namespace ExampleCodeSnippets

{

[NUnit.Framework.TestFixture]

public class PolygonSymbolizerTest

{

private class ModifiedBasicPolygonSymbolizer : SharpMap.Rendering.Symbolizer.BasicPolygonSymbolizer

{

private System.Drawing.Point _oldRenderOrigin;

public override void Begin(System.Drawing.Graphics g, SharpMap.MapViewport map, int aproximateNumberOfGeometries)

{

base.Begin(g, map, aproximateNumberOfGeometries);

_oldRenderOrigin = g.RenderingOrigin;

}

protected override void OnRenderInternal(SharpMap.MapViewport map, GeoAPI.Geometries.IPolygon polygon, System.Drawing.Graphics g)

{

var pt = polygon.Centroid;

g.RenderingOrigin =

System.Drawing.Point.Truncate(map.WorldToImage(pt.Coordinate));

base.OnRenderInternal(map, polygon, g);

}

public override void End(System.Drawing.Graphics g, SharpMap.MapViewport map)

{

g.RenderingOrigin = _oldRenderOrigin;

}

}

[NUnit.Framework.OneTimeSetUp]

public void OneTimeSetUp()

{ }

[NUnit.Framework.Test]

public void TestPlainPolygonSymbolizer()

{

var provider = new SharpMap.Data.Providers.ShapeFile(

"..\\..\\..\\WinFormSamples\\GeoData\\World\\countries.shp", true);

var l = new SharpMap.Layers.Symbolizer.PolygonalVectorLayer("Countries", provider);

l.Symbolizer = new ModifiedBasicPolygonSymbolizer

{

Fill = new System.Drawing.Drawing2D.HatchBrush(

System.Drawing.Drawing2D.HatchStyle.WideDownwardDiagonal,

System.Drawing.Color.Red /*,

System.Drawing.Color.LightPink*/),

UseClipping = false,

//Outline = System.Drawing.Pens.AliceBlue

};

var m = new SharpMap.Map(new System.Drawing.Size(1440, 1080)) { BackColor = System.Drawing.Color.Cornsilk };

m.Layers.Add(l);

m.ZoomToExtents();

var sw = new System.Diagnostics.Stopwatch();

var img = m.GetMap();

sw.Start();

img = m.GetMap();

img.Save("PolygonSymbolizer-1.bmp", System.Drawing.Imaging.ImageFormat.Bmp);

sw.Stop();

System.Console.WriteLine(string.Format("Rendering new method:{0}ms", sw.ElapsedMilliseconds));

l.Symbolizer = new SharpMap.Rendering.Symbolizer.BasicPolygonSymbolizer()

{

Fill = new System.Drawing.Drawing2D.HatchBrush(

System.Drawing.Drawing2D.HatchStyle.WideDownwardDiagonal,

System.Drawing.Color.Red/*,

System.Drawing.Color.LightPink*/),

UseClipping = false,

//Outline = System.Drawing.Pens.AliceBlue

};

sw.Reset(); sw.Start();

img = m.GetMap();

img.Save("PolygonSymbolizer-2.bmp", System.Drawing.Imaging.ImageFormat.Bmp);

sw.Stop();

System.Console.WriteLine(string.Format("Rendering new method:{0}ms", sw.ElapsedMilliseconds));

}

}

}