Use named Image constructors (#5129)

Some folks didn't realize these existed and asked us to add them. By
using them in examples, hopefully folks will discover them more easily.

dev/manual_tests/card_collection.dart

@@ -429,7 +429,7 @@ class CardCollectionState extends State<CardCollection> {
     if (_sunshine) {
       cardCollection = new Stack(
         children: <Widget>[
-          new Column(children: <Widget>[new Image(image: new NetworkImage(_sunshineURL))]),
+          new Column(children: <Widget>[new Image.fromNetwork(src: _sunshineURL)]),
           new ShaderMask(child: cardCollection, shaderCallback: _createShader)
         ]
       );

dev/manual_tests/weather_demo.dart

@@ -157,8 +157,8 @@ class WeatherButton extends StatelessWidget {
           child: new InkWell(
             onTap: onPressed,
             child: new Center(
-              child: new Image(
-                image: new AssetImage(icon),
+              child: new Image.fromAssetBundle(
+                name: icon,
                 width: _kWeatherIconSize,
                 height: _kWeatherIconSize
               )

examples/flutter_gallery/lib/demo/cards_demo.dart

@@ -66,8 +66,8 @@ class TravelDestinationItem extends StatelessWidget {
                     top: 0.0,
                     bottom: 0.0,
                     right: 0.0,
-                    child: new Image(
-                      image: new AssetImage(destination.assetName),
+                    child: new Image.fromAssetBundle(
+                      name: destination.assetName,
                       fit: ImageFit.cover
                     )
                   ),

examples/flutter_gallery/lib/demo/contacts_demo.dart

@@ -129,8 +129,8 @@ class ContactsDemoState extends State<ContactsDemo> {
             title : new Text('Ali Connors'),
             background: new Stack(
               children: <Widget>[
-                new Image(
-                  image: new AssetImage('packages/flutter_gallery_assets/ali_connors.png'),
+                new Image.fromAssetBundle(
+                  name: 'packages/flutter_gallery_assets/ali_connors.png',
                   fit: ImageFit.cover,
                   height: _appBarHeight
                 ),

examples/flutter_gallery/lib/demo/grid_list_demo.dart

@@ -62,8 +62,8 @@ class GridDemoPhotoItem extends StatelessWidget {
           body: new Material(
             child: new Hero(
               tag: photoHeroTag,
-              child: new Image(
-                image: new AssetImage(photo.assetName),
+              child: new Image.fromAssetBundle(
+                name: photo.assetName,
                 fit: ImageFit.cover
               )
             )
@@ -80,8 +80,8 @@ class GridDemoPhotoItem extends StatelessWidget {
       child: new Hero(
         key: new Key(photo.assetName),
         tag: photoHeroTag,
-        child: new Image(
-          image: new AssetImage(photo.assetName),
+        child: new Image.fromAssetBundle(
+          name: photo.assetName,
           fit: ImageFit.cover
         )
       )

examples/flutter_gallery/lib/demo/pesto_demo.dart

@@ -105,8 +105,8 @@ class _PestoDemoState extends State<PestoDemo> {
               bottom: extraPadding
             ),
             child: new Center(
-              child: new Image(
-                image: new AssetImage(_kLogoImages[bestHeight]),
+              child: new Image.fromAssetBundle(
+                name: _kLogoImages[bestHeight],
                 fit: ImageFit.scaleDown
               )
             )
@@ -134,8 +134,8 @@ class _PestoDemoState extends State<PestoDemo> {
                   padding: const EdgeInsets.all(2.0),
                   margin: const EdgeInsets.only(bottom: 16.0),
                   child: new ClipOval(
-                    child: new Image(
-                      image: new AssetImage(_kUserImage),
+                    child: new Image.fromAssetBundle(
+                      name: _kUserImage,
                       fit: ImageFit.contain
                     )
                   )
@@ -237,8 +237,8 @@ class _RecipeCard extends StatelessWidget {
           child: new Column(
             crossAxisAlignment: CrossAxisAlignment.start,
             children: <Widget>[
-              new Image(
-                image: new AssetImage(recipe.imagePath),
+              new Image.fromAssetBundle(
+                name: recipe.imagePath,
                 fit: ImageFit.contain
               ),
               new Flexible(
@@ -246,8 +246,8 @@ class _RecipeCard extends StatelessWidget {
                   children: <Widget>[
                     new Padding(
                       padding: const EdgeInsets.all(16.0),
-                      child: new Image(
-                        image: new AssetImage(recipe.ingredientsImagePath),
+                      child: new Image.fromAssetBundle(
+                        name: recipe.ingredientsImagePath,
                         width: 48.0,
                         height: 48.0
                       )
@@ -422,8 +422,8 @@ class _RecipeSheet extends StatelessWidget {
               children: <Widget>[
                 new TableCell(
                   verticalAlignment: TableCellVerticalAlignment.middle,
-                  child: new Image(
-                    image: new AssetImage(recipe.ingredientsImagePath),
+                  child: new Image.fromAssetBundle(
+                    name: recipe.ingredientsImagePath,
                     width: 32.0,
                     height: 32.0,
                     alignment: FractionalOffset.centerLeft,

examples/flutter_gallery/lib/demo/shrine/shrine_home.dart

@@ -78,8 +78,8 @@ class VendorItem extends StatelessWidget {
             child: new ClipRRect(
               xRadius: 12.0,
               yRadius: 12.0,
-              child: new Image(
-                image: new AssetImage(vendor.avatarAsset),
+              child: new Image.fromAssetBundle(
+                name: vendor.avatarAsset,
                 fit: ImageFit.cover
               )
             )
@@ -209,8 +209,8 @@ class FeatureItem extends StatelessWidget {
                         minHeight: 340.0,
                         maxHeight: 340.0,
                         alignment: FractionalOffset.topRight,
-                        child: new Image(
-                          image: new AssetImage(product.imageAsset),
+                        child: new Image.fromAssetBundle(
+                          name: product.imageAsset,
                           fit: ImageFit.cover
                         )
                       )
@@ -273,8 +273,8 @@ class ProductItem extends StatelessWidget {
                 child: new Hero(
                     tag: productHeroTag,
                     key: new ObjectKey(product),
-                    child: new Image(
-                      image: new AssetImage(product.imageAsset),
+                    child: new Image.fromAssetBundle(
+                      name: product.imageAsset,
                       fit: ImageFit.contain
                     )
                   )

examples/flutter_gallery/lib/demo/shrine/shrine_order.dart

@@ -41,8 +41,8 @@ class OrderItem extends StatelessWidget {
                 height: 248.0,
                 child: new Hero(
                   tag: productHeroTag,
-                  child: new Image(
-                    image: new AssetImage(product.imageAsset),
+                  child: new Image.fromAssetBundle(
+                    name: product.imageAsset,
                     fit: ImageFit.contain
                   )
                 )
@@ -201,8 +201,8 @@ class _OrderPageState extends State<OrderPage> {
               .map((Product product) {
               return new Card(
                 elevation: 0,
-                child: new Image(
-                  image: new AssetImage(product.imageAsset),
+                child: new Image.fromAssetBundle(
+                  name: product.imageAsset,
                   fit: ImageFit.contain
                 )
               );

examples/flutter_gallery/lib/demo/tabs_demo.dart

@@ -99,8 +99,8 @@ class _CardDataItem extends StatelessWidget {
             new SizedBox(
               width: 144.0,
               height: 144.0,
-              child: new Image(
-                image: new AssetImage(data.imageAsset),
+              child: new Image.fromAssetBundle(
+                name: data.imageAsset,
                 fit: ImageFit.contain
               )
             ),

examples/flutter_gallery/lib/gallery/example_code.dart

@@ -222,8 +222,8 @@ new ScrollableGrid(
       footer: new GridTileBar(
         title: new Text(url)
       ),
-      child: new Image(
-        image: new NetworkImage(url),
+      child: new Image.fromNetwork(
+        src: url,
         fit: ImageFit.cover
       )
     );

examples/flutter_gallery/lib/gallery/home.dart

@@ -98,8 +98,8 @@ class GalleryHomeState extends State<GalleryHome> {
       appBar: new AppBar(
         expandedHeight: _kFlexibleSpaceMaxHeight,
         flexibleSpace: new FlexibleSpaceBar(
-          background: new Image(
-            image: new AssetImage('packages/flutter_gallery_assets/appbar_background.jpg'),
+          background: new Image.fromAssetBundle(
+            name: 'packages/flutter_gallery_assets/appbar_background.jpg',
             fit: ImageFit.cover,
             height: _kFlexibleSpaceMaxHeight
           ),

examples/layers/widgets/spinning_mixed.dart

@@ -51,9 +51,7 @@ void attachWidgetTreeToRenderTree(RenderProxyBox container) {
                   new RaisedButton(
                     child: new Row(
                       children: <Widget>[
-                        new Image(
-                          image: new NetworkImage('http://flutter.io/favicon.ico')
-                        ),
+                        new Image.fromNetwork(src: 'http://flutter.io/favicon.ico'),
                         new Text('PRESS ME'),
                       ]
                     ),

packages/flutter_markdown/lib/src/markdown_raw.dart

@@ -485,8 +485,8 @@ class _Block {
       }
     }
 
-    return new Image(
-      image: new NetworkImage(path),
+    return new Image.fromNetwork(
+      src: path,
       width: width,
       height: height
     );