By Ashley Davy - Saturday, February 29, 2020
How do I programmatically draw a line with an Arrow head at the end?
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By Nevron Support - Friday, March 6, 2020
The following function creates a line shape:
private NShape CreateLineShape(NPoint start, NPoint end, NStroke stroke)
{
NShape shape = new NShape();
shape.Init1DShape(EN1DShapeXForm.Vector);
shape.Height = 0;
NGeometry geom = new NGeometry();
NMoveTo moveTo = geom.MoveTo(0.0d, 0.5d);
moveTo.Relative = true;
moveTo.ShowFill = false;
geom.Stroke = stroke;
geom.LineTo(1.0d, 0.5d).Relative = true;
shape.Geometry = geom;
shape.SetBeginPoint(start);
shape.SetEndPoint(end);
return shape;
}
If you would like the line to have the default appearance of connectors you need to add the "Connectors" user class to it:
// create a line with connector styling
NShape line = CreateLineShape(new NPoint(10, 10), new NPoint(100, 200), new NStroke(1, NColor.Black));
line.UserClass = "Connector";
drawing.ActivePage.Items.Add(line);
alternatively, you can create a line with specific arrowheads like this:
// create a line with specific arrowheads
NShape line = CreateLineShape(new NPoint(10, 10), new NPoint(100, 200), new NStroke(1, NColor.Black));
line.Geometry.BeginArrowhead = new NArrowhead(ENArrowheadShape.Circle, 10, 10);
line.Geometry.EndArrowhead = new NArrowhead(ENArrowheadShape.Triangle, 10, 10);
drawing.ActivePage.Items.Add(line);
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