/*
* Aiding methods
*
*/
private void UncheckOverreplies()
{
ListBox answersListbox = this.FindControl <ListBox>("lst_answers");
QuizScreenViewModel dataContext = (QuizScreenViewModel)answersListbox.DataContext;
int maxAllowedAnswers = dataContext.CurrentQuestion.NumberOfRightAnswers;
int selectedAnswers = answersListbox.SelectedItems.Count;
dataContext.SelectedAnswers = answersListbox.SelectedItems;
if (selectedAnswers > maxAllowedAnswers)
{
answersListbox.SelectedItems.RemoveAt(0);
}
}
private void QuizScreenUserControl_PointerReleased(object sender, Avalonia.Input.PointerReleasedEventArgs e)
{
UserControl quizUserControl = (UserControl)sender;
QuizScreenViewModel dataContext = (QuizScreenViewModel)quizUserControl.DataContext;
if (e.InitialPressMouseButton == Avalonia.Input.MouseButton.Middle)
{
dataContext.ShowAnswers();
}
// Got focus again on the whole UserControl
UserControl quizScreenUserControl = this.FindControl <UserControl>("quizScreenUserControl");
quizScreenUserControl.Focus();
}
private void QuizScreenUserControl_KeyUp(object sender, Avalonia.Input.KeyEventArgs e)
{
e.Route = Avalonia.Interactivity.RoutingStrategies.Tunnel;
UserControl quizUserControl = (UserControl)sender;
QuizScreenViewModel dataContext = (QuizScreenViewModel)quizUserControl.DataContext;
Avalonia.Input.Key pressedKey = e.Key;
int pressedKeyIntCode = (int)pressedKey;
if (pressedKey == Avalonia.Input.Key.Space || pressedKey == Avalonia.Input.Key.NumPad0)
{
dataContext.ShowAnswers();
}
else if (pressedKey == Avalonia.Input.Key.Right || pressedKey == Avalonia.Input.Key.Enter)
{
dataContext.NextQuestion();
}
else if (pressedKey == Avalonia.Input.Key.Escape)
{
dataContext.TerminateQuiz();
}
else
{
// Select answer based on what number I pressed on the keyboard
// CHECK: Is the quiz ended?
if (dataContext.CurrentQuiz.GetUnansweredQuestion() is null)
{
return;
}
// 35 - "1" on keyboard, 43 - "9" on keyboard
bool keyboardNumberPressed = (pressedKeyIntCode >= 35 && pressedKeyIntCode <= 43);
// 75 - "1" on numeric keypad, 83 - "9" on numeric keypad
bool numpadNumberPressed = (pressedKeyIntCode >= 75 && pressedKeyIntCode <= 83);
if (keyboardNumberPressed || numpadNumberPressed)
{
//
int choosedAnswerNumber = keyboardNumberPressed ? pressedKeyIntCode - 34 : pressedKeyIntCode - 74;
ListBox answersListbox = this.FindControl <ListBox>("lst_answers");
List <AnswerSheet> answerList = (List <AnswerSheet>)answersListbox.Items;
if (!(choosedAnswerNumber > answerList.Count))
{
int choosedAnswerListIndex = choosedAnswerNumber - 1;
AnswerSheet choosedAnswerSheet = answerList[choosedAnswerListIndex];
if (answersListbox.SelectedItems.Contains(choosedAnswerSheet))
{
answersListbox.SelectedItems.Remove(choosedAnswerSheet);
}
else
{
answersListbox.SelectedItems.Add(choosedAnswerSheet);
UncheckOverreplies();
}
dataContext.SelectedAnswers = answersListbox.SelectedItems;
}
}
}
// Got focus again on the whole UserControl
UserControl quizScreenUserControl = this.FindControl <UserControl>("quizScreenUserControl");
quizScreenUserControl.Focus();
e.Handled = true;
}