/// <summary>
/// Prepares the content for the embeddable control when the tool is activated.
/// </summary>
/// <param name="hasMapViewChanged"></param>
/// <returns></returns>
protected override Task OnToolActivateAsync(bool hasMapViewChanged)
{
// if reference to the view model exists, create one
if (_attributeVM == null)
{
_attributeVM = this.EmbeddableControl as AttributeControlViewModel;
}
// initiate the following code to execute on the MCT
QueuedTask.Run(() =>
{
// get the current selection for the active map
var selectionInMap = ActiveMapView.Map.GetSelection();
// get the first point layer from the map
var pointLayer = ActiveMapView.Map.GetLayersAsFlattenedList().
OfType<FeatureLayer>().
Where(lyr => lyr.ShapeType == ArcGIS.Core.CIM.esriGeometryType.esriGeometryPoint).
FirstOrDefault();
if (pointLayer != null)
{
// if the point layer contains selected features
if (selectionInMap.ContainsKey(pointLayer))
{
// get a list of the selected point features
var selectionDictionary = new Dictionary<MapMember, List<long>>();
selectionDictionary.Add(pointLayer as MapMember, selectionInMap[pointLayer]);
// and store it in the view model, this property populates the tree view
_attributeVM.SelectedMapFeatures = selectionDictionary;
// load the first selected point feature
_attributeVM.AttributeInspector.Load(pointLayer, selectionInMap[pointLayer][0]);
}
// subsribe to the PropertyChanged event for the string attributes
foreach (ArcGIS.Desktop.Editing.Attributes.Attribute featureAttribute in _attributeVM.AttributeInspector)
{
if (featureAttribute.FieldType == FieldType.String)
{
featureAttribute.PropertyChanged += FeatureAttributeChanged;
}
}
}
});
return Task.FromResult(true);
}
private void treeView_SelectedItemChanged(object sender, RoutedPropertyChangedEventArgs<object> e)
{
_vm = this.DataContext as AttributeControlViewModel;
var layerTreeView = sender as TreeView;
var selectedFeature = layerTreeView.Items.CurrentItem;
var selectionLayer = ((KeyValuePair < MapMember, List< long >> )selectedFeature).Key;
if (layerTreeView.SelectedItem.GetType() == typeof(System.Int64))
{
var selectedOID = Convert.ToInt64(layerTreeView.SelectedItem);
_vm.AttributeInspector?.LoadAsync(selectionLayer, selectedOID);
}
else
{
_vm.AttributeInspector.ClearAsync();
}
}
public AttributeControlView()
{
InitializeComponent();
_vm = this.DataContext as AttributeControlViewModel;
}
/// <summary>
/// Clears resources when the tool is deactivated.
/// </summary>
/// <param name="hasMapViewChanged"></param>
/// <returns></returns>
protected override Task OnToolDeactivateAsync(bool hasMapViewChanged)
{
// if we have a valid view model
if (_attributeVM != null)
{
// if there is a valid instance for the attribute inspector
// unsubscribe from the events for the string attributes
if (_attributeVM.AttributeInspector != null)
{
foreach (ArcGIS.Desktop.Editing.Attributes.Attribute featureAttribute in _attributeVM.AttributeInspector)
{
if (featureAttribute.FieldType == FieldType.String)
{
featureAttribute.PropertyChanged -= FeatureAttributeChanged;
}
}
}
// free the embeddable control resources
_attributeVM.InspectorView = null;
_attributeVM.InspectorViewModel.Dispose();
_attributeVM = null;
}
return Task.FromResult(true);
}