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motion: add smooth exit animation to AppToast and bidirectional slide to WelcomeTourDialog

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评估

难度
3/5
预计耗时
1-2 天
新手友好度
60/100
Issue 类型
缺陷
描述清晰度
描述清楚
活跃度
活跃
技术栈
dart, flutter
领域
desktop, frontend

调研方向

Read lib/shared/widgets/app_toast.dart and lib/features/onboarding/welcome_tour_dialog.dart, tracing toast dismissal and the welcome tour's AnimatedSwitcher navigation. Add a reverse exit animation before onClosed(), animate the remaining toast stack's height changes, and make the slide direction follow forward or back navigation. Done when toast exits and stack repositioning animate smoothly, and backward tour navigation slides in from the opposite direction.

由索引模型根据 Issue 内容生成。

描述

enhancement frontend
Problem
  1. Abrupt toast disappearance:
    In lib/shared/widgets/app_toast.dart, toasts animate their entry with a curved transition, but when the timer expires (_timer = Timer(d.show, _close)), the toast is instantly removed from _ToastHost._items.value. The toast disappears abruptly without a fade/slide-out, causing remaining stacked toasts to jump to their new vertical positions without animation.

  2. Unidirectional slide in Welcome Tour:
    In lib/features/onboarding/welcome_tour_dialog.dart, AnimatedSwitcher uses a static SlideTransition with begin: const Offset(0.04, 0). When navigating forward (Next), sliding in from the right looks natural. However, when navigating backward (Back), the incoming step still slides in from the right, which feels unnatural.

Change
  • In AppToast, play _controller.reverse() before triggering onClosed(), and animate height changes for remaining stacked toasts.
  • In WelcomeTourDialog, track navigation direction (forward vs back) and invert the slide offset sign accordingly.
主要语言
Dart
星标
23
派生
1
平均合并
32 分钟
30 天内合并 PR
537

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