public IDisplayCharacterRanges MeasureCharacterWidth(IDisplay display)
{
if (_measureTextWidth != null)
{
return(_measureTextWidth);
}
var format = StringFormatFromAlignment(_align);
IDisplayCharacterRanges ranges = display.Canvas.DisplayCharacterRanges(_font, format, _text);
return(ranges);
}
public List <IAnnotationPolygonCollision> AnnotationPolygon(IDisplay display, IGeometry geometry, TextSymbolAlignment symbolAlignment)
{
if (_font == null || _text == null || display.Canvas == null)
{
return(null);
}
List <IAnnotationPolygonCollision> polygons = new List <IAnnotationPolygonCollision>();
if (geometry is IPoint)
{
#region IPoint
double x = ((IPoint)geometry).X;
double y = ((IPoint)geometry).Y;
display.World2Image(ref x, ref y);
var annotationPolygon = AnnotationPolygon(display, (float)x, (float)y, symbolAlignment);
annotationPolygon.Rotate((float)x, (float)y, Angle);
polygons.Add(annotationPolygon);
#endregion
}
else if (geometry is IMultiPoint)
{
#region IMultipoint
IMultiPoint pColl = (IMultiPoint)geometry;
for (int i = 0; i < pColl.PointCount; i++)
{
double x = pColl[i].X;
double y = pColl[i].Y;
display.World2Image(ref x, ref y);
var annotationPolygon = AnnotationPolygon(display, (float)x, (float)y, symbolAlignment);
annotationPolygon.Rotate((float)x, (float)y, Angle);
polygons.Add(annotationPolygon);
}
#endregion
}
else if (geometry is IDisplayPath)
{
if (String.IsNullOrEmpty(_text))
{
return(null);
}
IDisplayPath path = (IDisplayPath)geometry;
#region Text On Path
var format = StringFormatFromAlignment(_align);
IDisplayCharacterRanges ranges = this.MeasureCharacterWidth(display);
float sizeW = ranges.Width;
float stat0 = path.Chainage, stat1 = stat0 + sizeW, stat = stat0;
if (stat0 < 0)
{
return(null);
}
#region Richtung des Textes
CanvasPointF?p1_ = path.PointAt(stat0); //SpatialAlgorithms.Algorithm.DisplayPathPoint(path, stat0);
CanvasPointF?p2_ = path.PointAt(stat1); //SpatialAlgorithms.Algorithm.DisplayPathPoint(path, stat1);
if (!p1_.HasValue || !p2_.HasValue)
{
return(null);
}
if (p1_.Value.X > p2_.Value.X)
{
#region Swap Path Direction
path.ChangeDirection();
stat = stat0 = path.Length - stat1;
stat1 = stat0 + sizeW;
#endregion
}
#endregion
AnnotationPolygonCollection charPolygons = new AnnotationPolygonCollection();
float x, y, angle;
for (int i = 0; i < _text.Length; i++)
{
CanvasRectangleF cSize = ranges[i];
int counter = 0;
while (true)
{
CanvasPointF?p1 = path.PointAt(stat); //SpatialAlgorithms.Algorithm.DisplayPathPoint(path, stat);
CanvasPointF?p2 = path.PointAt(stat + cSize.Width);
if (!p1.HasValue || !p2.HasValue)
{
return(null);
}
angle = (float)(Math.Atan2(p2.Value.Y - p1.Value.Y, p2.Value.X - p1.Value.X) * 180.0 / Math.PI);
//float ccc = 0f;
//angle = 0f;
//for (float xxx = 0f; xxx <= cSize.Width; xxx += cSize.Width / 10f, ccc += 1f)
//{
// p2 = path.PointAt(stat + xxx/*cSize.Width*/); //SpatialAlgorithms.Algorithm.DisplayPathPoint(path, stat + cSize.Width);
// if (p1 == null || p2 == null)
// return null;
// angle += (float)(Math.Atan2(((PointF)p2).Y - ((PointF)p1).Y, ((PointF)p2).X - ((PointF)p1).X) * 180.0 / Math.PI);
//}
//angle /= ccc;
x = p1.Value.X; y = p1.Value.Y;
AnnotationPolygon polygon = null;
switch (format.LineAlignment)
{
case StringAlignment.Near:
polygon = new Symbology.AnnotationPolygon((float)x + .1f * cSize.Width, (float)y + .2f * cSize.Height,
.8f * cSize.Width, .6f * cSize.Height);
break;
case StringAlignment.Far:
polygon = new Symbology.AnnotationPolygon((float)x + .1f * cSize.Width, (float)y - .8f * cSize.Height,
.8f * cSize.Width, .6f * cSize.Height);
break;
default:
polygon = new Symbology.AnnotationPolygon((float)x + .1f * cSize.Width, (float)y - .6f * cSize.Height / 2f,
.8f * cSize.Width, .6f * cSize.Height);
break;
}
polygon.Rotate((float)x, (float)y, Angle + angle);
if (charPolygons.CheckCollision(polygon))
{
stat += cSize.Width / 10.0f;
counter++;
if (counter > 7)
{
return(null);
}
continue;
}
charPolygons.Add(polygon);
//using (System.Drawing.Drawing2D.GraphicsPath grpath = new System.Drawing.Drawing2D.GraphicsPath())
//{
// grpath.StartFigure();
// grpath.AddLine(polygon[0], polygon[1]);
// grpath.AddLine(polygon[1], polygon[2]);
// grpath.AddLine(polygon[2], polygon[3]);
// grpath.CloseFigure();
// display.GraphicsContext.FillPath(Brushes.Aqua, grpath);
//}
break;
}
stat += cSize.Width;// +_font.Height * 0.1f;
}
if (charPolygons.Count > 0)
{
#region Glättung
//for (int i = 1; i < charPolygons.Count - 1; i++)
//{
// double angle0 = ((AnnotationPolygon)charPolygons[i - 1]).Angle;
// double angle2 = ((AnnotationPolygon)charPolygons[i + 1]).Angle;
// ((AnnotationPolygon)charPolygons[i]).Angle = (angle0 + angle2) * 0.5;
// float x0 = ((AnnotationPolygon)charPolygons[i - 1]).X1;
// float y0 = ((AnnotationPolygon)charPolygons[i - 1]).Y1;
// float x2 = ((AnnotationPolygon)charPolygons[i + 1]).X1;
// float y2 = ((AnnotationPolygon)charPolygons[i + 1]).Y1;
// ((AnnotationPolygon)charPolygons[i]).X1 = (x0 + x2) * 0.5f;
// ((AnnotationPolygon)charPolygons[i]).Y1 = (y0 + y2) * 0.5f;
//}
#endregion
polygons.Add(charPolygons);
path.AnnotationPolygonCollision = charPolygons;
}
#endregion
}
else if (geometry is IPolyline)
{
IPolyline pLine = (IPolyline)geometry;
for (int iPath = 0; iPath < pLine.PathCount; iPath++)
{
IPath path = pLine[iPath];
if (path.PointCount == 0)
{
continue;
}
#region Simple Method
IPoint p1 = path[0], p2;
for (int iPoint = 1; iPoint < path.PointCount; iPoint++)
{
p2 = path[iPoint];
double angle = -Math.Atan2(p2.Y - p1.Y, p2.X - p1.X) * 180.0 / Math.PI;
if (display.DisplayTransformation.UseTransformation)
{
angle -= display.DisplayTransformation.DisplayRotation;
}
if (angle < 0)
{
angle += 360;
}
if (angle > 90 && angle < 270)
{
angle -= 180;
}
var format = StringFormatFromAlignment(_align);
double x, y;
if (format.Alignment == StringAlignment.Center)
{
x = p1.X * 0.5 + p2.X * 0.5;
y = p1.Y * 0.5 + p2.Y * 0.5;
}
else if (format.Alignment == StringAlignment.Far)
{
x = p2.X;
y = p2.Y;
}
else
{
x = p1.X;
y = p1.Y;
}
display.World2Image(ref x, ref y);
var annotationPolygon = AnnotationPolygon(display, (float)x, (float)y, symbolAlignment);
annotationPolygon.Rotate((float)x, (float)y, Angle);
polygons.Add(annotationPolygon);
p1 = p2;
}
#endregion
}
}
return(polygons.Count > 0 ? polygons : null);
}
public void Draw(IDisplay disp, IFeature feature)
{
if (!(_symbol is ISymbol))
{
return;
}
string expr = _expression;
foreach (FieldValue fv in feature.Fields)
{
if (fv.Name == _fieldname && !_useExpression)
{
_symbol.Text = fv.Value.ToString();
}
if (fv.Name == _symbolRotation.RotationFieldName)
{
try
{
_symbol.Rotation = (float)_symbolRotation.Convert2DEGAritmetic(Convert.ToDouble(fv.Value));
}
catch { }
}
if (_useExpression)
{
expr = expr.Replace("[" + fv.Name + "]", fv.Value.ToString());
}
}
if (_useExpression)
{
_symbol.Text = expr;
}
if (String.IsNullOrEmpty(_symbol.Text))
{
return;
}
if (_howManyLabels == howManyLabels.one_per_name)
{
if (_labelStrings.Contains(_symbol.Text.Trim()))
{
return;
}
}
if (feature.Shape is IPoint)
{
if (disp.LabelEngine.TryAppend(disp, _symbol, feature.Shape, _labelPriority != labelPriority.always) == LabelAppendResult.Succeeded)
{
if (_howManyLabels == howManyLabels.one_per_name)
{
_labelStrings.Add(_symbol.Text.Trim());
}
}
}
else if (feature.Shape is IMultiPoint)
{
var multiPoint = (IMultiPoint)feature.Shape;
for (int i = 0, i_to = multiPoint.PointCount; i < i_to; i++)
{
if (multiPoint[i] == null)
{
continue;
}
if (disp.LabelEngine.TryAppend(disp, _symbol, multiPoint[i], _labelPriority != labelPriority.always) == LabelAppendResult.Succeeded)
{
if (_howManyLabels == howManyLabels.one_per_name)
{
_labelStrings.Add(_symbol.Text.Trim());
}
if (_howManyLabels == howManyLabels.one_per_part)
{
break;
}
}
}
}
else if (feature.Shape is IPolyline)
{
IPoint point1 = null, point2 = null;
double maxLenght = 0;
IEnvelope dispEnv = _clipEnvelope; //disp.Envelope;
//if (disp.GeometricTransformer != null)
//{
// object e = disp.GeometricTransformer.InvTransform2D(disp.Envelope);
// if (e is IGeometry) dispEnv = ((IGeometry)e).Envelope;
//}
IPolyline pLine = (IPolyline)gView.Framework.SpatialAlgorithms.Clip.PerformClip(dispEnv, feature.Shape);
if (pLine == null)
{
return;
}
if (_lineLabelling == CartographicLineLabeling.CurvedText)
{
#region Text On Path
IDisplayCharacterRanges ranges = _symbol.MeasureCharacterWidth(disp);
if (ranges == null)
{
return;
}
float textWidth = ranges.Width;
for (int iPath = 0; iPath < pLine.PathCount; iPath++)
{
IPath path = pLine[iPath];
if (path == null)
{
continue;
}
IPointCollection pathPoints = path;
if (disp.GeometricTransformer != null)
{
pathPoints = (IPointCollection)disp.GeometricTransformer.Transform2D(pathPoints);
}
Geometry.DisplayPath displayPath = new Geometry.DisplayPath();
for (int iPoint = 0; iPoint < pathPoints.PointCount; iPoint++)
{
double x = pathPoints[iPoint].X, y = pathPoints[iPoint].Y;
disp.World2Image(ref x, ref y);
displayPath.AddPoint(new System.Drawing.PointF((float)x, (float)y));
}
float pathLenght = displayPath.Length;
if (pathLenght == 0.0 || textWidth > pathLenght)
{
continue;
}
displayPath.Chainage = pathLenght / 2f - textWidth / 2f;
float nextChainage = pathLenght / 10f;
bool found = false;
while (!found)
{
if (disp.LabelEngine.TryAppend(disp, _symbol, displayPath, _labelPriority != labelPriority.always) == LabelAppendResult.Succeeded)
{
found = true;
if (_howManyLabels == howManyLabels.one_per_name)
{
_labelStrings.Add(_symbol.Text.Trim());
}
if (_howManyLabels != howManyLabels.one_per_part)
{
break;
}
}
if (!found)
{
displayPath.Chainage = nextChainage;
nextChainage += pathLenght / 10f;
}
if (displayPath.Chainage + textWidth > pathLenght)
{
break;
}
}
}
#endregion
}
else if (_lineLabelling == CartographicLineLabeling.Horizontal ||
_lineLabelling == CartographicLineLabeling.Perpendicular)
{
#region Horizontal
for (int iPath = 0; iPath < pLine.PathCount; iPath++)
{
IPath path = pLine[iPath];
for (int iPoint = 0; iPoint < path.PointCount - 1; iPoint++)
{
IPoint p1 = path[iPoint];
IPoint p2 = path[iPoint + 1];
if (dispEnv.minx <= p1.X && dispEnv.maxx >= p1.X &&
dispEnv.miny <= p1.Y && dispEnv.maxy >= p1.Y &&
dispEnv.minx <= p2.X && dispEnv.maxx >= p2.X &&
dispEnv.miny <= p2.Y && dispEnv.maxy >= p2.Y)
{
double len = Math.Sqrt((p1.X - p2.X) * (p1.X - p2.X) + (p1.Y - p2.Y) * (p1.Y - p2.Y));
if (len > maxLenght)
{
maxLenght = len;
//alpha = Math.Atan2((p2.Y - p1.Y), (p2.X - p1.X));
point1 = p1;
point2 = p2;
}
}
}
}
if (point1 != null && point2 != null)
{
Point p = new Point(point1.X * 0.5 + point2.X * 0.5,
point1.Y * 0.5 + point2.Y * 0.5);
if (_lineLabelling == CartographicLineLabeling.Perpendicular)
{
double angle = Math.Atan2(point2.X - point1.X, point2.Y - point1.Y) * 180.0 / Math.PI;
if (angle < 0)
{
angle += 360;
}
if (angle > 90 && angle < 270)
{
angle -= 180;
}
_symbol.Angle = (float)angle;
}
if (disp.LabelEngine.TryAppend(disp, _symbol, p, _labelPriority != labelPriority.always) == LabelAppendResult.Succeeded)
{
if (_howManyLabels == howManyLabels.one_per_name)
{
_labelStrings.Add(_symbol.Text.Trim());
}
}
}
#endregion
}
else
{
#region Parallel Labelling
for (int iPath = 0; iPath < pLine.PathCount; iPath++)
{
IPath path = pLine[iPath];
for (int iPoint = 0; iPoint < path.PointCount - 1; iPoint++)
{
IPoint p1 = path[iPoint];
IPoint p2 = path[iPoint + 1];
if (dispEnv.minx <= p1.X && dispEnv.maxx >= p1.X &&
dispEnv.miny <= p1.Y && dispEnv.maxy >= p1.Y &&
dispEnv.minx <= p2.X && dispEnv.maxx >= p2.X &&
dispEnv.miny <= p2.Y && dispEnv.maxy >= p2.Y)
{
double len = Math.Sqrt((p1.X - p2.X) * (p1.X - p2.X) + (p1.Y - p2.Y) * (p1.Y - p2.Y));
if (len > maxLenght)
{
maxLenght = len;
//alpha = Math.Atan2((p2.Y - p1.Y), (p2.X - p1.X));
point1 = p1;
point2 = p2;
}
}
}
}
if (point1 != null && point2 != null)
{
pLine = new Polyline();
pLine.AddPath(new Path());
pLine[0].AddPoint(point1);
pLine[0].AddPoint(point2);
if (disp.LabelEngine.TryAppend(disp, _symbol, pLine, _labelPriority != labelPriority.always) == LabelAppendResult.Succeeded)
{
if (_howManyLabels == howManyLabels.one_per_name)
{
_labelStrings.Add(_symbol.Text.Trim());
}
}
}
#endregion
}
}
else if (feature.Shape is IPolygon)
{
LabelPolygon(disp, (IPolygon)feature.Shape);
}
}