Add basic measurement functionality to fitness app

sky/sdk/example/fitness/lib/home.dart

@@ -4,6 +4,9 @@
 
 import 'package:sky/painting/text_style.dart';
 import 'package:sky/widgets/basic.dart';
+import 'package:sky/widgets/card.dart';
+import 'package:sky/widgets/default_text_style.dart';
+import 'package:sky/widgets/dismissable.dart';
 import 'package:sky/widgets/drawer.dart';
 import 'package:sky/widgets/drawer_divider.dart';
 import 'package:sky/widgets/drawer_header.dart';
@@ -11,9 +14,11 @@ import 'package:sky/widgets/drawer_item.dart';
 import 'package:sky/widgets/floating_action_button.dart';
 import 'package:sky/widgets/icon_button.dart';
 import 'package:sky/widgets/icon.dart';
+import 'package:sky/widgets/ink_well.dart';
 import 'package:sky/widgets/material.dart';
 import 'package:sky/widgets/navigator.dart';
 import 'package:sky/widgets/scaffold.dart';
+import 'package:sky/widgets/scrollable_list.dart';
 import 'package:sky/widgets/snack_bar.dart';
 import 'package:sky/widgets/theme.dart';
 import 'package:sky/widgets/tool_bar.dart';
@@ -22,12 +27,79 @@ import 'package:sky/widgets/widget.dart';
 import 'fitness_types.dart';
 import 'measurement.dart';
 
+class MeasurementList extends Component {
+  MeasurementList({ String key, this.measurements, this.onDismissed }) : super(key: key);
+
+  final List<Measurement> measurements;
+  final MeasurementHandler onDismissed;
+
+  Widget build() {
+    return new Material(
+      type: MaterialType.canvas,
+      child: new ScrollableList<Measurement>(
+        items: measurements,
+        itemHeight: MeasurementRow.kHeight,
+        itemBuilder: (measurement) => new MeasurementRow(
+          measurement: measurement,
+          onDismissed: onDismissed
+        )
+      )
+    );
+  }
+}
+
+class MeasurementRow extends Component {
+
+  MeasurementRow({ Measurement measurement, this.onDismissed }) : this.measurement = measurement, super(key: measurement.when.toString());
+
+  final Measurement measurement;
+  final MeasurementHandler onDismissed;
+
+  static const double kHeight = 79.0;
+
+  Widget build() {
+
+    List<Widget> children = [
+      new Flexible(
+        child: new Text(
+          measurement.displayWeight,
+          style: const TextStyle(textAlign: TextAlign.right)
+        )
+      ),
+      new Flexible(
+        child: new Text(
+          measurement.displayDate,
+          style: Theme.of(this).text.caption.copyWith(textAlign: TextAlign.right)
+        )
+      )
+    ];
+
+    return new Dismissable(
+      key: measurement.when.toString(),
+      onDismissed: () => onDismissed(measurement),
+      child: new Card(
+        child: new Container(
+          height: kHeight,
+          padding: const EdgeDims.all(8.0),
+          child: new Flex(
+            children,
+            alignItems: FlexAlignItems.baseline,
+            textBaseline: DefaultTextStyle.of(this).textBaseline
+          )
+        )
+      )
+    );
+  }
+}
+
 class HomeFragment extends StatefulComponent {
 
-  HomeFragment(this.navigator, this.userData);
+  HomeFragment({ this.navigator, this.userData, this.onMeasurementCreated, this.onMeasurementDeleted });
 
   Navigator navigator;
   List<Measurement> userData;
+  MeasurementHandler onMeasurementCreated;
+  MeasurementHandler onMeasurementDeleted;
 
   FitnessMode _fitnessMode = FitnessMode.measure;
 
@@ -40,6 +112,8 @@ class HomeFragment extends StatefulComponent {
   void syncFields(HomeFragment source) {
     navigator = source.navigator;
     userData = source.userData;
+    onMeasurementCreated = source.onMeasurementCreated;
+    onMeasurementDeleted = source.onMeasurementDeleted;
   }
 
   bool _isShowingSnackBar = false;
@@ -121,10 +195,26 @@ class HomeFragment extends StatefulComponent {
     );
   }
 
+  // TODO(jackson): Pull from file
+  Measurement _undoMeasurement;
+
+  void _handleMeasurementDismissed(Measurement measurement) {
+    onMeasurementDeleted(measurement);
+    setState(() {
+      _undoMeasurement = measurement;
+      _isShowingSnackBar = true;
+    });
+  }
+
   Widget buildBody() {
     TextStyle style = Theme.of(this).text.title;
     switch (_fitnessMode) {
       case FitnessMode.measure:
+        if (userData.length > 0)
+          return new MeasurementList(
+            measurements: userData,
+            onDismissed: _handleMeasurementDismissed
+          );
         return new Material(
           type: MaterialType.canvas,
           child: new Flex(
@@ -143,7 +233,9 @@ class HomeFragment extends StatefulComponent {
   }
 
   void _handleUndo() {
+    onMeasurementCreated(_undoMeasurement);
     setState(() {
+      _undoMeasurement = null;
       _isShowingSnackBar = false;
     });
   }
@@ -152,17 +244,11 @@ class HomeFragment extends StatefulComponent {
     if (!_isShowingSnackBar)
       return null;
     return new SnackBar(
-      content: new Text("Measurement added!"),
+      content: new Text("Measurement deleted."),
       actions: [new SnackBarAction(label: "UNDO", onPressed: _handleUndo)]
     );
   }
 
-  void _handleMeasurementAdded() {
-    setState(() {
-      _isShowingSnackBar = true;
-    });
-  }
-
   void _handleRunStarted() {
     setState(() {
       _isRunning = true;
@@ -180,7 +266,7 @@ class HomeFragment extends StatefulComponent {
       case FitnessMode.measure:
         return new FloatingActionButton(
           child: new Icon(type: 'content/add', size: 24),
-          onPressed: _handleMeasurementAdded
+          onPressed: () => navigator.pushNamed("/measurements/new")
         );
       case FitnessMode.run:
         return new FloatingActionButton(

sky/sdk/example/fitness/lib/main.dart

@@ -22,7 +22,19 @@ class FitnessApp extends App {
     _navigationState = new NavigationState([
       new Route(
         name: '/',
-        builder: (navigator, route) => new HomeFragment(navigator, _userData)
+        builder: (navigator, route) => new HomeFragment(
+          navigator: navigator,
+          userData: _userData,
+          onMeasurementCreated: _handleMeasurementCreated,
+          onMeasurementDeleted: _handleMeasurementDeleted
+        )
+      ),
+      new Route(
+        name: '/measurements/new',
+        builder: (navigator, route) => new MeasurementFragment(
+          navigator: navigator,
+          onCreated: _handleMeasurementCreated
+        )
       ),
       new Route(
         name: '/settings',
@@ -42,6 +54,19 @@ class FitnessApp extends App {
     }
   }
 
+  void _handleMeasurementCreated(Measurement measurement) {
+    setState(() {
+      _userData.add(measurement);
+      _userData.sort((a, b) => a.when.compareTo(b.when));
+    });
+  }
+
+  void _handleMeasurementDeleted(Measurement measurement) {
+    setState(() {
+      _userData.remove(measurement);
+    });
+  }
+
   BackupMode backupSetting = BackupMode.disabled;
 
   void settingsUpdater({ BackupMode backup }) {
@@ -52,7 +77,8 @@ class FitnessApp extends App {
   }
 
   final List<Measurement> _userData = [
-    new Measurement(when: new DateTime.now(), weight: 400.0)
+    new Measurement(weight: 180.0, when: new DateTime.now().add(const Duration(days: -1))),
+    new Measurement(weight: 160.0, when: new DateTime.now()),
   ];
 
   Widget build() {

sky/sdk/example/fitness/lib/measurement.dart

@@ -2,10 +2,112 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+import 'package:sky/editing/input.dart';
+import 'package:sky/widgets/basic.dart';
+import 'package:sky/widgets/flat_button.dart';
+import 'package:sky/widgets/icon_button.dart';
+import 'package:sky/widgets/ink_well.dart';
+import 'package:sky/widgets/material.dart';
+import 'package:sky/widgets/navigator.dart';
+import 'package:sky/widgets/scaffold.dart';
+import 'package:sky/widgets/scrollable_viewport.dart';
+import 'package:sky/widgets/snack_bar.dart';
+import 'package:sky/widgets/tool_bar.dart';
+
+typedef void MeasurementHandler(Measurement measurement);
+
 class Measurement {
+  Measurement({ this.when, this.weight });
+
   final DateTime when;
   final double weight;
 
-  Measurement({ this.when, this.weight });
+  // TODO(jackson): Internationalize
+  String get displayWeight => "${weight.toStringAsFixed(2)} lbs";
+  String get displayDate => "${when.year.toString()}-${when.month.toString().padLeft(2,'0')}-${when.day.toString().padLeft(2,'0')}";
 }
 
+class MeasurementFragment extends StatefulComponent {
+
+  MeasurementFragment({ this.navigator, this.onCreated });
+
+  Navigator navigator;
+  MeasurementHandler onCreated;
+
+  void syncFields(MeasurementFragment source) {
+    navigator = source.navigator;
+    onCreated = source.onCreated;
+  }
+
+  String _weight = "";
+  String _errorMessage = null;
+
+  void _handleSave() {
+    double parsedWeight;
+    try {
+      parsedWeight = double.parse(_weight);
+    } on FormatException {
+      setState(() {
+        _errorMessage = "Save failed";
+      });
+      return;
+    }
+    onCreated(new Measurement(when: new DateTime.now(), weight: parsedWeight));
+    navigator.pop();
+  }
+
+  Widget buildToolBar() {
+    return new ToolBar(
+      left: new IconButton(
+        icon: "navigation/close",
+        onPressed: navigator.pop),
+      center: new Text('New Measurement'),
+      right: [new InkWell(
+        child: new Listener(
+          onGestureTap: (_) => _handleSave(),
+          child: new Text('SAVE')
+        )
+      )]
+    );
+  }
+
+  void _handleWeightChanged(String weight) {
+    setState(() {
+      _weight = weight;
+    });
+  }
+
+  Widget buildMeasurementPane() {
+    Measurement measurement = new Measurement(when: new DateTime.now());
+    return new Material(
+      type: MaterialType.canvas,
+      child: new ScrollableViewport(
+        child: new Container(
+          padding: const EdgeDims.all(20.0),
+          child: new Block([
+            new Text(measurement.displayDate),
+            new Input(
+              focused: false,
+              placeholder: 'Enter weight',
+              onChanged: _handleWeightChanged
+            ),
+          ])
+        )
+      )
+    );
+  }
+
+  Widget buildSnackBar() {
+    if (_errorMessage == null)
+      return null;
+    return new SnackBar(content: new Text(_errorMessage));
+  }
+
+  Widget build() {
+    return new Scaffold(
+      toolbar: buildToolBar(),
+      body: buildMeasurementPane(),
+      snackBar: buildSnackBar()
+    );
+  }
+}

sky/sdk/lib/widgets/snack_bar.dart

@@ -53,7 +53,9 @@ class SnackBar extends Component {
           )
         )
       )
-    ]..addAll(actions);
+    ];
+    if (actions != null)
+      children.addAll(actions);
     return new Material(
       level: 2,
       color: const Color(0xFF323232),

sky/sdk/lib/widgets/tool_bar.dart

@@ -31,12 +31,14 @@ class ToolBar extends Component {
   Widget build() {
     Color toolbarColor = backgroundColor;
     IconThemeData iconThemeData;
-    TextStyle defaultTextStyle = typography.white.title;
+    TextStyle centerStyle = typography.white.title;
+    TextStyle sideStyle = typography.white.body1;
     if (toolbarColor == null) {
       ThemeData themeData = Theme.of(this);
       toolbarColor = themeData.primaryColor;
       if (themeData.primaryColorBrightness == ThemeBrightness.light) {
-        defaultTextStyle = typography.black.title;
+        centerStyle = typography.black.title;
+        sideStyle = typography.black.body2;
         iconThemeData = const IconThemeData(color: IconThemeColor.black);
       } else {
         iconThemeData = const IconThemeData(color: IconThemeColor.white);
@@ -50,7 +52,7 @@ class ToolBar extends Component {
     children.add(
       new Flexible(
         child: new Padding(
-          child: center,
+          child: new DefaultTextStyle(child: center, style: centerStyle),
           padding: new EdgeDims.only(left: 24.0)
         )
       )
@@ -61,7 +63,7 @@ class ToolBar extends Component {
 
     Widget content = new Container(
       child: new DefaultTextStyle(
-        style: defaultTextStyle,
+        style: sideStyle,
         child: new Flex(
           [new Container(child: new Flex(children), height: kToolBarHeight)],
           alignItems: FlexAlignItems.end