src/panels/information/informationpanelcontent.h

   1 /***************************************************************************
   2  *   Copyright (C) 2009-2010 by Peter Penz <peter.penz19@gmail.com>        *
   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 INFORMATIONPANELCONTENT_H
  21 #define INFORMATIONPANELCONTENT_H
  22
  23 #include <KConfig>
  24 #include <KFileItem>
  25 #include <KUrl>
  26 #include <KVBox>
  27
  28 class KFileItemList;
  29 class PhononWidget;
  30 class PixmapViewer;
  31 class PlacesItemModel;
  32 class QPixmap;
  33 class QString;
  34 class QLabel;
  35 class QScrollArea;
  36
  37 namespace Nepomuk2 {
  38     class FileMetaDataWidget;
  39 }
  40
  41 /**
  42  * @brief Manages the widgets that display the meta information
  43 *         for file items of the Information Panel.
  44  */
  45 class InformationPanelContent : public QWidget
  46 {
  47     Q_OBJECT
  48
  49 public:
  50     explicit InformationPanelContent(QWidget* parent = 0);
  51     virtual ~InformationPanelContent();
  52
  53     /**
  54      * Shows the meta information for the item \p item.
  55      * The preview of the item is generated asynchronously,
  56      * the other meta information are fetched synchronously.
  57      */
  58     void showItem(const KFileItem& item);
  59
  60     /**
  61      * Shows the meta information for the items \p items.
  62      */
  63     void showItems(const KFileItemList& items);
  64
  65     /**
  66      * Opens a menu which allows to configure which meta information
  67      * should be shown.
  68      *
  69      * TODO: Move this code to the class InformationPanel
  70      */
  71     void configureSettings(const QList<QAction*>& customContextMenuActions);
  72
  73 signals:
  74     void urlActivated( const KUrl& url );
  75
  76 protected:
  77     /** @see QObject::eventFilter() */
  78     virtual bool eventFilter(QObject* obj, QEvent* event);
  79
  80 private slots:
  81     /**
  82      * Is invoked if no preview is available for the item. In this
  83      * case the icon will be shown.
  84      */
  85     void showIcon(const KFileItem& item);
  86
  87     /**
  88      * Is invoked if a preview is available for the item. The preview
  89      * \a pixmap is shown inside the info page.
  90      */
  91     void showPreview(const KFileItem& item, const QPixmap& pixmap);
  92
  93     /**
  94      * Marks the currently shown preview as outdated
  95      * by greying the content.
  96      */
  97     void markOutdatedPreview();
  98
  99     void slotHasVideoChanged(bool hasVideo);
 100
 101     /**
 102      * Is invoked after the file meta data configuration dialog has been
 103      * closed and refreshes the visibility of the meta data.
 104      */
 105     void refreshMetaData();
 106
 107 private:
 108     /**
 109      * Checks whether the an URL is repesented by a place. If yes,
 110      * then the place icon and name are shown instead of a preview.
 111      * @return True, if the URL represents exactly a place.
 112      * @param url The url to check.
 113      */
 114     bool applyPlace(const KUrl& url);
 115
 116     /**
 117      * Sets the text for the label \a m_nameLabel and assures that the
 118      * text is split in a way that it can be wrapped within the
 119      * label width (QLabel::setWordWrap() does not work if the
 120      * text represents one extremely long word).
 121      */
 122     void setNameLabelText(const QString& text);
 123
 124     /**
 125      * Adjusts the sizes of the widgets dependent on the available
 126      * width given by \p width.
 127      */
 128     void adjustWidgetSizes(int width);
 129
 130 private:
 131     KFileItem m_item;
 132
 133     bool m_pendingPreview;
 134     QTimer* m_outdatedPreviewTimer;
 135
 136     PixmapViewer* m_preview;
 137     PhononWidget* m_phononWidget;
 138     QLabel* m_nameLabel;
 139     Nepomuk2::FileMetaDataWidget* m_metaDataWidget;
 140     QScrollArea* m_metaDataArea;
 141
 142     PlacesItemModel* m_placesItemModel;
 143 };
 144
 145 #endif // INFORMATIONPANELCONTENT_H