#ifndef ATTRIBUTE_H

#define ATTRIBUTE_H

#include <QStringList>

#include <QVariant>

#include "xmlobj.h"

class AttributeTable;

class AttributeDef;

enum AttributeType {

	Undefined,	//!< Undefined type

	StringList, //!< List of strings, one can be attribute value

	FreeString,	//!< Any string can be attribute value, not unique

	UniqueString//!< UniqueString, e.g. for IDs

};

/*! \brief A key and a value 

    The data itself is stored in Attribute Definitions (AttributeDef). A list of these tables

	AttributeTable is maintained for every MapEditor.

*/

class Attribute:public XMLObj {

public:

	Attribute();

	void setKey (const QString &k, const AttributeType &t);

	QString getKey ();

	void setValue (const QString &v);

	QVariant getValue ();

	void setType (const AttributeType &t);

	AttributeType getType ();

	QString getTypeString ();

	void setTable (AttributeTable *at);

	AttributeTable* getTable();

	QString getDataXML();

protected:

	AttributeTable *table;

	AttributeDef *definition;

	QString freeString;		//!< String value for type FreeString

};

/*! \brief 

	Attribute definition, defines possible values and type of attribute.

*/

class AttributeDef {

public:

	AttributeDef();

	~AttributeDef();

	void setType (const AttributeType &t);

	AttributeType getType();

	QString getTypeString ();

	void setKey (const QString &k);

	QString getKey ();

	void setValue (const QString &v);

	void setValue (const QVariant &v);

	QVariant getValue ();

private:

	QString key;

	AttributeType type;

	QVariant value;				//!< value (except FreeString, FreeInt ...

};

/*! \brief A table containing a list of keys and each of these keys has

   a list of default values. The keys and the values for each key are

   unique.

*/

class AttributeTable:public XMLObj{

public:

	AttributeTable();

	~AttributeTable();

	void clear();

	AttributeDef* addKey (const QString &k, const AttributeType &t);	//!< Adds a key to the table

	void removeKey (const QString &k);	//!< Removes key and its default values

	AttributeDef* getDef(const QString &k);	//!< Get defintion of attribute

	int countKeys();					//!< Return number of keys

	QStringList getKeys ();

	QString getDataXML();

protected:

	QList <AttributeDef*> attdefs;

};

#endif