Re: Drag and drop

[fransemail]

Thanks Andres Toussaint! I'm not able and I've use your suggests without 
result. Please check this source code, it's my implementation of DnD.

public class DnD {
       .......
   SketchPanel svgCanvas = new SketchPanel(); // A class that extends 
JSVGCanvas whit a method to draw a selection box
   Window window;
   Document document;  // current document
   protected SVGOMElement svgRoot; // root element
   protected SVGOMElement svgCurrentElement; //selected element

   public JComponent createComponents() {
       .......
       // Set the JSVGCanvas listeners.
       svgCanvas.addSVGDocumentLoaderListener(new 
SVGDocumentLoaderAdapter() {
           public void documentLoadingStarted(SVGDocumentLoaderEvent e) {
               label.setText("Document Loading...");
           }
           public void documentLoadingCompleted(SVGDocumentLoaderEvent e) {
               label.setText("Document Loaded.");
           }
       });

       svgCanvas.addGVTTreeBuilderListener(new GVTTreeBuilderAdapter() {
           public void gvtBuildStarted(GVTTreeBuilderEvent e) {
           }
           public void gvtBuildCompleted(GVTTreeBuilderEvent e) {
               label.setText("Build Done.");                              
               
svgCanvas.setMySize((Dimension)svgCanvas.getSVGDocumentSize());              

               frame.setSize((Dimension)svgCanvas.getSVGDocumentSize());
               frame.pack();
           }
       });
       svgCanvas.addGVTTreeRendererListener(new GVTTreeRendererAdapter() {
           public void gvtRenderingPrepare(GVTTreeRendererEvent e) {
               label.setText("Rendering Started...");
           }
           public void gvtRenderingCompleted(GVTTreeRendererEvent e) {
               label.setText("");
           }
       });
       svgCanvas.setDocumentState(JSVGCanvas.ALWAYS_DYNAMIC);
       svgCanvas.addSVGLoadEventDispatcherListener
           (new SVGLoadEventDispatcherAdapter() {
                   public void svgLoadEventDispatchStarted
                       (SVGLoadEventDispatcherEvent e) {
                       document = svgCanvas.getSVGDocument();
                       svgCanvas.setSVGRoot();
                       window = svgCanvas.getUpdateManager().  // 
Window window
                       getScriptingEnvironment().createWindow();
                       registerListeners();
                   }
               });
           ...........
   }

   public void registerListeners() {
       // Gets an element from the loaded document.
       svgRoot = (SVGOMElement)svgCanvas.getSVGDocument().getRootElement();
       EventTarget root = (EventTarget)svgRoot;
       // Adds a 'onmousedown' listener
       root.addEventListener( SVGConstants.SVG_MOUSEDOWN_EVENT_TYPE , 
new OnNewClickAction(), false);
  }

   public void removeListeners() {
       // Gets an element from the loaded document.
       svgRoot = (SVGOMElement)svgCanvas.getSVGDocument().getRootElement();
       EventTarget root = (EventTarget)svgRoot;
       // remove listener
       root.removeEventListener( SVGConstants.SVG_MOUSEDOWN_EVENT_TYPE 
, new OnDownAction(), false);
  }   

   public void registerListeners(EventTarget aTarget) {
       aTarget.addEventListener( SVGConstants.SVG_MOUSEDOWN_EVENT_TYPE 
, new OnDownAction(), false);
       aTarget.addEventListener( SVGConstants.SVG_MOUSEUP_EVENT_TYPE , 
new OnUpAction(), false);
       aTarget.addEventListener( SVGConstants.SVG_MOUSEMOVE_EVENT_TYPE 
, new OnMoveAction(), false);
  }

   public void removeListeners(EventTarget aTarget) {
       aTarget.removeEventListener( 
SVGConstants.SVG_MOUSEDOWN_EVENT_TYPE , new OnDownAction(), false);
       aTarget.removeEventListener( SVGConstants.SVG_MOUSEUP_EVENT_TYPE 
, new OnUpAction(), false);
       aTarget.removeEventListener( 
SVGConstants.SVG_MOUSEMOVE_EVENT_TYPE , new OnMoveAction(), false);
  }
  
public class OnMoveAction implements EventListener {
    public void handleEvent(Event evt) {
           DOMMouseEvent q = (DOMMouseEvent)evt;        
        if(selected){
            NamedNodeMap map = node.getAttributes();
            //place it so that the mouse-pointer is in the center of 
the object
            SVGOMElement svgCurrentElement = (SVGOMElement)target;
            SVGContext context = svgCurrentElement.getSVGContext();
            Rectangle2D box2D = context.getBBox();
            int height = (int)box2D.getX();
            int width = (int)box2D.getY();
           
            AffineTransform AT = new AffineTransform();
            
AT.translate((double)(q.getClientX()-width/2),(double)(q.getClientY()-height/2));
            SVGGraphicsElement rect = 
(SVGGraphicsElement)svgCurrentElement;
            context.setScreenTransform( AT );
        }
    }
}   
  
   public class OnDownAction implements EventListener {
       public void handleEvent(Event evt) {
           DOMMouseEvent q = (DOMMouseEvent)evt;
           target = q.getTarget();
           removeListeners();
           registerListeners(target);
           node = (Node)target;
           selected = true;   
       }
   }

   public class OnUpAction implements EventListener {
       public void handleEvent(Event evt) {   
           removeListeners(target);
           registerListeners();
           target = null;
           selected = false;    }
   }
  
}


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