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/*===========================================================================*\
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*                                                                            *
*                              OpenFlipper                                   *
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 *           Copyright (c) 2001-2015, RWTH-Aachen University                 *
 *           Department of Computer Graphics and Multimedia                  *
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 *                            www.openflipper.org                            *
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 * This file is part of OpenFlipper.                                         *
 *---------------------------------------------------------------------------*
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 * modification, are permitted provided that the following conditions        *
 * are met:                                                                  *
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 * 1. Redistributions of source code must retain the above copyright notice, *
 *    this list of conditions and the following disclaimer.                  *
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*                                                                            *
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\*===========================================================================*/

//=============================================================================
//
//  Types
//
//=============================================================================

/**
 * \file DataTypes.hh
 * This File contains the basic type informations
 */

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#pragma once
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//== includes =================================================================


#include <OpenFlipper/common/GlobalDefines.hh>
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#include <OpenFlipper/common/UpdateType.hh>
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#include <ACG/Math/Matrix4x4T.hh>
#include <ACG/Math/VectorT.hh>
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#include <climits>
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#include <QIcon>
#include <QMetaType>

//== Global Typedefs  =================================================================

/** \brief Predefined datatypes
*
* Here are several datatypes which have predefined ids. This might be changed to runtime added
* datatypes in the future.
*/

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/** \brief the internal DataType class
*
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* Normally we could use an unsigned int here. But QT can't register an
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* typedef unsigned int DataType as DataType and will recognize it as unsigned int and
* therefore DataType will still be unknown to QtScript.
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* To overcome this Problem, we reimplement a wrapper around the int and provide additional
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* functionality such as returning the name of the type directly
*/ 
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class DLLEXPORT DataType  {
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  public:
    DataType();
    DataType(const unsigned int& _i);
    
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    bool operator!=( const unsigned int& _i ) const;
    bool operator!=( const DataType& _i ) const;
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    bool operator==( const unsigned int& _i ) const;
    bool operator==(  const DataType& _i ) const;
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    DataType& operator=( const unsigned int& _i );
    DataType& operator=( const DataType& _i );
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    bool operator<( const unsigned int& _i ) const;
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    bool operator<( const DataType& _i ) const;
    
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    DataType& operator|=( const unsigned int& _i );
    DataType& operator|=( const DataType& _i );    
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    bool operator&( const unsigned int& _i ) const;
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    bool operator&( const DataType& _i ) const;
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    DataType operator!();
    
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    bool contains( const DataType& _i ) const;
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    DataType operator|( const DataType& _i ) const;

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    DataType operator++(int _unused);

    DataType& operator++();

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    /** return the internal representation of the type which is an unsigned int at the moment.
    *
    * You should avoid using this directly as the internal representation might change in the future
    */
    unsigned int value() const;
      
    /// Return the name of this type as text
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    QString name() const;
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  private:
    unsigned int field;
};

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class TypeInfo {

  public:

  TypeInfo(DataType _type, QString _name, QString _iconName, QString _readableName ) :
    type(_type),
    name(_name),
    iconName(_iconName),
    readableName(_readableName)
  {
    // Use internal name if no external name is given
    if ( _readableName == "" )
      readableName = _name;
  }

  /// The id of the datatype
  DataType type;

  /// The name of the datatype
  QString  name;

  /// The icon of the datatype
  QString  iconName;

  QIcon    icon;

  /// Human readable name
  QString readableName;
};

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/// Identifier for all available objects
const DataType DATA_ALL(UINT_MAX);

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/// None of the other Objects
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const DataType DATA_UNKNOWN(0);
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/// Items used for Grouping
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const DataType DATA_GROUP(1);
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std::ostream &operator<<(std::ostream &stream, DataType type);
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//== TYPEDEFS =================================================================

/// Standard Type for 3d Vector used for scripting
typedef ACG::Vec3d Vector;
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/// Standard Type for 4d Vector used for scripting
typedef ACG::Vec4d Vector4;
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/// Standard Type for id Lists used for scripting
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typedef std::vector< int > IdList;
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/// Standard Type for a 4x4 Matrix used for scripting
typedef ACG::Matrix4x4d Matrix4x4;

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Q_DECLARE_METATYPE(IdList)
Q_DECLARE_METATYPE(DataType)
Q_DECLARE_METATYPE(QVector< int >)
Q_DECLARE_METATYPE(Vector)
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Q_DECLARE_METATYPE(Vector4)
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Q_DECLARE_METATYPE(Matrix4x4)
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Q_DECLARE_METATYPE(UpdateType)

/** Registers datatypes on runtime for signal/slots
 *
 */
DLLEXPORT
void registerTypes();
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//================================================================================================
/** @name Functions for adding dataTypes
* @{ */
//================================================================================================

/** Adds a datatype and returns the id for the new type
*
* @param _name Internal name for the new DataType
* @param _readableName Human readable Name for this type ( Use tr to make it translatable )
*/
DLLEXPORT
DataType addDataType(QString _name, QString _readableName);

/// Given a dataType Identifier string this function will return the id of the datatype
DLLEXPORT
DataType typeId(QString _name);

/** \brief Get the name of a type with given id
*
* The ids are organized in a bitfield. So use either the macro for getting the type id or
* use the id directly (they have to be power of 2! ... Bitfield)
*/
DLLEXPORT
QString typeName(DataType _id);

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/** \brief Check if a type with the given name exists
*
*/
DLLEXPORT
bool typeExists( QString _name );

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/** \brief Get the number of registered types
*
* This function will return the number of types registered to the core. You can use it to
* iterate over all types. 
*
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* \note Remember that the types are organized in a bitfield!
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*/
DLLEXPORT 
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size_t typeCount();
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/** @} */

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//================================================================================================
/** @name Type iterators
* @{ */
//================================================================================================

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/// Get iterator pointing to the first element in the types list
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DLLEXPORT
std::vector< TypeInfo >::const_iterator typesBegin();

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/// Get iterator pointing to the last element in the types list
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DLLEXPORT
std::vector< TypeInfo >::const_iterator typesEnd();

/** @} */

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//================================================================================================
/** @name Datatype Name handling
* @{ */
//================================================================================================

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/// Get DataType Human readable name ( this name might change. Use the typeName instead! )
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DLLEXPORT
QString dataTypeName( DataType _id );

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/// Get DataType Human readable name ( this name might change. Use the typeName instead! )
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DLLEXPORT
QString dataTypeName( QString _typeName);

/// Set DataType Human readable name
DLLEXPORT
void setDataTypeName( DataType _id, QString _name );

/// Set DataType Human readable name
DLLEXPORT
void setDataTypeName( QString _typeName, QString _name );


/** @} */

//================================================================================================
/** @name Datatype Icons
* @{ */
//================================================================================================

/// Get a string with the filename of the icon for the DataType name
DLLEXPORT
QString typeIconName(QString  _name);

/// Get a string with the filename of the icon for the DataType
DLLEXPORT
QString typeIconName(DataType _id);

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/** \brief Get an QIcon associated with the given DataType
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* 
* The icons are loaded once when set and then the reference is returned here.
* This reduces the time when frequently requesting the icons (e.g. DataControl)
*/
DLLEXPORT
QIcon& typeIcon(DataType _id);

/// Set an Icon for a given DataType
DLLEXPORT
void setTypeIcon( DataType _id   , QString _icon);

/// Set an Icon for a given DataType
DLLEXPORT
void setTypeIcon( QString  _name , QString _icon );

/** @} */