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<title>Graphics/Rendering/Chart/Axis/Indexed.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.Axis.Unit</span>
<a name="line-4"></a><span class='hs-comment'>-- Copyright : (c) Tim Docker 2010, 2014</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'>-- Calculate and render indexed axes</span>
<a name="line-8"></a>
<a name="line-9"></a><span class='hs-comment'>{-# LANGUAGE GeneralizedNewtypeDeriving #-}</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'>Axis</span><span class='hs-varop'>.</span><span class='hs-conid'>Indexed</span><span class='hs-layout'>(</span>
<a name="line-12"></a> <span class='hs-conid'>PlotIndex</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'>autoIndexAxis</span><span class='hs-layout'>,</span>
<a name="line-14"></a> <span class='hs-varid'>addIndexes</span><span class='hs-layout'>,</span>
<a name="line-15"></a><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-16"></a>
<a name="line-17"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Arrow</span> <span class='hs-layout'>(</span><span class='hs-varid'>first</span><span class='hs-layout'>)</span>
<a name="line-18"></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-19"></a>
<a name="line-20"></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'>Axis</span><span class='hs-varop'>.</span><span class='hs-conid'>Types</span>
<a name="line-21"></a>
<a name="line-22"></a><a name="PlotIndex"></a><span class='hs-comment'>-- | Type for capturing values plotted by index number</span>
<a name="line-23"></a><a name="PlotIndex"></a><span class='hs-comment'>-- (ie position in a list) rather than a numerical value.</span>
<a name="line-24"></a><a name="PlotIndex"></a><span class='hs-keyword'>newtype</span> <span class='hs-conid'>PlotIndex</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>PlotIndex</span> <span class='hs-layout'>{</span> <span class='hs-varid'>plotindex_i</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Int</span> <span class='hs-layout'>}</span>
<a name="line-25"></a> <span class='hs-keyword'>deriving</span> <span class='hs-layout'>(</span><span class='hs-conid'>Eq</span><span class='hs-layout'>,</span><span class='hs-conid'>Ord</span><span class='hs-layout'>,</span><span class='hs-conid'>Enum</span><span class='hs-layout'>,</span><span class='hs-conid'>Num</span><span class='hs-layout'>,</span><span class='hs-conid'>Real</span><span class='hs-layout'>,</span><span class='hs-conid'>Integral</span><span class='hs-layout'>,</span><span class='hs-conid'>Show</span><span class='hs-layout'>)</span>
<a name="line-26"></a>
<a name="line-27"></a><a name="instance%20PlotValue%20PlotIndex"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>PlotValue</span> <span class='hs-conid'>PlotIndex</span> <span class='hs-keyword'>where</span>
<a name="line-28"></a> <span class='hs-varid'>toValue</span> <span class='hs-layout'>(</span><span class='hs-conid'>PlotIndex</span> <span class='hs-varid'>i</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fromIntegral</span> <span class='hs-varid'>i</span>
<a name="line-29"></a> <span class='hs-varid'>fromValue</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>PlotIndex</span> <span class='hs-varop'>.</span> <span class='hs-varid'>round</span>
<a name="line-30"></a> <span class='hs-varid'>autoAxis</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>autoIndexAxis</span> <span class='hs-conid'>[]</span>
<a name="line-31"></a>
<a name="line-32"></a><a name="addIndexes"></a><span class='hs-comment'>-- | Augment a list of values with index numbers for plotting.</span>
<a name="line-33"></a><span class='hs-definition'>addIndexes</span> <span class='hs-keyglyph'>::</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>a</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'>PlotIndex</span><span class='hs-layout'>,</span><span class='hs-varid'>a</span><span class='hs-layout'>)</span><span class='hs-keyglyph'>]</span>
<a name="line-34"></a><span class='hs-definition'>addIndexes</span> <span class='hs-keyword'>as</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>map</span> <span class='hs-layout'>(</span><span class='hs-varid'>first</span> <span class='hs-conid'>PlotIndex</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>zip</span> <span class='hs-keyglyph'>[</span><span class='hs-num'>0</span><span class='hs-keyglyph'>..</span><span class='hs-keyglyph'>]</span> <span class='hs-keyword'>as</span><span class='hs-layout'>)</span>
<a name="line-35"></a>
<a name="line-36"></a><a name="autoIndexAxis"></a><span class='hs-comment'>-- | Create an axis for values indexed by position. The</span>
<a name="line-37"></a><span class='hs-comment'>-- list of strings are the labels to be used.</span>
<a name="line-38"></a><span class='hs-definition'>autoIndexAxis</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Integral</span> <span class='hs-varid'>i</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-varid'>i</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>AxisData</span> <span class='hs-varid'>i</span>
<a name="line-39"></a><span class='hs-definition'>autoIndexAxis</span> <span class='hs-varid'>labels</span> <span class='hs-varid'>vs</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>AxisData</span> <span class='hs-layout'>{</span>
<a name="line-40"></a> <span class='hs-sel'>_axis_visibility</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>def</span> <span class='hs-layout'>{</span> <span class='hs-sel'>_axis_show_ticks</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>False</span> <span class='hs-layout'>}</span><span class='hs-layout'>,</span>
<a name="line-41"></a> <span class='hs-sel'>_axis_viewport</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>vport</span><span class='hs-layout'>,</span>
<a name="line-42"></a> <span class='hs-sel'>_axis_tropweiv</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>invport</span><span class='hs-layout'>,</span>
<a name="line-43"></a> <span class='hs-sel'>_axis_ticks</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>[]</span><span class='hs-layout'>,</span>
<a name="line-44"></a> <span class='hs-sel'>_axis_labels</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>filter</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-layout'>(</span><span class='hs-varid'>i</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'>i</span> <span class='hs-varop'>>=</span> <span class='hs-varid'>imin</span> <span class='hs-varop'>&&</span> <span class='hs-varid'>i</span> <span class='hs-varop'><=</span> <span class='hs-varid'>imax</span><span class='hs-layout'>)</span>
<a name="line-45"></a> <span class='hs-layout'>(</span><span class='hs-varid'>zip</span> <span class='hs-keyglyph'>[</span><span class='hs-num'>0</span><span class='hs-keyglyph'>..</span><span class='hs-keyglyph'>]</span> <span class='hs-varid'>labels</span><span class='hs-layout'>)</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>,</span>
<a name="line-46"></a> <span class='hs-sel'>_axis_grid</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>[]</span>
<a name="line-47"></a> <span class='hs-layout'>}</span>
<a name="line-48"></a> <span class='hs-keyword'>where</span>
<a name="line-49"></a> <span class='hs-varid'>vport</span> <span class='hs-varid'>r</span> <span class='hs-varid'>i</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>linMap</span> <span class='hs-varid'>id</span> <span class='hs-layout'>(</span> <span class='hs-varid'>fromIntegral</span> <span class='hs-varid'>imin</span> <span class='hs-comment'>-</span> <span class='hs-num'>0.5</span>
<a name="line-50"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>fromIntegral</span> <span class='hs-varid'>imax</span> <span class='hs-varop'>+</span> <span class='hs-num'>0.5</span><span class='hs-layout'>)</span> <span class='hs-varid'>r</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromIntegral</span> <span class='hs-varid'>i</span><span class='hs-layout'>)</span>
<a name="line-51"></a> <span class='hs-varid'>invport</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>invLinMap</span> <span class='hs-varid'>round</span> <span class='hs-varid'>fromIntegral</span> <span class='hs-layout'>(</span><span class='hs-varid'>imin</span><span class='hs-layout'>,</span> <span class='hs-varid'>imax</span><span class='hs-layout'>)</span>
<a name="line-52"></a> <span class='hs-varid'>imin</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>minimum</span> <span class='hs-varid'>vs</span>
<a name="line-53"></a> <span class='hs-varid'>imax</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>maximum</span> <span class='hs-varid'>vs</span>
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