flutter_weather_bg 3.1.0

Provide a variety of weather background animation effects, covering 15 weather types, including sunny,rain,snow...

3.1.0

Non-breaking performance & refactor release. Public API is unchanged; user code that depends only on WeatherBg keeps working.

• Perf: animation layers (rain/snow, thunder, night-star) now drive their CustomPainter via repaint: listenable instead of setState every frame — no more whole-subtree rebuilds 60 times per second. Significant CPU drop for rain/snow heavy scenes.
• Perf: per-frame ColorFilter.matrix([...20 doubles]) allocations replaced with ColorFilter.mode(..., modulate) for simple alpha modulation (rain, snow, thunder, stars). Far less GC pressure with 200+ particles.
• Perf: thunder particle objects are now reused instead of reallocated every 3-second loop.
• Refactor: BgPainter was 12 near-identical drawXxx methods (~330 lines). Replaced with a data-driven _CloudLayer spec map — adding a new weather variant now takes one map entry, not a new method.
• Refactor: WeatherBg replaced the hand-rolled AnimatedCrossFade state swap with AnimatedSwitcher + ValueKey(weatherType). Removed 40 lines of state-tracking code; same 300ms fade.
• Cleanup: ui.Image instances are now disposed in State.dispose (Flutter 3.1+ API).
• Cleanup: removed a dead CurvedAnimation(...) expression in the rain/snow layer that was leaking a listener.
• Cleanup: Random() calls inside particle systems now share a single top-level instance.
• Cleanup: hardcoded design-size constants (392, 817) extracted into utils/constants.dart.

3.0.0

Breaking: This release opts into sound null-safety; 2.8.2 did not. Users upgrading from 2.x must migrate their call sites accordingly (nothing in the public API was renamed — only types are now non-nullable where appropriate).

• Migrate to Flutter 3.x / Dart 3 null-safety (min SDK: Flutter >=3.0.0, Dart >=3.0.0 <4.0.0)
• Replace deprecated @required with the required keyword and adopt super.key in all constructors
• Annotate long-lived state fields with late / nullable types; drop redundant null-check branches
• Add mounted guards around async setState callbacks to avoid "setState() called after dispose"
• Fix WeatherPrint typedef signature (wrapWidth/tag now nullable)
• Rebuild example/ native shells (AGP 8 / Gradle 8, Kotlin DSL, new iOS template, Web platform added)
• Bump flutter_lints to ^5.0.0; example uses Material 3 by default
• Fix MIT LICENSE copyright holder

2.8.0

• Optimize the distance effect of raindrops
• Optimize the display effect under different width and height
• Optimize rendering logic

2.7.0

• Beautify the home page entrance display UI

2.6.0

• Minimum height of restricted sunny night

2.5.0

• Update ReadMe

2.3.0

• Add comment information

2.2.0

• Adjust cloud image position
• Remove unnecessary printing
• New list display example

2.1.0

• Remove unnecessary tripartite dependence
• Support multi platform

2.0.0

• Add more detailed comments and instructions
• Supports over animation when switching weather types
• Support the display effect of pictures after dynamically changing the width and height
• Optimized rendering algorithm, more fluent

1.3.0

• Add comments; change code structure

1.2.0

• Update Readme

1.1.0

• Support dynamic modification of background size, and optimize cloud image effect

1.0.0

• The basic functions are completed and 15 weather background types are supported

0.0.3

• Update Readme

0.0.2

• Add test widget and test plug-in

0.0.1

• Init project