protected void DrawArrowHead(Pic.Factory2D.PicGraphics graphics, Vector2D pt, Vector2D director)
{
director.Normalize();
Vector2D normal = new Vector2D(-director.Y, director.X);
double angleRad = _globalCotationProperties._arrowHeadAngle * Math.PI / 180.0;
double arrowLength = graphics.DX_inv(_globalCotationProperties._arrowLength);
// lower part of arrow head
graphics.DrawLine(LineType
, pt - arrowLength * (Math.Cos(angleRad) * director + Math.Sin(angleRad) * normal)
, pt);
// upper part of arrow head
graphics.DrawLine(LineType
, pt - arrowLength * (Math.Cos(angleRad) * director - Math.Sin(angleRad) * normal)
, pt);
}
protected override void DrawSpecific(Pic.Factory2D.PicGraphics graphics)
{
// get text size
double textWidth = 0.0, textHeight = 0.0;
graphics.GetTextSize(Text, PicGraphics.TextType.FT_COTATION, out textWidth, out textHeight);
// offset points
Vector2D pt2, pt3;
GetOffsetPoints(out pt2, out pt3);
// find out if is middle quotation
bool middle = IsMiddleQuotation(pt2, pt3, textWidth, textHeight);
if (!middle && !_globalCotationProperties._showDeportedCotations)
return;
// draw extremity segments
if (_shortLines || PicGlobalCotationProperties.ShowShortCotationLines)
{
double arrowLength = graphics.DX_inv(_globalCotationProperties._arrowLength);
Vector2D vecI = _pt0-pt2;
vecI.Normalize();
vecI *= arrowLength;
graphics.DrawLine(LineType, pt2 + vecI, pt2 - vecI);
graphics.DrawLine(LineType, pt3 + vecI, pt3 - vecI);
}
else
{
graphics.DrawLine(LineType, _pt0, pt2);
graphics.DrawLine(LineType, _pt1, pt3);
}
// draw arrow line
Vector2D ptText;
DrawArrowLine(graphics, pt2, pt3, textWidth, textHeight, out ptText, out middle);
// draw text
graphics.DrawText(Text, PicGraphics.TextType.FT_COTATION, ptText, PicGraphics.HAlignment.HA_CENTER, PicGraphics.VAlignment.VA_MIDDLE, TextDirection);
// draw arrows heads
DrawArrowHead(graphics, pt2, (middle ? 1.0 : -1.0) * (pt2 - pt3));
DrawArrowHead(graphics, pt3, (middle ? 1.0 : -1.0) * (pt3 - pt2));
}