/// <summary>${WP_mapping_FeaturesClusterer_method_OnCreateFeature_D}</summary>
/// <param name="cluster">${WP_mapping_FeaturesClusterer_method_OnCreateFeature_param_cluster}</param>
/// <param name="center">${WP_mapping_FeaturesClusterer_method_OnCreateFeature_param_center}</param>
/// <param name="maxClusterCount">${WP_mapping_FeaturesClusterer_method_OnCreateFeature_param_maxClusterCount}</param>
protected override Feature OnCreateFeature(FeatureCollection cluster, GeoPoint center, int maxClusterCount)
{
lastFC = cluster;
lastCenter = center;
lastMaxClusterCount = maxClusterCount;
if (cluster.Count == 1)
{
return cluster[0];
}
Feature feature = null;
double size = (Math.Log((double)(cluster.Count / 10)) * 10.0) + 20.0;//小于10个,size都是负无穷
if (size < 12.0)
{
size = 12.0;
}
if (cluster.Count <= this.MaximumCount)
{
if (!this.cache.ContainsKey(cluster.Count))
{
ScatterStyle style = new ScatterStyle(cluster.Count, EnableRotation)
{
ForeColor = this.Foreground,
FillColor = this.Background
};
this.cache.Add(cluster.Count, style);
}//如果没有这种 样式，就创建新的样式。 根据Count决定。
ScatterStyle style3 = this.cache[cluster.Count];
feature = new Feature
{
Geometry = center,
Style = style3
};
}
else
{
feature = new ClusterFeature(size)
{
Geometry = center
};
}//如果不达到聚合数(太多，比如大于10)，则去生成新的样式
feature.Attributes.Add("Count", cluster.Count);
feature.Attributes.Add("Size", size);
feature.Attributes.Add("Color", ClusterUtil.InterpolateColor((double)cluster.Count, maxClusterCount, this.Gradient));
return feature;
}
private static Dictionary<int, Cluster> MergeOverlappingClusters(double diameter, Dictionary<int, Cluster> orig, GeoPoint lowerLeft, out bool overlapExists, BackgroundWorker worker)
{
overlapExists = false;
Dictionary<int, Cluster> dictionary = new Dictionary<int, Cluster>();
foreach (int key in orig.Keys)
{
Cluster cluster = orig[key];
if (cluster.Count != 0)
{
overlapExists = SearchAndMerge(cluster, -1, -1, diameter, orig, overlapExists);
overlapExists = SearchAndMerge(cluster, -1, 0, diameter, orig, overlapExists);
overlapExists = SearchAndMerge(cluster, -1, 1, diameter, orig, overlapExists);
overlapExists = SearchAndMerge(cluster, 0, -1, diameter, orig, overlapExists);
overlapExists = SearchAndMerge(cluster, 0, 1, diameter, orig, overlapExists);
overlapExists = SearchAndMerge(cluster, 1, -1, diameter, orig, overlapExists);
overlapExists = SearchAndMerge(cluster, 1, 0, diameter, orig, overlapExists);
overlapExists = SearchAndMerge(cluster, 1, 1, diameter, orig, overlapExists);
int x = (int)Math.Round((double)((cluster.X - lowerLeft.X) / diameter));
int y = (int)Math.Round((double)((cluster.Y - lowerLeft.Y) / diameter));
cluster.Cx = x;
cluster.Cy = y;
int num4 = (x << 16) | y;
dictionary[num4] = cluster;
if (worker.CancellationPending)
{
return null;
}
}
}
return dictionary;
}
/// <summary>${WP_mapping_FeaturesClusterer_method_OnCreateFeature_D}</summary>
/// <param name="cluster">${WP_mapping_FeaturesClusterer_method_OnCreateFeature_param_cluster}</param>
/// <param name="center">${WP_mapping_FeaturesClusterer_method_OnCreateFeature_param_center}</param>
/// <param name="maxClusterCount">${WP_mapping_FeaturesClusterer_method_OnCreateFeature_param_maxClusterCount}</param>
protected abstract Feature OnCreateFeature(FeatureCollection cluster, GeoPoint center, int maxClusterCount);
//遍历每一个点，把其归类，得到最终的聚类点Cluster,其所在格网index的X/Y组成Key
private static Dictionary<int, Cluster> AssignGeoPointsToClusters(IEnumerable<Feature> features, GeoPoint bottomLeft, double diameter)
{
Dictionary<int, Cluster> dictionary = new Dictionary<int, Cluster>();
GeoPoint gp = null;
foreach (Feature feature in features)
{
if (feature.Geometry == null)
{
continue;
}
if (feature.Geometry is GeoPoint)
{
gp = feature.Geometry as GeoPoint;
}
else
{
Rectangle2D bounds = feature.Geometry.Bounds;
if (bounds.IsEmpty)
{
continue;
}
gp = new GeoPoint(bounds.Center.X, bounds.Center.Y);
}
double x = gp.X;
double y = gp.Y;
int cx = (int)Math.Round((x - bottomLeft.X) / diameter);
int cy = (int)Math.Round((y - bottomLeft.Y) / diameter);
int key = (cx << 16) | cy;//int是32位的 左16位是x，右16位是y
if (dictionary.ContainsKey(key))
{
Cluster cluster = dictionary[key];
cluster.X = (cluster.X + x) / 2.0;
cluster.Y = (cluster.Y + y) / 2.0;
cluster.Features.Add(feature);
}//有就合并
else
{
dictionary[key] = new Cluster(x, y, cx, cy);
dictionary[key].Features.Add(feature);
}//没有就new一个
}
return dictionary;
}
private static Dictionary<int, Cluster> AssignGeoPointsToClusters(IEnumerable<Feature> features, ObservableCollection<GeoRegion> geos)
{
Dictionary<int, Cluster> dictionary = new Dictionary<int, Cluster>();
GeoPoint gp = null;
foreach (Feature feature in features)
{
if (feature.Geometry == null)
{
continue;
}
gp = feature.Geometry as GeoPoint;
if (gp == null)
{
Rectangle2D bounds = feature.Geometry.Bounds;
if (bounds.IsEmpty)
{
continue;
}
gp = new GeoPoint(bounds.Center.X, bounds.Center.Y);
}
bool isContained = false;
double x = gp.X;
double y = gp.Y;
foreach (GeoRegion clusterRegion in geos)
{
if (clusterRegion.Bounds.Contains(x, y) && clusterRegion.Contains(x, y))
{
int key = -geos.IndexOf(clusterRegion);
if (dictionary.ContainsKey(key))
{
Cluster cluster = dictionary[key];
cluster.X += x;
cluster.Y += y;
cluster.Features.Add(feature);
}//有就合并
else
{
dictionary[key] = new Cluster(x, y);
dictionary[key].Features.Add(feature);
}//没有就new一个
isContained = true;
break;
}
}
int key1 = feature.GetHashCode();
if (!isContained)
{
if (!dictionary.ContainsKey(key1))
{
dictionary[key1] = new Cluster(gp.X, gp.Y);
dictionary[key1].Features.Add(feature);
}
}
}
Cluster cltValue;
int featuresCount = 0;
foreach (var clt in dictionary)
{
cltValue = clt.Value;
featuresCount = cltValue.Features.Count;
clt.Value.X = cltValue.X / featuresCount;
clt.Value.Y = cltValue.Y / featuresCount;
}
return dictionary;
}
private static GeoPoint GetBottomLeft(IEnumerable<Feature> features)
{
GeoPoint point = new GeoPoint(double.MaxValue, double.MaxValue);
foreach (Feature f in features)
{
if ((f != null) && (f.Geometry != null))
{
GeoPoint geometry = f.Geometry as GeoPoint;
if (geometry == null)
{
geometry = new GeoPoint(f.Geometry.Bounds.Center.X, f.Geometry.Bounds.Center.Y); ;
}
if (!double.IsNaN(geometry.X) && !double.IsNaN(geometry.Y))
{
point.X = Math.Min(point.X, geometry.X);
point.Y = Math.Min(point.Y, geometry.Y);
}
}
}
return point;
}
//private void Button_Click_3(object sender, RoutedEventArgs e)
//{
// DrawLine line = new DrawLine(this.MyMap);
// this.MyMap.Action = line;
// // this.featuresLayer.ClearFeatures();
// line.DrawCompleted += new EventHandler<DrawEventArgs>(line_DrawCompleted);
//}
//private void line_DrawCompleted(object sender, DrawEventArgs e)
//{
// this.featuresLayer.ClearFeatures();
// Feature feature = new Feature { Geometry=e.Geometry};
// //this.elementLayer.Children.Add(e.Element);
// this.featuresLayer.AddFeature(feature);
//}
//private void Button_Click_4(object sender, RoutedEventArgs e)
//{
// DrawPolygon polygon = new DrawPolygon(this.MyMap);
// this.MyMap.Action = polygon;
// polygon.DrawCompleted += new EventHandler<DrawEventArgs>(polygon_DrawCompleted);
//}
//private void polygon_DrawCompleted(object sender, DrawEventArgs e)
//{
// this.featuresLayer.ClearFeatures();
// Feature feature = new Feature { Geometry=e.Geometry};
// this.featuresLayer.AddFeature(feature);
//}
private void Button_Click_5(object sender, RoutedEventArgs e)
{
Feature f = new Feature();
//f.Tap += f_Tap;
//f.MouseEnter += f_MouseEnter;
//f.MouseLeave += f_MouseLeave;
//f.MouseLeftButtonDown += f_MouseLeftButtonDown;
//f.MouseLeftButtonUp += f_MouseLeftButtonUp;
//f.MouseMove+=f_MouseMove;
GeoPoint point = new GeoPoint(0, 0);
PredefinedMarkerStyle style = new PredefinedMarkerStyle();
style.Color = new SolidColorBrush(Colors.Red);
style.Size = 80;
style.Symbol = PredefinedMarkerStyle.MarkerSymbol.Circle;
f.Geometry = point;
f.Style = style;
this.featuresLayer.AddFeature(f);
}
//预留接口
private static GeoPoint ToGeoPoint(XElement xe)
{
GeoPoint point = new GeoPoint();
return point;
}
//添加虚拟顶点；
private Feature addHoverVertex(Feature feature , GeoPoint p , int index , int partIndex)
{
Feature hoverVertex = new Feature() { Geometry = p , Style = HoverVertexStyle };
hoverVertex.SetZIndex(2);
hoverLayer.Features.Add(hoverVertex);
hoverVertex.Attributes.Add("Feature" , feature);
hoverVertex.Attributes.Add("Index" , index);
hoverVertex.Attributes.Add("PartIndex" , partIndex);
hoverVertex.AddDoubleClick((s , e) => { deleteOneVertex(s as Feature); });//双击删除某个顶点，线和面。
return hoverVertex;
}
//当线对象时，显示bounds的中心点；
private void addCenterFeature(Feature feature)
{
GeoPoint center = new GeoPoint(feature.Geometry.Bounds.Center.X , feature.Geometry.Bounds.Center.Y);
hoverCenterFeature = new Feature { Geometry = center , Style = HoverCenterStyle };
hoverCenterFeature.SetZIndex(3);
hoverLayer.AddFeature(hoverCenterFeature);
}
private static string convertToString(GeoPoint value)
{
CultureInfo invariantCulture = CultureInfo.InvariantCulture;
string listSeparator = invariantCulture.TextInfo.ListSeparator;
return string.Format(invariantCulture, "{0}{2}{1}", new object[] { value.X, value.Y, listSeparator });
}