/// <summary>
/// Creates a new VisualTreeWalkerTimer with the given <see cref="IVisualTreeWalker"/> as walker that will being used for scanning.
/// The milliSeconds parameter will be used to determine the frequency of the scanning.
/// </summary>
/// <param name="visualTreeWalker">The <see cref="IVisualTreeWalker"/> that will be used for scanning.</param>
/// <param name="milliSeconds">The amount of milliseconds between scans.</param>
public VisualTreeWalkerTimer(IVisualTreeWalker visualTreeWalker, int milliSeconds)
{
if (milliSeconds <= 0)
{
throw new ArgumentException("Parameter milliSeconds must be strictly positive.", nameof(milliSeconds));
}
this.visualTreeWalker = visualTreeWalker ?? throw new ArgumentNullException(nameof(visualTreeWalker));
timer = new DispatcherTimer();
timer.Tick += Timer_Tick;
timer.Interval = TimeSpan.FromMilliseconds(milliSeconds);
}
/// <summary>
/// Creates a new VisualTreeWalkerTimer with the given <see cref="IVisualTreeWalker"/> as walker that will being used for scanning.
/// A scan will occur every 5 seconds.
/// </summary>
/// <param name="visualTreeWalker">The <see cref="IVisualTreeWalker"/> that will be used for scanning.</param>
public VisualTreeWalkerTimer(IVisualTreeWalker visualTreeWalker) : this(visualTreeWalker, 5000)
{
}