apps/dolphin/src/dolphiniconsview.h

   1 /***************************************************************************
   2  *   Copyright (C) 2006 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 DOLPHINICONSVIEW_H
  21 #define DOLPHINICONSVIEW_H
  22
  23 #include <kcategorizedview.h>
  24
  25 #include <kfileitem.h>
  26 #include <kfileitemdelegate.h>
  27
  28 #include <QFont>
  29 #include <QSize>
  30 #include <QStyleOption>
  31
  32 #include <libdolphin_export.h>
  33
  34 class DolphinController;
  35 class DolphinCategoryDrawer;
  36
  37 /**
  38  * @brief Represents the view, where each item is shown as an icon.
  39  *
  40  * It is also possible that instead of the icon a preview of the item
  41  * content is shown.
  42  */
  43 class LIBDOLPHINPRIVATE_EXPORT DolphinIconsView : public KCategorizedView
  44 {
  45     Q_OBJECT
  46
  47 public:
  48     explicit DolphinIconsView(QWidget* parent, DolphinController* controller);
  49     virtual ~DolphinIconsView();
  50
  51     /** @see QAbstractItemView::visualRect() */
  52     virtual QRect visualRect(const QModelIndex& index) const;
  53
  54 protected:
  55     virtual QStyleOptionViewItem viewOptions() const;
  56     virtual void contextMenuEvent(QContextMenuEvent* event);
  57     virtual void mousePressEvent(QMouseEvent* event);
  58     virtual void startDrag(Qt::DropActions supportedActions);
  59     virtual void dragEnterEvent(QDragEnterEvent* event);
  60     virtual void dragLeaveEvent(QDragLeaveEvent* event);
  61     virtual void dragMoveEvent(QDragMoveEvent* event);
  62     virtual void dropEvent(QDropEvent* event);
  63     virtual void paintEvent(QPaintEvent* event);
  64     virtual void keyPressEvent(QKeyEvent* event);
  65     virtual void wheelEvent(QWheelEvent* event);
  66
  67 private slots:
  68     void slotShowPreviewChanged();
  69     void slotAdditionalInfoChanged();
  70     void zoomIn();
  71     void zoomOut();
  72     void requestActivation();
  73     void updateFont();
  74
  75 private:
  76     bool isZoomInPossible() const;
  77     bool isZoomOutPossible() const;
  78
  79     /** Returns the increased icon size for the size \a size. */
  80     int increasedIconSize(int size) const;
  81
  82     /** Returns the decreased icon size for the size \a size. */
  83     int decreasedIconSize(int size) const;
  84
  85     /**
  86      * Updates the size of the grid depending on the state
  87      * of \a showPreview and \a additionalInfoCount.
  88      */
  89     void updateGridSize(bool showPreview, int additionalInfoCount);
  90
  91     /**
  92      * Returns the number of additional information lines that should
  93      * be shown below the item name.
  94      */
  95     int additionalInfoCount() const;
  96
  97 private:
  98     DolphinController* m_controller;
  99     DolphinCategoryDrawer* m_categoryDrawer;
 100
 101     QFont m_font;
 102     QSize m_decorationSize;
 103     QStyleOptionViewItem::Position m_decorationPosition;
 104     Qt::Alignment m_displayAlignment;
 105
 106     QSize m_itemSize;
 107
 108     bool m_dragging;   // TODO: remove this property when the issue #160611 is solved in Qt 4.4
 109     QRect m_dropRect;  // TODO: remove this property when the issue #160611 is solved in Qt 4.4
 110 };
 111
 112 #endif