show only configured servos

_locales/en/messages.json

@@ -2548,5 +2548,8 @@
     },
     "confirm_reset_settings": {
         "message": "Do you really want to reset all settings?\nATTENTION: All settings are lost! You have to setup the whole aircraft after this operation!"
+    },
+    "servoTableInfo": {
+        "message": "This table shows only servos configured using servo mixer"
     }
 }

js/servoMixerRuleCollection.js

@@ -58,5 +58,19 @@ var ServoMixerRuleCollection = function () {
         return data.length < self.getServoRulesCount();
     };
 
+    self.isServoConfigured = function(servoId) {
+
+        for (let ruleIndex in data) {
+            if (data.hasOwnProperty(ruleIndex)) {
+                let rule = data[ruleIndex];
+
+                if (rule.getTarget() == servoId && rule.isUsed()) {
+                    return true;
+                }
+            }
+        }
+        return false;
+    }
+
     return self;
 };

tabs/servos.html

@@ -5,6 +5,7 @@
             <a id="button-documentation" href="" target="_blank"></a>
         </div>
         <div>
+            <p data-i18n="servoTableInfo" class="requires-v2_0"></p>
             <!-- <div class="title" data-i18n="servosChangeDirection"></div> -->
             <table id="servo-config-table" class="fields">
                 <tr class="main">

tabs/servos.js

@@ -52,6 +52,9 @@ TABS.servos.initialize = function (callback) {
             servoHeader = '';
 
         if (semver.lt(CONFIG.flightControllerVersion, "2.0.0")) {
+
+            $('.requires-v2_0').hide();
+
             for (i = 0; i < RC.active_channels - 4; i++) {
                 servoHeader = servoHeader + '<th class="short">CH' + (i + 5) + '</th>';
             }
@@ -88,29 +91,36 @@ TABS.servos.initialize = function (callback) {
                 </tr> \
             ');
 
+            let $currentRow = $servoConfigTable.find('tr:last');
+
             //This routine is pre 2.0 only
             if (SERVO_CONFIG[obj].indexOfChannelToForward >= 0) {
-                $servoConfigTable.find('tr:last td.channel input').eq(SERVO_CONFIG[obj].indexOfChannelToForward).prop('checked', true);
+                $currentRow.find('td.channel input').eq(SERVO_CONFIG[obj].indexOfChannelToForward).prop('checked', true);
             }
 
             // adding select box and generating options
-            $servoConfigTable.find('tr:last td.rate').append(
+            $currentRow.find('td.rate').append(
                 '<input class="rate-input" type="number" min="' + FC.MIN_SERVO_RATE + '" max="' + FC.MAX_SERVO_RATE + '" value="' + Math.abs(SERVO_CONFIG[obj].rate) + '" />'
             );
 
-            $servoConfigTable.find('tr:last td.reverse').append(
+            $currentRow.find('td.reverse').append(
                 '<input type="checkbox" class="reverse-input togglemedium" ' + (SERVO_CONFIG[obj].rate < 0 ? ' checked ' :  '') + '/>'
             );
 
-            $servoConfigTable.find('tr:last').data('info', { 'obj': obj });
+            $currentRow.data('info', { 'obj': obj });
 
             if (semver.lt(CONFIG.flightControllerVersion, "2.0.0")) {
                 // only one checkbox for indicating a channel to forward can be selected at a time, perhaps a radio group would be best here.
-                $servoConfigTable.find('tr:last td.channel input').click(function () {
+                $currentRow.find('td.channel input').click(function () {
                     if ($(this).is(':checked')) {
                         $(this).parent().parent().find('.channel input').not($(this)).prop('checked', false);
                     }
                 });
+            } else {
+                //For 2.0 and above hide a row when servo is not configured
+                if (!SERVO_RULES.isServoConfigured(obj)) {
+                    $servoConfigTable.find('tr:last').hide();
+                }
             }
         }