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

   1 using System;
   2 using System.ComponentModel;
   3
   4 namespace Tizen.NUI.Binding
   5 {
   6     /// This will be public opened in tizen_6.0 after ACR done. Before ACR, need to be hidden as inhouse API.
   7     [EditorBrowsable(EditorBrowsableState.Never)]
   8     public abstract class Condition
   9     {
  10         Action<BindableObject, bool, bool> _conditionChanged;
  11
  12         bool _isSealed;
  13
  14         internal Condition()
  15         {
  16         }
  17
  18         internal Action<BindableObject, bool, bool> ConditionChanged
  19         {
  20             get { return _conditionChanged; }
  21             set
  22             {
  23                 if (_conditionChanged == value)
  24                     return;
  25                 if (_conditionChanged != null)
  26                     throw new InvalidOperationException("The same condition instance can not be reused");
  27                 _conditionChanged = value;
  28             }
  29         }
  30
  31         internal bool IsSealed
  32         {
  33             get { return _isSealed; }
  34             set
  35             {
  36                 if (_isSealed == value)
  37                     return;
  38                 if (!value)
  39                     throw new InvalidOperationException("What is sealed can not be unsealed.");
  40                 _isSealed = value;
  41                 OnSealed();
  42             }
  43         }
  44
  45         internal abstract bool GetState(BindableObject bindable);
  46
  47         internal virtual void OnSealed()
  48         {
  49         }
  50
  51         internal abstract void SetUp(BindableObject bindable);
  52         internal abstract void TearDown(BindableObject bindable);
  53     }
  54 }