private void RenderFeature(IViewport viewport, IStyle style, IFeature feature)
{
var vectorStyle = style as VectorStyle;
if (feature.Geometry is Point)
{
GdiGeometryRenderer.DrawPoint(Graphics, (Point)feature.Geometry, vectorStyle, viewport);
}
else if (feature.Geometry is MultiPoint)
{
GdiGeometryRenderer.DrawMultiPoint(Graphics, (MultiPoint)feature.Geometry, vectorStyle, viewport);
}
else if (feature.Geometry is LineString)
{
GdiGeometryRenderer.DrawLineString(Graphics, (LineString)feature.Geometry, vectorStyle.Line.ToBitmap(), viewport);
}
else if (feature.Geometry is MultiLineString)
{
GdiGeometryRenderer.DrawMultiLineString(Graphics, (MultiLineString)feature.Geometry, vectorStyle.Line.ToBitmap(), viewport);
}
else if (feature.Geometry is Polygon)
{
GdiGeometryRenderer.DrawPolygon(Graphics, (Polygon)feature.Geometry, vectorStyle.Fill.ToBitmap(), vectorStyle.Outline.ToBitmap(), viewport);
}
else if (feature.Geometry is MultiPolygon)
{
GdiGeometryRenderer.DrawMultiPolygon(Graphics, (MultiPolygon)feature.Geometry, vectorStyle.Fill.ToBitmap(), vectorStyle.Outline.ToBitmap(), viewport);
}
else if (feature.Geometry is IRaster)
{
GdiGeometryRenderer.DrawRaster(Graphics, feature.Geometry, vectorStyle, viewport);
}
}
private static void RenderGeometry(Graphics graphics, IViewport viewport, IFeature feature, VectorStyle style)
{
if (feature.Geometry is Point)
{
GdiGeometryRenderer.DrawPoint(graphics, (Point)feature.Geometry, style, viewport);
}
else if (feature.Geometry is MultiPoint)
{
GdiGeometryRenderer.DrawMultiPoint(graphics, (MultiPoint)feature.Geometry, style, viewport);
}
else if (feature.Geometry is LineString)
{
GdiGeometryRenderer.DrawLineString(graphics, (LineString)feature.Geometry, style.Line.ToBitmap(), viewport);
}
else if (feature.Geometry is MultiLineString)
{
GdiGeometryRenderer.DrawMultiLineString(graphics, (MultiLineString)feature.Geometry, style.Line.ToBitmap(), viewport);
}
else if (feature.Geometry is Polygon)
{
GdiGeometryRenderer.DrawPolygon(graphics, (Polygon)feature.Geometry, style.Fill.ToBitmap(), style.Outline.ToBitmap(), viewport);
}
else if (feature.Geometry is MultiPolygon)
{
GdiGeometryRenderer.DrawMultiPolygon(graphics, (MultiPolygon)feature.Geometry, style.Fill.ToBitmap(), style.Outline.ToBitmap(), viewport);
}
else if (feature.Geometry is IRaster)
{
GdiGeometryRenderer.DrawRaster(graphics, feature.Geometry, style, viewport);
}
}
private static void RenderLayer(Graphics graphics, IViewport viewport, ILayer layer)
{
graphics.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;
var layerStyles = BaseLayer.GetLayerStyles(layer);
foreach (var layerStyle in layerStyles)
{
var style = layerStyle;
var features = layer.GetFeaturesInView(viewport.Extent, viewport.Resolution);
//Linestring outlines is drawn by drawing the layer once with a thicker line
//before drawing the "inline" on top.
var enumerable = features as IList <IFeature> ?? features.ToList();
foreach (var feature in enumerable)
{
if (layerStyle is IThemeStyle)
{
style = (layerStyle as IThemeStyle).GetStyle(feature);
}
if ((style is VectorStyle) && ((style as VectorStyle).Outline != null))
{
GdiGeometryRenderer.RenderGeometryOutline(graphics, viewport, feature.Geometry, style as VectorStyle);
}
}
foreach (var feature in enumerable)
{
if (layerStyle is IThemeStyle)
{
style = (layerStyle as IThemeStyle).GetStyle(feature);
}
RenderGeometry(graphics, viewport, feature, style as VectorStyle);
}
}
}
public static void Render(Graphics g, IViewport viewport, LabelLayer labelLayer)
{
var layerStyles = BaseLayer.GetLayerStyles(labelLayer);
foreach (var layerStyle in layerStyles)
{
if (layerStyle.Enabled && labelLayer.MaxVisible >= viewport.Resolution && labelLayer.MinVisible < viewport.Resolution)
{
if (labelLayer.DataSource == null)
{
throw (new ApplicationException("DataSource property not set"));
}
g.SmoothingMode = SmoothingMode.AntiAlias;
var features = labelLayer.GetFeaturesInView(viewport.Extent, viewport.Resolution);
//Initialize label collection
var labels = new List <Label>();
var style = layerStyle as LabelStyle;
//List<System.Drawing.Rectangle> LabelBoxes; //Used for collision detection
//Render labels
foreach (IFeature feature in features)
{
if (layerStyle is IThemeStyle)
{
style = (layerStyle as IThemeStyle).GetStyle(feature) as LabelStyle;
}
float rotation = 0;
if (!String.IsNullOrEmpty(labelLayer.RotationColumn))
{
rotation = float.Parse(feature[labelLayer.RotationColumn].ToString(), NumberStyles.Any, CultureInfo.InvariantCulture);
}
int priority = labelLayer.Priority;
if (labelLayer.PriorityDelegate != null)
{
priority = labelLayer.PriorityDelegate(feature);
}
else if (!String.IsNullOrEmpty(labelLayer.PriorityColumn))
{
priority = int.Parse(feature[labelLayer.PriorityColumn].ToString(), NumberStyles.Any, CultureInfo.InvariantCulture);
}
string text;
if (labelLayer.LabelStringDelegate != null)
{
text = labelLayer.LabelStringDelegate(feature);
}
else
{
text = feature[labelLayer.LabelColumn].ToString();
}
if (!string.IsNullOrEmpty(text))
{
if (feature.Geometry is GeometryCollection)
{
var geometryCollection = feature.Geometry as GeometryCollection;
if (labelLayer.MultipartGeometryBehaviour == LabelLayer.MultipartGeometryBehaviourEnum.All)
{
foreach (var geometry in geometryCollection)
{
var label = CreateLabel(geometry, text, rotation, priority, style, viewport, g);
if (label != null)
{
labels.Add(label);
}
}
}
else if (labelLayer.MultipartGeometryBehaviour == LabelLayer.MultipartGeometryBehaviourEnum.CommonCenter)
{
var label = CreateLabel(feature.Geometry, text, rotation, priority, style, viewport, g);
if (label != null)
{
labels.Add(label);
}
}
else if (labelLayer.MultipartGeometryBehaviour == LabelLayer.MultipartGeometryBehaviourEnum.First)
{
if ((feature.Geometry as GeometryCollection).Collection.Count > 0)
{
Label label = CreateLabel(geometryCollection.Collection[0], text, rotation, 0,
style, viewport, g);
if (label != null)
{
labels.Add(label);
}
}
}
else if (labelLayer.MultipartGeometryBehaviour == LabelLayer.MultipartGeometryBehaviourEnum.Largest)
{
var coll = (feature.Geometry as GeometryCollection);
if (coll.NumGeometries > 0)
{
double largestVal = 0;
int idxOfLargest = 0;
for (var j = 0; j < coll.NumGeometries; j++)
{
Geometry geom = coll.Geometry(j);
if (geom is LineString && ((LineString)geom).Length > largestVal)
{
largestVal = ((LineString)geom).Length;
idxOfLargest = j;
}
if (geom is MultiLineString && ((MultiLineString)geom).Length > largestVal)
{
largestVal = ((MultiLineString)geom).Length;
idxOfLargest = j;
}
if (geom is Polygon && ((Polygon)geom).Area > largestVal)
{
largestVal = ((Polygon)geom).Area;
idxOfLargest = j;
}
if (geom is MultiPolygon && ((MultiPolygon)geom).Area > largestVal)
{
largestVal = ((MultiPolygon)geom).Area;
idxOfLargest = j;
}
}
var label = CreateLabel(coll.Geometry(idxOfLargest), text, rotation, priority, style,
viewport, g);
if (label != null)
{
labels.Add(label);
}
}
}
}
else
{
var label = CreateLabel(feature.Geometry, text, rotation, priority, style, viewport, g);
if (label != null)
{
labels.Add(label);
}
}
}
}
if (labels.Count > 0) //We have labels to render...
{
if ((layerStyle is LabelStyle) && (layerStyle as LabelStyle).CollisionDetection && labelLayer.LabelFilter != null)
{
labelLayer.LabelFilter(labels);
}
foreach (Label label in labels)
{
if (!label.Show)
{
continue;
}
GdiGeometryRenderer.DrawLabel(g, label.LabelPoint, label.Style.Offset, label.Style.Font,
label.Style.ForeColor, label.Style.BackColor, label.Halo, label.Rotation, label.Text, viewport);
}
}
}
}
}
