using System;

using System.Drawing;

using GeoAPI.Geometries;

using NUnit.Framework;

namespace ExampleCodeSnippets

{

using cd = CreatingData;

[NUnit.Framework.TestFixture]

public class EnsureVisibleSample

{

public static void EnsureVisible(SharpMap.Map map, GeoAPI.Geometries.Coordinate pt)

{

const double ensureVisibleRatio = 0.1d;

//Get current map envelope

var bb = map.Envelope;

System.Console.WriteLine(string.Format("Map envelope: {0}", bb));

//Set valid envelope

var evbb = bb.Grow(- ensureVisibleRatio * bb.Width, -ensureVisibleRatio * bb.Height );

System.Console.WriteLine(string.Format("Valid envelope: {0}", evbb));

//Test if Point is in valid envelope

if (evbb.Contains(pt)) return;

//It is not

System.Console.WriteLine(string.Format("Valid envelope does not contain {0}", pt));

//LineString from Map.Center -> to Point

var ls = map.Factory.CreateLineString(new[] {evbb.Centre, pt});

System.Console.WriteLine(string.Format("LineString Map.Center -> Point: {0}", ls));

//Setup Linestring from BoundingBox

var evbbpts = new [] {evbb.TopLeft(), evbb.TopRight(), evbb.BottomRight(), evbb.BottomLeft(), evbb.TopLeft() };

var evbblinearring = map.Factory.CreateLineString(evbbpts);

System.Console.WriteLine(string.Format("Linestring of valid envelope: {0}", evbblinearring));

//// convert geometries to NTS

//var ntsevbb = (NetTopologySuite.Geometries.LineString)

// SharpMap.Converters.NTS.GeometryConverter.ToNTSGeometry(evbblinearring, gf);

//var ntsls = (NetTopologySuite.Geometries.LineString)

// SharpMap.Converters.NTS.GeometryConverter.ToNTSGeometry(ls, gf);

// Get intersection point

var intGeo = evbblinearring.Intersection(ls);

var intPt = (NetTopologySuite.Geometries.Point)intGeo;

System.Console.WriteLine(string.Format("Intersection point is: {0}", intPt));

//Compute offset

var dx = pt.X - intPt.X;

var dy = pt.Y - intPt.Y;

System.Console.WriteLine(string.Format("Map.Center needs to be shifted by: [{0}, {1}]", dx, dy));

//Set new center Center

map.Center = new GeoAPI.Geometries.Coordinate(map.Center.X + dx, map.Center.Y + dy);

}

[NUnit.Framework.Test]

public void TestEnsureVisible()

{

//Create a map

SharpMap.Map map = new SharpMap.Map(new System.Drawing.Size(720,360));

//Create some random sample data

SharpMap.Data.FeatureDataTable fdt =

cd.CreatePointFeatureDataTableFromArrays(cd.GetRandomOrdinates(80, -180, 180),

cd.GetRandomOrdinates(80, -90, 90), null);

//Create layer and datasource

SharpMap.Layers.VectorLayer vl = new SharpMap.Layers.VectorLayer("Points", new SharpMap.Data.Providers.GeometryFeatureProvider(fdt));

//Create default style

SharpMap.Styles.VectorStyle defaultStyle = new SharpMap.Styles.VectorStyle();

defaultStyle.Symbol = new System.Drawing.Bitmap(@"..\..\..\DemoWinForm\Resources\flag.png");

defaultStyle.SymbolScale = 0.5f;

//Create theming class and apply to layer

var srt = new SymbolRotationTheming("Rotation", defaultStyle);

vl.Theme = new SharpMap.Rendering.Thematics.CustomTheme(srt.GetRotatedSymol);

map.Layers.Add(vl);

map.ZoomToExtents();

map.Zoom = 60; //2*30

map.Center = new GeoAPI.Geometries.Coordinate(0,0);

System.Console.WriteLine(map.Center);

EnsureVisible(map, new GeoAPI.Geometries.Coordinate(-30, 0));

System.Console.WriteLine(map.Center);

System.Console.WriteLine();

EnsureVisible(map, new GeoAPI.Geometries.Coordinate(15, 20));

System.Console.WriteLine(map.Center);

System.Console.WriteLine();

EnsureVisible(map, new GeoAPI.Geometries.Coordinate(15, -20));

System.Console.WriteLine(map.Center);

}

[Test, Ignore("Utility, not a test")]

public void CreateKnownColors()

{

Console.WriteLine("/// <summary>");

Console.WriteLine("/// Attribute class to associate ARGB value with <see cref=\"KnownColor\" enum member");

Console.WriteLine("/// </summary>");

Console.WriteLine("[System.AttributeUsage(System.AttributeTargets.Field)]");

Console.WriteLine("internal class ArgbValueAttribute : System.Attribute\n{");

Console.WriteLine(" /// <summary>");

Console.WriteLine(" /// Creates an instance of this class");

Console.WriteLine(" /// </summary>");

Console.WriteLine(" /// <param name=\"argb\">The ARGB value</param>");

Console.WriteLine(" public ArgbValueAttribute(int argb)\n {");

Console.WriteLine(" Argb = argb;\n }");

Console.WriteLine(" /// <summary>");

Console.WriteLine(" /// Gets a value indicating the ARGB value");

Console.WriteLine(" /// </summary>");

Console.WriteLine(" public int Argb { get; }");

Console.WriteLine("}");

Console.WriteLine("/// <summary>");

Console.WriteLine("/// Straight copy of <see cref=\"System.Drawing.KnownColor\"/> names");

Console.WriteLine("/// </summary>");

Console.WriteLine("internal enum KnownColor\n{");

foreach (System.Drawing.KnownColor knownColor in System.Enum.GetValues(typeof(System.Drawing.KnownColor)))

{

string knownColorName = Enum.GetName(typeof(System.Drawing.KnownColor), knownColor);

Console.WriteLine("\t/// <summary>");

Console.WriteLine("\t/// Color {0} (#{1:X})", knownColorName, 0x00FFFFFF & Color.FromKnownColor(knownColor).ToArgb());

Console.WriteLine("\t/// </summary>");

Console.WriteLine("\t[ArgbValue({0})]", Color.FromKnownColor(knownColor).ToArgb());

Console.WriteLine("\t{0} = {1},", knownColorName, (int)knownColor);

}

Console.WriteLine("}");

}

}

}