Make selection and most grid items to work. Grid splitter works also.

Known errors:
- OK button does nothing
- images and resources code is not working

src/Main/Base/Project/Src/Gui/Dialogs/NewFileTemplateItem.cs

@@ -11,5 +11,8 @@ namespace ICSharpCode.SharpDevelop.Gui
         }
 
         public FileTemplate Template { get; private set; }
+        public string DisplayName { get { return Template.DisplayName; } }
+        public string Description { get { return Template.Description; } }
+        public string Name { get { return Template.Name; } }
     }
 }

src/Main/Base/Project/Src/Gui/Dialogs/NewFileViewModel.cs

@@ -9,6 +9,7 @@
 using System;
 using System.Collections.Generic;
 using System.Collections.ObjectModel;
+using System.Runtime.CompilerServices;
 using ICSharpCode.Core;
 using ICSharpCode.SharpDevelop.Templates;
 using ICSharpCode.SharpDevelop.Widgets;
@@ -18,16 +19,71 @@ namespace ICSharpCode.SharpDevelop.Gui
 {
     public class NewFileViewModel : ViewModelBase
     {
+        #region Backing properties
+        private NewFileCategory _selectedCategory;
+        private string _searchFor;
+        private ObservableCollection<NewFileTemplateItem> _allTemplate;
+        private NewFileTemplateItem _selectedItem;
+
+        #endregion
+
         public NewFileViewModel()
         {
-            AllTemplate = new ObservableCollection<NewFileTemplateItem>();
-            Templates = new ObservableCollection<NewFileCategory>()
-            {
-                new NewFileCategory("Empty file")
-            };
+            _allTemplate = new ObservableCollection<NewFileTemplateItem>();
+           
             Icons = new Dictionary<IImage, int>();
             Categories = new ObservableCollection<NewFileCategory>();
+
+            AllFileTemplates = new NewFileCategory("All");
+            Categories.Add(AllFileTemplates);
+        }
+
+        public NewFileCategory AllFileTemplates { get; set; }
+
+        public NewFileCategory SelectedCategory
+        {
+            get { return _selectedCategory; }
+            set
+            {
+                _selectedCategory = value;
+                OnPropertyChanged();
+            }
+        }
+
+        
+        public ObservableCollection<NewFileTemplateItem> SelectedTemplates
+        {
+            get
+            {
+                UpdatedSelection();
+                return _allTemplate;
+            }
+        }
+
+        public void UpdatedSelection()
+        {
+            _allTemplate.Clear();
+            var selectedCategory = _selectedCategory;
+            if (selectedCategory != null)
+            {
+                foreach (var item in selectedCategory.Templates)
+                {
+                    _allTemplate.Add(item);
+                }
+            }
+        }
+
+        public NewFileTemplateItem SelectedItem
+        {
+            get { return _selectedItem; }
+            set
+            {
+                _selectedItem = value;
+                OnPropertyChanged();
+                OnPropertyChanged("Description");
             }
+        }
+
         public IProject Project
         {
             get;
@@ -48,11 +104,27 @@ namespace ICSharpCode.SharpDevelop.Gui
 
         public FileTemplateResult Result { get; set; }
 
-        public string SearchFor { get; set; }
-        public string Description { get; set; }
-        public ObservableCollection<NewFileTemplateItem> AllTemplate { get; set; }
+        public string SearchFor
+        {
+            get { return _searchFor; }
+            set { _searchFor = value; }
+        }
+
+        public string Description
+        {
+            get
+            {
+                return SelectedItem == null
+                    ? string.Empty
+                    : SelectedItem.Template.Description;
 
-		public Dictionary<IImage, int> Icons {
+            }
+            set { }
+        }
+
+
+        public Dictionary<IImage, int> Icons
+        {
             get;
             set;
         }

src/Main/Base/Project/Src/Gui/Dialogs/NewFileWindow.xaml

@@ -22,7 +22,7 @@
                 <ColumnDefinition Width="5" />
                 <ColumnDefinition Width="*" />
             </Grid.ColumnDefinitions  >
-            <Grid  VerticalAlignment="Stretch" HorizontalAlignment="Stretch">
+            <Grid >
                 <Grid.RowDefinitions>
                     <RowDefinition Height="Auto" />
                     <RowDefinition  />
@@ -30,7 +30,9 @@
                 <TextBlock Text="Categories" />
                 <TreeView Grid.Row="1" 
                           ItemsSource="{Binding Categories}"
-                          x:Name="categoryTreeView">
+                          x:Name="categoryTreeView"
+                          SelectedItemChanged="CategoryTreeView_SelectedItemChanged"
+                          >
 
                     <TreeView.ItemTemplate>
                         <HierarchicalDataTemplate ItemsSource="{Binding Children}">
@@ -40,8 +42,8 @@
 
                 </TreeView>
             </Grid> 
-            <GridSplitter Grid.Column="1" Width="5" />
-            <Grid Grid.Column="2" VerticalAlignment="Stretch" HorizontalAlignment="Stretch" >
+            <GridSplitter Grid.Column="1" ResizeDirection="Columns" Width="5" HorizontalAlignment="Center" VerticalAlignment="Stretch"/>
+            <Grid Grid.Column="2" >
                 <Grid.RowDefinitions>
                     <RowDefinition Height="Auto" />
                     <RowDefinition Height="*" />
@@ -50,10 +52,15 @@
                     <TextBlock Text="Search:" VerticalAlignment="Center" />
                     <TextBox Text="{Binding SearchFor}" Margin="2" Width="100"></TextBox>
                 </StackPanel>
-                <ListBox Grid.Row="1" ItemsSource="{Binding Templates}">
+                <ListBox Grid.Row="1" ItemsSource="{Binding SelectedTemplates}"
+            		SelectedItem="{Binding SelectedItem}"
+            	>
                     <ListBox.ItemTemplate>
                         <DataTemplate>
-                            <TextBlock Text="{Binding DisplayName}"></TextBlock>
+                            <StackPanel>
+                                <Label Content="{Binding DisplayName}" FontWeight="Bold" />
+                                <Label Content="{Binding Description}" />
+                            </StackPanel>
                         </DataTemplate>
                     </ListBox.ItemTemplate>
                 </ListBox>
@@ -61,7 +68,15 @@
         </Grid>
 
         <StackPanel Grid.Row="2">
-            <TextBlock Text="{Binding Description}" ></TextBlock>
+            <Label Content="{Binding Description}" />
+            <Grid>
+        		<Grid.ColumnDefinitions>
+        			<ColumnDefinition Width="Auto" />
+        			<ColumnDefinition />
+        		</Grid.ColumnDefinitions>
+        		<TextBlock Text="File name: " VerticalAlignment="Center" />
+	            <TextBox Grid.Column="1" Text="{Binding ItemFileName}" x:Name="fileNameTextBox" />
+	        </Grid>
         	<widgets:UniformGridWithSpacing Columns="2" HorizontalAlignment="Right" Margin="0,4,12,12">
                 <Button
 				Content="{core:Localize Global.OKButtonText}"

src/Main/Base/Project/Src/Gui/Dialogs/NewFileWindow.xaml.cs

@@ -41,6 +41,15 @@ namespace ICSharpCode.SharpDevelop.Gui
 			ViewModel.Project = project;
 			ViewModel.BasePath = basePath;
 			ViewModel.AllowUntitledFiles = basePath == null;
+			if(ViewModel.AllowUntitledFiles)
+			{
+				categoryTreeView.Focus();
+			}
+			else
+			{
+				fileNameTextBox.Focus();
+			}
+				
 		    InitializeTemplates(templateCategories, ViewModel.Categories);
 		}
 		
@@ -74,7 +83,8 @@ namespace ICSharpCode.SharpDevelop.Gui
                 {
                     ViewModel.Icons[titem.Template.Icon] = 0; // "create template icon"
                 }
-                ViewModel.AllTemplate.Add(titem);
+                ViewModel.AllFileTemplates.Templates.Add(titem);
+                ViewModel.SelectedTemplates.Add(titem);
                 node.Templates.Add(titem);
             }
             return node;
@@ -88,5 +98,10 @@ namespace ICSharpCode.SharpDevelop.Gui
 	    {
             Close();
 	    }
+		void CategoryTreeView_SelectedItemChanged(object sender, RoutedPropertyChangedEventArgs<object> e)
+		{
+			ViewModel.SelectedCategory = (NewFileCategory)categoryTreeView.SelectedItem;
+            ViewModel.UpdatedSelection();
+		}
 	}
 }