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a94999ba50
Each layer is supposed to reexport the parts of the previous layer that are part of its API. - In painting.dart, export from dart:ui all the Canvas-related APIs that make sense to be used at higher levels, e.g. PaintingStyle. - Delete painting/shadows.dart. It was dead code. - In rendering/object.dart, export all of painting.dart. - In widgets/basic.dart, export all of painting.dart and animation.dart. Some classes in animation/ are renamed to make this less disruptive and confusing to the namespace. - Split out Stocks back into an import model rather than a part model, so that it's easier to manage its dependencies on a per-file basis. - Move Ticker to scheduler library. - Remove as many redundant imports as possible now. - Some minor nit picking cleanup in various files.
114 lines
3.0 KiB
Dart
114 lines
3.0 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/material.dart';
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final List<Map<int, Color>> _kColors = <Map<int, Color>>[
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Colors.amber,
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Colors.yellow,
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Colors.blue,
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Colors.purple,
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Colors.indigo,
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Colors.deepOrange,
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];
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class SmoothBlock extends StatefulComponent {
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SmoothBlock({ this.color });
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final Map<int, Color> color;
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SmoothBlockState createState() => new SmoothBlockState();
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}
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class CardTransition extends StatelessComponent {
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CardTransition({
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this.child,
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this.animation,
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this.x,
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this.opacity,
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this.scale
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});
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final Widget child;
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final Animation<double> animation;
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final Animatable<double> x;
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final Animatable<double> opacity;
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final Animatable<double> scale;
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Widget build(BuildContext context) {
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return new AnimatedBuilder(
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animation: animation,
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builder: (BuildContext context, Widget child) {
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double currentScale = scale.evaluate(animation);
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Matrix4 transform = new Matrix4.identity()
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..translate(x.evaluate(animation))
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..scale(currentScale, currentScale);
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return new Opacity(
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opacity: opacity.evaluate(animation),
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child: new Transform(
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transform: transform,
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child: child
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)
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);
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},
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child: child
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);
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}
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}
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class SmoothBlockState extends State<SmoothBlock> {
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double _height = 100.0;
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Widget _handleEnter(Animation<double> animation, Widget child) {
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return new CardTransition(
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x: new Tween<double>(begin: -200.0, end: 0.0),
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opacity: new Tween<double>(begin: 0.0, end: 1.0),
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scale: new Tween<double>(begin: 0.8, end: 1.0),
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animation: new CurvedAnimation(parent: animation, curve: Curves.ease),
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child: child
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);
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}
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Widget _handleExit(Animation<double> animation, Widget child) {
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return new CardTransition(
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x: new Tween<double>(begin: 0.0, end: 200.0),
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opacity: new Tween<double>(begin: 1.0, end: 0.0),
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scale: new Tween<double>(begin: 1.0, end: 0.8),
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animation: new CurvedAnimation(parent: animation, curve: Curves.ease),
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child: child
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);
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}
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Widget build(BuildContext context) {
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return new GestureDetector(
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onTap: () {
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setState(() {
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_height = _height == 100.0 ? 200.0 : 100.0;
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});
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},
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child: new EnterExitTransition(
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duration: const Duration(milliseconds: 1500),
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onEnter: _handleEnter,
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onExit: _handleExit,
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child: new Container(
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key: new ValueKey(_height),
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height: _height,
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decoration: new BoxDecoration(backgroundColor: config.color[_height.floor() * 4])
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)
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)
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);
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}
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}
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class SmoothResizeDemo extends StatelessComponent {
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Widget build(BuildContext context) {
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return new Block(children: _kColors.map((Map<int, Color> color) => new SmoothBlock(color: color)).toList());
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}
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}
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void main() {
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runApp(new SmoothResizeDemo());
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}
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