#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