105 lines
2.9 KiB
C#
105 lines
2.9 KiB
C#
using System;
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using System.ComponentModel;
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using System.Runtime.CompilerServices;
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using System.Threading.Tasks;
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using Aurora.Models.Media;
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using Xamarin.Forms;
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using Aurora.Design.Views.Main;
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namespace Aurora.Design.Views
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{
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public class BaseViewModel : INotifyPropertyChanged
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{
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public BaseViewModel()
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{
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}
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#region Player
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/// <summary>
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/// Command event handler for player play button
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/// </summary>
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public virtual void OnPlayButtonCommandExecute() { }
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public virtual bool CanPlayButtonCommandExecute()
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{
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return true;
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}
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/// <summary>
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/// Command event handler for player next button
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/// </summary>
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public virtual void OnNextButtonExecute() { }
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public virtual bool CanNextButtonCommandExecute()
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{
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return true;
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}
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/// <summary>
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/// Command event handler for player previous button
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/// </summary>
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public virtual void OnPreviousButtonExecute() { }
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public virtual bool CanPreviousButtonCommandExecute()
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{
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return true;
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}
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/// <summary>
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/// Delegate for interacting with main screen player control
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/// </summary>
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/// <value></value>
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public SetPlayerDelegate ChangePlayerState { get; set; }
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/// <summary>
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/// Delegate for checking if main screen player control is currently playing
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/// </summary>
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/// <value></value>
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public GetIsPlayingDelegate IsPlaying { get; set; }
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public ShowModalDelegate ShowModal { get; set; }
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public HideModalDelegate HideModal { get; set; }
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#endregion Player
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#region Lifecycle
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/// <summary>
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/// Called by main screen on view appearing
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/// </summary>
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/// <typeparam name="object"></typeparam>
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/// <returns></returns>
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public virtual Task OnActive() { return Task.FromResult<object>(null); }
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/// <summary>
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/// Called by main screen on view disappearing
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/// </summary>
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/// <typeparam name="object"></typeparam>
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/// <returns></returns>
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public virtual Task OnInactive() { return Task.FromResult<object>(null); }
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#endregion
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#region INotifyPropertyChanged Implementation
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public bool SetProperty<T>(ref T storage, T value, [CallerMemberName] string propertyName = null)
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{
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if (Object.Equals(storage, value))
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return false;
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storage = value;
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OnPropertyChanged(propertyName);
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return true;
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}
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public event PropertyChangedEventHandler PropertyChanged;
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public void OnPropertyChanged([CallerMemberName] string propertyName = "")
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{
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if (PropertyChanged == null)
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return;
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PropertyChanged.Invoke(this, new PropertyChangedEventArgs(propertyName));
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}
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#endregion
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}
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}
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