protected void VerifyValidDelegation(INotifyPropertyChanged foreignObject, string foreignProperty,
string[] localProperties)
{
#if DEBUG
VerifyPropertyExists.InDebugBuilds(this, localProperties);
if (foreignObject == null)
{
throw new InvalidOperationException("Delegation to a null object");
}
VerifyPropertyExists.InDebugBuilds(foreignObject, foreignProperty);
#endif
}
public static void WhenMemberChangesOnce(this INotifyPropertyChanged target, string member, Action action)
{
VerifyPropertyExists.InDebugBuilds((object)target, member);
void method(object s, PropertyChangedEventArgs e)
{
if (e.PropertyName.Equals(member, StringComparison.Ordinal))
{
action();
target.PropertyChanged -= method;
}
};
target.PropertyChanged += method;
}
public static Action WhenMemberChanges(this INotifyPropertyChanged target, string member, Action action)
{
VerifyPropertyExists.InDebugBuilds((object)target, member);
PropertyChangedEventHandler method = (s, e) =>
{
if (e.PropertyName.Equals(member, StringComparison.Ordinal))
{
action();
}
};
target.PropertyChanged += method;
return(() => target.PropertyChanged -= method);
}
/// <summary>
/// Notifies subscribers of the property change.
/// </summary>
/// <param name = "propertyName">SheetName of the property.</param>
protected void OnPropertyChanged(string propertyName)
{
VerifyPropertyExists.InDebugBuilds(this, propertyName);
PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
}