====== Source Code WpfDesktopEditionSample S57Viewer.zip ======

====MainWindow.xaml.cs====

<code csharp>   
  
 using System.Globalization;  
 using System.Windows;  
 using ThinkGeo.MapSuite.Core;  
 using ThinkGeo.MapSuite.WpfDesktopEdition;  
  
 namespace S57Viewer  
 {  
     /// <summary>  
     /// Interaction logic for MainWindow.xaml  
     /// </summary>  
     public partial class MainWindow : Window  
     {  
         private MainViewModel mainViewModel;  
  
         /// <summary>  
         /// Initializes a new instance of the MainWindow class.  
         /// </summary>  
         public MainWindow()  
         {  
             InitializeComponent();  
             Closing += (s, e) => mainViewModel.Cleanup();  
         }  
  
         private void WpfMap_CurrentScaleChanging(object sender, CurrentScaleChangingWpfMapEventArgs e)  
         {  
             CurrentScale.Text = string.Format("1:{0:N}", e.CurrentScale);  
         }  
  
         private void WpfMap_MouseMove(object sender, System.Windows.Input.MouseEventArgs e)  
         {  
             Point currentPoint = e.GetPosition(WpfMap);  
             PointShape worldPoint = ExtentHelper.ToWorldCoordinate(WpfMap.CurrentExtent, new ScreenPointF((float)currentPoint.X, (float)currentPoint.Y), (float)WpfMap.ActualWidth, (float)WpfMap.ActualHeight);  
  
             CurrentX.Text = worldPoint.X.ToString("f6", CultureInfo.InvariantCulture);  
             CurrentY.Text = worldPoint.Y.ToString("f6", CultureInfo.InvariantCulture);  
         }  
  
         private void Window_Loaded(object sender, RoutedEventArgs e)  
         {  
             mainViewModel = new MainViewModel(new MenuItemService(), WpfMap);  
             DataContext = mainViewModel;  
         }  
     }  
 }  
  
 </code>


====MainViewModel.cs====

<code csharp>   
  
 using System;  
 using System.Collections.Generic;  
 using System.Collections.ObjectModel;  
 using System.ComponentModel;  
 using System.ComponentModel.Composition;  
 using System.ComponentModel.Composition.Hosting;  
 using System.IO;  
 using System.Linq;  
 using System.Reflection;  
 using System.Windows;  
 using System.Windows.Input;  
 using GalaSoft.MvvmLight;  
 using GalaSoft.MvvmLight.Command;  
 using GalaSoft.MvvmLight.Messaging;  
 using ThinkGeo.MapSuite.Core;  
 using ThinkGeo.MapSuite.WpfDesktopEdition;  
  
 namespace S57Viewer  
 {  
     public class MainViewModel : ViewModelBase  
     {  
         private const string boundingBoxPreviewOverlayName = "BoundingBoxPreview";  
         private const string chartsOverlayName = "ChartsOverlay";  
         private const string GraticuleOverlayName = "GraticuleOverlay";  
         private const string highlightOverlayName = "highlight";  
         private const string WorldMapOverlayName = "WorldMapOverlay";  
         private readonly IMenuItemService dataService;  
         private Collection<BaseMenuItem> areaDrawingModes;  
         private Collection<BaseMenuItem> baseMaps;  
         private InMemoryFeatureLayer boundingBoxPreviewLayer;  
         private bool canHandleExecute = true;  
         private ChartSelectedItem chartSelectedItem = new ChartSelectedItem(string.Empty, null);  
         private ICommand clearSelectionCommand;  
         private Collection<BaseMenuItem> colorSchemas;  
         private Collection<BaseMenuItem> displayCategorys;  
         private bool isIdentify = false;  
         private bool isOnLoading;  
         private WpfMap map;  
         private Collection<object> menuItems;  
  
         [ImportMany(typeof(MenuItemMessageHandler),|AllowRecomposition = false)]  
         private Collection<MenuItemMessageHandler> messageHandlers;  
  
         private ICommand opacityPanelCloseCommand;  
         private double overlayOpacity = 1;  
         private Collection<BaseMenuItem> pointDrawingModes;  
         private BaseMenuItem selectedAreaDrawingMode;  
         private BaseMenuItem selectedBaseMap;  
         private BaseMenuItem selectedColorSchema;  
         private BaseMenuItem selectedDisplayCategory;  
         private FeatureInfo selectedFeatureInfo;  
         private BaseMenuItem selectedPointDrawingMode;  
         private BaseMenuItem selectedSymbolLabel;  
         private BaseMenuItem showContourText;  
         private BaseMenuItem showingGradicule;  
         private BaseMenuItem showLightDescriptions;  
         private BaseMenuItem showLights;  
         private bool showOpacityPanel;  
         private BaseMenuItem showSoundingText;  
         private Collection<BaseMenuItem> symbolLabels;  
         private ICommand toolBarCommand;  
  
         public MainViewModel(IMenuItemService dataService, WpfMap map)  
         {  
             LoadMessageHandlers();  
  
             this.dataService = dataService;  
             this.dataService.GetData(  
                 (item, error) =>  
                 {  
                     if (error != null)  
                     {  
                         menuItems = new Collection<object>(null);  
                         return;  
                     }  
                     menuItems = new Collection<object>(item);  
                 });  
  
             this.map = map;  
             map.MapClick += WpfMap_MapClick;  
             SetToolbarMenuItems();  
             Messenger.Default.Register<ChartMessage>(this, (m) => ChartSelectedItem = new ChartSelectedItem(string.Empty, null));  
             Messenger.Default.Register<MenuItemMessage>(this, "ShowOpacityPanel", (m) => ShowOpacityPanel = true);  
  
             Messenger.Default.Register<MenuItemMessage>(this, HandleMenuItemMessage);  
             Messenger.Default.Register<ToolBarMessage>(this, HandleToolBarMessage);  
             Messenger.Default.Register<ChartMessage>(this, "LoadCharts", HandleLoadChartMessage);  
             Messenger.Default.Register<ChartMessage>(this, "UnloadCharts", HandleUnloadChartMessage);  
             Messenger.Default.Register<ChartSelectedItemMessage>(this, HandleChartSelectedItemMessage);  
             Messenger.Default.Register<SafeWaterDepthSettingMessage>(this, HandleSafeWaterDepthMessage);  
  
             map.CurrentExtent = new RectangleShape(-130, 40, -30, 5);  
             map.Overlays.Add(WorldMapOverlayName, new WorldMapKitWmsWpfOverlay());  
  
             InitBoundingBoxPreviewOverlay(map);  
         }  
  
         public Collection<BaseMenuItem> AreaDrawingModes  
         {  
             get { return areaDrawingModes; }  
         }  
  
         public Collection<BaseMenuItem> BaseMaps  
         {  
             get { return baseMaps; }  
         }  
  
         public ChartSelectedItem ChartSelectedItem  
         {  
             get { return chartSelectedItem; }  
             set  
             {  
                 if (chartSelectedItem != value)  
                 {  
                     chartSelectedItem = value;  
                     RaisePropertyChanged(() => ChartSelectedItem);  
                 }  
             }  
         }  
  
         public ICommand ClearSelectionCommand  
         {  
             get { return clearSelectionCommand ?? (clearSelectionCommand = new RelayCommand(HandleClearSelectionCommand)); }  
         }  
  
         public Collection<BaseMenuItem> ColorSchemas  
         {  
             get { return colorSchemas; }  
         }  
  
         public Collection<BaseMenuItem> DisplayCategorys  
         {  
             get { return displayCategorys; }  
         }  
  
         public bool IsIdentify  
         {  
             get { return isIdentify; }  
             set  
             {  
                 map.Cursor = (value ? Cursors.Cross : null);  
                 isIdentify = value;  
             }  
         }  
  
         public bool IsOnLoading  
         {  
             get { return isOnLoading; }  
             set  
             {  
                 isOnLoading = value;  
                 RaisePropertyChanged(() => IsOnLoading);  
             }  
         }  
  
         public Collection<object> MenuItems  
         {  
             get { return menuItems; }  
         }  
  
         public ICommand OpacityPanelCloseCommand  
         {  
             get { return opacityPanelCloseCommand ?? (opacityPanelCloseCommand = new RelayCommand(() => ShowOpacityPanel = false)); }  
         }  
  
         public double OverlayOpacity  
         {  
             get { return overlayOpacity; }  
             set  
             {  
                 if (Math.Abs(overlayOpacity - value) > double.Epsilon)  
                 {  
                     overlayOpacity = value;  
                     ApplyOverlayOpacity();  
                     RaisePropertyChanged(() => OverlayOpacity);  
                 }  
             }  
         }  
  
         public Collection<BaseMenuItem> PointDrawingModes  
         {  
             get { return pointDrawingModes; }  
         }  
  
         public BaseMenuItem SelectedAreaDrawingMode  
         {  
             get { return selectedAreaDrawingMode; }  
             set  
             {  
                 if (selectedAreaDrawingMode != value)  
                 {  
                     selectedAreaDrawingMode = value;  
                     if (canHandleExecute)  
                     {  
                         value.SelectedCommand.Execute(null);  
                     }  
                     RaisePropertyChanged(() => SelectedAreaDrawingMode);  
                 }  
             }  
         }  
  
         public BaseMenuItem SelectedBaseMap  
         {  
             get { return selectedBaseMap; }  
             set  
             {  
                 selectedBaseMap = value;  
                 if (canHandleExecute)  
                 {  
                     value.SelectedCommand.Execute(null);  
                 }  
                 RaisePropertyChanged(() => SelectedBaseMap);  
             }  
         }  
  
         public BaseMenuItem SelectedColorSchema  
         {  
             get { return selectedColorSchema; }  
             set  
             {  
                 if (selectedColorSchema != value)  
                 {  
                     selectedColorSchema = value;  
                     if (canHandleExecute)  
                     {  
                         value.SelectedCommand.Execute(null);  
                     }  
                     RaisePropertyChanged(() => SelectedColorSchema);  
                 }  
             }  
         }  
  
         public BaseMenuItem SelectedDisplayCategory  
         {  
             get { return selectedDisplayCategory; }  
             set  
             {  
                 if (selectedDisplayCategory != value)  
                 {  
                     selectedDisplayCategory = value;  
                     if (canHandleExecute)  
                     {  
                         value.SelectedCommand.Execute(null);  
                     }  
                     RaisePropertyChanged(() => SelectedDisplayCategory);  
                 }  
             }  
         }  
  
         public FeatureInfo SelectedFeatureInfo  
         {  
             get { return selectedFeatureInfo; }  
             set  
             {  
                 if (selectedFeatureInfo != value)  
                 {  
                     selectedFeatureInfo = value;  
                     HandleFeatureSelectedChanged(value);  
                     RaisePropertyChanged(() => SelectedFeatureInfo);  
                 }  
             }  
         }  
  
         public BaseMenuItem SelectedPointDrawingMode  
         {  
             get { return selectedPointDrawingMode; }  
             set  
             {  
                 if (selectedPointDrawingMode != value)  
                 {  
                     selectedPointDrawingMode = value;  
                     if (canHandleExecute)  
                     {  
                         value.SelectedCommand.Execute(null);  
                     }  
                     RaisePropertyChanged(() => SelectedPointDrawingMode);  
                 }  
             }  
         }  
  
         public BaseMenuItem SelectedSymbolLabel  
         {  
             get { return selectedSymbolLabel; }  
             set  
             {  
                 if (selectedSymbolLabel != value)  
                 {  
                     selectedSymbolLabel = value;  
                     if (canHandleExecute)  
                     {  
                         value.SelectedCommand.Execute(null);  
                     }  
                     RaisePropertyChanged(() => SelectedSymbolLabel);  
                 }  
             }  
         }  
  
         public BaseMenuItem ShowContourText  
         {  
             get { return showContourText; }  
             set { showContourText = value; }  
         }  
  
         public BaseMenuItem ShowingGradicule  
         {  
             get { return showingGradicule; }  
             set  
             {  
                 if (showingGradicule != value)  
                 {  
                     showingGradicule = value;  
                     RaisePropertyChanged(() => ShowingGradicule);  
                 }  
             }  
         }  
  
         public BaseMenuItem ShowLightDescriptions  
         {  
             get { return showLightDescriptions; }  
             set { showLightDescriptions = value; }  
         }  
  
         public BaseMenuItem ShowLights  
         {  
             get { return showLights; }  
             set { showLights = value; }  
         }  
  
         public bool ShowOpacityPanel  
         {  
             get { return showOpacityPanel; }  
             set  
             {  
                 if (showOpacityPanel != value)  
                 {  
                     showOpacityPanel = value;  
                     RaisePropertyChanged(() => ShowOpacityPanel);  
                 }  
             }  
         }  
  
         public BaseMenuItem ShowSoundingText  
         {  
             get { return showSoundingText; }  
             set { showSoundingText = value; }  
         }  
  
         public Collection<BaseMenuItem> SymbolLabels  
         {  
             get { return symbolLabels; }  
         }  
  
         public ICommand ToolBarCommand  
         {  
             get { return toolBarCommand ?? (toolBarCommand = new RelayCommand<string>(HandleToolBarCommand)); }  
         }  
  
         public override void Cleanup()  
         {  
             map.MapClick -= WpfMap_MapClick;  
             Messenger.Default.Unregister(this);  
             base.Cleanup();  
         }  
  
         internal void ApplyOverlayOpacity()  
         {  
             if (map.Overlays.Contains(chartsOverlayName))  
             {  
                 LayerOverlay overlay = ((LayerOverlay)map.Overlays[chartsOverlayName]);  
                 overlay.OverlayCanvas.Opacity = OverlayOpacity;  
                 map.Refresh(overlay);  
             }  
         }  
  
         private static BaseMenuItem GetMenuByAction(string action, Collection<object> sourceMenus)  
         {  
             if (sourceMenus != null)  
             {  
                 foreach (object item in sourceMenus)  
                 {  
                     if (item is CompositeMenuItem)  
                     {  
                         CompositeMenuItem compositeMenuItem = ((CompositeMenuItem)item);  
                         BaseMenuItem menu = GetMenuByAction(action, compositeMenuItem.Children);  
                         if (menu != null)  
                         {  
                             return menu;  
                         }  
                     }  
                     else if (item is SingleMenuItem)  
                     {  
                         SingleMenuItem singleMenuItem = ((SingleMenuItem)item);  
                         if (string.Compare(singleMenuItem.Action, action, StringComparison.InvariantCultureIgnoreCase) == 0)  
                         {  
                             return singleMenuItem;  
                         }  
                     }  
                 }  
             }  
             return null;  
         }  
  
         private static Collection<BaseMenuItem> GetMenusByGroupName(string groupName, Collection<object> sourceMenus)  
         {  
             var menus = new Collection<BaseMenuItem>();  
             if (sourceMenus != null)  
             {  
                 foreach (object item in sourceMenus)  
                 {  
                     if (item is CompositeMenuItem)  
                     {  
                         CompositeMenuItem compositeMenuItem = ((CompositeMenuItem)item);  
                         Collection<BaseMenuItem> recursions = GetMenusByGroupName(groupName, compositeMenuItem.Children);  
                         foreach (BaseMenuItem recursionItem in recursions)  
                         {  
                             menus.Add(recursionItem);  
                         }  
                     }  
                     else if (item is SingleMenuItem)  
                     {  
                         SingleMenuItem singleMenuItem = ((SingleMenuItem)item);  
                         if (string.Compare(singleMenuItem.GroupName, groupName, StringComparison.InvariantCultureIgnoreCase) == 0)  
                         {  
                             menus.Add((BaseMenuItem)item);  
                         }  
                     }  
                 }  
             }  
             return menus;  
         }  
  
         private LayerOverlay CreateHighlightLayerOverlay(Feature feature)  
         {  
             LayerOverlay highlightOverlay = new LayerOverlay();  
             InMemoryFeatureLayer inMemoryFeatureLayer = new InMemoryFeatureLayer();  
             //GeoHatchBrush fillBrush = new GeoHatchBrush(GeoHatchStyle.Cross, GeoColor.FromArgb(100, 0, 255, 0));  
             inMemoryFeatureLayer.ZoomLevelSet.ZoomLevel01.DefaultAreaStyle = AreaStyles.CreateHatchStyle(GeoHatchStyle.BackwardDiagonal, GeoColor.FromArgb(150, 254, 255, 39), GeoColor.StandardColors.Transparent);  
             inMemoryFeatureLayer.ZoomLevelSet.ZoomLevel01.DefaultLineStyle = LineStyles.CreateSimpleLineStyle(GeoColor.FromArgb(50, GeoColor.StandardColors.Green), 3, false);  
             inMemoryFeatureLayer.ZoomLevelSet.ZoomLevel01.ApplyUntilZoomLevel = ApplyUntilZoomLevel.Level20;  
             inMemoryFeatureLayer.InternalFeatures.Add(feature);  
  
             highlightOverlay.Layers.Add(inMemoryFeatureLayer);  
             return highlightOverlay;  
         }  
  
         private void HandleChartSelectedItemMessage(ChartSelectedItemMessage message)  
         {  
             throw new System.NotImplementedException();  
         }  
  
         private void HandleClearSelectionCommand()  
         {  
             ChartSelectedItem = new ChartSelectedItem(chartSelectedItem.FullName, new List<FeatureInfo>());  
         }  
  
         private void HandleFeatureSelectedChanged(object item)  
         {  
             FeatureInfo featureInfo = item as FeatureInfo;  
  
             if (!map.Overlays.Contains(chartsOverlayName))  
             {  
                 return;  
             }  
             if (map.Overlays.Contains(highlightOverlayName))  
             {  
                 map.Overlays.Remove(highlightOverlayName);  
             }  
  
             if (featureInfo != null)  
             {  
                 LayerOverlay overlay = map.Overlays[chartsOverlayName] as LayerOverlay;  
                 HydrographyFeatureLayer layer = overlay.Layers[featureInfo.LayerName] as HydrographyFeatureLayer;  
                 layer.Open();  
                 Feature feature = layer.QueryTools.GetFeatureById(featureInfo.Id, ReturningColumnsType.AllColumns);  
                 layer.Close();  
  
                 if (feature != null)  
                 {  
                     LayerOverlay highlightOverlay = CreateHighlightLayerOverlay(feature);  
                     map.Overlays.Add(highlightOverlayName, highlightOverlay);  
                     map.CurrentExtent = feature.GetBoundingBox();  
                 }  
             }  
  
             map.Refresh();  
         }  
  
         private void HandleLoadChartMessage(ChartMessage message)  
         {  
             LayerOverlay overlay = null;  
             if (message.Charts != null)  
             {  
                 if (map.Overlays.Contains(chartsOverlayName))  
                 {  
                     overlay = ((LayerOverlay)map.Overlays[chartsOverlayName]);  
                 }  
                 else  
                 {  
                     overlay = new LayerOverlay()  
                     {  
                         TileType = TileType.SingleTile,  
                     };  
                     map.Overlays.Insert(1, chartsOverlayName, overlay);  
                 }  
  
                 overlay.Layers.Clear();  
                 IEnumerable<ChartItem> charts = message.Charts;  
                 RectangleShape boundingBox = null;  
                 foreach (ChartItem item in charts)  
                 {  
                     if (!File.Exists(item.IndexFileName))  
                     {  
                         HydrographyFeatureSource.BuildIndexFile(item.FileName, BuildIndexMode.DoNotRebuild);  
                     }  
                     HydrographyFeatureLayer layer = new HydrographyFeatureLayer(item.FileName);  
  
                     layer.DrawingFeatures += hydrographyLayer_DrawingFeatures;  
  
                     layer.IsDepthContourTextVisible = Globals.IsDepthContourTextVisible;  
                     layer.IsLightDescriptionVisible = Globals.IsLightDescriptionVisible;  
                     layer.IsSoundingTextVisible = Globals.IsSoundingTextVisible;  
                     layer.SymbolTextDisplayMode = Globals.SymbolTextDisplayMode;  
                     layer.DisplayCategory = Globals.DisplayMode;  
                     layer.DefaultColorSchema = Globals.CurrentColorSchema;  
                     layer.SymbolDisplayMode = Globals.CurrentSymbolDisplayMode;  
                     layer.BoundaryDisplayMode = Globals.CurrentBoundaryDisplayMode;  
  
                     layer.SafetyDepthInMeter = HydrographyFeatureLayer.ConvertDistanceToMeters(Globals.SafetyDepth, Globals.CurrentDepthUnit);  
                     layer.ShallowDepthInMeter = HydrographyFeatureLayer.ConvertDistanceToMeters(Globals.ShallowDepth, Globals.CurrentDepthUnit);  
                     layer.DeepDepthInMeter = HydrographyFeatureLayer.ConvertDistanceToMeters(Globals.DeepDepth, Globals.CurrentDepthUnit);  
                     layer.SafetyContourDepthInMeter = HydrographyFeatureLayer.ConvertDistanceToMeters(Globals.SafetyContour, Globals.CurrentDepthUnit);  
  
                     layer.DrawingMode = Globals.CurrentDrawingMode;  
                     layer.IsFullLightLineVisible = Globals.IsFullLightLineVisible;  
                     layer.Name = item.FileName;  
                     layer.Open();  
                     if (boundingBox == null)  
                     {  
                         boundingBox = layer.GetBoundingBox();  
                     }  
                     else  
                     {  
                         boundingBox.ExpandToInclude(layer.GetBoundingBox());  
                     }  
  
                     boundingBoxPreviewLayer.InternalFeatures.Add(layer.GetHashCode().ToString(), new Feature(layer.GetBoundingBox()));  
  
                     layer.Close();  
                     overlay.Layers.Add(item.FileName, layer);  
                 }  
                 if (boundingBox != null)  
                 {  
                     map.CurrentExtent = boundingBox;  
                 }  
  
                 //SetupAnimationForOverlay(overlay);  
  
                 ApplyOverlayOpacity();  
  
                 map.Refresh();  
             }  
         }  
  
         private void HandleMenuItemMessage(MenuItemMessage message)  
         {  
             if (message != null && message.MenuItem != null && !string.IsNullOrEmpty(message.MenuItem.Action))  
             {  
                 foreach (var messageHandler in messageHandlers)  
                 {  
                     if (messageHandler.Actions.Contains(message.MenuItem.Action))  
                     {  
                         messageHandler.Handle(Application.Current.MainWindow, map, message);  
                     }  
                 }  
             }  
         }  
  
         private void HandleSafeWaterDepthMessage(SafeWaterDepthSettingMessage message)  
         {  
             if (!map.Overlays.Contains(chartsOverlayName))  
             {  
                 return;  
             }  
  
             LayerOverlay overlay = map.Overlays[chartsOverlayName] as LayerOverlay;  
             var layers = overlay.Layers.OfType<HydrographyFeatureLayer>();  
             foreach (HydrographyFeatureLayer layer in layers)  
             {  
                 layer.SafetyDepthInMeter = HydrographyFeatureLayer.ConvertDistanceToMeters(message.SafetyWaterDepth, message.DepthUnit);  
                 layer.ShallowDepthInMeter = HydrographyFeatureLayer.ConvertDistanceToMeters(message.ShallowWaterDepth, message.DepthUnit);  
                 layer.DeepDepthInMeter = HydrographyFeatureLayer.ConvertDistanceToMeters(message.DeepWaterDepth, message.DepthUnit);  
                 layer.SafetyContourDepthInMeter = HydrographyFeatureLayer.ConvertDistanceToMeters(message.SafetyContourDepth, message.DepthUnit);  
             }  
             Globals.SafetyDepth = message.SafetyWaterDepth;  
             Globals.DeepDepth = message.DeepWaterDepth;  
             Globals.ShallowDepth = message.ShallowWaterDepth;  
             Globals.SafetyContour = message.SafetyContourDepth;  
             Globals.CurrentDepthUnit = message.DepthUnit;  
             map.Refresh();  
         }  
  
         private void HandleToolBarCommand(string action)  
         {  
             var message = new ToolBarMessage(action);  
             Messenger.Default.Send<ToolBarMessage>(message);  
         }  
  
         private void HandleToolBarMessage(ToolBarMessage message)  
         {  
             if (message != null && !string.IsNullOrEmpty(message.Action))  
             {  
                 switch (message.Action.ToLower())  
                 {  
                     case "loadcharts":  
                         {  
                             var window = new ChartsManagmentWindow();  
                             window.Owner = Application.Current.MainWindow;  
                             window.ShowDialog();  
                         }  
                         break;  
                 }  
             }  
         }  
  
         private void HandleUnloadChartMessage(ChartMessage message)  
         {  
             if (message.Charts != null)  
             {  
                 if (map.Overlays.Contains(chartsOverlayName))  
                 {  
                     LayerOverlay overlay = ((LayerOverlay)map.Overlays[chartsOverlayName]);  
                     foreach (ChartItem item in message.Charts)  
                     {  
                         for (int i = overlay.Layers.Count - 1; i >= 0; i--)  
                         {  
                             Layer layer = overlay.Layers[i];  
                             if (item.FileName == layer.Name)  
                             {  
                                 overlay.Layers.Remove(layer);  
  
                                 boundingBoxPreviewLayer.InternalFeatures.Remove(layer.GetHashCode().ToString());  
                                 break;  
                             }  
                         }  
                     }  
  
                     RectangleShape boundingBox = null;  
                     foreach (Layer layer in overlay.Layers)  
                     {  
                         layer.Open();  
                         if (boundingBox == null)  
                         {  
                             boundingBox = layer.GetBoundingBox();  
                         }  
                         else  
                         {  
                             boundingBox.ExpandToInclude(layer.GetBoundingBox());  
                         }  
                         layer.Close();  
                     }  
                     if (boundingBox != null)  
                     {  
                         map.CurrentExtent = boundingBox;  
                     }  
                     map.Refresh();  
                 }  
             }  
         }  
  
         private void hydrographyLayer_DrawingFeatures(object sender, DrawingFeaturesEventArgs e)  
         {  
             if (!IsHydrographyLayerVisiable())  
             {  
                 e.Cancel = true;  
             }  
         }  
  
         private void InitBoundingBoxPreviewOverlay(WpfMap map)  
         {  
             boundingBoxPreviewLayer = new InMemoryFeatureLayer();  
             boundingBoxPreviewLayer.ZoomLevelSet.ZoomLevel01.DefaultAreaStyle = AreaStyles.CreateSimpleAreaStyle(GeoColor.StandardColors.Transparent, GeoColor.StandardColors.Blue);  
             boundingBoxPreviewLayer.ZoomLevelSet.ZoomLevel01.ApplyUntilZoomLevel = ApplyUntilZoomLevel.Level20;  
  
             LayerOverlay boundingBoxPreviewOverlay = new LayerOverlay();  
             boundingBoxPreviewOverlay.Layers.Add(boundingBoxPreviewLayer);  
             map.Overlays.Add(boundingBoxPreviewOverlayName, boundingBoxPreviewOverlay);  
         }  
  
         private bool IsHydrographyLayerVisiable()  
         {  
             bool enable = false;  
  
             if (boundingBoxPreviewLayer != null)  
             {  
                 foreach (Feature f in boundingBoxPreviewLayer.InternalFeatures)  
                 {  
                     if (f.GetBoundingBox().Width / map.CurrentExtent.Width > 0.5)  
                     {  
                         enable = true;  
                         break;  
                     }  
                 }  
             }  
  
             return enable;  
         }  
  
         private void LoadMessageHandlers()  
         {  
             var catalog = new AssemblyCatalog(Assembly.GetExecutingAssembly());  
             var container = new CompositionContainer(catalog);  
             container.ComposeParts(this);  
         }  
  
         private void MenuItem_PropertyChanged(object sender, PropertyChangedEventArgs e)  
         {  
             if (string.Compare(e.PropertyName, "IsChecked", StringComparison.InvariantCultureIgnoreCase) == 0)  
             {  
                 BaseMenuItem menuItem = sender as BaseMenuItem;  
                 if (menuItem.IsChecked)  
                 {  
                     canHandleExecute = false;  
                     switch (menuItem.GroupName.ToLowerInvariant())  
                     {  
                         case "s52areadrawingmode":  
                             SelectedAreaDrawingMode = menuItem;  
                             break;  
  
                         case "colorschema":  
                             SelectedColorSchema = menuItem;  
                             break;  
  
                         case "s52pointdrawingmode":  
                             SelectedPointDrawingMode = menuItem;  
                             break;  
  
                         case "showworldmap":  
                             SelectedBaseMap = menuItem;  
                             break;  
  
                         case "displaycategory":  
                             SelectedDisplayCategory = menuItem;  
                             break;  
  
                         case "textlabel":  
                             SelectedSymbolLabel = menuItem;  
                             break;  
                     }  
                     canHandleExecute = true;  
                 }  
             }  
         }  
  
         //private void overlay_Drawing(object sender, DrawingOverlayEventArgs e)  
         //{  
         //    if (IsHydrographyLayerVisiable())  
         //    {  
         //        IsOnLoading = true;  
         //    }  
         //}  
  
         //private void overlay_Drawn(object sender, DrawnOverlayEventArgs e)  
         //{  
         //    IsOnLoading = false;  
         //}  
  
         private void SetToolbarMenuItems()  
         {  
             areaDrawingModes = GetMenusByGroupName("s52areadrawingmode", menuItems);  
             foreach (BaseMenuItem menuItem in areaDrawingModes)  
             {  
                 menuItem.PropertyChanged += MenuItem_PropertyChanged;  
             }  
             SelectedAreaDrawingMode = areaDrawingModes.FirstOrDefault(p => p.IsChecked);  
             colorSchemas = GetMenusByGroupName("colorschema", menuItems);  
             foreach (BaseMenuItem menuItem in colorSchemas)  
             {  
                 menuItem.PropertyChanged += MenuItem_PropertyChanged;  
             }  
             SelectedColorSchema = colorSchemas.FirstOrDefault(p => p.IsChecked);  
             pointDrawingModes = GetMenusByGroupName("s52pointdrawingmode", menuItems);  
             foreach (BaseMenuItem menuItem in pointDrawingModes)  
             {  
                 menuItem.PropertyChanged += MenuItem_PropertyChanged;  
             }  
             SelectedPointDrawingMode = pointDrawingModes.FirstOrDefault(p => p.IsChecked);  
  
             baseMaps = GetMenusByGroupName("showworldmap", menuItems);  
             foreach (BaseMenuItem menuItem in baseMaps)  
             {  
                 menuItem.PropertyChanged += MenuItem_PropertyChanged;  
             }  
             SelectedBaseMap = baseMaps.FirstOrDefault(m => m.IsChecked);  
  
             displayCategorys = GetMenusByGroupName("displaycategory", menuItems);  
             foreach (BaseMenuItem menuItem in displayCategorys)  
             {  
                 menuItem.PropertyChanged += MenuItem_PropertyChanged;  
             }  
             SelectedDisplayCategory = displayCategorys.FirstOrDefault(m => m.IsChecked);  
  
             symbolLabels = GetMenusByGroupName("textlabel", menuItems);  
             foreach (BaseMenuItem menuItem in symbolLabels)  
             {  
                 menuItem.PropertyChanged += MenuItem_PropertyChanged;  
             }  
             SelectedSymbolLabel = symbolLabels.FirstOrDefault(p => p.IsChecked);  
  
             showingGradicule = GetMenuByAction("graticule", menuItems);  
             showLights = GetMenuByAction("lights", menuItems);  
  
             showContourText = GetMenuByAction("contourlabel", menuItems);  
             showSoundingText = GetMenuByAction("soundinglabel", menuItems);  
             showLightDescriptions = GetMenuByAction("lightdescription", menuItems);  
         }  
  
         //private void SetupAnimationForOverlay(LayerOverlay overlay)  
         //{  
         //    overlay.Drawing -= overlay_Drawing;  
         //    overlay.Drawing += overlay_Drawing;  
         //    overlay.Drawn -= overlay_Drawn;  
         //    overlay.Drawn += overlay_Drawn;  
         //}  
  
         private void WpfMap_MapClick(object sender, MapClickWpfMapEventArgs e)  
         {  
             if (isIdentify)  
             {  
                 PointShape point = e.WorldLocation;  
                 if (!map.Overlays.Contains(chartsOverlayName))  
                 {  
                     return;  
                 }  
                 LayerOverlay overlay = map.Overlays[chartsOverlayName] as LayerOverlay;  
  
                 var features = new Collection<Feature>();  
                 HydrographyFeatureLayer hydrographyFeatureLayer = null;  
                 foreach (var item in overlay.Layers)  
                 {  
                     HydrographyFeatureLayer itemLayer = item as HydrographyFeatureLayer;  
                     itemLayer.Open();  
                     features = itemLayer.QueryTools.GetFeaturesIntersecting(point.GetBoundingBox(), ReturningColumnsType.AllColumns);  
  
                     if (features.Count > 0)  
                     {  
                         hydrographyFeatureLayer = itemLayer;  
                         break;  
                     }  
                 }  
  
                 if (features.Count > 0)  
                 {  
                     List<FeatureInfo> selectedFeatures = new List<FeatureInfo>();  
  
                     foreach (var item in features)  
                     {  
                         double area = double.MaxValue;  
                         PolygonShape areaShape = item.GetShape() as PolygonShape;  
                         if (areaShape != null)  
                         {  
                             area = areaShape.GetArea(map.MapUnit, AreaUnit.SquareMeters);  
                         }  
                         selectedFeatures.Add(new FeatureInfo(item, hydrographyFeatureLayer.Name, area));  
                     }  
  
                     if (map.Overlays.Contains(highlightOverlayName))  
                     {  
                         map.Overlays.Remove(highlightOverlayName);  
                     }  
  
                     IEnumerable<FeatureInfo> featureInfos = selectedFeatures.OrderBy(p => p.Area);  
                     SelectedFeatureInfo = featureInfos.FirstOrDefault();  
                     HydrographyFeatureSource featureSource = hydrographyFeatureLayer.FeatureSource as HydrographyFeatureSource;  
                     if (featureSource != null)  
                     {  
                         ChartSelectedItem = new ChartSelectedItem(featureSource.HydrographyFilePathname, featureInfos);  
                     }  
                 }  
                 else  
                 {  
                     if (map.Overlays.Contains(highlightOverlayName))  
                     {  
                         map.Overlays.Remove(highlightOverlayName);  
                     }  
                     map.Refresh();  
                 }  
             }  
         }  
     }  
 }  
  
 </code>