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 DolphinViewAutoScroller;
  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 QTreeView
  41 {
  42     Q_OBJECT
  43
  44 public:
  45     explicit DolphinDetailsView(QWidget* parent, DolphinController* controller);
  46     virtual ~DolphinDetailsView();
  47
  48 protected:
  49     virtual bool event(QEvent* event);
  50     virtual QStyleOptionViewItem viewOptions() const;
  51     virtual void contextMenuEvent(QContextMenuEvent* event);
  52     virtual void mousePressEvent(QMouseEvent* event);
  53     virtual void mouseMoveEvent(QMouseEvent* event);
  54     virtual void mouseReleaseEvent(QMouseEvent* event);
  55     virtual void startDrag(Qt::DropActions supportedActions);
  56     virtual void dragEnterEvent(QDragEnterEvent* event);
  57     virtual void dragLeaveEvent(QDragLeaveEvent* event);
  58     virtual void dragMoveEvent(QDragMoveEvent* event);
  59     virtual void dropEvent(QDropEvent* event);
  60     virtual void paintEvent(QPaintEvent* event);
  61     virtual void keyPressEvent(QKeyEvent* event);
  62     virtual void keyReleaseEvent(QKeyEvent* event);
  63     virtual void resizeEvent(QResizeEvent* event);
  64     virtual void wheelEvent(QWheelEvent* event);
  65     virtual void currentChanged(const QModelIndex& current, const QModelIndex& previous);
  66     virtual bool eventFilter(QObject* watched, QEvent* event);
  67     virtual QModelIndex indexAt (const QPoint& point) const;
  68     virtual void setSelection(const QRect& rect, QItemSelectionModel::SelectionFlags command);
  69     virtual void scrollTo(const QModelIndex& index, ScrollHint hint = EnsureVisible);
  70
  71 private slots:
  72     /**
  73      * Sets the sort indicator section of the header view
  74      * corresponding to \a sorting.
  75      */
  76     void setSortIndicatorSection(DolphinView::Sorting sorting);
  77
  78     /**
  79      * Sets the sort indicator order of the header view
  80      * corresponding to \a sortOrder.
  81      */
  82     void setSortIndicatorOrder(Qt::SortOrder sortOrder);
  83
  84     /**
  85      * Synchronizes the sorting state of the Dolphin menu 'View -> Sort'
  86      * with the current state of the details view.
  87      * @param column Index of the current sorting column.
  88      */
  89     void synchronizeSortingState(int column);
  90
  91     /**
  92      * Is invoked when the mouse cursor has entered an item. The controller
  93      * gets informed to emit the itemEntered() signal if the mouse cursor
  94      * is above the name column. Otherwise the controller gets informed
  95      * to emit the itemViewportEntered() signal (all other columns should
  96      * behave as viewport area).
  97      */
  98     void slotEntered(const QModelIndex& index);
  99
 100     /**
 101      * Updates the destination \a destination from
 102      * the elastic band to the current mouse position and triggers
 103      * an update.
 104      */
 105     void updateElasticBand();
 106
 107     /**
 108      * Returns the rectangle for the elastic band dependent from the
 109      * origin \a origin, the current destination
 110      * \a destination and the viewport position.
 111      */
 112     QRect elasticBandRect() const;
 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     void updateColumnVisibility();
 126
 127     /**
 128      * Disables the automatical resizing of columns, if the user has resized the columns
 129      * with the mouse.
 130      */
 131     void slotHeaderSectionResized(int logicalIndex, int oldSize, int newSize);
 132
 133     /**
 134      * Changes the alternating row colors setting depending from
 135      * the activation state \a active.
 136      */
 137     void slotActivationChanged(bool active);
 138
 139     /**
 140      * Disables the automatical resizing of the columns. Per default all columns
 141      * are resized to use the maximum available width of the view as good as possible.
 142      */
 143     void disableAutoResizing();
 144
 145     void requestActivation();
 146
 147     void slotGlobalSettingsChanged(int category);
 148
 149     /**
 150      * If the elastic band is currently shown, update the elastic band based on
 151      * the current mouse position and ensure that the selection is the set of items
 152      * intersecting it.
 153      */
 154     void updateElasticBandSelection();
 155
 156     /**
 157      * If \a expandable is true, the details view acts as tree view.
 158      * The current expandable state is remembered in the settings.
 159      */
 160     void setFoldersExpandable(bool expandable);
 161
 162 private:
 163     /**
 164      * Updates the size of the decoration dependent on the
 165      * icon size of the DetailsModeSettings. The controller
 166      * will get informed about possible zoom in/zoom out
 167      * operations.
 168      */
 169     void updateDecorationSize(bool showPreview);
 170
 171     KFileItemDelegate::Information infoForColumn(int columnIndex) const;
 172
 173     /**
 174      * Resizes all columns in a way to use the whole available width of the view.
 175      */
 176     void resizeColumns();
 177
 178     QRect nameColumnRect(const QModelIndex& index) const;
 179
 180 private:
 181     bool m_autoResize : 1;        // if true, the columns are resized automatically to the available width
 182     bool m_expandingTogglePressed : 1;
 183     bool m_keyPressed : 1;        // true if a key is pressed currently; info used by currentChanged()
 184     bool m_useDefaultIndexAt : 1; // true, if QTreeView::indexAt() should be used
 185     bool m_ignoreScrollTo : 1;    // true if calls to scrollTo(...) should do nothing.
 186
 187     DolphinController* m_controller;
 188     SelectionManager* m_selectionManager;
 189     DolphinViewAutoScroller* m_autoScroller;
 190     QAction* m_expandableFoldersAction;
 191
 192     QFont m_font;
 193     QSize m_decorationSize;
 194
 195     QRect m_dropRect;
 196
 197     struct ElasticBand
 198     {
 199         ElasticBand();
 200
 201         // Elastic band origin and destination coordinates are relative to t
 202         // he origin of the view, not the viewport.
 203         bool show;
 204         QPoint origin;
 205         QPoint destination;
 206
 207         // Optimization mechanisms for use with elastic band selection.
 208         // Basically, allow "incremental" updates to the selection based
 209         // on the last elastic band shape.
 210         QPoint lastSelectionOrigin;
 211         QPoint lastSelectionDestination;
 212
 213         // If true, compute the set of selected elements from scratch (slower)
 214         bool ignoreOldInfo;
 215
 216         // Edges of the filenames that are closest to the edges of oldSelectionRect.
 217         // Used to decide whether horizontal changes in the elastic band are likely
 218         // to require us to re-check which items are selected.
 219         int outsideNearestLeftEdge;
 220         int outsideNearestRightEdge;
 221         int insideNearestLeftEdge;
 222         int insideNearestRightEdge;
 223         // The set of items that were selected at the time this band was shown.
 224         // NOTE: Unless CTRL was pressed when the band was created, this is always empty.
 225         QItemSelection originalSelection;
 226     } m_band;
 227 };
 228
 229 #endif