/// <summary>
/// Draws a line.
/// </summary>
/// <param name="g"></param>
/// <param name="l"></param>
public static void DrawBresenhamLine(this Graphics g, Line l)
{
l.LinePoints.ForEach(p =>
{
g.DrawRectangle(l.Pen, p.X, p.Y, 1, 1);
});
DrawEdgeConstraintIcon(g, l);
DrawEdgeConstraintText(g, l);
}
/// <summary>
/// Clears a line.
/// </summary>
/// <param name="g"></param>
/// <param name="l"></param>
public static void ClearBresenhamLine(this Graphics g, Line l)
{
using (var pen = new Pen(l.BackgroudColor, l.Pen.Width))
l.LinePoints.ForEach(p =>
{
g.DrawRectangle(pen, p.X, p.Y, 1, 1);
});
ClearEdgeConstraintIcon(g, l);
ClearEdgeConstraintText(g, l);
}
private static void DrawEdgeConstraintIcon(this Graphics g, Line l)
{
Point p = l.LinePoints[l.LinePoints.Count / 2];
p.X += 4;
p.Y += 4;
if (l.Constraint != null && l.Constraint.Icon != null)
{
g.DrawImage(l.Constraint.Icon, p.X, p.Y, l.Constraint.PrefferedIconSize.width, l.Constraint.PrefferedIconSize.height);
}
}
private static void ClearEdgeConstraintIcon(this Graphics g, Line l)
{
Point p = l.LinePoints[l.LinePoints.Count / 2];
p.X += 4;
p.Y += 4;
using (var b = new SolidBrush(l.BackgroudColor))
{
if (l.Constraint != null && l.Constraint.Icon != null)
{
g.FillRectangle(b, p.X, p.Y, l.Constraint.PrefferedIconSize.width, l.Constraint.PrefferedIconSize.height);
}
}
}
private static void ClearEdgeConstraintText(this Graphics g, Line l)
{
Point p = l.LinePoints[l.LinePoints.Count / 2];
p.X += 4;
p.Y += 4;
using (var brush = new SolidBrush(l.BackgroudColor))
{
using (var font = new Font("Calibri", 10))
{
if (l.Constraint != null && l.Constraint.ConstraintText != null && l.Constraint.ConstraintText != "")
{
var textSize = TextRenderer.MeasureText(l.Constraint.ConstraintText, font);
g.FillRectangle(brush, p.X, p.Y, textSize.Width, textSize.Height);
}
}
}
}
private static void DrawEdgeConstraintText(this Graphics g, Line l)
{
Point p = l.LinePoints[l.LinePoints.Count / 2];
p.X += 4;
p.Y += 4;
using (var brush = new SolidBrush(Color.Beige))
{
using (var font = new Font("Calibri", 10))
{
if (l.Constraint != null && l.Constraint.ConstraintText != null && l.Constraint.ConstraintText != "")
{
var textSize = TextRenderer.MeasureText(l.Constraint.ConstraintText, font);
g.FillRectangle(brush, p.X, p.Y, textSize.Width, textSize.Height);
g.DrawString(l.Constraint.ConstraintText, new Font("Calibri", 10), Brushes.Red, new Rectangle(p.X, p.Y, textSize.Width, textSize.Height));
}
}
}
}