private static void LoadFromLibrary()
        {
            if (GisEditor.LayerListManager.SelectedLayerListItem == null)
            {
                return;
            }
            StyleLibraryWindow library = new StyleLibraryWindow();

            if (library.ShowDialog().GetValueOrDefault())
            {
                FeatureLayer currentFeatureLayer = GisEditor.LayerListManager.SelectedLayerListItem.ConcreteObject as FeatureLayer;
                if (currentFeatureLayer != null)
                {
                    ZoomLevelHelper.ApplyStyle(library.Result.CompositeStyle, currentFeatureLayer, library.Result.FromZoomLevelIndex, library.Result.ToZoomLevelIndex);
                }
            }
        }
        private static void SetUpperScale()
        {
            if (GisEditor.LayerListManager.SelectedLayerListItem == null)
            {
                return;
            }
            ZoomLevel selectedZoomLevel = GisEditor.LayerListManager.SelectedLayerListItem.ConcreteObject as ZoomLevel;

            if (selectedZoomLevel != null)
            {
                FeatureLayer featureLayer = GisEditor.LayerListManager.SelectedLayerListItem.Parent.ConcreteObject as FeatureLayer;
                if (featureLayer != null)
                {
                    int currentZoomLevelIndex = GisEditor.ActiveMap.GetSnappedZoomLevelIndex(GisEditor.ActiveMap.CurrentScale);
                    ZoomLevelHelper.ResetZoomLevelRange(selectedZoomLevel, featureLayer, 1, currentZoomLevelIndex + 1);
                }
            }
        }
        private static void AddStyle(StylePlugin styleProvider)
        {
            Style style = null;
            StyleBuilderArguments arguments           = new StyleBuilderArguments();
            FeatureLayer          currentFeatureLayer = null;

            if (GisEditor.LayerListManager.SelectedLayerListItem == null)
            {
                return;
            }

            //add a new style by right-clicking on a layer node
            if (GisEditor.LayerListManager.SelectedLayerListItem.ConcreteObject is FeatureLayer)
            {
                currentFeatureLayer = (FeatureLayer)GisEditor.LayerListManager.SelectedLayerListItem.ConcreteObject;
            }

            //add a new style by right-clicking on a zoomlevel node
            else if (GisEditor.LayerListManager.SelectedLayerListItem.ConcreteObject is ZoomLevel)
            {
                ZoomLevel editingZoomLevel = (ZoomLevel)GisEditor.LayerListManager.SelectedLayerListItem.ConcreteObject;
                arguments.FromZoomLevelIndex = GisEditor.ActiveMap.GetSnappedZoomLevelIndex(editingZoomLevel.Scale, false) + 1;
                arguments.ToZoomLevelIndex   = (int)editingZoomLevel.ApplyUntilZoomLevel;
                currentFeatureLayer          = (FeatureLayer)GisEditor.LayerListManager.SelectedLayerListItem.Parent.ConcreteObject;
            }

            //replace an existing style
            else if (GisEditor.LayerListManager.SelectedLayerListItem.ConcreteObject is Style)
            {
                Style currentStyle = (Style)GisEditor.LayerListManager.SelectedLayerListItem.ConcreteObject;
                currentFeatureLayer = LayerListHelper.FindMapElementInTree <FeatureLayer>(GisEditor.LayerListManager.SelectedLayerListItem);
            }

            arguments.AvailableStyleCategories = LayerListHelper.GetStyleCategoriesByFeatureLayer(currentFeatureLayer);
            arguments.FeatureLayer             = currentFeatureLayer;
            arguments.FillRequiredColumnNames();
            arguments.AppliedCallback = args =>
            {
                if (args.CompositeStyle != null)
                {
                    ZoomLevelHelper.ApplyStyle(args.CompositeStyle, currentFeatureLayer, args.FromZoomLevelIndex, args.ToZoomLevelIndex);
                }
            };

            style      = styleProvider.GetDefaultStyle();
            style.Name = styleProvider.Name;
            var componentStyle = new CompositeStyle(style)
            {
                Name = currentFeatureLayer.Name
            };

            arguments.StyleToEdit = componentStyle;
            //var styleResults = GisEditor.StyleManager.EditStyle(arguments);
            if (currentFeatureLayer != null)
            {
                var featureLayerPlugin = GisEditor.LayerManager.GetLayerPlugins(currentFeatureLayer.GetType()).FirstOrDefault() as FeatureLayerPlugin;
                if (featureLayerPlugin != null)
                {
                    var styleBuilder = GisEditor.StyleManager.GetStyleBuiderUI();
                    if (styleBuilder != null)
                    {
                        styleBuilder.StyleBuilderArguments = arguments;
                        if (styleBuilder.ShowDialog().GetValueOrDefault())
                        {
                            arguments.AppliedCallback(styleBuilder.StyleBuilderResult);
                        }
                    }
                }
            }
        }