GDI+: GdipAddPathCurve

[José Roca]

The following example creates a GraphicsPath object path, adds a cardinal spline to path, and then draws path.

C++

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VOID AddCurveExample(HDC hdc)
{
   Graphics graphics(hdc);
   PointF pts[] = {PointF(50.0f, 50.0f),
                   PointF(60.0f, 20.0f),
                   PointF(70.0f, 100.0f),
                   PointF(80.0f, 50.0f)};
   GraphicsPath path;
   path.AddCurve(pts, 4);
   // Draw the path.
   Pen pen(Color(255, 255, 0, 0));
   graphics.DrawPath(&pen, &path);
}


PowerBASIC

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SUB GDIP_AddPathCurve (BYVAL hdc AS DWORD)

   LOCAL hStatus AS LONG
   LOCAL pGraphics AS DWORD
   LOCAL pPath AS DWORD
   LOCAL pPen AS DWORD
   DIM   pts(3) AS POINTF

   hStatus = GdipCreateFromHDC(hdc, pGraphics)

   hStatus = GdipCreatePath(%FillModeAlternate, pPath)
   pts(0).x = 50 : pts(0).y = 50
   pts(1).x = 50 : pts(1).y = 20
   pts(2).x = 70 : pts(2).y = 100
   pts(3).x = 80 : pts(3).y = 50
   hStatus = GdipAddPathCurve(pPath, pts(0), 4)

   ' // Draw the path.
   hStatus = GdipCreatePen1(GDIP_ARGB(255, 255, 0, 0), 1, %UnitWorld, pPen)
   hStatus = GdipDrawPath(pGraphics, pPen, pPath)

   ' // Cleanup
   IF pPen THEN GdipDeletePen(pPen)
   IF pPath THEN GdipDeletePath(pPath)
   IF pGraphics THEN GdipDeleteGraphics(pGraphics)

END SUB