Re: [platform-swt-dev] How to create a Path using PathData ?

[Silenio Quarti <Silenio_Quarti@xxxxxxxxxx>]

Note that your SWT.PATH_LINE_TO switch
is wrong, if you fix that it is gone to work
properly.

Silenio

"Thomas Wojcik" <tomwoj@xxxxxxx>
Sent by: platform-swt-dev-bounces@xxxxxxxxxxx

06/28/2005 08:50 AM

Please respond to
"Eclipse Platform SWT component developers list."

To	<platform-swt-dev@xxxxxxxxxxx>
cc
Subject	[platform-swt-dev] How to create a Path using PathData ?

Hi all,
the org.eclipse.swt.graphics.Path has a method called getPathData()
returning "a device independent representation" of the path.
Unfortunatly
there is no setPathData() method. I've tried something like this to create
a
Path using the PathData.points and PathData.types arrays :

 public void loadPath(Path path,float[] points,byte[] types) {
  int j=0;
  for (int i=0; i<types.length; i++) {
   float x,y,x2,y2,x3,y3;

   switch (types[i]) {
   case SWT.PATH_MOVE_TO:
    x = points[j++];
    y = points[j++];
    path.moveTo(x,y);
    break;
   case SWT.PATH_LINE_TO:
    x = points[j++];
    y = points[j++];
    path.moveTo(x,y);
    break;
   case SWT.PATH_CUBIC_TO:
    x = points[j++];
    y = points[j++];
    x2 = points[j++];
    y2 = points[j++];
    x3 = points[j++];
    y3 = points[j++];
    path.cubicTo(x,y,x2,y2,x3,y3);
    break;
   case SWT.PATH_QUAD_TO:  // never used ???
    x = points[j++];
    y = points[j++];
    x2 = points[j++];
    y2 = points[j++];
    path.quadTo(x,y,x2,y2);
    break;
   case SWT.PATH_CLOSE:
    path.close();
    break;
   default:
    break;
   }
  }
 }

To test this method I do simply the following:
    Path path= new Path(null);
    Font font =new Font(null,"times",40,0);
    path.addString("ZABCD",50,50,font);
    Path path2= new Path(null);
    loadPath(path2,path.getPathData().points,path.getPathData().types);
    gc.drawPath(path2);

And the result is : BCD characters are well rendered but non Z and A !
 (In
fact using another font only C remains correct !)
What's wrong with my loadPath() method ? Perhaps something's wrong with
the
"PATH_CLOSE" and subpaths ? Or is there a known bug ?

Thanks
Thomas



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