src/dolphinview.h

   1 /***************************************************************************
   2  *   Copyright (C) 2006-2009 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/fileundomanager.h>
  33 #include <kio/job.h>
  34
  35 #include <QBoxLayout>
  36 #include <QKeyEvent>
  37 #include <QLinkedList>
  38 #include <QListView>
  39 #include <QSet>
  40 #include <QWidget>
  41
  42 typedef KIO::FileUndoManager::CommandType CommandType;
  43
  44 class DolphinController;
  45 class DolphinColumnViewContainer;
  46 class DolphinDetailsView;
  47 class DolphinIconsView;
  48 class DolphinMainWindow;
  49 class DolphinModel;
  50 class DolphinSortFilterProxyModel;
  51 class KFilePreviewGenerator;
  52 class KAction;
  53 class KActionCollection;
  54 class KDirLister;
  55 class KUrl;
  56 class ViewProperties;
  57 class DolphinDetailsViewExpander;
  58
  59 /**
  60  * @short Represents a view for the directory content.
  61  *
  62  * View modes for icons, details and columns are supported. It's
  63  * possible to adjust:
  64  * - sort order
  65  * - sort type
  66  * - show hidden files
  67  * - show previews
  68  *
  69  * @see DolphinIconsView
  70  * @see DolphinDetailsView
  71  * @see DolphinColumnView
  72  */
  73 class LIBDOLPHINPRIVATE_EXPORT DolphinView : public QWidget
  74 {
  75     Q_OBJECT
  76
  77 public:
  78     /**
  79      * Defines the view mode for a directory. The view mode
  80      * can be defined when constructing a DolphinView. The
  81      * view mode is automatically updated if the directory itself
  82      * defines a view mode (see class ViewProperties for details).
  83      */
  84     enum Mode
  85     {
  86         /**
  87          * The directory items are shown as icons including an
  88          * icon name.
  89          */
  90         IconsView = 0,
  91
  92         /**
  93          * The icon, the name and at least the size of the directory
  94          * items are shown in a table. It is possible to add columns
  95          * for date, group and permissions.
  96          */
  97         DetailsView = 1,
  98
  99         /**
 100          * Each folder is shown in a separate column.
 101          */
 102         ColumnView = 2,
 103         MaxModeEnum = ColumnView
 104     };
 105
 106     /** Defines the sort order for the items of a directory. */
 107     enum Sorting
 108     {
 109         SortByName = 0,
 110         SortBySize,
 111         SortByDate,
 112         SortByPermissions,
 113         SortByOwner,
 114         SortByGroup,
 115         SortByType,
 116         MaxSortEnum = SortByType
 117     };
 118
 119     /**
 120      * @param parent           Parent widget of the view.
 121      * @param url              Specifies the content which should be shown.
 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                 DolphinSortFilterProxyModel* proxyModel);
 129
 130     virtual ~DolphinView();
 131
 132     /**
 133      * Returns the current active URL, where all actions are applied.
 134      * The URL navigator is synchronized with this URL.
 135      */
 136     const KUrl& url() const;
 137
 138     /**
 139      * Returns the root URL of the view, which is defined as the first
 140      * visible path of DolphinView::url(). Usually the root URL is
 141      * equal to DolphinView::url(), but in the case of the column view
 142      * when 2 columns are shown, the root URL might be:
 143      * /home/peter/Documents
 144      * and DolphinView::url() might return
 145      * /home/peter/Documents/Music/
 146      */
 147     KUrl rootUrl() const;
 148
 149     /**
 150      * If \a active is true, the view will marked as active. The active
 151      * view is defined as view where all actions are applied to.
 152      */
 153     void setActive(bool active);
 154     bool isActive() const;
 155
 156     /**
 157      * Changes the view mode for the current directory to \a mode.
 158      * If the view properties should be remembered for each directory
 159      * (GeneralSettings::globalViewProps() returns false), then the
 160      * changed view mode will be stored automatically.
 161      */
 162     void setMode(Mode mode);
 163     Mode mode() const;
 164
 165     /** See setShowPreview */
 166     bool showPreview() const;
 167
 168     /** See setShowHiddenFiles */
 169     bool showHiddenFiles() const;
 170
 171     /** See setCategorizedSorting */
 172     bool categorizedSorting() const;
 173
 174     /**
 175      * Returns true, if the categorized sorting is supported by the current
 176      * used mode (see DolphinView::setMode()). Currently only DolphinView::IconsView
 177      * supports categorizations. To check whether the categorized
 178      * sorting is set, use DolphinView::categorizedSorting().
 179      */
 180     bool supportsCategorizedSorting() const;
 181
 182     /**
 183      * Returns the selected items. The list is empty if no item has been
 184      * selected.
 185      * @see DolphinView::selectedUrls()
 186      */
 187     KFileItemList selectedItems() const;
 188
 189     /**
 190      * Returns a list of URLs for all selected items. An empty list
 191      * is returned, if no item is selected.
 192      * @see DolphinView::selectedItems()
 193      */
 194     KUrl::List selectedUrls() const;
 195
 196     /**
 197      * Returns the number of selected items (this is faster than
 198      * invoking selectedItems().count()).
 199      */
 200     int selectedItemsCount() const;
 201
 202     QItemSelectionModel* selectionModel() const;
 203
 204     /**
 205      * Sets the upper left position of the view content
 206      * to (x,y). The content of the view might be larger than the visible area
 207      * and hence a scrolling must be done.
 208      */
 209     void setContentsPosition(int x, int y);
 210
 211     /**
 212      * Sets the upper left position of the view content
 213      * to (x,y) after the directory loading is finished.
 214      * This is useful when going back or forward in history.
 215      */
 216     void setRestoredContentsPosition(const QPoint& pos);
 217
 218     /** Returns the upper left position of the view content. */
 219     QPoint contentsPosition() const;
 220
 221     /**
 222      * Sets the zoom level to \a level. It is assured that the used
 223      * level is adjusted to be inside the range ZoomLevelInfo::minimumLevel() and
 224      * ZoomLevelInfo::maximumLevel().
 225      */
 226     void setZoomLevel(int level);
 227     int zoomLevel() const;
 228
 229     /**
 230      * Returns true, if zooming in is possible. If false is returned,
 231      * the maximum zooming level has been reached.
 232      */
 233     bool isZoomInPossible() const;
 234
 235     /**
 236      * Returns true, if zooming out is possible. If false is returned,
 237      * the minimum zooming level has been reached.
 238      */
 239     bool isZoomOutPossible() const;
 240
 241     /** Sets the sort order of the items inside a directory (see DolphinView::Sorting). */
 242     void setSorting(Sorting sorting);
 243
 244     /** Returns the sort order of the items inside a directory (see DolphinView::Sorting). */
 245     Sorting sorting() const;
 246
 247     /** Sets the sort order (Qt::Ascending or Qt::Descending) for the items. */
 248     void setSortOrder(Qt::SortOrder order);
 249
 250     /** Returns the current used sort order (Qt::Ascending or Qt::Descending). */
 251     Qt::SortOrder sortOrder() const;
 252
 253     /** Sets a separate sorting with folders first (true) or a mixed sorting of files and folders (false). */
 254     void setSortFoldersFirst(bool foldersFirst);
 255
 256     /** Returns if files and folders are sorted separately or not. */
 257     bool sortFoldersFirst() const;
 258
 259     /** Sets the additional information which should be shown for the items. */
 260     void setAdditionalInfo(KFileItemDelegate::InformationList info);
 261
 262     /** Returns the additional information which should be shown for the items. */
 263     KFileItemDelegate::InformationList additionalInfo() const;
 264
 265     /** Reloads the current directory. */
 266     void reload();
 267
 268     /**
 269      * Refreshes the view to get synchronized with the (updated) Dolphin settings.
 270      * This method only needs to get invoked if the view settings for the Icons View,
 271      * Details View or Columns View have been changed.
 272      */
 273     void refresh();
 274
 275     /**
 276      * Changes the directory of the view to \a url. If \a rootUrl is empty, the view
 277      * properties from \a url are used for adjusting the view mode and the other properties.
 278      * If \a rootUrl is not empty, the view properties from the root URL are considered
 279      * instead. Specifying a root URL is only required if a view having a different root URL
 280      * (e. g. the column view) should be restored. Usually using DolphinView::setUrl()
 281      * is enough for changing the current URL.
 282      */
 283     void updateView(const KUrl& url, const KUrl& rootUrl);
 284
 285     /**
 286      * Filters the currently shown items by \a nameFilter. All items
 287      * which contain the given filter string will be shown.
 288      */
 289     void setNameFilter(const QString& nameFilter);
 290
 291     /**
 292      * Calculates the number of currently shown files into
 293      * \a fileCount and the number of folders into \a folderCount.
 294      * The size of all files is written into \a totalFileSize.
 295      * It is recommend using this method instead of asking the
 296      * directory lister or the model directly, as it takes
 297      * filtering and hierarchical previews into account.
 298      */
 299     void calculateItemCount(int& fileCount, int& folderCount, KIO::filesize_t& totalFileSize) const;
 300
 301     /**
 302      * Returns a textual representation of the state of the current
 303      * folder or selected items, suitable for use in the status bar.
 304      */
 305     QString statusBarText() const;
 306
 307     /**
 308      * Returns the version control actions that are provided for the items \p items.
 309      * Usually the actions are presented in the context menu.
 310      */
 311     QList<QAction*> versionControlActions(const KFileItemList& items) const;
 312
 313     /**
 314      * Updates the state of the 'Additional Information' actions in \a collection.
 315      */
 316     void updateAdditionalInfoActions(KActionCollection* collection);
 317
 318     /**
 319      * Returns the state of the paste action:
 320      * first is whether the action should be enabled
 321      * second is the text for the action
 322      */
 323     QPair<bool, QString> pasteInfo() const;
 324
 325     /**
 326      * If \a tabsForFiles is true, the signal tabRequested() will also
 327      * emitted also for files. Per default tabs for files is disabled
 328      * and hence the signal tabRequested() will only be emitted for
 329      * directories.
 330      */
 331     void setTabsForFilesEnabled(bool tabsForFiles);
 332     bool isTabsForFilesEnabled() const;
 333
 334     /**
 335      * Marks the item \a url as active item as soon as it has
 336      * been loaded by the directory lister. This is useful mark
 337      * the previously visited directory as active when going
 338      * back in history (the URL is known, but the item is not
 339      * loaded yet).
 340      */
 341     void activateItem(const KUrl& url);
 342
 343     /**
 344      * Returns true if the current view allows folders to be expanded,
 345      * i.e. presents a hierarchical view to the user.
 346      */
 347     bool itemsExpandable() const;
 348
 349     /**
 350      * Restores the view state (current item, contents position, details view expansion state)
 351      */
 352     void restoreState(QDataStream &stream);
 353
 354     /**
 355      * Saves the view state (current item, contents position, details view expansion state)
 356      */
 357     void saveState(QDataStream &stream);
 358
 359 public slots:
 360     /**
 361      * Changes the directory to \a url. If the current directory is equal to
 362      * \a url, nothing will be done (use DolphinView::reload() instead).
 363      */
 364     void setUrl(const KUrl& url);
 365
 366     /**
 367      * Selects all items.
 368      * @see DolphinView::selectedItems()
 369      */
 370     void selectAll();
 371
 372     /**
 373      * Inverts the current selection: selected items get unselected,
 374      * unselected items get selected.
 375      * @see DolphinView::selectedItems()
 376      */
 377     void invertSelection();
 378
 379     /** Returns true, if at least one item is selected. */
 380     bool hasSelection() const;
 381
 382     void clearSelection();
 383
 384     /**
 385      * Request of a selection change. The view will do its best to accommodate
 386      * the request, but it is not guaranteed that all items in \a selection
 387      * will actually get selected. The view will e.g. not select items which
 388      * are not in the currently displayed folder.
 389      */
 390     void changeSelection(const KFileItemList& selection);
 391
 392     /**
 393      * Triggers the renaming of the currently selected items, where
 394      * the user must input a new name for the items.
 395      */
 396     void renameSelectedItems();
 397
 398     /**
 399      * Moves all selected items to the trash.
 400      */
 401     void trashSelectedItems();
 402
 403     /**
 404      * Deletes all selected items.
 405      */
 406     void deleteSelectedItems();
 407
 408     /**
 409      * Copies all selected items to the clipboard and marks
 410      * the items as cut.
 411      */
 412     void cutSelectedItems();
 413
 414     /** Copies all selected items to the clipboard. */
 415     void copySelectedItems();
 416
 417     /** Pastes the clipboard data to this view. */
 418     void paste();
 419
 420     /**
 421      * Pastes the clipboard data into the currently selected
 422      * folder. If the current selection is not exactly one folder, no
 423      * paste operation is done.
 424      */
 425     void pasteIntoFolder();
 426
 427     /**
 428      * Turns on the file preview for the all files of the current directory,
 429      * if \a show is true.
 430      * If the view properties should be remembered for each directory
 431      * (GeneralSettings::globalViewProps() returns false), then the
 432      * preview setting will be stored automatically.
 433      */
 434     void setShowPreview(bool show);
 435
 436     /**
 437      * Shows all hidden files of the current directory,
 438      * if \a show is true.
 439      * If the view properties should be remembered for each directory
 440      * (GeneralSettings::globalViewProps() returns false), then the
 441      * show hidden file setting will be stored automatically.
 442      */
 443     void setShowHiddenFiles(bool show);
 444
 445     /**
 446      * Summarizes all sorted items by their category \a categorized
 447      * is true.
 448      * If the view properties should be remembered for each directory
 449      * (GeneralSettings::globalViewProps() returns false), then the
 450      * categorized sorting setting will be stored automatically.
 451      */
 452     void setCategorizedSorting(bool categorized);
 453
 454     /** Switches between an ascending and descending sorting order. */
 455     void toggleSortOrder();
 456
 457     /** Switches between a separate sorting (with folders first) and a mixed sorting of files and folders. */
 458     void toggleSortFoldersFirst();
 459
 460     /**
 461      * Switches on or off the displaying of additional information
 462      * as specified by \a action.
 463      */
 464     void toggleAdditionalInfo(QAction* action);
 465
 466 signals:
 467     /**
 468      * Is emitted if the view has been activated by e. g. a mouse click.
 469      */
 470     void activated();
 471
 472     /** Is emitted if URL of the view has been changed to \a url. */
 473     void urlChanged(const KUrl& url);
 474
 475     /**
 476      * Is emitted if the view requests a changing of the current
 477      * URL to \a url (see DolphinController::triggerUrlChangeRequest()).
 478      */
 479     void requestUrlChange(const KUrl& url);
 480
 481     /**
 482      * Is emitted when clicking on an item with the left mouse button.
 483      */
 484     void itemTriggered(const KFileItem& item);
 485
 486     /**
 487      * Is emitted if a new tab should be opened for the URL \a url.
 488      */
 489     void tabRequested(const KUrl& url);
 490
 491     /**
 492      * Is emitted if the view mode (IconsView, DetailsView,
 493      * PreviewsView) has been changed.
 494      */
 495     void modeChanged();
 496
 497     /** Is emitted if the 'show preview' property has been changed. */
 498     void showPreviewChanged();
 499
 500     /** Is emitted if the 'show hidden files' property has been changed. */
 501     void showHiddenFilesChanged();
 502
 503     /** Is emitted if the 'categorized sorting' property has been changed. */
 504     void categorizedSortingChanged();
 505
 506     /** Is emitted if the sorting by name, size or date has been changed. */
 507     void sortingChanged(DolphinView::Sorting sorting);
 508
 509     /** Is emitted if the sort order (ascending or descending) has been changed. */
 510     void sortOrderChanged(Qt::SortOrder order);
 511
 512     /** Is emitted if the sorting of files and folders (separate with folders first or mixed) has been changed. */
 513     void sortFoldersFirstChanged(bool foldersFirst);
 514
 515     /** Is emitted if the additional information shown for this view has been changed. */
 516     void additionalInfoChanged();
 517
 518     /** Is emitted if the zoom level has been changed by zooming in or out. */
 519     void zoomLevelChanged(int level);
 520
 521     /**
 522      * Is emitted if information of an item is requested to be shown e. g. in the panel.
 523      * If item is null, no item information request is pending.
 524      */
 525     void requestItemInfo(const KFileItem& item);
 526
 527     /** Is emitted if the contents has been moved to \a x, \a y. */
 528     void contentsMoved(int x, int y);
 529
 530     /**
 531      * Is emitted whenever the selection has been changed.
 532      */
 533     void selectionChanged(const KFileItemList& selection);
 534
 535     /**
 536      * Is emitted if a context menu is requested for the item \a item,
 537      * which is part of \a url. If the item is null, the context menu
 538      * for the URL should be shown and the custom actions \a customActions
 539      * will be added.
 540      */
 541     void requestContextMenu(const KFileItem& item,
 542                             const KUrl& url,
 543                             const QList<QAction*>& customActions);
 544
 545     /**
 546      * Is emitted if an information message with the content \a msg
 547      * should be shown.
 548      */
 549     void infoMessage(const QString& msg);
 550
 551     /**
 552      * Is emitted if an error message with the content \a msg
 553      * should be shown.
 554      */
 555     void errorMessage(const QString& msg);
 556
 557     /**
 558      * Is emitted if an "operation completed" message with the content \a msg
 559      * should be shown.
 560      */
 561     void operationCompletedMessage(const QString& msg);
 562
 563     /**
 564      * Is emitted after DolphinView::setUrl() has been invoked and
 565      * the path \a url is currently loaded. If this signal is emitted,
 566      * it is assured that the view contains already the correct root
 567      * URL and property settings.
 568      */
 569     void startedPathLoading(const KUrl& url);
 570
 571     /**
 572      * Emitted when KDirLister emits redirection.
 573      * Testcase: fish://localhost
 574      */
 575     void redirection(const KUrl& oldUrl, const KUrl& newUrl);
 576
 577 protected:
 578     /** @see QWidget::mouseReleaseEvent */
 579     virtual void mouseReleaseEvent(QMouseEvent* event);
 580     virtual bool eventFilter(QObject* watched, QEvent* event);
 581
 582 private slots:
 583     /**
 584      * Marks the view as active (DolphinView:isActive() will return true)
 585      * and emits the 'activated' signal if it is not already active.
 586      */
 587     void activate();
 588
 589     /**
 590      * If the item \a item is a directory, then this
 591      * directory will be loaded. If the  item is a file, the corresponding
 592      * application will get started.
 593      */
 594     void triggerItem(const KFileItem& index);
 595
 596     /**
 597      * Emits the signal \a selectionChanged() with a small delay. This is
 598      * because getting all file items for the signal can be an expensive
 599      * operation. Fast selection changes are collected in this case and
 600      * the signal is emitted only after no selection change has been done
 601      * within a small delay.
 602      */
 603     void emitDelayedSelectionChangedSignal();
 604
 605     /**
 606      * Is called by emitDelayedSelectionChangedSignal() and emits the
 607      * signal \a selectionChanged() with all selected file items as parameter.
 608      */
 609     void emitSelectionChangedSignal();
 610
 611     /**
 612      * Opens the context menu on position \a pos. The position
 613      * is used to check whether the context menu is related to an
 614      * item or to the viewport.
 615      */
 616     void openContextMenu(const QPoint& pos, const QList<QAction*>& customActions);
 617
 618     /**
 619      * Drops dragged URLs to the destination path \a destPath. If
 620      * the URLs are dropped above an item inside the destination path,
 621      * the item is indicated by \a destItem.
 622      */
 623     void dropUrls(const KFileItem& destItem,
 624                   const KUrl& destPath,
 625                   QDropEvent* event);
 626
 627     /**
 628      * Updates the view properties of the current URL to the
 629      * sorting given by \a sorting.
 630      */
 631     void updateSorting(DolphinView::Sorting sorting);
 632
 633     /**
 634      * Updates the view properties of the current URL to the
 635      * sort order given by \a order.
 636      */
 637     void updateSortOrder(Qt::SortOrder order);
 638
 639     /**
 640      * Updates the view properties of the current URL to the
 641      * sorting of files and folders (separate with folders first or mixed) given by \a foldersFirst.
 642      */
 643     void updateSortFoldersFirst(bool foldersFirst);
 644
 645     /**
 646      * Updates the view properties of the current URL to the
 647      * additional information given by \a info.
 648      */
 649     void updateAdditionalInfo(const KFileItemDelegate::InformationList& info);
 650
 651     /**
 652      * Emits the signal contentsMoved with the current coordinates
 653      * of the viewport as parameters.
 654      */
 655     void emitContentsMoved();
 656
 657     /**
 658      * Updates the status bar to show hover information for the
 659      * item \a item. If currently other items are selected,
 660      * no hover information is shown.
 661      * @see DolphinView::clearHoverInformation()
 662      */
 663     void showHoverInformation(const KFileItem& item);
 664
 665     /**
 666      * Clears the hover information shown in the status bar.
 667      * @see DolphinView::showHoverInformation().
 668      */
 669     void clearHoverInformation();
 670
 671     /**
 672      * Indicates in the status bar that the delete operation
 673      * of the job \a job has been finished.
 674      */
 675     void slotDeleteFileFinished(KJob* job);
 676
 677     /**
 678      * Is emitted if the controller requests a changing of the current
 679      * URL to \a url
 680      */
 681     void slotRequestUrlChange(const KUrl& url);
 682
 683     /**
 684      * Invoked when the directory lister has completed the loading of
 685      * items. Assures that pasted items and renamed items get seleced.
 686      */
 687     void slotDirListerCompleted();
 688
 689     /**
 690      * Invoked when the loading of the directory is finished.
 691      * Restores the active item and the scroll position if possible.
 692      */
 693     void slotLoadingCompleted();
 694
 695     /**
 696      * Is invoked when the KDirLister indicates refreshed items.
 697      */
 698     void slotRefreshItems();
 699
 700     /**
 701      * Observes the item with the URL \a url. As soon as the directory
 702      * model indicates that the item is available, the item will
 703      * get selected and it is assure that the item stays visible.
 704      *
 705      * @see selectAndScrollToCreatedItem()
 706      */
 707     void observeCreatedItem(const KUrl& url);
 708
 709     /**
 710      * Selects and scrolls to the item that got observed
 711      * by observeCreatedItem().
 712      */
 713     void selectAndScrollToCreatedItem();
 714
 715     /**
 716      * Called when a redirection happens.
 717      * Testcase: fish://localhost
 718      */
 719     void slotRedirection(const KUrl& oldUrl, const KUrl& newUrl);
 720
 721     /**
 722      * Restores the contents position, if history information about the old position is available.
 723      */
 724     void restoreContentsPosition();
 725
 726 private:
 727     void loadDirectory(const KUrl& url, bool reload = false);
 728
 729     /**
 730      * Applies the view properties which are defined by the current URL
 731      * to the DolphinView properties.
 732      */
 733     void applyViewProperties();
 734
 735     /**
 736      * Creates a new view representing the given view mode (DolphinView::mode()).
 737      * The current view will get deleted.
 738      */
 739     void createView();
 740
 741     void deleteView();
 742
 743     /**
 744      * Helper method for DolphinView::paste() and DolphinView::pasteIntoFolder().
 745      * Pastes the clipboard data into the URL \a url.
 746      */
 747     void pasteToUrl(const KUrl& url);
 748
 749     /**
 750      * Checks whether the current item view has the same zoom level
 751      * as \a oldZoomLevel. If this is not the case, the zoom level
 752      * of the controller is updated and a zoomLevelChanged() signal
 753      * is emitted.
 754      */
 755     void updateZoomLevel(int oldZoomLevel);
 756
 757     /**
 758      * Returns a list of URLs for all selected items. The list is
 759      * simplified, so that when the URLs are part of different tree
 760      * levels, only the parent is returned.
 761      */
 762     KUrl::List simplifiedSelectedUrls() const;
 763
 764     /**
 765      * Returns the MIME data for all selected items.
 766      */
 767     QMimeData* selectionMimeData() const;
 768
 769     /**
 770      * Is invoked after a paste operation or a drag & drop
 771      * operation and adds the filenames of all URLs from \a mimeData to
 772      * m_newFileNames. This allows to select all newly added
 773      * items in slotDirListerCompleted().
 774      */
 775     void addNewFileNames(const QMimeData* mimeData);
 776
 777 private:
 778     /**
 779      * Abstracts the access to the different view implementations
 780      * for icons-, details- and column-view.
 781      */
 782     class ViewAccessor
 783     {
 784     public:
 785         ViewAccessor(DolphinSortFilterProxyModel* proxyModel);
 786         ~ViewAccessor();
 787
 788         void createView(QWidget* parent, DolphinController* controller, Mode mode);
 789         void deleteView();
 790
 791         /**
 792          * Must be invoked before the URL has been changed and allows view implementations
 793          * like the column view to create a new column.
 794          */
 795         void prepareUrlChange(const KUrl& url);
 796
 797         QAbstractItemView* itemView() const;
 798         KFileItemDelegate* itemDelegate() const;
 799
 800         /**
 801          * Returns the widget that should be added to the layout as target. Usually
 802          * the item view itself is returned, but in the case of the column view
 803          * a container widget is returned.
 804          */
 805         QWidget* layoutTarget() const;
 806
 807         KUrl rootUrl() const;
 808
 809         bool supportsCategorizedSorting() const;
 810         bool itemsExpandable() const;
 811         QSet<KUrl> expandedUrls() const;
 812         const DolphinDetailsViewExpander* setExpandedUrls(const QSet<KUrl>& urlsToExpand);
 813
 814         /**
 815          * Returns true, if a reloading of the items is required
 816          * when the additional information properties have been changed
 817          * by the user.
 818          */
 819         bool reloadOnAdditionalInfoChange() const;
 820
 821         DolphinModel* dirModel() const;
 822         DolphinSortFilterProxyModel* proxyModel() const;
 823         KDirLister* dirLister() const;
 824
 825     private:
 826         DolphinIconsView* m_iconsView;
 827         DolphinDetailsView* m_detailsView;
 828         DolphinColumnViewContainer* m_columnsContainer;
 829         DolphinSortFilterProxyModel* m_proxyModel;
 830         QAbstractItemView* m_dragSource;
 831         QPointer<DolphinDetailsViewExpander> m_detailsViewExpander;
 832     };
 833
 834     bool m_active : 1;
 835     bool m_showPreview : 1;
 836     bool m_loadingDirectory : 1;
 837     bool m_storedCategorizedSorting : 1;
 838     bool m_tabsForFiles : 1;
 839     bool m_isContextMenuOpen : 1;   // TODO: workaround for Qt-issue 207192
 840     bool m_ignoreViewProperties : 1;
 841     bool m_assureVisibleCurrentIndex : 1;
 842     bool m_expanderActive : 1;
 843
 844     Mode m_mode;
 845
 846     DolphinMainWindow* m_mainWindow;
 847     QVBoxLayout* m_topLayout;
 848
 849     DolphinController* m_controller;
 850     ViewAccessor m_viewAccessor;
 851
 852     QItemSelectionModel* m_selectionModel; // allow to switch views without losing the selection
 853     QTimer* m_selectionChangedTimer;
 854
 855     KUrl m_rootUrl;
 856     KUrl m_activeItemUrl;
 857     QPoint m_restoredContentsPosition;
 858     KUrl m_createdItemUrl; // URL for a new item that got created by the "Create New..." menu
 859     KFileItemList m_selectedItems; // this is used for making the View to remember selections after F5
 860
 861     /**
 862      * Remembers the filenames that have been added by a paste operation
 863      * or a drag & drop operation. Allows to select the items in
 864      * slotDirListerCompleted().
 865      */
 866     QSet<QString> m_newFileNames;
 867 };
 868
 869 /// Allow using DolphinView::Mode in QVariant
 870 Q_DECLARE_METATYPE(DolphinView::Mode)
 871
 872 #endif // DOLPHINVIEW_H