/// <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, CompositionManager.EEditorMode mode, 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;
Pen pen = linePen;
Pen penTriangle = Pens.Red;
Brush brush = Brushes.Blue;
if (mode == CompositionManager.EEditorMode.RunButNotReloaded)
{
pen = linePenDisabled;
brush = Brushes.LightGray;
penTriangle = Pens.Gray;
}
g.DrawLine(pen, 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(brush, windowTrianglePoints, System.Drawing.Drawing2D.FillMode.Alternate);
g.DrawPolygon(penTriangle, windowTrianglePoints);
}
}
