private void CreateArrowSurface(List <Point> locations)
{
Point minPoint = GraphDiagram.MinPoint(locations);
Point maxPoint = GraphDiagram.MaxPoint(locations);
this.Position = new Point(minPoint.X - 5, minPoint.Y - 5);
this.segments.Clear();
for (int i = 0; i < locations.Count - 1; i++)
{
if (i == 0)
{
this.segments.Add(new StartSegment(this.initConnector, (Point)locations[i], (Point)locations[i + 1], this.Position));
}
else if (i < locations.Count - 2)
{
this.segments.Add(new LineSegment((Point)locations[i], (Point)locations[i + 1], (Point)locations[i - 1], this.Position));
}
else
{
this.segments.Add(new EndSegment(this.next, (Point)locations[i], (Point)locations[i + 1], (Point)locations[i - 1], this.Position));
}
}
Size size = new Size(maxPoint.X - minPoint.X + 10, maxPoint.Y - minPoint.Y + 10);
this.Surface = new Surface(size);
//the color of transparency is indicated
this.Transparent = true;
this.TransparentColor = GraphDiagram.TRASPARENT_COLOR;
this.UpdateSurface();
}
public void UpdateArrow(List <Point> points, Color arrowColor)
{
Point minPoint = GraphDiagram.MinPoint(points);
Point maxPoint = GraphDiagram.MaxPoint(points);
Size size = new Size(maxPoint.X - minPoint.X + 1, maxPoint.Y - minPoint.Y + 1);
this.Surface = new Surface(size);
this.Surface.Fill(GraphDiagram.TRASPARENT_COLOR);
for (int i = 0; i < (points.Count - 1); i++)
{
this.Surface.Draw(new Line(new Point(points[i].X - minPoint.X, points[i].Y - minPoint.Y), new Point(points[i + 1].X - minPoint.X, points[i + 1].Y - minPoint.Y)), arrowColor);
}
//The color of transparency is indicated
this.Transparent = true;
this.TransparentColor = GraphDiagram.TRASPARENT_COLOR;
this.Position = minPoint;
}
