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Improve widgets/README.md based on Hixie's feeback

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R=ianh@google.com

Review URL: https://codereview.chromium.org/1188163004.
This commit is contained in:
Adam Barth 2015-06-17 10:39:47 -07:00
parent 87e47ef04a
commit d6ddfcaf99
1 changed files with 26 additions and 25 deletions
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51
sdk/lib/widgets/README.md
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@ -69,16 +69,16 @@ import 'package:sky/widgets/basic.dart';
class MyToolBar extends Component {
Widget build() {
return new Container(
decoration: const BoxDecoration(
backgroundColor: const Color(0xFF00FFFF),
),
height: 56.0,
padding: new EdgeDims.symmetric(horizontal: 8.0),
child: new Flex([
new Image(src: 'menu.png', size: const Size(25.0, 25.0)),
new Flexible(child: new Text('My awesome toolbar')),
new Image(src: 'search.png', size: const Size(25.0, 25.0)),
]),
height: 56.0,
padding: new EdgeDims.symmetric(horizontal: 8.0),
decoration: const BoxDecoration(
backgroundColor: const Color(0xFF00FFFF),
)
])
);
}
}
@ -113,8 +113,9 @@ void main() {
```
Here, we've used the `Center` widget to center the toolbar within the view, both
vertically and horizontally. Because the toolbar uses a flexible layout
internally, it expands to fill all the available horizontal space.
vertically and horizontally. If we didn't center the toolbar, it would fill the
view, both vertically and horizontally, because the root widget is sized to fill
the view.
Listening to Events
-------------------
@ -137,18 +138,18 @@ final BoxDecoration _decoration = new BoxDecoration(
class MyButton extends Component {
Widget build() {
return new Listener(
onGestureTap: (event) {
print('MyButton was tapped!');
},
child: new Container(
child: new Center(
child: new Text('Engage')
),
height: 36.0,
padding: new EdgeDims.all(8.0),
margin: new EdgeDims.symmetric(horizontal: 8.0),
decoration: _decoration
),
onGestureTap: (event) {
print('MyButton was tapped!');
}
decoration: _decoration,
child: new Center(
child: new Text('Engage')
)
)
);
}
}
@ -180,17 +181,17 @@ class MyButton extends Component {
Widget build() {
return new Listener(
child: new Container(
child: new Center(child: child),
height: 36.0,
padding: new EdgeDims.all(8.0),
margin: new EdgeDims.symmetric(horizontal: 8.0),
decoration: _decoration
),
onGestureTap: (_) {
if (onPressed != null)
onPressed();
}
},
child: new Container(
height: 36.0,
padding: new EdgeDims.all(8.0),
margin: new EdgeDims.symmetric(horizontal: 8.0),
decoration: _decoration,
child: new Center(child: child)
)
);
}
}
@ -208,8 +209,8 @@ button:
child: new Flex([
new Image(src: 'thumbs-up.png', size: const Size(25.0, 25.0)),
new Container(
child: new Text('Thumbs up'),
padding: new EdgeDims.only(left: 10.0)
child: new Text('Thumbs up'),
)
])
)