/// <summary>
/// Set map positions to graphics in clustering layer by spiral
/// </summary>
/// <param name="count"></param>
private void _SetSpiraledPositionsToExpandedClusterGraphics()
{
int count = _clusteringLayer.MapLayer.Graphics.Count;
double radius = MINIMAL_EXPANDED_CLUSTER_RADIUS;
double dRadius = START_DELTA_RADIUS;
double angle = START_ANGLE;
double dAngle = START_DELTA_ANGLE;
for (int index = 0; index < count; index++)
{
double dx = radius * Math.Cos(angle);
double dy = radius * Math.Sin(angle);
DataGraphicObject graphic = (DataGraphicObject)_clusteringLayer.MapLayer.Graphics[index];
MarkerSymbol symbol = (MarkerSymbol)graphic.Symbol;
System.Windows.Point symbolPoint = _mapctrl.map.MapToScreen((MapPoint)graphic.Geometry);
symbol.OffsetX = -(dx + _clusterCenter.Value.X - symbolPoint.X);
symbol.OffsetY = -(dy + _clusterCenter.Value.Y - symbolPoint.Y);
graphic.SetZIndex(ObjectLayer.FRONTZINDEX);
radius += dRadius;
dRadius *= DELTA_RADIUS_MULTIPLIER;
angle += dAngle;
dAngle *= DELTA_ANGLE_MULTIPLIER;
}
_expandedAreaRadius = radius + ADDITIONAL_EXPANDED_AREA;
}
/// <summary>
/// Set map positions to graphics in clustering layer by circle
/// </summary>
private void _SetCircledPositionsToExpandedClusterGraphics()
{
int count = _clusteringLayer.MapLayer.Graphics.Count;
// do visual expand
double sinus = Math.Sin(Math.PI / count);
double radius = DIST_BETWEEN_EXPANDED_SYMBOLS / (2 * sinus);
if (radius < MINIMAL_EXPANDED_CLUSTER_RADIUS)
{
radius = MINIMAL_EXPANDED_CLUSTER_RADIUS;
}
_expandedAreaRadius = radius + ADDITIONAL_EXPANDED_AREA;
for (int index = 0; index < count; index++)
{
double angle = (2 * Math.PI / count) * index;
double dx = radius * Math.Cos(angle);
double dy = radius * Math.Sin(angle);
DataGraphicObject graphic = (DataGraphicObject)_clusteringLayer.MapLayer.Graphics[index];
MarkerSymbol symbol = (MarkerSymbol)graphic.Symbol;
System.Windows.Point symbolPoint = _mapctrl.map.MapToScreen((MapPoint)graphic.Geometry);
symbol.OffsetX = dx - _clusterCenter.Value.X + symbolPoint.X;
symbol.OffsetY = dy - _clusterCenter.Value.Y + symbolPoint.Y;
graphic.SetZIndex(ObjectLayer.FRONTZINDEX);
}
}
