Add new SettingsFact

Supports connecting a Fact to a QSettings value

src/FactSystem/Fact.h

@@ -136,7 +136,7 @@ signals:
     /// This signal is meant for use by Fact container implementations.
     void _containerRawValueChanged(const QVariant& value);
     
-private:
+protected:
     QString _variantToString(const QVariant& variant) const;
 
     QString                     _name;

src/FactSystem/SettingsFact.cc

@@ -0,0 +1,73 @@
+/*=====================================================================
+ 
+ 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 "SettingsFact.h"
+
+#include <QSettings>
+
+SettingsFact::SettingsFact(QObject* parent)
+    : Fact(parent)
+{    
+
+}
+
+SettingsFact::SettingsFact(QString settingGroup, QString settingName, FactMetaData::ValueType_t type, const QVariant& defaultValue, QObject* parent)
+    : Fact(0, settingName, type, parent)
+    , _settingGroup(settingGroup)
+{
+    QSettings settings;
+
+    if (!_settingGroup.isEmpty()) {
+        settings.beginGroup(_settingGroup);
+    }
+
+    _rawValue = settings.value(_name, defaultValue);
+
+    connect(this, &Fact::valueChanged, this, &SettingsFact::_valueChanged);
+}
+
+SettingsFact::SettingsFact(const SettingsFact& other, QObject* parent)
+    : Fact(other, parent)
+{
+    *this = other;
+}
+
+const SettingsFact& SettingsFact::operator=(const SettingsFact& other)
+{
+    Fact::operator=(other);
+    
+    _settingGroup = other._settingGroup;
+
+    return *this;
+}
+
+void SettingsFact::_valueChanged(QVariant value)
+{
+    QSettings settings;
+
+    if (!_settingGroup.isEmpty()) {
+        settings.beginGroup(_settingGroup);
+    }
+
+    settings.setValue(_name, value);
+}

src/FactSystem/SettingsFact.h

@@ -0,0 +1,51 @@
+/*=====================================================================
+ 
+ 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
+///     @author Don Gagne <don@thegagnes.com>
+
+#ifndef SettingsFact_H
+#define SettingsFact_H
+
+#include "Fact.h"
+
+/// @brief A SettingsFact is Fact which holds a QSettings value.
+class SettingsFact : public Fact
+{
+    Q_OBJECT
+    
+public:
+    SettingsFact(QObject* parent = NULL);
+    SettingsFact(QString settingGroup, QString settingName, FactMetaData::ValueType_t type, const QVariant& defaultValue, QObject* parent = NULL);
+    SettingsFact(const SettingsFact& other, QObject* parent = NULL);
+
+    const SettingsFact& operator=(const SettingsFact& other);
+
+private slots:
+    void _valueChanged(QVariant value);
+
+private:
+    QString _settingGroup;
+};
+
+#endif