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 <konq_fileundomanager.h>
  33 #include <kio/job.h>
  34
  35 #include <QBoxLayout>
  36 #include <QKeyEvent>
  37 #include <QLinkedList>
  38 #include <QListView>
  39 #include <QWidget>
  40
  41 class KAction;
  42 class KToggleAction;
  43 class DolphinController;
  44 class KDirLister;
  45 class KFileItemDelegate;
  46 class KUrl;
  47 class DolphinModel;
  48 class DolphinColumnView;
  49 class DolphinDetailsView;
  50 class DolphinIconsView;
  51 class DolphinMainWindow;
  52 class DolphinSortFilterProxyModel;
  53 class QModelIndex;
  54 class ViewProperties;
  55 namespace KIO
  56 {
  57     class PreviewJob;
  58 }
  59
  60 /**
  61  * @short Represents a view for the directory content.
  62  *
  63  * View modes for icons, details and columns are supported. It's
  64  * possible to adjust:
  65  * - sort order
  66  * - sort type
  67  * - show hidden files
  68  * - show previews
  69  *
  70  * @see DolphinIconsView
  71  * @see DolphinDetailsView
  72  * @see DolphinColumnView
  73  */
  74 class LIBDOLPHINPRIVATE_EXPORT DolphinView : public QWidget
  75 {
  76     Q_OBJECT
  77
  78 public:
  79     /**
  80         * Defines the view mode for a directory. The view mode
  81         * can be defined when constructing a DolphinView. The
  82         * view mode is automatically updated if the directory itself
  83         * defines a view mode (see class ViewProperties for details).
  84         */
  85     enum Mode
  86     {
  87         /**
  88          * The directory items are shown as icons including an
  89          * icon name. */
  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         SortByRating,
 117         SortByTags,
 118         MaxSortEnum = SortByTags
 119     };
 120
 121     /**
 122      * @param parent          Parent widget of the view.
 123      * @param url             Specifies the content which should be shown.
 124      * @param dirLister       Used directory lister. The lister is not owned
 125      *                        by the view and won't get deleted.
 126      * @param dolphinModel    Used directory model. The model is not owned
 127      *                        by the view and won't get deleted.
 128      * @param proxyModel      Used proxy model which specifies the sorting. The
 129      *                        model is not owned by the view and won't get
 130      *                        deleted.
 131      */
 132     DolphinView(QWidget* parent,
 133                 const KUrl& url,
 134                 KDirLister* dirLister,
 135                 DolphinModel* dolphinModel,
 136                 DolphinSortFilterProxyModel* proxyModel);
 137
 138     virtual ~DolphinView();
 139
 140     /**
 141      * Returns the current active URL, where all actions are applied.
 142      * The URL navigator is synchronized with this URL.
 143      */
 144     const KUrl& url() const;
 145
 146     /**
 147      * Returns the root URL of the view, which is defined as the first
 148      * visible path of DolphinView::url(). Usually the root URL is
 149      * equal to DolphinView::url(), but in the case of the column view
 150      * when 2 columns are shown, the root URL might be:
 151      * /home/peter/Documents
 152      * and DolphinView::url() might return
 153      * /home/peter/Documents/Music/
 154      */
 155     KUrl rootUrl() const;
 156
 157     /**
 158      * If \a active is true, the view will marked as active. The active
 159      * view is defined as view where all actions are applied to.
 160      */
 161     void setActive(bool active);
 162     bool isActive() const;
 163
 164     /**
 165      * Changes the view mode for the current directory to \a mode.
 166      * If the view properties should be remembered for each directory
 167      * (GeneralSettings::globalViewProps() returns false), then the
 168      * changed view mode will be be stored automatically.
 169      */
 170     void setMode(Mode mode);
 171     Mode mode() const;
 172
 173     /**
 174      * Turns on the file preview for the all files of the current directory,
 175      * if \a show is true.
 176      * If the view properties should be remembered for each directory
 177      * (GeneralSettings::globalViewProps() returns false), then the
 178      * preview setting will be be stored automatically.
 179      */
 180     void setShowPreview(bool show);
 181     bool showPreview() const;
 182
 183     /**
 184      * Shows all hidden files of the current directory,
 185      * if \a show is true.
 186      * If the view properties should be remembered for each directory
 187      * (GeneralSettings::globalViewProps() returns false), then the
 188      * show hidden file setting will be be stored automatically.
 189      */
 190     void setShowHiddenFiles(bool show);
 191     bool showHiddenFiles() const;
 192
 193     /**
 194      * Summarizes all sorted items by their category \a categorized
 195      * is true.
 196      * If the view properties should be remembered for each directory
 197      * (GeneralSettings::globalViewProps() returns false), then the
 198      * categorized sorting setting will be be stored automatically.
 199      */
 200     void setCategorizedSorting(bool categorized);
 201     bool categorizedSorting() const;
 202
 203     /**
 204      * Returns true, if the categorized sorting is supported by the current
 205      * used mode (see DolphinView::setMode()). Currently only DolphinView::IconsView
 206      * supports categorizations. To check whether the categorized
 207      * sorting is set, use DolphinView::categorizedSorting().
 208      */
 209     bool supportsCategorizedSorting() const;
 210
 211     /**
 212      * Selects all items.
 213      * @see DolphinView::selectedItems()
 214      */
 215     void selectAll();
 216
 217     /**
 218      * Inverts the current selection: selected items get unselected,
 219      * unselected items get selected.
 220      * @see DolphinView::selectedItems()
 221      */
 222     void invertSelection();
 223
 224     /** Returns true, if at least one item is selected. */
 225     bool hasSelection() const;
 226
 227     void clearSelection();
 228
 229     /**
 230      * Returns the selected items. The list is empty if no item has been
 231      * selected.
 232      * @see DolphinView::selectedUrls()
 233      */
 234     KFileItemList selectedItems() const;
 235
 236     /**
 237      * Returns a list of URLs for all selected items. An empty list
 238      * is returned, if no item is selected.
 239      * @see DolphinView::selectedItems()
 240      */
 241     KUrl::List selectedUrls() const;
 242
 243     /**
 244      * Returns the file item for the given model index \a index.
 245      */
 246     KFileItem fileItem(const QModelIndex& index) const;
 247
 248     /**
 249      * Sets the upper left position of the view content
 250      * to (x,y). The content of the view might be larger than the visible area
 251      * and hence a scrolling must be done.
 252      */
 253     void setContentsPosition(int x, int y);
 254
 255     /** Returns the upper left position of the view content. */
 256     QPoint contentsPosition() const;
 257
 258     /** Increases the size of the current set view mode. */
 259     void zoomIn();
 260
 261     /** Decreases the size of the current set view mode. */
 262     void zoomOut();
 263
 264     /**
 265      * Returns true, if zooming in is possible. If false is returned,
 266      * the minimal zoom size is possible.
 267      */
 268     bool isZoomInPossible() const;
 269
 270     /**
 271      * Returns true, if zooming out is possible. If false is returned,
 272      * the maximum zoom size is possible.
 273      */
 274     bool isZoomOutPossible() const;
 275
 276     /** Sets the sort order of the items inside a directory (see DolphinView::Sorting). */
 277     void setSorting(Sorting sorting);
 278
 279     /** Returns the sort order of the items inside a directory (see DolphinView::Sorting). */
 280     Sorting sorting() const;
 281
 282     /** Sets the sort order (Qt::Ascending or Qt::Descending) for the items. */
 283     void setSortOrder(Qt::SortOrder order);
 284
 285     /** Returns the current used sort order (Qt::Ascending or Qt::Descending). */
 286     Qt::SortOrder sortOrder() const;
 287
 288     /** Sets the additional information which should be shown for the items. */
 289     void setAdditionalInfo(KFileItemDelegate::InformationList info);
 290
 291     /** Returns the additional information which should be shown for the items. */
 292     KFileItemDelegate::InformationList additionalInfo() const;
 293
 294     /** Reloads the current directory. */
 295     void reload();
 296
 297     /**
 298      * Refreshes the view to get synchronized with the (updated) Dolphin settings.
 299      * This method only needs to get invoked if the view settings for the Icons View,
 300      * Details View or Columns View have been changed.
 301      */
 302     void refresh();
 303
 304     /**
 305      * Changes the directory of the view to \a url. If \a rootUrl is empty, the view
 306      * properties from \a url are used for adjusting the view mode and the other properties.
 307      * If \a rootUrl is not empty, the view properties from the root URL are considered
 308      * instead. Specifying a root URL is only required if a view having a different root URL
 309      * (e. g. the column view) should be restored. Usually using DolphinView::setUrl()
 310      * is enough for changing the current URL.
 311      */
 312     void updateView(const KUrl& url, const KUrl& rootUrl);
 313
 314     /**
 315      * Filters the currently shown items by \a nameFilter. All items
 316      * which contain the given filter string will be shown.
 317      */
 318     void setNameFilter(const QString& nameFilter);
 319
 320     /**
 321      * Calculates the number of currently shown files into
 322      * \a fileCount and the number of folders into \a folderCount.
 323      * It is recommend using this method instead of asking the
 324      * directory lister or the model directly, as it takes
 325      * filtering and hierarchical previews into account.
 326      */
 327     void calculateItemCount(int& fileCount, int& folderCount);
 328
 329     /**
 330      * Returns the "switch to icons mode" action.
 331      * This code is here to share it between the mainwindow and the part
 332      */
 333     static KToggleAction* iconsModeAction(KActionCollection* collection);
 334
 335     /**
 336      * Returns the "switch to details mode" action.
 337      * This code is here to share it between the mainwindow and the part
 338      */
 339     static KToggleAction* detailsModeAction(KActionCollection* collection);
 340
 341     /**
 342      * Returns the "switch to columns mode" action.
 343      * This code is here to share it between the mainwindow and the part
 344      */
 345     static KToggleAction* columnsModeAction(KActionCollection* collection);
 346
 347     /**
 348      * Creates the rename action.
 349      * This code is here to share it between the mainwindow and the part
 350      */
 351     static KAction* createRenameAction(KActionCollection* collection);
 352
 353     /**
 354      * Creates the "move to trash" action.
 355      * This code is here to share it between the mainwindow and the part
 356      */
 357     static KAction* createMoveToTrashAction(KActionCollection* collection);
 358
 359     /**
 360      * Creates the delete action.
 361      * This code is here to share it between the mainwindow and the part
 362      */
 363     static KAction* createDeleteAction(KActionCollection* collection);
 364
 365     /**
 366      * Returns the action name corresponding to the current view mode
 367      */
 368     QString currentViewModeActionName() const;
 369
 370     /**
 371      * Returns the state of the paste action:
 372      * first is whether the action should be enabled
 373      * second is the text for the action
 374      */
 375     QPair<bool, QString> pasteInfo() const;
 376
 377 public slots:
 378     /**
 379      * Changes the directory to \a url. If the current directory is equal to
 380      * \a url, nothing will be done (use DolphinView::reload() instead).
 381      */
 382     void setUrl(const KUrl& url);
 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 cutted.
 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 signals:
 421     /**
 422      * Is emitted if the view has been activated by e. g. a mouse click.
 423      */
 424     void activated();
 425
 426     /** Is emitted if URL of the view has been changed to \a url. */
 427     void urlChanged(const KUrl& url);
 428
 429     /**
 430      * Is emitted when clicking on an item
 431      */
 432     void itemTriggered(const KFileItem& item);
 433
 434     /**
 435      * Is emitted if the view mode (IconsView, DetailsView,
 436      * PreviewsView) has been changed.
 437      */
 438     void modeChanged();
 439
 440     /** Is emitted if the 'show preview' property has been changed. */
 441     void showPreviewChanged();
 442
 443     /** Is emitted if the 'show hidden files' property has been changed. */
 444     void showHiddenFilesChanged();
 445
 446     /** Is emitted if the 'categorized sorting' property has been changed. */
 447     void categorizedSortingChanged();
 448
 449     /** Is emitted if the sorting by name, size or date has been changed. */
 450     void sortingChanged(DolphinView::Sorting sorting);
 451
 452     /** Is emitted if the sort order (ascending or descending) has been changed. */
 453     void sortOrderChanged(Qt::SortOrder order);
 454
 455     /** Is emitted if the additional information for an item has been changed. */
 456     void additionalInfoChanged(const KFileItemDelegate::InformationList& info);
 457
 458     /**
 459      * Is emitted if information of an item is requested to be shown e. g. in the sidebar.
 460      * If item is null, no item information request is pending.
 461      */
 462     void requestItemInfo(const KFileItem& item);
 463
 464     /** Is emitted if the contents has been moved to \a x, \a y. */
 465     void contentsMoved(int x, int y);
 466
 467     /**
 468      * Is emitted whenever the selection has been changed.
 469      */
 470     void selectionChanged(const KFileItemList& selection);
 471
 472     /**
 473      * Is emitted if a context menu is requested for the item \a item,
 474      * which is part of \a url. If the item is 0, the context menu
 475      * for the URL should be shown.
 476      */
 477     void requestContextMenu(const KFileItem& item, const KUrl& url);
 478
 479     /**
 480      * Is emitted if an information message with the content \a msg
 481      * should be shown.
 482      */
 483     void infoMessage(const QString& msg);
 484
 485     /**
 486      * Is emitted if an error message with the content \a msg
 487      * should be shown.
 488      */
 489     void errorMessage(const QString& msg);
 490
 491     /**
 492      * Is emitted if an "operation completed" message with the content \a msg
 493      * should be shown.
 494      */
 495     void operationCompletedMessage(const QString& msg);
 496
 497     /**
 498      * Is emitted after DolphinView::setUrl() has been invoked and
 499      * the path \a url is currently loaded. If this signal is emitted,
 500      * it is assured that the view contains already the correct root
 501      * URL and property settings.
 502      */
 503     void startedPathLoading(const KUrl& url);
 504
 505     /**
 506      * Is emitted when renaming, copying, moving, linking etc.
 507      * Used for feedback in the mainwindow.
 508      */
 509     void doingOperation(KonqFileUndoManager::CommandType type);
 510
 511 protected:
 512     /** @see QWidget::mouseReleaseEvent */
 513     virtual void mouseReleaseEvent(QMouseEvent* event);
 514
 515 private slots:
 516     /**
 517      * Marks the view as active (DolphinView:isActive() will return true)
 518      * and emits the 'activated' signal if it is not already active.
 519      */
 520     void activate();
 521
 522     /**
 523      * If the item \a item is a directory, then this
 524      * directory will be loaded. If the  item is a file, the corresponding
 525      * application will get started.
 526      */
 527     void triggerItem(const KFileItem& index);
 528
 529     /**
 530      * Generates a preview image for each file item in \a items.
 531      * The current preview settings (maximum size, 'Show Preview' menu)
 532      * are respected.
 533      */
 534     void generatePreviews(const KFileItemList& items);
 535
 536     /**
 537      * Replaces the icon of the item \a item by the preview pixmap
 538      * \a pixmap.
 539      */
 540     void replaceIcon(const KFileItem& item, const QPixmap& pixmap);
 541
 542     void emitSelectionChangedSignal();
 543
 544     /**
 545      * Opens the context menu on position \a pos. The position
 546      * is used to check whether the context menu is related to an
 547      * item or to the viewport.
 548      */
 549     void openContextMenu(const QPoint& pos);
 550
 551     /**
 552      * Drops the URLs \a urls to the destination path \a destPath. If
 553      * the URLs are dropped above an item inside the destination path,
 554      * the item is indicated by \a destItem.
 555      */
 556     void dropUrls(const KUrl::List& urls,
 557                   const KUrl& destPath,
 558                   const KFileItem& destItem);
 559
 560     /**
 561      * Handles the dropping of URLs to the given destination.
 562      * @see DolphinDropController
 563      */
 564     void dropUrls(const KUrl::List& urls,
 565                   const KUrl& destination);
 566     /**
 567      * Updates the view properties of the current URL to the
 568      * sorting given by \a sorting.
 569      */
 570     void updateSorting(DolphinView::Sorting sorting);
 571
 572     /**
 573      * Updates the view properties of the current URL to the
 574      * sort order given by \a order.
 575      */
 576     void updateSortOrder(Qt::SortOrder order);
 577
 578     /**
 579      * Updates the view properties of the current URL to the
 580      * additional information given by \a info.
 581      */
 582     void updateAdditionalInfo(const KFileItemDelegate::InformationList& info);
 583
 584     /**
 585      * Emits the signal contentsMoved with the current coordinates
 586      * of the viewport as parameters.
 587      */
 588     void emitContentsMoved();
 589
 590     /** Applies an item effect to all cut items of the clipboard. */
 591     void updateCutItems();
 592
 593     /**
 594      * Updates the status bar to show hover information for the
 595      * item \a item. If currently other items are selected,
 596      * no hover information is shown.
 597      * @see DolphinView::clearHoverInformation()
 598      */
 599     void showHoverInformation(const KFileItem& item);
 600
 601     /**
 602      * Clears the hover information shown in the status bar.
 603      * @see DolphinView::showHoverInformation().
 604      */
 605     void clearHoverInformation();
 606
 607     /**
 608      * Indicates in the status bar that the delete operation
 609      * of the job \a job has been finished.
 610      */
 611     void slotDeleteFileFinished(KJob* job);
 612
 613     /**
 614      * Is invoked when the preview job has been finished and
 615      * set m_previewJob to 0.
 616      */
 617     void slotPreviewJobFinished(KJob* job);
 618
 619 private:
 620     void loadDirectory(const KUrl& url, bool reload = false);
 621
 622     /**
 623      * Returns the URL where the view properties should be stored. Usually
 624      * DolphinView::url() is returned, but in the case of a Column View the
 625      * view properties are always stored in the directory represented by the
 626      * first column. It is recommendend whenever using the ViewProperties class
 627      * to use DolphinView::viewPropertiesUrl() as URL.
 628      */
 629     KUrl viewPropertiesUrl() const;
 630
 631     /**
 632      * Applies the view properties which are defined by the current URL
 633      * m_url to the DolphinView properties.
 634      */
 635     void applyViewProperties(const KUrl& url);
 636
 637     /**
 638      * Creates a new view representing the given view mode (DolphinView::mode()).
 639      * The current view will get deleted.
 640      */
 641     void createView();
 642
 643     void deleteView();
 644
 645     /**
 646      * Returns a pointer to the currently used item view, which is either
 647      * a ListView or a TreeView.
 648      */
 649     QAbstractItemView* itemView() const;
 650
 651     /**
 652      * Returns true, if the item \a item has been cut into
 653      * the clipboard.
 654      */
 655     bool isCutItem(const KFileItem& item) const;
 656
 657     /** Applies an item effect to all cut items. */
 658     void applyCutItemEffect();
 659
 660     /**
 661      * Returns true, if the ColumnView is activated. As the column view
 662      * requires some special handling for iterating through directories,
 663      * this method has been introduced for convenience.
 664      */
 665     bool isColumnViewActive() const
 666     {
 667         return m_columnView != 0;
 668     }
 669
 670 private:
 671     /**
 672      * Remembers the original pixmap for an item before
 673      * the cut effect is applied.
 674      */
 675     struct CutItem
 676     {
 677         KUrl url;
 678         QPixmap pixmap;
 679     };
 680
 681     bool m_active;
 682     bool m_showPreview;
 683     bool m_loadingDirectory;
 684     bool m_storedCategorizedSorting;
 685     Mode m_mode;
 686
 687     DolphinMainWindow* m_mainWindow;
 688     QVBoxLayout* m_topLayout;
 689
 690     DolphinController* m_controller;
 691     DolphinIconsView* m_iconsView;
 692     DolphinDetailsView* m_detailsView;
 693     DolphinColumnView* m_columnView;
 694     KFileItemDelegate* m_fileItemDelegate;
 695     QItemSelectionModel* m_selectionModel;
 696
 697     DolphinModel* m_dolphinModel;
 698     KDirLister* m_dirLister;
 699     DolphinSortFilterProxyModel* m_proxyModel;
 700
 701     KIO::PreviewJob* m_previewJob;
 702
 703     QList<CutItem> m_cutItemsCache;
 704
 705     KUrl m_rootUrl;
 706 };
 707
 708 /// Allow using DolphinView::Mode in QVariant
 709 Q_DECLARE_METATYPE(DolphinView::Mode)
 710
 711 #endif // DOLPHINVIEW_H