/// <summary>
/// Initializes a new instance of the <see cref="DimensionalBounds"/> class.
/// </summary>
/// <param name="useInitial"></param>
internal DimensionalBounds(bool useInitial)
{
PrimaryBounds = new Bounds();
SecondaryBounds = new Bounds();
TertiaryBounds = new Bounds();
VisiblePrimaryBounds = new Bounds();
VisibleSecondaryBounds = new Bounds();
VisibleTertiaryBounds = new Bounds();
if (!useInitial)
{
return;
}
VisiblePrimaryBounds.AppendValue(0);
VisiblePrimaryBounds.AppendValue(10);
PrimaryBounds.AppendValue(0);
PrimaryBounds.AppendValue(10);
VisibleSecondaryBounds.AppendValue(0);
VisibleSecondaryBounds.AppendValue(10);
SecondaryBounds.AppendValue(0);
SecondaryBounds.AppendValue(10);
VisibleTertiaryBounds.AppendValue(1);
TertiaryBounds.AppendValue(1);
IsEmpty = true;
}
/// <summary>
/// Returns a geoJson map into a heat map.
/// </summary>
/// <param name="geoJson">The geoJson.</param>
/// <param name="values">The values.</param>
/// <param name="heatMap">The heat map.</param>
/// <param name="heatStops">The heat stops.</param>
/// <param name="stroke">The stroke.</param>
/// <param name="fill">The fill.</param>
/// <param name="thickness">The thickness.</param>
/// <param name="projector">The projector.</param>
/// <returns></returns>
public static IEnumerable<PathShape> AsHeatMapShapes(
this GeoJsonFile geoJson,
Dictionary<string, double> values,
LvcColor[] heatMap, List<Tuple<double, LvcColor>> heatStops,
LvcColor stroke,
LvcColor fill,
float thickness,
MapProjector projector)
{
var paths = new List<PathShape>();
var weightBounds = new Bounds();
foreach (var value in values)
{
weightBounds.AppendValue(value.Value);
}
var d = new double[0][][][];
foreach (var feature in geoJson.Features ?? new GeoJsonFeature[0])
{
var name = feature.Properties is not null ? feature.Properties["shortName"] : "";
LvcColor? baseColor = values.TryGetValue(name, out var weight)
? HeatFunctions.InterpolateColor((float)weight, weightBounds, heatMap, heatStops)
: null;
foreach (var geometry in feature.Geometry?.Coordinates ?? d)
{
foreach (var segment in geometry)
{
var path = new PathShape
{
StrokeColor = stroke,
FillColor = baseColor ?? fill,
StrokeThickness = thickness,
IsClosed = true
};
var isFirst = true;
foreach (var point in segment)
{
var p = projector.ToMap(point);
if (isFirst)
{
isFirst = false;
path.AddCommand(new MoveToPathCommand { X = p[0], Y = p[1] });
continue;
}
path.AddCommand(new LineSegment { X = p[0], Y = p[1] });
}
paths.Add(path);
}
}
}
return paths;
}
protected override void Measure()
{
if (series == null)
{
chartView.CoreCanvas.ForEachGeometry((geometry, drawable) =>
{
if (measuredDrawables.Contains(geometry))
{
return; // then the geometry was measured
}
// at this point,the geometry is not required in the UI
geometry.RemoveOnCompleted = true;
});
return;
}
measuredDrawables = new HashSet <IDrawable <TDrawingContext> >();
seriesContext = new SeriesContext <TDrawingContext>(series);
if (legend != null)
{
legend.Draw(this);
}
ValueBounds = new Bounds();
IndexBounds = new Bounds();
PushoutBounds = new Bounds();
foreach (var series in series)
{
if (series.SeriesId == -1)
{
series.SeriesId = nextSeries++;
}
LiveCharts.CurrentSettings.ResolveSeriesDefaults(series);
var seriesBounds = series.GetBounds(this);
ValueBounds.AppendValue(seriesBounds.PrimaryBounds.max);
ValueBounds.AppendValue(seriesBounds.PrimaryBounds.min);
IndexBounds.AppendValue(seriesBounds.SecondaryBounds.max);
IndexBounds.AppendValue(seriesBounds.SecondaryBounds.min);
PushoutBounds.AppendValue(seriesBounds.TertiaryBounds.max);
PushoutBounds.AppendValue(seriesBounds.TertiaryBounds.min);
}
if (viewDrawMargin == null)
{
var m = viewDrawMargin ?? new Margin();
SetDrawMargin(controlSize, m);
SetDrawMargin(controlSize, m);
}
// invalid dimensions, probably the chart is too small
// or it is initializing in the UI and has no dimensions yet
if (drawMarginSize.Width <= 0 || drawMarginSize.Height <= 0)
{
return;
}
foreach (var series in series)
{
series.Measure(this);
}
chartView.CoreCanvas.ForEachGeometry((geometry, drawable) =>
{
if (measuredDrawables.Contains(geometry))
{
return; // then the geometry was measured
}
// at this point,the geometry is not required in the UI
geometry.RemoveOnCompleted = true;
});
Canvas.Invalidate();
}
