/// <summary>
/// Expand cluster from cluster graphic
/// </summary>
/// <param name="clusterGraphic">Cluster graphic to expand</param>
private void _ExpandCluster(ClusterGraphicObject clusterGraphic)
{
if (_mapctrl.IsInEditedMode || _MaxGraphicsToExpandExceeded(clusterGraphic))
return;
if (!_mapctrl.IsInEditedMode)
_mapctrl.SetOpacityToLayers(MapControl.HalfOpacity);
_expandedClusterGraphic = clusterGraphic;
_clusteringLayer.Visible = true;
int count = (int)clusterGraphic.Attributes[ALClusterer.COUNT_PROPERTY_NAME];
Debug.Assert(count > 0);
for (int index = 0; index < count; index++)
{
string attrKey = ALClusterer.GRAPHIC_PROPERTY_NAME + index.ToString();
DataGraphicObject grObj = (DataGraphicObject)clusterGraphic.Attributes[attrKey];
_clusteringLayerColl.Add(grObj.Data);
// support already selected items
if (_mapctrl.SelectedItems.Contains(grObj.Data))
_clusteringLayer.SelectedItems.Add(grObj.Data);
}
_clusterCenter = _mapctrl.map.MapToScreen((MapPoint)clusterGraphic.Geometry);
if (_clusteringLayer.MapLayer.Graphics.Count > MAXIMUM_GRAPHICS_IN_CIRCLE_EXPANDED)
_SetSpiraledPositionsToExpandedClusterGraphics();
else
_SetCircledPositionsToExpandedClusterGraphics();
_CreateLeaderLines();
_expandedClusterGraphic.SetZIndex(ObjectLayer.FRONTZINDEX);
}
