protected override void OnRender(DrawingContext drawingContext)
{
if (Plotter2D == null)
{
return;
}
if (Collection == null)
{
return;
}
if (DataSource == null)
{
return;
}
if (Collection.Lines.Count == 0)
{
IsolineBuilder.DataSource = DataSource;
IsolineBuilder.MissingValue = MissingValue;
Collection = IsolineBuilder.BuildIsoline();
}
IsolineCollection = Collection;
var dc = drawingContext;
var strokeThickness = StrokeThickness;
var collection = Collection;
var bounds = DataRect.Empty;
// determining content bounds
foreach (LevelLine line in collection)
{
foreach (Point point in line.AllPoints)
{
bounds.Union(point);
}
}
Viewport2D.SetContentBounds(this, bounds);
ViewportPanel.SetViewportBounds(this, bounds);
if (bounds.IsEmpty)
{
return;
}
// custom transform with output set to renderSize of this control
var transform = Plotter2D.Transform.WithRects(bounds, new Rect(RenderSize));
// actual drawing of isolines
RenderIsolineCollection(dc, strokeThickness, collection, transform);
RenderLabels(dc, collection);
}
/// <summary>
/// This method is called when data source changes.
/// </summary>
protected virtual void UpdateDataSource()
{
if (dataSource != null)
{
IsolineBuilder.DataSource = dataSource;
collection = IsolineBuilder.Build();
}
else
{
collection = null;
}
}
protected override void UpdateDataSource()
{
if (DataSource != null)
{
IsolineBuilder.DataSource = DataSource;
IsolineBuilder.MissingValue = MissingValue;
Collection = IsolineBuilder.BuildIsoline();
}
else
{
Collection = null;
}
}
protected override void OnRender(DrawingContext drawingContext)
{
if (Plotter2D == null)
{
return;
}
if (DataSource == null)
{
return;
}
var collection = (IsolineCollection)Parent.GetValue(IsolineCollectionProperty);
if (collection == null)
{
return;
}
var bounds = ViewportPanel.GetViewportBounds(this);
if (bounds.IsEmpty)
{
return;
}
var dc = drawingContext;
var strokeThickness = StrokeThickness;
var transform = Plotter2D.Transform.WithRects(bounds, new Rect(RenderSize));
//dc.DrawRectangle(null, new Pen(Brushes.Green, 2), new Rect(RenderSize));
var additionalLevels = GetAdditionalLevels(collection);
IsolineBuilder.DataSource = DataSource;
var additionalIsolineCollections = additionalLevels.Select(level =>
{
return(IsolineBuilder.BuildIsoline(level));
});
foreach (var additionalCollection in additionalIsolineCollections)
{
RenderIsolineCollection(dc, strokeThickness, additionalCollection, transform);
}
}
protected override void OnRender(DrawingContext drawingContext)
{
if (Plotter2D == null)
{
return;
}
if (DataSource == null)
{
return;
}
if (Collection == null)
{
return;
}
if (Collection.Lines.Count == 0)
{
IsolineBuilder.DataSource = DataSource;
}
var dc = drawingContext;
var dataSource = DataSource;
var localMinMax = dataSource.GetMinMax();
var globalMinMax = dataSource.Range.Value;
double lengthsRatio = globalMinMax.GetLength() / localMinMax.GetLength();
if (lengthsRatio > 16)
{
double log = Math.Round(Math.Log(lengthsRatio, 2));
double number = 2 * Math.Pow(2, log);
double delta = globalMinMax.GetLength() / number;
double start = Math.Floor((localMinMax.Min - globalMinMax.Min) / delta) * delta + globalMinMax.Min;
double end = localMinMax.Max;
var transform = Plotter2D.Transform;
var strokeThickness = StrokeThickness;
double x = start;
while (x < end)
{
var collection = IsolineBuilder.BuildIsoline(x);
foreach (LevelLine line in collection)
{
StreamGeometry lineGeometry = new StreamGeometry();
using (var context = lineGeometry.Open())
{
context.BeginFigure(line.StartPoint.ViewportToScreen(transform), false, false);
context.PolyLineTo(line.OtherPoints.ViewportToScreen(transform).ToArray(), true, true);
}
lineGeometry.Freeze();
var paletteRatio = (line.RealValue - globalMinMax.Min) / globalMinMax.GetLength();
Pen pen = new Pen(new SolidColorBrush(Palette.GetColor(paletteRatio)), strokeThickness);
dc.DrawGeometry(null, pen, lineGeometry);
}
x += delta;
}
}
//dc.DrawRectangle(Brushes.Green.MakeTransparent(0.3), null, new Rect(RenderSize));
}
