import 'package:todo_list/model/all_model.dart'; class TaskDetailPageLogic{ final TaskDetailPageModel _model; TaskDetailPageLogic(this._model); double getOverallProgress(){ int length = _model.taskBean.detailList.length; double overallProgress = 0.0; for(int i = 0; i < length;i++){ overallProgress += _model.taskBean.detailList[i].itemProgress / length; } return overallProgress; } }