private void AddSampleDataToLinesTable(LinesLayer layer, SpatialDataTable dt)
{
int nplines = 15 / Layers.CountAll((l) => l.Visible && l is LinesLayer);
var rnd = new Random(Layers.IndexOf(layer)); // this ensures same data for same layer but different points for different layers
for (int i = 0; i < nplines; ++i)
{
LinesDataRow row = (LinesDataRow)dt.NewRow();
var lineStyle = layer.LineStyle;
row.Latitude0 = rnd.Next(SampleLatMin, SampleLatMax);
row.Longitude0 = rnd.Next(SampleLonMin, SampleLonMax);
row.Latitude1 = rnd.Next(SampleLatMin, SampleLatMax);
row.Longitude1 = rnd.Next(SampleLonMin, SampleLonMax);
row.LineStroke = lineStyle.StrokeColor;
row.DashStyle = lineStyle.DashStyle;
dt.Add(row);
}
}
private Image BuildMap(List <SpatialDataTable> datas, bool designTime)
{
if (designTime)
{
foreach (KmlLayer layer in Layers.FindAll((l) => l is KmlLayer))
{
layer.RemoveFromOwner();
}
}
else
{
var calcLayers = GetCalculatedKmlLayers();
calcLayers.ForEach((l) => l.RemoveFromOwner());
}
_c1mapper.ClearMarks();
_c1mapper.ResetBoundingPoints();
_c1mapper.Width = (this.Width * ScreenDpiX) / TwipsIn;
_c1mapper.Height = (this.Height * ScreenDpiY) / TwipsIn;
// 1st pass: add KML layers, retrieve coordinates from other layers for auto-zoom/center:
foreach (LayerBase layer in Layers.FindAll((l) => l.Visible && (l is KmlLayer || l.Track)))
{
if (layer is KmlLayer)
{
((KmlLayer)layer).SetKmlOnOwner();
}
else // layer.Track
{
SpatialDataTable dt = datas.Find((t) => t.LayerKey == layer.Key);
dt.ForEach((row) => row.ForAllPoints((lon, lat) => _c1mapper.AddBoundingPoint(lon, lat)));
}
}
// now we can auto zoom/center as all relevant spatial data has been given to the mapper:
_c1mapper.DoCenterAndZoom();
// 2nd pass: add points/lines layers:
foreach (LayerBase layer in Layers.FindAll((l) => l.Visible && !(l is KmlLayer)))
{
// considering that no of layers should not be large, this is ok:
SpatialDataTable dt = datas.Find((t) => t.LayerKey == layer.Key);
if (dt.RowType == typeof(PointsDataRow))
{
var l = (PointsLayer)layer;
// clustering:
var clusterDist = l.ClusterDistance;
var maxClusterSize = 0;
if (clusterDist > 0)
{
for (int i = 0; i < dt.Count; ++i)
{
var r = (PointsDataRow)dt[i];
for (int j = dt.Count - 1; j > i; --j)
{
var r2 = (PointsDataRow)dt[j];
if (_c1mapper.DistancePix(r.Longitude, r.Latitude, r2.Longitude, r2.Latitude) < clusterDist)
{
maxClusterSize = Math.Max(maxClusterSize, ++r.Count);
dt.RemoveAt(j);
}
}
}
}
// spread styles among clusters:
var styleCount = l.ClusterStyles != null ? l.ClusterStyles.Count : 0;
var q = l.ClusterDistribution == ScaleType.Linear ? ((styleCount - 1f) / (maxClusterSize - 2f)) : 1f;
// add clustered points to the map:
dt.ForEach((row) =>
{
PointsDataRow r = (PointsDataRow)row;
if (r.Count > 1)
{
r.Caption = r.Count.ToString(CultureInfo.InvariantCulture);
if (styleCount > 0)
{
// we have a style to apply:
int idx;
if (l.ClusterDistribution == ScaleType.Linear)
{
idx = (int)Math.Round((r.Count - 2) * q);
}
else
{
var t = Math.Log(r.Count - 1, maxClusterSize - 1);
if (double.IsNaN(t))
{
t = 0;
}
idx = (int)Math.Round(t * (styleCount - 1d));
}
var s = l.ClusterStyles[idx];
r.Font = s.Font;
r.TextColor = s.TextColor;
r.MarkerShape = s.Shape;
// todo: eval expr here, allow to use Count?
r.MarkerSize = Maps.Util.GetDouble(s.SizeExpr, MarkerStyle.c_SizeValue);
r.MarkerStroke = s.StrokeColor;
r.MarkerFill = s.FillColor;
}
}
_c1mapper.DrawPoint(layer.Key, r.Longitude, r.Latitude, r.Caption, r.Font, r.TextColor, r.MarkerShape, r.MarkerSize, r.MarkerStroke, r.MarkerFill);
}
);
}
else if (dt.RowType == typeof(LinesDataRow))
{
// add lines to the map:
dt.ForEach((row) =>
{
LinesDataRow r = (LinesDataRow)row;
_c1mapper.DrawLine(layer.Key, r.Longitude0, r.Latitude0, r.Longitude1, r.Latitude1, r.LineStroke, r.DashStyle, r.LineThickness);
}
);
}
}
// done:
return(_c1mapper.GetImage(TargetDpi, TargetDpi));
}