Parameter load errors shown to user

src/AutoPilotPlugins/AutoPilotPlugin.cc

@@ -163,9 +163,9 @@ void AutoPilotPlugin::writeParametersToStream(QTextStream &stream)
 	_getParameterLoader()->writeParametersToStream(stream, _uas->getUASName());
 }
 
-void AutoPilotPlugin::readParametersFromStream(QTextStream &stream)
+QString AutoPilotPlugin::readParametersFromStream(QTextStream &stream)
 {
-	_getParameterLoader()->readParametersFromStream(stream);
+	return _getParameterLoader()->readParametersFromStream(stream);
 }
 
 bool AutoPilotPlugin::armed(void)

src/AutoPilotPlugins/AutoPilotPlugin.h

@@ -89,7 +89,8 @@ public:
 	void writeParametersToStream(QTextStream &stream);
 	
 	/// Reads the parameters from the stream and updates values
-	void readParametersFromStream(QTextStream &stream);
+    /// @return Errors during load. Empty string for no errors
+	QString readParametersFromStream(QTextStream &stream);
 	
     /// Returns true if the specifed fact exists
     Q_INVOKABLE bool factExists(FactSystem::Provider_t  provider,       ///< fact provider

src/FactSystem/ParameterLoader.cc

@@ -579,8 +579,9 @@ void ParameterLoader::_saveToEEPROM(void)
     qCDebug(ParameterLoaderLog) << "_saveToEEPROM";
 }
 
-void ParameterLoader::readParametersFromStream(QTextStream& stream)
+QString ParameterLoader::readParametersFromStream(QTextStream& stream)
 {
+    QString errors;
     bool userWarned = false;
     
     while (!stream.atEnd()) {
@@ -597,7 +598,7 @@ void ParameterLoader::readParametersFromStream(QTextStream& stream)
                                                                                   QGCMessageBox::Ok | QGCMessageBox::Cancel,
                                                                                   QGCMessageBox::Cancel);
                     if (button == QGCMessageBox::Cancel) {
-                        return;
+                        return QString();
                     }
                 }   
                 
@@ -607,18 +608,29 @@ void ParameterLoader::readParametersFromStream(QTextStream& stream)
                 uint    mavType = wpParams.at(4).toUInt();
                 
                 if (!_autopilot->factExists(FactSystem::ParameterProvider, componentId, paramName)) {
+                    QString error;
+                    error = QString("Skipped parameter %1:%2 - does not exist on this vehicle\n").arg(componentId).arg(paramName);
+                    errors += error;
+                    qCDebug(ParameterLoaderLog) << error;
                     continue;
                 }
                 
                 Fact* fact = _autopilot->getFact(FactSystem::ParameterProvider, componentId, paramName);
                 if (fact->type() != _mavTypeToFactType((MAV_PARAM_TYPE)mavType)) {
+                    QString error;
+                    error  = QString("Skipped parameter %1:%2 - type mismatch %3:%4\n").arg(componentId).arg(paramName).arg(fact->type()).arg(_mavTypeToFactType((MAV_PARAM_TYPE)mavType));
+                    errors += error;
+                    qCDebug(ParameterLoaderLog) << error;
                     continue;
                 }
                 
+                qCDebug(ParameterLoaderLog) << "Updating parameter" << componentId << paramName << valStr;
                 fact->setValue(valStr);
             }
         }
     }
+    
+    return errors;
 }
 
 void ParameterLoader::writeParametersToStream(QTextStream &stream, const QString& name)

src/FactSystem/ParameterLoader.h

@@ -80,7 +80,9 @@ public:
     
     const QMap<int, QMap<QString, QStringList> >& getGroupMap(void);
     
-    void readParametersFromStream(QTextStream& stream);
+    /// Returns error messages from loading
+    QString readParametersFromStream(QTextStream& stream);
+    
     void writeParametersToStream(QTextStream &stream, const QString& name);
 
     /// Return the parameter for which the default component id is derived from. Return an empty

src/QmlControls/ParameterEditor.qml

@@ -49,7 +49,14 @@ QGCView {
     readonly property real __rightMargin: 20
     readonly property int __maxParamChars: 16
 
-    ParameterEditorController { id: controller; factPanel: panel }
+    ParameterEditorController {
+        id: controller;
+        factPanel: panel
+
+        onShowErrorMessage: {
+            showMessage("Parameter Load Errors", errorMsg, StandardButton.Ok)
+        }
+    }
 
     Component {
         id: editorDialogComponent

src/QmlControls/ParameterEditorController.cc

@@ -95,6 +95,8 @@ void ParameterEditorController::saveToFile(void)
 
 void ParameterEditorController::loadFromFile(void)
 {
+    QString errors;
+    
     Q_ASSERT(_autopilot);
     
     QString msgTitle("Load Parameters");
@@ -112,8 +114,12 @@ void ParameterEditorController::loadFromFile(void)
         }
         
         QTextStream stream(&file);
-        _autopilot->readParametersFromStream(stream);
+        errors = _autopilot->readParametersFromStream(stream);
         file.close();
+        
+        if (!errors.isEmpty()) {
+            emit showErrorMessage(errors);
+        }
     }
 }
 

src/QmlControls/ParameterEditorController.h

@@ -54,6 +54,9 @@ public:
 	Q_INVOKABLE void setRCToParam(const QString& paramName);
 	
 	QList<QObject*> model(void);
+    
+signals:
+    void showErrorMessage(const QString& errorMsg);
 	
 private:
 	QStringList			_componentIds;