File indexing completed on 2024-04-28 04:41:50

 /***************************************************************************
  *   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/>. *
  **************************************************************************/
 
 #include <adapters/geometryadapter.h>
 
 //Qt
 class QAbstractItemModel;
 
 class GeoStrategySelectorPrivate;
 
 /**
  * The "real" strategy adapter.
  *
  * It acts as a proxy with a built-in chain of responsibilities to select the
  * best geometry hints strategy automatically.
  *
  * For this, it uses runtime data introspection to auto-detect features that
  * allows to make a better strategy choice.
  */
 class GeoStrategySelector final : public GeometryAdapter
 {
     Q_OBJECT
 public:
 
     /**
      * Auto detected and provided features.
      */
     enum Features {
         NONE               = 0x0 << 0 , /*!< No features to make en enlighten choice */
         HAS_MODEL          = 0x1 << 0 , /*!< Has a model                             */
         HAS_SHP_MODEL      = 0x1 << 1 , /*!< Has a QSizeHintProxyModel               */
         HAS_MODEL_CONTENT  = 0x1 << 2 , /*!< Has a model with content to introspect  */
         HAS_SIZE_ROLE      = 0x1 << 3 , /*!< Has a model with valid size hints       */
         HAS_DELEGATE       = 0x1 << 4 , /*!< Has a delegate instance                 */
         HAS_OVERRIDE       = 0x1 << 5 , /*!< A GeometryAdapter was manually set      */
         HAS_SCROLLBAR      = 0x1 << 6 , /*!< The view need the full geometry         */
         HAS_CHILDREN       = 0x1 << 7 , /*!< The model only has top level            */
         HAS_COLUMNS        = 0x1 << 8 , /*!< The model has more than 1 column        */
         HAS_MAX_DEPTH      = 0x1 << 9 , /*!< There is a known maximum recursion      */
         IS_FULLY_COLLAPSED = 0x1 << 10, /*!< It is a tree, but nothing is expanded   */
     };
     Q_FLAGS(Features)
 
     explicit GeoStrategySelector(Viewport *parent = nullptr);
     virtual ~GeoStrategySelector();
 
     virtual QSizeF sizeHint(const QModelIndex& index, AbstractItemAdapter *adapter) const override;
     virtual QPointF positionHint(const QModelIndex& index, AbstractItemAdapter *adapter) const override;
 
     virtual int capabilities() const override;
 
     virtual bool isSizeForced() const override;
     virtual void setSizeForced(bool f) override;
 
     void setModel(QAbstractItemModel *m);
 
     void setHasScrollbar(bool v);
 
     /// Return true when the currentAdapter is selected using the capabilities.
     bool isAutomatic() const;
 
     GeometryAdapter *currentAdapter() const;
     void setCurrentAdapter(GeometryAdapter *a);
 
 private:
     GeoStrategySelectorPrivate *d_ptr;
     Q_DECLARE_PRIVATE(GeoStrategySelector)
 };