src/panels/information/informationpanel.h

   1 /*
   2  * SPDX-FileCopyrightText: 2006-2009 Peter Penz <peter.penz19@gmail.com>
   3  *
   4  * SPDX-License-Identifier: GPL-2.0-or-later
   5  */
   6
   7 #ifndef INFORMATIONPANEL_H
   8 #define INFORMATIONPANEL_H
   9
  10 #include "panels/panel.h"
  11
  12 #include <KFileItem>
  13
  14 class InformationPanelContent;
  15 namespace KIO
  16 {
  17     class Job;
  18 }
  19
  20 /**
  21  * @brief Panel for showing meta information of one ore more selected items.
  22  */
  23 class InformationPanel : public Panel
  24 {
  25     Q_OBJECT
  26
  27 public:
  28     explicit InformationPanel(QWidget* parent = nullptr);
  29     ~InformationPanel() override;
  30
  31 Q_SIGNALS:
  32     void urlActivated(const QUrl& url);
  33
  34 public Q_SLOTS:
  35     /**
  36      * This is invoked to inform the panel that the user has selected a new
  37      * set of items.
  38      */
  39     void setSelection(const KFileItemList& selection);
  40
  41     /**
  42      * Does a delayed request of information for the item \a item.
  43      * If within this delay InformationPanel::setUrl() or InformationPanel::setSelection()
  44      * are invoked, then the request will be skipped. Requesting a delayed item information
  45      * makes sense when hovering items.
  46      */
  47     void requestDelayedItemInfo(const KFileItem& item);
  48
  49 protected:
  50     /** @see Panel::urlChanged() */
  51     bool urlChanged() override;
  52
  53     /** @see QWidget::showEvent() */
  54     void showEvent(QShowEvent* event) override;
  55
  56     /** @see QWidget::resizeEvent() */
  57     void resizeEvent(QResizeEvent* event) override;
  58
  59     /** @see QWidget::contextMenuEvent() */
  60     void contextMenuEvent(QContextMenuEvent* event) override;
  61
  62 private Q_SLOTS:
  63     /**
  64      * Shows the information for the item of the URL which has been provided by
  65      * InformationPanel::requestDelayedItemInfo() and provides default actions.
  66      */
  67     void showItemInfo();
  68
  69     /**
  70      * Shows the information for the currently displayed folder as a result from
  71      * a stat job issued in showItemInfo().
  72      */
  73     void slotFolderStatFinished(KJob* job);
  74
  75     /**
  76      * Triggered if the request for item information has timed out.
  77      * @see InformationPanel::requestDelayedItemInfo()
  78      */
  79     void slotInfoTimeout();
  80
  81     /**
  82      * Resets the information panel to show the current
  83      * URL (InformationPanel::url()). Is called by
  84      * DolphinInformationPanel::markUrlAsInvalid().
  85      */
  86     void reset();
  87
  88     void slotFileRenamed(const QString& source, const QString& dest);
  89     void slotFilesAdded(const QString& directory);
  90     void slotFilesChanged(const QStringList& files);
  91     void slotFilesRemoved(const QStringList& files);
  92     void slotEnteredDirectory(const QString& directory);
  93     void slotLeftDirectory(const QString& directory);
  94
  95 private:
  96     /** Assures that any pending item information request is cancelled. */
  97     void cancelRequest();
  98
  99     /**
 100      * Shows the meta information for the current shown item inside
 101      * a label.
 102      */
 103     void showMetaInfo();
 104
 105     /**
 106      * Returns true, if \a url is equal to the shown URL m_shownUrl.
 107      */
 108     bool isEqualToShownUrl(const QUrl& url) const;
 109
 110     /**
 111      * Marks the URL as invalid and will reset the Information Panel
 112      * after a short delay. The reset is not done synchronously to
 113      * prevent expensive updates during temporary invalid URLs by
 114      * e. g. changing the directory.
 115      */
 116     void markUrlAsInvalid();
 117
 118     /**
 119      * Opens a menu which allows to configure which meta information
 120      * should be shown.
 121      */
 122     void showContextMenu(const QPoint &point);
 123
 124     void init();
 125
 126 private:
 127     bool m_initialized;
 128     QTimer* m_infoTimer;
 129     QTimer* m_urlChangedTimer;
 130     QTimer* m_resetUrlTimer;
 131
 132     // URL that is currently shown in the Information Panel.
 133     QUrl m_shownUrl;
 134
 135     // URL candidate that will replace m_shownURL after a delay.
 136     // Used to remember URLs when hovering items.
 137     QUrl m_urlCandidate;
 138
 139     // URL candidate that is marked as invalid (e. g. because the directory
 140     // has been deleted or the shown item has been renamed). The Information
 141     // Panel will be reset asynchronously to prevent unnecessary resets when
 142     // a directory has been changed.
 143     QUrl m_invalidUrlCandidate;
 144
 145     KFileItem m_fileItem; // file item for m_shownUrl if available (otherwise null)
 146     KFileItemList m_selection;
 147
 148     KIO::Job* m_folderStatJob;
 149
 150     InformationPanelContent* m_content;
 151     bool m_inConfigurationMode = false;
 152 };
 153
 154 #endif // INFORMATIONPANEL_H