diff -r 5f4395ec5db0 -r 04e140bdeb0b src/config.cc
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/config.cc	Fri Dec 13 20:01:49 2013 +0200
@@ -0,0 +1,140 @@
+/*
+ *  LDForge: LDraw parts authoring CAD
+ *  Copyright (C) 2013 Santeri Piippo
+ *
+ *  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 3 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, see <http://www.gnu.org/licenses/>.
+ *  =====================================================================
+ *
+ *  config.cpp: Configuration management. I don't like how unsafe QSettings
+ *  is so this implements a type-safer and identifer-safer wrapping system of
+ *  configuration variables. QSettings is used underlyingly, this is a matter
+ *  of interface.
+ */
+
+#include <errno.h>
+#include <QDir>
+#include <QTextStream>
+#include <QSettings>
+#include "main.h"
+#include "config.h"
+#include "misc.h"
+#include "gui.h"
+#include "document.h"
+
+#ifdef _WIN32
+# define EXTENSION ".ini"
+#else
+# define EXTENSION ".cfg"
+#endif // _WIN32
+
+Config* g_configPointers[MAX_CONFIG];
+static int g_cfgPointerCursor = 0;
+
+// =============================================================================
+// Get the QSettings object. A portable build refers to a file in the current
+// directory, a non-portable build to ~/.config/LDForge or to registry.
+// -----------------------------------------------------------------------------
+static QSettings* getSettingsObject()
+{
+#ifdef PORTABLE
+	return new QSettings (str (APPNAME).toLower() + EXTENSION, QSettings::IniFormat);
+#else
+	return new QSettings;
+#endif // PORTABLE
+}
+
+Config::Config (const char* name, const char* defstring) :
+	name (name), m_defstring (defstring) {}
+
+// =============================================================================
+// Load the configuration from file
+// -----------------------------------------------------------------------------
+bool Config::load()
+{	QSettings* settings = getSettingsObject();
+	log ("config::load: Loading configuration file from %1\n", settings->fileName());
+
+	for (Config* cfg : g_configPointers)
+	{	if (!cfg)
+			break;
+
+		QVariant val = settings->value (cfg->name, cfg->defaultVariant());
+		cfg->loadFromVariant (val);
+	}
+
+	settings->deleteLater();
+	return true;
+}
+
+// =============================================================================
+// Save the configuration to disk
+// -----------------------------------------------------------------------------
+bool Config::save()
+{	QSettings* settings = getSettingsObject();
+	log ("Saving configuration to %1...\n", settings->fileName());
+
+	for (Config* cfg : g_configPointers)
+	{	if (!cfg)
+			break;
+
+		if (cfg->isDefault())
+			continue;
+
+		settings->setValue (cfg->name, cfg->toVariant());
+	}
+
+	settings->sync();
+	settings->deleteLater();
+	return true;
+}
+
+// =============================================================================
+// Reset configuration defaults.
+// -----------------------------------------------------------------------------
+void Config::reset()
+{	for (Config * cfg : g_configPointers)
+	{	if (!cfg)
+			break;
+
+		cfg->resetValue();
+	}
+}
+
+// =============================================================================
+// Where is the configuration file located at? Note that the Windows build uses
+// the registry so only use this with PORTABLE code.
+// -----------------------------------------------------------------------------
+str Config::filepath (str file)
+{	return Config::dirpath() + DIRSLASH + file;
+}
+
+// =============================================================================
+// Directory of the configuration file. PORTABLE code here as well.
+// -----------------------------------------------------------------------------
+str Config::dirpath()
+{	QSettings* cfg = getSettingsObject();
+	return dirname (cfg->fileName());
+}
+
+// =============================================================================
+// We cannot just add config objects to a list or vector because that would rely
+// on the vector's c-tor being called before the configs' c-tors. With global
+// variables we cannot assume that!! Therefore we need to use a C-style array here.
+// -----------------------------------------------------------------------------
+void Config::addToArray (Config* ptr)
+{	if (g_cfgPointerCursor == 0)
+		memset (g_configPointers, 0, sizeof g_configPointers);
+
+	assert (g_cfgPointerCursor < MAX_CONFIG);
+	g_configPointers[g_cfgPointerCursor++] = ptr;
+}