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</pre><div class="example-wrap"><pre class="rust ">
<span class="kw">use</span> <span class="ident">std::collections::BTreeSet</span>;

<span class="kw">use</span> <span class="ident">geom</span>::{<span class="ident">Duration</span>, <span class="ident">Polygon</span>, <span class="ident">Time</span>};
<span class="kw">use</span> <span class="ident">map_gui::ID</span>;
<span class="kw">use</span> <span class="ident">map_model</span>::{<span class="ident">IntersectionID</span>, <span class="ident">Map</span>, <span class="ident">RoadID</span>};
<span class="kw">use</span> <span class="ident">sim</span>::{<span class="ident">AgentType</span>, <span class="ident">TripMode</span>, <span class="ident">TripPhaseType</span>};
<span class="kw">use</span> <span class="ident">widgetry</span>::{
    <span class="ident">lctrl</span>, <span class="ident">Color</span>, <span class="ident">EventCtx</span>, <span class="ident">GeomBatch</span>, <span class="ident">GfxCtx</span>, <span class="ident">HorizontalAlignment</span>, <span class="ident">Key</span>, <span class="ident">Line</span>, <span class="ident">Panel</span>, <span class="ident">ScreenDims</span>,
    <span class="ident">ScreenPt</span>, <span class="ident">ScreenRectangle</span>, <span class="ident">Text</span>, <span class="ident">TextSpan</span>, <span class="ident">Toggle</span>, <span class="ident">VerticalAlignment</span>, <span class="ident">Widget</span>,
};

<span class="kw">pub</span> <span class="kw">use</span> <span class="self">self</span><span class="ident">::select::RoadSelector</span>;
<span class="kw">pub</span> <span class="kw">use</span> <span class="self">self</span><span class="ident">::warp</span>::{<span class="ident">warp_to_id</span>, <span class="ident">Warping</span>};
<span class="kw">use</span> <span class="kw">crate</span><span class="ident">::app::App</span>;
<span class="kw">use</span> <span class="kw">crate</span><span class="ident">::app::Transition</span>;
<span class="kw">use</span> <span class="kw">crate</span><span class="ident">::info</span>::{<span class="ident">ContextualActions</span>, <span class="ident">InfoPanel</span>, <span class="ident">Tab</span>};
<span class="kw">use</span> <span class="kw">crate</span><span class="ident">::sandbox::TimeWarpScreen</span>;

<span class="kw">mod</span> <span class="ident">select</span>;
<span class="kw">mod</span> <span class="ident">warp</span>;

<span class="comment">// TODO This is now just used in two modes...</span>
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">CommonState</span> {
    <span class="comment">// TODO Better to express these as mutex</span>
    <span class="ident">info_panel</span>: <span class="prelude-ty">Option</span><span class="op">&lt;</span><span class="ident">InfoPanel</span><span class="op">&gt;</span>,
    <span class="comment">// Just for drawing the OSD</span>
    <span class="ident">cached_actions</span>: <span class="ident">Vec</span><span class="op">&lt;</span><span class="ident">Key</span><span class="op">&gt;</span>,
}

<span class="kw">impl</span> <span class="ident">CommonState</span> {
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">new</span>() <span class="op">-</span><span class="op">&gt;</span> <span class="ident">CommonState</span> {
        <span class="ident">CommonState</span> {
            <span class="ident">info_panel</span>: <span class="prelude-val">None</span>,
            <span class="ident">cached_actions</span>: <span class="ident">Vec::new</span>(),
        }
    }

    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">event</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">app</span>: <span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="ident">App</span>,
        <span class="ident">ctx_actions</span>: <span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="kw">dyn</span> <span class="ident">ContextualActions</span>,
    ) <span class="op">-</span><span class="op">&gt;</span> <span class="prelude-ty">Option</span><span class="op">&lt;</span><span class="ident">Transition</span><span class="op">&gt;</span> {
        <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="ident">t</span>) <span class="op">=</span> <span class="ident">CommonState::debug_actions</span>(<span class="ident">ctx</span>, <span class="ident">app</span>) {
            <span class="kw">return</span> <span class="prelude-val">Some</span>(<span class="ident">t</span>);
        }

        <span class="comment">// Layers can be launched from many places, many of which don&#39;t have a way of getting at</span>
        <span class="comment">// CommonState, which is only in sandbox and debug mode. It suffices to detect here if a</span>
        <span class="comment">// layer is open and close the info panel, luckily.</span>
        <span class="kw">if</span> <span class="ident">app</span>.<span class="ident">primary</span>.<span class="ident">layer</span>.<span class="ident">is_some</span>() {
            <span class="self">self</span>.<span class="ident">info_panel</span> <span class="op">=</span> <span class="prelude-val">None</span>;
        }

        <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="ident">id</span>) <span class="op">=</span> <span class="ident">app</span>.<span class="ident">primary</span>.<span class="ident">current_selection</span>.<span class="ident">clone</span>() {
            <span class="comment">// TODO Also have a hotkey binding for this?</span>
            <span class="kw">if</span> <span class="ident">app</span>.<span class="ident">per_obj</span>.<span class="ident">left_click</span>(<span class="ident">ctx</span>, <span class="string">&quot;show info&quot;</span>) {
                <span class="ident">app</span>.<span class="ident">primary</span>.<span class="ident">layer</span> <span class="op">=</span> <span class="prelude-val">None</span>;
                <span class="kw">let</span> (<span class="ident">panel</span>, <span class="ident">maybe_transition</span>) <span class="op">=</span>
                    <span class="ident">InfoPanel::new</span>(<span class="ident">ctx</span>, <span class="ident">app</span>, <span class="ident">Tab::from_id</span>(<span class="ident">app</span>, <span class="ident">id</span>.<span class="ident">clone</span>()), <span class="ident">ctx_actions</span>);
                <span class="self">self</span>.<span class="ident">info_panel</span> <span class="op">=</span> <span class="prelude-val">Some</span>(<span class="ident">panel</span>);
                <span class="kw">if</span> <span class="ident">maybe_transition</span>.<span class="ident">is_some</span>() {
                    <span class="macro">panic!</span>(
                        <span class="string">&quot;Clicking on {:?} immediately tried to execute a transition&quot;</span>,
                        <span class="ident">id</span>
                    );
                }
                <span class="kw">return</span> <span class="prelude-val">None</span>;
            }
        }

        <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="kw-2">ref</span> <span class="kw-2">mut</span> <span class="ident">info</span>) <span class="op">=</span> <span class="self">self</span>.<span class="ident">info_panel</span> {
            <span class="kw">let</span> (<span class="ident">closed</span>, <span class="ident">maybe_t</span>) <span class="op">=</span> <span class="ident">info</span>.<span class="ident">event</span>(<span class="ident">ctx</span>, <span class="ident">app</span>, <span class="ident">ctx_actions</span>);
            <span class="kw">if</span> <span class="ident">closed</span> {
                <span class="self">self</span>.<span class="ident">info_panel</span> <span class="op">=</span> <span class="prelude-val">None</span>;
            }
            <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="ident">t</span>) <span class="op">=</span> <span class="ident">maybe_t</span> {
                <span class="kw">return</span> <span class="prelude-val">Some</span>(<span class="ident">t</span>);
            }
        }

        <span class="kw">if</span> <span class="self">self</span>.<span class="ident">info_panel</span>.<span class="ident">is_none</span>() {
            <span class="self">self</span>.<span class="ident">cached_actions</span>.<span class="ident">clear</span>();
            <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="ident">id</span>) <span class="op">=</span> <span class="ident">app</span>.<span class="ident">primary</span>.<span class="ident">current_selection</span>.<span class="ident">clone</span>() {
                <span class="comment">// Allow hotkeys to work without opening the panel.</span>
                <span class="kw">for</span> (<span class="ident">k</span>, <span class="ident">action</span>) <span class="kw">in</span> <span class="ident">ctx_actions</span>.<span class="ident">actions</span>(<span class="ident">app</span>, <span class="ident">id</span>.<span class="ident">clone</span>()) {
                    <span class="kw">if</span> <span class="ident">ctx</span>.<span class="ident">input</span>.<span class="ident">pressed</span>(<span class="ident">k</span>) {
                        <span class="kw">return</span> <span class="prelude-val">Some</span>(<span class="ident">ctx_actions</span>.<span class="ident">execute</span>(<span class="ident">ctx</span>, <span class="ident">app</span>, <span class="ident">id</span>, <span class="ident">action</span>, <span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="bool-val">false</span>));
                    }
                    <span class="self">self</span>.<span class="ident">cached_actions</span>.<span class="ident">push</span>(<span class="ident">k</span>);
                }
            }
        }

        <span class="prelude-val">None</span>
    }

    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">draw</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">app</span>: <span class="kw-2">&amp;</span><span class="ident">App</span>) {
        <span class="kw">let</span> <span class="ident">keys</span> <span class="op">=</span> <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="kw-2">ref</span> <span class="ident">info</span>) <span class="op">=</span> <span class="self">self</span>.<span class="ident">info_panel</span> {
            <span class="ident">info</span>.<span class="ident">draw</span>(<span class="ident">g</span>, <span class="ident">app</span>);
            <span class="ident">info</span>.<span class="ident">active_keys</span>()
        } <span class="kw">else</span> {
            <span class="kw-2">&amp;</span><span class="self">self</span>.<span class="ident">cached_actions</span>
        };
        <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">osd</span> <span class="op">=</span> <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="kw-2">ref</span> <span class="ident">id</span>) <span class="op">=</span> <span class="ident">app</span>.<span class="ident">primary</span>.<span class="ident">current_selection</span> {
            <span class="ident">CommonState::osd_for</span>(<span class="ident">app</span>, <span class="ident">id</span>.<span class="ident">clone</span>())
        } <span class="kw">else</span> <span class="kw">if</span> <span class="ident">app</span>.<span class="ident">opts</span>.<span class="ident">dev</span> {
            <span class="ident">Text::from_all</span>(<span class="macro">vec!</span>[
                <span class="ident">Line</span>(<span class="string">&quot;Nothing selected. Hint: &quot;</span>),
                <span class="ident">Line</span>(<span class="string">&quot;Ctrl+J&quot;</span>).<span class="ident">fg</span>(<span class="ident">g</span>.<span class="ident">style</span>().<span class="ident">text_hotkey_color</span>),
                <span class="ident">Line</span>(<span class="string">&quot; to warp&quot;</span>),
            ])
        } <span class="kw">else</span> {
            <span class="ident">Text::new</span>()
        };
        <span class="kw">if</span> <span class="op">!</span><span class="ident">keys</span>.<span class="ident">is_empty</span>() {
            <span class="ident">osd</span>.<span class="ident">append</span>(<span class="ident">Line</span>(<span class="string">&quot;   Hotkeys: &quot;</span>));
            <span class="kw">for</span> (<span class="ident">idx</span>, <span class="ident">key</span>) <span class="kw">in</span> <span class="ident">keys</span>.<span class="ident">iter</span>().<span class="ident">enumerate</span>() {
                <span class="kw">if</span> <span class="ident">idx</span> <span class="op">!</span><span class="op">=</span> <span class="number">0</span> {
                    <span class="ident">osd</span>.<span class="ident">append</span>(<span class="ident">Line</span>(<span class="string">&quot;, &quot;</span>));
                }
                <span class="ident">osd</span>.<span class="ident">append</span>(<span class="ident">Line</span>(<span class="ident">key</span>.<span class="ident">describe</span>()).<span class="ident">fg</span>(<span class="ident">g</span>.<span class="ident">style</span>().<span class="ident">text_hotkey_color</span>));
            }
        }

        <span class="ident">CommonState::draw_custom_osd</span>(<span class="ident">g</span>, <span class="ident">app</span>, <span class="ident">osd</span>);
    }

    <span class="kw">fn</span> <span class="ident">osd_for</span>(<span class="ident">app</span>: <span class="kw-2">&amp;</span><span class="ident">App</span>, <span class="ident">id</span>: <span class="ident">ID</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">Text</span> {
        <span class="kw">let</span> <span class="ident">map</span> <span class="op">=</span> <span class="kw-2">&amp;</span><span class="ident">app</span>.<span class="ident">primary</span>.<span class="ident">map</span>;
        <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">osd</span> <span class="op">=</span> <span class="ident">Text::new</span>();
        <span class="kw">match</span> <span class="ident">id</span> {
            <span class="ident">ID::Lane</span>(<span class="ident">l</span>) <span class="op">=</span><span class="op">&gt;</span> {
                <span class="kw">if</span> <span class="ident">app</span>.<span class="ident">opts</span>.<span class="ident">dev</span> {
                    <span class="ident">osd</span>.<span class="ident">append</span>(<span class="ident">Line</span>(<span class="ident">l</span>.<span class="ident">to_string</span>()).<span class="ident">bold_body</span>());
                    <span class="ident">osd</span>.<span class="ident">append</span>(<span class="ident">Line</span>(<span class="string">&quot; is &quot;</span>));
                }
                <span class="kw">let</span> <span class="ident">r</span> <span class="op">=</span> <span class="ident">map</span>.<span class="ident">get_parent</span>(<span class="ident">l</span>);
                <span class="ident">osd</span>.<span class="ident">append_all</span>(<span class="macro">vec!</span>[
                    <span class="ident">Line</span>(<span class="macro">format!</span>(<span class="string">&quot;{} of &quot;</span>, <span class="ident">map</span>.<span class="ident">get_l</span>(<span class="ident">l</span>).<span class="ident">lane_type</span>.<span class="ident">describe</span>())),
                    <span class="ident">Line</span>(<span class="ident">r</span>.<span class="ident">get_name</span>(<span class="ident">app</span>.<span class="ident">opts</span>.<span class="ident">language</span>.<span class="ident">as_ref</span>())).<span class="ident">underlined</span>(),
                ]);
                <span class="kw">if</span> <span class="ident">app</span>.<span class="ident">opts</span>.<span class="ident">dev</span> {
                    <span class="ident">osd</span>.<span class="ident">append</span>(<span class="ident">Line</span>(<span class="string">&quot; (&quot;</span>));
                    <span class="ident">osd</span>.<span class="ident">append</span>(<span class="ident">Line</span>(<span class="ident">r</span>.<span class="ident">id</span>.<span class="ident">to_string</span>()).<span class="ident">bold_body</span>());
                    <span class="ident">osd</span>.<span class="ident">append</span>(<span class="ident">Line</span>(<span class="string">&quot;)&quot;</span>));
                }
            }
            <span class="ident">ID::Building</span>(<span class="ident">b</span>) <span class="op">=</span><span class="op">&gt;</span> {
                <span class="kw">if</span> <span class="ident">app</span>.<span class="ident">opts</span>.<span class="ident">dev</span> {
                    <span class="ident">osd</span>.<span class="ident">append</span>(<span class="ident">Line</span>(<span class="ident">b</span>.<span class="ident">to_string</span>()).<span class="ident">bold_body</span>());
                    <span class="ident">osd</span>.<span class="ident">append</span>(<span class="ident">Line</span>(<span class="string">&quot; is &quot;</span>));
                }
                <span class="kw">let</span> <span class="ident">bldg</span> <span class="op">=</span> <span class="ident">map</span>.<span class="ident">get_b</span>(<span class="ident">b</span>);
                <span class="ident">osd</span>.<span class="ident">append</span>(<span class="ident">Line</span>(<span class="kw-2">&amp;</span><span class="ident">bldg</span>.<span class="ident">address</span>).<span class="ident">underlined</span>())
            }
            <span class="ident">ID::ParkingLot</span>(<span class="ident">pl</span>) <span class="op">=</span><span class="op">&gt;</span> {
                <span class="ident">osd</span>.<span class="ident">append</span>(<span class="ident">Line</span>(<span class="ident">pl</span>.<span class="ident">to_string</span>()).<span class="ident">bold_body</span>());
            }
            <span class="ident">ID::Intersection</span>(<span class="ident">i</span>) <span class="op">=</span><span class="op">&gt;</span> {
                <span class="kw">if</span> <span class="ident">map</span>.<span class="ident">get_i</span>(<span class="ident">i</span>).<span class="ident">is_border</span>() {
                    <span class="ident">osd</span>.<span class="ident">append</span>(<span class="ident">Line</span>(<span class="string">&quot;Border &quot;</span>));
                }

                <span class="kw">if</span> <span class="ident">app</span>.<span class="ident">opts</span>.<span class="ident">dev</span> {
                    <span class="ident">osd</span>.<span class="ident">append</span>(<span class="ident">Line</span>(<span class="ident">i</span>.<span class="ident">to_string</span>()).<span class="ident">bold_body</span>());
                } <span class="kw">else</span> {
                    <span class="ident">osd</span>.<span class="ident">append</span>(<span class="ident">Line</span>(<span class="string">&quot;Intersection&quot;</span>));
                }
                <span class="ident">osd</span>.<span class="ident">append</span>(<span class="ident">Line</span>(<span class="string">&quot; of &quot;</span>));

                <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">road_names</span> <span class="op">=</span> <span class="ident">BTreeSet::new</span>();
                <span class="kw">for</span> <span class="ident">r</span> <span class="kw">in</span> <span class="kw-2">&amp;</span><span class="ident">map</span>.<span class="ident">get_i</span>(<span class="ident">i</span>).<span class="ident">roads</span> {
                    <span class="ident">road_names</span>.<span class="ident">insert</span>(<span class="ident">map</span>.<span class="ident">get_r</span>(<span class="kw-2">*</span><span class="ident">r</span>).<span class="ident">get_name</span>(<span class="ident">app</span>.<span class="ident">opts</span>.<span class="ident">language</span>.<span class="ident">as_ref</span>()));
                }
                <span class="ident">list_names</span>(<span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="ident">osd</span>, <span class="op">|</span><span class="ident">l</span><span class="op">|</span> <span class="ident">l</span>.<span class="ident">underlined</span>(), <span class="ident">road_names</span>);
            }
            <span class="ident">ID::Car</span>(<span class="ident">c</span>) <span class="op">=</span><span class="op">&gt;</span> {
                <span class="kw">if</span> <span class="ident">app</span>.<span class="ident">opts</span>.<span class="ident">dev</span> {
                    <span class="ident">osd</span>.<span class="ident">append</span>(<span class="ident">Line</span>(<span class="ident">c</span>.<span class="ident">to_string</span>()).<span class="ident">bold_body</span>());
                } <span class="kw">else</span> {
                    <span class="ident">osd</span>.<span class="ident">append</span>(<span class="ident">Line</span>(<span class="macro">format!</span>(<span class="string">&quot;a {}&quot;</span>, <span class="ident">c</span>.<span class="ident">vehicle_type</span>)));
                }
                <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="ident">r</span>) <span class="op">=</span> <span class="ident">app</span>.<span class="ident">primary</span>.<span class="ident">sim</span>.<span class="ident">bus_route_id</span>(<span class="ident">c</span>) {
                    <span class="ident">osd</span>.<span class="ident">append_all</span>(<span class="macro">vec!</span>[
                        <span class="ident">Line</span>(<span class="string">&quot; serving &quot;</span>),
                        <span class="ident">Line</span>(<span class="kw-2">&amp;</span><span class="ident">map</span>.<span class="ident">get_br</span>(<span class="ident">r</span>).<span class="ident">full_name</span>).<span class="ident">underlined</span>(),
                    ]);
                }
            }
            <span class="ident">ID::Pedestrian</span>(<span class="ident">p</span>) <span class="op">=</span><span class="op">&gt;</span> {
                <span class="kw">if</span> <span class="ident">app</span>.<span class="ident">opts</span>.<span class="ident">dev</span> {
                    <span class="ident">osd</span>.<span class="ident">append</span>(<span class="ident">Line</span>(<span class="ident">p</span>.<span class="ident">to_string</span>()).<span class="ident">bold_body</span>());
                } <span class="kw">else</span> {
                    <span class="ident">osd</span>.<span class="ident">append</span>(<span class="ident">Line</span>(<span class="string">&quot;a pedestrian&quot;</span>));
                }
            }
            <span class="ident">ID::PedCrowd</span>(<span class="ident">list</span>) <span class="op">=</span><span class="op">&gt;</span> {
                <span class="ident">osd</span>.<span class="ident">append</span>(<span class="ident">Line</span>(<span class="macro">format!</span>(<span class="string">&quot;a crowd of {} pedestrians&quot;</span>, <span class="ident">list</span>.<span class="ident">len</span>())));
            }
            <span class="ident">ID::BusStop</span>(<span class="ident">bs</span>) <span class="op">=</span><span class="op">&gt;</span> {
                <span class="kw">if</span> <span class="ident">app</span>.<span class="ident">opts</span>.<span class="ident">dev</span> {
                    <span class="ident">osd</span>.<span class="ident">append</span>(<span class="ident">Line</span>(<span class="ident">bs</span>.<span class="ident">to_string</span>()).<span class="ident">bold_body</span>());
                } <span class="kw">else</span> {
                    <span class="ident">osd</span>.<span class="ident">append</span>(<span class="ident">Line</span>(<span class="string">&quot;transit stop &quot;</span>));
                    <span class="ident">osd</span>.<span class="ident">append</span>(<span class="ident">Line</span>(<span class="kw-2">&amp;</span><span class="ident">map</span>.<span class="ident">get_bs</span>(<span class="ident">bs</span>).<span class="ident">name</span>).<span class="ident">underlined</span>());
                }
                <span class="ident">osd</span>.<span class="ident">append</span>(<span class="ident">Line</span>(<span class="string">&quot; served by &quot;</span>));

                <span class="kw">let</span> <span class="ident">routes</span>: <span class="ident">BTreeSet</span><span class="op">&lt;</span><span class="ident">String</span><span class="op">&gt;</span> <span class="op">=</span> <span class="ident">map</span>
                    .<span class="ident">get_routes_serving_stop</span>(<span class="ident">bs</span>)
                    .<span class="ident">into_iter</span>()
                    .<span class="ident">map</span>(<span class="op">|</span><span class="ident">r</span><span class="op">|</span> <span class="ident">r</span>.<span class="ident">short_name</span>.<span class="ident">clone</span>())
                    .<span class="ident">collect</span>();
                <span class="ident">list_names</span>(<span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="ident">osd</span>, <span class="op">|</span><span class="ident">l</span><span class="op">|</span> <span class="ident">l</span>.<span class="ident">underlined</span>(), <span class="ident">routes</span>);
            }
            <span class="ident">ID::Area</span>(<span class="ident">a</span>) <span class="op">=</span><span class="op">&gt;</span> {
                <span class="comment">// Only selectable in dev mode anyway</span>
                <span class="ident">osd</span>.<span class="ident">append</span>(<span class="ident">Line</span>(<span class="ident">a</span>.<span class="ident">to_string</span>()).<span class="ident">bold_body</span>());
            }
            <span class="ident">ID::Road</span>(<span class="ident">r</span>) <span class="op">=</span><span class="op">&gt;</span> {
                <span class="kw">if</span> <span class="ident">app</span>.<span class="ident">opts</span>.<span class="ident">dev</span> {
                    <span class="ident">osd</span>.<span class="ident">append</span>(<span class="ident">Line</span>(<span class="ident">r</span>.<span class="ident">to_string</span>()).<span class="ident">bold_body</span>());
                    <span class="ident">osd</span>.<span class="ident">append</span>(<span class="ident">Line</span>(<span class="string">&quot; is &quot;</span>));
                }
                <span class="ident">osd</span>.<span class="ident">append</span>(<span class="ident">Line</span>(<span class="ident">map</span>.<span class="ident">get_r</span>(<span class="ident">r</span>).<span class="ident">get_name</span>(<span class="ident">app</span>.<span class="ident">opts</span>.<span class="ident">language</span>.<span class="ident">as_ref</span>())).<span class="ident">underlined</span>());
            }
        }
        <span class="ident">osd</span>
    }

    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">draw_osd</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">app</span>: <span class="kw-2">&amp;</span><span class="ident">App</span>) {
        <span class="kw">let</span> <span class="ident">osd</span> <span class="op">=</span> <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="kw-2">ref</span> <span class="ident">id</span>) <span class="op">=</span> <span class="ident">app</span>.<span class="ident">primary</span>.<span class="ident">current_selection</span> {
            <span class="ident">CommonState::osd_for</span>(<span class="ident">app</span>, <span class="ident">id</span>.<span class="ident">clone</span>())
        } <span class="kw">else</span> <span class="kw">if</span> <span class="ident">app</span>.<span class="ident">opts</span>.<span class="ident">dev</span> {
            <span class="ident">Text::from_all</span>(<span class="macro">vec!</span>[
                <span class="ident">Line</span>(<span class="string">&quot;Nothing selected. Hint: &quot;</span>),
                <span class="ident">Line</span>(<span class="string">&quot;Ctrl+J&quot;</span>).<span class="ident">fg</span>(<span class="ident">g</span>.<span class="ident">style</span>().<span class="ident">text_hotkey_color</span>),
                <span class="ident">Line</span>(<span class="string">&quot; to warp&quot;</span>),
            ])
        } <span class="kw">else</span> {
            <span class="ident">Text::new</span>()
        };
        <span class="ident">CommonState::draw_custom_osd</span>(<span class="ident">g</span>, <span class="ident">app</span>, <span class="ident">osd</span>);
    }

    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">draw_custom_osd</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">app</span>: <span class="kw-2">&amp;</span><span class="ident">App</span>, <span class="kw-2">mut</span> <span class="ident">osd</span>: <span class="ident">Text</span>) {
        <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="kw-2">ref</span> <span class="ident">action</span>) <span class="op">=</span> <span class="ident">app</span>.<span class="ident">per_obj</span>.<span class="ident">click_action</span> {
            <span class="ident">osd</span>.<span class="ident">append_all</span>(<span class="macro">vec!</span>[
                <span class="ident">Line</span>(<span class="string">&quot;; &quot;</span>),
                <span class="ident">Line</span>(<span class="string">&quot;click&quot;</span>).<span class="ident">fg</span>(<span class="ident">g</span>.<span class="ident">style</span>().<span class="ident">text_hotkey_color</span>),
                <span class="ident">Line</span>(<span class="macro">format!</span>(<span class="string">&quot; to {}&quot;</span>, <span class="ident">action</span>)),
            ]);
        }

        <span class="comment">// TODO Rendering the OSD is actually a bit hacky.</span>

        <span class="comment">// First the constant background</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::from</span>(<span class="macro">vec!</span>[(
            <span class="ident">app</span>.<span class="ident">cs</span>.<span class="ident">panel_bg</span>,
            <span class="ident">Polygon::rectangle</span>(<span class="ident">g</span>.<span class="ident">canvas</span>.<span class="ident">window_width</span>, <span class="number">1.5</span> <span class="op">*</span> <span class="ident">g</span>.<span class="ident">default_line_height</span>()),
        )]);
        <span class="ident">batch</span>.<span class="ident">append</span>(
            <span class="ident">osd</span>.<span class="ident">render</span>(<span class="ident">g</span>)
                .<span class="ident">translate</span>(<span class="number">10.0</span>, <span class="number">0.25</span> <span class="op">*</span> <span class="ident">g</span>.<span class="ident">default_line_height</span>()),
        );

        <span class="kw">if</span> <span class="ident">app</span>.<span class="ident">opts</span>.<span class="ident">dev</span> <span class="op">&amp;&amp;</span> <span class="op">!</span><span class="ident">g</span>.<span class="ident">is_screencap</span>() {
            <span class="kw">let</span> <span class="ident">dev_batch</span> <span class="op">=</span> <span class="ident">Text::from</span>(<span class="string">&quot;DEV&quot;</span>).<span class="ident">bg</span>(<span class="ident">Color::RED</span>).<span class="ident">render</span>(<span class="ident">g</span>);
            <span class="kw">let</span> <span class="ident">dims</span> <span class="op">=</span> <span class="ident">dev_batch</span>.<span class="ident">get_dims</span>();
            <span class="ident">batch</span>.<span class="ident">append</span>(<span class="ident">dev_batch</span>.<span class="ident">translate</span>(
                <span class="ident">g</span>.<span class="ident">canvas</span>.<span class="ident">window_width</span> <span class="op">-</span> <span class="ident">dims</span>.<span class="ident">width</span> <span class="op">-</span> <span class="number">10.0</span>,
                <span class="number">0.25</span> <span class="op">*</span> <span class="ident">g</span>.<span class="ident">default_line_height</span>(),
            ));
        }
        <span class="kw">let</span> <span class="ident">draw</span> <span class="op">=</span> <span class="ident">g</span>.<span class="ident">upload</span>(<span class="ident">batch</span>);
        <span class="kw">let</span> <span class="ident">top_left</span> <span class="op">=</span> <span class="ident">ScreenPt::new</span>(<span class="number">0.0</span>, <span class="ident">g</span>.<span class="ident">canvas</span>.<span class="ident">window_height</span> <span class="op">-</span> <span class="number">1.5</span> <span class="op">*</span> <span class="ident">g</span>.<span class="ident">default_line_height</span>());
        <span class="ident">g</span>.<span class="ident">redraw_at</span>(<span class="ident">top_left</span>, <span class="kw-2">&amp;</span><span class="ident">draw</span>);
        <span class="ident">g</span>.<span class="ident">canvas</span>.<span class="ident">mark_covered_area</span>(<span class="ident">ScreenRectangle::top_left</span>(
            <span class="ident">top_left</span>,
            <span class="ident">ScreenDims::new</span>(<span class="ident">g</span>.<span class="ident">canvas</span>.<span class="ident">window_width</span>, <span class="number">1.5</span> <span class="op">*</span> <span class="ident">g</span>.<span class="ident">default_line_height</span>()),
        ));
    }

    <span class="comment">// Meant to be used for launching from other states</span>
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">launch_info_panel</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">app</span>: <span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="ident">App</span>,
        <span class="ident">tab</span>: <span class="ident">Tab</span>,
        <span class="ident">ctx_actions</span>: <span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="kw">dyn</span> <span class="ident">ContextualActions</span>,
    ) {
        <span class="ident">app</span>.<span class="ident">primary</span>.<span class="ident">layer</span> <span class="op">=</span> <span class="prelude-val">None</span>;
        <span class="kw">let</span> (<span class="ident">panel</span>, <span class="ident">maybe_transition</span>) <span class="op">=</span> <span class="ident">InfoPanel::new</span>(<span class="ident">ctx</span>, <span class="ident">app</span>, <span class="ident">tab</span>, <span class="ident">ctx_actions</span>);
        <span class="kw">if</span> <span class="ident">maybe_transition</span>.<span class="ident">is_some</span>() {
            <span class="macro">panic!</span>(<span class="string">&quot;launch_info_panel for some tab immediately tried to execute a transition&quot;</span>);
        }
        <span class="self">self</span>.<span class="ident">info_panel</span> <span class="op">=</span> <span class="prelude-val">Some</span>(<span class="ident">panel</span>);
    }

    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">info_panel_open</span>(<span class="kw-2">&amp;</span><span class="self">self</span>, <span class="ident">app</span>: <span class="kw-2">&amp;</span><span class="ident">App</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="prelude-ty">Option</span><span class="op">&lt;</span><span class="ident">ID</span><span class="op">&gt;</span> {
        <span class="self">self</span>.<span class="ident">info_panel</span>.<span class="ident">as_ref</span>().<span class="ident">and_then</span>(<span class="op">|</span><span class="ident">i</span><span class="op">|</span> <span class="ident">i</span>.<span class="ident">active_id</span>(<span class="ident">app</span>))
    }

    <span class="doccomment">/// Allow toggling of dev mode and warping to an object by ID.</span>
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">debug_actions</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">app</span>: <span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="ident">App</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="prelude-ty">Option</span><span class="op">&lt;</span><span class="ident">Transition</span><span class="op">&gt;</span> {
        <span class="kw">if</span> <span class="ident">ctx</span>.<span class="ident">input</span>.<span class="ident">pressed</span>(<span class="ident">lctrl</span>(<span class="ident">Key::S</span>)) {
            <span class="ident">app</span>.<span class="ident">opts</span>.<span class="ident">dev</span> <span class="op">=</span> <span class="op">!</span><span class="ident">app</span>.<span class="ident">opts</span>.<span class="ident">dev</span>;
        }
        <span class="kw">if</span> <span class="ident">ctx</span>.<span class="ident">input</span>.<span class="ident">pressed</span>(<span class="ident">lctrl</span>(<span class="ident">Key::J</span>)) {
            <span class="kw">return</span> <span class="prelude-val">Some</span>(<span class="ident">Transition::Push</span>(<span class="ident">warp::DebugWarp::new_state</span>(<span class="ident">ctx</span>)));
        }
        <span class="prelude-val">None</span>
    }
}

<span class="comment">// TODO Kinda misnomer</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">tool_panel</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="op">-</span><span class="op">&gt;</span> <span class="ident">Panel</span> {
    <span class="ident">Panel::new_builder</span>(<span class="ident">Widget::row</span>(<span class="macro">vec!</span>[
        <span class="ident">ctx</span>.<span class="ident">style</span>()
            .<span class="ident">btn_plain</span>
            .<span class="ident">icon</span>(<span class="string">&quot;system/assets/tools/home.svg&quot;</span>)
            .<span class="ident">hotkey</span>(<span class="ident">Key::Escape</span>)
            .<span class="ident">build_widget</span>(<span class="ident">ctx</span>, <span class="string">&quot;back&quot;</span>),
        <span class="ident">ctx</span>.<span class="ident">style</span>()
            .<span class="ident">btn_plain</span>
            .<span class="ident">icon</span>(<span class="string">&quot;system/assets/tools/settings.svg&quot;</span>)
            .<span class="ident">build_widget</span>(<span class="ident">ctx</span>, <span class="string">&quot;settings&quot;</span>),
    ]))
    .<span class="ident">aligned</span>(<span class="ident">HorizontalAlignment::Left</span>, <span class="ident">VerticalAlignment::BottomAboveOSD</span>)
    .<span class="ident">build</span>(<span class="ident">ctx</span>)
}

<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">list_names</span><span class="op">&lt;</span><span class="ident">F</span>: <span class="ident">Fn</span>(<span class="ident">TextSpan</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">TextSpan</span><span class="op">&gt;</span>(<span class="ident">txt</span>: <span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="ident">Text</span>, <span class="ident">styler</span>: <span class="ident">F</span>, <span class="ident">names</span>: <span class="ident">BTreeSet</span><span class="op">&lt;</span><span class="ident">String</span><span class="op">&gt;</span>) {
    <span class="kw">let</span> <span class="ident">len</span> <span class="op">=</span> <span class="ident">names</span>.<span class="ident">len</span>();
    <span class="kw">for</span> (<span class="ident">idx</span>, <span class="ident">n</span>) <span class="kw">in</span> <span class="ident">names</span>.<span class="ident">into_iter</span>().<span class="ident">enumerate</span>() {
        <span class="kw">if</span> <span class="ident">idx</span> <span class="op">!</span><span class="op">=</span> <span class="number">0</span> {
            <span class="kw">if</span> <span class="ident">idx</span> <span class="op">=</span><span class="op">=</span> <span class="ident">len</span> <span class="op">-</span> <span class="number">1</span> {
                <span class="kw">if</span> <span class="ident">len</span> <span class="op">=</span><span class="op">=</span> <span class="number">2</span> {
                    <span class="ident">txt</span>.<span class="ident">append</span>(<span class="ident">Line</span>(<span class="string">&quot; and &quot;</span>));
                } <span class="kw">else</span> {
                    <span class="ident">txt</span>.<span class="ident">append</span>(<span class="ident">Line</span>(<span class="string">&quot;, and &quot;</span>));
                }
            } <span class="kw">else</span> {
                <span class="ident">txt</span>.<span class="ident">append</span>(<span class="ident">Line</span>(<span class="string">&quot;, &quot;</span>));
            }
        }
        <span class="ident">txt</span>.<span class="ident">append</span>(<span class="ident">styler</span>(<span class="ident">Line</span>(<span class="ident">n</span>)));
    }
}

<span class="comment">// Shorter is better</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">cmp_duration_shorter</span>(<span class="ident">app</span>: <span class="kw-2">&amp;</span><span class="ident">App</span>, <span class="ident">after</span>: <span class="ident">Duration</span>, <span class="ident">before</span>: <span class="ident">Duration</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">Vec</span><span class="op">&lt;</span><span class="ident">TextSpan</span><span class="op">&gt;</span> {
    <span class="kw">if</span> <span class="ident">after</span>.<span class="ident">epsilon_eq</span>(<span class="ident">before</span>) {
        <span class="macro">vec!</span>[<span class="ident">Line</span>(<span class="string">&quot;same&quot;</span>)]
    } <span class="kw">else</span> <span class="kw">if</span> <span class="ident">after</span> <span class="op">&lt;</span> <span class="ident">before</span> {
        <span class="macro">vec!</span>[
            <span class="ident">Line</span>((<span class="ident">before</span> <span class="op">-</span> <span class="ident">after</span>).<span class="ident">to_string</span>(<span class="kw-2">&amp;</span><span class="ident">app</span>.<span class="ident">opts</span>.<span class="ident">units</span>)).<span class="ident">fg</span>(<span class="ident">Color::GREEN</span>),
            <span class="ident">Line</span>(<span class="string">&quot; faster&quot;</span>),
        ]
    } <span class="kw">else</span> <span class="kw">if</span> <span class="ident">after</span> <span class="op">&gt;</span> <span class="ident">before</span> {
        <span class="macro">vec!</span>[
            <span class="ident">Line</span>((<span class="ident">after</span> <span class="op">-</span> <span class="ident">before</span>).<span class="ident">to_string</span>(<span class="kw-2">&amp;</span><span class="ident">app</span>.<span class="ident">opts</span>.<span class="ident">units</span>)).<span class="ident">fg</span>(<span class="ident">Color::RED</span>),
            <span class="ident">Line</span>(<span class="string">&quot; slower&quot;</span>),
        ]
    } <span class="kw">else</span> {
        <span class="macro">unreachable!</span>()
    }
}

<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">color_for_mode</span>(<span class="ident">app</span>: <span class="kw-2">&amp;</span><span class="ident">App</span>, <span class="ident">m</span>: <span class="ident">TripMode</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">Color</span> {
    <span class="kw">match</span> <span class="ident">m</span> {
        <span class="ident">TripMode::Walk</span> <span class="op">=</span><span class="op">&gt;</span> <span class="ident">app</span>.<span class="ident">cs</span>.<span class="ident">unzoomed_pedestrian</span>,
        <span class="ident">TripMode::Bike</span> <span class="op">=</span><span class="op">&gt;</span> <span class="ident">app</span>.<span class="ident">cs</span>.<span class="ident">unzoomed_bike</span>,
        <span class="ident">TripMode::Transit</span> <span class="op">=</span><span class="op">&gt;</span> <span class="ident">app</span>.<span class="ident">cs</span>.<span class="ident">unzoomed_bus</span>,
        <span class="ident">TripMode::Drive</span> <span class="op">=</span><span class="op">&gt;</span> <span class="ident">app</span>.<span class="ident">cs</span>.<span class="ident">unzoomed_car</span>,
    }
}

<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">color_for_agent_type</span>(<span class="ident">app</span>: <span class="kw-2">&amp;</span><span class="ident">App</span>, <span class="ident">a</span>: <span class="ident">AgentType</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">Color</span> {
    <span class="kw">match</span> <span class="ident">a</span> {
        <span class="ident">AgentType::Pedestrian</span> <span class="op">=</span><span class="op">&gt;</span> <span class="ident">app</span>.<span class="ident">cs</span>.<span class="ident">unzoomed_pedestrian</span>,
        <span class="ident">AgentType::Bike</span> <span class="op">=</span><span class="op">&gt;</span> <span class="ident">app</span>.<span class="ident">cs</span>.<span class="ident">unzoomed_bike</span>,
        <span class="ident">AgentType::Bus</span> <span class="op">|</span> <span class="ident">AgentType::Train</span> <span class="op">=</span><span class="op">&gt;</span> <span class="ident">app</span>.<span class="ident">cs</span>.<span class="ident">unzoomed_bus</span>,
        <span class="ident">AgentType::TransitRider</span> <span class="op">=</span><span class="op">&gt;</span> <span class="ident">app</span>.<span class="ident">cs</span>.<span class="ident">bus_trip</span>,
        <span class="ident">AgentType::Car</span> <span class="op">=</span><span class="op">&gt;</span> <span class="ident">app</span>.<span class="ident">cs</span>.<span class="ident">unzoomed_car</span>,
    }
}

<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">color_for_trip_phase</span>(<span class="ident">app</span>: <span class="kw-2">&amp;</span><span class="ident">App</span>, <span class="ident">tpt</span>: <span class="ident">TripPhaseType</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">Color</span> {
    <span class="kw">match</span> <span class="ident">tpt</span> {
        <span class="ident">TripPhaseType::Driving</span> <span class="op">=</span><span class="op">&gt;</span> <span class="ident">app</span>.<span class="ident">cs</span>.<span class="ident">unzoomed_car</span>,
        <span class="ident">TripPhaseType::Walking</span> <span class="op">=</span><span class="op">&gt;</span> <span class="ident">app</span>.<span class="ident">cs</span>.<span class="ident">unzoomed_pedestrian</span>,
        <span class="ident">TripPhaseType::Biking</span> <span class="op">=</span><span class="op">&gt;</span> <span class="ident">app</span>.<span class="ident">cs</span>.<span class="ident">bike_trip</span>,
        <span class="ident">TripPhaseType::Parking</span> <span class="op">=</span><span class="op">&gt;</span> <span class="ident">app</span>.<span class="ident">cs</span>.<span class="ident">parking_trip</span>,
        <span class="ident">TripPhaseType::WaitingForBus</span>(<span class="kw">_</span>, <span class="kw">_</span>) <span class="op">=</span><span class="op">&gt;</span> <span class="ident">app</span>.<span class="ident">cs</span>.<span class="ident">bus_layer</span>,
        <span class="ident">TripPhaseType::RidingBus</span>(<span class="kw">_</span>, <span class="kw">_</span>, <span class="kw">_</span>) <span class="op">=</span><span class="op">&gt;</span> <span class="ident">app</span>.<span class="ident">cs</span>.<span class="ident">bus_trip</span>,
        <span class="ident">TripPhaseType::Cancelled</span> <span class="op">|</span> <span class="ident">TripPhaseType::Finished</span> <span class="op">=</span><span class="op">&gt;</span> <span class="macro">unreachable!</span>(),
        <span class="ident">TripPhaseType::DelayedStart</span> <span class="op">=</span><span class="op">&gt;</span> <span class="ident">Color::YELLOW</span>,
    }
}

<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">intersections_from_roads</span>(<span class="ident">roads</span>: <span class="kw-2">&amp;</span><span class="ident">BTreeSet</span><span class="op">&lt;</span><span class="ident">RoadID</span><span class="op">&gt;</span>, <span class="ident">map</span>: <span class="kw-2">&amp;</span><span class="ident">Map</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">BTreeSet</span><span class="op">&lt;</span><span class="ident">IntersectionID</span><span class="op">&gt;</span> {
    <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">results</span> <span class="op">=</span> <span class="ident">BTreeSet::new</span>();
    <span class="kw">for</span> <span class="ident">r</span> <span class="kw">in</span> <span class="ident">roads</span> {
        <span class="kw">let</span> <span class="ident">r</span> <span class="op">=</span> <span class="ident">map</span>.<span class="ident">get_r</span>(<span class="kw-2">*</span><span class="ident">r</span>);
        <span class="kw">for</span> <span class="ident">i</span> <span class="kw">in</span> [<span class="ident">r</span>.<span class="ident">src_i</span>, <span class="ident">r</span>.<span class="ident">dst_i</span>] {
            <span class="kw">if</span> <span class="ident">results</span>.<span class="ident">contains</span>(<span class="kw-2">&amp;</span><span class="ident">i</span>) {
                <span class="kw">continue</span>;
            }
            <span class="kw">if</span> <span class="ident">map</span>.<span class="ident">get_i</span>(<span class="ident">i</span>).<span class="ident">roads</span>.<span class="ident">iter</span>().<span class="ident">all</span>(<span class="op">|</span><span class="ident">r</span><span class="op">|</span> <span class="ident">roads</span>.<span class="ident">contains</span>(<span class="ident">r</span>)) {
                <span class="ident">results</span>.<span class="ident">insert</span>(<span class="ident">i</span>);
            }
        }
    }
    <span class="ident">results</span>
}

<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">checkbox_per_mode</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">app</span>: <span class="kw-2">&amp;</span><span class="ident">App</span>,
    <span class="ident">current_state</span>: <span class="kw-2">&amp;</span><span class="ident">BTreeSet</span><span class="op">&lt;</span><span class="ident">TripMode</span><span class="op">&gt;</span>,
) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">Widget</span> {
    <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">filters</span> <span class="op">=</span> <span class="ident">Vec::new</span>();
    <span class="kw">for</span> <span class="ident">m</span> <span class="kw">in</span> <span class="ident">TripMode::all</span>() {
        <span class="ident">filters</span>.<span class="ident">push</span>(
            <span class="ident">Toggle::colored_checkbox</span>(
                <span class="ident">ctx</span>,
                <span class="ident">m</span>.<span class="ident">ongoing_verb</span>(),
                <span class="ident">color_for_mode</span>(<span class="ident">app</span>, <span class="ident">m</span>),
                <span class="ident">current_state</span>.<span class="ident">contains</span>(<span class="kw-2">&amp;</span><span class="ident">m</span>),
            )
            .<span class="ident">margin_right</span>(<span class="number">24</span>),
        );
    }
    <span class="ident">Widget::custom_row</span>(<span class="ident">filters</span>)
}

<span class="doccomment">/// If you want a simulation to start after midnight, pass the result of this to</span>
<span class="doccomment">/// `SandboxMode::async_new`. It&#39;s less visually overwhelming and more performant to continue with a</span>
<span class="doccomment">/// loading screen than launching the jump-to-time UI. After a deadline of 0.5s, we will switch</span>
<span class="doccomment">/// over to the jump-to-time UI so the user can cancel.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">jump_to_time_upon_startup</span>(
    <span class="ident">dt</span>: <span class="ident">Duration</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">FnOnce</span>(<span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="ident">EventCtx</span>, <span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="ident">App</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">Vec</span><span class="op">&lt;</span><span class="ident">Transition</span><span class="op">&gt;</span><span class="op">&gt;</span> {
    <span class="ident">Box::new</span>(<span class="kw">move</span> <span class="op">|</span><span class="ident">ctx</span>, <span class="ident">app</span><span class="op">|</span> {
        <span class="ident">ctx</span>.<span class="ident">loading_screen</span>(<span class="macro">format!</span>(<span class="string">&quot;jump forward {}&quot;</span>, <span class="ident">dt</span>), <span class="op">|</span><span class="ident">ctx</span>, <span class="kw">_</span><span class="op">|</span> {
            <span class="kw">let</span> <span class="ident">deadline</span> <span class="op">=</span> <span class="ident">Duration::seconds</span>(<span class="number">0.5</span>);
            <span class="ident">app</span>.<span class="ident">primary</span>
                .<span class="ident">sim</span>
                .<span class="ident">time_limited_step</span>(<span class="kw-2">&amp;</span><span class="ident">app</span>.<span class="ident">primary</span>.<span class="ident">map</span>, <span class="ident">dt</span>, <span class="ident">deadline</span>, <span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="prelude-val">None</span>);
            <span class="kw">let</span> <span class="ident">target</span> <span class="op">=</span> <span class="ident">Time::START_OF_DAY</span> <span class="op">+</span> <span class="ident">dt</span>;
            <span class="kw">if</span> <span class="ident">app</span>.<span class="ident">primary</span>.<span class="ident">sim</span>.<span class="ident">time</span>() <span class="op">!</span><span class="op">=</span> <span class="ident">target</span> {
                <span class="macro">vec!</span>[<span class="ident">Transition::Push</span>(<span class="ident">TimeWarpScreen::new_state</span>(
                    <span class="ident">ctx</span>, <span class="ident">app</span>, <span class="ident">target</span>, <span class="prelude-val">None</span>,
                ))]
            } <span class="kw">else</span> {
                <span class="macro">vec!</span>[<span class="ident">Transition::Keep</span>]
            }
        })
    })
}
</pre></div>
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