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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 '../animation/generators.dart'; | 8 import '../animation/generators.dart'; |
| 9 import '../animation/mechanics.dart'; | 9 import '../animation/mechanics.dart'; |
| 10 import '../animation/scroll_behavior.dart'; | 10 import '../animation/scroll_behavior.dart'; |
| 11 import '../theme2/edges.dart'; | 11 import '../theme/edges.dart'; |
| 12 import '../theme2/view_configuration.dart' as config; | 12 import '../theme/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 |
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| 155 | 155 |
| 156 void _handleFlingCancel(sky.GestureEvent event) { | 156 void _handleFlingCancel(sky.GestureEvent event) { |
| 157 _startSimulation(_createParticle()); | 157 _startSimulation(_createParticle()); |
| 158 } | 158 } |
| 159 | 159 |
| 160 void _handleWheel(sky.WheelEvent event) { | 160 void _handleWheel(sky.WheelEvent event) { |
| 161 scrollBy(-event.offsetY); | 161 scrollBy(-event.offsetY); |
| 162 } | 162 } |
| 163 | 163 |
| 164 } | 164 } |
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