Category: Dart

To get more control over the order that widgets are focused on when the user tabs through, you can use FocusTraversalGroup to define sections of the tree that should be treated as a group when tabbing. For example, you might to tab through all the fields in a form before tabbing to the submit button:… Continue reading Controlling traversal order

Users with physical keyboards expect that they can use the tab key to quickly navigate an application, and users with motor or vision differences often rely completely on keyboard navigation. There are two considerations for tab interactions: how focus moves from widget to widget, known as traversal, and the visual highlight shown when a widget… Continue reading Tab traversal and focus interactions

Set up a trigger for animation and choose an end value Configure the animation to trigger when the user clicks Show details. To do this, change opacity state using the onPressed() handler for TextButton. To make the FadeInDemo widget become fully visible when the user clicks Show details, use the onPressed() handler to set opacity… Continue reading Animate opacity with AnimatedOpacity widget – Set up a trigger for animation and choose an end value

class _FadeInDemoState extends State<FadeInDemo> {  double opacity = 0;  @override  Widget build(BuildContext context) {   return ListView(children: <Widget>[    // …    AnimatedOpacity(     opacity: opacity,     child: const Column(

@override Widget build(BuildContext context) {  return ListView(children: <Widget>[   Image.network(owlUrl),   TextButton(    child: const Text(     ‘Show Details’,     style: TextStyle(color: Colors.blueAccent),    ),    onPressed: () => {},   ),   const Column(    children: [     Text(‘Type: Owl’),     Text(‘Age: 39’),     Text(‘Employment: None’),    ],   ),   AnimatedOpacity(    child: const Column(     children: [      Text(‘Type: Owl’),      Text(‘Age: 39’),      Text(‘Employment: None’),     ],    ),   ),  ]); }