internal static void DrawEdge(Graphics graphics, DEdge dEdge)
{
DrawingEdge drawingEdge = dEdge.DrawingEdge;
if (!drawingEdge.IsVisible || drawingEdge.GeometryEdge == null)
{
return;
}
DrawingEdge edge = dEdge.DrawingEdge;
if (edge.DrawEdgeDelegate != null)
{
if (edge.DrawEdgeDelegate(edge, graphics))
{
return; //the client draws instead
}
}
if (dEdge.GraphicsPath == null)
{
dEdge.GraphicsPath = Draw.CreateGraphicsPath(dEdge.Edge.GeometryEdge.Curve);
}
EdgeAttr attr = drawingEdge.Attr;
using (var myPen = new Pen(dEdge.Color, (float)attr.LineWidth))
{
foreach (Style style in attr.Styles)
{
Draw.AddStyleForPen(dEdge, myPen, style);
}
try
{
if (dEdge.GraphicsPath != null)
{
graphics.DrawPath(myPen, dEdge.GraphicsPath);
}
}
catch
{
// sometimes on Vista it throws an out of memory exception without any obvious reason
}
Draw.DrawEdgeArrows(graphics, drawingEdge, dEdge.Color, myPen);
if (dEdge.DrawingEdge.GeometryEdge.Label != null)
{
Draw.DrawLabel(graphics, dEdge.Label);
}
#if TEST_MSAGL
if (DrawControlPoints)
{
ICurve iCurve = dEdge.DrawingEdge.GeometryEdge.Curve;
var c = iCurve as Curve;
if (c != null)
{
foreach (ICurve seg in c.Segments)
{
var cubic = seg as CubicBezierSegment;
if (cubic != null)
{
Draw.DrawControlPoints(graphics, cubic);
}
}
}
else
{
var seg = iCurve as CubicBezierSegment;
if (seg != null)
{
Draw.DrawControlPoints(graphics, seg);
}
}
}
#endif
}
}
public VEdge(Edge edge, FrameworkElement labelFrameworkElement)
{
Edge = edge;
var userData = edge.UserData;
if (userData == null)
{
CurvePath = new Path {
Data = Common.GetICurveWpfGeometry(edge.GeometryEdge.Curve),
Tag = this
};
}
else
{
Path p = new Path();
var deleg = GetDrawDelegate_FromUserData(userData);
edge.DrawEdgeDelegate = deleg;
edge.DrawEdgeDelegate(edge, p);
CurvePath = p;
p.Tag = this;
}
if (edge.DrawEdgeDelegate != null)
{
Path p = new Path();
edge.DrawEdgeDelegate(edge, p);
CurvePath = p;
p.Tag = this;
}
else
{
CurvePath = new Path {
Data = Common.GetICurveWpfGeometry(edge.GeometryEdge.Curve),
Tag = this
};
}
EdgeAttrClone = edge.Attr.Clone();
SourceArrowHeadPath = new Path {
Tag = this
};
if (edge.Attr.ArrowAtSource)
{
SourceArrowHeadPath.Data = DefiningSourceArrowHead();
}
TargetArrowHeadPath = new Path {
Tag = this
};
if (edge.Attr.ArrowAtTarget)
{
TargetArrowHeadPath.Data = DefiningTargetArrowHead(Edge.GeometryEdge.EdgeGeometry, PathStrokeThickness, Edge.Attr.ArrowheadAtTarget);
}
SetPathStroke();
if (labelFrameworkElement != null)
{
LabelFrameworkElement = labelFrameworkElement;
Common.PositionFrameworkElement(LabelFrameworkElement, edge.Label.Center, 1);
}
edge.Attr.VisualsChanged += (a, b) => Invalidate();
edge.IsVisibleChanged += obj => {
foreach (var frameworkElement in FrameworkElements)
{
frameworkElement.Visibility = edge.IsVisible ? Visibility.Visible : Visibility.Hidden;
}
};
_editingUnderlying_FrameworkElement = new Path();
_editingUnderlying_FrameworkElement.StrokeThickness = 1;
_editingUnderlying_FrameworkElement.Stroke = Brushes.Red;
_editingUnderlying_FrameworkElement.StrokeStartLineCap = PenLineCap.Triangle;
_editingUnderlying_FrameworkElement.StrokeEndLineCap = PenLineCap.Triangle;
//_editingUnderlying_FrameworkElement.Fill = Brushes.Green;
}
