using System;

using System.Collections.Generic;

using System.Drawing.Drawing2D;

using System.Drawing.Imaging;

using System.Text;

using SharpMap.Layers;

using System.Drawing;

using SharpMap.Styles;

#if DotSpatialProjections

using DotSpatial.Projections;

#else

using GeoAPI.CoordinateSystems.Transformations;

using ProjNet.CoordinateSystems.Transformations;

using GeoAPI.CoordinateSystems;

using ProjNet.CoordinateSystems;

#endif

namespace WinFormSamples

{

static class LayerTools

{

private static ICoordinateTransformation dhdn2towgs84;

private static ICoordinateTransformation wgs84toGoogle;

private static ICoordinateTransformation googletowgs84;

/// <summary>

/// Wgs84 to Google Mercator Coordinate Transformation

/// </summary>

public static ICoordinateTransformation Wgs84toGoogleMercator

{

get

{

if (wgs84toGoogle == null)

{

#if DotSpatialProjections

wgs84toGoogle = new CoordinateTransformation()

{

Source = KnownCoordinateSystems.Geographic.World.WGS1984,

Target = KnownCoordinateSystems.Projected.World.WebMercator

};

#else

CoordinateSystemFactory csFac = new ProjNet.CoordinateSystems.CoordinateSystemFactory();

CoordinateTransformationFactory ctFac = new CoordinateTransformationFactory();

IGeographicCoordinateSystem wgs84 = csFac.CreateGeographicCoordinateSystem(

"WGS 84", AngularUnit.Degrees, HorizontalDatum.WGS84, PrimeMeridian.Greenwich,

new AxisInfo("north", AxisOrientationEnum.North), new AxisInfo("east", AxisOrientationEnum.East));

List<ProjectionParameter> parameters = new List<ProjectionParameter>();

parameters.Add(new ProjectionParameter("semi_major", 6378137.0));

parameters.Add(new ProjectionParameter("semi_minor", 6378137.0));

parameters.Add(new ProjectionParameter("latitude_of_origin", 0.0));

parameters.Add(new ProjectionParameter("central_meridian", 0.0));

parameters.Add(new ProjectionParameter("scale_factor", 1.0));

parameters.Add(new ProjectionParameter("false_easting", 0.0));

parameters.Add(new ProjectionParameter("false_northing", 0.0));

IProjection projection = csFac.CreateProjection("Google Mercator", "mercator_1sp", parameters);

IProjectedCoordinateSystem epsg900913 = csFac.CreateProjectedCoordinateSystem(

"Google Mercator", wgs84, projection, LinearUnit.Metre, new AxisInfo("East", AxisOrientationEnum.East),

new AxisInfo("North", AxisOrientationEnum.North));

((CoordinateSystem)epsg900913).DefaultEnvelope = new [] { -20037508.342789, -20037508.342789, 20037508.342789, 20037508.342789 };

wgs84toGoogle = ctFac.CreateFromCoordinateSystems(wgs84, epsg900913);

#endif

}

return wgs84toGoogle;

}

}

/// <summary>

/// Wgs84 to Google Mercator Coordinate Transformation

/// </summary>

public static ICoordinateTransformation Dhdn2ToWgs84

{

get

{

if (dhdn2towgs84 == null)

{

#if DotSpatialProjections

var piSource = ProjectionInfo.FromEpsgCode(31466);

wgs84toGoogle = new CoordinateTransformation()

{

Target = KnownCoordinateSystems.Geographic.World.WGS1984,

Source = piSource

};

#else

CoordinateSystemFactory csFac = new ProjNet.CoordinateSystems.CoordinateSystemFactory();

CoordinateTransformationFactory ctFac = new CoordinateTransformationFactory();

IGeographicCoordinateSystem wgs84 = csFac.CreateGeographicCoordinateSystem(

"WGS 84", AngularUnit.Degrees, HorizontalDatum.WGS84, PrimeMeridian.Greenwich,

new AxisInfo("north", AxisOrientationEnum.North), new AxisInfo("east", AxisOrientationEnum.East));

List<ProjectionParameter> parameters = new List<ProjectionParameter>();

parameters.Add(new ProjectionParameter("semi_major", 6378137.0));

parameters.Add(new ProjectionParameter("semi_minor", 6378137.0));

parameters.Add(new ProjectionParameter("latitude_of_origin", 0.0));

parameters.Add(new ProjectionParameter("central_meridian", 0.0));

parameters.Add(new ProjectionParameter("scale_factor", 1.0));

parameters.Add(new ProjectionParameter("false_easting", 0.0));

parameters.Add(new ProjectionParameter("false_northing", 0.0));

IProjection projection = csFac.CreateProjection("Google Mercator", "mercator_1sp", parameters);

IProjectedCoordinateSystem epsg900913 = csFac.CreateProjectedCoordinateSystem(

"Google Mercator", wgs84, projection, LinearUnit.Metre, new AxisInfo("East", AxisOrientationEnum.East),

new AxisInfo("North", AxisOrientationEnum.North));

dhdn2towgs84 = ctFac.CreateFromCoordinateSystems(wgs84, epsg900913);

#endif

}

return dhdn2towgs84;

}

}

public static ICoordinateTransformation GoogleMercatorToWgs84

{

get

{

if (dhdn2towgs84 == null)

{

#if DotSpatialProjections

googletowgs84 = new CoordinateTransformation()

{

Source = KnownCoordinateSystems.Projected.World.WebMercator,

Target = KnownCoordinateSystems.Geographic.World.WGS1984

};

#else

CoordinateSystemFactory csFac = new ProjNet.CoordinateSystems.CoordinateSystemFactory();

CoordinateTransformationFactory ctFac = new CoordinateTransformationFactory();

IGeographicCoordinateSystem wgs84 = csFac.CreateGeographicCoordinateSystem(

"WGS 84", AngularUnit.Degrees, HorizontalDatum.WGS84, PrimeMeridian.Greenwich,

new AxisInfo("north", AxisOrientationEnum.North), new AxisInfo("east", AxisOrientationEnum.East));

List<ProjectionParameter> parameters = new List<ProjectionParameter>();

parameters.Add(new ProjectionParameter("semi_major", 6378137.0));

parameters.Add(new ProjectionParameter("semi_minor", 6378137.0));

parameters.Add(new ProjectionParameter("latitude_of_origin", 0.0));

parameters.Add(new ProjectionParameter("central_meridian", 0.0));

parameters.Add(new ProjectionParameter("scale_factor", 1.0));

parameters.Add(new ProjectionParameter("false_easting", 0.0));

parameters.Add(new ProjectionParameter("false_northing", 0.0));

IProjection projection = csFac.CreateProjection("Google Mercator", "mercator_1sp", parameters);

IProjectedCoordinateSystem epsg900913 = csFac.CreateProjectedCoordinateSystem(

"Google Mercator", wgs84, projection, LinearUnit.Metre, new AxisInfo("East", AxisOrientationEnum.East),

new AxisInfo("North", AxisOrientationEnum.North));

googletowgs84 = ctFac.CreateFromCoordinateSystems(epsg900913, wgs84);

#endif

}

return googletowgs84;

}

}

public static LabelLayer CreateLabelLayer(VectorLayer originalLayer, string labelColumnName)

{

SharpMap.Layers.LabelLayer labelLayer = new SharpMap.Layers.LabelLayer(originalLayer.LayerName + ":Labels");

labelLayer.DataSource = originalLayer.DataSource;

labelLayer.LabelColumn = labelColumnName;

labelLayer.Style.CollisionDetection = true;

labelLayer.Style.CollisionBuffer = new SizeF(10F, 10F);

labelLayer.LabelFilter = SharpMap.Rendering.LabelCollisionDetection.ThoroughCollisionDetection;

labelLayer.Style.Offset = new PointF(0, -5F);

labelLayer.MultipartGeometryBehaviour = SharpMap.Layers.LabelLayer.MultipartGeometryBehaviourEnum.CommonCenter;

labelLayer.Style.Font = new Font(FontFamily.GenericSansSerif, 12);

labelLayer.MaxVisible = originalLayer.MaxVisible;

labelLayer.MinVisible = originalLayer.MinVisible;

labelLayer.Style.Halo = new Pen(Color.White, 2);

labelLayer.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;

labelLayer.CoordinateTransformation = originalLayer.CoordinateTransformation;

return labelLayer;

}

private static readonly Random Rnd = new Random();

public static Color GetRandomColor()

{

return Color.FromArgb(Rnd.Next(0, 127), Rnd.Next(0, 255), Rnd.Next(0,255), Rnd.Next(0,255));

}

public static Boolean GetRandomBoolean()

{

return Rnd.Next(0, 2) == 1;

}

public static Brush GetRandomBrush()

{

return new SolidBrush(GetRandomColor());

}

public static Pen GetRandomPen()

{

return GetRandomPen(1, 4);

}

/// <summary>

/// Generates a random symbol.

/// </summary>

/// <returns></returns>

public static Bitmap GetRandomSymbol()

{

var s = Rnd.Next(4, 12);

var f = new Font("WingDings", 2*s, GraphicsUnit.Pixel);

var bmp = new Bitmap(2*s + 2, 2*s + 2, PixelFormat.Format32bppArgb);

using (var g = Graphics.FromImage(bmp))

{

g.Clear(Color.Transparent);

g.DrawString(new string(Convert.ToChar((byte) Rnd.Next(15, 127)), 1), f, GetRandomBrush(), new PointF(s, s) ,

new StringFormat

{Alignment = StringAlignment.Center, LineAlignment = StringAlignment.Center});

}

return bmp;

}

public static SharpMap.Styles.VectorStyle GetRandomVectorStyle()

{

return new SharpMap.Styles.VectorStyle

{

EnableOutline = GetRandomBoolean(),

Outline = GetRandomPen(3, 7),

Line = GetRandomPen(1, 4),

Fill = GetRandomBrush(),

Symbol = GetRandomSymbol(),

//SymbolRotation = Rnd.Next(0, 359),

};

}

private static Pen GetRandomPen(int min, int max)

{

var p = new Pen(GetRandomColor(), Rnd.Next(min, max));

p.LineJoin = LineJoin.MiterClipped;

p.MiterLimit = 2f;

return p;

}

public static SharpMap.Map GetMapForProviders(IEnumerable<SharpMap.Data.Providers.IProvider> providers)

{

var m = new SharpMap.Map();

foreach (var provider in providers)

{

var l = new VectorLayer(provider.ConnectionID, provider)

{

Style = GetRandomVectorStyle()

};

m.Layers.Add(l);

var ll = new LabelLayer("Label " + provider.ConnectionID);

ll.DataSource = provider;

provider.Open();

var f = provider.GetFeatureByOid(1);

provider.Close();

ll.LabelColumn = f.Factory.AttributesDefinition[1].AttributeName;

ll.Style.CollisionDetection = false;

ll.Style.IgnoreLength = true;

m.Layers.Add(ll);

}

m.ZoomToExtents();

return m;

}

}

}