public override void DrawShape(IView <Context, Model> view, Context context, Shape shape)
{
ArrowShape sh = (ArrowShape)shape;
context.Save();
context.Matrix = shape.Matrix;
PointD p = (sh.FromGlue != null) ?
sh.FromGlue.TransformPointToGlobal(sh.FromGlue.Center, context) : sh.From.TransformPointToGlobal(sh.From.Center, context);
p = sh.TransformPointToLocal(p, context);
context.MoveTo(p);
p = (sh.ToGlue != null) ?
sh.ToGlue.TransformPointToGlobal(sh.ToGlue.Center, context) : sh.To.TransformPointToGlobal(sh.To.Center, context);
p = shape.TransformPointToGlobal(p, context);
context.ArrowLineTo(p, sh.ArrowKindHead, sh.ArrowKindTail);
if (view.Mode == ViewMode.Render)
{
context.SetSource(sh.Style.Fill);
context.FillPreserve();
context.SetSource(sh.Style.Border);
context.LineWidth = 1.5;
context.Stroke();
}
context.Restore();
}
public override void DrawShape(IView <Context, Model> view, Context context, Shape shape)
{
Label lb = (Label)shape;
ArrowShape arrow = (ArrowShape)lb.Parent;
if (view.Mode == ViewMode.Render)
{
context.Save();
context.Matrix = shape.Matrix;
PointD pointFrom = (arrow.FromGlue != null) ?
arrow.FromGlue.TransformPointToGlobal(arrow.FromGlue.Center, context) : arrow.From.Center;
pointFrom = lb.TransformPointToLocal(pointFrom, context);
PointD pointTo = (arrow.ToGlue != null) ?
arrow.ToGlue.TransformPointToGlobal(arrow.ToGlue.Center, context) : arrow.To.Center;
pointTo = lb.TransformPointToLocal(pointTo, context);
double x = Math.Min(pointFrom.X, pointTo.X) + Math.Abs(pointFrom.X - pointTo.X) / 2;
double y = Math.Min(pointFrom.Y, pointTo.Y) + Math.Abs(pointFrom.Y - pointTo.Y) / 2;
PointD p = new PointD(x, y);
double titleWidth = context.TextExtents(lb.TextLabel).Width;
double titleHeight = context.TextExtents(lb.TextLabel).Height;
double titleX = p.X - titleWidth / 2;
double titleY = p.Y - titleHeight * 2;
double titleBoxWidth = 2 * titleWidth;
double titleBoxHeight = 3 * titleHeight;
double toRadians = Math.PI / 180;
// arc data
double xCoord, yCoord, radius, arcStart, arcEnd;
context.SetSourceRGB(0, 0, 0);
context.NewPath();
// upper right
radius = 5;
xCoord = p.X - radius + titleBoxWidth;
yCoord = -titleBoxHeight / 2 + p.Y + radius;
arcStart = 270 * toRadians;
arcEnd = 0;
context.Arc(xCoord, yCoord, radius, arcStart, arcEnd);
// lower right
radius = 5;
xCoord = p.X - radius + titleBoxWidth;
yCoord = p.Y;
arcStart = 0;
arcEnd = 90 * toRadians;
context.Arc(xCoord, yCoord, radius, arcStart, arcEnd);
// lower left
radius = 5;
xCoord = p.X + radius - titleBoxWidth / 2;
yCoord = p.Y;
arcStart = 90 * toRadians;
arcEnd = 180 * toRadians;
context.Arc(xCoord, yCoord, radius, arcStart, arcEnd);
// upper left
radius = 5;
xCoord = p.X + radius - titleBoxWidth / 2;
yCoord = -titleBoxHeight / 2 + p.Y + radius;
arcStart = 180 * toRadians;
arcEnd = 270 * toRadians;
context.Arc(xCoord, yCoord, radius, arcStart, arcEnd);
context.ClosePath();
context.SetSourceRGB(.4, .4, .4);
context.Stroke();
context.MoveTo(p);
context.SetFontSize(12);
context.SetSourceRGB(.2, .2, .2);
context.SelectFontFace("Arial", FontSlant.Normal, FontWeight.Bold);
context.ShowText(lb.TextLabel);
context.Restore();
}
}
