src/views/selectionmanager.h

   1 /***************************************************************************
   2  *   Copyright (C) 2008 by Peter Penz <peter.penz@gmx.at>                  *
   3  *                                                                         *
   4  *   This program is free software; you can redistribute it and/or modify  *
   5  *   it under the terms of the GNU General Public License as published by  *
   6  *   the Free Software Foundation; either version 2 of the License, or     *
   7  *   (at your option) any later version.                                   *
   8  *                                                                         *
   9  *   This program is distributed in the hope that it will be useful,       *
  10  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  11  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  12  *   GNU General Public License for more details.                          *
  13  *                                                                         *
  14  *   You should have received a copy of the GNU General Public License     *
  15  *   along with this program; if not, write to the                         *
  16  *   Free Software Foundation, Inc.,                                       *
  17  *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA            *
  18  ***************************************************************************/
  19
  20 #ifndef SELECTIONMANAGER_H
  21 #define SELECTIONMANAGER_H
  22
  23 #include <KFileItem>
  24
  25 #include <QObject>
  26
  27 class QAbstractItemView;
  28 class QModelIndex;
  29 class QItemSelection;
  30 class SelectionToggle;
  31
  32 /**
  33  * @brief Allows to select and deselect items for item views.
  34  *
  35  * Whenever an item is hovered by the mouse, a toggle button is shown
  36  * which allows to select/deselect the current item.
  37  */
  38 class SelectionManager : public QObject
  39 {
  40     Q_OBJECT
  41
  42 public:
  43     SelectionManager(QAbstractItemView* parent);
  44     virtual ~SelectionManager();
  45     virtual bool eventFilter(QObject* watched, QEvent* event);
  46
  47 public slots:
  48     /**
  49      * Resets the selection manager so that the toggle button gets
  50      * invisible.
  51      */
  52     void reset();
  53
  54 signals:
  55     /** Is emitted if the selection has been changed by the toggle button. */
  56     void selectionChanged();
  57
  58 private slots:
  59     void slotEntered(const QModelIndex& index);
  60     void slotViewportEntered();
  61     void setItemSelected(bool selected);
  62     void slotRowsRemoved(const QModelIndex& parent, int start, int end);
  63     void slotSelectionChanged(const QItemSelection& selected, const QItemSelection& deselected);
  64
  65 private:
  66     KUrl urlForIndex(const QModelIndex& index) const;
  67     const QModelIndex indexForUrl(const KUrl& url) const;
  68     void applyPointingHandCursor();
  69     void restoreCursor();
  70
  71 private:
  72     QAbstractItemView* m_view;
  73     SelectionToggle* m_toggle;
  74     bool m_connected;
  75     bool m_appliedPointingHandCursor;
  76 };
  77
  78 #endif