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
  31 /**
  32  * @brief Represents the details view which shows the name, size,
  33  *        date, permissions, owner and group of an item.
  34  *
  35  * The width of the columns is automatically adjusted in a way
  36  * that full available width of the view is used by stretching the width
  37  * of the name column.
  38  */
  39 class LIBDOLPHINPRIVATE_EXPORT DolphinDetailsView : public QTreeView
  40 {
  41     Q_OBJECT
  42
  43 public:
  44     explicit DolphinDetailsView(QWidget* parent, DolphinController* controller);
  45     virtual ~DolphinDetailsView();
  46
  47 protected:
  48     virtual bool event(QEvent* event);
  49     virtual QStyleOptionViewItem viewOptions() const;
  50     virtual void contextMenuEvent(QContextMenuEvent* event);
  51     virtual void mousePressEvent(QMouseEvent* event);
  52     virtual void mouseMoveEvent(QMouseEvent* event);
  53     virtual void mouseReleaseEvent(QMouseEvent* event);
  54     virtual void startDrag(Qt::DropActions supportedActions);
  55     virtual void dragEnterEvent(QDragEnterEvent* event);
  56     virtual void dragLeaveEvent(QDragLeaveEvent* event);
  57     virtual void dragMoveEvent(QDragMoveEvent* event);
  58     virtual void dropEvent(QDropEvent* event);
  59     virtual void paintEvent(QPaintEvent* event);
  60     virtual void keyPressEvent(QKeyEvent* event);
  61     virtual void keyReleaseEvent(QKeyEvent* event);
  62     virtual void resizeEvent(QResizeEvent* event);
  63     virtual void wheelEvent(QWheelEvent* event);
  64     virtual void currentChanged(const QModelIndex& current, const QModelIndex& previous);
  65     virtual bool eventFilter(QObject* watched, QEvent* event);
  66     virtual QModelIndex indexAt (const QPoint& point) const;
  67     virtual void setSelection(const QRect& rect, QItemSelectionModel::SelectionFlags command);
  68     virtual void scrollTo (const QModelIndex & index, ScrollHint hint = EnsureVisible);
  69
  70 private slots:
  71     /**
  72      * Sets the sort indicator section of the header view
  73      * corresponding to \a sorting.
  74      */
  75     void setSortIndicatorSection(DolphinView::Sorting sorting);
  76
  77     /**
  78      * Sets the sort indicator order of the header view
  79      * corresponding to \a sortOrder.
  80      */
  81     void setSortIndicatorOrder(Qt::SortOrder sortOrder);
  82
  83     /**
  84      * Synchronizes the sorting state of the Dolphin menu 'View -> Sort'
  85      * with the current state of the details view.
  86      * @param column Index of the current sorting column.
  87      */
  88     void synchronizeSortingState(int column);
  89
  90     /**
  91      * Is invoked when the mouse cursor has entered an item. The controller
  92      * gets informed to emit the itemEntered() signal if the mouse cursor
  93      * is above the name column. Otherwise the controller gets informed
  94      * to emit the itemViewportEntered() signal (all other columns should
  95      * behave as viewport area).
  96      */
  97     void slotEntered(const QModelIndex& index);
  98
  99     /**
 100      * Updates the destination \a destination from
 101      * the elastic band to the current mouse position and triggers
 102      * an update.
 103      */
 104     void updateElasticBand();
 105
 106     /**
 107      * Returns the rectangle for the elastic band dependent from the
 108      * origin \a origin, the current destination
 109      * \a destination and the viewport position.
 110      */
 111     QRect elasticBandRect() const;
 112
 113     void setZoomLevel(int level);
 114
 115     void slotShowPreviewChanged();
 116
 117     /**
 118      * Opens a context menu at the position \a pos and allows to
 119      * configure the visibility of the header columns.
 120      */
 121     void configureColumns(const QPoint& pos);
 122
 123     void updateColumnVisibility();
 124
 125     /**
 126      * Disables the automatical resizing of columns, if the user has resized the columns
 127      * with the mouse.
 128      */
 129     void slotHeaderSectionResized(int logicalIndex, int oldSize, int newSize);
 130
 131     /**
 132      * Changes the alternating row colors setting depending from
 133      * the activation state \a active.
 134      */
 135     void slotActivationChanged(bool active);
 136
 137     /**
 138      * Disables the automatical resizing of the columns. Per default all columns
 139      * are resized to use the maximum available width of the view as good as possible.
 140      */
 141     void disableAutoResizing();
 142
 143     void requestActivation();
 144
 145     void updateFont();
 146
 147     /**
 148      * If the elastic band is currently shown, update the elastic band based on
 149      * the current mouse position and ensure that the selection is the set of items
 150      * intersecting it.
 151      */
 152     void updateElasticBandSelection();
 153
 154 private:
 155     /**
 156      * Updates the size of the decoration dependent on the
 157      * icon size of the DetailsModeSettings. The controller
 158      * will get informed about possible zoom in/zoom out
 159      * operations.
 160      */
 161     void updateDecorationSize(bool showPreview);
 162
 163     /** Return the upper left position in pixels of the viewport content. */
 164     QPoint contentsPos() const;
 165
 166     KFileItemDelegate::Information infoForColumn(int columnIndex) const;
 167
 168     /**
 169      * Resizes all columns in a way to use the whole available width of the view.
 170      */
 171     void resizeColumns();
 172
 173     QRect nameColumnRect(const QModelIndex& index) const;
 174
 175 private:
 176     bool m_autoResize : 1;        // if true, the columns are resized automatically to the available width
 177     bool m_expandingTogglePressed : 1;
 178     bool m_keyPressed : 1;        // true if a key is pressed currently; info used by currentChanged()
 179     bool m_useDefaultIndexAt : 1; // true, if QTreeView::indexAt() should be used
 180     bool m_ignoreScrollTo : 1;    // true if calls to scrollTo(...) should do nothing.
 181
 182     DolphinController* m_controller;
 183     SelectionManager* m_selectionManager;
 184
 185     QFont m_font;
 186     QSize m_decorationSize;
 187
 188     QRect m_dropRect;
 189
 190     struct ElasticBand
 191     {
 192         ElasticBand();
 193
 194         // Elastic band coordinates are relative to the origin of the
 195         // view, not the viewport.
 196         bool show;
 197         QPoint origin;
 198         QPoint destination;
 199
 200         // Optimisation mechanisms for use with elastic band selection.
 201         // Basically, allow "incremental" updates to the selection based
 202         // on the last elastic band shape.
 203         QRect oldSelectionRect;
 204
 205         // If true, compute the set of selected elements from scratch (slower)
 206         bool ignoreOldInfo;
 207
 208         // Edges of the filenames that are closest to the edges of oldSelectionRect.
 209         // Used to decide whether horizontal changes in the elastic band are likely
 210         // to require us to re-check which items are selected.
 211         int outsideNearestLeftEdge;
 212         int outsideNearestRightEdge;
 213         int insideNearestLeftEdge;
 214         int insideNearestRightEdge;
 215         // The set of items that were selected at the time this band was shown.
 216         // NOTE: Unless CTRL was pressed when the band was created, this is always empty.
 217         QItemSelection originalSelection;
 218     } m_band;
 219 };
 220
 221 #endif