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

   1 using System;
   2
   3 namespace Tizen.NUI.Binding
   4 {
   5     internal abstract class Condition
   6     {
   7         Action<BindableObject, bool, bool> _conditionChanged;
   8
   9         bool _isSealed;
  10
  11         internal Condition()
  12         {
  13         }
  14
  15         internal Action<BindableObject, bool, bool> ConditionChanged
  16         {
  17             get { return _conditionChanged; }
  18             set
  19             {
  20                 if (_conditionChanged == value)
  21                     return;
  22                 if (_conditionChanged != null)
  23                     throw new InvalidOperationException("The same condition instance can not be reused");
  24                 _conditionChanged = value;
  25             }
  26         }
  27
  28         internal bool IsSealed
  29         {
  30             get { return _isSealed; }
  31             set
  32             {
  33                 if (_isSealed == value)
  34                     return;
  35                 if (!value)
  36                     throw new InvalidOperationException("What is sealed can not be unsealed.");
  37                 _isSealed = value;
  38                 OnSealed();
  39             }
  40         }
  41
  42         internal abstract bool GetState(BindableObject bindable);
  43
  44         internal virtual void OnSealed()
  45         {
  46         }
  47
  48         internal abstract void SetUp(BindableObject bindable);
  49         internal abstract void TearDown(BindableObject bindable);
  50     }
  51 }