From b076165e0b3a8c981da403ce1f344c54eb8df5d6 Mon Sep 17 00:00:00 2001
From: Michael Kirk <michael.code@endoftheworl.de>
Date: Sat, 21 Nov 2020 12:23:37 -0800
Subject: [PATCH] Mkirk/switch buildings (#397)

for #393
---
 game/src/devtools/fifteen_min/mod.rs | 78 ++++++++++++++++++----------
 1 file changed, 51 insertions(+), 27 deletions(-)

diff --git a/game/src/devtools/fifteen_min/mod.rs b/game/src/devtools/fifteen_min/mod.rs
index 7f501c2275..b3c5ca1648 100644
--- a/game/src/devtools/fifteen_min/mod.rs
+++ b/game/src/devtools/fifteen_min/mod.rs
@@ -6,7 +6,8 @@
 
 use rand::seq::SliceRandom;
 
-use map_model::BuildingID;
+use geom::Pt2D;
+use map_model::{Building, BuildingID};
 use widgetry::{
     Btn, Color, Drawable, EventCtx, GeomBatch, GfxCtx, HorizontalAlignment, Line, Outcome, Panel,
     RewriteColor, State, Text, VerticalAlignment, Widget,
@@ -15,6 +16,7 @@ use widgetry::{
 use self::isochrone::Isochrone;
 use crate::app::App;
 use crate::game::Transition;
+use crate::helpers::ID;
 
 mod isochrone;
 
@@ -36,45 +38,39 @@ impl Viewer {
     pub fn new(ctx: &mut EventCtx, app: &App, start: BuildingID) -> Box<dyn State<App>> {
         let start = app.primary.map.get_b(start);
         let isochrone = Isochrone::new(ctx, app, start.id);
-
-        let mut rows = Vec::new();
-        rows.push(Widget::row(vec![
-            Line("15-minute neighborhood explorer")
-                .small_heading()
-                .draw(ctx),
-            Btn::close(ctx),
-        ]));
-        let mut txt = Text::from_all(vec![
-            Line("Starting from: ").secondary(),
-            Line(&start.address),
-        ]);
-        for (amenity, buildings) in isochrone.amenities_reachable.borrow() {
-            txt.add(Line(format!("{}: {}", amenity, buildings.len())));
-        }
-        rows.push(txt.draw(ctx));
-
-        let panel = Panel::new(Widget::col(rows))
-            .aligned(HorizontalAlignment::Center, VerticalAlignment::Top)
-            .build(ctx);
-
         // Draw a star on the start building.
-        let highlight_start = GeomBatch::load_svg(ctx.prerender, "system/assets/tools/star.svg")
-            .centered_on(start.polygon.center())
-            .color(RewriteColor::ChangeAll(Color::YELLOW));
+        let highlight_start_batch = draw_star(ctx, start.polygon.center());
+        let highlight_start = ctx.upload(highlight_start_batch);
+        let panel = build_panel(ctx, start, &isochrone);
 
         Box::new(Viewer {
             panel,
-            highlight_start: ctx.upload(highlight_start),
+            highlight_start: highlight_start,
             isochrone,
         })
     }
 }
 
 impl State<App> for Viewer {
-    fn event(&mut self, ctx: &mut EventCtx, _: &mut App) -> Transition {
+    fn event(&mut self, ctx: &mut EventCtx, app: &mut App) -> Transition {
         // Allow panning and zooming
         ctx.canvas_movement();
 
+        if ctx.input.left_mouse_button_pressed() {
+            if let Some(ID::Building(start)) = app.mouseover_unzoomed_buildings(ctx) {
+                let start = app.primary.map.get_b(start);
+                let isochrone = Isochrone::new(ctx, app, start.id);
+                // Draw a star on the start building.
+                let highlight_start_batch = draw_star(ctx, start.polygon.center());
+                let highlight_start = ctx.upload(highlight_start_batch);
+                let panel = build_panel(ctx, start, &isochrone);
+
+                self.highlight_start = highlight_start;
+                self.panel = panel;
+                self.isochrone = isochrone;
+            }
+        }
+
         match self.panel.event(ctx) {
             Outcome::Clicked(x) => match x.as_ref() {
                 "close" => {
@@ -94,3 +90,31 @@ impl State<App> for Viewer {
         self.panel.draw(g);
     }
 }
+
+fn draw_star(ctx: &mut EventCtx, center: Pt2D) -> GeomBatch {
+    GeomBatch::load_svg(ctx.prerender, "system/assets/tools/star.svg")
+        .centered_on(center)
+        .color(RewriteColor::ChangeAll(Color::BLACK))
+}
+
+fn build_panel(ctx: &mut EventCtx, start: &Building, isochrone: &Isochrone) -> Panel {
+    let mut rows = Vec::new();
+    rows.push(Widget::row(vec![
+        Line("15-minute neighborhood explorer")
+            .small_heading()
+            .draw(ctx),
+        Btn::close(ctx),
+    ]));
+    let mut txt = Text::from_all(vec![
+        Line("Starting from: ").secondary(),
+        Line(&start.address),
+    ]);
+    for (amenity, buildings) in isochrone.amenities_reachable.borrow() {
+        txt.add(Line(format!("{}: {}", amenity, buildings.len())));
+    }
+    rows.push(txt.draw(ctx));
+
+    Panel::new(Widget::col(rows))
+        .aligned(HorizontalAlignment::Center, VerticalAlignment::Top)
+        .build(ctx)
+}