internal void RefreshFeatureInteractors()
{
var selectedFeaturesWithLayer = SelectedFeatureInteractors.Select(fe => new { Feature = fe.SourceFeature, fe.Layer }).ToList();
SelectedFeatureInteractors.Clear();
selectedFeaturesWithLayer.ForEach(fl => SelectedFeatureInteractors.Add(GetFeatureInteractor(fl.Layer, fl.Feature)));
SynchronizeTrackers();
}
private void Clear(bool fireSelectionChangedEvent)
{
SelectedFeatureInteractors.Clear();
if (trackingLayer.DataSource.GetFeatureCount() <= 0)
{
return;
}
trackers.Clear();
trackingLayer.RenderRequired = true;
UpdateMapControlSelection(fireSelectionChangedEvent);
}
private void RemoveSelection(IFeature feature)
{
for (int i = 0; i < SelectedFeatureInteractors.Count; i++)
{
if (ReferenceEquals(SelectedFeatureInteractors[i].SourceFeature, feature))
{
SelectedFeatureInteractors.RemoveAt(i);
break;
}
}
UpdateMapControlSelection();
}
private void UpdateMapControlSelection(bool fireSelectionChangedEvent)
{
SynchronizeTrackers();
IList <IFeature> selectedFeatures = SelectedFeatureInteractors.Select(t => t.SourceFeature).ToList();
MapControl.SelectedFeatures = selectedFeatures;
if (fireSelectionChangedEvent && SelectionChanged != null)
{
SelectionChanged(this, null);
}
}
/// TODO: note if no features are selected the selection rectangle maintains visible after mouse up
/// ISSUE 2373
private void HandleMultiSelectMouseUp(Coordinate worldPosition)
{
StopMultiSelect();
List <IFeature> selectedFeatures = null;
if (!KeyExtendSelection)
{
selectedFeatures = new List <IFeature>(SelectedFeatureInteractors.Select(fe => fe.SourceFeature).ToArray());
Clear(false);
}
var selectionPolygon = CreateSelectionPolygon(worldPosition);
if (null != selectionPolygon)
{
foreach (ILayer layer in Map.GetAllVisibleLayers(false))
{
//make sure parent layer is selectable or null
var parentLayer = Map.GetGroupLayerContainingLayer(layer);
if ((parentLayer == null || parentLayer.IsSelectable) && (layer.IsSelectable) && (layer is VectorLayer))
{
// do not use the maptool provider but the datasource of each layer.
var vectorLayer = (VectorLayer)layer;
var multiFeatures = vectorLayer.GetFeatures(selectionPolygon).Take(5000);
foreach (IFeature feature in multiFeatures)
{
if ((null != selectedFeatures) && (selectedFeatures.Contains(feature)))
{
continue;
}
AddSelection(vectorLayer, feature, false);
}
}
}
}
else
{
// if mouse hasn't moved handle as single select. A normal multi select uses the envelope
// of the geometry and this has as result that unwanted features will be selected.
ILayer selectedLayer;
var limit = (float)MapHelper.ImageToWorld(Map, 4);
var nearest = FindNearestFeature(worldPosition, limit, out selectedLayer, ol => ol.Visible);
if (null != nearest)
{
AddSelection(selectedLayer, nearest, false);
}
}
// synchronize with map selection, possible check if selection is already set; do not remove
UpdateMapControlSelection(true);
}
public void AddSelection(ILayer layer, IFeature feature, bool synchronizeUI = true)
{
if (!layer.Visible)
{
return;
}
var featureInteractor = GetFeatureInteractor(layer, feature);
if (null == featureInteractor)
{
return;
}
SelectedFeatureInteractors.Add(featureInteractor);
if (synchronizeUI)
{
UpdateMapControlSelection();
}
}
private bool StartSelection(ILayer layer, IFeature feature)
{
var featureInteractor = GetFeatureInteractor(layer, feature);
if (null == featureInteractor)
{
return(false);
}
if (featureInteractor.AllowSingleClickAndMove())
{
// do not yet select, but allow MltiSelect
SelectedFeatureInteractors.Add(featureInteractor);
SynchronizeTrackers();
UpdateMapControlSelection();
return(true);
}
return(false);
}
private IFeatureInteractor GetActiveFeatureInteractor(IFeature feature)
{
return(SelectedFeatureInteractors.FirstOrDefault(t => ReferenceEquals(t.SourceFeature, feature)));
}
/// <summary>
/// Checks if selected features are actually need to be selected.
/// </summary>
public void RefreshSelection()
{
var layers = Map.GetAllVisibleLayers(true).ToArray();
SelectedFeatureInteractors.Where(i => !layers.Contains(i.Layer)).ToList().ForEach(i => RemoveSelection(i.SourceFeature));
}