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</pre><div class="example-wrap"><pre class="rust ">
<span class="doccomment">//! This crate contains common code for applications that draw and interact with a `Map`.</span>

<span class="attribute">#[<span class="ident">macro_use</span>]</span>
<span class="kw">extern</span> <span class="kw">crate</span> <span class="ident">anyhow</span>;
<span class="attribute">#[<span class="ident">macro_use</span>]</span>
<span class="kw">extern</span> <span class="kw">crate</span> <span class="ident">log</span>;

<span class="kw">use</span> <span class="ident">abstutil</span>::<span class="ident">Timer</span>;
<span class="kw">use</span> <span class="ident">geom</span>::{<span class="ident">Duration</span>, <span class="ident">Pt2D</span>, <span class="ident">Time</span>};
<span class="kw">use</span> <span class="ident">map_model</span>::{<span class="ident">AreaID</span>, <span class="ident">BuildingID</span>, <span class="ident">BusStopID</span>, <span class="ident">IntersectionID</span>, <span class="ident">LaneID</span>, <span class="ident">Map</span>, <span class="ident">ParkingLotID</span>, <span class="ident">RoadID</span>};
<span class="kw">use</span> <span class="ident">sim</span>::{<span class="ident">AgentID</span>, <span class="ident">CarID</span>, <span class="ident">PedestrianID</span>, <span class="ident">Sim</span>};
<span class="kw">use</span> <span class="ident">widgetry</span>::{<span class="ident">EventCtx</span>, <span class="ident">GfxCtx</span>, <span class="ident">State</span>};

<span class="kw">pub</span> <span class="kw">use</span> <span class="self">self</span>::<span class="ident">simple_app</span>::<span class="ident">SimpleApp</span>;
<span class="kw">use</span> <span class="kw">crate</span>::<span class="ident">render</span>::<span class="ident">DrawOptions</span>;
<span class="kw">use</span> <span class="ident">colors</span>::{<span class="ident">ColorScheme</span>, <span class="ident">ColorSchemeChoice</span>};
<span class="kw">use</span> <span class="ident">options</span>::<span class="ident">Options</span>;
<span class="kw">use</span> <span class="ident">render</span>::<span class="ident">DrawMap</span>;

<span class="kw">pub</span> <span class="kw">mod</span> <span class="ident">colors</span>;
<span class="kw">pub</span> <span class="kw">mod</span> <span class="ident">load</span>;
<span class="kw">pub</span> <span class="kw">mod</span> <span class="ident">options</span>;
<span class="kw">pub</span> <span class="kw">mod</span> <span class="ident">render</span>;
<span class="kw">mod</span> <span class="ident">simple_app</span>;
<span class="kw">pub</span> <span class="kw">mod</span> <span class="ident">tools</span>;

<span class="doccomment">/// An application wishing to use the tools in this crate has to implement this on the struct that</span>
<span class="doccomment">/// implements `widgetry::SharedAppState`, so that the tools here can access the map. See</span>
<span class="doccomment">/// `SimpleApp` for an example implementation.</span>
<span class="kw">pub</span> <span class="kw">trait</span> <span class="ident">AppLike</span> {
    <span class="kw">fn</span> <span class="ident">map</span>(<span class="kw-2">&amp;</span><span class="self">self</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="kw-2">&amp;</span><span class="ident">Map</span>;
    <span class="kw">fn</span> <span class="ident">sim</span>(<span class="kw-2">&amp;</span><span class="self">self</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="kw-2">&amp;</span><span class="ident">Sim</span>;
    <span class="kw">fn</span> <span class="ident">cs</span>(<span class="kw-2">&amp;</span><span class="self">self</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="kw-2">&amp;</span><span class="ident">ColorScheme</span>;
    <span class="kw">fn</span> <span class="ident">mut_cs</span>(<span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="ident">ColorScheme</span>;
    <span class="kw">fn</span> <span class="ident">draw_map</span>(<span class="kw-2">&amp;</span><span class="self">self</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="kw-2">&amp;</span><span class="ident">DrawMap</span>;
    <span class="kw">fn</span> <span class="ident">mut_draw_map</span>(<span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="ident">DrawMap</span>;
    <span class="kw">fn</span> <span class="ident">opts</span>(<span class="kw-2">&amp;</span><span class="self">self</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="kw-2">&amp;</span><span class="ident">Options</span>;
    <span class="kw">fn</span> <span class="ident">mut_opts</span>(<span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="ident">Options</span>;
    <span class="kw">fn</span> <span class="ident">map_switched</span>(<span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="self">self</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">map</span>: <span class="ident">Map</span>, <span class="ident">timer</span>: <span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="ident">Timer</span>);
    <span class="kw">fn</span> <span class="ident">draw_with_opts</span>(<span class="kw-2">&amp;</span><span class="self">self</span>, <span class="ident">g</span>: <span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="ident">GfxCtx</span>, <span class="ident">opts</span>: <span class="ident">DrawOptions</span>);
    <span class="doccomment">/// Create a `widgetry::State` that warps to the given point.</span>
    <span class="kw">fn</span> <span class="ident">make_warper</span>(
        <span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="self">self</span>,
        <span class="ident">ctx</span>: <span class="kw-2">&amp;</span><span class="ident">EventCtx</span>,
        <span class="ident">pt</span>: <span class="ident">Pt2D</span>,
        <span class="ident">target_cam_zoom</span>: <span class="prelude-ty">Option</span><span class="op">&lt;</span><span class="ident">f64</span><span class="op">&gt;</span>,
        <span class="ident">id</span>: <span class="prelude-ty">Option</span><span class="op">&lt;</span><span class="ident">ID</span><span class="op">&gt;</span>,
    ) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">Box</span><span class="op">&lt;</span><span class="kw">dyn</span> <span class="ident">State</span><span class="op">&lt;</span><span class="self">Self</span><span class="op">&gt;</span><span class="op">&gt;</span>
    <span class="kw">where</span>
        <span class="self">Self</span>: <span class="ident">Sized</span>;

    <span class="comment">// These two are needed to render traffic signals. Splitting them from sim() allows</span>
    <span class="comment">// applications that don&#39;t run a traffic sim to work.</span>
    <span class="kw">fn</span> <span class="ident">sim_time</span>(<span class="kw-2">&amp;</span><span class="self">self</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">Time</span> {
        <span class="self">self</span>.<span class="ident">sim</span>().<span class="ident">time</span>()
    }
    <span class="kw">fn</span> <span class="ident">current_stage_and_remaining_time</span>(<span class="kw-2">&amp;</span><span class="self">self</span>, <span class="ident">id</span>: <span class="ident">IntersectionID</span>) <span class="op">-</span><span class="op">&gt;</span> (<span class="ident">usize</span>, <span class="ident">Duration</span>) {
        <span class="self">self</span>.<span class="ident">sim</span>().<span class="ident">current_stage_and_remaining_time</span>(<span class="ident">id</span>)
    }

    <span class="doccomment">/// Change the color scheme. Idempotent. Return true if there was a change.</span>
    <span class="kw">fn</span> <span class="ident">change_color_scheme</span>(<span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="self">self</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">cs</span>: <span class="ident">ColorSchemeChoice</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">bool</span> {
        <span class="kw">if</span> <span class="self">self</span>.<span class="ident">opts</span>().<span class="ident">color_scheme</span> <span class="op">=</span><span class="op">=</span> <span class="ident">cs</span> {
            <span class="kw">return</span> <span class="bool-val">false</span>;
        }
        <span class="self">self</span>.<span class="ident">mut_opts</span>().<span class="ident">color_scheme</span> <span class="op">=</span> <span class="ident">cs</span>;
        <span class="kw-2">*</span><span class="self">self</span>.<span class="ident">mut_cs</span>() <span class="op">=</span> <span class="ident">ColorScheme</span>::<span class="ident">new</span>(<span class="ident">ctx</span>, <span class="self">self</span>.<span class="ident">opts</span>().<span class="ident">color_scheme</span>);

        <span class="ident">ctx</span>.<span class="ident">loading_screen</span>(<span class="string">&quot;rerendering map colors&quot;</span>, <span class="op">|</span><span class="ident">ctx</span>, <span class="ident">timer</span><span class="op">|</span> {
            <span class="kw-2">*</span><span class="self">self</span>.<span class="ident">mut_draw_map</span>() <span class="op">=</span> <span class="ident">DrawMap</span>::<span class="ident">new</span>(<span class="ident">ctx</span>, <span class="self">self</span>.<span class="ident">map</span>(), <span class="self">self</span>.<span class="ident">opts</span>(), <span class="self">self</span>.<span class="ident">cs</span>(), <span class="ident">timer</span>);
        });

        <span class="bool-val">true</span>
    }
}

<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Clone</span>, <span class="ident">Hash</span>, <span class="ident">PartialEq</span>, <span class="ident">Eq</span>, <span class="ident">Debug</span>, <span class="ident">PartialOrd</span>, <span class="ident">Ord</span>)]</span>
<span class="kw">pub</span> <span class="kw">enum</span> <span class="ident">ID</span> {
    <span class="ident">Road</span>(<span class="ident">RoadID</span>),
    <span class="ident">Lane</span>(<span class="ident">LaneID</span>),
    <span class="ident">Intersection</span>(<span class="ident">IntersectionID</span>),
    <span class="ident">Building</span>(<span class="ident">BuildingID</span>),
    <span class="ident">ParkingLot</span>(<span class="ident">ParkingLotID</span>),
    <span class="ident">Car</span>(<span class="ident">CarID</span>),
    <span class="ident">Pedestrian</span>(<span class="ident">PedestrianID</span>),
    <span class="ident">PedCrowd</span>(<span class="ident">Vec</span><span class="op">&lt;</span><span class="ident">PedestrianID</span><span class="op">&gt;</span>),
    <span class="ident">BusStop</span>(<span class="ident">BusStopID</span>),
    <span class="ident">Area</span>(<span class="ident">AreaID</span>),
}

<span class="kw">impl</span> <span class="ident">ID</span> {
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">from_agent</span>(<span class="ident">id</span>: <span class="ident">AgentID</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">ID</span> {
        <span class="kw">match</span> <span class="ident">id</span> {
            <span class="ident">AgentID</span>::<span class="ident">Car</span>(<span class="ident">id</span>) <span class="op">=</span><span class="op">&gt;</span> <span class="ident">ID</span>::<span class="ident">Car</span>(<span class="ident">id</span>),
            <span class="ident">AgentID</span>::<span class="ident">Pedestrian</span>(<span class="ident">id</span>) <span class="op">=</span><span class="op">&gt;</span> <span class="ident">ID</span>::<span class="ident">Pedestrian</span>(<span class="ident">id</span>),
            <span class="ident">AgentID</span>::<span class="ident">BusPassenger</span>(<span class="kw">_</span>, <span class="ident">bus</span>) <span class="op">=</span><span class="op">&gt;</span> <span class="ident">ID</span>::<span class="ident">Car</span>(<span class="ident">bus</span>),
        }
    }

    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">agent_id</span>(<span class="kw-2">&amp;</span><span class="self">self</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="prelude-ty">Option</span><span class="op">&lt;</span><span class="ident">AgentID</span><span class="op">&gt;</span> {
        <span class="kw">match</span> <span class="kw-2">*</span><span class="self">self</span> {
            <span class="ident">ID</span>::<span class="ident">Car</span>(<span class="ident">id</span>) <span class="op">=</span><span class="op">&gt;</span> <span class="prelude-val">Some</span>(<span class="ident">AgentID</span>::<span class="ident">Car</span>(<span class="ident">id</span>)),
            <span class="ident">ID</span>::<span class="ident">Pedestrian</span>(<span class="ident">id</span>) <span class="op">=</span><span class="op">&gt;</span> <span class="prelude-val">Some</span>(<span class="ident">AgentID</span>::<span class="ident">Pedestrian</span>(<span class="ident">id</span>)),
            <span class="comment">// PedCrowd doesn&#39;t map to a single agent.</span>
            <span class="kw">_</span> <span class="op">=</span><span class="op">&gt;</span> <span class="prelude-val">None</span>,
        }
    }

    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">as_intersection</span>(<span class="kw-2">&amp;</span><span class="self">self</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">IntersectionID</span> {
        <span class="kw">match</span> <span class="kw-2">*</span><span class="self">self</span> {
            <span class="ident">ID</span>::<span class="ident">Intersection</span>(<span class="ident">i</span>) <span class="op">=</span><span class="op">&gt;</span> <span class="ident">i</span>,
            <span class="kw">_</span> <span class="op">=</span><span class="op">&gt;</span> <span class="macro">panic</span><span class="macro">!</span>(<span class="string">&quot;Can&#39;t call as_intersection on {:?}&quot;</span>, <span class="self">self</span>),
        }
    }

    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">as_building</span>(<span class="kw-2">&amp;</span><span class="self">self</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">BuildingID</span> {
        <span class="kw">match</span> <span class="kw-2">*</span><span class="self">self</span> {
            <span class="ident">ID</span>::<span class="ident">Building</span>(<span class="ident">b</span>) <span class="op">=</span><span class="op">&gt;</span> <span class="ident">b</span>,
            <span class="kw">_</span> <span class="op">=</span><span class="op">&gt;</span> <span class="macro">panic</span><span class="macro">!</span>(<span class="string">&quot;Can&#39;t call as_building on {:?}&quot;</span>, <span class="self">self</span>),
        }
    }
}
</pre></div>
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