src/dolphincolumnview.h

   1 /***************************************************************************
   2  *   Copyright (C) 2007 by Peter Penz <peter.penz@gmx.at>                  *
   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 DOLPHINCOLUMNVIEW_H
  21 #define DOLPHINCOLUMNVIEW_H
  22
  23 #include <kurl.h>
  24
  25 #include <QAbstractItemView>
  26 #include <QList>
  27 #include <QStyleOption>
  28
  29 class DolphinColumnWidget;
  30 class DolphinController;
  31 class DolphinModel;
  32 class QAbstractProxyModel;
  33 class QTimeLine;
  34
  35 /**
  36  * @brief Represents the view, where each directory is show as separate column.
  37  *
  38  * @see DolphinIconsView
  39  * @see DolphinDetailsView
  40  */
  41 class DolphinColumnView : public QAbstractItemView
  42 {
  43     Q_OBJECT
  44
  45 public:
  46     explicit DolphinColumnView(QWidget* parent, DolphinController* controller);
  47     virtual ~DolphinColumnView();
  48
  49     virtual QModelIndex indexAt(const QPoint& point) const;
  50     virtual void scrollTo(const QModelIndex& index, ScrollHint hint = EnsureVisible);
  51     virtual QRect visualRect(const QModelIndex& index) const;
  52
  53     /** Inverts the selection of the currently active column. */
  54     void invertSelection();
  55
  56     /**
  57      * Reloads the content of all columns. In opposite to non-hierarchical views
  58      * it is not enough to reload the KDirLister, instead this method must be explicitly
  59      * invoked.
  60      */
  61     void reload();
  62
  63     /**
  64      * Adjusts the root URL of the first column and removes all
  65      * other columns.
  66      */
  67     void setRootUrl(const KUrl& url);
  68
  69     /** Returns the URL of the first column. */
  70     KUrl rootUrl() const;
  71
  72 public slots:
  73     /**
  74      * Shows the column which represents the URL \a url. If the column
  75      * is already shown, it gets activated, otherwise it will be created.
  76      */
  77     void showColumn(const KUrl& url);
  78
  79     /** @see QAbstractItemView::selectAll() */
  80     virtual void selectAll();
  81
  82 protected:
  83     virtual bool isIndexHidden(const QModelIndex& index) const;
  84     virtual QModelIndex moveCursor(CursorAction cursorAction, Qt::KeyboardModifiers modifiers);
  85     virtual void setSelection(const QRect& rect, QItemSelectionModel::SelectionFlags flags);
  86     virtual QRegion visualRegionForSelection(const QItemSelection& selection) const;
  87     virtual int horizontalOffset() const;
  88     virtual int verticalOffset() const;
  89
  90     virtual void mousePressEvent(QMouseEvent* event);
  91     virtual void resizeEvent(QResizeEvent* event);
  92
  93 private slots:
  94     void zoomIn();
  95     void zoomOut();
  96
  97     /**
  98      * Moves the content of the columns view to represent
  99      * the scrollbar position \a x.
 100      */
 101     void moveContentHorizontally(int x);
 102
 103     /**
 104      * Updates the size of the decoration dependent on the
 105      * icon size of the ColumnModeSettings. The controller
 106      * will get informed about possible zoom in/zoom out
 107      * operations.
 108      */
 109     void updateDecorationSize();
 110
 111     /**
 112      * Updates the background color of the columns to respect
 113      * the current activation state \a active.
 114      */
 115     void updateColumnsBackground(bool active);
 116
 117     void slotShowHiddenFilesChanged(bool show);
 118     void slotShowPreviewChanged(bool show);
 119
 120 private:
 121     bool isZoomInPossible() const;
 122     bool isZoomOutPossible() const;
 123
 124     DolphinColumnWidget* activeColumn() const;
 125
 126     /**
 127      * Deactivates the currently active column and activates
 128      * the new column indicated by \a index. m_index represents
 129      * the active column afterwards. Also the URL of the navigator
 130      * will be adjusted to reflect the column URL.
 131      */
 132     void setActiveColumnIndex(int index);
 133
 134     void layoutColumns();
 135     void updateScrollBar();
 136
 137     /**
 138      * Assures that the currently active column is fully visible
 139      * by adjusting the horizontal position of the content.
 140      */
 141     void assureVisibleActiveColumn();
 142
 143     /**
 144      * Request the activation for the column \a column. It is assured
 145      * that the columns gets fully visible by adjusting the horizontal
 146      * position of the content.
 147      */
 148     void requestActivation(DolphinColumnWidget* column);
 149
 150     /** Removes all columns except of the root column. */
 151     void removeAllColumns();
 152
 153 private:
 154     DolphinController* m_controller;
 155     bool m_active;
 156     int m_index;
 157     int m_contentX;
 158     QList<DolphinColumnWidget*> m_columns;
 159     QTimeLine* m_animation;
 160
 161     friend class DolphinColumnWidget;
 162 };
 163
 164 inline DolphinColumnWidget* DolphinColumnView::activeColumn() const
 165 {
 166     return m_columns[m_index];
 167 }
 168
 169 #endif