/// <summary>
/// Handles the event when the <see cref="SelectedPopulationIndex"/> property changes.
/// </summary>
/// <param name="obj">The <see cref="DependencyObject"/> that owns the property.</param>
/// <param name="e">The <see cref="DependencyPropertyChangedEventArgs"/> associated with the event.</param>
private static void OnSelectedPopulationIndexChanged(DependencyObject obj, DependencyPropertyChangedEventArgs e)
{
PopulationSelector selector = (PopulationSelector)obj;
int index = (int)e.NewValue;
if (selector.Environment == null || index < 0 || index >= selector.Environment.Populations.Count)
{
selector.SelectedPopulation = null;
}
else
{
selector.SelectedPopulation = selector.Environment.Populations[(int)e.NewValue];
}
}
/// <summary>
/// Handles the event when the <see cref="Environment"/> property changes.
/// </summary>
/// <param name="obj">The <see cref="DependencyObject"/> that owns the property.</param>
/// <param name="e">The <see cref="DependencyPropertyChangedEventArgs"/> associated with the event.</param>
private static void OnEnvironmentChanged(DependencyObject obj, DependencyPropertyChangedEventArgs e)
{
PopulationSelector selector = (PopulationSelector)obj;
if (e.OldValue != null)
{
GeneticEnvironment environment = (GeneticEnvironment)e.OldValue;
environment.Populations.CollectionChanged -= selector.Populations_CollectionChanged;
selector.isSelectedPopulationInitialized = false;
selector.SelectedPopulationIndex = -1;
}
if (e.NewValue != null)
{
GeneticEnvironment environment = (GeneticEnvironment)e.NewValue;
environment.Populations.CollectionChanged += selector.Populations_CollectionChanged;
if (environment.Populations.Any())
{
selector.TryInitializeSelectedPopulation();
}
}
}
