[jboss-user] [JBoss Seam] - Re: Request for PDF p:element tag

[dustismo]

Norman,

Many thanks for implementing this.  Unfortunately it doesn't work for my purpose.  I forgot that I needed access to the DocWriter in order to draw the graph onto the pdf.  The element tag may end up being useful for other purposes though.

I extended ITextComponent to create a simple tag to renderer JFreeCharts.  Possibly someone will find it useful. 


  | public class PdfGraph extends ITextComponent {
  | 
  | 	JFreeChart graph = null;
  | 	Element element = null;
  |     float  height;
  |     float  width;
  |     
  | 	/**
  | 	 * 
  | 	 */
  | 	public PdfGraph() {
  | 		
  | 	}
  | 
  | 	public void setValue(JFreeChart graph) {
  |         this.graph = graph;
  |     }
  | 	
  | 	/* (non-Javadoc)
  | 	 * @see org.jboss.seam.pdf.ui.ITextComponent#createITextObject(javax.faces.context.FacesContext)
  | 	 */
  | 	@Override
  | 	public void createITextObject(FacesContext context) {
  | 		graph = (JFreeChart) valueBinding(context, "value", graph);
  | 		height = (Float) valueBinding(context, "height", height);
  | 	    width = (Float) valueBinding(context, "width", width);
  | 	    
  | 	    UIDocument doc = (UIDocument)this.findITextParent(this, UIDocument.class);
  | 		DocWriter writer = doc.getWriter();
  | 
  | 		if (writer instanceof PdfWriter) {
  | 			try {
  | 				PdfContentByte cb = ((PdfWriter)writer).getDirectContent();
  | 				PdfTemplate tp = cb.createTemplate(width, height);
  | 				Graphics2D g2d = tp.createGraphics(width, height, new DefaultFontMapper());
  | 				Rectangle2D r2d = new Rectangle2D.Double(0, 0, width, height);
  | 				this.graph.draw(g2d, r2d);
  | 				g2d.dispose();	
  | 				this.element = new ImgTemplate(tp);
  | 			} catch (Exception x) {
  | 				x.printStackTrace();
  | 			}
  | 		}
  | 	}
  | 
  | 
  | 	/* (non-Javadoc)
  | 	 * @see org.jboss.seam.pdf.ui.ITextComponent#getITextObject()
  | 	 */
  | 	@Override
  | 	public Object getITextObject() {
  | 		return element;
  | 	}
  | 
  | 	/* (non-Javadoc)
  | 	 * @see org.jboss.seam.pdf.ui.ITextComponent#handleAdd(java.lang.Object)
  | 	 */
  | 	@Override
  | 	public void handleAdd(Object arg0) {
  | 		throw new RuntimeException("No children allowed");
  | 	}
  | 
  | 	/* (non-Javadoc)
  | 	 * @see org.jboss.seam.pdf.ui.ITextComponent#removeITextObject()
  | 	 */
  | 	@Override
  | 	public void removeITextObject() {
  | 		element = null;
  | 	}
  | 
  | 	public float getHeight() {
  | 		return this.height;
  | 	}
  | 
  | 	public void setHeight(float height) {
  | 		this.height = height;
  | 	}
  | 
  | 	public float getWidth() {
  | 		return this.width;
  | 	}
  | 
  | 	public void setWidth(float width) {
  | 		this.width = width;
  | 	}
  | 
  | }

thanks,
Dustin

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