grafana/public/app/plugins/panel/graph/thresholds_form.html

<div class="gf-form-group">
  <p class="muted" ng-show="ctrl.disabled">
    Visual thresholds options <strong>disabled.</strong> Visit the Alert tab to update your thresholds.<br />
    To re-enable thresholds, the alert rule must be deleted from this panel.
  </p>
  <div ng-class="{'thresholds-form-disabled': ctrl.disabled}">
    <div class="gf-form-inline" ng-repeat="threshold in ctrl.panel.thresholds">
      <div class="gf-form">
        <label class="gf-form-label">T{{$index+1}}</label>
      </div>

      <div class="gf-form">
        <div class="gf-form-select-wrapper">
          <select
            class="gf-form-input"
            ng-model="threshold.op"
            ng-options="f for f in ['gt', 'lt']"
            ng-change="ctrl.render()"
            ng-disabled="ctrl.disabled"
          ></select>
        </div>
        <input
          type="number"
          ng-model="threshold.value"
          class="gf-form-input width-8"
          ng-change="ctrl.render()"
          placeholder="value"
          ng-disabled="ctrl.disabled"
        />
      </div>

      <div class="gf-form">
        <label class="gf-form-label">Color</label>
        <div class="gf-form-select-wrapper">
          <select
            class="gf-form-input"
            ng-model="threshold.colorMode"
            ng-options="f for f in ['custom', 'critical', 'warning', 'ok']"
            ng-change="ctrl.onThresholdTypeChange($index)"
            ng-disabled="ctrl.disabled"
          >
          </select>
        </div>
      </div>

      <gf-form-switch
        class="gf-form"
        label="Fill"
        checked="threshold.fill"
        on-change="ctrl.render()"
        ng-disabled="ctrl.disabled"
      ></gf-form-switch>

      <div class="gf-form" ng-if="threshold.fill && threshold.colorMode === 'custom'">
        <label class="gf-form-label">Fill color</label>
        <span class="gf-form-label">
          <color-picker color="threshold.fillColor" on-change="ctrl.onFillColorChange($index)"></color-picker>
        </span>
      </div>

      <gf-form-switch
        class="gf-form"
        label="Line"
        checked="threshold.line"
        on-change="ctrl.render()"
        ng-disabled="ctrl.disabled"
      ></gf-form-switch>

      <div class="gf-form" ng-if="threshold.line && threshold.colorMode === 'custom'">
        <label class="gf-form-label">Line color</label>
        <span class="gf-form-label">
          <color-picker color="threshold.lineColor" on-change="ctrl.onLineColorChange($index)"></color-picker>
        </span>
      </div>

      <div class="gf-form">
        <label class="gf-form-label">Y-Axis</label>
        <div class="gf-form-select-wrapper">
          <select
            class="gf-form-input"
            ng-model="threshold.yaxis"
            ng-init="threshold.yaxis = threshold.yaxis === 'left' || threshold.yaxis === 'right' ? threshold.yaxis : 'left'"
            ng-options="f for f in ['left', 'right']"
            ng-change="ctrl.render()"
            ng-disabled="ctrl.disabled"
          >
          </select>
        </div>
      </div>

      <div class="gf-form">
        <label class="gf-form-label">
          <a class="pointer" ng-click="ctrl.removeThreshold($index)" ng-disabled="ctrl.disabled">
            <icon name="'trash-alt'"></icon>
          </a>
        </label>
      </div>
    </div>

    <div class="gf-form-button-row">
      <button class="btn btn-inverse" ng-click="ctrl.addThreshold()" ng-disabled="ctrl.disabled">
        <icon name="'plus'"></icon>&nbsp;Add threshold
      </button>
    </div>
  </div>
</div>