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 <kparts/part.h>
  26 #include <kfileitem.h>
  27 #include <kfileiconview.h>
  28 #include <kio/job.h>
  29
  30 #include <urlnavigator.h>
  31
  32 #include <QDropEvent>
  33 #include <QLinkedList>
  34 #include <QListView>
  35 #include <QMouseEvent>
  36 #include <QVBoxLayout>
  37 #include <QWidget>
  38
  39 class DolphinController;
  40 class FilterBar;
  41 class KUrl;
  42 class KDirModel;
  43 class UrlNavigator;
  44 class DolphinDetailsView;
  45 class DolphinDirLister;
  46 class DolphinIconsView;
  47 class DolphinMainWindow;
  48 class DolphinSortFilterProxyModel;
  49 class DolphinStatusBar;
  50 class QModelIndex;
  51 class QPainter;
  52 class QTimer;
  53 class ViewProperties;
  54
  55 /**
  56  * @short Represents a view for the directory content
  57  *        including the navigation bar, filter bar and status bar.
  58  *
  59  * View modes for icons and details are supported. Currently
  60  * Dolphin allows to have up to two views inside the main window.
  61  *
  62  * @see DolphinIconsView
  63  * @see DolphinDetailsView
  64  * @see UrlNavigator
  65  * @see DolphinStatusBar
  66  */
  67 class DolphinView : public QWidget
  68 {
  69     Q_OBJECT
  70
  71 public:
  72         /**
  73      * Defines the view mode for a directory. The view mode
  74      * can be defined when constructing a DolphinView. The
  75      * view mode is automatically updated if the directory itself
  76      * defines a view mode (see class ViewProperties for details).
  77      */
  78     enum Mode
  79     {
  80         /**
  81          * The directory items are shown as icons including an
  82          * icon name. */
  83         IconsView = 0,
  84
  85         /**
  86          * The icon, the name and at least the size of the directory
  87          * items are shown in a table. It is possible to add columns
  88          * for date, group and permissions.
  89          */
  90         DetailsView = 1,
  91         MaxModeEnum = DetailsView
  92     };
  93
  94     /** Defines the sort order for the items of a directory. */
  95     enum Sorting
  96     {
  97         SortByName = 0,
  98         SortBySize,
  99         SortByDate,
 100         SortByPermissions,
 101         SortByOwner,
 102         SortByGroup,
 103         MaxSortEnum = SortByGroup
 104     };
 105
 106     DolphinView(DolphinMainWindow* mainwindow,
 107                 QWidget *parent,
 108                 const KUrl& url,
 109                 Mode mode = IconsView,
 110                 bool showHiddenFiles = false);
 111
 112     virtual ~DolphinView();
 113
 114     /**
 115      * Sets the current active URL.
 116      * The signals UrlNavigator::urlChanged() and UrlNavigator::historyChanged()
 117      * are emitted.
 118      */
 119     void setUrl(const KUrl& url);
 120
 121     /** Returns the current active URL. */
 122     const KUrl& url() const;
 123
 124     /**
 125      * Returns true if the view is active and hence all actions are
 126      * applied to this view.
 127      */
 128     bool isActive() const;
 129
 130     /**
 131      * Changes the view mode for the current directory to \a mode.
 132      * If the view properties should be remembered for each directory
 133      * (GeneralSettings::globalViewProps() returns false), then the
 134      * changed view mode will be be stored automatically.
 135      */
 136     void setMode(Mode mode);
 137     Mode mode() const;
 138
 139     /**
 140      * Turns on the file preview for the all files of the current directory,
 141      * if \a show is true.
 142      * If the view properties should be remembered for each directory
 143      * (GeneralSettings::globalViewProps() returns false), then the
 144      * preview setting will be be stored automatically.
 145      */
 146     void setShowPreview(bool show);
 147     bool showPreview() const;
 148
 149     /**
 150      * Shows all hidden files of the current directory,
 151      * if \a show is true.
 152      * If the view properties should be remembered for each directory
 153      * (GeneralSettings::globalViewProps() returns false), then the
 154      * show hidden file setting will be be stored automatically.
 155      */
 156     void setShowHiddenFiles(bool show);
 157     bool showHiddenFiles() const;
 158
 159     /**
 160      * Triggers the renaming of the currently selected items, where
 161      * the user must input a new name for the items.
 162      */
 163     void renameSelectedItems();
 164
 165     /**
 166      * Selects all items.
 167      * @see DolphinView::selectedItems()
 168      */
 169     void selectAll();
 170
 171     /**
 172      * Inverts the current selection: selected items get unselected,
 173      * unselected items get selected.
 174      * @see DolphinView::selectedItems()
 175      */
 176     void invertSelection();
 177
 178     /**
 179      * Goes back one step in the URL history. The signals
 180      * UrlNavigator::urlChanged() and UrlNavigator::historyChanged()
 181      * are submitted.
 182      */
 183     void goBack();
 184
 185     /**
 186      * Goes forward one step in the Url history. The signals
 187      * UrlNavigator::urlChanged() and UrlNavigator::historyChanged()
 188      * are submitted.
 189      */
 190     void goForward();
 191
 192     /**
 193      * Goes up one step of the Url path. The signals
 194      * UrlNavigator::urlChanged() and UrlNavigator::historyChanged()
 195      * are submitted.
 196      */
 197     void goUp();
 198
 199     /**
 200      * Goes to the home URL. The signals UrlNavigator::urlChanged()
 201      * and UrlNavigator::historyChanged() are submitted.
 202      */
 203     void goHome();
 204
 205     /**
 206      * Sets the URL of the navigation bar to an editable state
 207      * if \a editable is true. If \a editable is false, each part of
 208      * the location is presented by a button for a fast navigation.
 209      */
 210     void setUrlEditable(bool editable);
 211
 212     /**
 213      * Returns the complete URL history. The index 0 indicates the oldest
 214      * history element.
 215      * @param index     Output parameter which indicates the current
 216      *                  index of the location.
 217      */
 218     const QLinkedList<UrlNavigator::HistoryElem> urlHistory(int& index) const;
 219
 220     /**
 221      * Returns true, if at least one item is selected.
 222      */
 223     bool hasSelection() const;
 224
 225     /**
 226      * Returns the selected items. The list is empty if no item has been
 227      * selected.
 228      * @see DolphinView::selectedUrls()
 229      */
 230     KFileItemList selectedItems() const;
 231
 232     /**
 233      * Returns a list of URLs for all selected items. An empty list
 234      * is returned, if no item is selected.
 235      * @see DolphinView::selectedItems()
 236      */
 237     KUrl::List selectedUrls() const;
 238
 239     /**
 240      * Returns the file item for the given model index \a index.
 241      */
 242     KFileItem* fileItem(const QModelIndex index) const;
 243
 244     /**
 245      * Renames the filename of the source URL by the new file name.
 246      * If the new file name already exists, a dialog is opened which
 247      * asks the user to enter a new name.
 248      */
 249     void rename(const KUrl& source, const QString& newName);
 250
 251     /** Returns the status bar of the view. */
 252     DolphinStatusBar* statusBar() const;
 253
 254     /**
 255      * Returns the x-position of the view content.
 256      * The content of the view might be larger than the visible area
 257      * and hence a scrolling must be done.
 258      */
 259     int contentsX() const;
 260
 261     /**
 262      * Returns the y-position of the view content.
 263      * The content of the view might be larger than the visible area
 264      * and hence a scrolling must be done.
 265      */
 266     int contentsY() const;
 267
 268     /**
 269      * Returns true, if the URL shown by the navigation bar is editable.
 270      * @see UrlNavigator
 271      */
 272     bool isUrlEditable() const;
 273
 274     /** Increases the size of the current set view mode. */
 275     void zoomIn();
 276
 277     /** Decreases the size of the current set view mode. */
 278     void zoomOut();
 279
 280     /**
 281      * Returns true, if zooming in is possible. If false is returned,
 282      * the minimal zoom size is possible.
 283      */
 284     bool isZoomInPossible() const;
 285
 286     /**
 287      * Returns true, if zooming out is possible. If false is returned,
 288      * the maximum zoom size is possible.
 289      */
 290     bool isZoomOutPossible() const;
 291
 292     /** Sets the sort order of the items inside a directory (see DolphinView::Sorting). */
 293     void setSorting(Sorting sorting);
 294
 295     /** Returns the sort order of the items inside a directory (see DolphinView::Sorting). */
 296     Sorting sorting() const;
 297
 298     /** Sets the sort order (Qt::Ascending or Qt::Descending) for the items. */
 299     void setSortOrder(Qt::SortOrder order);
 300
 301     /** Returns the current used sort order (Qt::Ascending or Qt::Descending). */
 302     Qt::SortOrder sortOrder() const;
 303
 304     /** Refreshs the view settings by reading out the stored settings. */
 305     void refreshSettings();
 306
 307     /** Returns the UrlNavigator of the view for read access. */
 308     const UrlNavigator* urlNavigator() const { return m_urlNavigator; }
 309
 310     /**
 311      * Triggers to request user information for the item given
 312      * by the URL \a url. The signal requestItemInfo is emitted,
 313      * which provides a way for widgets to get an indication to update
 314      * the item information.
 315      */
 316     void emitRequestItemInfo(const KUrl& url);
 317
 318     /** Returns true, if the filter bar is visible. */
 319     bool isFilterBarVisible() const;
 320
 321     /**
 322      * Return the DolphinMainWindow this View belongs to. It is guranteed
 323      * that we have one.
 324      */
 325     DolphinMainWindow* mainWindow() const ;
 326
 327     /** Reloads the current directory. */
 328     void reload();
 329
 330 public slots:
 331     /**
 332      * Popups the filter bar above the status bar if \a show is true.
 333      */
 334     void showFilterBar(bool show);
 335
 336     /**
 337      * Updates the number of items (= number of files + number of
 338      * directories) in the statusbar. If files are selected, the number
 339      * of selected files and the sum of the filesize is shown.
 340      */
 341     void updateStatusBar();
 342
 343     /**
 344      * Requests the main window to set this view as active view, which
 345      * means that all actions are applied to this view.
 346      */
 347     void requestActivation();
 348
 349 signals:
 350     /** Is emitted if URL of the view has been changed to \a url. */
 351     void urlChanged(const KUrl& url);
 352
 353     /**
 354      * Is emitted if the view mode (IconsView, DetailsView,
 355      * PreviewsView) has been changed.
 356      */
 357     void modeChanged();
 358
 359     /** Is emitted if the 'show preview' property has been changed. */
 360     void showPreviewChanged();
 361
 362     /** Is emitted if the 'show hidden files' property has been changed. */
 363     void showHiddenFilesChanged();
 364
 365     /** Is emitted if the sorting by name, size or date has been changed. */
 366     void sortingChanged(DolphinView::Sorting sorting);
 367
 368     /** Is emitted if the sort order (ascending or descending) has been changed. */
 369     void sortOrderChanged(Qt::SortOrder order);
 370
 371     /**
 372      * Is emitted if information of an item is requested to be shown e. g. in the sidebar.
 373      * It the URL is empty, no item information request is pending.
 374      */
 375     void requestItemInfo(const KUrl& url);
 376
 377     /** Is emitted if the contents has been moved to \a x, \a y. */
 378     void contentsMoved(int x, int y);
 379
 380     /**
 381      * Is emitted whenever the selection has been changed. The current selection can
 382      * be retrieved by mainWindow()->activeView()->selectedItems() or by
 383      * mainWindow()->activeView()->selectedUrls().
 384      */
 385     void selectionChanged();
 386
 387     /**
 388      * Is emitted whenever the filter bar has been turned show or hidden.
 389      */
 390     void showFilterBarChanged(bool shown);
 391
 392 protected:
 393     /** @see QWidget::mouseReleaseEvent */
 394     virtual void mouseReleaseEvent(QMouseEvent* event);
 395
 396 private slots:
 397     void loadDirectory(const KUrl& kurl);
 398     void triggerItem(const QModelIndex& index);
 399     void updateProgress(int percent);
 400
 401     /**
 402      * Updates the number of items (= number of directories + number of files)
 403      * and shows this information in the statusbar.
 404      */
 405     void updateItemCount();
 406
 407     /**
 408      * Generates a preview image for each file item in \a items.
 409      * The current preview settings (maximum size, 'Show Preview' menu)
 410      * are respected.
 411      */
 412     void generatePreviews(const KFileItemList& items);
 413
 414     /**
 415      * Replaces the icon of the item \a item by the preview pixmap
 416      * \a pixmap.
 417      */
 418     void showPreview(const KFileItem* item, const QPixmap& pixmap);
 419
 420     /**
 421      * Restores the x- and y-position of the contents if the
 422      * current view is part of the history.
 423      */
 424     void restoreContentsPos();
 425
 426     /** Shows the information \a msg inside the statusbar. */
 427     void showInfoMessage(const QString& msg);
 428
 429     /** Shows the error message \a msg inside the statusbar. */
 430     void showErrorMessage(const QString& msg);
 431
 432     void emitSelectionChangedSignal();
 433     void closeFilterBar();
 434
 435     /**
 436      * Filters the currently shown items by \a nameFilter. All items
 437      * which contain the given filter string will be shown.
 438      */
 439     void changeNameFilter(const QString& nameFilter);
 440
 441     /**
 442      * Opens the context menu on position \a pos. The position
 443      * is used to check whether the context menu is related to an
 444      * item or to the viewport.
 445      */
 446     void openContextMenu(const QPoint& pos);
 447
 448     /**
 449      * Drops the URLs \a urls at the position \a pos.
 450      * The position is used to check whether the dropping
 451      * is done above an item or above the viewport.
 452      */
 453     void dropUrls(const KUrl::List& urls,
 454                   const QPoint& pos);
 455
 456     /**
 457      * Drops the URLs \a urls at the
 458      * destination \a destination.
 459      */
 460     void dropUrls(const KUrl::List& urls,
 461                   const KUrl& destination);
 462     /**
 463      * Updates the view properties of the current URL to the
 464      * sorting given by \a sorting.
 465      */
 466     void updateSorting(DolphinView::Sorting sorting);
 467
 468     /**
 469      * Updates the view properties of the current URL to the
 470      * sort order given by \a order.
 471      */
 472     void updateSortOrder(Qt::SortOrder order);
 473
 474     /**
 475      * Emits the signal contentsMoved with the current coordinates
 476      * of the viewport as parameters.
 477      */
 478     void emitContentsMoved();
 479
 480     /**
 481      * Updates the activation state of the view by checking whether
 482      * the currently active view is this view.
 483      */
 484     void updateActivationState();
 485
 486 private:
 487     void startDirLister(const KUrl& url, bool reload = false);
 488
 489     /**
 490      * Returns the default text of the status bar, if no item is
 491      * selected.
 492      */
 493     QString defaultStatusBarText() const;
 494
 495     /**
 496      * Returns the text for the status bar, if at least one item
 497      * is selected.
 498      */
 499     QString selectionStatusBarText() const;
 500
 501     /**
 502      * Creates a new view representing the given view mode (DolphinView::viewMode()).
 503      * The current view will get deleted.
 504      */
 505     void createView();
 506
 507     /**
 508      * Selects all items by using the selection flags \a flags. This is a helper
 509      * method for the slots DolphinView::selectAll() and DolphinView::invertSelection().
 510      */
 511     void selectAll(QItemSelectionModel::SelectionFlags flags);
 512
 513     /**
 514      * Returns a pointer to the currently used item view, which is either
 515      * a ListView or a TreeView.
 516      */
 517     QAbstractItemView* itemView() const;
 518
 519     /**
 520      * Returns true if the index is valid and represents
 521      * the column KDirModel::Name.
 522      */
 523     bool isValidNameIndex(const QModelIndex& index) const;
 524
 525 private:
 526     bool m_showProgress;
 527     Mode m_mode;
 528
 529     int m_iconSize;
 530     int m_folderCount;
 531     int m_fileCount;
 532
 533     DolphinMainWindow* m_mainWindow;
 534     QVBoxLayout* m_topLayout;
 535     UrlNavigator* m_urlNavigator;
 536
 537     DolphinController* m_controller;
 538     DolphinIconsView* m_iconsView;
 539     DolphinDetailsView* m_detailsView;
 540
 541     FilterBar* m_filterBar;
 542     DolphinStatusBar* m_statusBar;
 543
 544     KDirModel* m_dirModel;
 545     DolphinDirLister* m_dirLister;
 546     DolphinSortFilterProxyModel* m_proxyModel;
 547 };
 548
 549 #endif // _DOLPHINVIEW_H_