68 lines
2.0 KiB
Dart
68 lines
2.0 KiB
Dart
import 'dart:math' as math;
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import 'package:flame/components.dart';
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import 'package:flutter/material.dart';
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/// حلقهی شمارشِ معکوسِ نوبت: کمانی که در طولِ مهلتِ نوبت خالی میشود.
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/// در ثانیههای پایانی قرمز و ضرباندار میشود. (صدای ضربانِ قلب در HokmGame
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/// مدیریت میشود تا هنگامِ بازیشدنِ کارت بلافاصله قطع شود.)
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class TurnTimer extends PositionComponent {
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final double radius;
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final double durationSeconds;
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double _elapsed = 0;
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TurnTimer({
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required this.radius,
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required this.durationSeconds,
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required Vector2 position,
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}) : super(
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position: position,
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size: Vector2.all(radius * 2),
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anchor: Anchor.center,
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);
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double get _warnSecs => math.min(8.0, durationSeconds * 0.4);
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static final _bg = Paint()
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..style = PaintingStyle.stroke
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..strokeWidth = 3
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..color = Colors.black54;
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@override
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void update(double dt) {
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_elapsed += dt;
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final remaining = durationSeconds - _elapsed;
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// ضربانِ تصویری در پنجرهی هشدار.
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if (remaining > 0 && remaining <= _warnSecs) {
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scale = Vector2.all(1 + 0.18 * math.sin(_elapsed * 2 * math.pi / 0.7).abs());
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} else {
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scale = Vector2.all(1);
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}
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}
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@override
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void render(Canvas canvas) {
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final center = Offset(radius, radius);
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canvas.drawCircle(center, radius, _bg);
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final frac = durationSeconds <= 0
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? 0.0
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: (1 - _elapsed / durationSeconds).clamp(0.0, 1.0);
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if (frac <= 0) return;
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final color = frac > 0.35 ? const Color(0xFFE9B949) : const Color(0xFFE53935);
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final arc = Paint()
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..style = PaintingStyle.stroke
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..strokeWidth = 4
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..strokeCap = StrokeCap.round
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..color = color;
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canvas.drawArc(
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Rect.fromCircle(center: center, radius: radius),
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-math.pi / 2,
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2 * math.pi * frac,
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false,
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arc,
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);
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}
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}
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