src/tooltips/tooltipmanager.h

   1 /*******************************************************************************
   2  *   Copyright (C) 2008 by Konstantin Heil <konst.heil@stud.uni-heidelberg.de> *
   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 TOOLTIPMANAGER_H
  21 #define TOOLTIPMANAGER_H
  22
  23 #include <QObject>
  24 #include <QRect>
  25
  26 #include <kfileitem.h>
  27
  28 class DolphinModel;
  29 class DolphinSortFilterProxyModel;
  30 class QAbstractItemView;
  31 class QModelIndex;
  32 class QTimer;
  33
  34 /**
  35  * @brief Manages the tooltips for an item view.
  36  *
  37  * When hovering an item, a tooltip is shown after
  38  * a short timeout. The tooltip is hidden again when the
  39  * viewport is hovered or the item view has been left.
  40  */
  41 class ToolTipManager : public QObject
  42 {
  43     Q_OBJECT
  44
  45 public:
  46     explicit ToolTipManager(QAbstractItemView* parent,
  47                             DolphinSortFilterProxyModel* model);
  48     virtual ~ToolTipManager();
  49
  50 public slots:
  51     /**
  52      * Hides the currently shown tooltip. Invoking this method is
  53      * only needed when the tooltip should be hidden although
  54      * an item is hovered.
  55      */
  56     void hideTip();
  57
  58 protected:
  59     virtual bool eventFilter(QObject* watched, QEvent* event);
  60
  61 private slots:
  62     void requestToolTip(const QModelIndex& index);
  63     void hideToolTip();
  64     void prepareToolTip();
  65     void startPreviewJob();
  66     void setPreviewPix(const KFileItem& item, const QPixmap& pix);
  67     void previewFailed();
  68
  69 private:
  70     void showToolTip(const QPixmap& pixmap);
  71
  72     /**
  73      * Creates widget that represents the tip content having
  74      * an icon and the meta data information.
  75      */
  76     QWidget* createTipContent(const QPixmap& pixmap) const;
  77
  78     QAbstractItemView* m_view;
  79     DolphinModel* m_dolphinModel;
  80     DolphinSortFilterProxyModel* m_proxyModel;
  81
  82     QTimer* m_timer;
  83     QTimer* m_previewTimer;
  84     QTimer* m_waitOnPreviewTimer;
  85     KFileItem m_item;
  86     QRect m_itemRect;
  87     bool m_generatingPreview;
  88     bool m_hasDefaultIcon;
  89     QPixmap m_previewPixmap;
  90 };
  91
  92 #endif