Show text on already used channels

src/AutoPilotPlugins/PX4/FlightModesComponent.qml

@@ -42,9 +42,11 @@ QGCView {
 
     // User visible strings
 
-    readonly property string topHelpText:               "Assign Flight Modes to radio control channels and adjust the thresholds for triggering them. " +
+    property string topHelpText:                        "Assign Flight Modes to radio control channels and adjust the thresholds for triggering them. " +
                                                         "You can assign multiple flight modes to a single channel. " +
-                                                        "Turn your radio control on to test switch settings."
+                                                        "Turn your radio control on to test switch settings. " +
+                                                        "The following channels: " + controller.reservedChannels +
+                                                        " are not available for Flight Modes since they are already in use for other functions."
 
 
     readonly property string fwManualModeName:          "Manual/Main"

src/AutoPilotPlugins/PX4/FlightModesComponentController.cc

@@ -141,6 +141,17 @@ void FlightModesComponentController::_init(void)
         }
     }
     
+    // Setup reserved channels string for ui
+    
+    bool first = true;
+    foreach (int usedChannel, usedChannels) {
+        if (!first) {
+            _reservedChannels += ", ";
+        }
+        _reservedChannels += QString("%1").arg(usedChannel);
+        first = false;
+    }
+    
     _recalcModeRows();
 }
 

src/AutoPilotPlugins/PX4/FlightModesComponentController.h

@@ -51,6 +51,8 @@ public:
     Q_PROPERTY(int channelCount MEMBER _channelCount CONSTANT)
     Q_PROPERTY(bool fixedWing MEMBER _fixedWing CONSTANT)
     
+    Q_PROPERTY(QString reservedChannels MEMBER _reservedChannels CONSTANT)
+    
     Q_PROPERTY(int assistModeRow    MEMBER _assistModeRow   NOTIFY modeRowsChanged)
     Q_PROPERTY(int autoModeRow      MEMBER _autoModeRow     NOTIFY modeRowsChanged)
     Q_PROPERTY(int acroModeRow      MEMBER _acroModeRow     NOTIFY modeRowsChanged)
@@ -214,6 +216,7 @@ private:
     bool    _validConfiguration;
     QString _configurationErrors;
     int     _channelCount;
+    QString _reservedChannels;
 
     int _assistModeRow;
     int _autoModeRow;