/// <summary>
/// Start drawing a Figure flow (continuous),must call <see cref="EndFigures"/> to end this Figure or combine Figures(generate by <see cref="BeginFigure(PenF, Color?, PointF, bool)"/>)
/// </summary>
public void BeginFigure(PenF pen, Color?fillColor, PointF begin, bool isClosed)
{
pen.Color = _transform.Transform(pen.Color);
if (fillColor.HasValue)
{
fillColor = _transform.Transform(fillColor.Value);
}
if (_begin.HasValue)
{
if (_subGeo.IsClosed && _begin != _current)
{
_LineTo(_begin.Value, true);
}
else
{
_subGeo.UnClosedLine = _DrawLine(PenF.NULL, _current.Value, _begin.Value);
}
}
begin = _transform.Transform(begin);
_begin = begin;
_current = begin;
_subGeo = new _SimpleGeometry(pen, fillColor, _begin.Value, isClosed);
if (_geo == null)
{
_geo = new _ComplexGeometry()
{
_bounds = RectF.Empty
}
}
;
_geo.AddChild(_subGeo);
}
public void DrawArrow(Color fillColor, PointF origin, float height, float width, VectorF direction, bool isFixedSize)
{
fillColor = _transform.Transform(fillColor);
origin = _transform.Transform(origin);
direction = _transform.Transform(-direction);
direction.Normalize();
if (isFixedSize)
{
_primitives.Add(new _Arrow(origin, height, width, direction, fillColor));
}
else
{
var p1 = origin + direction * height;
var v = new VectorF(direction.Y, -direction.X);
var wd = v * width / 2;
var p2 = p1 + wd;
p1 -= wd;
var geo = new _ComplexGeometry();
var subgeo = new _SimpleGeometry(PenF.NULL, fillColor, origin, false);
subgeo.StreamTo(new _Line(origin, p1, PenF.NULL));
subgeo.StreamTo(new _Line(p1, p2, PenF.NULL));
subgeo.StreamTo(new _Line(p2, origin, PenF.NULL));
geo.AddChild(subgeo);
geo.Close();
_primitives.Add(geo);
}
}
private void _DrawRectangle(PenF pen, Color?fillColor, params PointF[] points)
{
var geo = new _ComplexGeometry();
var subgeo = new _SimpleGeometry(pen, fillColor, points[0], false);
subgeo.StreamTo(new _Line(points[0], points[1], pen));
subgeo.StreamTo(new _Line(points[1], points[2], pen));
subgeo.StreamTo(new _Line(points[2], points[3], pen));
subgeo.StreamTo(new _Line(points[3], points[0], pen));
geo.AddChild(subgeo);
geo.Close();
_primitives.Add(geo);
}
private void _EndFigures(bool flag = false)
{
if (_geo == null)
{
throw new InvalidOperationException("Must call BeginFigure before call this method!");
}
if (_subGeo.IsClosed && _begin != _current)
{
_LineTo(_begin.Value, true);
}
else
{
_subGeo.UnClosedLine = _DrawLine(PenF.NULL, _current.Value, _begin.Value);
}
_geo.Close();
_geo._wholeFill = flag;
_primitives.Add(_geo);
_geo = null;
_begin = null;
_current = null;
}
