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Additionally: - add haptic feedback when opening/closing timeline - fix inability to scroll `Attachment`s by dragging - impl `onPointerPanZoomUpdate` event handling in `Chat` - make `DateTimeElement` to be sticky header in `Chat`
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| // Copyright © 2022 IT ENGINEERING MANAGEMENT INC, <https://github.com/team113> | ||
| // | ||
| // This program is free software: you can redistribute it and/or modify it under | ||
| // the terms of the GNU Affero General Public License v3.0 as published by the | ||
| // Free Software Foundation, either version 3 of the License, or (at your | ||
| // option) any later version. | ||
| // | ||
| // This program is distributed in the hope that it will be useful, but WITHOUT | ||
| // ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS | ||
| // FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License v3.0 for | ||
| // more details. | ||
| // | ||
| // You should have received a copy of the GNU Affero General Public License v3.0 | ||
| // along with this program. If not, see | ||
| // <https://www.gnu.org/licenses/agpl-3.0.html>. | ||
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| import 'package:flutter/material.dart'; | ||
|
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| /// Animated translation of the provided [child] on the [offset] changes. | ||
| class AnimatedOffset extends ImplicitlyAnimatedWidget { | ||
| const AnimatedOffset({ | ||
| Key? key, | ||
| required this.offset, | ||
| required this.child, | ||
| Duration duration = const Duration(milliseconds: 250), | ||
| Curve curve = Curves.linear, | ||
| void Function()? onEnd, | ||
| }) : super(key: key, curve: curve, duration: duration, onEnd: onEnd); | ||
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| /// [Offset] to apply to the [child]. | ||
| final Offset offset; | ||
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| /// [Widget] to offset. | ||
| final Widget child; | ||
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| @override | ||
| ImplicitlyAnimatedWidgetState<AnimatedOffset> createState() => | ||
| _AnimatedOffsetState(); | ||
| } | ||
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| /// State of an [AnimatedOffset] maintaining its [_animation] and [_transform]. | ||
| class _AnimatedOffsetState | ||
| extends ImplicitlyAnimatedWidgetState<AnimatedOffset> { | ||
| /// [Animation] animating the [Offset] changes. | ||
| late Animation<Offset> _animation; | ||
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| /// [Tween] to drive the [_animation] with. | ||
| Tween<Offset>? _transform; | ||
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| @override | ||
| void forEachTween(TweenVisitor<dynamic> visitor) { | ||
| _transform = visitor( | ||
| _transform, | ||
| widget.offset, | ||
| (value) => Tween<Offset>(begin: value as Offset), | ||
| ) as Tween<Offset>?; | ||
| } | ||
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| @override | ||
| void didUpdateTweens() => _animation = animation.drive(_transform!); | ||
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| @override | ||
| Widget build(BuildContext context) { | ||
| return AnimatedBuilder( | ||
| animation: _animation, | ||
| builder: (_, child) => | ||
| Transform.translate(offset: _animation.value, child: child!), | ||
| child: widget.child, | ||
| ); | ||
| } | ||
| } |
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