Fixed crash when switching to the Flight Modes panel.

src/AutoPilotPlugins/PX4/FlightModesComponent.cc

 /*=====================================================================
- 
+
  QGroundControl Open Source Ground Control Station
- 
+
  (c) 2009 - 2014 QGROUNDCONTROL PROJECT <http://www.qgroundcontrol.org>
- 
+
  This file is part of the QGROUNDCONTROL project
- 
+
  QGROUNDCONTROL is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation, either version 3 of the License, or
  (at your option) any later version.
- 
+
  QGROUNDCONTROL is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.
- 
+
  You should have received a copy of the GNU General Public License
  along with QGROUNDCONTROL. If not, see <http://www.gnu.org/licenses/>.
- 
+
  ======================================================================*/
 
 /// @file
@@ -107,8 +107,10 @@ QString FlightModesComponent::prerequisiteSetup(void) const
             return plugin->airframeComponent()->name();
         } else if (!plugin->radioComponent()->setupComplete()) {
             return plugin->radioComponent()->name();
+        } else if (!plugin->sensorsComponent()->setupComplete()) {
+            return plugin->sensorsComponent()->name();
         }
     }
-    
+
     return QString();
 }

src/AutoPilotPlugins/PX4/PX4AutoPilotPlugin.cc

 /*=====================================================================
- 
+
  QGroundControl Open Source Ground Control Station
- 
+
  (c) 2009 - 2014 QGROUNDCONTROL PROJECT <http://www.qgroundcontrol.org>
- 
+
  This file is part of the QGROUNDCONTROL project
- 
+
  QGROUNDCONTROL is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation, either version 3 of the License, or
  (at your option) any later version.
- 
+
  QGROUNDCONTROL is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.
- 
+
  You should have received a copy of the GNU General Public License
  along with QGROUNDCONTROL. If not, see <http://www.gnu.org/licenses/>.
- 
+
  ======================================================================*/
 
 #include "PX4AutoPilotPlugin.h"
@@ -44,7 +44,7 @@ enum PX4_CUSTOM_MAIN_MODE {
     PX4_CUSTOM_MAIN_MODE_OFFBOARD,
     PX4_CUSTOM_MAIN_MODE_STABILIZED,
     PX4_CUSTOM_MAIN_MODE_RATTITUDE
-    
+
 };
 
 enum PX4_CUSTOM_SUB_MODE_AUTO {
@@ -80,10 +80,10 @@ PX4AutoPilotPlugin::PX4AutoPilotPlugin(Vehicle* vehicle, QObject* parent) :
     _incorrectParameterVersion(false)
 {
     Q_ASSERT(vehicle);
-    
+
     _airframeFacts = new PX4AirframeLoader(this, _vehicle->uas(), this);
     Q_CHECK_PTR(_airframeFacts);
-    
+
     PX4AirframeLoader::loadAirframeMetaData();
 }
 
@@ -96,28 +96,28 @@ const QVariantList& PX4AutoPilotPlugin::vehicleComponents(void)
 {
     if (_components.count() == 0 && !_incorrectParameterVersion) {
         Q_ASSERT(_vehicle);
-        
+
         if (parametersReady()) {
             _airframeComponent = new AirframeComponent(_vehicle, this);
             _airframeComponent->setupTriggerSignals();
             _components.append(QVariant::fromValue((VehicleComponent*)_airframeComponent));
-            
+
             _radioComponent = new PX4RadioComponent(_vehicle, this);
             _radioComponent->setupTriggerSignals();
             _components.append(QVariant::fromValue((VehicleComponent*)_radioComponent));
 
-            _flightModesComponent = new FlightModesComponent(_vehicle, this);
-            _flightModesComponent->setupTriggerSignals();
-            _components.append(QVariant::fromValue((VehicleComponent*)_flightModesComponent));
-            
             _sensorsComponent = new SensorsComponent(_vehicle, this);
             _sensorsComponent->setupTriggerSignals();
             _components.append(QVariant::fromValue((VehicleComponent*)_sensorsComponent));
-            
+
+            _flightModesComponent = new FlightModesComponent(_vehicle, this);
+            _flightModesComponent->setupTriggerSignals();
+            _components.append(QVariant::fromValue((VehicleComponent*)_flightModesComponent));
+
             _powerComponent = new PowerComponent(_vehicle, this);
             _powerComponent->setupTriggerSignals();
             _components.append(QVariant::fromValue((VehicleComponent*)_powerComponent));
-            
+
             _safetyComponent = new SafetyComponent(_vehicle, this);
             _safetyComponent->setupTriggerSignals();
             _components.append(QVariant::fromValue((VehicleComponent*)_safetyComponent));
@@ -136,7 +136,7 @@ const QVariantList& PX4AutoPilotPlugin::vehicleComponents(void)
             qWarning() << "Call to vehicleCompenents prior to parametersReady";
         }
     }
-    
+
     return _components;
 }
 
@@ -150,8 +150,8 @@ void PX4AutoPilotPlugin::_parametersReadyPreChecks(bool missingParameters)
         _incorrectParameterVersion = true;
         qgcApp()->showMessage("This version of GroundControl can only perform vehicle setup on a newer version of firmware. "
                               "Please perform a Firmware Upgrade if you wish to use Vehicle Setup.");
-	}
-	
+    }
+
     _parametersReady = true;
     _missingParameters = missingParameters;
     emit missingParametersChanged(_missingParameters);

src/AutoPilotPlugins/PX4/PX4SimpleFlightModesController.cc

 /*=====================================================================
- 
+
  QGroundControl Open Source Ground Control Station
- 
+
  (c) 2009, 2015 QGROUNDCONTROL PROJECT <http://www.qgroundcontrol.org>
- 
+
  This file is part of the QGROUNDCONTROL project
- 
+
  QGROUNDCONTROL is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation, either version 3 of the License, or
  (at your option) any later version.
- 
+
  QGROUNDCONTROL is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.
- 
+
  You should have received a copy of the GNU General Public License
  along with QGROUNDCONTROL. If not, see <http://www.gnu.org/licenses/>.
- 
+
  ======================================================================*/
 
 #include "PX4SimpleFlightModesController.h"
@@ -53,9 +53,21 @@ void PX4SimpleFlightModesController::_rcChannelsChanged(int channelCount, int pw
     }
     emit rcChannelValuesChanged();
 
-    int flightModeChannel = getParameterFact(-1, "RC_MAP_FLTMODE")->rawValue().toInt() - 1;
+    Fact* pFact = getParameterFact(-1, "RC_MAP_FLTMODE");
+    if(!pFact) {
+        qCritical() << "RC_MAP_FLTMODE Fact is NULL in" << __func__ << __FILE__ << __LINE__;
+        return;
+    }
+
+    int flightModeChannel = pFact->rawValue().toInt() - 1;
+
+    pFact = getParameterFact(-1, QString("RC%1_REV").arg(flightModeChannel + 1));
+    if(!pFact) {
+        qCritical() << QString("RC%1_REV").arg(flightModeChannel + 1) << "is NULL in" << __func__ << __FILE__ << __LINE__;
+        return;
+    }
 
-    int flightModeReversed = getParameterFact(1, QString("RC%1_REV").arg(flightModeChannel + 1))->rawValue().toInt();
+    int flightModeReversed = pFact->rawValue().toInt();
 
     if (flightModeChannel < 0 || flightModeChannel > channelCount) {
         return;