addFlowersForImage method

void addFlowersForImage({ required ImageProvider<Object> imageProvider, required Size screenSize, required TickerProvider vsync, required Map<ImageProvider<Object>, List<Widget>> flowersMap, required Map<ImageProvider<Object>, List<AnimationController>> controllersMap, })

Implementation

void addFlowersForImage({
  required ImageProvider imageProvider,
  required Size screenSize,
  required TickerProvider vsync,
  required Map<ImageProvider, List<Widget>> flowersMap,
  required Map<ImageProvider, List<AnimationController>> controllersMap,
}) {
  Random random = Random();

  for (int i = 0; i < 15; i++) {
    final startX = random.nextDouble() * screenSize.width;
    final startY = -random.nextDouble() * 200.0;
    final endY = screenSize.height + random.nextDouble() * 100.0;

    final duration = Duration(milliseconds: 1500 + random.nextInt(2000));

    final AnimationController controller = _controllerPool.isNotEmpty
        ? _controllerPool.removeLast()
        : AnimationController(vsync: vsync, duration: duration);

    controllersMap.putIfAbsent(imageProvider, () => []).add(controller);

    final animationY = Tween<double>(begin: startY, end: endY).animate(
      CurvedAnimation(parent: controller, curve: Curves.linear),
    );

    final flowerWidget = AnimatedBuilder(
      animation: animationY,
      builder: (context, child) {
        final yValue = animationY.value;
        return Positioned(
          left: startX,
          top: yValue,
          child: Opacity(
            opacity: (1 - ((yValue - startY) / (screenSize.height + 200.0)))
                .clamp(0.0, 1.0),
            child: Image(
              image: imageProvider,
              width: 25,
            ),
          ),
        );
      },
    );

    flowersMap.putIfAbsent(imageProvider, () => []).add(flowerWidget);
    controller.forward();
  }
}