/// <summary>
/// Renders a LineString to the map.
/// </summary>
/// <param name="g">IGraphics reference</param>
/// <param name="line">LineString to render</param>
/// <param name="pen">Pen style used for rendering</param>
/// <param name="map">Map reference</param>
/// <param name="offset">Offset by which line will be moved to right</param>
public void DrawLineString(IGraphics g, ILineString line, Pen pen, Map map, float offset)
{
var points = line.TransformToImage(map);
if (points.Length > 1)
{
var gp = new GraphicsPath();
if (offset != 0d)
{
points = RendererHelper.OffsetRight(points, offset);
}
gp.AddLines(/*LimitValues(*/ points /*, ExtremeValueLimit)*/);
g.DrawPath(pen, gp);
}
}
private void DrawPolygonClipped(GraphicsPath gp, PointF[] polygon, int width, int height)
{
var clipState = DetermineClipState(polygon, width, height);
if (clipState == ClipState.Within)
{
gp.AddPolygon(polygon);
}
else if (clipState == ClipState.Intersecting)
{
var clippedPolygon = RendererHelper.ClipPolygon(polygon, width, height);
if (clippedPolygon.Length > 2)
{
gp.AddPolygon(clippedPolygon);
}
}
}
public void DrawLabel(IGraphics g, PointF labelPoint, PointF offset, Font font, Color forecolor,
Brush backcolor, Pen halo, float rotation, string text, Map map,
LabelStyle.HorizontalAlignmentEnum alignment = LabelStyle.HorizontalAlignmentEnum.Left,
PointF?rotationPoint = null)
{
//Calculate the size of the text
var labelSize = RendererHelper.SizeOfString(g, text, font);
//Add label offset
labelPoint.X += offset.X;
labelPoint.Y += offset.Y;
//Translate alignment to stringalignment
StringAlignment salign;
switch (alignment)
{
case LabelStyle.HorizontalAlignmentEnum.Left:
salign = StringAlignment.Near;
break;
case LabelStyle.HorizontalAlignmentEnum.Center:
salign = StringAlignment.Center;
break;
default:
salign = StringAlignment.Far;
break;
}
if (rotation != 0 && !float.IsNaN(rotation))
{
rotationPoint = rotationPoint ?? labelPoint;
PointF pt = rotationPoint.Value;
g.FillEllipse(Brushes.LawnGreen, (int)(pt.X - 1), (int)(pt.Y - 1), 2, 2);
var t = g.Transform.Clone();
g.TranslateTransform(pt.X, pt.Y);
g.RotateTransform(rotation);
//g.TranslateTransform(-labelSize.Width/2, -labelSize.Height/2);
labelPoint = new PointF(labelPoint.X - pt.X,
labelPoint.Y - pt.Y);
//labelSize = new SizeF(labelSize.Width*0.74f + 1f, labelSize.Height*0.74f);
if (backcolor != null && backcolor != Brushes.Transparent)
{
g.FillRectangle(backcolor,
(int)labelPoint.X, (int)labelPoint.Y,
(int)labelSize.Width, (int)labelSize.Height);
}
var path = new GraphicsPath();
path.AddString(text, font.FontFamily, (int)font.Style, font.Size,
new RectangleF(labelPoint, labelSize) /* labelPoint*/,
new StringFormat {
Alignment = salign
} /*null*/);
if (halo != null)
{
g.DrawPath(halo, path);
}
g.FillPath(new SolidBrush(forecolor), path);
//g.DrawString(text, font, new System.Drawing.SolidBrush(forecolor), 0, 0);
g.Transform = t;
}
else
{
if (backcolor != null && backcolor != Brushes.Transparent)
{
g.FillRectangle(backcolor,
(int)labelPoint.X, (int)labelPoint.Y,
(int)labelSize.Width, (int)labelSize.Height);
}
var path = new GraphicsPath();
path.AddString(text, font.FontFamily, (int)font.Style, font.Size,
new RectangleF(labelPoint, labelSize) /* labelPoint*/,
new StringFormat {
Alignment = salign
} /*null*/);
if (halo != null)
{
g.DrawPath(halo, path);
}
g.FillPath(new SolidBrush(forecolor), path);
//g.DrawString(text, font, new System.Drawing.SolidBrush(forecolor), LabelPoint.X, LabelPoint.Y);
}
}
