src/dolphinview.h

   1 /***************************************************************************
   2  *   Copyright (C) 2006 by Peter Penz <peter.penz@gmx.at>                  *
   3  *   Copyright (C) 2006 by Gregor Kališnik <gregor@podnapisi.net>          *
   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
  22 #ifndef DOLPHINVIEW_H
  23 #define DOLPHINVIEW_H
  24
  25 #include <config-nepomuk.h>
  26
  27 #include "libdolphin_export.h"
  28
  29 #include <kparts/part.h>
  30 #include <kfileitem.h>
  31 #include <kfileitemdelegate.h>
  32 #include <kio/job.h>
  33
  34 #include <QBoxLayout>
  35 #include <QKeyEvent>
  36 #include <QLinkedList>
  37 #include <QListView>
  38 #include <QWidget>
  39
  40 class KToggleAction;
  41 class DolphinController;
  42 class KDirLister;
  43 class KFileItemDelegate;
  44 class KUrl;
  45 class DolphinModel;
  46 class DolphinColumnView;
  47 class DolphinDetailsView;
  48 class DolphinIconsView;
  49 class DolphinMainWindow;
  50 class DolphinSortFilterProxyModel;
  51 class QModelIndex;
  52 class ViewProperties;
  53
  54 /**
  55  * @short Represents a view for the directory content.
  56  *
  57  * View modes for icons, details and columns are supported. It's
  58  * possible to adjust:
  59  * - sort order
  60  * - sort type
  61  * - show hidden files
  62  * - show previews
  63  *
  64  * @see DolphinIconsView
  65  * @see DolphinDetailsView
  66  * @see DolphinColumnView
  67  */
  68 class LIBDOLPHINPRIVATE_EXPORT DolphinView : public QWidget
  69 {
  70     Q_OBJECT
  71
  72 public:
  73     /**
  74         * Defines the view mode for a directory. The view mode
  75         * can be defined when constructing a DolphinView. The
  76         * view mode is automatically updated if the directory itself
  77         * defines a view mode (see class ViewProperties for details).
  78         */
  79     enum Mode
  80     {
  81         /**
  82          * The directory items are shown as icons including an
  83          * icon name. */
  84         IconsView = 0,
  85
  86         /**
  87          * The icon, the name and at least the size of the directory
  88          * items are shown in a table. It is possible to add columns
  89          * for date, group and permissions.
  90          */
  91         DetailsView = 1,
  92
  93         /**
  94          * Each folder is shown in a separate column.
  95          */
  96         ColumnView = 2,
  97         MaxModeEnum = ColumnView
  98     };
  99
 100     /** Defines the sort order for the items of a directory. */
 101     enum Sorting
 102     {
 103         SortByName = 0,
 104         SortBySize,
 105         SortByDate,
 106         SortByPermissions,
 107         SortByOwner,
 108         SortByGroup,
 109         SortByType,
 110         SortByRating,
 111         SortByTags,
 112         MaxSortEnum = SortByTags
 113     };
 114
 115     /**
 116      * @param parent          Parent widget of the view.
 117      * @param url             Specifies the content which should be shown.
 118      * @param dirLister       Used directory lister. The lister is not owned
 119      *                        by the view and won't get deleted.
 120      * @param dolphinModel    Used directory model. The model is not owned
 121      *                        by the view and won't get deleted.
 122      * @param proxyModel      Used proxy model which specifies the sorting. The
 123      *                        model is not owned by the view and won't get
 124      *                        deleted.
 125      */
 126     DolphinView(QWidget* parent,
 127                 const KUrl& url,
 128                 KDirLister* dirLister,
 129                 DolphinModel* dolphinModel,
 130                 DolphinSortFilterProxyModel* proxyModel);
 131
 132     virtual ~DolphinView();
 133
 134     /**
 135      * Returns the current active URL, where all actions are applied.
 136      * The URL navigator is synchronized with this URL.
 137      */
 138     const KUrl& url() const;
 139
 140     /**
 141      * Returns the root URL of the view, which is defined as the first
 142      * visible path of DolphinView::url(). Usually the root URL is
 143      * equal to DolphinView::url(), but in the case of the column view
 144      * when 2 columns are shown, the root URL might be:
 145      * /home/peter/Documents
 146      * and DolphinView::url() might return
 147      * /home/peter/Documents/Music/
 148      */
 149     KUrl rootUrl() const;
 150
 151     /**
 152      * If \a active is true, the view will marked as active. The active
 153      * view is defined as view where all actions are applied to.
 154      */
 155     void setActive(bool active);
 156     bool isActive() const;
 157
 158     /**
 159      * Changes the view mode for the current directory to \a mode.
 160      * If the view properties should be remembered for each directory
 161      * (GeneralSettings::globalViewProps() returns false), then the
 162      * changed view mode will be be stored automatically.
 163      */
 164     void setMode(Mode mode);
 165     Mode mode() const;
 166
 167     /**
 168      * Turns on the file preview for the all files of the current directory,
 169      * if \a show is true.
 170      * If the view properties should be remembered for each directory
 171      * (GeneralSettings::globalViewProps() returns false), then the
 172      * preview setting will be be stored automatically.
 173      */
 174     void setShowPreview(bool show);
 175     bool showPreview() const;
 176
 177     /**
 178      * Shows all hidden files of the current directory,
 179      * if \a show is true.
 180      * If the view properties should be remembered for each directory
 181      * (GeneralSettings::globalViewProps() returns false), then the
 182      * show hidden file setting will be be stored automatically.
 183      */
 184     void setShowHiddenFiles(bool show);
 185     bool showHiddenFiles() const;
 186
 187     /**
 188      * Summarizes all sorted items by their category \a categorized
 189      * is true.
 190      * If the view properties should be remembered for each directory
 191      * (GeneralSettings::globalViewProps() returns false), then the
 192      * categorized sorting setting will be be stored automatically.
 193      */
 194     void setCategorizedSorting(bool categorized);
 195     bool categorizedSorting() const;
 196
 197     /**
 198      * Returns true, if the categorized sorting is supported by the current
 199      * used mode (see DolphinView::setMode()). Currently only DolphinView::IconsView
 200      * supports categorizations. To check whether the categorized
 201      * sorting is set, use DolphinView::categorizedSorting().
 202      */
 203     bool supportsCategorizedSorting() const;
 204
 205     /**
 206      * Selects all items.
 207      * @see DolphinView::selectedItems()
 208      */
 209     void selectAll();
 210
 211     /**
 212      * Inverts the current selection: selected items get unselected,
 213      * unselected items get selected.
 214      * @see DolphinView::selectedItems()
 215      */
 216     void invertSelection();
 217
 218     /** Returns true, if at least one item is selected. */
 219     bool hasSelection() const;
 220
 221     void clearSelection();
 222
 223     /**
 224      * Returns the selected items. The list is empty if no item has been
 225      * selected.
 226      * @see DolphinView::selectedUrls()
 227      */
 228     KFileItemList selectedItems() const;
 229
 230     /**
 231      * Returns a list of URLs for all selected items. An empty list
 232      * is returned, if no item is selected.
 233      * @see DolphinView::selectedItems()
 234      */
 235     KUrl::List selectedUrls() const;
 236
 237     /**
 238      * Returns the file item for the given model index \a index.
 239      */
 240     KFileItem fileItem(const QModelIndex& index) const;
 241
 242     /**
 243      * Sets the upper left position of the view content
 244      * to (x,y). The content of the view might be larger than the visible area
 245      * and hence a scrolling must be done.
 246      */
 247     void setContentsPosition(int x, int y);
 248
 249     /** Returns the upper left position of the view content. */
 250     QPoint contentsPosition() const;
 251
 252     /** Increases the size of the current set view mode. */
 253     void zoomIn();
 254
 255     /** Decreases the size of the current set view mode. */
 256     void zoomOut();
 257
 258     /**
 259      * Returns true, if zooming in is possible. If false is returned,
 260      * the minimal zoom size is possible.
 261      */
 262     bool isZoomInPossible() const;
 263
 264     /**
 265      * Returns true, if zooming out is possible. If false is returned,
 266      * the maximum zoom size is possible.
 267      */
 268     bool isZoomOutPossible() const;
 269
 270     /** Sets the sort order of the items inside a directory (see DolphinView::Sorting). */
 271     void setSorting(Sorting sorting);
 272
 273     /** Returns the sort order of the items inside a directory (see DolphinView::Sorting). */
 274     Sorting sorting() const;
 275
 276     /** Sets the sort order (Qt::Ascending or Qt::Descending) for the items. */
 277     void setSortOrder(Qt::SortOrder order);
 278
 279     /** Returns the current used sort order (Qt::Ascending or Qt::Descending). */
 280     Qt::SortOrder sortOrder() const;
 281
 282     /** Sets the additional information which should be shown for the items. */
 283     void setAdditionalInfo(KFileItemDelegate::InformationList info);
 284
 285     /** Returns the additional information which should be shown for the items. */
 286     KFileItemDelegate::InformationList additionalInfo() const;
 287
 288     /** Reloads the current directory. */
 289     void reload();
 290
 291     /**
 292      * Refreshes the view to get synchronized with the (updated) Dolphin settings.
 293      * This method only needs to get invoked if the view settings for the Icons View,
 294      * Details View or Columns View have been changed.
 295      */
 296     void refresh();
 297
 298     /**
 299      * Changes the directory of the view to \a url. If \a rootUrl is empty, the view
 300      * properties from \a url are used for adjusting the view mode and the other properties.
 301      * If \a rootUrl is not empty, the view properties from the root URL are considered
 302      * instead. Specifying a root URL is only required if a view having a different root URL
 303      * (e. g. the column view) should be restored. Usually using DolphinView::setUrl()
 304      * is enough for changing the current URL.
 305      */
 306     void updateView(const KUrl& url, const KUrl& rootUrl);
 307
 308     /**
 309      * Filters the currently shown items by \a nameFilter. All items
 310      * which contain the given filter string will be shown.
 311      */
 312     void setNameFilter(const QString& nameFilter);
 313
 314     /**
 315      * Calculates the number of currently shown files into
 316      * \a fileCount and the number of folders into \a folderCount.
 317      * It is recommend using this method instead of asking the
 318      * directory lister or the model directly, as it takes
 319      * filtering and hierarchical previews into account.
 320      */
 321     void calculateItemCount(int& fileCount, int& folderCount);
 322
 323     /**
 324      * Returns the "switch to icons mode" action.
 325      * This code is here to share it between the mainwindow and the part
 326      */
 327     static KToggleAction* iconsModeAction(KActionCollection* collection);
 328
 329     /**
 330      * Returns the "switch to details mode" action.
 331      * This code is here to share it between the mainwindow and the part
 332      */
 333     static KToggleAction* detailsModeAction(KActionCollection* collection);
 334
 335     /**
 336      * Returns the "switch to columns mode" action.
 337      * This code is here to share it between the mainwindow and the part
 338      */
 339     static KToggleAction* columnsModeAction(KActionCollection* collection);
 340
 341     /**
 342      * Returns the action name corresponding to the current view mode
 343      */
 344     QString currentViewModeActionName() const;
 345
 346 public slots:
 347     /**
 348      * Changes the directory to \a url. If the current directory is equal to
 349      * \a url, nothing will be done (use DolphinView::reload() instead).
 350      */
 351     void setUrl(const KUrl& url);
 352
 353     /**
 354      * Request of a selection change. The view will do its best to accommodate
 355      * the request, but it is not guaranteed that all items in \a selection
 356      * will actually get selected. The view will e.g. not select items which
 357      * are not in the currently displayed folder.
 358      */
 359     void changeSelection(const KFileItemList& selection);
 360
 361
 362 signals:
 363     /**
 364      * Is emitted if the view has been activated by e. g. a mouse click.
 365      */
 366     void activated();
 367
 368     /** Is emitted if URL of the view has been changed to \a url. */
 369     void urlChanged(const KUrl& url);
 370
 371     /**
 372      * Is emitted when clicking on an item
 373      */
 374     void itemTriggered(const KFileItem& item);
 375
 376     /**
 377      * Is emitted if the view mode (IconsView, DetailsView,
 378      * PreviewsView) has been changed.
 379      */
 380     void modeChanged();
 381
 382     /** Is emitted if the 'show preview' property has been changed. */
 383     void showPreviewChanged();
 384
 385     /** Is emitted if the 'show hidden files' property has been changed. */
 386     void showHiddenFilesChanged();
 387
 388     /** Is emitted if the 'categorized sorting' property has been changed. */
 389     void categorizedSortingChanged();
 390
 391     /** Is emitted if the sorting by name, size or date has been changed. */
 392     void sortingChanged(DolphinView::Sorting sorting);
 393
 394     /** Is emitted if the sort order (ascending or descending) has been changed. */
 395     void sortOrderChanged(Qt::SortOrder order);
 396
 397     /** Is emitted if the additional information for an item has been changed. */
 398     void additionalInfoChanged(const KFileItemDelegate::InformationList& info);
 399
 400     /**
 401      * Is emitted if information of an item is requested to be shown e. g. in the sidebar.
 402      * If item is null, no item information request is pending.
 403      */
 404     void requestItemInfo(const KFileItem& item);
 405
 406     /** Is emitted if the contents has been moved to \a x, \a y. */
 407     void contentsMoved(int x, int y);
 408
 409     /**
 410      * Is emitted whenever the selection has been changed.
 411      */
 412     void selectionChanged(const KFileItemList& selection);
 413
 414     /**
 415      * Is emitted if a context menu is requested for the item \a item,
 416      * which is part of \a url. If the item is 0, the context menu
 417      * for the URL should be shown.
 418      */
 419     void requestContextMenu(const KFileItem& item, const KUrl& url);
 420
 421     /**
 422      * Is emitted if the URLs \a are dropped to the destination URL
 423      * \a destination. No operation is done within the DolphinView, the
 424      * receiver of the signal has to take care about the corresponding
 425      * operation.
 426      */
 427     void urlsDropped(const KUrl::List& urls, const KUrl& destination);
 428
 429     /**
 430      * Is emitted if an information message with the content \a msg
 431      * should be shown.
 432      */
 433     void infoMessage(const QString& msg);
 434
 435     /**
 436      * Is emitted if an error message with the content \a msg
 437      * should be shown.
 438      */
 439     void errorMessage(const QString& msg);
 440
 441     /**
 442      * Is emitted after DolphinView::setUrl() has been invoked and
 443      * the path \a url is currently loaded. If this signal is emitted,
 444      * it is assured that the view contains already the correct root
 445      * URL and property settings.
 446      */
 447     void startedPathLoading(const KUrl& url);
 448
 449 protected:
 450     /** @see QWidget::mouseReleaseEvent */
 451     virtual void mouseReleaseEvent(QMouseEvent* event);
 452
 453 private slots:
 454     /**
 455      * Marks the view as active (DolphinView:isActive() will return true)
 456      * and emits the 'activated' signal if it is not already active.
 457      */
 458     void activate();
 459
 460     /**
 461      * If the item \a item is a directory, then this
 462      * directory will be loaded. If the  item is a file, the corresponding
 463      * application will get started.
 464      */
 465     void triggerItem(const KFileItem& index);
 466
 467     /**
 468      * Generates a preview image for each file item in \a items.
 469      * The current preview settings (maximum size, 'Show Preview' menu)
 470      * are respected.
 471      */
 472     void generatePreviews(const KFileItemList& items);
 473
 474     /**
 475      * Replaces the icon of the item \a item by the preview pixmap
 476      * \a pixmap.
 477      */
 478     void showPreview(const KFileItem& item, const QPixmap& pixmap);
 479
 480     void emitSelectionChangedSignal();
 481
 482     /**
 483      * Opens the context menu on position \a pos. The position
 484      * is used to check whether the context menu is related to an
 485      * item or to the viewport.
 486      */
 487     void openContextMenu(const QPoint& pos);
 488
 489     /**
 490      * Drops the URLs \a urls to the destination path \a destPath. If
 491      * the URLs are dropped above an item inside the destination path,
 492      * the item is indicated by \a destItem. \a source
 493      * indicates the widget where the dragging has been started from.
 494      */
 495     void dropUrls(const KUrl::List& urls,
 496                   const KUrl& destPath,
 497                   const KFileItem& destItem,
 498                   QWidget* source);
 499
 500     /**
 501      * Drops the URLs \a urls at the
 502      * destination \a destination.
 503      */
 504     void dropUrls(const KUrl::List& urls,
 505                   const KUrl& destination);
 506     /**
 507      * Updates the view properties of the current URL to the
 508      * sorting given by \a sorting.
 509      */
 510     void updateSorting(DolphinView::Sorting sorting);
 511
 512     /**
 513      * Updates the view properties of the current URL to the
 514      * sort order given by \a order.
 515      */
 516     void updateSortOrder(Qt::SortOrder order);
 517
 518     /**
 519      * Updates the view properties of the current URL to the
 520      * additional informations given by \a info.
 521      */
 522     void updateAdditionalInfo(const KFileItemDelegate::InformationList& info);
 523
 524     /**
 525      * Emits the signal contentsMoved with the current coordinates
 526      * of the viewport as parameters.
 527      */
 528     void emitContentsMoved();
 529
 530     /** Applies an item effect to all cut items of the clipboard. */
 531     void updateCutItems();
 532
 533     /**
 534      * Updates the status bar to show hover information for the
 535      * item \a item. If currently other items are selected,
 536      * no hover information is shown.
 537      * @see DolphinView::clearHoverInformation()
 538      */
 539     void showHoverInformation(const KFileItem& item);
 540
 541     /**
 542      * Clears the hover information shown in the status bar.
 543      * @see DolphinView::showHoverInformation().
 544      */
 545     void clearHoverInformation();
 546
 547 private:
 548     void loadDirectory(const KUrl& url, bool reload = false);
 549
 550     /**
 551      * Returns the URL where the view properties should be stored. Usually
 552      * DolphinView::url() is returned, but in the case of a Column View the
 553      * view properties are always stored in the directory represented by the
 554      * first column. It is recommendend whenever using the ViewProperties class
 555      * to use DolphinView::viewPropertiesUrl() as URL.
 556      */
 557     KUrl viewPropertiesUrl() const;
 558
 559     /**
 560      * Applies the view properties which are defined by the current URL
 561      * m_url to the DolphinView properties.
 562      */
 563     void applyViewProperties(const KUrl& url);
 564
 565     /**
 566      * Creates a new view representing the given view mode (DolphinView::mode()).
 567      * The current view will get deleted.
 568      */
 569     void createView();
 570
 571     /**
 572      * Returns a pointer to the currently used item view, which is either
 573      * a ListView or a TreeView.
 574      */
 575     QAbstractItemView* itemView() const;
 576
 577     /**
 578      * Returns true, if the item \a item has been cut into
 579      * the clipboard.
 580      */
 581     bool isCutItem(const KFileItem& item) const;
 582
 583     /** Applies an item effect to all cut items. */
 584     void applyCutItemEffect();
 585
 586     /**
 587      * Returns true, if the ColumnView is activated. As the column view
 588      * requires some special handling for iterating through directories,
 589      * this method has been introduced for convenience.
 590      */
 591     bool isColumnViewActive() const
 592     {
 593         return m_columnView != 0;
 594     }
 595
 596 private:
 597     /**
 598      * Remembers the original pixmap for an item before
 599      * the cut effect is applied.
 600      */
 601     struct CutItem
 602     {
 603         KUrl url;
 604         QPixmap pixmap;
 605     };
 606
 607     bool m_active;
 608     bool m_loadingDirectory;
 609     bool m_storedCategorizedSorting;
 610     Mode m_mode;
 611
 612     DolphinMainWindow* m_mainWindow;
 613     QVBoxLayout* m_topLayout;
 614
 615     DolphinController* m_controller;
 616     DolphinIconsView* m_iconsView;
 617     DolphinDetailsView* m_detailsView;
 618     DolphinColumnView* m_columnView;
 619     KFileItemDelegate* m_fileItemDelegate;
 620
 621     DolphinModel* m_dolphinModel;
 622     KDirLister* m_dirLister;
 623     DolphinSortFilterProxyModel* m_proxyModel;
 624
 625     QList<CutItem> m_cutItemsCache;
 626
 627     KUrl m_rootUrl;
 628 };
 629
 630 /// Allow using DolphinView::Mode in QVariant
 631 Q_DECLARE_METATYPE(DolphinView::Mode)
 632
 633 #endif // DOLPHINVIEW_H