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</pre><div class="example-wrap"><pre class="rust ">
<span class="kw">use</span> <span class="ident">abstutil</span>::<span class="ident">prettyprint_usize</span>;
<span class="kw">use</span> <span class="ident">geom</span>::{<span class="ident">Line</span>, <span class="ident">Polygon</span>, <span class="ident">Pt2D</span>};
<span class="kw">use</span> <span class="ident">map_gui</span>::<span class="ident">tools</span>::<span class="ident">ColorScale</span>;
<span class="kw">use</span> <span class="ident">widgetry</span>::{<span class="ident">Color</span>, <span class="ident">EventCtx</span>, <span class="ident">Fill</span>, <span class="ident">GeomBatch</span>, <span class="ident">LinearGradient</span>, <span class="ident">TextExt</span>, <span class="ident">Widget</span>};

<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">make_bar</span>(<span class="ident">ctx</span>: <span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="ident">EventCtx</span>, <span class="ident">scale</span>: <span class="ident">ColorScale</span>, <span class="ident">value</span>: <span class="ident">usize</span>, <span class="ident">max</span>: <span class="ident">usize</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">Widget</span> {
    <span class="kw">let</span> <span class="ident">pct_full</span> <span class="op">=</span> (<span class="ident">value</span> <span class="kw">as</span> <span class="ident">f64</span>) <span class="op">/</span> (<span class="ident">max</span> <span class="kw">as</span> <span class="ident">f64</span>);

    <span class="kw">let</span> <span class="ident">total_width</span> <span class="op">=</span> <span class="number">300.0</span>;
    <span class="kw">let</span> <span class="ident">height</span> <span class="op">=</span> <span class="number">32.0</span>;
    <span class="kw">let</span> <span class="ident">n</span> <span class="op">=</span> <span class="ident">scale</span>.<span class="number">0</span>.<span class="ident">len</span>();
    <span class="kw">let</span> <span class="ident">width_each</span> <span class="op">=</span> <span class="ident">total_width</span> <span class="op">/</span> ((<span class="ident">n</span> <span class="op">-</span> <span class="number">1</span>) <span class="kw">as</span> <span class="ident">f64</span>);

    <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">pieces</span> <span class="op">=</span> <span class="ident">Vec</span>::<span class="ident">new</span>();
    <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">width_remaining</span> <span class="op">=</span> <span class="ident">pct_full</span> <span class="op">*</span> <span class="ident">total_width</span>;
    <span class="kw">for</span> <span class="ident">i</span> <span class="kw">in</span> <span class="number">0</span>..<span class="ident">n</span> <span class="op">-</span> <span class="number">1</span> {
        <span class="kw">let</span> <span class="ident">width</span> <span class="op">=</span> <span class="ident">width_each</span>.<span class="ident">min</span>(<span class="ident">width_remaining</span>);
        <span class="ident">pieces</span>.<span class="ident">push</span>(<span class="ident">Polygon</span>::<span class="ident">rectangle</span>(<span class="ident">width</span>, <span class="ident">height</span>).<span class="ident">translate</span>((<span class="ident">i</span> <span class="kw">as</span> <span class="ident">f64</span>) <span class="op">*</span> <span class="ident">width_each</span>, <span class="number">0.0</span>));
        <span class="kw">if</span> <span class="ident">width</span> <span class="op">&lt;</span> <span class="ident">width_each</span> {
            <span class="kw">break</span>;
        }
        <span class="ident">width_remaining</span> <span class="op">-</span><span class="op">=</span> <span class="ident">width</span>;
    }

    <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">batch</span> <span class="op">=</span> <span class="ident">GeomBatch</span>::<span class="ident">new</span>();
    <span class="ident">batch</span>.<span class="ident">push</span>(
        <span class="ident">Fill</span>::<span class="ident">LinearGradient</span>(<span class="ident">LinearGradient</span> {
            <span class="ident">line</span>: <span class="ident">Line</span>::<span class="ident">must_new</span>(<span class="ident">Pt2D</span>::<span class="ident">new</span>(<span class="number">0.0</span>, <span class="number">0.0</span>), <span class="ident">Pt2D</span>::<span class="ident">new</span>(<span class="ident">total_width</span>, <span class="number">0.0</span>)),
            <span class="ident">stops</span>: <span class="ident">scale</span>
                .<span class="number">0</span>
                .<span class="ident">iter</span>()
                .<span class="ident">enumerate</span>()
                .<span class="ident">map</span>(<span class="op">|</span>(<span class="ident">idx</span>, <span class="ident">color</span>)<span class="op">|</span> ((<span class="ident">idx</span> <span class="kw">as</span> <span class="ident">f64</span>) <span class="op">/</span> ((<span class="ident">n</span> <span class="op">-</span> <span class="number">1</span>) <span class="kw">as</span> <span class="ident">f64</span>), <span class="kw-2">*</span><span class="ident">color</span>))
                .<span class="ident">collect</span>(),
        }),
        <span class="ident">Polygon</span>::<span class="ident">union_all</span>(<span class="ident">pieces</span>),
    );
    <span class="ident">batch</span>.<span class="ident">push</span>(
        <span class="ident">Color</span>::<span class="ident">BLACK</span>,
        <span class="ident">Polygon</span>::<span class="ident">rectangle</span>((<span class="number">1.0</span> <span class="op">-</span> <span class="ident">pct_full</span>) <span class="op">*</span> <span class="ident">total_width</span>, <span class="ident">height</span>)
            .<span class="ident">translate</span>(<span class="ident">pct_full</span> <span class="op">*</span> <span class="ident">total_width</span>, <span class="number">0.0</span>),
    );
    <span class="ident">Widget</span>::<span class="ident">row</span>(<span class="macro">vec</span><span class="macro">!</span>[
        <span class="macro">format</span><span class="macro">!</span>(<span class="string">&quot;{} / {}&quot;</span>, <span class="ident">prettyprint_usize</span>(<span class="ident">value</span>), <span class="ident">prettyprint_usize</span>(<span class="ident">max</span>)).<span class="ident">draw_text</span>(<span class="ident">ctx</span>),
        <span class="ident">Widget</span>::<span class="ident">draw_batch</span>(<span class="ident">ctx</span>, <span class="ident">batch</span>)
            .<span class="ident">padding</span>(<span class="number">2</span>)
            .<span class="ident">outline</span>(<span class="number">2.0</span>, <span class="ident">Color</span>::<span class="ident">WHITE</span>),
    ])
}
</pre></div>
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