[Xmlgraphics-batik Wiki] Update of "DragTutorial" by AndresToussaint

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The following page has been changed by AndresToussaint:
http://wiki.apache.org/xmlgraphics-batik/DragTutorial

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          public void handleEvent(Event evt) {
  		//perform select, deselect operations, etc...
  		// i.e. assign or validate that you have a draggable item 
-        // in the "selectedItem" object
+                 // in the "selectedItem" object (And define "thisNode" element)
  		
+ 
+                 //For example, "thisNode" can be:
+                 SVGLocatable thisNode = (SVGLocatable)evt.getTarget();
+ 
+                 //End of example. The variable thisNode has the element
+                 // that is the draggableItem. It can be a single Element
+                 // or a G element.  If you are interested in a G element
+                 // you may need a method to locate the desired parent
+                 // of your eventTarget (like parsing the ID attr.) because
+                 // the eventTarget may only be one single element of a
+                 // complex shape, and you want to drag the full complex shape.
+ 
+ 
  		drag = DRAG_DOWN;
  
  		// Set the initial drag point