Adding shapes to Powerpoint slide using XSLF (Apache POI Project) - apache-poi

Question

The apache POI project explains how to read a shape from a powerpoint slide http://poi.apache.org/slideshow/xslf-cookbook.html#GetShapes
However, I can't find any doc on how to add a shape to a powerpoint slide using this part of the library. If I use an old powerpoint format (ppt as opposed to pptx), I can just use the hslf part of the libaray and do:
SlideShow ppt = new SlideShow();
//add first slide
Slide s1 = ppt.createSlide();
// create shapes./
java.awt.geom.GeneralPath path = new java.awt.geom.GeneralPath();
path.moveTo(100, 100);
path.lineTo(200, 100);
path.curveTo(50, 45, 134, 22, 78, 133);
path.curveTo(10, 45, 134, 56, 78, 100);
path.lineTo(100, 200);
path.closePath();
Freeform shape = new Freeform();
shape.setPath(path);
s1.addShape(shape);
//save changes in a file
FileOutputStream out;
try {
out = new FileOutputStream("slideshow.ppt");
ppt.write(out);
out.close();
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException ex) {
e.printStakTrace();
}
How would I do something similar using xlsf part of the library and thus generate a pptx?
Thanks

Answer 1

It's actually quite similar ...
XMLSlideShow ppt = new XMLSlideShow();
XSLFSlide s1 = ppt.createSlide();
// create shapes
java.awt.geom.Path2D.Double path = new java.awt.geom.Path2D.Double();
path.moveTo(100, 100);
path.lineTo(200, 100);
path.curveTo(50, 45, 134, 22, 78, 133);
path.curveTo(10, 45, 134, 56, 78, 100);
path.lineTo(100, 200);
path.closePath();
XSLFFreeformShape shape = s1.createFreeform();
shape.setPath(path);
shape.setLineWidth(1);
shape.setLineColor(Color.BLACK);
//save changes in a file
FileOutputStream out;
try {
out = new FileOutputStream("slideshow.pptx");
ppt.write(out);
out.close();
} catch (Exception ex) {
ex.printStackTrace();
}
For more examples and Graphics2D context you can paint on, have a look on my PptxGraphics2D class.