Add IsFileName property to indicate that the edited text is a file name.

source/InPlaceEditBoxDemo/MainWindow.xaml

@@ -127,7 +127,7 @@
                                              Text="{Binding Path=DisplayName, Mode=OneWay, UpdateSourceTrigger=PropertyChanged}"
                                              ToolTip="{Binding Description, Mode=OneWay, UpdateSourceTrigger=PropertyChanged}"
                                              Focusable="True"
-
+                                             IsFileName="{Binding IsFile}"
                                              VerticalAlignment="Stretch"
                                              HorizontalAlignment="Left"
                                              IsReadOnly="{Binding IsReadOnly}"

source/InplaceEditBoxLib/Views/EditBox.xaml.cs

@@ -88,6 +88,16 @@ public class EditBox : Control
                         typeof(EditBox),
                         new FrameworkPropertyMetadata(false));
 
+        /// <summary>
+        /// Dependency property for indicating if the edited data is a file name.
+        /// </summary>
+        private static readonly DependencyProperty IsFileNameProperty =
+                DependencyProperty.Register(
+                        "IsFileName",
+                        typeof(bool),
+                        typeof(EditBox),
+                        new FrameworkPropertyMetadata(false) );
+
         /// <summary>
         /// Send a Rename command request to the ViewModel if renaming has been executed
         /// 
@@ -325,6 +335,15 @@ public bool IsReadOnly
             set { SetValue(mIsReadOnlyProperty, value); }
         }
 
+        /// <summary>
+        /// Indicates if the edited data is a file name.
+        /// </summary>
+        public bool IsFileName
+        {
+            get { return (bool) GetValue(IsFileNameProperty); }
+            set { SetValue(IsFileNameProperty, value); }
+        }
+
         /// <summary>
         /// Gets the scrollviewer in which this control is embeded.
         /// </summary>
@@ -550,10 +569,7 @@ private void TextBlock_LeftMouseDown(object sender, MouseButtonEventArgs e)
             {
                 this.OnSwitchToEditingMode();
 
-                var t = _TextBox as TextBox;
-
-                if (t != null)
-                    t.SelectAll();
+                this.PrepareInitialEditSelection();
             }
 
             e.Handled = false;
@@ -571,11 +587,27 @@ private void ViewModel_RequestEdit(object sender, Events.RequestEdit e)
             {
                 this.OnSwitchToEditingMode();
 
-                var t = _TextBox as TextBox;
+                this.PrepareInitialEditSelection();
+            }
+        }
 
-                if (t != null)
-                    t.SelectAll();
+        private void PrepareInitialEditSelection()
+        {
+            if(_TextBox == null)
+            {
+                return;
             }
+            else if(IsFileName)
+            {
+                var fileExtensionIndex = _TextBox.Text.LastIndexOf('.');
+                if(fileExtensionIndex > 0)
+                {
+                    _TextBox.Select(0, fileExtensionIndex);
+                    return;
+                }
+            }
+
+            _TextBox.SelectAll();
         }
 
         #region ShowNotification

source/Solution/SolutionLib/Interfaces/IItem.cs

@@ -44,6 +44,11 @@ public interface IItem : IEditBox, IViewModelBase, IParent
         /// </summary>
         bool IsReadOnly { get; }
 
+        /// <summary>
+        /// Gets whether the item represents a file-like item.
+        /// </summary>
+        bool IsFile { get; }
+
         /// <summary>
         /// Gets/sets a string that determines the order in which items are displayed.
         /// </summary>

source/Solution/SolutionLib/ViewModels/Browser/Base/ItemViewModel.cs

@@ -159,6 +159,17 @@ private set
             }
         }
 
+        /// <summary>
+        /// Gets whether the item represents a file-like item.
+        /// </summary>
+        public bool IsFile
+        {
+            get
+            {
+                return this.ItemType == Models.SolutionItemType.File;
+            }
+        }
+
         /// <summary>
         /// Gets the parent object where this object is the child in the treeview.
         /// </summary>