Merge pull request #1405 from Hixie/dynamic-routes

Dynamic named routes

examples/stocks/lib/main.dart

@@ -22,6 +22,7 @@ part 'stock_list.dart';
 part 'stock_menu.dart';
 part 'stock_row.dart';
 part 'stock_settings.dart';
+part 'stock_symbol_viewer.dart';
 part 'stock_types.dart';
 
 class StocksApp extends StatefulComponent {
@@ -30,13 +31,14 @@ class StocksApp extends StatefulComponent {
 
 class StocksAppState extends State<StocksApp> {
 
-  final List<Stock> _stocks = [];
+  final Map<String, Stock> _stocks = <String, Stock>{};
+  final List<String> _symbols = <String>[];
 
   void initState(BuildContext context) {
     super.initState(context);
     new StockDataFetcher((StockData data) {
       setState(() {
-        data.appendTo(_stocks);
+        data.appendTo(_stocks, _symbols);
       });
     });
   }
@@ -72,14 +74,29 @@ class StocksAppState extends State<StocksApp> {
     }
   }
 
+  RouteBuilder _getRoute(String name) {
+    List<String> path = name.split('/');
+    if (path[0] != '')
+      return null;
+    if (path[1] == 'stock') {
+      if (path.length != 3)
+        return null;
+      if (_stocks.containsKey(path[2]))
+        return (navigator, route) => new StockSymbolViewer(navigator, _stocks[path[2]]);
+      return null;
+    }
+    return null;
+  }
+
   Widget build(BuildContext context) {
     return new App(
       title: 'Stocks',
       theme: theme,
       routes: <String, RouteBuilder>{
-         '/':         (navigator, route) => new StockHome(navigator, _stocks, _optimismSetting, modeUpdater),
+         '/':         (navigator, route) => new StockHome(navigator, _stocks, _symbols, _optimismSetting, modeUpdater),
          '/settings': (navigator, route) => new StockSettings(navigator, _optimismSetting, _backupSetting, settingsUpdater)
-      }
+      },
+      onGenerateRoute: _getRoute
     );
   }
 }

examples/stocks/lib/stock_data.dart

@@ -42,9 +42,13 @@ class StockData {
 
   StockData(this._data);
 
-  void appendTo(List<Stock> stocks) {
-    for (List<String> fields in _data)
-      stocks.add(new Stock.fromFields(fields));
+  void appendTo(Map<String, Stock> stocks, List<String> symbols) {
+    for (List<String> fields in _data) {
+      Stock stock = new Stock.fromFields(fields);
+      symbols.add(stock.symbol);
+      stocks[stock.symbol] = stock;
+    }
+    symbols.sort();
   }
 }
 

examples/stocks/lib/stock_home.dart

@@ -9,10 +9,11 @@ typedef void ModeUpdater(StockMode mode);
 const Duration _kSnackbarSlideDuration = const Duration(milliseconds: 200);
 
 class StockHome extends StatefulComponent {
-  StockHome(this.navigator, this.stocks, this.stockMode, this.modeUpdater);
+  StockHome(this.navigator, this.stocks, this.symbols, this.stockMode, this.modeUpdater);
 
   final NavigatorState navigator;
-  final List<Stock> stocks;
+  final Map<String, Stock> stocks;
+  final List<String> symbols;
   final StockMode stockMode;
   final ModeUpdater modeUpdater;
 
@@ -170,10 +171,9 @@ class StockHomeState extends State<StockHome> {
   }
 
   int selectedTabIndex = 0;
-  List<String> portfolioSymbols = ["AAPL","FIZZ", "FIVE", "FLAT", "ZINC", "ZNGA"];
 
-  Iterable<Stock> _filterByPortfolio(Iterable<Stock> stocks) {
-    return stocks.where((stock) => portfolioSymbols.contains(stock.symbol));
+  Iterable<Stock> _getStockList(Iterable<String> symbols) {
+    return symbols.map((symbol) => config.stocks[symbol]);
   }
 
   Iterable<Stock> _filterBySearchQuery(Iterable<Stock> stocks) {
@@ -191,20 +191,25 @@ class StockHomeState extends State<StockHome> {
           stock.percentChange = 100.0 * (1.0 / stock.lastSale);
           stock.lastSale += 1.0;
         });
+      },
+      onOpen: (Stock stock) {
+        config.navigator.pushNamed('/stock/${stock.symbol}');
       }
     );
   }
 
+  static const List<String> portfolioSymbols = const <String>["AAPL","FIZZ", "FIVE", "FLAT", "ZINC", "ZNGA"];
+
   Widget buildTabNavigator() {
     return new TabNavigator(
       views: <TabNavigatorView>[
         new TabNavigatorView(
           label: const TabLabel(text: 'MARKET'),
-          builder: (BuildContext context) => buildStockList(context, _filterBySearchQuery(config.stocks))
+          builder: (BuildContext context) => buildStockList(context, _filterBySearchQuery(_getStockList(config.symbols)).toList())
         ),
         new TabNavigatorView(
           label: const TabLabel(text: 'PORTFOLIO'),
-          builder: (BuildContext context) => buildStockList(context, _filterByPortfolio(config.stocks))
+          builder: (BuildContext context) => buildStockList(context, _filterBySearchQuery(_getStockList(portfolioSymbols)).toList())
         )
       ],
       selectedIndex: selectedTabIndex,

examples/stocks/lib/stock_list.dart

@@ -7,10 +7,11 @@ part of stocks;
 typedef void StockActionListener(Stock stock);
 
 class StockList extends StatelessComponent {
-  StockList({ Key key, this.stocks, this.onAction }) : super(key: key);
+  StockList({ Key key, this.stocks, this.onAction, this.onOpen }) : super(key: key);
 
   final List<Stock> stocks;
   final StockActionListener onAction;
+  final StockActionListener onOpen;
 
   Widget build(BuildContext context) {
     return new Material(
@@ -21,7 +22,8 @@ class StockList extends StatelessComponent {
         itemBuilder: (BuildContext context, Stock stock) {
           return new StockRow(
             stock: stock,
-            onPressed: () { onAction(stock); }
+            onPressed: () { onAction(stock); },
+            onLongPressed: () { onOpen(stock); }
           );
         }
       )

examples/stocks/lib/stock_row.dart

@@ -5,10 +5,15 @@
 part of stocks;
 
 class StockRow extends StatelessComponent {
-  StockRow({ Stock stock, this.onPressed }) : this.stock = stock, super(key: new Key(stock.symbol));
+  StockRow({
+    Stock stock,
+    this.onPressed,
+    this.onLongPressed
+  }) : this.stock = stock, super(key: new Key(stock.symbol));
 
   final Stock stock;
   final GestureTapListener onPressed;
+  final GestureLongPressListener onLongPressed;
 
   static const double kHeight = 79.0;
 
@@ -39,6 +44,7 @@ class StockRow extends StatelessComponent {
 
     return new GestureDetector(
       onTap: onPressed,
+      onLongPress: onLongPressed,
       child: new InkWell(
         child: new Container(
           padding: const EdgeDims(16.0, 16.0, 20.0, 16.0),

examples/stocks/lib/stock_symbol_viewer.dart

+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+part of stocks;
+
+class StockSymbolViewer extends StatefulComponent {
+  StockSymbolViewer(this.navigator, this.stock);
+
+  final NavigatorState navigator;
+  final Stock stock;
+
+  StockSymbolViewerState createState() => new StockSymbolViewerState();
+}
+
+class StockSymbolViewerState extends State<StockSymbolViewer> {
+
+  Widget build(BuildContext context) {
+
+    String lastSale = "\$${config.stock.lastSale.toStringAsFixed(2)}";
+
+    String changeInPrice = "${config.stock.percentChange.toStringAsFixed(2)}%";
+    if (config.stock.percentChange > 0) changeInPrice = "+" + changeInPrice;
+
+    TextStyle headings = Theme.of(context).text.body2;
+
+    return new Scaffold(
+      toolbar: new ToolBar(
+        left: new IconButton(
+          icon: 'navigation/arrow_back',
+          onPressed: config.navigator.pop
+        ),
+        center: new Text('${config.stock.name} (${config.stock.symbol})')
+      ),
+      body: new Material(
+        type: MaterialType.canvas,
+        child: new Block([
+          new Container(
+            padding: new EdgeDims.all(20.0),
+            child: new Column([
+                new Text('Last Sale', style: headings),
+                new Text('${lastSale} (${changeInPrice})'),
+                new Container(
+                  height: 8.0
+                ),
+                new Text('Market Cap', style: headings),
+                new Text('${config.stock.marketCap}'),
+              ],
+              alignItems: FlexAlignItems.stretch
+            )
+          )
+        ])
+      )
+    );
+  }
+
+}

packages/flutter/lib/src/fn3/app.dart

@@ -30,12 +30,14 @@ class App extends StatefulComponent {
     Key key,
     this.title,
     this.theme,
-    this.routes
+    this.routes,
+    this.onGenerateRoute
   }): super(key: key);
 
   final String title;
   final ThemeData theme;
   final Map<String, RouteBuilder> routes;
+  final RouteGenerator onGenerateRoute;
 
   AppState createState() => new AppState();
 }
@@ -76,7 +78,8 @@ class AppState extends State<App> {
           title: config.title,
           child: new Navigator(
             key: _navigator,
-            routes: config.routes
+            routes: config.routes,
+            onGenerateRoute: config.onGenerateRoute
           )
         )
       )

packages/flutter/lib/src/fn3/material.dart

@@ -62,7 +62,9 @@ class Material extends StatelessComponent {
       }
     }
     // TODO(abarth): This should use AnimatedContainer.
-    return new Container(
+    return new DefaultTextStyle(
+      style: Theme.of(context).text.body1,
+      child: new Container(
         decoration: new BoxDecoration(
           backgroundColor: getBackgroundColor(context),
           borderRadius: edges[type],
@@ -70,6 +72,7 @@ class Material extends StatelessComponent {
           shape: type == MaterialType.circle ? Shape.circle : Shape.rectangle
         ),
         child: contents
+      )
     );
   }
 }

packages/flutter/lib/src/fn3/navigator.dart

@@ -9,15 +9,24 @@ import 'package:sky/src/fn3/framework.dart';
 import 'package:sky/src/fn3/transitions.dart';
 
 typedef Widget RouteBuilder(NavigatorState navigator, Route route);
+typedef RouteBuilder RouteGenerator(String name);
+typedef void RouteStateCallback(RouteState route);
 typedef void NotificationCallback();
 
 class Navigator extends StatefulComponent {
-  Navigator({ this.routes, Key key }) : super(key: key) {
+  Navigator({
+    Key key,
+    this.routes,
+    this.onGenerateRoute, // you need to implement this if you pushNamed() to names that might not be in routes.
+    this.onUnknownRoute // 404 generator. You only need to implement this if you have a way to navigate to arbitrary names.
+  }) : super(key: key) {
     // To use a navigator, you must at a minimum define the route with the name '/'.
     assert(routes.containsKey('/'));
   }
 
   final Map<String, RouteBuilder> routes;
+  final RouteGenerator onGenerateRoute;
+  final RouteBuilder onUnknownRoute;
 
   NavigatorState createState() => new NavigatorState();
 }
@@ -47,9 +56,17 @@ class NavigatorState extends State<Navigator> {
   }
 
   void pushNamed(String name) {
-    PageRoute route = new PageRoute(config.routes[name]);
-    assert(route != null);
-    push(route);
+    RouteBuilder builder;
+    if (!config.routes.containsKey(name)) {
+      assert(config.onGenerateRoute != null);
+      builder = config.onGenerateRoute(name);
+    } else {
+      builder = config.routes[name];
+    }
+    if (builder == null)
+      builder = config.onUnknownRoute; // 404!
+    assert(builder != null); // 404 getting your 404!
+    push(new PageRoute(builder));
   }
 
   void push(Route route) {
@@ -172,6 +189,10 @@ abstract class Route {
   /// NavigatorState.pushState().
   /// 
   /// Set hasContent to false if you have nothing useful to return from build().
+  ///
+  /// modal must be false if hasContent is false, since otherwise any
+  /// interaction with the system at all would imply that the current route is
+  /// popped, which would be pointless.
   bool get hasContent => true;
 
   /// If ephemeral is true, then to explicitly pop the route you have to use
@@ -196,6 +217,7 @@ abstract class Route {
   /// popped.
   ///
   /// ephemeral must be true if modal is false.
+  /// hasContent must be true if modal is true.
   bool get modal => true;
 
   /// If opaque is true, then routes below this one will not be built or painted
@@ -253,8 +275,6 @@ class PageRoute extends Route {
   }
 }
 
-typedef void RouteStateCallback(RouteState route);
-
 class RouteState extends Route {
   RouteState({ this.route, this.owner, this.callback });
 
@@ -262,6 +282,8 @@ class RouteState extends Route {
   State owner;
   RouteStateCallback callback;
 
+  bool get hasContent => false;
+  bool get modal => false;
   bool get opaque => false;
 
   void didPop([dynamic result]) {
@@ -271,6 +293,5 @@ class RouteState extends Route {
     super.didPop(result);
   }
 
-  bool get hasContent => false;
   Widget build(Key key, NavigatorState navigator) => null;
 }

packages/flutter/lib/src/fn3/popup_menu.dart

@@ -167,7 +167,7 @@ class MenuRoute extends Route {
     return result;
   }
 
-  bool get ephemeral => true;
+  bool get ephemeral => false; // we could make this true, but then we'd have to use popRoute(), not pop(), in menus
   bool get modal => true;
 
   Duration get transitionDuration => _kMenuDuration;