Difference between revisions of "Documentation/DevGuide/Drawings/Bezier Shapes"

[[Image:ClosedBezierShapeArt.png|none|thumb|300px|Closed bezier shape]]
 
  XShape xPolyPolygonBezier = createShape( xComponent, 0, 0, 0, 0,
      "com.sun.star.drawing.ClosedBezierShape");
  // take care of the fact that the shape must have been added
  // to the page before it is possible to apply changes
  XShapes xShapes = (XShapes)UnoRuntime.queryInterface( XShapes.class, xDrawPage);
  xShapes.add(xPolyPolygonBezier);
  // now it is possible to edit the PropertySet
  XPropertySet xShapeProperties = (XPropertySet)UnoRuntime.queryInterface(
      XPropertySet.class, xPolyPolygonBezier);
  // The following values are exemplary and provokes that a PolyPolygon of
  // sixteen single polygons containing four points each is created. The
  // PolyPolygon total point count will be 64.
  // If control points are used they are allowed to appear as pair only,
  // before and after such pair has to be a normal point.
  // A bezier point sequence may look like
  // this (n=normal, c=control) : n c c n c c n n c c n
  int nPolygonCount = 16;
  int nPointCount = 4;
  int nWidth = 10000;
  int nHeight = 10000;
  PolyPolygonBezierCoords aCoords = new PolyPolygonBezierCoords();
  // allocating the outer sequence
  aCoords.Coordinates = new Point[nPolygonCount][];
  aCoords.Flags = new PolygonFlags[nPolygonCount][];
  int i, n, nY;
 
  // fill the inner point sequence now
  for (nY = 0, i = 0; i < nPolygonCount; i++, nY += nHeight / nPolygonCount) {
      // create a polygon using two normal and two control points
      // allocating the inner sequence
      Point[] pPolyPoints = new Point[nPointCount];
      PolygonFlags[]pPolyFlags = new PolygonFlags[nPointCount];
      for (n = 0; n < nPointCount; n++)
          pPolyPoints[n] = new Point();
      pPolyPoints[0].X = 0;
      pPolyPoints[0].Y = nY;
      pPolyFlags [0] = PolygonFlags.NORMAL;
      pPolyPoints[1].X = nWidth / 2;
      pPolyPoints[1].Y = nHeight;
      pPolyFlags[1] = PolygonFlags.CONTROL;
      pPolyPoints[2].X = nWidth / 2;
      pPolyPoints[2].Y = nHeight;
      pPolyFlags [2] = PolygonFlags.CONTROL;
      pPolyPoints[3].X = nWidth;
      pPolyPoints[3].Y = nY;
      pPolyFlags [3] = PolygonFlags.NORMAL;
      aCoords.Coordinates[i] = pPolyPoints;
      aCoords.Flags[i] = pPolyFlags;
  }
  try {
      xShapeProperties.setPropertyValue("PolyPolygonBezier", aCoords);
  } catch (Exception ex)
  {
  }