public void RenderTextPath(DrawingContext dc, PathGeometry pathGeometry, TextAlignment pathAlignment)
{
if (_pathChars == null)
{
throw new InvalidOperationException();
}
if (_pathChars.Count == 0)
{
return;
}
//ISvgAnimatedLength pathOffset = _svgElement.StartOffset;
SvgTextPathMethod pathMethod = (SvgTextPathMethod)_textPathElement.Method.BaseVal;
SvgTextPathSpacing pathSpacing = (SvgTextPathSpacing)_textPathElement.Spacing.BaseVal;
ISvgAnimatedLength pathOffset = this.GetPathOffset();
if (pathOffset != null && pathOffset.AnimVal.Value < 0)
{
this.RenderEndAlignedText(dc, pathGeometry, pathOffset);
}
else
{
if (pathAlignment == TextAlignment.Right)
{
this.RenderEndAlignedText(dc, pathGeometry, pathOffset);
}
else
{
this.RenderStartAlignedText(dc, pathGeometry, pathOffset, pathAlignment);
}
}
}
private void RenderTextPath(SvgTextPathElement textPath, ref Point ctp,
double rotate, WpfTextPlacement placement)
{
if (textPath.ChildNodes == null || textPath.ChildNodes.Count == 0)
{
return;
}
SvgElement targetPath = textPath.ReferencedElement as SvgElement;
if (targetPath == null)
{
return;
}
PathGeometry pathGeometry = CreateGeometry(targetPath, true) as PathGeometry;
if (pathGeometry == null)
{
return;
}
this.IsTextPath = true;
WpfTextOnPathDrawing pathDrawing = new WpfTextOnPathDrawing();
pathDrawing.BeginTextPath();
XmlNodeType nodeType = XmlNodeType.None;
foreach (XmlNode child in textPath.ChildNodes)
{
nodeType = child.NodeType;
if (nodeType == XmlNodeType.Text)
{
RenderTextPath(textPath, pathDrawing, GetText(textPath, child),
new Point(ctp.X, ctp.Y), rotate, placement);
}
else if (nodeType == XmlNodeType.Element)
{
string nodeName = child.Name;
if (string.Equals(nodeName, "tref"))
{
RenderTRefPath((SvgTRefElement)child, pathDrawing, ref ctp);
}
else if (string.Equals(nodeName, "tspan"))
{
RenderTSpanPath((SvgTSpanElement)child, pathDrawing, ref ctp);
}
}
}
WpfTextStringFormat stringFormat = GetTextStringFormat(_textElement);
ISvgAnimatedLength pathOffset = textPath.StartOffset;
SvgTextPathMethod pathMethod = (SvgTextPathMethod)textPath.Method.BaseVal;
SvgTextPathSpacing pathSpacing = (SvgTextPathSpacing)textPath.Spacing.BaseVal;
pathDrawing.DrawTextPath(_textContext, pathGeometry, pathOffset,
stringFormat.Alignment, pathMethod, pathSpacing);
pathDrawing.EndTextPath();
}
public void DrawTextPath(DrawingContext dc, PathGeometry pathGeometry,
ISvgAnimatedLength startOffset, TextAlignment alignment, SvgTextPathMethod method,
SvgTextPathSpacing spacing)
{
if (alignment == TextAlignment.Right)
{
this.DrawEndAlignedTextPath(dc, pathGeometry, startOffset);
}
else
{
this.DrawStartAlignedTextPath(dc, pathGeometry, startOffset, alignment);
}
}
public void DrawTextPath(DrawingContext dc, PathGeometry pathGeometry,
ISvgAnimatedLength startOffset, TextAlignment alignment, SvgTextPathMethod method,
SvgTextPathSpacing spacing)
{
if (alignment == TextAlignment.Right)
{
this.DrawEndAlignedTextPath(dc, pathGeometry, startOffset);
}
else
{
this.DrawStartAlignedTextPath(dc, pathGeometry, startOffset, alignment);
}
}
