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>renderPlotLines</span> <span class='hs-varid'>p</span><span class='hs-layout'>,</span>
<a name="line-50"></a> <span class='hs-varid'>plot_legend_</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyglyph'>[</span><span class='hs-layout'>(</span><span class='hs-varid'>plot_lines_title_</span> <span class='hs-varid'>p</span><span class='hs-layout'>,</span> <span class='hs-varid'>renderPlotLegendLines</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>,</span>
<a name="line-51"></a> <span class='hs-varid'>plot_all_points_</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span> <span class='hs-varid'>map</span> <span class='hs-varid'>fst</span> <span class='hs-varid'>pts</span> <span class='hs-varop'>++</span> <span class='hs-varid'>xs</span><span class='hs-layout'>,</span> <span class='hs-varid'>map</span> <span class='hs-varid'>snd</span> <span class='hs-varid'>pts</span> <span class='hs-varop'>++</span> <span class='hs-varid'>ys</span> <span class='hs-layout'>)</span>
<a name="line-52"></a> <span class='hs-layout'>}</span>
<a name="line-53"></a> <span class='hs-keyword'>where</span>
<a name="line-54"></a> <span class='hs-varid'>pts</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>concat</span> <span class='hs-layout'>(</span><span class='hs-varid'>plot_lines_values_</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span>
<a name="line-55"></a> <span class='hs-varid'>xs</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyglyph'>[</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>|</span> <span class='hs-layout'>(</span><span class='hs-conid'>LValue</span> <span class='hs-varid'>x</span><span class='hs-layout'>,</span><span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>concat</span> <span class='hs-layout'>(</span><span class='hs-varid'>plot_lines_limit_values_</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span><span class='hs-keyglyph'>]</span>
<a name="line-56"></a> <span class='hs-varid'>ys</span> <span class='hs-keyglyph'>=</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-keyword'>_</span><span class='hs-layout'>,</span><span class='hs-conid'>LValue</span> <span class='hs-varid'>y</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>concat</span> <span class='hs-layout'>(</span><span class='hs-varid'>plot_lines_limit_values_</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span><span class='hs-keyglyph'>]</span>
<a name="line-57"></a>
<a name="line-58"></a><a name="renderPlotLines"></a><span class='hs-definition'>renderPlotLines</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>PlotLines</span> <span class='hs-varid'>x</span> <span class='hs-varid'>y</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>PointMapFn</span> <span class='hs-varid'>x</span> <span class='hs-varid'>y</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>CRender</span> <span class='hs-conid'>()</span>
<a name="line-59"></a><span class='hs-definition'>renderPlotLines</span> <span class='hs-varid'>p</span> <span class='hs-varid'>pmap</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>preserveCState</span> <span class='hs-varop'>$</span> <span class='hs-keyword'>do</span>
<a name="line-60"></a> <span class='hs-varid'>setLineStyle</span> <span class='hs-layout'>(</span><span class='hs-varid'>plot_lines_style_</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span>
<a name="line-61"></a> <span class='hs-varid'>mapM_</span> <span class='hs-layout'>(</span><span class='hs-varid'>drawLines</span> <span class='hs-layout'>(</span><span class='hs-varid'>mapXY</span> <span class='hs-varid'>pmap</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>plot_lines_values_</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span>
<a name="line-62"></a> <span class='hs-varid'>mapM_</span> <span class='hs-layout'>(</span><span class='hs-varid'>drawLines</span> <span class='hs-varid'>pmap</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>plot_lines_limit_values_</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span>
<a name="line-63"></a> <span class='hs-keyword'>where</span>
<a name="line-64"></a> <span class='hs-varid'>drawLines</span> <span class='hs-varid'>mapfn</span> <span class='hs-varid'>pts</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>strokePath</span> <span class='hs-layout'>(</span><span class='hs-varid'>map</span> <span class='hs-varid'>mapfn</span> <span class='hs-varid'>pts</span><span class='hs-layout'>)</span>
<a name="line-65"></a>
<a name="line-66"></a><a name="renderPlotLegendLines"></a><span class='hs-definition'>renderPlotLegendLines</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>PlotLines</span> <span class='hs-varid'>x</span> <span class='hs-varid'>y</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Rect</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>CRender</span> <span class='hs-conid'>()</span>
<a name="line-67"></a><span class='hs-definition'>renderPlotLegendLines</span> <span class='hs-varid'>p</span> <span class='hs-varid'>r</span><span class='hs-keyglyph'>@</span><span class='hs-layout'>(</span><span class='hs-conid'>Rect</span> <span class='hs-varid'>p1</span> <span class='hs-varid'>p2</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>preserveCState</span> <span class='hs-varop'>$</span> <span class='hs-keyword'>do</span>
<a name="line-68"></a> <span class='hs-varid'>setLineStyle</span> <span class='hs-layout'>(</span><span class='hs-varid'>plot_lines_style_</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span>
<a name="line-69"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>y</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>p_y</span> <span class='hs-varid'>p1</span> <span class='hs-varop'>+</span> <span class='hs-varid'>p_y</span> <span class='hs-varid'>p2</span><span class='hs-layout'>)</span> <span class='hs-varop'>/</span> <span class='hs-num'>2</span>
<a name="line-70"></a> <span class='hs-varid'>strokePath</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Point</span> <span class='hs-layout'>(</span><span class='hs-varid'>p_x</span> <span class='hs-varid'>p1</span><span class='hs-layout'>)</span> <span class='hs-varid'>y</span><span class='hs-layout'>,</span> <span class='hs-conid'>Point</span> <span class='hs-layout'>(</span><span class='hs-varid'>p_x</span> <span class='hs-varid'>p2</span><span class='hs-layout'>)</span> <span class='hs-varid'>y</span><span class='hs-keyglyph'>]</span>
<a name="line-71"></a>
<a name="line-72"></a><a name="defaultPlotLineStyle"></a><span class='hs-definition'>defaultPlotLineStyle</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>CairoLineStyle</span>
<a name="line-73"></a><span class='hs-definition'>defaultPlotLineStyle</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>solidLine</span> <span class='hs-num'>1</span> <span class='hs-varop'>$</span> <span class='hs-varid'>opaque</span> <span class='hs-varid'>blue</span><span class='hs-layout'>)</span><span class='hs-layout'>{</span>
<a name="line-74"></a> <span class='hs-varid'>line_cap_</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-conid'>LineCapRound</span><span class='hs-layout'>,</span>
<a name="line-75"></a> <span class='hs-varid'>line_join_</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-conid'>LineJoinRound</span>
<a name="line-76"></a> <span class='hs-layout'>}</span>
<a name="line-77"></a>
<a name="line-78"></a><a name="defaultPlotLines"></a><span class='hs-definition'>defaultPlotLines</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>PlotLines</span> <span class='hs-varid'>x</span> <span class='hs-varid'>y</span>
<a name="line-79"></a><span class='hs-definition'>defaultPlotLines</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>PlotLines</span> <span class='hs-layout'>{</span>
<a name="line-80"></a> <span class='hs-varid'>plot_lines_title_</span> <span class='hs-keyglyph'>=</span> <span class='hs-str'>""</span><span class='hs-layout'>,</span>
<a name="line-81"></a> <span class='hs-varid'>plot_lines_style_</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>defaultPlotLineStyle</span><span class='hs-layout'>,</span>
<a name="line-82"></a> <span class='hs-varid'>plot_lines_values_</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>[]</span><span class='hs-layout'>,</span>
<a name="line-83"></a> <span class='hs-varid'>plot_lines_limit_values_</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>[]</span>
<a name="line-84"></a><span class='hs-layout'>}</span>
<a name="line-85"></a>
<a name="line-86"></a><a name="hlinePlot"></a><span class='hs-comment'>-- | Helper function to plot a single horizontal line.</span>
<a name="line-87"></a><span class='hs-definition'>hlinePlot</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>CairoLineStyle</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>b</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Plot</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span>
<a name="line-88"></a><span class='hs-definition'>hlinePlot</span> <span class='hs-varid'>t</span> <span class='hs-varid'>ls</span> <span class='hs-varid'>v</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>toPlot</span> <span class='hs-varid'>defaultPlotLines</span> <span class='hs-layout'>{</span>
<a name="line-89"></a> <span class='hs-varid'>plot_lines_title_</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>t</span><span class='hs-layout'>,</span>
<a name="line-90"></a> <span class='hs-varid'>plot_lines_style_</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>ls</span><span class='hs-layout'>,</span>
<a name="line-91"></a> <span class='hs-varid'>plot_lines_limit_values_</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyglyph'>[</span><span class='hs-keyglyph'>[</span><span class='hs-layout'>(</span><span class='hs-conid'>LMin</span><span class='hs-layout'>,</span> <span class='hs-conid'>LValue</span> <span class='hs-varid'>v</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span><span class='hs-layout'>(</span><span class='hs-conid'>LMax</span><span class='hs-layout'>,</span> <span class='hs-conid'>LValue</span> <span class='hs-varid'>v</span><span class='hs-layout'>)</span><span class='hs-keyglyph'>]</span><span class='hs-keyglyph'>]</span>
<a name="line-92"></a> <span class='hs-layout'>}</span>
<a name="line-93"></a>
<a name="line-94"></a><a name="vlinePlot"></a><span class='hs-comment'>-- | Helper function to plot a single vertical line.</span>
<a name="line-95"></a><span class='hs-definition'>vlinePlot</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>CairoLineStyle</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Plot</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span>
<a name="line-96"></a><span class='hs-definition'>vlinePlot</span> <span class='hs-varid'>t</span> <span class='hs-varid'>ls</span> <span class='hs-varid'>v</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>toPlot</span> <span class='hs-varid'>defaultPlotLines</span> <span class='hs-layout'>{</span>
<a name="line-97"></a> <span class='hs-varid'>plot_lines_title_</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>t</span><span class='hs-layout'>,</span>
<a name="line-98"></a> <span class='hs-varid'>plot_lines_style_</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>ls</span><span class='hs-layout'>,</span>
<a name="line-99"></a> <span class='hs-varid'>plot_lines_limit_values_</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyglyph'>[</span><span class='hs-keyglyph'>[</span><span class='hs-layout'>(</span><span class='hs-conid'>LValue</span> <span class='hs-varid'>v</span><span class='hs-layout'>,</span><span class='hs-conid'>LMin</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span><span class='hs-layout'>(</span><span class='hs-conid'>LValue</span> <span class='hs-varid'>v</span><span class='hs-layout'>,</span><span class='hs-conid'>LMax</span><span class='hs-layout'>)</span><span class='hs-keyglyph'>]</span><span class='hs-keyglyph'>]</span>
<a name="line-100"></a> <span class='hs-layout'>}</span>
<a name="line-101"></a>
<a name="line-102"></a><span class='hs-comment'>----------------------------------------------------------------------</span>
<a name="line-103"></a><span class='hs-comment'>-- Template haskell to derive an instance of Data.Accessor.Accessor</span>
<a name="line-104"></a><span class='hs-comment'>-- for each field.</span>
<a name="line-105"></a><span class='hs-varop'>$</span><span class='hs-layout'>(</span> <span class='hs-varid'>deriveAccessors</span> <span class='hs-chr'>'</span><span class='hs-chr'>'</span><span class='hs-conid'>PlotLines</span> <span class='hs-layout'>)</span>
<a name="line-106"></a>
<a name="line-107"></a>
<a name="line-108"></a>
<a name="line-109"></a>
</pre></body>
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