<section id="textbox_${id}" class="textbox">
  <textarea rows="${rows}" cols="${cols}" name="input_${id}" id="input_${id}"
       % if hidden:
      	    style="display:none;"
       % endif
  >${value|h}</textarea>

  <div class="grader-status">
    % if status == 'unsubmitted':
      <span class="unanswered" style="display:inline-block;" id="status_${id}">Unanswered</span>
    % elif status == 'correct':
      <span class="correct" id="status_${id}">Correct</span>
    % elif status == 'incorrect':
      <span class="incorrect" id="status_${id}">Incorrect</span>
    % elif status == 'queued':
      <span class="processing" id="status_${id}">Queued</span>
      <span style="display:none;" class="xqueue" id="${id}" >${queue_len}</span>
    % endif

    % if hidden:
      <div style="display:none;" name="${hidden}" inputid="input_${id}" />
    % endif

    <p class="debug">${status}</p>
  </div>

  <span id="answer_${id}"></span>

  <div class="external-grader-message">
    ${msg|n}
  </div>
  <div class="external-grader-message">
    ${queue_msg|n}
  </div>

  <div class="plot-button">
      <input type="button" class="save" name="plot-button" id="plot_${id}" value="Plot" />
  </div>

  <script>
    // Note: We need to make the area follow the CodeMirror for this to work.
    $(function(){
      var cm = CodeMirror.fromTextArea(document.getElementById("input_${id}"), {
        % if linenumbers == 'true':
        lineNumbers: true,
        % endif
        mode: "matlab",
        matchBrackets: true,
        lineWrapping: true,
        indentUnit: "${tabsize}",
        tabSize: "${tabsize}",
        indentWithTabs: false,
        extraKeys: {
            "Tab": function(cm) {
                cm.replaceSelection("${' '*tabsize}", "end");
            }
        },
        smartIndent: false
      });

      $("#textbox_${id}").find('.CodeMirror-scroll').height(${int(13.5*eval(rows))});

      var gentle_alert = function (parent_elt, msg) {
          if($(parent_elt).find('.capa_alert').length) {
              $(parent_elt).find('.capa_alert').remove();
          }
          var alert_elem = "<div>" + msg + "</div>";
          alert_elem = $(alert_elem).addClass('capa_alert');
          $(parent_elt).find('.action').after(alert_elem);
          $(parent_elt).find('.capa_alert').css({opacity: 0}).animate({opacity: 1}, 700);
      }
      

      // hook up the plot button
      var plot = function(event) {
          var problem_elt = $(event.target).closest('.problems-wrapper');
          url = $(event.target).closest('.problems-wrapper').data('url');
          input_id = "${id}";

          // save the codemirror text to the textarea
          cm.save();
          var input = $("#input_${id}");
          // pull out the coded text
          submission = input.val();

          answer = input.serialize();

          // setup callback for after we send information to plot
          var plot_callback = function(response) {
              if(response.success) {
                  window.location.reload();
              }
              else {
                  gentle_alert(problem_elt, msg);
              }
          }

          var save_callback = function(response) { 
                  if(response.success) {
                      // send information to the problem's plot functionality
                      Problem.inputAjax(url, input_id, 'plot', 
                        {'submission': submission}, plot_callback);
                  }
                  else {
                      gentle_alert(problem_elt, msg);
                  }
          }

          // save the answer
          $.postWithPrefix(url + '/problem_save', answer, save_callback);

      }
      $('#plot_${id}').click(plot);

    });
  </script>
</section>
