src/Tizen.NUI/src/internal/XamlBinding/Interactivity/Behavior.cs

   1 using System;
   2 using System.Reflection;
   3
   4 namespace Tizen.NUI.Binding
   5 {
   6     internal abstract class Behavior : BindableObject, IAttachedObject
   7     {
   8         internal Behavior(Type associatedType)
   9         {
  10             if (associatedType == null)
  11                 throw new ArgumentNullException("associatedType");
  12             AssociatedType = associatedType;
  13         }
  14
  15         protected Type AssociatedType { get; }
  16
  17         void IAttachedObject.AttachTo(BindableObject bindable)
  18         {
  19             if (bindable == null)
  20                 throw new ArgumentNullException("bindable");
  21             if (!AssociatedType.IsInstanceOfType(bindable))
  22                 throw new InvalidOperationException("bindable not an instance of AssociatedType");
  23             OnAttachedTo(bindable);
  24         }
  25
  26         void IAttachedObject.DetachFrom(BindableObject bindable)
  27         {
  28             OnDetachingFrom(bindable);
  29         }
  30
  31         protected virtual void OnAttachedTo(BindableObject bindable)
  32         {
  33         }
  34
  35         protected virtual void OnDetachingFrom(BindableObject bindable)
  36         {
  37         }
  38     }
  39
  40     internal abstract class Behavior<T> : Behavior where T : BindableObject
  41     {
  42         protected Behavior() : base(typeof(T))
  43         {
  44         }
  45
  46         protected override void OnAttachedTo(BindableObject bindable)
  47         {
  48             base.OnAttachedTo(bindable);
  49             OnAttachedTo((T)bindable);
  50         }
  51
  52         protected virtual void OnAttachedTo(T bindable)
  53         {
  54         }
  55
  56         protected override void OnDetachingFrom(BindableObject bindable)
  57         {
  58             OnDetachingFrom((T)bindable);
  59             base.OnDetachingFrom(bindable);
  60         }
  61
  62         protected virtual void OnDetachingFrom(T bindable)
  63         {
  64         }
  65     }
  66 }