private void DrawBezierMark(IBezierDrawContext context)
{
if (bezierControl1.Controller.BCPS != null && bezierControl1.Controller.BCPS.Length >= 2)
{
context.DrawString("S", Color.Black, Font.Height, bezierControl1.Controller.BCPS[0].Second);
context.DrawString("T", Color.Black, Font.Height, bezierControl1.Controller.BCPS[bezierControl1.Controller.BCPS.Length - 1].Second);
}
}
private void DrawTransData(IBezierDrawContext context)
{
context.DrawLines(Color.Black, new PointF[] { transBeziers.TransformRectange.TopLeft, transBeziers.TransformRectange.TopRight, transBeziers.TransformRectange.BottomRight, transBeziers.TransformRectange.BottomLeft, transBeziers.TransformRectange.TopLeft });
DrawSquare(transBeziers.TransformRectange.TopLeft, context);
DrawSquare(transBeziers.TransformRectange.TopRight, context);
DrawSquare(transBeziers.TransformRectange.BottomLeft, context);
DrawSquare(transBeziers.TransformRectange.BottomRight, context);
DrawSquare(transBeziers.TransformRectange.TopMiddle, context);
DrawSquare(transBeziers.TransformRectange.LeftMiddle, context);
DrawSquare(transBeziers.TransformRectange.RightMiddle, context);
DrawSquare(transBeziers.TransformRectange.BottomMiddle, context);
PointF center = transBeziers.TransformRectange.Center;
context.DrawEllipse(Color.Black, new RectangleF
{
X = center.X - 3,
Width = 6,
Y = center.Y - 3,
Height = 6
});
BezierControlPoint previous = null;
foreach (BezierControlPoint bcp in transBeziers.BCPS)
{
if (previous != null)
{
if (previous.ValidThird)
{
if (!bcp.ValidFirst)
{
//second bezier
DrawBezeier(previous.Second, previous.Third, bcp.Second, bcp.Second, context);
}
else
{
//third bezier
DrawBezeier(previous.Second, previous.Third, bcp.First, bcp.Second, context);
}
}
else
{
if (!bcp.ValidFirst)
{
//first bezier
context.DrawLine(Color.Black, previous.Second, bcp.Second);
}
else
{
//second bezier
DrawBezeier(previous.Second, previous.Second, bcp.First, bcp.Second, context);
}
}
}
previous = bcp;
}
}
public void Draw(IBezierDrawContext context)
{
OnBeforePaint(context);
if (tmode > TransformMode.None)
{
DrawTransData(context);
}
else
{
DrawNormalData(context);
}
OnAfterPaint(context);
}
private void DrawBezeier(PointF p1, PointF p2, PointF p3, PointF p4, IBezierDrawContext context)
{
PointF lastbezeirpoint, bezeirpoint;
lastbezeirpoint = p1;
var count = BezierCaliculate.AboutBezeirCount(ref p1, ref p2, ref p3, ref p4);
for (int i = count; i >= 0; i--)
{
float t = (float)i / count;
bezeirpoint = BezierCaliculate.GetBezeirPoint(ref p1, ref p2, ref p3, ref p4, ref t);
context.DrawLine(Color.Black, lastbezeirpoint, bezeirpoint);
lastbezeirpoint = bezeirpoint;
}
}
private void DrawNormalData(IBezierDrawContext context)
{
BezierControlPoint previous = null;
for (int i = 0; i < data.Count; i++)
{
var bcp = data[i] as BezierControlPoint;
if ((dmode & DrawMode.Anchor) == DrawMode.Anchor)
{
DrawAnchor(bcp, context);
}
if ((dmode & DrawMode.Line) == DrawMode.Line)
{
if (previous != null)
{
if (previous.ValidThird)
{
if (!bcp.ValidFirst)
{
//second bezier
DrawBezeier(previous.Second, previous.Third, bcp.Second, bcp.Second, context);
}
else
{
//third bezier
DrawBezeier(previous.Second, previous.Third, bcp.First, bcp.Second, context);
}
}
else
{
if (!bcp.ValidFirst)
{
//first bezier
context.DrawLine(Color.Black, previous.Second, bcp.Second);
}
else
{
//second bezier
DrawBezeier(previous.Second, previous.Second, bcp.First, bcp.Second, context);
}
}
}
}
previous = bcp;
}
}
private void DrawAnchor(BezierControlPoint bcp, IBezierDrawContext context)
{
if (SelectedPoint == bcp)
{
FillSquare(bcp.Second, context);
if (bcp.ValidFirst)
{
FillSquare(bcp.First, context);
context.DrawLine(Color.Black, bcp.First, bcp.Second);
}
if (bcp.ValidThird)
{
FillSquare(bcp.Third, context);
context.DrawLine(Color.Black, bcp.Second, bcp.Third);
}
}
else
{
DrawSquare(bcp.Second, context);
}
}
private void DrawCenter(IBezierDrawContext context)
{
context.DrawLine(Color.FromArgb(128, 0, 0, 0), new Point(bezierControl1.Width / 2, 0), new Point(bezierControl1.Width / 2, bezierControl1.Height));
context.DrawLine(Color.FromArgb(128, 0, 0, 0), new Point(0, bezierControl1.Height / 2), new Point(bezierControl1.Width, bezierControl1.Height / 2));
}
public UserPaintEventArgs(IBezierDrawContext context)
{
Context = context;
}
private void DrawSquare(PointF p, IBezierDrawContext context)
{
context.DrawRectangle(Color.Black, p.X - 3, p.Y - 3, 6, 6);
}