Re: SVGOMGElement and coordinates?

[Nazar Stasiv (Lohika, Inc)]

Heres SVG. the elements I identify to have BBox are in bold (parent element g with bpel:activity-label attribute). For reference I attached whole svg file as well.             <g xmlns:bpel="http://www.bpel.com/bpms"                                 style="color-interpolation:auto;color-rendering:auto;fill:red;fill-opacity:1;font-family:sans-serif;font-size:12;font-style:normal;font-weight:normal;image-rendering:auto;shape-rendering:auto;stroke:black;stroke-dasharray:none;stroke-dashoffset:0;stroke-linecap:square;stroke-linejoin:miter;stroke-miterlimit:10;stroke-opacity:1;stroke-width:1;text-rendering:auto"                 bpel:process-id="ID-d4ef0814-bf00-1004-80f8-5c5630e37dfa"                 bpel:activity-label="Event"                 bpel:activity-id="ID-d54cf1dc-bf00-1004-80f8-5c5630e37dfa">                 <g style="fill:white;stroke:white">                     <path style="stroke:none"                         d="M148 347.3505859375 L173 372.3505859375 L148 397.3505859375 L123 372.3505859375 Z" />                     <path style="fill:none;stroke:black"                         d="M148 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0 L25.474609375 0 L25.474609375 -3.78125 Q25.474609375 -4.4375 25.349609375 -4.75 Q25.224609375 -5.0625 24.912109375 -5.2578125 Q24.599609375 -5.453125 24.177734375 -5.453125 Q23.505859375 -5.453125 23.013671875 -5.0234375 Q22.521484375 -4.59375 22.521484375 -3.40625 L22.521484375 0 L21.474609375 0 ZM30.4453125 -0.9375 L30.6015625 -0.015625 Q30.1484375 0.078125 29.8046875 0.078125 Q29.2265625 0.078125 28.9140625 -0.1015625 Q28.6015625 -0.28125 28.46875 -0.578125 Q28.3359375 -0.875 28.3359375 -1.828125 L28.3359375 -5.40625 L27.5703125 -5.40625 L27.5703125 -6.21875 L28.3359375 -6.21875 L28.3359375 -7.765625 L29.3828125 -8.390625 L29.3828125 -6.21875 L30.4453125 -6.21875 L30.4453125 -5.40625 L29.3828125 -5.40625 L29.3828125 -1.765625 Q29.3828125 -1.3125 29.4375 -1.1875 Q29.4921875 -1.0625 29.6171875 -0.984375 Q29.7421875 -0.90625 29.9765625 -0.90625 Q30.1640625 -0.90625 30.4453125 -0.9375 Z" />                 </g>                 <g style="fill:white;stroke:white"                     transform="matrix(1,0,0,1,-30,-50)">                     <path style="stroke:none"                         d="M192.6341552734375 422.3505859375 C192.6341552734375 430.43280029296875 186.08221435546875 436.9847412109375 178 436.9847412109375 C169.91778564453125 436.9847412109375 163.36585998535156 430.43280029296875 163.36585998535156 422.3505859375 C163.36585998535156 414.26837158203125 169.91778564453125 407.7164306640625 178 407.7164306640625 C186.08221435546875 407.7164306640625 192.6341552734375 414.26837158203125 192.6341552734375 422.3505859375 Z" />                 </g>                 <g style="stroke-linecap:butt;stroke-miterlimit:4"                     transform="matrix(1,0,0,1,-30,-50)">                     <path style="fill:none"                         d="M192.6341552734375 422.3505859375 C192.6341552734375 430.43280029296875 186.08221435546875 436.9847412109375 178 436.9847412109375 C169.91778564453125 436.9847412109375 163.36585998535156 430.43280029296875 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transform="matrix(1,0,0,1,-8.213032722473145,-16.072585105895996)">                     <path style="stroke:none"                         d="M156.21302795410156 379.11322021484375 L152.83514404296875 384.0827331542969 L146.92385864257812 384.0827331542969 L149.87950134277344 388.4310607910156 L146.92385864257812 392.7793884277344 L152.83514404296875 392.7793884277344 L156.21302795410156 397.7489013671875 L159.78579711914062 392.7793884277344 L165.50221252441406 392.7793884277344 L162.54656982421875 388.4310607910156 L165.50221252441406 384.0827331542969 L159.59091186523438 384.0827331542969 L156.21302795410156 379.11322021484375 Z" />                 </g>                 <g                     transform="matrix(1,0,0,1,-8.213032722473145,-16.072585105895996)">                     <path style="fill:none"                         d="M156.21302795410156 379.11322021484375 L152.83514404296875 384.0827331542969 L146.92385864257812 384.0827331542969 L149.87950134277344 388.4310607910156 L146.92385864257812 392.7793884277344 L152.83514404296875 392.7793884277344 L156.21302795410156 397.7489013671875 L159.78579711914062 392.7793884277344 L165.50221252441406 392.7793884277344 L162.54656982421875 388.4310607910156 L165.50221252441406 384.0827331542969 L159.59091186523438 384.0827331542969 L156.21302795410156 379.11322021484375 Z" />                 </g>             </g> [EMAIL PROTECTED] wrote: Hi Nazar, "Nazar Stasiv (Lohika, Inc)" <[EMAIL PROTECTED]> wrote on 08/15/2006 06:36:40 AM: Well, that is the way I continued investigation yesterday. The answer I had found was that not every SVGLocatable.getBBox returns valid value. For most of elements it returned null. However some of the elements had reasonable values. Sample output (excerpt) +org.apache.batik.dom.svg.SVGOMGElement +org.apache.batik.dom.svg.SVGOMRectElement +org.apache.batik.dom.svg.SVGOMGElement +org.apache.batik.dom.svg.SVGOMPathElement -org.apache.batik.dom.svg.SVGOMPathElement -org.apache.batik.dom.svg.SVGOMRectElement -org.apache.batik.dom.svg.SVGOMGElement What is the reason that the element has no boundingBox? As I said if the element is not in the rendering tree, because it's in a '<defs>' element or under and element with 'display="none"' or under an element that is not part of the SVG display tree (most often an element from a different namespace). Then it will not have a BBox since it is not in the rendering tree. If you can post a sample SVG document and identify a few of elements that are giving you problems we can probably identify exactly why you aren't getting a BBox. Pepping, Florian wrote: Hi Nazer, mhhh, that's strange. As Thomas said, that's the way it should normally work and my code looks very similiar to yours and it works. Perhaps you can do one more thing. Test, if the node you are looking for is an instance of SVGLocatable [if (node instanceof SVGLocatable) {...}] Only if this is true, you can get the BoundingBox of this element. If this also doesn't work, make a very simple example and test it there first. Perhaps you can get closer to the problem then. Florian -----Original Message----- From: Nazar Stasiv (Lohika, Inc) [mailto:[EMAIL PROTECTED]] Sent: Monday, August 14, 2006 5:47 PM To: batik-users@xmlgraphics.apache.org Subject: Re: SVGOMGElement and coordinates? Florian, I get null here for return value public static SVGRect getSVGRect(SVGLocatable e){ return e.getBBox(); //<-- returns null. } And initialization I do with the code below public static SVGDocument parseSvg(String uri) { UserAgent userAgent = new UserAgentAdapter(); DocumentLoader loader = new DocumentLoader(userAgent); SVGDocument doc; try { doc = (SVGDocument) loader.loadDocument(uri); } catch (Exception e) { e.printStackTrace(); throw new RuntimeException(e); } BridgeContext ctx = new BridgeContext(userAgent, loader); ctx.setDynamicState(BridgeContext.DYNAMIC); GVTBuilder builder = new GVTBuilder(); GraphicsNode rootGN = builder.build(ctx, doc); loader.dispose(); return doc; } Everything goes fine (no exceptions in parseSvg(String)) untill getSVGRect is called. Please help. Pepping, Florian wrote: Hi Nazer, I think I had the same problem some time ago. Before you can use getBBox() you have to build the GVT-Tree in order to get this information. You can do this in the following way: SVGDocument svgDoc = (SVGDocument)loader.loadDocument(file.toURL().toString()); loader.dispose(); BridgeContext ctx = new BridgeContext(userAgent, loader); ctx.setDynamicState(BridgeContext.DYNAMIC); GVTBuilder builder = new GVTBuilder(); builder.build(ctx, svgDoc); // use getBBox() afterwards After this, SVGLocatable.getBBox() shouldn't return null any longer. Florian -----Original Message----- From: Nazar Stasiv (Lohika, Inc) [mailto:[EMAIL PROTECTED]] Sent: Monday, August 14, 2006 3:16 PM To: batik-users@xmlgraphics.apache.org Subject: Re: SVGOMGElement and coordinates? SVGLocatable.getBBox(elem) returns null No javadoc comments are there to unveil the reason of such behaviour Is there the other way to get coordinates of SVGOMGElement ? [EMAIL PROTECTED] wrote: Hi Nazer, "Nazar Stasiv (Lohika, Inc)" <[EMAIL PROTECTED]> wrote on 08/14/2006 07:29:19 AM: I use batik to operate SVG at runtime. The question is how can I get SVGOMGElement coordinates when walking DOM tree of the SVG document? You should look at the SVG DOM. In particular the 'getBBox' method. There are also methods get 'getIntersectionList' that could be useful. The reason I'm asking such a thing it that requirements are to display info popup near named elements of SVG. If I had coordinates of such an element I could use DOM to add new element to the tree with computed coordinates for correct positioning of the info popup. This is typically done with mouse over/out event handlers. This allows you to receive a DOM event when the mouse enters/exits a particular element or group in the SVG document. If you need the sensitive area to be larger than the rendered area you can add a hidden element (visibility="hidden" pointer-events="fill") that can cover the expanded area and tie your event handler to that. --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]