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 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 QTreeView
  41 {
  42     Q_OBJECT
  43
  44 public:
  45     explicit DolphinDetailsView(QWidget* parent,
  46                                 DolphinController* controller,
  47                                 DolphinSortFilterProxyModel* model);
  48     virtual ~DolphinDetailsView();
  49
  50 protected:
  51     virtual bool event(QEvent* event);
  52     virtual QStyleOptionViewItem viewOptions() const;
  53     virtual void contextMenuEvent(QContextMenuEvent* event);
  54     virtual void mousePressEvent(QMouseEvent* event);
  55     virtual void mouseMoveEvent(QMouseEvent* event);
  56     virtual void mouseReleaseEvent(QMouseEvent* event);
  57     virtual void startDrag(Qt::DropActions supportedActions);
  58     virtual void dragEnterEvent(QDragEnterEvent* event);
  59     virtual void dragLeaveEvent(QDragLeaveEvent* event);
  60     virtual void dragMoveEvent(QDragMoveEvent* event);
  61     virtual void dropEvent(QDropEvent* event);
  62     virtual void paintEvent(QPaintEvent* event);
  63     virtual void keyPressEvent(QKeyEvent* event);
  64     virtual void keyReleaseEvent(QKeyEvent* event);
  65     virtual void resizeEvent(QResizeEvent* event);
  66     virtual void wheelEvent(QWheelEvent* event);
  67     virtual void currentChanged(const QModelIndex& current, const QModelIndex& previous);
  68     virtual bool eventFilter(QObject* watched, QEvent* event);
  69     virtual QModelIndex indexAt (const QPoint& point) const;
  70     virtual void setSelection(const QRect& rect, QItemSelectionModel::SelectionFlags command);
  71     virtual void scrollTo(const QModelIndex& index, ScrollHint hint = EnsureVisible);
  72
  73 private slots:
  74     /**
  75      * Sets the sort indicator section of the header view
  76      * corresponding to \a sorting.
  77      */
  78     void setSortIndicatorSection(DolphinView::Sorting sorting);
  79
  80     /**
  81      * Sets the sort indicator order of the header view
  82      * corresponding to \a sortOrder.
  83      */
  84     void setSortIndicatorOrder(Qt::SortOrder sortOrder);
  85
  86     /**
  87      * Synchronizes the sorting state of the Dolphin menu 'View -> Sort'
  88      * with the current state of the details view.
  89      * @param column Index of the current sorting column.
  90      */
  91     void synchronizeSortingState(int column);
  92
  93     /**
  94      * Is invoked when the mouse cursor has entered an item. The controller
  95      * gets informed to emit the itemEntered() signal if the mouse cursor
  96      * is above the name column. Otherwise the controller gets informed
  97      * to emit the itemViewportEntered() signal (all other columns should
  98      * behave as viewport area).
  99      */
 100     void slotEntered(const QModelIndex& index);
 101
 102     /**
 103      * Updates the destination \a destination from
 104      * the elastic band to the current mouse position and triggers
 105      * an update.
 106      */
 107     void updateElasticBand();
 108
 109     /**
 110      * Returns the rectangle for the elastic band dependent from the
 111      * origin \a origin, the current destination
 112      * \a destination and the viewport position.
 113      */
 114     QRect elasticBandRect() const;
 115
 116     void setZoomLevel(int level);
 117
 118     void slotShowPreviewChanged();
 119
 120     /**
 121      * Opens a context menu at the position \a pos and allows to
 122      * configure the visibility of the header columns and whether
 123      * expandable folders should be shown.
 124      */
 125     void configureSettings(const QPoint& pos);
 126
 127     /**
 128      * Updates the visibilty state of columns and their order.
 129      */
 130     void updateColumnVisibility();
 131
 132     /**
 133      * Saves order of the columns as global setting.
 134      */
 135     void saveColumnPositions();
 136
 137     /**
 138      * Disables the automatical resizing of columns, if the user has resized the columns
 139      * with the mouse.
 140      */
 141     void slotHeaderSectionResized(int logicalIndex, int oldSize, int newSize);
 142
 143     /**
 144      * Changes the alternating row colors setting depending from
 145      * the activation state \a active.
 146      */
 147     void slotActivationChanged(bool active);
 148
 149     /**
 150      * Disables the automatical resizing of the columns. Per default all columns
 151      * are resized to use the maximum available width of the view as good as possible.
 152      */
 153     void disableAutoResizing();
 154
 155     void requestActivation();
 156
 157     void slotGlobalSettingsChanged(int category);
 158
 159     /**
 160      * If the elastic band is currently shown, update the elastic band based on
 161      * the current mouse position and ensure that the selection is the set of items
 162      * intersecting it.
 163      */
 164     void updateElasticBandSelection();
 165
 166     /**
 167      * If \a expandable is true, the details view acts as tree view.
 168      * The current expandable state is remembered in the settings.
 169      */
 170     void setFoldersExpandable(bool expandable);
 171
 172 private:
 173     /**
 174      * Updates the size of the decoration dependent on the
 175      * icon size of the DetailsModeSettings. The controller
 176      * will get informed about possible zoom in/zoom out
 177      * operations.
 178      */
 179     void updateDecorationSize(bool showPreview);
 180
 181     KFileItemDelegate::Information infoForColumn(int columnIndex) const;
 182
 183     /**
 184      * Resizes all columns in a way to use the whole available width of the view.
 185      */
 186     void resizeColumns();
 187
 188     QRect nameColumnRect(const QModelIndex& index) const;
 189
 190     /**
 191      * Returns true, if \a pos is within the expanding toggle of a tree.
 192      */
 193     bool isAboveExpandingToggle(const QPoint& pos) const;
 194
 195 private:
 196     bool m_autoResize : 1;        // if true, the columns are resized automatically to the available width
 197     bool m_expandingTogglePressed : 1;
 198     bool m_keyPressed : 1;        // true if a key is pressed currently; info used by currentChanged()
 199     bool m_useDefaultIndexAt : 1; // true, if QTreeView::indexAt() should be used
 200     bool m_ignoreScrollTo : 1;    // true if calls to scrollTo(...) should do nothing.
 201
 202     DolphinController* m_controller;
 203     ViewExtensionsFactory* m_extensionsFactory;
 204     QAction* m_expandableFoldersAction;
 205
 206     QFont m_font;
 207     QSize m_decorationSize;
 208
 209     QRect m_dropRect;
 210
 211     struct ElasticBand
 212     {
 213         ElasticBand();
 214
 215         // Elastic band origin and destination coordinates are relative to t
 216         // he origin of the view, not the viewport.
 217         bool show;
 218         QPoint origin;
 219         QPoint destination;
 220
 221         // Optimization mechanisms for use with elastic band selection.
 222         // Basically, allow "incremental" updates to the selection based
 223         // on the last elastic band shape.
 224         QPoint lastSelectionOrigin;
 225         QPoint lastSelectionDestination;
 226
 227         // If true, compute the set of selected elements from scratch (slower)
 228         bool ignoreOldInfo;
 229
 230         // Edges of the filenames that are closest to the edges of oldSelectionRect.
 231         // Used to decide whether horizontal changes in the elastic band are likely
 232         // to require us to re-check which items are selected.
 233         int outsideNearestLeftEdge;
 234         int outsideNearestRightEdge;
 235         int insideNearestLeftEdge;
 236         int insideNearestRightEdge;
 237         // The set of items that were selected at the time this band was shown.
 238         // NOTE: Unless CTRL was pressed when the band was created, this is always empty.
 239         QItemSelection originalSelection;
 240     } m_band;
 241 };
 242
 243 #endif