src/Configuration.h

/*
 *  LDForge: LDraw parts authoring CAD
 *  Copyright (C) 2013, 2014 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/>.
 */

#pragma once
#include <QString>
#include <QVariant>
#include <QKeySequence>
#include "Macros.h"
#include "Types.h"

class QSettings;

#define MAX_INI_LINE 512
#define MAX_CONFIG 512

#define cfg(T, NAME, DEFAULT) \
	Config::T##Type NAME; \
	T##Config config_##NAME (&NAME, #NAME, DEFAULT);

#define extern_cfg(T, NAME) extern Config::T##Type NAME;

// =========================================================
class Config
{
	PROPERTY (private, QString, name, setName, STOCK_WRITE)

	public:
		enum Type
		{
			EIntType,
			EStringType,
			EFloatType,
			EBoolType,
			EKeySequenceType,
			EListType,
			EVertexType,
		};

		using IntType			= int;
		using StringType		= QString;
		using FloatType			= float;
		using BoolType			= bool;
		using KeySequenceType	= QKeySequence;
		using ListType			= QList<QVariant>;
		using VertexType		= Vertex;

		Config (QString name);

		virtual QVariant	getDefaultAsVariant() const = 0;
		virtual Type		getType() const = 0;
		virtual bool		isDefault() const = 0;
		virtual void		loadFromVariant (const QVariant& val) = 0;
		virtual void		resetValue() = 0;
		virtual QVariant	toVariant() const = 0;

		// ------------------------------------------
		static bool load();
		static bool save();
		static void reset();
		static QString dirpath();
		static QString filepath (QString file);

	protected:
		static void addToArray (Config* ptr);
};

// =============================================================================
#define IMPLEMENT_CONFIG(NAME)													\
public:																			\
	using ValueType = Config::NAME##Type;										\
																				\
	NAME##Config (ValueType* valueptr, QString name, ValueType def) :			\
		Config (name),															\
		m_valueptr (valueptr),													\
		m_default (def)															\
	{																			\
		Config::addToArray (this);												\
		*m_valueptr = def;														\
	}																			\
																				\
	inline ValueType getValue() const											\
	{																			\
		return *m_valueptr;														\
	}																			\
																				\
	inline void setValue (ValueType val)										\
	{																			\
		*m_valueptr = val;														\
	}																			\
																				\
	virtual Config::Type getType() const										\
	{																			\
		return Config::E##NAME##Type;											\
	}																			\
																				\
	virtual void resetValue()													\
	{																			\
		*m_valueptr = m_default;												\
	}																			\
																				\
	virtual const ValueType& getDefault() const									\
	{																			\
		return m_default;														\
	}																			\
																				\
	virtual bool isDefault() const												\
	{																			\
		return *m_valueptr == m_default;										\
	}																			\
																				\
	virtual void loadFromVariant (const QVariant& val)							\
	{																			\
		*m_valueptr = val.value<ValueType>();									\
	}																			\
																				\
	virtual QVariant toVariant() const											\
	{																			\
		return QVariant::fromValue<ValueType> (*m_valueptr);					\
	}																			\
																				\
	virtual QVariant getDefaultAsVariant() const								\
	{																			\
		return QVariant::fromValue<ValueType> (m_default);						\
	}																			\
																				\
	static NAME##Config* getByName (QString name);								\
																				\
private:																		\
	ValueType*	m_valueptr;														\
	ValueType	m_default;

// =============================================================================
//
class IntConfig : public Config
{
	IMPLEMENT_CONFIG (Int)
};

// =============================================================================
//
class StringConfig : public Config
{
	IMPLEMENT_CONFIG (String)
};

// =============================================================================
//
class FloatConfig : public Config
{
	IMPLEMENT_CONFIG (Float)
};

// =============================================================================
//
class BoolConfig : public Config
{
	IMPLEMENT_CONFIG (Bool)
};

// =============================================================================
//
class KeySequenceConfig : public Config
{
	IMPLEMENT_CONFIG (KeySequence)
};

// =============================================================================
//
class ListConfig : public Config
{
	IMPLEMENT_CONFIG (List)
};

// =============================================================================
//
class VertexConfig : public Config
{
	IMPLEMENT_CONFIG (Vertex)
};