/// 步骤模型 class Step { final int? id; final int programId; final int stepNo; final String position; final String name; final int mixTime; final int magnetTime; final int volume; final int blowTime; final int speed; Step({ this.id, required this.programId, required this.stepNo, required this.position, required this.name, this.mixTime = 0, this.magnetTime = 0, this.volume = 0, this.blowTime = 0, this.speed = 5, }); Map toMap() { return { 'id': id, 'program_id': programId, 'step_no': stepNo, 'position': position, 'name': name, 'mix_time': mixTime, 'magnet_time': magnetTime, 'volume': volume, 'blow_time': blowTime, 'speed': speed, }; } factory Step.fromMap(Map map) { return Step( id: map['id'] as int?, programId: map['program_id'] as int, stepNo: map['step_no'] as int, position: map['position'] as String, name: map['name'] as String, mixTime: map['mix_time'] as int? ?? 0, magnetTime: map['magnet_time'] as int? ?? 0, volume: map['volume'] as int? ?? 0, blowTime: map['blow_time'] as int? ?? 0, speed: map['speed'] as int? ?? 5, ); } Step copyWith({ int? id, int? programId, int? stepNo, String? position, String? name, int? mixTime, int? magnetTime, int? volume, int? blowTime, int? speed, }) { return Step( id: id ?? this.id, programId: programId ?? this.programId, stepNo: stepNo ?? this.stepNo, position: position ?? this.position, name: name ?? this.name, mixTime: mixTime ?? this.mixTime, magnetTime: magnetTime ?? this.magnetTime, volume: volume ?? this.volume, blowTime: blowTime ?? this.blowTime, speed: speed ?? this.speed, ); } }