private void RenderPolylinePrimitive(Graphics g, PolylineRecord polyline)
{
// this line cap size and scaling was accomplished after a lot of tinkering
// and working around limitations of the System.Drawing library that does
// things weird when the pen width is less than 2 pixels
var penWidth = ScaleLineWidth(polyline.LineWidth);
var scaleStroke = Math.Max(1.0f, (polyline.LineShapeSize + 1));
var scaleFill = Math.Max(1.0f, (polyline.LineShapeSize + 1));
if (polyline.LineWidth == 0)
{
// if line width is 0 (hairline) then here we use 1 pixel as things go badly
// if the pen width is close to zero
scaleStroke *= ScaleLineWidth(LineWidth.Small);
scaleFill *= ScaleLineWidth(LineWidth.Small) * 0.5f;
penWidth = 1.0f;
}
else if (penWidth < 2.0f)
{
scaleStroke *= 1.0f;
scaleFill *= ScaleLineWidth(LineWidth.Small) * 0.5f;
}
using (var pen = CreatePen(polyline.Color, penWidth))
{
pen.DashCap = DashCap.Round;
switch (polyline.LineStyle)
{
case LineStyle.Dashed:
pen.DashStyle = DashStyle.Dash;
break;
case LineStyle.Dotted:
pen.DashStyle = DashStyle.Dot;
break;
default:
pen.DashStyle = DashStyle.Solid;
break;
}
if (polyline.StartLineShape != LineShape.None)
{
pen.StartCap = LineCap.Custom;
pen.CustomStartCap = GetLineShapeCap(polyline.StartLineShape, scaleFill, scaleStroke);
}
if (polyline.EndLineShape != LineShape.None)
{
pen.EndCap = LineCap.Custom;
pen.CustomEndCap = GetLineShapeCap(polyline.EndLineShape, scaleFill, scaleStroke);
}
var points = polyline.Location.Select(loc => ScreenFromWorld(loc)).ToArray();
g.DrawLines(pen, points);
}
}
/// <summary>
/// Instantiates a record according to its record type number.
/// </summary>
/// <param name="recordType">Integer representing the record type.</param>
/// <returns>A new empty instance of a record primitive.</returns>
private SchPrimitive CreateRecord(int recordType)
{
SchPrimitive record;
switch (recordType)
{
case 1:
record = new SchComponent();
break;
case 2:
record = new PinRecord();
break;
case 3:
record = new SymbolRecord();
break;
case 4:
record = new TextStringRecord();
break;
case 5:
record = new BezierRecord();
break;
case 6:
record = new PolylineRecord();
break;
case 7:
record = new PolygonRecord();
break;
case 8:
record = new EllipseRecord();
break;
case 9:
record = new PieChartRecord();
break;
case 10:
record = new RoundedRectangleRecord();
break;
case 11:
record = new EllipticalArcRecord();
break;
case 12:
record = new ArcRecord();
break;
case 13:
record = new LineRecord();
break;
case 14:
record = new RectangleRecord();
break;
case 28:
case 209:
record = new TextFrameRecord();
break;
case 30:
record = new ImageRecord();
break;
case 34:
record = new Record34();
break;
case 41:
record = new Record41();
break;
case 44:
record = new Record44();
break;
case 45:
record = new Record45();
break;
case 46:
record = new Record46();
break;
case 48:
record = new Record48();
break;
default:
EmitWarning($"Record {recordType} not supported");
record = new SchPrimitive();
break;
}
return(record);
}
