public StudentTaskViewModel(StudentEducationTask task)
{
_bestMark = new SolidColorBrush(Colors.LimeGreen);
_goodMark = new SolidColorBrush(Colors.Orange);
_worsestMark = new SolidColorBrush(Colors.Red);
_task = task;
OpenSolution = new DelegateCommand(() => ViewService.CreateView(new SolutionWindowViewModel(_task)).ShowDialog(), () => _task.IsDone);
}
public void Insert(StudentEducationTask educationTask)
{
var finded = _educationTaskProvider.Select().FirstOrDefault(i => i.Student.Equals(educationTask.Student) && i.Material.Equals(educationTask.Material) && i.Id == educationTask.Id);
if (finded != null)
{
_educationTaskProvider.Update(educationTask);
}
else
{
_educationTaskProvider.Create(educationTask);
}
}
public StudentEducationTask Examine(StudentEducationTask task, IEnumerable <KeyValuePair <TaskQuestion, string> > answers)
{
var list = new List <KeyValuePair <TaskQuestion, bool> >();
foreach (var question in task.Questions)
{
var answer = answers.FirstOrDefault(i => i.Key.Equals(question));
if (answer.Key != null && question.IsCorrect(answer.Value))
{
list.Add(new KeyValuePair <TaskQuestion, bool>(answer.Key, true));
}
else
{
list.Add(new KeyValuePair <TaskQuestion, bool>(answer.Key, false));
}
}
double mark = 5.0 / list.Count * list.Where(i => i.Value == true).Count();
return(new StudentEducationTask(task.Id, task.Student, task.Material, task.Questions,
new EducationTaskSolution(task, list, (int)Math.Ceiling(mark != 0 ? mark : 1))));
}
public TaskDetailsWindowViewModel(StudentEducationTask task, IEducationTasksManager tasksManager, IEducationTaskExaminationManager examination)
{
Theme = task.Material.Theme;
_random = new Random();
Questions = new ObservableCollection <QuestionSelectorViewModel>(task.Questions.Select(i => new QuestionSelectorViewModel(i, _random)));
CurrentQuestion = Questions.First();
_prev = new DelegateCommand(() => {
var index = Questions.IndexOf(CurrentQuestion);
if (index > 0)
{
CurrentQuestion.Check();
CurrentQuestion = Questions[--index];
CurrentQuestionNumber = ++index;
}
}, () => CurrentQuestionNumber - 1 > 0);
_next = new DelegateCommand(() => {
var index = Questions.IndexOf(CurrentQuestion);
if (index < Questions.Count - 1)
{
CurrentQuestion.Check();
CurrentQuestion = Questions[++index];
CurrentQuestionNumber = ++index;
}
}, () => CurrentQuestionNumber - 1 < Questions.Count - 1);
Finish = new DelegateCommand(() => {
var result = examination.Examine(task, Questions.Select(i => new KeyValuePair <TaskQuestion, string>(task.Questions.FirstOrDefault(j => j.Question.Trim() == i.Question.Trim()), i.CurrentAnswer)));
tasksManager.Insert(result);
if (ViewService.GetIfOpened(out var view, this))
{
view.Close();
ViewService.Message($"Ваша оценка {result.Solution.Mark}");
}
});
SelectAnswer = new DelegateCommand <string>((param) => CurrentQuestion.CurrentAnswer = param);
CurrentQuestionNumber = 1;
}
public SolutionWindowViewModel(StudentEducationTask task)
{
_task = task;
Answers = new List <AnswerViewModel>(_task.Solution.Questions.Select(i => new AnswerViewModel(i)));
}
public TaskDetailsWindowViewModel TaskDetailsWindowViewModel(StudentEducationTask task) => new TaskDetailsWindowViewModel(task, _tasksManager, _education);
