private void LayersChanged(object sender, NotifyCollectionChangedEventArgs args)
{
switch (args.Action)
{
case NotifyCollectionChangedAction.Add:
foreach (ILayer layer in args.NewItems)
{
ILayerListNodeViewModel entry = LayerListMethods.Generate(this.eventAggregator, this.session, this.actionHandler, layer);
int insertIndex = args.NewStartingIndex;
if (insertIndex < this.LayerNodes.Count)
{
this.LayerNodes.Insert(insertIndex++, entry);
}
else
{
this.LayerNodes.Add(entry);
}
}
break;
case NotifyCollectionChangedAction.Remove:
foreach (ILayer layer in args.OldItems)
{
IEnumerable <ILayerListNodeViewModel> toRemove = new ObservableCollection <ILayerListNodeViewModel>(this.LayerNodes.Where(entry => entry.Layer == layer));
foreach (ILayerListNodeViewModel entry in toRemove)
{
this.LayerNodes.Remove(entry);
}
}
break;
case NotifyCollectionChangedAction.Move:
int oldIndex = args.OldStartingIndex;
int newIndex = args.NewStartingIndex;
if (oldIndex != -1 && newIndex != -1)
{
ILayerListNodeViewModel entry = this.LayerNodes[oldIndex];
this.LayerNodes[oldIndex] = this.LayerNodes[newIndex];
this.LayerNodes[newIndex] = entry;
}
break;
default:
break;
}
}
private void UpdateLayers(object sender, NotifyCollectionChangedEventArgs e)
{
switch (e.Action)
{
case NotifyCollectionChangedAction.Add:
foreach (ILayer layer in e.NewItems)
{
ILayerListNodeViewModel entry = LayerListMethods.Generate(this.eventAggregator, this.Session, this.actionHandler, layer);
int insertIndex = e.NewStartingIndex;
if (insertIndex < this.LayerNodes.Count)
{
this.LayerNodes.Insert(insertIndex++, entry);
}
else
{
this.LayerNodes.Add(entry);
}
}
break;
case NotifyCollectionChangedAction.Remove:
foreach (ILayer layer in e.OldItems)
{
ILayerListNodeViewModel toRemove = this.LayerNodes.FirstOrDefault(entry => entry.Layer == layer);
this.LayerNodes.Remove(toRemove);
}
break;
case NotifyCollectionChangedAction.Move:
int oldIndex = e.OldStartingIndex;
int newIndex = e.NewStartingIndex;
if (oldIndex != -1 && newIndex != -1)
{
ILayerListNodeViewModel entry = this.LayerNodes[oldIndex];
this.LayerNodes[oldIndex] = this.LayerNodes[newIndex];
this.LayerNodes[newIndex] = entry;
}
break;
default:
break;
}
}
private void LoadLayers(ObservableCollection <ILayer> layers)
{
this.LayerNodes.Clear();
if (layers == null)
{
return;
}
foreach (ILayer layer in layers)
{
ILayerListNodeViewModel node = LayerListMethods.Generate(this.eventAggregator, this.Session, this.actionHandler, layer);
this.LayerNodes.Add(node);
if (this.Session.CurrentLayer.Value == layer)
{
node.IsSelected.Value = true;
this.selectedNode = node;
}
}
}