Run `dartfmt` on a few of the gallery example files (#6260)

examples/flutter_gallery/lib/demo/bottom_navigation_demo.dart

@@ -15,7 +15,7 @@ class NavigationIconView {
        destinationLabel = new DestinationLabel(
          icon: icon,
          title: title,
-         backgroundColor: color
+         backgroundColor: color,
        ),
        controller = new AnimationController(
          duration: kThemeAnimationDuration,
@@ -23,7 +23,7 @@ class NavigationIconView {
        ) {
     _animation = new CurvedAnimation(
       parent: controller,
-      curve: new Interval(0.5, 1.0, curve: Curves.fastOutSlowIn)
+      curve: new Interval(0.5, 1.0, curve: Curves.fastOutSlowIn),
     );
   }
 
@@ -39,8 +39,9 @@ class NavigationIconView {
       iconColor = _color;
     } else {
       final ThemeData themeData = Theme.of(context);
-      iconColor = themeData.brightness == Brightness.light ?
-          themeData.primaryColor : themeData.accentColor;
+      iconColor = themeData.brightness == Brightness.light
+          ? themeData.primaryColor
+          : themeData.accentColor;
     }
 
     return new FadeTransition(
@@ -48,10 +49,10 @@ class NavigationIconView {
       child: new SlideTransition(
         position: new Tween<FractionalOffset>(
           begin: const FractionalOffset(0.0, 0.02), // Small offset from the top.
-          end: FractionalOffset.topLeft
+          end: FractionalOffset.topLeft,
         ).animate(_animation),
-        child: new Icon(_icon.icon, color: iconColor, size: 120.0)
-      )
+        child: new Icon(_icon.icon, color: iconColor, size: 120.0),
+      ),
     );
   }
 }
@@ -63,7 +64,8 @@ class BottomNavigationDemo extends StatefulWidget {
   _BottomNavigationDemoState createState() => new _BottomNavigationDemoState();
 }
 
-class _BottomNavigationDemoState extends State<BottomNavigationDemo> with TickerProviderStateMixin {
+class _BottomNavigationDemoState extends State<BottomNavigationDemo>
+    with TickerProviderStateMixin {
   int _currentIndex = 0;
   BottomNavigationBarType _type = BottomNavigationBarType.shifting;
   List<NavigationIconView> _navigationViews;
@@ -136,9 +138,9 @@ class _BottomNavigationDemoState extends State<BottomNavigationDemo> with Ticker
   @override
   Widget build(BuildContext context) {
     final BottomNavigationBar botNavBar = new BottomNavigationBar(
-      labels: _navigationViews.map(
-        (NavigationIconView navigationView) => navigationView.destinationLabel
-      ).toList(),
+      labels: _navigationViews
+          .map((NavigationIconView navigationView) => navigationView.destinationLabel)
+          .toList(),
       currentIndex: _currentIndex,
       type: _type,
       onTap: (int index) {
@@ -147,7 +149,7 @@ class _BottomNavigationDemoState extends State<BottomNavigationDemo> with Ticker
           _currentIndex = index;
           _navigationViews[_currentIndex].controller.forward();
         });
-      }
+      },
     );
 
     return new Scaffold(
@@ -169,9 +171,9 @@ class _BottomNavigationDemoState extends State<BottomNavigationDemo> with Ticker
                 value: BottomNavigationBarType.shifting,
                 child: new Text('Shifting'),
               )
-            ]
+            ],
           )
-        ]
+        ],
       ),
       body: _buildBody(),
       bottomNavigationBar: botNavBar,

examples/flutter_gallery/lib/demo/buttons_demo.dart

@@ -12,8 +12,7 @@ const String _raisedText =
 
 const String _raisedCode = 'buttons_raised';
 
-const String _flatText =
-  "A flat button displays an ink splash on press "
+const String _flatText = "A flat button displays an ink splash on press "
     "but does not lift. Use flat buttons on toolbars, in dialogs and "
     "inline with padding";
 
@@ -27,8 +26,8 @@ const String _dropdownText =
 const String _dropdownCode = 'buttons_dropdown';
 
 const String _iconText =
-  "IconButtons are appropriate for toggle buttons that allow a single choice to be "
-  "selected or deselected, such as adding or removing an item's star.";
+    "IconButtons are appropriate for toggle buttons that allow a single choice "
+    "to be selected or deselected, such as adding or removing an item's star.";
 
 const String _iconCode = 'buttons_icon';
 
@@ -55,37 +54,37 @@ class _ButtonsDemoState extends State<ButtonsDemo> {
         tabName: 'RAISED',
         description: _raisedText,
         widget: buildRaisedButton(),
-        exampleCodeTag: _raisedCode
+        exampleCodeTag: _raisedCode,
       ),
       new ComponentDemoTabData(
         tabName: 'FLAT',
         description: _flatText,
         widget: buildFlatButton(),
-        exampleCodeTag: _flatCode
+        exampleCodeTag: _flatCode,
       ),
       new ComponentDemoTabData(
         tabName: 'DROPDOWN',
         description: _dropdownText,
         widget: buildDropdownButton(),
-        exampleCodeTag: _dropdownCode
+        exampleCodeTag: _dropdownCode,
       ),
       new ComponentDemoTabData(
         tabName: 'ICON',
         description: _iconText,
         widget: buildIconButton(),
-        exampleCodeTag: _iconCode
+        exampleCodeTag: _iconCode,
       ),
       new ComponentDemoTabData(
         tabName: 'ACTION',
         description: _actionText,
         widget: buildActionButton(),
-        exampleCodeTag: _actionCode
+        exampleCodeTag: _actionCode,
       ),
     ];
 
     return new TabbedComponentDemoScaffold(
       title: 'Buttons',
-      demos: demos
+      demos: demos,
     );
   }
 
@@ -99,14 +98,14 @@ class _ButtonsDemoState extends State<ButtonsDemo> {
             child: new Text('RAISED BUTTON'),
             onPressed: () {
               // Perform some action
-            }
+            },
           ),
           new RaisedButton(
             child: new Text('DISABLED'),
-            onPressed: null
-          )
-        ]
+            onPressed: null,
           )
+        ],
+      ),
     );
   }
 
@@ -120,14 +119,14 @@ class _ButtonsDemoState extends State<ButtonsDemo> {
             child: new Text('FLAT BUTTON'),
             onPressed: () {
               // Perform some action
-            }
+            },
           ),
           new FlatButton(
             child: new Text('DISABLED'),
-            onPressed: null
-          )
-        ]
+            onPressed: null,
           )
+        ],
+      ),
     );
   }
 
@@ -158,13 +157,14 @@ class _ButtonsDemoState extends State<ButtonsDemo> {
                 .map((String value) {
                   return new DropdownMenuItem<String>(
                     value: value,
-                    child: new Text(value));
+                    child: new Text(value),
+                  );
                 })
-                .toList()
-             )
+                .toList(),
+             ),
           ),
           new SizedBox(
-            height: 24.0
+            height: 24.0,
           ),
           new ListItem(
             title: new Text('Simple dropdown:'),
@@ -176,17 +176,16 @@ class _ButtonsDemoState extends State<ButtonsDemo> {
                     dropdown2Value = newValue;
                 });
               },
-              items: <String>['One', 'Two', 'Free', 'Four']
-                .map((String value) {
+              items: <String>['One', 'Two', 'Free', 'Four'].map((String value) {
                 return new DropdownMenuItem<String>(
                   value: value,
-                    child: new Text(value));
-                })
-                .toList()
-            )
-          )
-        ]
+                  child: new Text(value),
+                );
+              }).toList(),
+            ),
           )
+        ],
+      ),
     );
   }
 
@@ -203,16 +202,16 @@ class _ButtonsDemoState extends State<ButtonsDemo> {
             onPressed: () {
               setState(() => iconButtonToggle = !iconButtonToggle);
             },
-            color: iconButtonToggle ? Theme.of(context).primaryColor : null
+            color: iconButtonToggle ? Theme.of(context).primaryColor : null,
           ),
           new IconButton(
             icon: new Icon(Icons.thumb_up),
-            onPressed: null
+            onPressed: null,
           )
         ]
         .map((Widget button) => new SizedBox(width: 64.0, height: 64.0, child: button))
-        .toList()
-      )
+        .toList(),
+      ),
     );
   }
 
@@ -223,8 +222,8 @@ class _ButtonsDemoState extends State<ButtonsDemo> {
         child: new Icon(Icons.add),
         onPressed: () {
           // Perform some action
-        }
-      )
+        },
+      ),
     );
   }
 }