/// <summary>
/// Initializes a new instance of the <see cref="UIViewController"/> class.
/// </summary>
public UIViewController()
{
if (CatelEnvironment.IsInDesignMode)
{
return;
}
var viewModelType = GetViewModelType();
if (viewModelType is null)
{
Log.Debug("GetViewModelType() returned null, using the ViewModelLocator to resolve the view model");
viewModelType = _viewModelLocator.ResolveViewModel(GetType());
if (viewModelType is null)
{
const string error = "The view model of the view could not be resolved. Use either the GetViewModelType() method or IViewModelLocator";
Log.Error(error);
throw new NotSupportedException(error);
}
}
_logic = new PageLogic(this, viewModelType);
_logic.TargetViewPropertyChanged += (sender, e) =>
{
OnPropertyChanged(e);
PropertyChanged?.Invoke(this, e);
};
_logic.ViewModelChanged += (sender, e) => RaiseViewModelChanged();
_logic.ViewModelPropertyChanged += (sender, e) =>
{
OnViewModelPropertyChanged(e);
ViewModelPropertyChanged?.Invoke(this, e);
};
_logic.DetermineViewModelInstance += (sender, e) =>
{
e.ViewModel = GetViewModelInstance(e.DataContext);
};
_logic.DetermineViewModelType += (sender, e) =>
{
e.ViewModelType = GetViewModelType(e.DataContext);
};
_logic.ViewLoading += (sender, e) => ViewLoading?.Invoke(this);
_logic.ViewLoaded += (sender, e) => ViewLoaded?.Invoke(this);
_logic.ViewUnloading += (sender, e) => ViewUnloading?.Invoke(this);
_logic.ViewUnloaded += (sender, e) => ViewUnloaded?.Invoke(this);
}
protected virtual void OnViewLoding()
{
ViewLoading?.Invoke(this, EventArgs.Empty);
}