/// <summary>
/// Initializes a new instance of the <see cref="Legend"/> class.
/// </summary>
public Legend()
{
DefaultStyleKey = typeof(Legend);
_legendTree = new LegendTree();
_legendTree.Refreshed += OnRefreshed;
_legendTree.PropertyChanged += LegendTree_PropertyChanged;
}
//private void AddGroupChildLayers()
//{
// if (Layer is GroupLayerBase)
// {
// ObservableCollection<LayerItemViewModel> mapLayerItems = new ObservableCollection<LayerItemViewModel>();
// if ((Layer as GroupLayerBase).ChildLayers != null)
// {
// foreach (Layer layer in (Layer as GroupLayerBase).ChildLayers)
// {
// Layer layerToFind = layer;
// MapLayerItem mapLayerItem = LayerItems == null ? null : LayerItems.FirstOrDefault(item => item.Layer == layerToFind) as MapLayerItem;
// if (mapLayerItem == null || mapLayerItems.Contains(mapLayerItem)) // else reuse existing map layer item to avoid querying again the legend and lose the item states (note : contains test if for the degenerated case where a layer is twice or more in a group layer)
// {
// // Create a new map layer item
// mapLayerItem = new MapLayerItem(layer) { LegendTree = this.LegendTree };
// if (_dispatcher != null)
// _dispatcher.BeginInvoke(new Action(() => mapLayerItem.Refresh()));
// else
// mapLayerItem.Refresh();
// }
// mapLayerItems.Add(mapLayerItem);
// }
// }
// LayerItems = mapLayerItems;
// // Don't display the AcceleratedDisplayLayers root node
// if (Layer is AcceleratedDisplayLayers)
// IsTransparent = true;
// }
//}
//// KML Layer case : if a KML layer has only a child which is not another KML layer ==> set the child item as transparent so it doesn't appear in the legend
//private void ProcessKmlLayer()
//{
// // Must be a group layer (KmlLayer inherits from GroupLayer)
// if (!(Layer is GroupLayer))
// return;
// // Must have only one child
// LayerCollection layers = (Layer as GroupLayer).ChildLayers;
// if (layers == null || layers.Count() != 1)
// return;
// // The child must not be a KMLLayer i.e. not a group layer (sub folder and sub document must not be removed from the legend)
// Layer childLayer = layers.FirstOrDefault();
// if (childLayer is GroupLayer)
// return;
// // The layer must be a KmlLayer
// if (!IsKmlLayer())
// return;
// // Set the child as transparent
// LayerItemViewModel childLayerItem = LayerItems == null ? null : LayerItems.FirstOrDefault();
// if (childLayerItem != null)
// childLayerItem.IsTransparent = true;
//}
// check that the layer inherits from kmllayer by using name in order to avoid a reference to DataSources project
//private bool IsKmlLayer()
//{
// Type type = Layer.GetType();
// while (type != null)
// {
// if ( type.Name == "KmlLayer")
// return true;
// type = type.BaseType;
// }
// return false;
//}
#endregion
#region Attach/Detach
internal override void Attach(LegendTree legendTree)
{
if (legendTree == null)
return;
base.Attach(legendTree);
AttachLayerEventHandler(Layer);
}
