File indexing completed on 2024-12-08 06:40:58

 /*
     This file is part of the KDE project
     SPDX-FileCopyrightText: 2007, 2009 Rafael Fernández López <ereslibre@kde.org>
 
     SPDX-License-Identifier: LGPL-2.0-or-later
 */
 
 #ifndef KCATEGORYDRAWER_H
 #define KCATEGORYDRAWER_H
 
 #include <kitemviews_export.h>
 
 #include <QMouseEvent>
 #include <QObject>
 #include <memory>
 
 class KCategoryDrawerPrivate;
 
 class QPainter;
 class QModelIndex;
 class QStyleOption;
 
 class KCategorizedView;
 
 /**
  * @class KCategoryDrawer kcategorydrawer.h KCategoryDrawer
  *
  * The category drawing is performed by this class. It also gives information about the category
  * height and margins.
  *
  */
 class KITEMVIEWS_EXPORT KCategoryDrawer : public QObject
 {
     Q_OBJECT
     friend class KCategorizedView;
 
 public:
     /*
      * Construct a category drawer for a given view
      *
      * @since 5.0
      */
     KCategoryDrawer(KCategorizedView *view);
     ~KCategoryDrawer() override;
 
     /**
      * @return The view this category drawer is associated with.
      */
     KCategorizedView *view() const;
 
     /**
      * This method purpose is to draw a category represented by the given
      * @param index with the given @param sortRole sorting role
      *
      * @note This method will be called one time per category, always with the
      *       first element in that category
      */
     virtual void drawCategory(const QModelIndex &index, int sortRole, const QStyleOption &option, QPainter *painter) const;
 
     /**
      * @return The category height for the category represented by index @p index with
      *         style options @p option.
      */
     virtual int categoryHeight(const QModelIndex &index, const QStyleOption &option) const;
 
     /**
      * @note 0 by default
      *
      * @since 4.4
      */
     virtual int leftMargin() const;
 
     /**
      * @note 0 by default
      *
      * @since 4.4
      */
     virtual int rightMargin() const;
 
 Q_SIGNALS:
     /**
      * This signal becomes emitted when collapse or expand has been clicked.
      */
     void collapseOrExpandClicked(const QModelIndex &index);
 
     /**
      * Emit this signal on your subclass implementation to notify that something happened. Usually
      * this will be triggered when you have received an event, and its position matched some "hot spot".
      *
      * You give this action the integer you want, and having connected this signal to your code,
      * the connected slot can perform the needed changes (view, model, selection model, delegate...)
      */
     void actionRequested(int action, const QModelIndex &index);
 
 protected:
     /**
      * Method called when the mouse button has been pressed.
      *
      * @param index The representative index of the block of items.
      * @param blockRect The rect occupied by the block of items.
      * @param event The mouse event.
      *
      * @warning You explicitly have to determine whether the event has been accepted or not. You
      *          have to call event->accept() or event->ignore() at all possible case branches in
      *          your code.
      */
     virtual void mouseButtonPressed(const QModelIndex &index, const QRect &blockRect, QMouseEvent *event);
 
     /**
      * Method called when the mouse button has been released.
      *
      * @param index The representative index of the block of items.
      * @param blockRect The rect occupied by the block of items.
      * @param event The mouse event.
      *
      * @warning You explicitly have to determine whether the event has been accepted or not. You
      *          have to call event->accept() or event->ignore() at all possible case branches in
      *          your code.
      */
     virtual void mouseButtonReleased(const QModelIndex &index, const QRect &blockRect, QMouseEvent *event);
 
     /**
      * Method called when the mouse has been moved.
      *
      * @param index The representative index of the block of items.
      * @param blockRect The rect occupied by the block of items.
      * @param event The mouse event.
      */
     virtual void mouseMoved(const QModelIndex &index, const QRect &blockRect, QMouseEvent *event);
 
     /**
      * Method called when the mouse button has been double clicked.
      *
      * @param index The representative index of the block of items.
      * @param blockRect The rect occupied by the block of items.
      * @param event The mouse event.
      *
      * @warning You explicitly have to determine whether the event has been accepted or not. You
      *          have to call event->accept() or event->ignore() at all possible case branches in
      *          your code.
      */
     virtual void mouseButtonDoubleClicked(const QModelIndex &index, const QRect &blockRect, QMouseEvent *event);
 
     /**
      * Method called when the mouse button has left this block.
      *
      * @param index The representative index of the block of items.
      * @param blockRect The rect occupied by the block of items.
      */
     virtual void mouseLeft(const QModelIndex &index, const QRect &blockRect);
 
 private:
     std::unique_ptr<KCategoryDrawerPrivate> const d;
 };
 
 #endif // KCATEGORYDRAWER_H