using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Tango.Video.DirectCapture
{
    /// <summary>
    /// Used to hold a frame rate value for a CaptureDevice.
    /// </summary>
    public class FrameRate : INotifyPropertyChanged
    {
        /// <summary>
        /// Initializses a new instance of FrameRate.
        /// </summary>
        public FrameRate()
        {

        }

        /// <summary>
        /// Initializes a new FrameRate instance.
        /// </summary>
        /// <param name="rate">The frame rate.</param>
        public FrameRate(double rate)
            : this()
        {
            Rate = rate;
        }

        private double _rate;

        /// <summary>
        /// Gets or sets the current frame rate.
        /// </summary>
        public double Rate
        {
            get { return _rate; }
            set { _rate = value; RaisePropertyChanged("Rate"); }
        }

        /// <summary>
        /// Returns a strings representation of the current frame rate.
        /// </summary>
        /// <returns>Frame rate.</returns>
        public override string ToString()
        {
            return Rate.ToString("0.#") + " fps"; 
        }

        private void RaisePropertyChanged(String propName)
        {
            if (PropertyChanged != null) PropertyChanged(this, new PropertyChangedEventArgs(propName));
        }

        public event PropertyChangedEventHandler PropertyChanged;
    }
}