Class GameViewModel

Namespace

Tudormobile.OpenTrivia.UI.ViewModels

Assembly

Tudormobile.OpenTrivia.UI.dll

Represents the view model for managing quiz categories and questions, supporting selection of a single question at a time.

public class GameViewModel : ObservableObject, INotifyPropertyChanged, INotifyPropertyChanging

Inheritance

object

ObservableObject

GameViewModel

Implements

INotifyPropertyChanged

INotifyPropertyChanging

Inherited Members

ObservableObject.OnPropertyChanged(PropertyChangedEventArgs)

ObservableObject.OnPropertyChanging(PropertyChangingEventArgs)

ObservableObject.OnPropertyChanged(string)

ObservableObject.OnPropertyChanging(string)

ObservableObject.SetProperty<T>(ref T, T, string)

ObservableObject.SetProperty<T>(ref T, T, IEqualityComparer<T>, string)

ObservableObject.SetProperty<T>(T, T, Action<T>, string)

ObservableObject.SetProperty<T>(T, T, IEqualityComparer<T>, Action<T>, string)

ObservableObject.SetProperty<TModel, T>(T, T, TModel, Action<TModel, T>, string)

ObservableObject.SetProperty<TModel, T>(T, T, IEqualityComparer<T>, TModel, Action<TModel, T>, string)

ObservableObject.SetPropertyAndNotifyOnCompletion(ref ObservableObject.TaskNotifier, Task, string)

ObservableObject.SetPropertyAndNotifyOnCompletion(ref ObservableObject.TaskNotifier, Task, Action<Task>, string)

ObservableObject.SetPropertyAndNotifyOnCompletion<T>(ref ObservableObject.TaskNotifier<T>, Task<T>, string)

ObservableObject.SetPropertyAndNotifyOnCompletion<T>(ref ObservableObject.TaskNotifier<T>, Task<T>, Action<Task<T>>, string)

ObservableObject.PropertyChanged

ObservableObject.PropertyChanging

object.GetType()

object.MemberwiseClone()

object.ToString()

object.Equals(object)

object.Equals(object, object)

object.ReferenceEquals(object, object)

object.GetHashCode()

Remarks

This view model exposes collections of selectable categories and questions, and ensures that only one question can be selected at any given time. Property change notifications are raised when the selected question changes, enabling data binding scenarios in UI frameworks.

Constructors

GameViewModel(TriviaGame)

Initializes a new instance of the GameViewModel class using the questions provided by the specified TriviaGame.

public GameViewModel(TriviaGame game)

Parameters

game TriviaGame

The TriviaGame instance containing the collection of questions to be used in the GameViewModel. Cannot be null.

GameViewModel(QuestionCollection)

Initializes a new instance of the GameViewModel class using the specified collection of questions.

public GameViewModel(QuestionCollection questions)

Parameters

questions QuestionCollection

The collection of questions to associate with the view model. Cannot be null.

Remarks

The constructor subscribes to the PropertyChanged event of each question in the collection to monitor property updates. The provided questions are also used to populate the categories and are ordered by their question number.

Properties

Categories

Gets the collection of categories that can be selected by the user.

public IReadOnlyList<SelectableCategory> Categories { get; }

Property Value

IReadOnlyList<SelectableCategory>

Remarks

Use this property to access the available categories for selection. The collection is read-only and each category represents a distinct grouping that can be used for organizing or filtering items.

Questions

Gets the collection of questions that can be selected by the user.

public IReadOnlyList<SelectableQuestion> Questions { get; }

Property Value

IReadOnlyList<SelectableQuestion>

Remarks

The returned collection is read-only and reflects the set of selectable questions available in the current application context. The contents of the collection may change depending on the application's state.

ResetGameCommand

Gets an IRelayCommand instance wrapping Tudormobile.OpenTrivia.UI.ViewModels.GameViewModel.ResetGame.

[ExcludeFromCodeCoverage]
public IRelayCommand ResetGameCommand { get; }

Property Value

IRelayCommand

Score

[ObservableProperty]
[ExcludeFromCodeCoverage]
public int Score { get; }

Property Value

int

SelectedQuestion

Gets or sets the currently selected question in the user interface.

public SelectableQuestion? SelectedQuestion { get; }

Property Value

SelectableQuestion

Remarks

The selected question can be used to display additional details or perform actions related to that question. This property may be null if no question is selected.