sharee.bike-App/TINKLib/ViewModel/Settings/PollingViewModel.cs

using System;
using System.ComponentModel;
using TINK.Settings;

namespace TINK.ViewModel.Settings
{
    /// <summary> Polling relagted parameters</summary>
    public class PollingViewModel : INotifyPropertyChanged
    {
        /// <summary>Holds the views polling parameters.</summary>
        private PollingParameters m_oPolling = PollingParameters.Default;

        /// <summary> Current polling periode. Used to check whether values were modified or not.</summary>
        private readonly PollingParameters m_oPollingActive;

        /// <summary> Constructs polling object. </summary>
        /// <param name="p_oSource">Object to construct from</param>
        public PollingViewModel(PollingParameters p_oSource)
        {
            m_oPollingActive = p_oSource
                ?? throw new ArgumentException("Can not instantiate polling parameters view model- object. Polling parameter object is null.");

            m_oPolling = p_oSource;
        }

        /// <summary> Gets the immutable version of polling parameters.</summary>
        /// <returns>Polling parameters object.</returns>
        public PollingParameters ToImmutable() { return m_oPolling; }

        /// <summary> Holds value whether polling is activated or not.</summary>
        public bool IsActivated
        {
            get
            {
                return m_oPolling.IsActivated;
            }

            set
            {
                if (value == m_oPolling.IsActivated)
                {
                    // Nothing to do.
                    return;
                }

                m_oPolling = new PollingParameters(m_oPolling.Periode, value);

                PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(nameof(IsActivated)));
                PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(nameof(PeriodeTotalSeconds)));
                PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(nameof(PeriodeTotalSecondsText)));
                PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(nameof(PollingText)));
            }
        }

        /// <summary> Gests or sets the polling periode [sec]. </summary>
        public int PeriodeTotalSeconds
        {
            get
            {
                return (int)m_oPolling.Periode.TotalSeconds;
            }

            set
            {
                if (value == (int)m_oPolling.Periode.TotalSeconds)
                {
                    // Nothing to do.
                    return;
                }

                m_oPolling = new PollingParameters(new TimeSpan(0, 0, value), IsActivated);

                PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(nameof(PeriodeTotalSeconds)));
                PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(nameof(PeriodeTotalSecondsText)));
                PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(nameof(PollingText)));
            }
        }

        /// <summary> Gets info about polling periode.</summary>
        public string PeriodeTotalSecondsText
        {
            get
            {
                if (IsActivated)
                {
                    return $"Polling Periode: {PeriodeTotalSeconds} [Sek.]";
                }

                return $"Polling abgeschalten.";
            }
        }

        /// <summary> Gets the text of the polling related controls.</summary>
        public string PollingText
        {
            get
            {
                if (m_oPolling == m_oPollingActive)
                {
                    return "Polling";
                }

                return "Polling\r\nAnsicht verlassen um Änderungen anzuwenden.";
            }
        }

        /// <summary> Notifies GUI about modified values.</summary>
        public event PropertyChangedEventHandler PropertyChanged;
    }
}