DXF files and hollow polylines

I am trying to export to DWF but I need to take advantage of the hollow
polylines instead of solid polylines.  Has anyone found a way to do this?

I am currently using the API (DLL) version of LeadTools 14 Vector.  Thank you!

The LEADTOOLS Vector toolkit support saving polygons and polylines in DWF files. What exactly do you mean by hollow polylines?

Amin Dodin
LEADTOOLS Technical Support

 Amin wrote:The LEADTOOLS Vector toolkit support saving polygons
and polylines in DWF files. What exactly do you mean by hollow polylines?

When I convert my vector data to DWF (or SVG for that matter) polygons,
when viewed in AutoDesk's DWF Viewer (or Adobe's SVG viewer) the
polygons are completed filled in with black, what I have read is
referred to as a solid polygon.  What I want is for the polygon to not be filled, a hollow polygon.


In talking with Travis in LeadTools support, he told me I should be
able to specify the brush type and make it hollow, which I am doing I
believe, but it is not working, so was curious as to why.  I am setting the brush with the following code:

              T.Brush.nSize := SizeOf(VECTORBRUSH);
              T.Brush.VectorBrushStyle := VECTORBRUSH_STANDARD;

              T.Brush.StandardBrush.LogicalBrush.lbStyle := BS_HOLLOW;

I added the following C code to our DLL Vector Demo after the call to L_VecDlgNewObject:
if (VECTOR_POLYGON == nType)
{
   VECTORPOLYGON T;
   L_VecGetObject(pData->pVector, &Object, VECTOR_POLYGON, &T);
   T.Brush.nSize = sizeof(VECTORBRUSH);
   T.Brush.VectorBrushStyle = VECTORBRUSH_STANDARD;
   T.Brush.BrushType.StandardBrush.LogBrush.lbStyle = BS_HOLLOW;
   L_VecSetObject(pData->pVector, &Object, VECTOR_POLYGON, &T);
   MessageBox(hWnd, "Modified to become transparent", "Test Hollow", MB_OK);
}


I added a rectangle and polygon objects and made each of them solid in
a different brush color. I saved 2 copies of the drawing as SVG, one of
them with this code enabled and another without it. I'm attaching these file here.

Amin Dodin

LEADTOOLS Technical Support

Thank you, that did solve that problem!  In Delphi's case the syntax/naming is slightly different but still works:

<VECTOROBJECT>.Brush.StandardBrush.LogicalBrush.lbStyle := BS_HOLLOW;