/// <summary>
/// updates radio buttons content
/// Checks which radio button content to update by checking bettors name
/// or viewing which radio button has been clicked.
/// </summary>
/// <param name="bettor"></param>
/// <returns></returns>
private RadioButton DetermineBettorUi(Bettor bettor)
{
if ((bool)_rbtnBettor1.IsChecked || bettor.Name == "Joe")
{
_rbtnBettor1.Content = $"{bettor.Name} has {bettor.Cash} bucks";
_uiBettor = _rbtnBettor1;
return(_uiBettor);
}
else if ((bool)_rbtnBettor2.IsChecked || bettor.Name == "Bob")
{
_rbtnBettor2.Content = $"{bettor.Name} has {bettor.Cash} bucks";
_uiBettor = _rbtnBettor2;
return(_uiBettor);
}
else if ((bool)_rbtnBettor3.IsChecked || bettor.Name == "Anna")
{
_rbtnBettor3.Content = $"{bettor.Name} has {bettor.Cash} bucks";
return(_uiBettor = _rbtnBettor3);
}
else
{
Debug.Assert(false, "Unexpected bettor selector control. Cannot select the current bettor");
return(null);
}
}
/// <summary>
/// Event handler when the user selects the current bettor using one of the
/// three radio buttons. The same event handler is shared by all three radio
/// buttons to avoid code duplication
/// </summary>
/// <param name="sender">one of the three radio buttons that represent the bettors</param>
/// <param name="e">not used</param>
private void OnBettorSelectorChecked(object sender, RoutedEventArgs e)
{
//check the sender of the event and select the correct bettor in the list
//alternatively you can use the Tag property of the radio buttons by setting
//it to the appropriate bettor object when the objects are created and here use
//only extract the correct bettor from the Tag property value. See the final branch
//for this solution
if (sender == _rbtnBettor1)
{
_crtSelBettor = _bettorList[0];
}
else if (sender == _rbtnBettor2)
{
_crtSelBettor = _bettorList[1];
}
else if (sender == _rbtnBettor3)
{
_crtSelBettor = _bettorList[2];
}
else
{
Debug.Assert(false, "Unexpected bettor selector control. Cannot select the current bettor");
return;
}
//use the current bettor information to display the bet information
_txtCrtBettorName.Text = $"{_crtSelBettor.Name} bets";
}
/// <summary>
/// Checks Bet description and sets it to initial value when program runs
/// and then updates after a bettor has placed a bet
/// </summary>
/// <param name="bettor"></param>
/// <returns></returns>
private TextBlock DetermineBetDescUi(Bettor bettor)
{
_uiBetDesc = new TextBlock();
//checks if a bettor has placed a bet and then updates bettors label
if (bettor.HasPlacedBet == true)
{
_uiBetDesc.Text = $"{bettor.Name} bets {_txtBetAmount.Text}$ on dog #{_cmbRaceHoundNo.SelectedIndex+1}";
return(_uiBetDesc);
}
{
_uiBetDesc.Text = $"{bettor.Name} hasn't placed a bet";
return(_uiBetDesc);
}
}
/// <summary>
/// the follwoing calls DetermineBettorUi and checks which radiobutton has been selected to update
/// it equivalent _txtBet label
/// </summary>
private void UpdateBettorLabels(Bettor bettor)
{
RadioButton radioBettor = DetermineBettorUi(bettor);
if (radioBettor == _rbtnBettor1)
{
_txtBet1.Text = DetermineBetDescUi(bettor).Text;
}
else if (radioBettor == _rbtnBettor2)
{
_txtBet2.Text = DetermineBetDescUi(bettor).Text;
}
else if (radioBettor == _rbtnBettor3)
{
_txtBet3.Text = DetermineBetDescUi(bettor).Text;
}
}
public MainPage()
{
//The current bettor is set by the event handler that is triggered when the
//radio button is checked, which is done in the following call to
//InitializeComponent()
_crtSelBettor = null;
this.InitializeComponent();
//initialize the timer field variable and setup a timer event handler that is called
//at a given time interval
_tmRaceTimer = new DispatcherTimer();
_tmRaceTimer.Tick += OnRaceTimerTick;
_tmRaceTimer.Interval = TimeSpan.FromMilliseconds(25); //TODO: define a constant field variable for 100 and use it here
//create the randomizer for all objects of the form
_formRandomizer = new Random();
//NOTE it is important for the bettors and race hounds to be created AFTER
//the controls have been created by the InitializeComponent() method
CreateBettors();
CreateRaceHounds();
}