title: dojox.drawing.Drawing - custom tool to create rectangle with rounded corners
body: <p>I'm working with dojox.drawing.Drawing to create a simple diagramming tool. I have created a custom tool to draw rounded rectangle by extending dojox.drawing.tools.Rect as shown below -</p>
  
  <pre><code>dojo.provide("dojox.drawing.tools.custom.RoundedRect");
  dojo.require("dojox.drawing.tools.Rect");
  
  dojox.drawing.tools.custom.RoundedRect = dojox.drawing.util.oo.declare(
  
          dojox.drawing.tools.Rect,
          function(options){
          },
          {
            customType:"roundedrect"
          }    
  );
  
  dojox.drawing.tools.custom.RoundedRect.setup = {
      name:"dojox.drawing.tools.custom.RoundedRect",
      tooltip:"Rounded Rect",
      iconClass:"iconRounded"
  };
  dojox.drawing.register(dojox.drawing.tools.custom.RoundedRect.setup, "tool");
  </code></pre>
  
  <p>I was able to add my tool to the toolbar and use it to draw a rectagle on canvas. Now, I would like to customize the rectangle created by my custom tool to have rounded corners, but I'm not able to figure out how. 
  I have checked the source of dojox.drawing.tools.Rect class as well as it's parent dojox.drawing.stencil.Rect class and I can see the actual rectangle being created in dojox.drawing.stencil.Rect as follows - </p>
  
  <pre><code>_create: function(/*String*/shp, /*StencilData*/d, /*Object*/sty){
          // summary:
          //              Creates a dojox.gfx.shape based on passed arguments.
          //              Can be called many times by implementation to create
          //              multiple shapes in one stencil.
          //
          //console.log("render rect", d)
          //console.log("rect sty:", sty)
          this.remove(this[shp]);
          this[shp] = this.container.createRect(d)
                  .setStroke(sty)
                  .setFill(sty.fill);
  
          this._setNodeAtts(this[shp]);
  }
  </code></pre>
  
  <p>In dojox.gfx, rounded corners can be added to a a rectangle by setting r property. 
  With this context, could anybody please provide answers to my following questions?</p>
  
  <ol>
  <li>What's the mechanism in dojox.drawing to customize the appearance of rectangle to have
  rounded corners?</li>
  <li>In the code snippet above, StencilData is passed to createRect call. What's the mechanism to customize this data? Can the r property of a rectangle that governs rounded corners be set in this data?</li>
  </ol>