Never mind. Been sitting with this problem for two days, but of course I only discover the problem a few minutes after asking the people here... The problem was caused by calling: canvas.getSVGDocument().importNode((Node)tc.getTarget().element, true); This seems to clone the entire tree (once again), causing me to insert a third clone on the canvas, but then referencing the second clone in all the other code. Since the second clone wasn't on the canvas, it of course had no AffineTransform. The fun thing about programming: Nobody has to punish the ignorant programmer. Ignorance seems to be punished automatically :)
-----Original Message----- From: Henric Rosvall [mailto:[EMAIL PROTECTED] Sent: den 11 juni 2007 16:20 To: batik-users@xmlgraphics.apache.org Subject: getAffineTransform -> NullPointerException Hi ! I'm trying to implement copy/cut and paste in my application that uses a subclassed JSVGCanvas as a canvas. So when the user tells the app to copy the selected objects (I have code that makes objects selectable, and modifyable in a multitude of ways), I take the selected elements, and clone them along with all the data about them (to ensure that leter modifications to the Element doesn't modify the copied elements). Then when the user selects paste, I clone it all once again (to be able to paste multiple times), and insert the clone-of-the-clone. The new object is drawn like it should, and everything looks like it worked - until I try to select the object. This triggers a call to Element.getTransformToElement(Element), which returns an SVGLocatableSupport-element, just like it should. But when trying to do any Matrix-transformations on the SVGLocatableSupport-object, I get a NullPointerException indicating that the AffineTransform of the Element is null: java.lang.NullPointerException at org.apache.batik.dom.svg.SVGLocatableSupport$4.getAffineTransform(Unknow n Source) at org.apache.batik.dom.svg.AbstractSVGMatrix.inverse(Unknown Source) at printit.svg.JSvgCanvasEnh.drawSelection(JSvgCanvasEnh.java:1146) at printit.controls.toolbars.ToolEventHandler$SelectTool.OnMouseDown(ToolEv entHandler.java:201) at printit.controls.toolbars.ToolEventHandler$MoveTool.OnMouseDown(ToolEven tHandler.java:340) at printit.svg.JSvgCanvasEnh$OnMouseDownAction.handleEvent(JSvgCanvasEnh.ja va:4345) at org.apache.batik.dom.events.EventSupport.fireEventListeners(Unknown Source) at org.apache.batik.dom.events.EventSupport.dispatchEvent(Unknown Source) at org.apache.batik.dom.AbstractNode.dispatchEvent(Unknown Source) at org.apache.batik.bridge.BridgeEventSupport$Listener.dispatchMouseEvent(U nknown Source) at org.apache.batik.bridge.BridgeEventSupport$Listener.dispatchMouseEvent(U nknown Source) at org.apache.batik.bridge.BridgeEventSupport$Listener.mousePressed(Unknown Source) at org.apache.batik.gvt.event.AWTEventDispatcher.processMouseEvent(Unknown Source) at org.apache.batik.gvt.event.AWTEventDispatcher.dispatchMouseEvent(Unknown Source) at org.apache.batik.gvt.event.AWTEventDispatcher.dispatchEvent(Unknown Source) at org.apache.batik.gvt.event.AWTEventDispatcher.mousePressed(Unknown Source) at org.apache.batik.swing.svg.JSVGComponent$18.run(Unknown Source) at org.apache.batik.util.RunnableQueue.run(Unknown Source) at java.lang.Thread.run(Unknown Source) Any idea what might be causing this? I use Element.cloneNode(true); to clone the original Element I've checked so that every object in the chain of things that should get cloned, is really cloned. There are no references left pointing to anything but cloned objects. The clones are inserted in much the same way as the original objects, with basically identical code. Only difference is that the original objects getAffineTransform works, but the cloned ones don't. Regards Henric Rosvall
