File indexing completed on 2024-05-12 04:43:05

 /***************************************************************************
  *   Copyright (C) 2018 by Emmanuel Lepage Vallee                          *
  *   Author : Emmanuel Lepage Vallee <emmanuel.lepage@kde.org>             *
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 3 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  *   This program is distributed in the hope that it will be useful,       *
  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  *   GNU General Public License for more details.                          *
  *                                                                         *
  *   You should have received a copy of the GNU General Public License     *
  *   along with this program.  If not, see <http://www.gnu.org/licenses/>. *
  **************************************************************************/
 #ifndef KQUICKITEMVIEWS_PROXIMITY_P_H
 #define KQUICKITEMVIEWS_PROXIMITY_P_H
 
 #include <QtCore/QRectF>
 #include <QtCore/QModelIndexList>
 
 #include <private/indexmetadata_p.h>
 
 class ProximityPrivate;
 
 namespace StateTracker {
 
 class Index;
 
 /**
  * Track if the elements next to this one are loaded.
  *
  * This tries to prevent accidental "holes" with unloaded elements between
  * two visible ones.
  *
  * This state tracker doesn't know about what's loaded and what's not. To
  * make it work, it is important to send all relevent events otherwise it will
  * go out of sync and start doing useless model queries (but hopefully nothing
  * worst).
  */
 class Proximity
 {
 public:
     explicit Proximity(IndexMetadata *q, StateTracker::Index *self);
 
     enum class State {
         UNKNOWN , /*!< The information is not availablr           */
         LOADED  , /*!< The edges are valid                        */
         MOVED   , /*!< It was valid, but some elements moved      */
         UNLOADED, /*!< It is known that some edges are not loaded */
     };
 
     void performAction(IndexMetadata::ProximityAction a, Qt::Edge e);
 
     bool canLoadMore(Qt::Edge e);
 
     QModelIndexList getNext(Qt::Edge e);
 
 private:
     ProximityPrivate *d_ptr;
 };
 
 }
 
 #endif