src/dolphindetailsview.h

   1 /***************************************************************************
   2  *   Copyright (C) 2006 by Peter Penz (peter.penz@gmx.at)                  *
   3  *   Copyright (C) 2008 by Simon St. James (kdedevel@etotheipiplusone.com) *
   4  *                                                                         *
   5  *   This program is free software; you can redistribute it and/or modify  *
   6  *   it under the terms of the GNU General Public License as published by  *
   7  *   the Free Software Foundation; either version 2 of the License, or     *
   8  *   (at your option) any later version.                                   *
   9  *                                                                         *
  10  *   This program is distributed in the hope that it will be useful,       *
  11  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  12  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  13  *   GNU General Public License for more details.                          *
  14  *                                                                         *
  15  *   You should have received a copy of the GNU General Public License     *
  16  *   along with this program; if not, write to the                         *
  17  *   Free Software Foundation, Inc.,                                       *
  18  *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA            *
  19  ***************************************************************************/
  20
  21 #ifndef DOLPHINDETAILSVIEW_H
  22 #define DOLPHINDETAILSVIEW_H
  23
  24 #include <dolphinview.h>
  25 #include <QTreeView>
  26 #include <libdolphin_export.h>
  27
  28 class DolphinController;
  29 class SelectionManager;
  30 class DolphinSortFilterProxyModel;
  31 class DolphinViewAutoScroller;
  32 class ViewExtensionsFactory;
  33
  34 /**
  35  * @brief Represents the details view which shows the name, size,
  36  *        date, permissions, owner and group of an item.
  37  *
  38  * The width of the columns is automatically adjusted in a way
  39  * that full available width of the view is used by stretching the width
  40  * of the name column.
  41  */
  42 class LIBDOLPHINPRIVATE_EXPORT DolphinDetailsView : public QTreeView
  43 {
  44     Q_OBJECT
  45
  46 public:
  47     explicit DolphinDetailsView(QWidget* parent,
  48                                 DolphinController* controller,
  49                                 DolphinSortFilterProxyModel* model);
  50     virtual ~DolphinDetailsView();
  51
  52 protected:
  53     virtual bool event(QEvent* event);
  54     virtual QStyleOptionViewItem viewOptions() const;
  55     virtual void contextMenuEvent(QContextMenuEvent* event);
  56     virtual void mousePressEvent(QMouseEvent* event);
  57     virtual void mouseMoveEvent(QMouseEvent* event);
  58     virtual void mouseReleaseEvent(QMouseEvent* event);
  59     virtual void startDrag(Qt::DropActions supportedActions);
  60     virtual void dragEnterEvent(QDragEnterEvent* event);
  61     virtual void dragLeaveEvent(QDragLeaveEvent* event);
  62     virtual void dragMoveEvent(QDragMoveEvent* event);
  63     virtual void dropEvent(QDropEvent* event);
  64     virtual void paintEvent(QPaintEvent* event);
  65     virtual void keyPressEvent(QKeyEvent* event);
  66     virtual void keyReleaseEvent(QKeyEvent* event);
  67     virtual void resizeEvent(QResizeEvent* event);
  68     virtual void wheelEvent(QWheelEvent* event);
  69     virtual void currentChanged(const QModelIndex& current, const QModelIndex& previous);
  70     virtual bool eventFilter(QObject* watched, QEvent* event);
  71     virtual QModelIndex indexAt (const QPoint& point) const;
  72     virtual void setSelection(const QRect& rect, QItemSelectionModel::SelectionFlags command);
  73     virtual void scrollTo(const QModelIndex& index, ScrollHint hint = EnsureVisible);
  74
  75 private slots:
  76     /**
  77      * Sets the sort indicator section of the header view
  78      * corresponding to \a sorting.
  79      */
  80     void setSortIndicatorSection(DolphinView::Sorting sorting);
  81
  82     /**
  83      * Sets the sort indicator order of the header view
  84      * corresponding to \a sortOrder.
  85      */
  86     void setSortIndicatorOrder(Qt::SortOrder sortOrder);
  87
  88     /**
  89      * Synchronizes the sorting state of the Dolphin menu 'View -> Sort'
  90      * with the current state of the details view.
  91      * @param column Index of the current sorting column.
  92      */
  93     void synchronizeSortingState(int column);
  94
  95     /**
  96      * Is invoked when the mouse cursor has entered an item. The controller
  97      * gets informed to emit the itemEntered() signal if the mouse cursor
  98      * is above the name column. Otherwise the controller gets informed
  99      * to emit the itemViewportEntered() signal (all other columns should
 100      * behave as viewport area).
 101      */
 102     void slotEntered(const QModelIndex& index);
 103
 104     /**
 105      * Updates the destination \a destination from
 106      * the elastic band to the current mouse position and triggers
 107      * an update.
 108      */
 109     void updateElasticBand();
 110
 111     /**
 112      * Returns the rectangle for the elastic band dependent from the
 113      * origin \a origin, the current destination
 114      * \a destination and the viewport position.
 115      */
 116     QRect elasticBandRect() const;
 117
 118     void setNameFilter(const QString& nameFilter);
 119
 120     void setZoomLevel(int level);
 121
 122     void slotShowPreviewChanged();
 123
 124     /**
 125      * Opens a context menu at the position \a pos and allows to
 126      * configure the visibility of the header columns and whether
 127      * expandable folders should be shown.
 128      */
 129     void configureSettings(const QPoint& pos);
 130
 131     /**
 132      * Updates the visibilty state of columns and their order.
 133      */
 134     void updateColumnVisibility();
 135
 136     /**
 137      * Saves order of the columns as global setting.
 138      */
 139     void saveColumnPositions();
 140
 141     /**
 142      * Disables the automatical resizing of columns, if the user has resized the columns
 143      * with the mouse.
 144      */
 145     void slotHeaderSectionResized(int logicalIndex, int oldSize, int newSize);
 146
 147     /**
 148      * Changes the alternating row colors setting depending from
 149      * the activation state \a active.
 150      */
 151     void slotActivationChanged(bool active);
 152
 153     /**
 154      * Disables the automatical resizing of the columns. Per default all columns
 155      * are resized to use the maximum available width of the view as good as possible.
 156      */
 157     void disableAutoResizing();
 158
 159     void requestActivation();
 160
 161     void slotGlobalSettingsChanged(int category);
 162
 163     /**
 164      * If the elastic band is currently shown, update the elastic band based on
 165      * the current mouse position and ensure that the selection is the set of items
 166      * intersecting it.
 167      */
 168     void updateElasticBandSelection();
 169
 170     /**
 171      * If \a expandable is true, the details view acts as tree view.
 172      * The current expandable state is remembered in the settings.
 173      */
 174     void setFoldersExpandable(bool expandable);
 175
 176 private:
 177     /**
 178      * Updates the size of the decoration dependent on the
 179      * icon size of the DetailsModeSettings. The controller
 180      * will get informed about possible zoom in/zoom out
 181      * operations.
 182      */
 183     void updateDecorationSize(bool showPreview);
 184
 185     KFileItemDelegate::Information infoForColumn(int columnIndex) const;
 186
 187     /**
 188      * Resizes all columns in a way to use the whole available width of the view.
 189      */
 190     void resizeColumns();
 191
 192     QRect nameColumnRect(const QModelIndex& index) const;
 193
 194     /**
 195      * Returns true, if \a pos is within the expanding toggle of a tree.
 196      */
 197     bool isAboveExpandingToggle(const QPoint& pos) const;
 198
 199 private:
 200     bool m_autoResize : 1;        // if true, the columns are resized automatically to the available width
 201     bool m_expandingTogglePressed : 1;
 202     bool m_keyPressed : 1;        // true if a key is pressed currently; info used by currentChanged()
 203     bool m_useDefaultIndexAt : 1; // true, if QTreeView::indexAt() should be used
 204     bool m_ignoreScrollTo : 1;    // true if calls to scrollTo(...) should do nothing.
 205
 206     DolphinController* m_controller;
 207     SelectionManager* m_selectionManager;
 208     DolphinViewAutoScroller* m_autoScroller;
 209     ViewExtensionsFactory* m_extensionsFactory;
 210     QAction* m_expandableFoldersAction;
 211
 212     QFont m_font;
 213     QSize m_decorationSize;
 214
 215     QRect m_dropRect;
 216
 217     struct ElasticBand
 218     {
 219         ElasticBand();
 220
 221         // Elastic band origin and destination coordinates are relative to t
 222         // he origin of the view, not the viewport.
 223         bool show;
 224         QPoint origin;
 225         QPoint destination;
 226
 227         // Optimization mechanisms for use with elastic band selection.
 228         // Basically, allow "incremental" updates to the selection based
 229         // on the last elastic band shape.
 230         QPoint lastSelectionOrigin;
 231         QPoint lastSelectionDestination;
 232
 233         // If true, compute the set of selected elements from scratch (slower)
 234         bool ignoreOldInfo;
 235
 236         // Edges of the filenames that are closest to the edges of oldSelectionRect.
 237         // Used to decide whether horizontal changes in the elastic band are likely
 238         // to require us to re-check which items are selected.
 239         int outsideNearestLeftEdge;
 240         int outsideNearestRightEdge;
 241         int insideNearestLeftEdge;
 242         int insideNearestRightEdge;
 243         // The set of items that were selected at the time this band was shown.
 244         // NOTE: Unless CTRL was pressed when the band was created, this is always empty.
 245         QItemSelection originalSelection;
 246     } m_band;
 247 };
 248
 249 #endif