src/infosidebarpage.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 INFOSIDEBARPAGE_H
  21 #define INFOSIDEBARPAGE_H
  22
  23 #include <sidebarpage.h>
  24
  25 #include <QtGui/QPushButton>
  26 #include <QtGui/QPixmap>
  27 #include <QtCore/QEvent>
  28 #include <QtGui/QLabel>
  29 #include <QtCore/QList>
  30
  31 #include <kurl.h>
  32 #include <kmimetype.h>
  33 #include <kdesktopfileactions.h>
  34 #include <kvbox.h>
  35
  36 class QPixmap;
  37 class QString;
  38 class KFileItem;
  39 class QLabel;
  40 class PixmapViewer;
  41 class MetaDataWidget;
  42
  43 /**
  44  * @brief Sidebar for showing meta information of one ore more selected items.
  45  */
  46 class InfoSidebarPage : public SidebarPage
  47 {
  48     Q_OBJECT
  49
  50 public:
  51     explicit InfoSidebarPage(QWidget* parent = 0);
  52     virtual ~InfoSidebarPage();
  53
  54     /** @see QWidget::sizeHint() */
  55     virtual QSize sizeHint() const;
  56
  57 public slots:
  58     /** @see SidebarPage::setUrl() */
  59     virtual void setUrl(const KUrl& url);
  60
  61     /** @see SidebarPage::setSelection() */
  62     virtual void setSelection(const KFileItemList& selection);
  63
  64     /**
  65      * Does a delayed request of information for the item \a item.
  66      * If within this delay InfoSidebarPage::setUrl() or InfoSidebarPage::setSelection()
  67      * are invoked, then the request will be skipped. Requesting a delayed item information
  68      * makes sense when hovering items.
  69      */
  70     void requestDelayedItemInfo(const KFileItem& item);
  71
  72 protected:
  73     /** @see QWidget::showEvent() */
  74     virtual void showEvent(QShowEvent* event);
  75
  76     /** @see QWidget::resizeEvent() */
  77     virtual void resizeEvent(QResizeEvent* event);
  78
  79 private slots:
  80     /**
  81      * Shows the information for the item of the URL which has been provided by
  82      * InfoSidebarPage::requestItemInfo() and provides default actions.
  83      */
  84     void showItemInfo();
  85
  86     /**
  87      * Triggered if the request for item information has timed out.
  88      * @see InfoSidebarPage::requestDelayedItemInfo()
  89      */
  90     void slotTimeout();
  91
  92     /**
  93      * Is invoked if no preview is available for the item. In this
  94      * case the icon will be shown.
  95      */
  96     void showIcon(const KFileItem& item);
  97
  98     /**
  99      * Is invoked if a preview is available for the item. The preview
 100      * \a pixmap is shown inside the info page.
 101      */
 102     void showPreview(const KFileItem& item, const QPixmap& pixmap);
 103
 104 private:
 105     enum { TimerDelay = 300 };
 106
 107     /**
 108      * Checks whether the an URL is repesented by a place. If yes,
 109      * then the place icon and name are shown instead of a preview.
 110      * @return True, if the URL represents exactly a place.
 111      * @param url The url to check.
 112      */
 113     bool applyPlace(const KUrl& url);
 114
 115     /** Assures that any pending item information request is cancelled. */
 116     void cancelRequest();
 117
 118     /**
 119      * Shows the meta information for the current shown item inside
 120      * a label.
 121      */
 122     void showMetaInfo();
 123
 124     /**
 125      * Adds the texts \a labelText and \a infoText as one formated line
 126      * to text.
 127      */
 128     void addInfoLine(QString& text,
 129                      const QString& labelText,
 130                      const QString& infoText);
 131
 132     /**
 133      * Converts the meta key \a key to a readable format into \a text.
 134      * Returns true, if the string \a key represents a meta information
 135      * that should be shown. If false is returned, \a text is not modified.
 136      */
 137     bool convertMetaInfo(const QString& key, QString& text) const;
 138
 139 private:
 140     bool m_pendingPreview;
 141     QTimer* m_timer;
 142     KUrl m_shownUrl;
 143     KUrl m_urlCandidate;
 144
 145     PixmapViewer* m_preview;
 146     QLabel* m_nameLabel;
 147
 148     QLabel* m_infoLabel;
 149
 150     MetaDataWidget* m_metadataWidget;
 151 };
 152
 153 #endif // INFOSIDEBARPAGE_H