69 changes: 32 additions & 37 deletions src/core/raster/qgsrasterpipe.h
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Original file line number Diff line number Diff line change
Expand Up @@ -31,12 +31,10 @@
/** \ingroup core
* Base class for processing modules.
*/
class CORE_EXPORT QgsRasterPipe //: public QObject
class CORE_EXPORT QgsRasterPipe
{
//Q_OBJECT

public:
// Role of known filters
// Role of known interfaces
enum Role
{
UnknownRole = 0,
Expand All @@ -50,35 +48,38 @@ class CORE_EXPORT QgsRasterPipe //: public QObject

virtual ~QgsRasterPipe();

/** \brief Try to connect filters in pipe and to the provider at beginning.
/** \brief Try to connect interfaces in pipe and to the provider at beginning.
Returns true if connected or false if connection failed */
bool connectFilters( QVector<QgsRasterInterface*> theFilters );

bool connect( QVector<QgsRasterInterface*> theInterfaces );

/** Try to insert filter at specified index and connect
* if connection would fail, the filter is not inserted and false is returned */
bool insert( int idx, QgsRasterInterface* theFilter );
/** Try to insert interface at specified index and connect
* if connection would fail, the interface is not inserted and false is returned */
bool insert( int idx, QgsRasterInterface* theInterface );

/** Try to replace filter at specified index and connect
* if connection would fail, the filter is not inserted and false is returned */
bool replace( int idx, QgsRasterInterface* theFilter );
/** Try to replace interface at specified index and connect
* if connection would fail, the interface is not inserted and false is returned */
bool replace( int idx, QgsRasterInterface* theInterface );

/** Insert a new filter in prefered place or replace similar filter if it
* already exists */
bool setFilter( QgsRasterInterface * theFilter );
/** Insert a new known interface in default place or replace interface of the same
* role if it already exists. Known interfaces are: QgsRasterDataProvider,
* QgsRasterRenderer, QgsRasterResampleFilter, QgsRasterProjector and their
* subclasses. For unknown interfaces it mus be explicitly specified position
* where it should be inserted using insert() method.
*/
bool set( QgsRasterInterface * theInterface );

/** Get known filter by role */
QgsRasterInterface * filter( Role role ) const;
/** Get known interface by role */
QgsRasterInterface * interface( Role role ) const;

/** Remove and delete filter at given index if possible */
/** Remove and delete interface at given index if possible */
bool remove( int idx );

/** Remove and delete filter from pipe if possible */
bool remove( QgsRasterInterface * theFilter );
/** Remove and delete interface from pipe if possible */
bool remove( QgsRasterInterface * theInterface );

int size() { return mFilters.size(); }
QgsRasterInterface * at( int idx ) { return mFilters.at( idx ); }
QgsRasterInterface * last() { return mFilters.last(); }
int size() { return mInterfaces.size(); }
QgsRasterInterface * at( int idx ) { return mInterfaces.at( idx ); }
QgsRasterInterface * last() { return mInterfaces.last(); }

// Getters for special types of interfaces
QgsRasterDataProvider * provider() const;
Expand All @@ -88,24 +89,18 @@ class CORE_EXPORT QgsRasterPipe //: public QObject

private:
/** Get known parent type_info of interface parent */
Role filterRole( QgsRasterInterface * filter ) const;

// Filters in pipe, the first is always provider
QVector<QgsRasterInterface*> mFilters;
Role interfaceRole( QgsRasterInterface * interface ) const;

// Special types of interfaces
QgsRasterDataProvider * mProvider;
QgsRasterRenderer * mRenderer;
QgsRasterResampleFilter * mResampleFilter;
QgsRasterProjector * mProjector;
// Interfaces in pipe, the first is always provider
QVector<QgsRasterInterface*> mInterfaces;

QMap<Role, int> mRoleMap;

// Set role in mFiltersMap
void setRole( QgsRasterInterface * theFilter, int idx );
// Set role in mRoleMap
void setRole( QgsRasterInterface * theInterface, int idx );

// Unset role in mFiltersMap
void unsetRole( QgsRasterInterface * theFilter );
// Unset role in mRoleMap
void unsetRole( QgsRasterInterface * theInterface );
};

#endif
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