Xamarin.Forms.Pages/DataItem.cs

   1 using System.ComponentModel;
   2 using System.Runtime.CompilerServices;
   3
   4 namespace Xamarin.Forms.Pages
   5 {
   6         public class DataItem : IDataItem, INotifyPropertyChanged
   7         {
   8                 string _name;
   9                 object _val;
  10
  11                 public DataItem()
  12                 {
  13                 }
  14
  15                 public DataItem(string name, object value)
  16                 {
  17                         _name = name;
  18                         _val = value;
  19                 }
  20
  21                 public string Name
  22                 {
  23                         get { return _name; }
  24                         set
  25                         {
  26                                 if (_name == value)
  27                                         return;
  28                                 _name = value;
  29                                 OnPropertyChanged();
  30                         }
  31                 }
  32
  33                 public object Value
  34                 {
  35                         get { return _val; }
  36                         set
  37                         {
  38                                 if (_val == value)
  39                                         return;
  40                                 _val = value;
  41                                 OnPropertyChanged();
  42                         }
  43                 }
  44
  45                 public event PropertyChangedEventHandler PropertyChanged;
  46
  47                 public override bool Equals(object obj)
  48                 {
  49                         if (ReferenceEquals(null, obj))
  50                                 return false;
  51                         if (ReferenceEquals(this, obj))
  52                                 return true;
  53                         if (obj.GetType() != GetType())
  54                                 return false;
  55                         return Equals((DataItem)obj);
  56                 }
  57
  58                 public override int GetHashCode()
  59                 {
  60                         unchecked
  61                         {
  62                                 return ((_name?.GetHashCode() ?? 0) * 397) ^ (_val?.GetHashCode() ?? 0);
  63                         }
  64                 }
  65
  66                 public static bool operator ==(DataItem left, DataItem right)
  67                 {
  68                         return Equals(left, right);
  69                 }
  70
  71                 public static bool operator !=(DataItem left, DataItem right)
  72                 {
  73                         return !Equals(left, right);
  74                 }
  75
  76                 protected bool Equals(DataItem other)
  77                 {
  78                         return string.Equals(_name, other._name) && Equals(_val, other._val);
  79                 }
  80
  81                 protected virtual void OnPropertyChanged([CallerMemberName] string propertyName = null)
  82                 {
  83                         PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
  84                 }
  85         }
  86 }