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0b098ee2e5
Also, clean up the class hierarchy for AnimationController now that we've renamed progress to value. That means everything in the hierarchy now has a value, include Watchable. This patch renames Watchable to Animated<T>, which lets us use that type almost everywhere. I've added some ducktape to modal bottom sheets to avoid having to refactor all of Navigator to use AnimationController. I'll remove the ducktape in the next patch.
100 lines
3.1 KiB
Dart
100 lines
3.1 KiB
Dart
// Copyright 2015 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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import 'package:flutter/animation.dart';
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import 'package:flutter/material.dart';
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class ProgressIndicatorDemo extends StatefulComponent {
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_ProgressIndicatorDemoState createState() => new _ProgressIndicatorDemoState();
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}
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class _ProgressIndicatorDemoState extends State<ProgressIndicatorDemo> {
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void initState() {
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super.initState();
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controller = new AnimationController(
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duration: const Duration(milliseconds: 1500)
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)..play(AnimationDirection.forward);
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animation = new CurvedAnimation(
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parent: controller,
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curve: new Interval(0.0, 0.9, curve: Curves.ease),
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reverseCurve: Curves.ease
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)..addStatusListener((PerformanceStatus status) {
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if (status == PerformanceStatus.dismissed || status == PerformanceStatus.completed)
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reverseValueAnimationDirection();
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});
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}
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Animated<double> animation;
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AnimationController controller;
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void handleTap() {
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setState(() {
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// valueAnimation.isAnimating is part of our build state
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if (controller.isAnimating)
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controller.stop();
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else
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controller.resume();
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});
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}
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void reverseValueAnimationDirection() {
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AnimationDirection direction = (controller.direction == AnimationDirection.forward)
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? AnimationDirection.reverse
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: AnimationDirection.forward;
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controller.play(direction);
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}
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Widget buildIndicators(BuildContext context) {
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List<Widget> indicators = <Widget>[
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new SizedBox(
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width: 200.0,
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child: new LinearProgressIndicator()
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),
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new LinearProgressIndicator(),
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new LinearProgressIndicator(),
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new LinearProgressIndicator(value: animation.value),
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new CircularProgressIndicator(),
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new SizedBox(
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width: 20.0,
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height: 20.0,
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child: new CircularProgressIndicator(value: animation.value)
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),
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new SizedBox(
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width: 50.0,
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height: 30.0,
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child: new CircularProgressIndicator(value: animation.value)
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),
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new Text("${(animation.value * 100.0).toStringAsFixed(1)}%" + (controller.isAnimating ? '' : ' (paused)'))
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];
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return new Column(
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children: indicators
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.map((Widget c) => new Container(child: c, margin: const EdgeDims.symmetric(vertical: 15.0, horizontal: 20.0)))
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.toList(),
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justifyContent: FlexJustifyContent.center
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);
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}
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Widget build(BuildContext context) {
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return new Scaffold(
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toolBar: new ToolBar(center: new Text('Progress Indicators')),
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body: new DefaultTextStyle(
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style: Theme.of(context).text.title,
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child: new GestureDetector(
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onTap: handleTap,
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behavior: HitTestBehavior.opaque,
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child: new Container(
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padding: const EdgeDims.symmetric(vertical: 12.0, horizontal: 8.0),
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child: new AnimatedBuilder(
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animation: animation,
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builder: buildIndicators
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)
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)
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)
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)
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);
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}
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}
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