File indexing completed on 2024-05-12 04:20:39

 /*
  * SPDX-FileCopyrightText: 2001-2015 Klaralvdalens Datakonsult AB. All rights reserved.
  *
  * This file is part of the KGantt library.
  *
  * SPDX-License-Identifier: GPL-2.0-or-later
  */
 
 #ifndef KGANTTCONSTRAINTMODEL_H
 #define KGANTTCONSTRAINTMODEL_H
 
 #include <QModelIndex>
 #include <QDebug>
 
 #include "kganttglobal.h"
 #include "kganttconstraint.h"
 
 namespace KGantt {
 
 
     /*!\class KGantt::ConstraintModel
      *\ingroup KGantt
      * The ConstraintModel keeps track of the
      * interdependencies between gantt items in
      * a View.
      *
      */
     class KGANTT_EXPORT ConstraintModel : public QObject {
         Q_OBJECT
         KGANTT_DECLARE_PRIVATE_DERIVED_PARENT( ConstraintModel, QObject* )
      public:
 
 
         /*! Constructor. Creates an empty ConstraintModel with parent \a parent
          */
         explicit ConstraintModel( QObject* parent = nullptr );
 
 
         /*! Destroys this ConstraintModel */
         ~ConstraintModel() override;
 
         /*! Adds the constraint \a c to this ConstraintModel
          *  If the Constraint \a c is already in this ConstraintModel,
          *  nothing happens.
          *
          * Subclassing ConstraintModel and overriding addConstraint() and removeConstraint() can provide
          * re-entrancy issues in the ConstraintModel<->ConstraintProxy interaction. Therefore it is recommended
          * to better subclass GraphicsView and override addConstraint() there.
          */
         virtual void addConstraint( const Constraint& c );
 
         /*! Removes the Constraint \a c from this
          * ConstraintModel. If \a c was found and removed,
          * the signal constraintRemoved(const Constraint&) is emitted.
          *
          * \returns If \a c was found and removed, it returns true,
          * otherwise it returns false.
          */
         virtual bool removeConstraint( const Constraint& c );
 
         /*! Removes all Constraints from this model
          * The signal constraintRemoved(const Constraint&) is emitted
          * for every Constraint that is removed.
          */
         void clear();
 
         /*! Not used */
         void cleanup();
 
         /*! \returns A list of all Constraints in this
          * ConstraintModel.
          */
         QList<Constraint> constraints() const;
 
         /*! Returns true if a Constraint with start \a s and end \a e
          * exists, otherwise false.
          */
         bool hasConstraint( const Constraint& c ) const;
         inline bool hasConstraint( const QModelIndex& s,
                                    const QModelIndex& e ) const;
 
 
         /*! \returns A list of all Constraints in this ConstraintModel
          * that have an endpoint at \a idx.
          */
         QList<Constraint> constraintsForIndex( const QModelIndex& ) const;
 
     Q_SIGNALS:
         void constraintAdded(const KGantt::Constraint&);
         void constraintRemoved(const KGantt::Constraint&);
 
     private:
         Private* _d;
     };
 
     inline const ConstraintModel::Private* ConstraintModel::d_func() const { return _d; }
     inline ConstraintModel::Private* ConstraintModel::d_func() { return _d; }
     inline bool ConstraintModel::hasConstraint( const QModelIndex& s, const QModelIndex& e ) const {
         return hasConstraint( Constraint( s, e ) );
     }
 }
 
 #ifndef QT_NO_DEBUG_STREAM
 
 QDebug KGANTT_EXPORT operator<<( QDebug dbg, const KGantt::ConstraintModel& model );
 inline QDebug operator<<( QDebug dbg, KGantt::ConstraintModel* model )
 {
     return operator<<(dbg,*model);
 }
 
 #endif /* QT_NO_DEBUG_STREAM */
 
 #endif /* KGANTTCONSTRAINTMODEL_H */