Merge branch 'master' of https://twinetfs.visualstudio.com/Tango/_git/Tango

1 files changed, 53 insertions, 0 deletions

diff --git a/Software/Visual_Studio/PPC/Tango.PPC.Common/ExtensionMethods/ObservableCollectionExtensions.cs b/Software/Visual_Studio/PPC/Tango.PPC.Common/ExtensionMethods/ObservableCollectionExtensions.cs
new file mode 100644
index 000000000..c539273d9
--- /dev/null
+++ b/Software/Visual_Studio/PPC/Tango.PPC.Common/ExtensionMethods/ObservableCollectionExtensions.cs
@@ -0,0 +1,53 @@
+using System;
+using System.Collections.Generic;
+using System.Collections.ObjectModel;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows;
+using System.Windows.Threading;
+
+public static class ObservableCollectionExtensions
+{
+    public static ObservableCollection<T> ToObservableCollectionAsyncIdle<T>(this ObservableCollection<T> source)
+    {
+        var copy = source.ToList();
+        ObservableCollection<T> result = new ObservableCollection<T>();
+
+        foreach (var item in copy)
+        {
+            Application.Current.Dispatcher.BeginInvoke(new Action(() =>
+            {
+                result.Add(item);
+            }), DispatcherPriority.ContextIdle);
+        }
+
+        return result;
+    }
+
+    public static void ReloadAsyncIdle<T>(this ObservableCollection<T> source, Action<int, int> onProgress, Action onComplete = null)
+    {
+        var copy = source.ToList();
+        source.Clear();
+
+        int count = copy.Count;
+        int completed = 0;
+
+        foreach (var item in copy)
+        {
+            Application.Current.Dispatcher.BeginInvoke(new Action(() =>
+            {
+                source.Add(item);
+                completed++;
+
+                onProgress?.Invoke(completed, count);
+
+                if (completed == count)
+                {
+                    onComplete?.Invoke();
+                }
+            }), DispatcherPriority.ContextIdle);
+        }
+    }
+}
+