gistfile1.txt

               <% preview_width, preview_height = proof_file.large.get_version_dimensions %>
               <% original_width, original_height = proof_file.original.get_version_dimensions %>
               
               <%= javascript_tag %Q[
                 function activate_#{proof_file.object_id}() {
                   // set the 'master' and 'preview' images to be cropped
                   $('#cropbox').attr('src', '#{proof_file.large.url}');
                   $('#preview').attr('src', '#{proof_file.large.url}');


                   // update the width of the preview pane per the selected size
                   $("#preview_div").css('width', 300 * current_aspect_ratio('#{size_dom_id}'));

                   // destroy the old cropper
                   if(typeof jcrop_api != 'undefined') {
                     jcrop_api.destroy();
                   }

                   // create a new cropper
                   var dims = new Array();
                   dims[0] = #{original_width};
                   dims[1] = #{original_height};
                   
                   var aspect_ratio = current_aspect_ratio('#{size_dom_id}');

                   // need to set the appropriate horizontal/vertical crop option
                   if (aspect_ratio == 1) {
                     $('#vertical').attr('checked', 'checked');
                   } else {
                     $('#horizontal').attr('checked', 'checked');
                   }
                   current_proof_cropper = new ProofCropper(aspect_ratio, dims);
                 }
               ] %>