/// <summary>
/// Creates a new <see cref="AttributePresenter"/> with the given map and view.
/// </summary>
/// <param name="map">The map model to observe and control.</param>
/// <param name="view">The view to use to display attribute data.</param>
public AttributePresenter(Map map, IAttributeView view)
: base(map, view)
{
Trace.Info(TraceCategories.Presentation, "Creating AttributePresenter");
View.FeaturesHighlightedChanged += handleViewFeaturesHighlightedChanged;
View.Layers = Map.Layers;
}
//private void handleLayersChanged(Object sender, ListChangedEventArgs e)
//{
// IFeatureLayer newLayer = null;
// IFeatureLayer oldLayer = null;
// if (e.NewIndex >= 0 && e.NewIndex < Map.Layers.Count)
// {
// newLayer = Map.Layers[e.NewIndex] as IFeatureLayer;
// }
// if (e.OldIndex >= 0 && e.OldIndex < Map.Layers.Count && _highlightUpdating)
// {
// oldLayer = Map.Layers[e.OldIndex] as IFeatureLayer;
// }
// if (newLayer != null && e.ListChangedType == ListChangedType.ItemAdded)
// {
// wireupFeatureLayer(newLayer);
// }
// // BUG: this shouldn't work... e.OldIndex won't be the old layer
// // index if it was deleted...
// // TODO: make unit test which confirms or refutes the above bug
// if (oldLayer != null &&
// e.NewIndex < 0 &&
// e.ListChangedType == ListChangedType.ItemDeleted)
// {
// unwireFeatureLayer(oldLayer);
// }
//}
private void handleViewFeaturesHighlightedChanged(Object sender,
FeaturesHighlightedChangedEventArgs e)
{
Trace.Info(TraceCategories.Presentation, "AttributePresenter handling " +
"view features highlighted changed");
#if DEBUG
Trace.Debug(TraceCategories.Presentation, "Layer on which highlight change: " +
e.LayerName);
Trace.Debug(TraceCategories.Presentation, "Highlighted features: " +
EnumerablePrinter.Print(e.HighlightedFeatures));
#endif
if (_highlightUpdating)
{
return;
}
ILayer layer = Map.Layers[e.LayerName];
IFeatureLayer featureLayer = layer as IFeatureLayer;
if (featureLayer == null)
{
LayerGroup group = layer as LayerGroup;
if (group != null)
{
featureLayer = group.MasterLayer as IFeatureLayer;
}
}
Assert.IsNotNull(featureLayer);
FeatureQueryExpression viewDefinition = featureLayer.HighlightedFilter;
IEnumerable oids = getFeatureIdsFromIndexes(featureLayer, e.HighlightedFeatures);
OidCollectionExpression oidExpression = new OidCollectionExpression(oids);
if (viewDefinition == null)
{
viewDefinition = new FeatureQueryExpression(new AllAttributesExpression(),
oidExpression, null);
}
else
{
ProjectionExpression projection = viewDefinition.Projection;
if (viewDefinition.SpatialPredicate == null)
{
viewDefinition = new FeatureQueryExpression(projection, oidExpression, null);
}
else
{
PredicateExpression predicate = new BinaryExpression(viewDefinition.SpatialPredicate,
BinaryOperator.And,
oidExpression);
viewDefinition = new FeatureQueryExpression(projection, predicate, null);
}
}
_highlightUpdating = true;
featureLayer.HighlightedFilter = viewDefinition;
_highlightUpdating = false;
}