Added cap search in wpf sample.

Tests/Tester.WPF/MainWindow.xaml

@@ -6,6 +6,7 @@
         Style="{StaticResource AppWindow}">
     <Grid>
         <Grid.RowDefinitions>
+            <RowDefinition Height="auto" />
             <RowDefinition Height="auto" />
             <RowDefinition Height="*" />
         </Grid.RowDefinitions>
@@ -17,7 +18,7 @@
         </Grid.ColumnDefinitions>
 
         <Label Content="Sources"></Label>
-        <ListBox x:Name="SrcList" Grid.Row="1" Width="150"
+        <ListBox x:Name="SrcList" Grid.Row="1" Grid.RowSpan="2" Width="150"
                  SelectionChanged="SrcList_SelectionChanged"
                  Style="{StaticResource AppListBox}">
             <ListBox.ItemTemplate>
@@ -34,7 +35,12 @@
         </ListBox>
 
         <Label Content="Caps" Grid.Column="1"></Label>
-        <ListBox x:Name="CapList" Grid.Row="1" Grid.Column="1" Width="150"
+        <TextBox Text="{Binding CapFilter, UpdateSourceTrigger=PropertyChanged}" DataContext="{Binding ElementName=SrcList, Path=SelectedItem}"
+                 Grid.Column="1" Grid.Row="1"
+                 modern:TextBoxUI.WatermarkText="Find cap name"></TextBox>
+        <ListBox x:Name="CapList" Grid.Row="2" Grid.Column="1" Width="150"
+                 DataContext="{Binding ElementName=SrcList, Path=SelectedItem}"
+                 ItemsSource="{Binding Caps}"
                  SelectionChanged="CapList_SelectionChanged"
                  Style="{StaticResource AppListBox}">
             <ListBox.ItemTemplate>
@@ -48,7 +54,7 @@
             </ListBox.ItemTemplate></ListBox>
 
         <Label Content="Cap values" Grid.Column="2"></Label>
-        <ListBox x:Name="CapDetailList" Grid.Row="1" Grid.Column="2" MinWidth="100"
+        <ListBox x:Name="CapDetailList" Grid.Row="1" Grid.RowSpan="2" Grid.Column="2" MinWidth="100"
                  SelectionChanged="CapDetailList_SelectionChanged"
                  ScrollViewer.CanContentScroll="True" 
                  Style="{StaticResource AppListBox}">
@@ -64,7 +70,7 @@
             <TextBlock Text="{Binding State}"></TextBlock>
             <Button Content="Test acquire" Click="Button_Click_1" Margin="4 0"></Button>
         </StackPanel>
-        <modern:AnimatedScrollViewer Grid.Row="1" Grid.Column="3" VerticalScrollBarVisibility="Auto"
+        <modern:AnimatedScrollViewer Grid.Row="1" Grid.RowSpan="2" Grid.Column="3" VerticalScrollBarVisibility="Auto"
 				HorizontalScrollBarVisibility="Auto">
             <Image Stretch="Uniform" MaxWidth="1000"
                    RenderOptions.BitmapScalingMode="HighQuality"

Tests/Tester.WPF/MainWindow.xaml.cs

@@ -99,17 +99,7 @@ namespace Tester.WPF
             var dsId = SrcList.SelectedItem as DSVM;
             if (dsId != null)
             {
-                var rc = dsId.DS.Open();
+                dsId.Open();
-                //rc = DGControl.Status.Get(dsId, ref stat);
-                if (rc == ReturnCode.Success)
-                {
-                    var caps = dsId.DS.SupportedCaps.Select(o => new CapVM(dsId, o)).OrderBy(o => o.Name).ToList();
-                    CapList.ItemsSource = caps;
-                }
-            }
-            else
-            {
-                CapList.ItemsSource = null;
             }
         }
 

Tests/Tester.WPF/ViewModels/CapVM.cs

@@ -17,17 +17,17 @@ namespace Tester.WPF
         MethodInfo _getCurrentMethod;
         MethodInfo _setMethod;
 
-        public CapVM(DSVM ds, CapabilityId cap)
+        public CapVM(DataSource ds, CapabilityId cap)
         {
-            _ds = ds.DS;
+            _ds = ds;
             Cap = cap;
-            Supports = ds.DS.CapQuerySupport(cap);
+            Supports = ds.CapQuerySupport(cap);
 
             var capName = cap.ToString();
-            var wrapProperty = ds.DS.GetType().GetProperty(capName);
+            var wrapProperty = ds.GetType().GetProperty(capName);
             if (wrapProperty != null)
             {
-                _wrapper = wrapProperty.GetGetMethod().Invoke(ds.DS, null);
+                _wrapper = wrapProperty.GetGetMethod().Invoke(ds, null);
                 var wrapperType = _wrapper.GetType();
                 _getMethod = wrapperType.GetMethod("Get");
                 _getCurrentMethod = wrapperType.GetMethod("GetCurrent");

Tests/Tester.WPF/ViewModels/DSVM.cs

@@ -1,17 +1,73 @@
-using NTwain;
+using GalaSoft.MvvmLight;
+using NTwain;
 using NTwain.Data;
+using System.Collections.Generic;
+using System.Collections.ObjectModel;
+using System.ComponentModel;
+using System.Linq;
+using System.Windows.Data;
 
 namespace Tester.WPF
 {
     /// <summary>
     /// Wraps a data source as view model.
     /// </summary>
-    class DSVM
+    class DSVM : ViewModelBase
     {
         public DataSource DS { get; set; }
 
         public string Name { get { return DS.Name; } }
         public string Version { get { return DS.Version.Info; } }
         public string Protocol { get { return DS.ProtocolVersion.ToString(); } }
+
+        ICollectionView _capView;
+        public DSVM()
+        {
+            Caps = new ObservableCollection<CapVM>();
+            _capView = CollectionViewSource.GetDefaultView(Caps);
+            _capView.SortDescriptions.Add(new System.ComponentModel.SortDescription("Name", System.ComponentModel.ListSortDirection.Ascending));
+            _capView.Filter = FilterCapRoutine;
+        }
+
+        private bool FilterCapRoutine(object obj)
+        {
+            if (!string.IsNullOrWhiteSpace(CapFilter))
+            {
+                var vm = obj as CapVM;
+                if (vm != null)
+                {
+                    return vm.Name.IndexOf(CapFilter, System.StringComparison.OrdinalIgnoreCase) > -1;
+                }
+            }
+            return true;
+        }
+
+        public void Open()
+        {
+            Caps.Clear();
+            var rc = DS.Open();
+            //rc = DGControl.Status.Get(dsId, ref stat);
+            if (rc == ReturnCode.Success)
+            {
+                foreach (var c in DS.SupportedCaps.Select(o => new CapVM(DS, o)))
+                {
+                    Caps.Add(c);
+                }
+            }
+        }
+
+        private string _capFilter;
+
+        public string CapFilter
+        {
+            get { return _capFilter; }
+            set
+            {
+                _capFilter = value;
+                _capView.Refresh();
+            }
+        }
+
+        public ObservableCollection<CapVM> Caps { get; private set; }
     }
 }