/// <summary>
/// Render this marker using the slope of the given line segment
/// </summary>
/// <param name="pRenderer"></param>
/// <param name="pOwner"></param>
/// <param name="pMarkerPoint1"></param>
/// <param name="pMarkerPoint2"></param>
public void RenderMarker(SvgRenderer pRenderer, SvgPath pOwner, PointF pRefPoint, PointF pMarkerPoint1, PointF pMarkerPoint2)
{
float xDiff = pMarkerPoint2.X - pMarkerPoint1.X;
float yDiff = pMarkerPoint2.Y - pMarkerPoint1.Y;
float fAngle1 = (float)(Math.Atan2(yDiff, xDiff) * 180.0 / Math.PI);
RenderPart2(fAngle1, pRenderer, pOwner, pRefPoint);
}
public void TestAddingPath()
{
var doc = new SvgDocument();
var elements = doc.ParseFragment(TestingSources.SvgFragmentGroup);
var epath = (SvgPath)elements[0].Children[0];
var path = new SvgPath();
doc.Children.Add(path);
path.PathData.Add(epath.Path);
SaveText(doc.ToString(), "PathDataAddPath.svg");
}
/// <summary>
/// Create a pen that can be used to render this marker
/// </summary>
/// <param name="pStroke"></param>
/// <returns></returns>
private Pen CreatePen(SvgPath pPath)
{
Brush pBrush = pPath.Stroke.GetBrush(this, Opacity);
switch (MarkerUnits)
{
case SvgMarkerUnits.strokeWidth:
return(new Pen(pBrush, StrokeWidth * pPath.StrokeWidth));
case SvgMarkerUnits.userSpaceOnUse:
return(new Pen(pBrush, StrokeWidth));
}
return(new Pen(pBrush, StrokeWidth));
}
/// <summary>
/// Create a pen that can be used to render this marker
/// </summary>
/// <param name="pStroke"></param>
/// <returns></returns>
private Pen CreatePen(SvgPath pPath, SvgRenderer renderer)
{
Brush pBrush = pPath.Stroke.GetBrush(this, renderer, Opacity);
switch (MarkerUnits)
{
case SvgMarkerUnits.strokeWidth:
return(new Pen(pBrush, StrokeWidth.ToDeviceValue(renderer, UnitRenderingType.Other, this) *
pPath.StrokeWidth.ToDeviceValue(renderer, UnitRenderingType.Other, this)));
case SvgMarkerUnits.userSpaceOnUse:
return(new Pen(pBrush, StrokeWidth.ToDeviceValue(renderer, UnitRenderingType.Other, this)));
}
return(new Pen(pBrush, StrokeWidth.ToDeviceValue(renderer, UnitRenderingType.Other, this)));
}
/// <summary>
/// Common code for rendering a marker once the orientation angle has been calculated
/// </summary>
/// <param name="fAngle"></param>
/// <param name="pRenderer"></param>
/// <param name="pOwner"></param>
/// <param name="pMarkerPoint"></param>
private void RenderPart2(float fAngle, SvgRenderer pRenderer, SvgPath pOwner, PointF pMarkerPoint)
{
Pen pRenderPen = CreatePen(pOwner, pRenderer);
GraphicsPath markerPath = GetClone(pOwner);
Matrix transMatrix = new Matrix();
transMatrix.Translate(pMarkerPoint.X, pMarkerPoint.Y);
if (Orient.IsAuto)
{
transMatrix.Rotate(fAngle);
}
else
{
transMatrix.Rotate(Orient.Angle);
}
switch (MarkerUnits)
{
case SvgMarkerUnits.strokeWidth:
transMatrix.Translate(AdjustForViewBoxWidth(-RefX.ToDeviceValue(pRenderer, UnitRenderingType.Horizontal, this) *
pOwner.StrokeWidth.ToDeviceValue(pRenderer, UnitRenderingType.Other, this)),
AdjustForViewBoxHeight(-RefY.ToDeviceValue(pRenderer, UnitRenderingType.Vertical, this) *
pOwner.StrokeWidth.ToDeviceValue(pRenderer, UnitRenderingType.Other, this)));
break;
case SvgMarkerUnits.userSpaceOnUse:
transMatrix.Translate(-RefX.ToDeviceValue(pRenderer, UnitRenderingType.Horizontal, this),
-RefY.ToDeviceValue(pRenderer, UnitRenderingType.Vertical, this));
break;
}
markerPath.Transform(transMatrix);
pRenderer.DrawPath(pRenderPen, markerPath);
SvgPaintServer pFill = Fill;
SvgFillRule pFillRule = FillRule; // TODO: What do we use the fill rule for?
float fOpacity = FillOpacity;
if (pFill != null)
{
Brush pBrush = pFill.GetBrush(this, pRenderer, fOpacity);
pRenderer.FillPath(pBrush, markerPath);
pBrush.Dispose();
}
pRenderPen.Dispose();
markerPath.Dispose();
transMatrix.Dispose();
}
/// <summary>
/// Get a clone of the current path, scaled for the stroke with
/// </summary>
/// <returns></returns>
private GraphicsPath GetClone(SvgPath pPath)
{
GraphicsPath pRet = Path(null).Clone() as GraphicsPath;
switch (MarkerUnits)
{
case SvgMarkerUnits.strokeWidth:
Matrix transMatrix = new Matrix();
transMatrix.Scale(AdjustForViewBoxWidth(pPath.StrokeWidth), AdjustForViewBoxHeight(pPath.StrokeWidth));
pRet.Transform(transMatrix);
break;
case SvgMarkerUnits.userSpaceOnUse:
break;
}
return(pRet);
}
