src/Tizen.NUI/src/internal/XamlBinding/DataTemplate.cs

   1 using System;
   2 using System.Collections.Generic;
   3
   4 namespace Tizen.NUI.Binding
   5 {
   6     internal class DataTemplate : ElementTemplate
   7     {
   8         public DataTemplate()
   9         {
  10         }
  11
  12         public DataTemplate(Type type) : base(type)
  13         {
  14         }
  15
  16         public DataTemplate(Func<object> loadTemplate) : base(loadTemplate)
  17         {
  18         }
  19
  20         public IDictionary<BindableProperty, BindingBase> Bindings { get; } = new Dictionary<BindableProperty, BindingBase>();
  21
  22         public IDictionary<BindableProperty, object> Values { get; } = new Dictionary<BindableProperty, object>();
  23
  24         public void SetBinding(BindableProperty property, BindingBase binding)
  25         {
  26             if (property == null)
  27                 throw new ArgumentNullException(nameof(property));
  28             if (binding == null)
  29                 throw new ArgumentNullException(nameof(binding));
  30
  31             Values.Remove(property);
  32             Bindings[property] = binding;
  33         }
  34
  35         public void SetValue(BindableProperty property, object value)
  36         {
  37             if (property == null)
  38                 throw new ArgumentNullException(nameof(property));
  39
  40             Bindings.Remove(property);
  41             Values[property] = value;
  42         }
  43
  44         internal override void SetupContent(object item)
  45         {
  46             ApplyBindings(item);
  47             ApplyValues(item);
  48         }
  49
  50         void ApplyBindings(object item)
  51         {
  52             if (Bindings == null)
  53                 return;
  54
  55             var bindable = item as BindableObject;
  56             if (bindable == null)
  57                 return;
  58
  59             foreach (KeyValuePair<BindableProperty, BindingBase> kvp in Bindings)
  60             {
  61                 if (Values.ContainsKey(kvp.Key))
  62                     throw new InvalidOperationException("Binding and Value found for " + kvp.Key.PropertyName);
  63
  64                 bindable.SetBinding(kvp.Key, kvp.Value.Clone());
  65             }
  66         }
  67
  68         void ApplyValues(object item)
  69         {
  70             if (Values == null)
  71                 return;
  72
  73             var bindable = item as BindableObject;
  74             if (bindable == null)
  75                 return;
  76             foreach (KeyValuePair<BindableProperty, object> kvp in Values)
  77                 bindable.SetValue(kvp.Key, kvp.Value);
  78         }
  79     }
  80 }