Working on PPC optimizations...

1 files changed, 55 insertions, 0 deletions

diff --git a/Software/Visual_Studio/Tango.Touch/Components/SharedResourceDictionary.cs b/Software/Visual_Studio/Tango.Touch/Components/SharedResourceDictionary.cs
new file mode 100644
index 000000000..efa1e77e4
--- /dev/null
+++ b/Software/Visual_Studio/Tango.Touch/Components/SharedResourceDictionary.cs
@@ -0,0 +1,55 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows;
+
+namespace Tango.Touch.Components
+{
+    /// <summary>
+    /// The shared resource dictionary is a specialized resource dictionary
+    /// that loads it content only once. If a second instance with the same source
+    /// is created, it only merges the resources from the cache.
+    /// </summary>
+    public class SharedResourceDictionary : ResourceDictionary
+    {
+        /// <summary>
+        /// Internal cache of loaded dictionaries 
+        /// </summary>
+        public static Dictionary<Uri, ResourceDictionary> _sharedDictionaries =
+            new Dictionary<Uri, ResourceDictionary>();
+
+        /// <summary>
+        /// Local member of the source uri
+        /// </summary>
+        private Uri _sourceUri;
+
+        /// <summary>
+        /// Gets or sets the uniform resource identifier (URI) to load resources from.
+        /// </summary>
+        public new Uri Source
+        {
+            get { return _sourceUri; }
+            set
+            {
+                _sourceUri = value;
+
+                if (!_sharedDictionaries.ContainsKey(value))
+                {
+                    // If the dictionary is not yet loaded, load it by setting
+                    // the source of the base class
+                    base.Source = value;
+
+                    // add it to the cache
+                    _sharedDictionaries.Add(value, this);
+                }
+                else
+                {
+                    // If the dictionary is already loaded, get it from the cache
+                    MergedDictionaries.Add(_sharedDictionaries[value]);
+                }
+            }
+        }
+    }
+}