/// <summary>
/// Draw connection (i.e. line with triangle) to specific graphics object.
/// </summary>
/// <param name="windowPosition">Position of window described by graphics object in composition area.</param>
/// <param name="g">Graphics where connection should be drawn.</param>
public void Draw(Point windowPosition, Graphics g)
{
float startX = _providingModel.GetMidPoint().X;
float startY = _providingModel.GetMidPoint().Y;
float endX = _acceptingModel.GetMidPoint().X;
float endY = _acceptingModel.GetMidPoint().Y;
// calculate triangle point in area points and store them internally
_trianglePoints = GetTrianglePoints(startX, startY, endX, endY);
// recalculate trinagle points so they correspond to window and can be draw
Point[] windowTrianglePoints = new Point[3];
for (int i = 0; i < 3; i++)
{
windowTrianglePoints[i].X = _trianglePoints[i].X - windowPosition.X;
windowTrianglePoints[i].Y = _trianglePoints[i].Y - windowPosition.Y;
}
// modify start and end so they correspond to window
startX -= windowPosition.X;
startY -= windowPosition.Y;
endX -= windowPosition.X;
endY -= windowPosition.Y;
g.DrawLine(linePen, startX, startY, endX, endY);
// we draw the triangle only the link is at least 10 pixels
if (Math.Abs(startX - endX) + Math.Abs(startY - endY) > 10)
{
g.FillPolygon(Brushes.Blue, windowTrianglePoints, System.Drawing.Drawing2D.FillMode.Alternate);
g.DrawPolygon(Pens.Red, windowTrianglePoints);
}
}
/// <summary>
/// Draw connection (i.e. line with triangle) to specific graphics object.
/// </summary>
/// <param name="windowPosition">Position of window described by graphics object in composition area.</param>
/// <param name="g">Graphics where connection should be drawn.</param>
public Point[] Draw(Point windowPosition, Graphics g)
{
Pen arrowPen = new Pen(Color.Black, 1.6F);
float startX = _providingModel.GetMidPoint().X;
float startY = _providingModel.GetMidPoint().Y;
float endX = _acceptingModel.GetMidPoint().X;
float endY = _acceptingModel.GetMidPoint().Y;
// calculate triangle point in area points and store them internally
_trianglePoints = GetTrianglePoints(startX, startY, endX, endY);
// recalculate trinagle points so they correspond to window and can be draw
Point[] windowTrianglePoints = new Point[3];
for (int i = 0; i < 3; i++)
{
windowTrianglePoints[i].X = _trianglePoints[i].X - windowPosition.X;
windowTrianglePoints[i].Y = _trianglePoints[i].Y - windowPosition.Y;
}
// modify start and end so they correspond to window
startX -= windowPosition.X;
startY -= windowPosition.Y;
endX -= windowPosition.X;
endY -= windowPosition.Y;
//draw curved line
Point[] lineArray = new Point[4];
lineArray[0] = new Point((int)startX, (int)startY);
lineArray[1] = new Point((int)startX - (((int)startX - (int)endX) / 3), (int)startY);
lineArray[2] = new Point((int)endX - (((int)endX - (int)startX) / 3), (int)endY);
lineArray[3] = new Point((int)endX, (int)endY);
//Point[] lineArray2 = new Point[4];
//lineArray2[0] = new Point((int)startX, (int)startY);
//lineArray2[1] = new Point((int)startX + (int)((endX - startX) / 4), (int)startY);
//lineArray2[2] = new Point((int)startX + (int)((endX - startX) / 2), (int)startY + (int)((endY - startY)/2));
//lineArray2[2] = new Point((int)startX + (int)((endX - startX) * 0.75), (int)endY);
//lineArray2[3] = new Point((int)startX + (int)((endX - startX)), (int)endY);
//g.DrawCurve(new Pen(Color.Red, 1.5F), lineArray2);
//_arrowPath.AddCurve(lineArray2);
LinearGradientBrush brush = new LinearGradientBrush(lineArray[0], lineArray[3], Color.WhiteSmoke, Color.Black);
//Blend blend = new Blend();
//blend.Factors = new float[] { 0.0f, 0.1f, 0.3f, 0.5f, 0.6f, 0.7f, 0.8f, 0.9f, 1f, 1f, 1f };
//blend.Positions = new float[] { 0, 0.1f, 0.2f, 0.3f, 0.4f, 0.5f, 0.6f, 0.7f, 0.8f, 0.9f, 1.0f };
//brush.Blend = blend;
arrowPen = new Pen(brush, 1.6F);
g.SmoothingMode = SmoothingMode.AntiAlias;
g.DrawBeziers(arrowPen, lineArray);
_arrowPath.AddBeziers(lineArray);
_arrowPath.Flatten();
//g.DrawLine(linePen, startX, startY, endX, endY);
if (Math.Abs(startX - endX) + Math.Abs(startY - endY) > 10)
{
return(windowTrianglePoints);
}
else
{
return(new Point[0]);
}
}
