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 QActionGroup;
  42 class KAction;
  43 class KToggleAction;
  44 class DolphinController;
  45 class KDirLister;
  46 class KFileItemDelegate;
  47 class KUrl;
  48 class DolphinModel;
  49 class DolphinColumnView;
  50 class DolphinDetailsView;
  51 class DolphinIconsView;
  52 class DolphinMainWindow;
  53 class DolphinSortFilterProxyModel;
  54 class QModelIndex;
  55 class ViewProperties;
  56 namespace KIO
  57 {
  58     class PreviewJob;
  59 }
  60
  61 /**
  62  * @short Represents a view for the directory content.
  63  *
  64  * View modes for icons, details and columns are supported. It's
  65  * possible to adjust:
  66  * - sort order
  67  * - sort type
  68  * - show hidden files
  69  * - show previews
  70  *
  71  * @see DolphinIconsView
  72  * @see DolphinDetailsView
  73  * @see DolphinColumnView
  74  */
  75 class LIBDOLPHINPRIVATE_EXPORT DolphinView : public QWidget
  76 {
  77     Q_OBJECT
  78
  79 public:
  80     /**
  81         * Defines the view mode for a directory. The view mode
  82         * can be defined when constructing a DolphinView. The
  83         * view mode is automatically updated if the directory itself
  84         * defines a view mode (see class ViewProperties for details).
  85         */
  86     enum Mode
  87     {
  88         /**
  89          * The directory items are shown as icons including an
  90          * icon name. */
  91         IconsView = 0,
  92
  93         /**
  94          * The icon, the name and at least the size of the directory
  95          * items are shown in a table. It is possible to add columns
  96          * for date, group and permissions.
  97          */
  98         DetailsView = 1,
  99
 100         /**
 101          * Each folder is shown in a separate column.
 102          */
 103         ColumnView = 2,
 104         MaxModeEnum = ColumnView
 105     };
 106
 107     /** Defines the sort order for the items of a directory. */
 108     enum Sorting
 109     {
 110         SortByName = 0,
 111         SortBySize,
 112         SortByDate,
 113         SortByPermissions,
 114         SortByOwner,
 115         SortByGroup,
 116         SortByType,
 117         SortByRating,
 118         SortByTags,
 119         MaxSortEnum = SortByTags
 120     };
 121
 122     /**
 123      * @param parent           Parent widget of the view.
 124      * @param url              Specifies the content which should be shown.
 125      * @param dirLister        Used directory lister. The lister is not owned
 126      *                         by the view and won't get deleted.
 127      * @param dolphinModel     Used directory model. The model is not owned
 128      *                         by the view and won't get deleted.
 129      * @param proxyModel       Used proxy model which specifies the sorting. The
 130      *                         model is not owned by the view and won't get
 131      *                         deleted.
 132      */
 133     DolphinView(QWidget* parent,
 134                 const KUrl& url,
 135                 KDirLister* dirLister,
 136                 DolphinModel* dolphinModel,
 137                 DolphinSortFilterProxyModel* proxyModel);
 138
 139     virtual ~DolphinView();
 140
 141     /**
 142      * Returns the current active URL, where all actions are applied.
 143      * The URL navigator is synchronized with this URL.
 144      */
 145     const KUrl& url() const;
 146
 147     /**
 148      * Returns the root URL of the view, which is defined as the first
 149      * visible path of DolphinView::url(). Usually the root URL is
 150      * equal to DolphinView::url(), but in the case of the column view
 151      * when 2 columns are shown, the root URL might be:
 152      * /home/peter/Documents
 153      * and DolphinView::url() might return
 154      * /home/peter/Documents/Music/
 155      */
 156     KUrl rootUrl() const;
 157
 158     /**
 159      * If \a active is true, the view will marked as active. The active
 160      * view is defined as view where all actions are applied to.
 161      */
 162     void setActive(bool active);
 163     bool isActive() const;
 164
 165     /**
 166      * Changes the view mode for the current directory to \a mode.
 167      * If the view properties should be remembered for each directory
 168      * (GeneralSettings::globalViewProps() returns false), then the
 169      * changed view mode will be be stored automatically.
 170      */
 171     void setMode(Mode mode);
 172     Mode mode() const;
 173
 174     /**
 175      * Turns on the file preview for the all files of the current directory,
 176      * if \a show is true.
 177      * If the view properties should be remembered for each directory
 178      * (GeneralSettings::globalViewProps() returns false), then the
 179      * preview setting will be be stored automatically.
 180      */
 181     void setShowPreview(bool show);
 182     bool showPreview() const;
 183
 184     /**
 185      * Shows all hidden files of the current directory,
 186      * if \a show is true.
 187      * If the view properties should be remembered for each directory
 188      * (GeneralSettings::globalViewProps() returns false), then the
 189      * show hidden file setting will be be stored automatically.
 190      */
 191     void setShowHiddenFiles(bool show);
 192     bool showHiddenFiles() const;
 193
 194     /**
 195      * Summarizes all sorted items by their category \a categorized
 196      * is true.
 197      * If the view properties should be remembered for each directory
 198      * (GeneralSettings::globalViewProps() returns false), then the
 199      * categorized sorting setting will be be stored automatically.
 200      */
 201     void setCategorizedSorting(bool categorized);
 202     bool categorizedSorting() const;
 203
 204     /**
 205      * Returns true, if the categorized sorting is supported by the current
 206      * used mode (see DolphinView::setMode()). Currently only DolphinView::IconsView
 207      * supports categorizations. To check whether the categorized
 208      * sorting is set, use DolphinView::categorizedSorting().
 209      */
 210     bool supportsCategorizedSorting() const;
 211
 212     /**
 213      * Selects all items.
 214      * @see DolphinView::selectedItems()
 215      */
 216     void selectAll();
 217
 218     /**
 219      * Inverts the current selection: selected items get unselected,
 220      * unselected items get selected.
 221      * @see DolphinView::selectedItems()
 222      */
 223     void invertSelection();
 224
 225     /** Returns true, if at least one item is selected. */
 226     bool hasSelection() const;
 227
 228     void clearSelection();
 229
 230     /**
 231      * Returns the selected items. The list is empty if no item has been
 232      * selected.
 233      * @see DolphinView::selectedUrls()
 234      */
 235     KFileItemList selectedItems() const;
 236
 237     /**
 238      * Returns a list of URLs for all selected items. An empty list
 239      * is returned, if no item is selected.
 240      * @see DolphinView::selectedItems()
 241      */
 242     KUrl::List selectedUrls() const;
 243
 244     /**
 245      * Returns the file item for the given model index \a index.
 246      */
 247     KFileItem fileItem(const QModelIndex& index) const;
 248
 249     /**
 250      * Sets the upper left position of the view content
 251      * to (x,y). The content of the view might be larger than the visible area
 252      * and hence a scrolling must be done.
 253      */
 254     void setContentsPosition(int x, int y);
 255
 256     /** Returns the upper left position of the view content. */
 257     QPoint contentsPosition() const;
 258
 259     /** Increases the size of the current set view mode. */
 260     void zoomIn();
 261
 262     /** Decreases the size of the current set view mode. */
 263     void zoomOut();
 264
 265     /**
 266      * Returns true, if zooming in is possible. If false is returned,
 267      * the minimal zoom size is possible.
 268      */
 269     bool isZoomInPossible() const;
 270
 271     /**
 272      * Returns true, if zooming out is possible. If false is returned,
 273      * the maximum zoom size is possible.
 274      */
 275     bool isZoomOutPossible() const;
 276
 277     /** Sets the sort order of the items inside a directory (see DolphinView::Sorting). */
 278     void setSorting(Sorting sorting);
 279
 280     /** Returns the sort order of the items inside a directory (see DolphinView::Sorting). */
 281     Sorting sorting() const;
 282
 283     /** Sets the sort order (Qt::Ascending or Qt::Descending) for the items. */
 284     void setSortOrder(Qt::SortOrder order);
 285
 286     /** Returns the current used sort order (Qt::Ascending or Qt::Descending). */
 287     Qt::SortOrder sortOrder() const;
 288
 289     /** Sets the additional information which should be shown for the items. */
 290     void setAdditionalInfo(KFileItemDelegate::InformationList info);
 291
 292     /** Returns the additional information which should be shown for the items. */
 293     KFileItemDelegate::InformationList additionalInfo() const;
 294
 295     /** Reloads the current directory. */
 296     void reload();
 297
 298     /**
 299      * Refreshes the view to get synchronized with the (updated) Dolphin settings.
 300      * This method only needs to get invoked if the view settings for the Icons View,
 301      * Details View or Columns View have been changed.
 302      */
 303     void refresh();
 304
 305     /**
 306      * Changes the directory of the view to \a url. If \a rootUrl is empty, the view
 307      * properties from \a url are used for adjusting the view mode and the other properties.
 308      * If \a rootUrl is not empty, the view properties from the root URL are considered
 309      * instead. Specifying a root URL is only required if a view having a different root URL
 310      * (e. g. the column view) should be restored. Usually using DolphinView::setUrl()
 311      * is enough for changing the current URL.
 312      */
 313     void updateView(const KUrl& url, const KUrl& rootUrl);
 314
 315     /**
 316      * Filters the currently shown items by \a nameFilter. All items
 317      * which contain the given filter string will be shown.
 318      */
 319     void setNameFilter(const QString& nameFilter);
 320
 321     /**
 322      * Calculates the number of currently shown files into
 323      * \a fileCount and the number of folders into \a folderCount.
 324      * It is recommend using this method instead of asking the
 325      * directory lister or the model directly, as it takes
 326      * filtering and hierarchical previews into account.
 327      */
 328     void calculateItemCount(int& fileCount, int& folderCount);
 329
 330     /**
 331      * Returns the "switch to icons mode" action.
 332      * This code is here to share it between the mainwindow and the part
 333      */
 334     static KToggleAction* iconsModeAction(KActionCollection* collection);
 335
 336     /**
 337      * Returns the "switch to details mode" action.
 338      * This code is here to share it between the mainwindow and the part
 339      */
 340     static KToggleAction* detailsModeAction(KActionCollection* collection);
 341
 342     /**
 343      * Returns the "switch to columns mode" action.
 344      * This code is here to share it between the mainwindow and the part
 345      */
 346     static KToggleAction* columnsModeAction(KActionCollection* collection);
 347
 348     /**
 349      * Creates the rename action.
 350      * This code is here to share it between the mainwindow and the part
 351      */
 352     static KAction* createRenameAction(KActionCollection* collection);
 353
 354     /**
 355      * Creates the "move to trash" action.
 356      * This code is here to share it between the mainwindow and the part
 357      */
 358     static KAction* createMoveToTrashAction(KActionCollection* collection);
 359
 360     /**
 361      * Creates the delete action.
 362      * This code is here to share it between the mainwindow and the part
 363      */
 364     static KAction* createDeleteAction(KActionCollection* collection);
 365
 366     /**
 367      * Creates the "new directory" action.
 368      * This code is here to share it between the mainwindow and the part
 369      */
 370     static KAction* createNewDirAction(KActionCollection* collection);
 371
 372     /**
 373      * Creates the "sort descending" action.
 374      * This code is here to share it between the mainwindow and the part
 375      */
 376     static KAction* createSortDescendingAction(KActionCollection* collection);
 377
 378     /**
 379      * Creates an action group with all the "show additional information" actions in it.
 380      * This code is here to share it between the mainwindow and the part
 381      */
 382     static QActionGroup* createAdditionalInformationActionGroup(KActionCollection* collection);
 383
 384     /**
 385      * Updates the state of the 'Additional Information' actions in \a collection.
 386      */
 387     void updateAdditionalInfoActions(KActionCollection* collection);
 388
 389     /**
 390      * Returns the action name corresponding to the current view mode
 391      */
 392     QString currentViewModeActionName() const;
 393
 394     /**
 395      * Returns the state of the paste action:
 396      * first is whether the action should be enabled
 397      * second is the text for the action
 398      */
 399     QPair<bool, QString> pasteInfo() const;
 400
 401 public slots:
 402     /**
 403      * Changes the directory to \a url. If the current directory is equal to
 404      * \a url, nothing will be done (use DolphinView::reload() instead).
 405      */
 406     void setUrl(const KUrl& url);
 407
 408     /**
 409      * Request of a selection change. The view will do its best to accommodate
 410      * the request, but it is not guaranteed that all items in \a selection
 411      * will actually get selected. The view will e.g. not select items which
 412      * are not in the currently displayed folder.
 413      */
 414     void changeSelection(const KFileItemList& selection);
 415
 416     /**
 417      * Triggers the renaming of the currently selected items, where
 418      * the user must input a new name for the items.
 419      */
 420     void renameSelectedItems();
 421
 422     /**
 423      * Moves all selected items to the trash.
 424      */
 425     void trashSelectedItems();
 426
 427     /**
 428      * Deletes all selected items.
 429      */
 430     void deleteSelectedItems();
 431
 432     /**
 433      * Copies all selected items to the clipboard and marks
 434      * the items as cutted.
 435      */
 436     void cutSelectedItems();
 437
 438     /** Copies all selected items to the clipboard. */
 439     void copySelectedItems();
 440
 441     /** Pastes the clipboard data to this view. */
 442     void paste();
 443
 444     /** Switches between an ascending and descending sorting order. */
 445     void toggleSortOrder();
 446
 447     /**
 448      * Switches on or off the displaying of additional information
 449      * as specified by \a action.
 450      */
 451     void toggleAdditionalInfo(QAction* action);
 452
 453 signals:
 454     /**
 455      * Is emitted if the view has been activated by e. g. a mouse click.
 456      */
 457     void activated();
 458
 459     /** Is emitted if URL of the view has been changed to \a url. */
 460     void urlChanged(const KUrl& url);
 461
 462     /**
 463      * Is emitted when clicking on an item
 464      */
 465     void itemTriggered(const KFileItem& item);
 466
 467     /**
 468      * Is emitted if the view mode (IconsView, DetailsView,
 469      * PreviewsView) has been changed.
 470      */
 471     void modeChanged();
 472
 473     /** Is emitted if the 'show preview' property has been changed. */
 474     void showPreviewChanged();
 475
 476     /** Is emitted if the 'show hidden files' property has been changed. */
 477     void showHiddenFilesChanged();
 478
 479     /** Is emitted if the 'categorized sorting' property has been changed. */
 480     void categorizedSortingChanged();
 481
 482     /** Is emitted if the sorting by name, size or date has been changed. */
 483     void sortingChanged(DolphinView::Sorting sorting);
 484
 485     /** Is emitted if the sort order (ascending or descending) has been changed. */
 486     void sortOrderChanged(Qt::SortOrder order);
 487
 488     /** Is emitted if the additional information shown for this view has been changed. */
 489     void additionalInfoChanged();
 490
 491     /**
 492      * Is emitted if information of an item is requested to be shown e. g. in the sidebar.
 493      * If item is null, no item information request is pending.
 494      */
 495     void requestItemInfo(const KFileItem& item);
 496
 497     /** Is emitted if the contents has been moved to \a x, \a y. */
 498     void contentsMoved(int x, int y);
 499
 500     /**
 501      * Is emitted whenever the selection has been changed.
 502      */
 503     void selectionChanged(const KFileItemList& selection);
 504
 505     /**
 506      * Is emitted if a context menu is requested for the item \a item,
 507      * which is part of \a url. If the item is 0, the context menu
 508      * for the URL should be shown.
 509      */
 510     void requestContextMenu(const KFileItem& item, const KUrl& url);
 511
 512     /**
 513      * Is emitted if an information message with the content \a msg
 514      * should be shown.
 515      */
 516     void infoMessage(const QString& msg);
 517
 518     /**
 519      * Is emitted if an error message with the content \a msg
 520      * should be shown.
 521      */
 522     void errorMessage(const QString& msg);
 523
 524     /**
 525      * Is emitted if an "operation completed" message with the content \a msg
 526      * should be shown.
 527      */
 528     void operationCompletedMessage(const QString& msg);
 529
 530     /**
 531      * Is emitted after DolphinView::setUrl() has been invoked and
 532      * the path \a url is currently loaded. If this signal is emitted,
 533      * it is assured that the view contains already the correct root
 534      * URL and property settings.
 535      */
 536     void startedPathLoading(const KUrl& url);
 537
 538     /**
 539      * Is emitted when renaming, copying, moving, linking etc.
 540      * Used for feedback in the mainwindow.
 541      */
 542     void doingOperation(KonqFileUndoManager::CommandType type);
 543
 544 protected:
 545     /** @see QWidget::mouseReleaseEvent */
 546     virtual void mouseReleaseEvent(QMouseEvent* event);
 547
 548 private slots:
 549     /**
 550      * Marks the view as active (DolphinView:isActive() will return true)
 551      * and emits the 'activated' signal if it is not already active.
 552      */
 553     void activate();
 554
 555     /**
 556      * If the item \a item is a directory, then this
 557      * directory will be loaded. If the  item is a file, the corresponding
 558      * application will get started.
 559      */
 560     void triggerItem(const KFileItem& index);
 561
 562     /**
 563      * Generates a preview image for each file item in \a items.
 564      * The current preview settings (maximum size, 'Show Preview' menu)
 565      * are respected.
 566      */
 567     void generatePreviews(const KFileItemList& items);
 568
 569     /**
 570      * Replaces the icon of the item \a item by the preview pixmap
 571      * \a pixmap.
 572      */
 573     void replaceIcon(const KFileItem& item, const QPixmap& pixmap);
 574
 575     void emitSelectionChangedSignal();
 576
 577     /**
 578      * Opens the context menu on position \a pos. The position
 579      * is used to check whether the context menu is related to an
 580      * item or to the viewport.
 581      */
 582     void openContextMenu(const QPoint& pos);
 583
 584     /**
 585      * Drops the URLs \a urls to the destination path \a destPath. If
 586      * the URLs are dropped above an item inside the destination path,
 587      * the item is indicated by \a destItem.
 588      */
 589     void dropUrls(const KUrl::List& urls,
 590                   const KUrl& destPath,
 591                   const KFileItem& destItem);
 592
 593     /**
 594      * Handles the dropping of URLs to the given destination.
 595      * @see DolphinDropController
 596      */
 597     void dropUrls(const KUrl::List& urls,
 598                   const KUrl& destination);
 599     /**
 600      * Updates the view properties of the current URL to the
 601      * sorting given by \a sorting.
 602      */
 603     void updateSorting(DolphinView::Sorting sorting);
 604
 605     /**
 606      * Updates the view properties of the current URL to the
 607      * sort order given by \a order.
 608      */
 609     void updateSortOrder(Qt::SortOrder order);
 610
 611     /**
 612      * Updates the view properties of the current URL to the
 613      * additional information given by \a info.
 614      */
 615     void updateAdditionalInfo(const KFileItemDelegate::InformationList& info);
 616
 617     /**
 618      * Emits the signal contentsMoved with the current coordinates
 619      * of the viewport as parameters.
 620      */
 621     void emitContentsMoved();
 622
 623     /** Applies an item effect to all cut items of the clipboard. */
 624     void updateCutItems();
 625
 626     /**
 627      * Updates the status bar to show hover information for the
 628      * item \a item. If currently other items are selected,
 629      * no hover information is shown.
 630      * @see DolphinView::clearHoverInformation()
 631      */
 632     void showHoverInformation(const KFileItem& item);
 633
 634     /**
 635      * Clears the hover information shown in the status bar.
 636      * @see DolphinView::showHoverInformation().
 637      */
 638     void clearHoverInformation();
 639
 640     /**
 641      * Indicates in the status bar that the delete operation
 642      * of the job \a job has been finished.
 643      */
 644     void slotDeleteFileFinished(KJob* job);
 645
 646     /**
 647      * Is invoked when the preview job has been finished and
 648      * set m_previewJob to 0.
 649      */
 650     void slotPreviewJobFinished(KJob* job);
 651
 652 private:
 653     void loadDirectory(const KUrl& url, bool reload = false);
 654
 655     /**
 656      * Returns the URL where the view properties should be stored. Usually
 657      * DolphinView::url() is returned, but in the case of a Column View the
 658      * view properties are always stored in the directory represented by the
 659      * first column. It is recommendend whenever using the ViewProperties class
 660      * to use DolphinView::viewPropertiesUrl() as URL.
 661      */
 662     KUrl viewPropertiesUrl() const;
 663
 664     /**
 665      * Applies the view properties which are defined by the current URL
 666      * m_url to the DolphinView properties.
 667      */
 668     void applyViewProperties(const KUrl& url);
 669
 670     /**
 671      * Creates a new view representing the given view mode (DolphinView::mode()).
 672      * The current view will get deleted.
 673      */
 674     void createView();
 675
 676     void deleteView();
 677
 678     /**
 679      * Returns a pointer to the currently used item view, which is either
 680      * a ListView or a TreeView.
 681      */
 682     QAbstractItemView* itemView() const;
 683
 684     /**
 685      * Returns true, if the item \a item has been cut into
 686      * the clipboard.
 687      */
 688     bool isCutItem(const KFileItem& item) const;
 689
 690     /** Applies an item effect to all cut items. */
 691     void applyCutItemEffect();
 692
 693     /**
 694      * Returns true, if the ColumnView is activated. As the column view
 695      * requires some special handling for iterating through directories,
 696      * this method has been introduced for convenience.
 697      */
 698     bool isColumnViewActive() const
 699     {
 700         return m_columnView != 0;
 701     }
 702
 703 private:
 704     /**
 705      * Remembers the original pixmap for an item before
 706      * the cut effect is applied.
 707      */
 708     struct CutItem
 709     {
 710         KUrl url;
 711         QPixmap pixmap;
 712     };
 713
 714     bool m_active;
 715     bool m_showPreview;
 716     bool m_loadingDirectory;
 717     bool m_storedCategorizedSorting;
 718     Mode m_mode;
 719
 720     DolphinMainWindow* m_mainWindow;
 721     QVBoxLayout* m_topLayout;
 722
 723     DolphinController* m_controller;
 724     DolphinIconsView* m_iconsView;
 725     DolphinDetailsView* m_detailsView;
 726     DolphinColumnView* m_columnView;
 727     KFileItemDelegate* m_fileItemDelegate;
 728     QItemSelectionModel* m_selectionModel;
 729
 730     DolphinModel* m_dolphinModel;
 731     KDirLister* m_dirLister;
 732     DolphinSortFilterProxyModel* m_proxyModel;
 733
 734     KIO::PreviewJob* m_previewJob;
 735
 736     QList<CutItem> m_cutItemsCache;
 737
 738     KUrl m_rootUrl;
 739 };
 740
 741 /// Allow using DolphinView::Mode in QVariant
 742 Q_DECLARE_METATYPE(DolphinView::Mode)
 743
 744 #endif // DOLPHINVIEW_H