src/ElmSharp/ElmSharp/ItemObject.cs

   1 using System;
   2 using System.Collections.Generic;
   3 using System.Linq;
   4 using System.Text;
   5 using System.Threading.Tasks;
   6
   7 namespace ElmSharp
   8 {
   9     public class ItemObject
  10     {
  11         private static Dictionary<int, ItemObject> s_IdToItemTable = new Dictionary<int, ItemObject>();
  12         private static Dictionary<IntPtr, ItemObject> s_HandleToItemTable = new Dictionary<IntPtr, ItemObject>();
  13         private static int s_globalId = 0;
  14
  15         Interop.Evas.SmartCallback _deleteCallback;
  16         IntPtr _handle = IntPtr.Zero;
  17
  18         protected ItemObject(IntPtr handle)
  19         {
  20             _deleteCallback = DeleteCallbackHandler;
  21             Id = GetNextId();
  22             s_IdToItemTable[Id] = this;
  23             Handle = handle;
  24         }
  25
  26         // C# Finalizer was called on GC thread
  27         // So, We can't access to EFL object
  28         // And When Finalizer was called, Field can be already released.
  29         //~ItemObject()
  30         //{
  31         //    if (Handle != IntPtr.Zero)
  32         //        Interop.Elementary.elm_object_item_del(Handle);
  33         //}
  34
  35         public int Id { get; private set; }
  36
  37         public bool IsEnabled
  38         {
  39             get { return !Interop.Elementary.elm_object_item_disabled_get(Handle); }
  40             set { Interop.Elementary.elm_object_item_disabled_set(Handle, !value); }
  41         }
  42
  43         internal IntPtr Handle
  44         {
  45             get
  46             {
  47                 return _handle;
  48             }
  49             set
  50             {
  51                 if (_handle == value)
  52                     return;
  53
  54                 if (_handle != IntPtr.Zero)
  55                 {
  56                     UnsetDeleteCallback();
  57                 }
  58                 _handle = value;
  59                 SetDeleteCallback();
  60                 s_HandleToItemTable[Handle] = this;
  61             }
  62         }
  63
  64         public event EventHandler Deleted;
  65
  66         public void Delete()
  67         {
  68             Interop.Elementary.elm_object_item_del(Handle);
  69             _handle = IntPtr.Zero;
  70         }
  71
  72         public void SetPartContent(string part, EvasObject content)
  73         {
  74             SetPartContent(part, content, false);
  75         }
  76
  77         public void SetPartContent(string part, EvasObject content, bool preserveOldContent)
  78         {
  79             if (preserveOldContent)
  80             {
  81                 Interop.Elementary.elm_object_item_part_content_unset(Handle, part);
  82             }
  83             Interop.Elementary.elm_object_item_part_content_set(Handle, part, content);
  84         }
  85
  86         public void SetPartText(string part, string text)
  87         {
  88             Interop.Elementary.elm_object_item_part_text_set(Handle, part, text);
  89         }
  90
  91         public string GetPartText(string part)
  92         {
  93             return Interop.Elementary.elm_object_item_part_text_get(Handle, part);
  94         }
  95
  96         public static implicit operator IntPtr(ItemObject obj)
  97         {
  98             if (obj == null)
  99                 return IntPtr.Zero;
 100             return obj.Handle;
 101         }
 102
 103         protected virtual void OnInvalidate() { }
 104
 105         internal static ItemObject GetItemById(int id)
 106         {
 107             ItemObject value;
 108             s_IdToItemTable.TryGetValue(id, out value);
 109             return value;
 110         }
 111
 112         internal static ItemObject GetItemByHandle(IntPtr handle)
 113         {
 114             ItemObject value;
 115             s_HandleToItemTable.TryGetValue(handle, out value);
 116             return value;
 117         }
 118
 119         void DeleteCallbackHandler(IntPtr data, IntPtr obj, IntPtr info)
 120         {
 121             Deleted?.Invoke(this, EventArgs.Empty);
 122             OnInvalidate();
 123             if (s_IdToItemTable.ContainsKey(Id))
 124             {
 125                 s_IdToItemTable.Remove(Id);
 126             }
 127             if (s_HandleToItemTable.ContainsKey(_handle))
 128             {
 129                 s_HandleToItemTable.Remove(_handle);
 130             }
 131             _handle = IntPtr.Zero;
 132         }
 133
 134         void UnsetDeleteCallback()
 135         {
 136             Interop.Elementary.elm_object_item_del_cb_set(Handle, null);
 137         }
 138
 139         void SetDeleteCallback()
 140         {
 141             if (Handle != IntPtr.Zero)
 142                 Interop.Elementary.elm_object_item_del_cb_set(Handle, _deleteCallback);
 143         }
 144
 145         static int GetNextId()
 146         {
 147             return s_globalId++;
 148         }
 149     }
 150 }