src/Tizen.NUI/src/public/Template/DataTemplate.cs

   1 using System;
   2 using System.ComponentModel;
   3 using System.Collections.Generic;
   4
   5 namespace Tizen.NUI.Binding
   6 {
   7     [EditorBrowsable(EditorBrowsableState.Never)]
   8     public class DataTemplate : ElementTemplate
   9     {
  10         /// <summary>
  11         /// Base constructor.
  12         /// </summary>
  13         [EditorBrowsable(EditorBrowsableState.Never)]
  14         public DataTemplate()
  15         {
  16         }
  17
  18         /// <summary>
  19         /// Base constructor with specific Type.
  20         /// </summary>
  21         /// <param name="Type">The Type of content.</param>
  22         [EditorBrowsable(EditorBrowsableState.Never)]
  23         public DataTemplate(Type type) : base(type)
  24         {
  25         }
  26
  27         /// <summary>
  28         /// Base constructor with loadTemplate function.
  29         /// </summary>
  30         /// <param name="loadTemplate">The function of loading templated object.</param>
  31         [EditorBrowsable(EditorBrowsableState.Never)]
  32         public DataTemplate(Func<object> loadTemplate) : base(loadTemplate)
  33         {
  34         }
  35
  36         [EditorBrowsable(EditorBrowsableState.Never)]
  37         public IDictionary<BindableProperty, BindingBase> Bindings { get; } = new Dictionary<BindableProperty, BindingBase>();
  38
  39         [EditorBrowsable(EditorBrowsableState.Never)]
  40         public IDictionary<BindableProperty, object> Values { get; } = new Dictionary<BindableProperty, object>();
  41
  42         [EditorBrowsable(EditorBrowsableState.Never)]
  43         public void SetBinding(BindableProperty property, BindingBase binding)
  44         {
  45             if (property == null)
  46                 throw new ArgumentNullException(nameof(property));
  47             if (binding == null)
  48                 throw new ArgumentNullException(nameof(binding));
  49
  50             Values.Remove(property);
  51             Bindings[property] = binding;
  52         }
  53
  54         [EditorBrowsable(EditorBrowsableState.Never)]
  55         public void SetValue(BindableProperty property, object value)
  56         {
  57             if (property == null)
  58                 throw new ArgumentNullException(nameof(property));
  59
  60             Bindings.Remove(property);
  61             Values[property] = value;
  62         }
  63
  64         internal override void SetupContent(object item)
  65         {
  66             ApplyBindings(item);
  67             ApplyValues(item);
  68         }
  69
  70         void ApplyBindings(object item)
  71         {
  72             if (Bindings == null)
  73                 return;
  74
  75             var bindable = item as BindableObject;
  76             if (bindable == null)
  77                 return;
  78
  79             foreach (KeyValuePair<BindableProperty, BindingBase> kvp in Bindings)
  80             {
  81                 if (Values.ContainsKey(kvp.Key))
  82                     throw new InvalidOperationException("Binding and Value found for " + kvp.Key.PropertyName);
  83
  84                 bindable.SetBinding(kvp.Key, kvp.Value.Clone());
  85             }
  86         }
  87
  88         void ApplyValues(object item)
  89         {
  90             if (Values == null)
  91                 return;
  92
  93             var bindable = item as BindableObject;
  94             if (bindable == null)
  95                 return;
  96             foreach (KeyValuePair<BindableProperty, object> kvp in Values)
  97                 bindable.SetValue(kvp.Key, kvp.Value);
  98         }
  99     }
 100 }