src/views/dolphindetailsview.h

   1 /***************************************************************************
   2  *   Copyright (C) 2006-2010 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 DOLPHINDETAILSVIEW_H
  21 #define DOLPHINDETAILSVIEW_H
  22
  23 #include "dolphintreeview.h"
  24 #include <QTreeView>
  25 #include <libdolphin_export.h>
  26 #include <views/dolphinview.h>
  27
  28 class DolphinViewController;
  29 class DolphinSortFilterProxyModel;
  30 class ViewExtensionsFactory;
  31
  32 /**
  33  * @brief Represents the details view which shows the name, size,
  34  *        date, permissions, owner and group of an item.
  35  *
  36  * The width of the columns is automatically adjusted in a way
  37  * that full available width of the view is used by stretching the width
  38  * of the name column.
  39  */
  40 class LIBDOLPHINPRIVATE_EXPORT DolphinDetailsView : public DolphinTreeView
  41 {
  42     Q_OBJECT
  43
  44 public:
  45     /**
  46      * @param parent                Parent widget.
  47      * @param dolphinViewController Allows the DolphinDetailsView to control the
  48      *                              DolphinView in a limited way.
  49      * @param viewModeController    Controller that is used by the DolphinView
  50      *                              to control the DolphinDetailsView. The DolphinDetailsView
  51      *                              only has read access to the controller.
  52      * @param model                 Directory that is shown.
  53      */
  54     explicit DolphinDetailsView(QWidget* parent,
  55                                 DolphinViewController* dolphinViewController,
  56                                 const ViewModeController* viewModeController,
  57                                 DolphinSortFilterProxyModel* model);
  58     virtual ~DolphinDetailsView();
  59
  60     /**
  61      * Returns a set containing the URLs of all expanded items.
  62      */
  63     QSet<KUrl> expandedUrls() const;
  64
  65 protected:
  66     virtual bool event(QEvent* event);
  67     virtual QStyleOptionViewItem viewOptions() const;
  68     virtual void contextMenuEvent(QContextMenuEvent* event);
  69     virtual void mousePressEvent(QMouseEvent* event);
  70     virtual void startDrag(Qt::DropActions supportedActions);
  71     virtual void dragEnterEvent(QDragEnterEvent* event);
  72     virtual void dragMoveEvent(QDragMoveEvent* event);
  73     virtual void dropEvent(QDropEvent* event);
  74     virtual void keyPressEvent(QKeyEvent* event);
  75     virtual void resizeEvent(QResizeEvent* event);
  76     virtual void wheelEvent(QWheelEvent* event);
  77     virtual void currentChanged(const QModelIndex& current, const QModelIndex& previous);
  78     virtual bool eventFilter(QObject* watched, QEvent* event);
  79     virtual QRect visualRect(const QModelIndex& index) const;
  80     virtual bool acceptsDrop(const QModelIndex& index) const;
  81
  82 protected slots:
  83     virtual void rowsAboutToBeRemoved(const QModelIndex &parent, int start, int end);
  84
  85 private slots:
  86     /**
  87      * Sets the sort indicator section of the header view
  88      * corresponding to \a sorting.
  89      */
  90     void setSortIndicatorSection(DolphinView::Sorting sorting);
  91
  92     /**
  93      * Sets the sort indicator order of the header view
  94      * corresponding to \a sortOrder.
  95      */
  96     void setSortIndicatorOrder(Qt::SortOrder sortOrder);
  97
  98     /**
  99      * Synchronizes the sorting state of the Dolphin menu 'View -> Sort'
 100      * with the current state of the details view.
 101      * @param column Index of the current sorting column.
 102      */
 103     void synchronizeSortingState(int column);
 104
 105     /**
 106      * Is invoked when the mouse cursor has entered an item. The controller
 107      * gets informed to emit the itemEntered() signal if the mouse cursor
 108      * is above the name column. Otherwise the controller gets informed
 109      * to emit the itemViewportEntered() signal (all other columns should
 110      * behave as viewport area).
 111      */
 112     void slotEntered(const QModelIndex& index);
 113
 114     void setZoomLevel(int level);
 115
 116     void slotShowPreviewChanged();
 117
 118     /**
 119      * Opens a context menu at the position \a pos and allows to
 120      * configure the visibility of the header columns and whether
 121      * expandable folders should be shown.
 122      */
 123     void configureSettings(const QPoint& pos);
 124
 125     /**
 126      * Updates the visibilty state of columns and their order.
 127      */
 128     void updateColumnVisibility();
 129
 130     /**
 131      * Resizes all columns in a way to use the whole available width of the view.
 132      */
 133     void resizeColumns();
 134
 135     /**
 136      * Saves order of the columns as global setting.
 137      */
 138     void saveColumnPositions();
 139
 140     /**
 141      * Disables the automatical resizing of columns, if the user has resized the columns
 142      * with the mouse.
 143      */
 144     void slotHeaderSectionResized(int logicalIndex, int oldSize, int newSize);
 145
 146     /**
 147      * Changes the alternating row colors setting depending from
 148      * the activation state \a active.
 149      */
 150     void slotActivationChanged(bool active);
 151
 152     /**
 153      * Disables the automatical resizing of the columns. Per default all columns
 154      * are resized to use the maximum available width of the view as good as possible.
 155      */
 156     void disableAutoResizing();
 157
 158     void requestActivation();
 159
 160     void slotGlobalSettingsChanged(int category);
 161
 162     /**
 163      * If \a expandable is true, the details view acts as tree view.
 164      * The current expandable state is remembered in the settings.
 165      */
 166     void setFoldersExpandable(bool expandable);
 167
 168     /**
 169      * These slots update the list of expanded items.
 170      */
 171     void slotExpanded(const QModelIndex& index);
 172     void slotCollapsed(const QModelIndex& index);
 173
 174 private:
 175     /**
 176      * Removes the URLs corresponding to the children of \a index in the rows
 177      * between \a start and \a end inclusive from the set of expanded URLs.
 178      */
 179     void removeExpandedIndexes(const QModelIndex& parent, int start, int end);
 180
 181     /**
 182      * Updates the size of the decoration dependent on the
 183      * icon size of the DetailsModeSettings. The controller
 184      * will get informed about possible zoom in/zoom out
 185      * operations.
 186      */
 187     void updateDecorationSize(bool showPreview);
 188
 189     KFileItemDelegate::Information infoForColumn(int columnIndex) const;
 190
 191     /**
 192      * Sets the maximum size available for editing in the delegate.
 193      */
 194     void adjustMaximumSizeForEditing(const QModelIndex& index);
 195
 196 private:
 197     bool m_autoResize; // if true, the columns are resized automatically to the available width
 198
 199     DolphinViewController* m_dolphinViewController;
 200     const ViewModeController* m_viewModeController;
 201     ViewExtensionsFactory* m_extensionsFactory;
 202     QAction* m_expandableFoldersAction;
 203
 204     // A set containing the URLs of all currently expanded folders.
 205     // We cannot use a QSet<QModelIndex> because a QModelIndex is not guaranteed to remain valid over time.
 206     // Also a QSet<QPersistentModelIndex> does not work as expected because it is not guaranteed that
 207     // subsequent expand/collapse events of the same file item will yield the same QPersistentModelIndex.
 208     QSet<KUrl> m_expandedUrls;
 209
 210     QFont m_font;
 211     QSize m_decorationSize;
 212 };
 213
 214 #endif