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From Josep María Formentí <jmforme...@aia.ptv.es>
Subject Problem to display SVGs
Date Thu, 06 Mar 2003 20:20:51 GMT

Hello!

I'm using Batik and it's very useful. Now, I have a problem and I don't find
the mistake.
I'm trying to put many SVG in a java.swing.JTabbedPane where every tab
contain a SVG. When SVG are big, SVG are'nt displayed.

This is the function where I create a SVG:

	public SVGDocument generaGraficoSVG() {
		int number_elements=101;
		DOMImplementation impl =
SVGDOMImplementation.getDOMImplementation();
		String svgNS = SVGDOMImplementation.SVG_NAMESPACE_URI;
		SVGDocument doc = (SVGDocument)impl.createDocument(svgNS,
"svg", null);

		// obtenemos el elemento raiz (svg)
		Element svgRoot = doc.getDocumentElement();

		Element script = doc.createElement("script");
		script.setAttributeNS(null,"type","text/ecmascript");
		Text txt = doc.createTextNode("function showDialog(msg) {
alert(msg); }");
		script.appendChild(txt);
		svgRoot.appendChild(script);

		//creamos lineas de separación entre subestaciones
		Element grup_lineas = doc.createElementNS(svgNS, "g");
		grup_lineas.setAttributeNS(null, "id", "lineas_subs");

		int space=0;
		for(int i=0;i<number_elements;i++) {
			Element linea = doc.createElementNS(svgNS, "line");
	
linea.setAttributeNS(null,"x1",String.valueOf(space));
			linea.setAttributeNS(null,"y1","0");
	
linea.setAttributeNS(null,"x2",String.valueOf(space));
			linea.setAttributeNS(null,"y2","300");
			linea.setAttributeNS(null,"stroke","black");
			grup_lineas.appendChild(linea);
			Element linea_valor = doc.createElementNS(svgNS,
"line");
	
linea_valor.setAttributeNS(null,"x1",String.valueOf(space+25));
			linea_valor.setAttributeNS(null,"y1","50");
	
linea_valor.setAttributeNS(null,"x2",String.valueOf(space+25));
			linea_valor.setAttributeNS(null,"y2","300");
			linea_valor.setAttributeNS(null,"stroke","red");
	
linea_valor.setAttributeNS(null,"style","stroke-width:5");
	
linea_valor.setAttributeNS(null,"onclick","showDialog('"+i+"')");
			grup_lineas.appendChild(linea_valor);

			space+=50;
		}
		svgRoot.appendChild(grup_lineas);

		// asignamos atributos a elemento raiz
		svgRoot.setAttributeNS(null, "width",
String.valueOf(space));
		svgRoot.setAttributeNS(null, "height", "300");
		
		return doc;
	}

if number_elements is 11, for example, then the program works. This is the
function where I put every SVG in a tab (where there is a JSVGCanvas in
every tab):

	public void dibujaReports(ListaReportsGraficos lista_reports) {
		LinkedList reports=lista_reports.getReports();
		ReportGrafico report;

		try {
			for (Iterator i=reports.iterator();i.hasNext();) {
				report=(ReportGrafico)i.next();
				JSVGCanvas svgCanvas = new JSVGCanvas();
	
svgCanvas.setSVGDocument(report.generaGraficoSVG());
				JScrollPane sc=new JScrollPane(svgCanvas);
				etiquetas_reports.addTab(
report.getNombre(),null,sc,"" );
			}
		} catch (Exception e) {
			System.out.println(e.getMessage());
		}
	}

	where etiquetas_reports is a java.swing.JTabbedPane

It doesn't catch any exception.

I have another problem. The function showDialog in SVG doesn't work. When
you click on a line appears:

scripting error: "showDialog" is not defined.

Could you help me?

Thanks a lot.
Josep Mª


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