StartPage: Move check if solution files still exist onto a background thread (solutions might be stored on slow network drive)

git-svn-id: svn://svn.sharpdevelop.net/sharpdevelop/trunk@5815 1ccf3a8d-04fe-1044-b7c0-cef0b8235c61

src/AddIns/Misc/StartPage/Project/Src/RecentProjectsControl.xaml

@@ -8,6 +8,7 @@
 			SelectionMode="Single"
 			core:SortableGridViewColumn.SortMode="Automatic"
 			Margin="0,0,0,20"
+			Visibility="Collapsed"
 			MouseDoubleClick="lastProjectsDoubleClick"
 			KeyDown="lastProjectsKeyDown">
 			<ListView.Resources>

src/AddIns/Misc/StartPage/Project/Src/RecentProjectsControl.xaml.cs

@@ -7,14 +7,18 @@
 
 using System;
 using System.Collections.Generic;
+using System.Collections.ObjectModel;
+using System.ComponentModel;
 using System.IO;
+using System.Linq;
+using System.Threading;
 using System.Windows;
 using System.Windows.Controls;
 using System.Windows.Documents;
 using System.Windows.Input;
-
 using ICSharpCode.Core.Presentation;
 using ICSharpCode.SharpDevelop;
+using ICSharpCode.SharpDevelop.Gui;
 using ICSharpCode.SharpDevelop.Project;
 
 namespace ICSharpCode.StartPage
@@ -39,29 +43,45 @@ namespace ICSharpCode.StartPage
 			set { SetValue(HeaderProperty, value); }
 		}
 		
+		
 		void BuildRecentProjectList()
+		{
+			// When building the project list we access the .sln files (to see if they still exist).
+			// Because those might be stored on a slow network drive, we do this on a background thread so that
+			// SharpDevelop startup doesn't have to wait.
+			ThreadPool.QueueUserWorkItem(AsyncBuildRecentProjectList, FileService.RecentOpen.RecentProject.ToArray());
+		}
+		
+		void AsyncBuildRecentProjectList(object state)
 		{
 			List<RecentOpenItem> items = new List<RecentOpenItem>();
-			foreach (string path in FileService.RecentOpen.RecentProject) {
+			foreach (string path in (string[])state) {
 				FileInfo file = new FileInfo(path);
 				if (file.Exists) {
 					items.Add(
 						new RecentOpenItem {
-							Name = System.IO.Path.GetFileNameWithoutExtension(path),
+							Name = Path.GetFileNameWithoutExtension(path),
 							LastModification = file.LastWriteTime.ToShortDateString(),
 							Path = path
 						});
 				}
 			}
+			if (items.Count > 0) {
+				WorkbenchSingleton.SafeThreadAsyncCall(new Action(
+					delegate {
 						lastProjectsListView.ItemsSource = items;
-			lastProjectsListView.Visibility = items.Count > 0 ? Visibility.Visible : Visibility.Collapsed;
+						lastProjectsListView.Visibility = Visibility.Visible;
+					}));
+			}
 		}
 		
-		class RecentOpenItem
+		class RecentOpenItem : INotifyPropertyChanged
 		{
 			public string Name { get; set; }
 			public string LastModification { get; set; }
 			public string Path { get; set; }
+			
+			event PropertyChangedEventHandler INotifyPropertyChanged.PropertyChanged { add { } remove { } }
 		}
 		
 		void lastProjectsDoubleClick(object sender, RoutedEventArgs e)