/// <summary>
/// Returns the style based on a feature
/// </summary>
/// <param name="feature">Set of attribute values to calculate the <see cref="SharpMap.Styles.IStyle"/> from</param>
/// <returns>The style</returns>
public SharpMap.Styles.IStyle GetStyle(GeoAPI.Features.IFeature feature)
{
var res = _style;
var cls = new SharpMap.Rendering.Symbolizer.CachedLineSymbolizer();
cls.LineSymbolizeHandlers.Add(new SharpMap.Rendering.Symbolizer.PlainLineSymbolizeHandler {
Line = new System.Drawing.Pen(System.Drawing.Color.Gold, 2)
});
var wls = new SharpMap.Rendering.Symbolizer.WarpedLineSymbolizeHander
{
Pattern =
SharpMap.Rendering.Symbolizer.WarpedLineSymbolizer.
GetGreaterSeries(3, 3),
Line = new System.Drawing.Pen(System.Drawing.Color.Firebrick, 1)
,
Interval = 20
};
cls.LineSymbolizeHandlers.Add(wls);
cls.ImmediateMode = true;
res.LineSymbolizer = cls;
return(res);
}
public SharpMap.Styles.IStyle GetStyle(GeoAPI.Features.IFeature fdr)
{
var retval = new SharpMap.Styles.VectorStyle();
if (fdr.Attributes["Bearing"] == DBNull.Value)
{
var bmp = new System.Drawing.Bitmap(36, 36);
using (var g = System.Drawing.Graphics.FromImage(bmp))
{
g.Clear(System.Drawing.Color.Wheat);
g.FillEllipse(System.Drawing.Brushes.Green, 0, 0, 36, 36);
g.DrawEllipse(new System.Drawing.Pen(System.Drawing.Brushes.Yellow, 3), 4, 4, 28, 28);
g.DrawString("H", new System.Drawing.Font("Arial", 18, System.Drawing.FontStyle.Bold),
System.Drawing.Brushes.Yellow,
new System.Drawing.RectangleF(2, 2, 34, 34),
new System.Drawing.StringFormat
{
Alignment = System.Drawing.StringAlignment.Center,
LineAlignment = System.Drawing.StringAlignment.Center
});
}
bmp.MakeTransparent(System.Drawing.Color.Wheat);
retval.Symbol = bmp;
}
else
{
retval.Symbol = ColoredArrow(_brush);
var rot = Convert.ToSingle(fdr.Attributes["Bearing"]);
retval.SymbolRotation = rot % 360f;
}
return(retval);
}
/// <summary>
/// Method for creating pie chart symbols
/// </summary>
/// <remarks>
/// <para>In this example we just create some random pie charts,
/// but it probably should be based on attributes read from the row.</para>
/// <para>Credits goes to gonzalo_ar for posting this in the forum</para></remarks>
/// <param name="row"></param>
/// <returns></returns>
private static Bitmap GetPieChart(GeoAPI.Features.IFeature row)
{
// Replace polygon with a center point (this is where we place the symbol
row.Geometry = row.Geometry.Centroid;
// Just for the example I use random values
int size = rand.Next(20, 35);
int angle1 = rand.Next(60, 180);
int angle2 = rand.Next(angle1 + 60, 300);
RectangleF rect = new RectangleF(0, 0, size, size);
Bitmap b = new Bitmap(size, size);
using (IGraphics g = Graphics.FromImage(b).G())
{
// Draw Pie
g.FillPie(Brushes.LightGreen, rect, 0, angle1);
g.FillPie(Brushes.Pink, rect, angle1, angle2 - angle1);
g.FillPie(Brushes.PeachPuff, rect, angle2, 360 - angle2);
// Draw Borders
g.DrawPie(Pens.Green, rect, 0, angle1);
g.DrawPie(Pens.Red, rect, angle1, angle2 - angle1);
g.DrawPie(Pens.Orange, rect, angle2, 360 - angle2);
}
return(b);
}
internal static int GetRiverLength(GeoAPI.Features.IFeature row)
{
if (row == null)
{
return(0);
}
if (row.Geometry == null)
{
return(0);
}
var ml = row.Geometry as GeoAPI.Geometries.IMultiLineString;
if (ml != null)
{
return(System.Convert.ToInt32(ml.Length));
}
var l = row.Geometry as GeoAPI.Geometries.ILineString;
if (l != null)
{
return(System.Convert.ToInt32(l.Length));
}
return(0);
}
/// <summary>
/// This method is used for determining the style
/// It is used as a delegate for the CustomTheme class.
/// </summary>
/// <param name="row"></param>
/// <returns></returns>
private VectorStyle GetCountryStyle(GeoAPI.Features.IFeature row)
{
VectorStyle s = new VectorStyle();
s.Fill = new SolidBrush(Color.Green);
s.Symbol = GetPieChart(row);
return(s);
}
public void Test11GetFeature()
{
using (var provider = GetProvider())
{
GeoAPI.Features.IFeature feature = null;
NUnit.Framework.Assert.DoesNotThrow(() => feature = provider.GetFeatureByOid(5));
NUnit.Framework.Assert.NotNull(feature);
NUnit.Framework.Assert.AreEqual(5, feature.Attributes[provider.ObjectIdColumn]);
}
}
public static bool JustTracks(GeoAPI.Features.IFeature fdr)
{
//System.Console.WriteLine(fdr [0] + ";"+ fdr[4]);
var s = fdr.Attributes[4] as string;
if (s != null)
{
return(s == "track");
}
return(true);
}
public void TestGetFeature()
{
using (var p = CreateProvider())
{
GeoAPI.Features.IFeature feature = null;
Assert.DoesNotThrow(() => feature = p.GetFeatureByOid(3));
Assert.IsNotNull(feature);
Assert.AreEqual(3, (int)feature.Attributes[p.ObjectIdColumn]);
Assert.AreEqual(feature.Geometry.Centroid.Coordinate,
new Coordinate(429003.31, 360425.45));
}
}
public SharpMap.Styles.VectorStyle GetRotatedSymol(GeoAPI.Features.IFeature row)
{
if (!System.String.IsNullOrEmpty(StyleRotationColumn))
{
try
{
SharpMap.Styles.VectorStyle dataStyle = CloneStyle(DefaultStyle);
dataStyle.SymbolRotation = System.Convert.ToSingle(row.Attributes[StyleRotationColumn]);
return(dataStyle);
}
catch { }
}
return(null);
}
public SharpMap.Styles.VectorStyle GetRotatedSymol(GeoAPI.Features.IFeature row)
{
if (!System.String.IsNullOrEmpty(SymbolColumn))
{
try
{
SharpMap.Styles.VectorStyle dataStyle = CloneStyle(DefaultStyle);
if (!row.IsNull(SymbolColumn))
{
dataStyle.Symbol = new System.Drawing.Bitmap(
new System.IO.MemoryStream((byte[])row.Attributes[SymbolColumn]));
}
return(dataStyle);
}
catch { }
}
return(null);
}
