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1 // Copyright 2015 The Chromium Authors. All rights reserved. | 1 // Copyright 2015 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 import 'dart:math' as math; | 5 import 'dart:math' as math; |
6 import 'dart:sky' as sky; | 6 import 'dart:sky' as sky; |
7 | 7 |
8 import '../framework/animation/generators.dart'; | 8 import '../framework/animation/generators.dart'; |
9 import '../framework/animation/mechanics.dart'; | 9 import '../framework/animation/mechanics.dart'; |
10 import '../framework/animation/scroll_behavior.dart'; | 10 import '../framework/animation/scroll_behavior.dart'; |
11 import '../theme2/edges.dart'; | 11 import '../theme2/edges.dart'; |
12 import '../theme2/view_configuration.dart' as config; | 12 import '../theme2/view_configuration.dart' as config; |
13 import 'basic.dart'; | 13 import 'basic.dart'; |
14 import 'material.dart'; | 14 import 'material.dart'; |
15 | 15 |
16 const double _kMillisecondsPerSecond = 1000.0; | 16 const double _kMillisecondsPerSecond = 1000.0; |
17 | 17 |
18 double _velocityForFlingGesture(sky.GestureEvent event) { | 18 double _velocityForFlingGesture(sky.GestureEvent event) { |
19 return math.max(-config.kMaxFlingVelocity, math.min(config.kMaxFlingVelocity, | 19 return math.max(-config.kMaxFlingVelocity, math.min(config.kMaxFlingVelocity, |
20 -event.velocityY)) / _kMillisecondsPerSecond; | 20 -event.velocityY)) / _kMillisecondsPerSecond; |
21 } | 21 } |
22 | 22 |
23 abstract class ScrollClient { | 23 abstract class ScrollClient { |
24 bool ancestorScrolled(Scrollable ancestor); | 24 bool ancestorScrolled(Scrollable ancestor); |
25 } | 25 } |
26 | 26 |
27 abstract class Scrollable extends Component { | 27 abstract class Scrollable extends Component { |
28 | 28 |
29 Scrollable({Object key}) : super(key: key, stateful: true); | 29 Scrollable({ Object key, Color this.backgroundColor }) : super(key: key, state ful: true); |
30 | 30 |
31 void syncFields(Scrollable source) { } | 31 void syncFields(Scrollable source) { } |
Hixie
2015/06/15 17:54:39
You need to sync the background color.
hansmuller
2015/06/15 18:29:08
Done.
| |
32 | 32 |
33 Color backgroundColor; | |
Hixie
2015/06/15 17:54:39
This should go immediately below the constructor.
hansmuller
2015/06/15 18:29:08
Done.
| |
34 | |
33 double _scrollOffset = 0.0; | 35 double _scrollOffset = 0.0; |
34 double get scrollOffset => _scrollOffset; | 36 double get scrollOffset => _scrollOffset; |
35 | 37 |
36 ScrollBehavior _scrollBehavior; | 38 ScrollBehavior _scrollBehavior; |
37 ScrollBehavior createScrollBehavior(); | 39 ScrollBehavior createScrollBehavior(); |
38 ScrollBehavior get scrollBehavior { | 40 ScrollBehavior get scrollBehavior { |
39 if (_scrollBehavior == null) | 41 if (_scrollBehavior == null) |
40 _scrollBehavior = createScrollBehavior(); | 42 _scrollBehavior = createScrollBehavior(); |
41 return _scrollBehavior; | 43 return _scrollBehavior; |
42 } | 44 } |
43 | 45 |
44 Simulation _simulation; | 46 Simulation _simulation; |
45 | 47 |
46 UINode buildContent(); | 48 UINode buildContent(); |
47 | 49 |
48 UINode build() { | 50 UINode build() { |
49 return new EventListenerNode( | 51 return new EventListenerNode( |
50 new Material( | 52 new Material( |
51 child: buildContent(), | 53 child: buildContent(), |
52 edge: MaterialEdge.canvas | 54 edge: MaterialEdge.canvas, |
55 color: backgroundColor | |
53 ), | 56 ), |
54 onPointerDown: _handlePointerDown, | 57 onPointerDown: _handlePointerDown, |
55 onPointerUp: _handlePointerUpOrCancel, | 58 onPointerUp: _handlePointerUpOrCancel, |
56 onPointerCancel: _handlePointerUpOrCancel, | 59 onPointerCancel: _handlePointerUpOrCancel, |
57 onGestureFlingStart: _handleFlingStart, | 60 onGestureFlingStart: _handleFlingStart, |
58 onGestureFlingCancel: _handleFlingCancel, | 61 onGestureFlingCancel: _handleFlingCancel, |
59 onGestureScrollUpdate: _handleScrollUpdate, | 62 onGestureScrollUpdate: _handleScrollUpdate, |
60 onWheel: _handleWheel | 63 onWheel: _handleWheel |
61 ); | 64 ); |
62 } | 65 } |
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149 | 152 |
150 void _handleFlingCancel(sky.GestureEvent event) { | 153 void _handleFlingCancel(sky.GestureEvent event) { |
151 _startSimulation(_createParticle()); | 154 _startSimulation(_createParticle()); |
152 } | 155 } |
153 | 156 |
154 void _handleWheel(sky.WheelEvent event) { | 157 void _handleWheel(sky.WheelEvent event) { |
155 scrollBy(-event.offsetY); | 158 scrollBy(-event.offsetY); |
156 } | 159 } |
157 | 160 |
158 } | 161 } |
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