title: How to create dynamic panel layout for this logo creation wizard?
body: <p>I want to create a wizard for the logo badge below with 3 parameters. I can make the title dynamic but for image and gradient it's hardcoded because I can't see how to make them dynamic. Code follows after pictures:</p>
  
  <p><a href="http://reboltutorial.com/bugs/wizard1.png" rel="nofollow noreferrer">alt text http://reboltutorial.com/bugs/wizard1.png</a></p>
  
  <p><a href="http://reboltutorial.com/bugs/wizard2.png" rel="nofollow noreferrer">alt text http://reboltutorial.com/bugs/wizard2.png</a></p>
  
  <pre><code>custom-styles: stylize [
    lab: label  60x20 right bold middle font-size 11
    btn: button 64x20 font-size 11 edge [size: 1x1]
    fld: field  200x20 font-size 11 middle edge [size: 1x1]
    inf: info   font-size 11 middle edge [size: 1x1]
    ari: field wrap font-size 11 edge [size: 1x1] with [flags: [field tabbed]]
  ]
  
  panel1: layout/size [
  
      origin 0 space 2x2 across
          styles custom-styles
      h3 "Parameters" font-size 14 return 
      lab "Title" fld_title: fld "EXPERIMENT" return 
      lab "Logo" fld_logo: fld "http://www.rebol.com/graphics/reb-logo.gif" return 
      lab "Gradient" fld_gradient: fld "5 55 5 10 10 71.0.6 30.10.10 71.0.6"
  ] 278x170
  
  panel2: layout/size [
      ;layout (window client area) size is 278x170 at the end of the spec block
      at 0x0 ;put the banner on the top left corner
      box 278x170 effect [ ; default box face size is 100x100
        draw [
          anti-alias on
          line-width 2.5 ; number of pixels in width of the border
          pen black      ; color of the edge of the next draw element
  
          fill-pen radial 100x50 5 55 5 10 10 71.0.6 30.10.10 71.0.6
  
          ; the draw element
          box     ; another box drawn as an effect
            15     ; size of rounding in pixels
            0x0 ; upper left corner
            278x170 ; lower right corner
        ]
      ]
      pad 30x-150
      Text fld_title/text font [name: "Impact" size: 24 color: white]
      image http://www.rebol.com/graphics/reb-logo.gif
  ] 278x170
  
  main: layout [
      vh2 "Logo Badge Wizard"
      guide
      pad 20
      button "Parameters" [panels/pane: panel1  show panels ]
      button "Rendering" [show panel2 panels/pane: panel2  show panels]
      button "Quit" [Unview]
      return
      box 2x170 maroon
      return
      panels: box 278x170
  ]
  
  panel1/offset: 0x0
  panel2/offset: 0x0
  
  panels/pane: panel1
  
  view main
  </code></pre>