-added new Preferences Dialog for Appearance

-moved some Settings from General to Appearance ( Language, Style, stylesheet
-added checkbox for Start RetroShare with System start in GeneralDialog
-moved Rsharesettings to Preferences folder to find bether 
-added new RSettings source 
-clean uped some old code stuff in MainWindow which is not more needed
-replaced in MainWindow PreferencesWindows open function with new one.

git-svn-id: http://svn.code.sf.net/p/retroshare/code/trunk@684 b45a01b8-16f6-495d-af2f-9b41ad6348cc

retroshare-gui/src/gui/Preferences/rsettings.cpp

@@ -0,0 +1,95 @@
+/****************************************************************
+ * This file is distributed under the following license:
+ *
+ * Copyright (c) 2008, crypton
+ * Copyright (c) 2008, Matt Edman, Justin Hipple
+ *
+ *  This program 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 2
+ *  of the License, or (at your option) any later version.
+ *
+ *  This program 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 this program; if not, write to the Free Software
+ *  Foundation, Inc., 51 Franklin Street, Fifth Floor, 
+ *  Boston, MA  02110-1301, USA.
+ ****************************************************************/
+
+#include <rshare.h>
+
+#include "rsettings.h"
+
+/** The file in which all settings will read and written. */
+#define SETTINGS_FILE   (Rshare::dataDirectory() + "/RetroShare.conf")
+
+/** Constructor */
+RSettings::RSettings(const QString settingsGroup)
+: QSettings(SETTINGS_FILE, QSettings::IniFormat)
+{
+  if (!settingsGroup.isEmpty())
+    beginGroup(settingsGroup);
+}
+
+/** Returns the saved value associated with <b>key</b>. If no value has been
+ * set, the default value is returned.
+ * \sa setDefault
+ */
+QVariant
+RSettings::value(const QString &key, const QVariant &defaultVal) const
+{
+  return QSettings::value(key, defaultVal.isNull() ? defaultValue(key)
+                                                   : defaultVal);
+}
+
+/** Sets the value associated with <b>key</b> to <b>val</b>. */
+void
+RSettings::setValue(const QString &key, const QVariant &val)
+{
+  if (val == defaultValue(key))
+    QSettings::remove(key);
+  else if (val != value(key))
+    QSettings::setValue(key, val);
+}
+
+/** Sets the default setting for <b>key</b> to <b>val</b>. */
+void
+RSettings::setDefault(const QString &key, const QVariant &val)
+{
+  _defaults.insert(key, val);
+}
+
+/** Returns the default setting value associated with <b>key</b>. If
+ * <b>key</b> has no default value, then an empty QVariant is returned. */
+QVariant
+RSettings::defaultValue(const QString &key) const
+{
+  if (_defaults.contains(key))
+    return _defaults.value(key);
+  return QVariant();
+}
+
+/** Resets all of Vidalia's settings. */
+void
+RSettings::reset()
+{
+  /* Static method, so we have to create a QSettings object. */
+  QSettings settings(SETTINGS_FILE, QSettings::IniFormat);
+  settings.clear();
+}
+
+/** Returns a map of all currently saved settings at the last appyl() point. */
+/*QMap<QString, QVariant>
+RSettings::allSettings() const
+{
+  QMap<QString, QVariant> settings;
+  foreach (QString key, allKeys()) {
+    settings.insert(key, value(key));
+  }
+  return settings;
+}*/
+