public void setPlacesLayer()
{
_sharpMap.Layers.Remove(placesLayer);
var queryic = " type in (";
for (int i = 0; i < ZoomRegulator.zoomRegulator.zoom_level + 1; ++i)
{
queryic += "'" + placesTypes[i] + "', ";
}
queryic = queryic.Remove(queryic.Count() - 2, 2) + ")";
var provajder = new SharpMap.Data.Providers.PostGIS(connString, "places", geomname, idname);
provajder.DefinitionQuery = queryic;
placesLayer.DataSource = provajder;
placesLayer.LabelColumn = "name";
SharpMap.Styles.LabelStyle min = new SharpMap.Styles.LabelStyle();
SharpMap.Styles.LabelStyle max = new SharpMap.Styles.LabelStyle();
min.CollisionDetection = true;
max.CollisionDetection = true;
min.CollisionBuffer = new SizeF(25, 25);
max.CollisionBuffer = new SizeF(25, 25);
min.Font = new Font(FontFamily.Families.Where(x => x.Name == "Arial").FirstOrDefault(), 14 - ZoomRegulator.zoomRegulator.zoom_level * 0.7f, FontStyle.Italic);
max.Font = new Font(FontFamily.Families.Where(x => x.Name == "Arial").FirstOrDefault(), 14 - ZoomRegulator.zoomRegulator.zoom_level * 0.7f, FontStyle.Italic);
min.ForeColor = Color.DarkGray;
max.ForeColor = Color.Black;
placesLayer.Theme = new SharpMap.Rendering.Thematics.GradientTheme("population", 0, 202250, min, max);
_sharpMap.Layers.Add(placesLayer);
}
/// <summary>
/// Creates a new instance of a LabelLayer
/// </summary>
public LabelLayer(string layername)
{
_Style = new SharpMap.Styles.LabelStyle();
this.LayerName = layername;
this.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;
this.TextRenderingHint = System.Drawing.Text.TextRenderingHint.AntiAlias;
_MultipartGeometryBehaviour = MultipartGeometryBehaviourEnum.All;
_LabelFilter = SharpMap.Rendering.LabelCollisionDetection.SimpleCollisionDetection;
}
/// <summary>
/// Initializes a new Label instance
/// </summary>
/// <param name="text">Text to write</param>
/// <param name="labelpoint">Position of label</param>
/// <param name="rotation">Rotation</param>
/// <param name="priority">Label priority used for collision detection</param>
/// <param name="collisionbox">Box around label for collision detection</param>
/// <param name="style">The style of the label</param>
public Label(string text, System.Drawing.PointF labelpoint, float rotation, int priority, LabelBox collisionbox, SharpMap.Styles.LabelStyle style)
{
_Text = text;
_LabelPoint = labelpoint;
_Rotation = rotation;
_Priority = priority;
_box = collisionbox;
_Style = style;
}
/// <summary>
/// Creates a new instance of a LabelLayer
/// </summary>
public LabelLayer(string layername)
{
_Style = new SharpMap.Styles.LabelStyle();
this.LayerName = layername;
this.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;
this.TextRenderingHint = System.Drawing.Text.TextRenderingHint.AntiAlias;
_MultipartGeometryBehaviour = MultipartGeometryBehaviourEnum.All;
_LabelFilter = SharpMap.Rendering.LabelCollisionDetection.SimpleCollisionDetection;
}
private SharpMap.Styles.LabelStyle GetStyleForStateLabel(SharpMap.Data.FeatureDataRow row)
{
SharpMap.Styles.LabelStyle style = new SharpMap.Styles.LabelStyle()
{
ForeColor = fontStateColor
};
if (row.ItemArray[3].Equals("HI"))
{
style.ForeColor = Color.Black;
}
style.Font = fontStateLabels;
style.CollisionDetection = true;
style.CollisionBuffer = new SizeF(50, 50);
style.HorizontalAlignment = SharpMap.Styles.LabelStyle.HorizontalAlignmentEnum.Center;
style.Enabled = false;
return(style);
}
private SharpMap.Rendering.Label CreateLabel(SharpMap.Geometries.Geometry feature, string text, float rotation, SharpMap.Styles.LabelStyle style, Map map, System.Drawing.Graphics g)
{
System.Drawing.SizeF size = g.MeasureString(text, style.Font);
System.Drawing.PointF position = map.WorldToImage(feature.GetBoundingBox().GetCentroid());
position.X = position.X - size.Width * (short)style.HorizontalAlignment * 0.5f;
position.Y = position.Y - size.Height * (short)style.VerticalAlignment * 0.5f;
if (position.X - size.Width > map.Size.Width || position.X + size.Width < 0 ||
position.Y - size.Height > map.Size.Height || position.Y + size.Height < 0)
{
return(null);
}
else
{
SharpMap.Rendering.Label lbl;
if (!style.CollisionDetection)
{
lbl = new SharpMap.Rendering.Label(text, position, rotation, this.Priority, null, style);
}
else
{
//Collision detection is enabled so we need to measure the size of the string
lbl = new SharpMap.Rendering.Label(text, position, rotation, this.Priority,
new SharpMap.Rendering.LabelBox(position.X - size.Width * 0.5f - style.CollisionBuffer.Width, position.Y + size.Height * 0.5f + style.CollisionBuffer.Height,
size.Width + 2f * style.CollisionBuffer.Width, size.Height + style.CollisionBuffer.Height * 2f), style);
}
if (feature.GetType() == typeof(SharpMap.Geometries.LineString))
{
SharpMap.Geometries.LineString line = feature as SharpMap.Geometries.LineString;
if (line.Length / map.PixelSize > size.Width) //Only label feature if it is long enough
{
CalculateLabelOnLinestring(line, ref lbl, map);
}
else
{
return(null);
}
}
return(lbl);
}
}
/// <summary>
/// Renders the layer
/// </summary>
/// <param name="g">Graphics object reference</param>
/// <param name="map">Map which is rendered</param>
public override void Render(System.Drawing.Graphics g, Map map)
{
if (this.Style.Enabled && this.Style.MaxVisible >= map.Zoom && this.Style.MinVisible < map.Zoom)
{
if (this.DataSource == null)
{
throw (new ApplicationException("DataSource property not set on layer '" + this.LayerName + "'"));
}
g.TextRenderingHint = this.TextRenderingHint;
g.SmoothingMode = this.SmoothingMode;
SharpMap.Geometries.BoundingBox envelope = map.Envelope; //View to render
if (this.CoordinateTransformation != null)
{
envelope = SharpMap.CoordinateSystems.Transformations.GeometryTransform.TransformBox(envelope, this.CoordinateTransformation.MathTransform.Inverse());
}
SharpMap.Data.FeatureDataSet ds = new SharpMap.Data.FeatureDataSet();
this.DataSource.Open();
this.DataSource.ExecuteIntersectionQuery(envelope, ds);
this.DataSource.Close();
if (ds.Tables.Count == 0)
{
base.Render(g, map);
return;
}
SharpMap.Data.FeatureDataTable features = (SharpMap.Data.FeatureDataTable)ds.Tables[0];
//Initialize label collection
List <Rendering.Label> labels = new List <SharpMap.Rendering.Label>();
//List<System.Drawing.Rectangle> LabelBoxes; //Used for collision detection
//Render labels
for (int i = 0; i < features.Count; i++)
{
SharpMap.Data.FeatureDataRow feature = features[i];
if (this.CoordinateTransformation != null)
{
features[i].Geometry = SharpMap.CoordinateSystems.Transformations.GeometryTransform.TransformGeometry(features[i].Geometry, this.CoordinateTransformation.MathTransform);
}
SharpMap.Styles.LabelStyle style = null;
if (this.Theme != null) //If thematics is enabled, lets override the style
{
style = this.Theme.GetStyle(feature) as SharpMap.Styles.LabelStyle;
}
else
{
style = this.Style;
}
float rotation = 0;
if (!String.IsNullOrEmpty(this.RotationColumn))
{
float.TryParse(feature[this.RotationColumn].ToString(), System.Globalization.NumberStyles.Any, SharpMap.Map.numberFormat_EnUS, out rotation);
}
string text;
if (_getLabelMethod != null)
{
text = _getLabelMethod(feature);
}
else
{
if (feature.Table.Columns.Contains(this.LabelColumn))
{
text = feature[this.LabelColumn].ToString();
}
else
{
text = "";
}
}
if (text != null && text != String.Empty)
{
if (feature.Geometry is SharpMap.Geometries.GeometryCollection)
{
if (this.MultipartGeometryBehaviour == MultipartGeometryBehaviourEnum.All)
{
foreach (SharpMap.Geometries.Geometry geom in (feature.Geometry as Geometries.GeometryCollection))
{
SharpMap.Rendering.Label lbl = CreateLabel(geom, text, rotation, style, map, g);
if (lbl != null)
{
labels.Add(lbl);
}
}
}
else if (this.MultipartGeometryBehaviour == MultipartGeometryBehaviourEnum.CommonCenter)
{
SharpMap.Rendering.Label lbl = CreateLabel(feature.Geometry, text, rotation, style, map, g);
if (lbl != null)
{
labels.Add(lbl);
}
}
else if (this.MultipartGeometryBehaviour == MultipartGeometryBehaviourEnum.First)
{
if ((feature.Geometry as Geometries.GeometryCollection).Collection.Count > 0)
{
SharpMap.Rendering.Label lbl = CreateLabel((feature.Geometry as Geometries.GeometryCollection).Collection[0], text, rotation, style, map, g);
if (lbl != null)
{
labels.Add(lbl);
}
}
}
else if (this.MultipartGeometryBehaviour == MultipartGeometryBehaviourEnum.Largest)
{
Geometries.GeometryCollection coll = (feature.Geometry as Geometries.GeometryCollection);
if (coll.NumGeometries > 0)
{
double largestVal = 0;
int idxOfLargest = 0;
for (int j = 0; j < coll.NumGeometries; j++)
{
SharpMap.Geometries.Geometry geom = coll.Geometry(j);
if (geom is Geometries.LineString && ((Geometries.LineString)geom).Length > largestVal)
{
largestVal = ((Geometries.LineString)geom).Length;
idxOfLargest = j;
}
if (geom is Geometries.MultiLineString && ((Geometries.MultiLineString)geom).Length > largestVal)
{
largestVal = ((Geometries.LineString)geom).Length;
idxOfLargest = j;
}
if (geom is Geometries.Polygon && ((Geometries.Polygon)geom).Area > largestVal)
{
largestVal = ((Geometries.Polygon)geom).Area;
idxOfLargest = j;
}
if (geom is Geometries.MultiPolygon && ((Geometries.MultiPolygon)geom).Area > largestVal)
{
largestVal = ((Geometries.MultiPolygon)geom).Area;
idxOfLargest = j;
}
}
SharpMap.Rendering.Label lbl = CreateLabel(coll.Geometry(idxOfLargest), text, rotation, style, map, g);
if (lbl != null)
{
labels.Add(lbl);
}
}
}
}
else
{
SharpMap.Rendering.Label lbl = CreateLabel(feature.Geometry, text, rotation, style, map, g);
if (lbl != null)
{
labels.Add(lbl);
}
}
}
}
if (labels.Count > 0) //We have labels to render...
{
if (this.Style.CollisionDetection && this._LabelFilter != null)
{
this._LabelFilter(labels);
}
for (int i = 0; i < labels.Count; i++)
{
SharpMap.Rendering.VectorRenderer.DrawLabel(g, labels[i].LabelPoint, labels[i].Style.Offset, labels[i].Style.Font, labels[i].Style.ForeColor, labels[i].Style.BackColor, Style.Halo, labels[i].Rotation, labels[i].Text, map);
}
}
labels = null;
}
base.Render(g, map);
}
/// <summary>
/// Initializes a new Label instance
/// </summary>
/// <param name="text">Text to write</param>
/// <param name="labelPoint">Position of label</param>
/// <param name="rotation">Rotation</param>
/// <param name="priority">Label priority used for collision detection</param>
/// <param name="collisionbox">Box around label for collision detection</param>
/// <param name="style">The style of the label</param>
public Label(string text, System.Drawing.PointF labelPoint, float rotation, int priority, LabelBox collisionbox, SharpMap.Styles.LabelStyle style)
{
this.text = text;
this.labelPoint = labelPoint;
this.rotation = rotation;
this.priority = priority;
box = collisionbox;
this.style = style;
}
