trackoffical_app/lib/view/ingame/game_std/layer_cp_start_bubble.dart

import 'dart:math';

import 'package:bubble/bubble.dart';
import 'package:trackoffical_app/screen.dart';

import 'game_std_controller.dart';

class LayerCPStartBubble extends LayerView<GameStdController> {
  const LayerCPStartBubble({super.key});



  @override
  Widget build(BuildContext context) {
    return Obx(() {
      final model =  viewModel.instance.model;

      var points = model.controlPointWantSequence;

      if (model.startAt != null || points.isEmpty) {
        return const SizedBox();
      }
      final start = points[0];

      var xy = viewModel
          .mapOffsetToScreen(Offset(start.onMap.dx, start.onMap.dy));

      var x = xy.dx;
      var y = xy.dy;
      var h0 = viewModel
          .mapOffsetToScreen(const Offset(0, 0));
      var h1 = viewModel
          .mapOffsetToScreen(const Offset(0, 60));
      final dx = h1.dx - h0.dx;
      final dy = h1.dy - h0.dy;
      var h = sqrt(dx * dx + dy * dy);

      return Positioned(
        top: y,
        left: x + h + 1.0.wp,
        child: Bubble(
          nip: BubbleNip.leftTop,
          alignment: Alignment.topRight,
          child: const Text('打开始点后计时', style: TextStyle(color: Colors.red)),
        ),
      );
    });
  }
}