src/dolphinview.cpp

   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 #include "dolphinview.h"
  22
  23 #include <QApplication>
  24 #include <QClipboard>
  25 #include <QKeyEvent>
  26 #include <QItemSelection>
  27 #include <QBoxLayout>
  28 #include <QTimer>
  29 #include <QScrollBar>
  30
  31 #include <kcolorscheme.h>
  32 #include <kdirlister.h>
  33 #include <kfileitemdelegate.h>
  34 #include <klocale.h>
  35 #include <kiconeffect.h>
  36 #include <kio/netaccess.h>
  37 #include <kio/renamedialog.h>
  38 #include <kio/previewjob.h>
  39 #include <kmimetyperesolver.h>
  40 #include <konqmimedata.h>
  41 #include <konq_operations.h>
  42 #include <kurl.h>
  43
  44 #include "dolphinmodel.h"
  45 #include "dolphincolumnview.h"
  46 #include "dolphincontroller.h"
  47 #include "dolphinsortfilterproxymodel.h"
  48 #include "dolphindetailsview.h"
  49 #include "dolphiniconsview.h"
  50 #include "renamedialog.h"
  51 #include "viewproperties.h"
  52 #include "dolphinsettings.h"
  53 #include "dolphin_generalsettings.h"
  54 #include "dolphincategorydrawer.h"
  55
  56 DolphinView::DolphinView(QWidget* parent,
  57                          const KUrl& url,
  58                          KDirLister* dirLister,
  59                          DolphinModel* dolphinModel,
  60                          DolphinSortFilterProxyModel* proxyModel) :
  61     QWidget(parent),
  62     m_active(true),
  63     m_loadingDirectory(false),
  64     m_initializeColumnView(false),
  65     m_mode(DolphinView::IconsView),
  66     m_topLayout(0),
  67     m_controller(0),
  68     m_iconsView(0),
  69     m_detailsView(0),
  70     m_columnView(0),
  71     m_fileItemDelegate(0),
  72     m_dolphinModel(dolphinModel),
  73     m_dirLister(dirLister),
  74     m_proxyModel(proxyModel)
  75 {
  76     setFocusPolicy(Qt::StrongFocus);
  77     m_topLayout = new QVBoxLayout(this);
  78     m_topLayout->setSpacing(0);
  79     m_topLayout->setMargin(0);
  80
  81     QClipboard* clipboard = QApplication::clipboard();
  82     connect(clipboard, SIGNAL(dataChanged()),
  83             this, SLOT(updateCutItems()));
  84
  85     connect(m_dirLister, SIGNAL(completed()),
  86             this, SLOT(updateCutItems()));
  87     connect(m_dirLister, SIGNAL(newItems(const QList<KFileItem>&)),
  88             this, SLOT(generatePreviews(const QList<KFileItem>&)));
  89
  90     m_controller = new DolphinController(this);
  91     m_controller->setUrl(url);
  92     connect(m_controller, SIGNAL(urlChanged(const KUrl&)),
  93             this, SIGNAL(urlChanged(const KUrl&)));
  94     connect(m_controller, SIGNAL(requestContextMenu(const QPoint&)),
  95             this, SLOT(openContextMenu(const QPoint&)));
  96     connect(m_controller, SIGNAL(urlsDropped(const KUrl::List&, const KUrl&, const QModelIndex&, QWidget*)),
  97             this, SLOT(dropUrls(const KUrl::List&, const KUrl&, const QModelIndex&, QWidget*)));
  98     connect(m_controller, SIGNAL(sortingChanged(DolphinView::Sorting)),
  99             this, SLOT(updateSorting(DolphinView::Sorting)));
 100     connect(m_controller, SIGNAL(sortOrderChanged(Qt::SortOrder)),
 101             this, SLOT(updateSortOrder(Qt::SortOrder)));
 102     connect(m_controller, SIGNAL(itemTriggered(const QModelIndex&)),
 103             this, SLOT(triggerItem(const QModelIndex&)));
 104     connect(m_controller, SIGNAL(activated()),
 105             this, SLOT(activate()));
 106     connect(m_controller, SIGNAL(itemEntered(const QModelIndex&)),
 107             this, SLOT(showHoverInformation(const QModelIndex&)));
 108     connect(m_controller, SIGNAL(viewportEntered()),
 109             this, SLOT(clearHoverInformation()));
 110
 111     applyViewProperties(url);
 112     m_topLayout->addWidget(itemView());
 113 }
 114
 115 DolphinView::~DolphinView()
 116 {
 117 }
 118
 119 const KUrl& DolphinView::url() const
 120 {
 121     return m_controller->url();
 122 }
 123
 124 KUrl DolphinView::rootUrl() const
 125 {
 126     return isColumnViewActive() ? m_dirLister->url() : url();
 127 }
 128
 129 void DolphinView::setActive(bool active)
 130 {
 131     if (active == m_active) {
 132         return;
 133     }
 134
 135     m_active = active;
 136
 137     updateViewportColor();
 138     update();
 139
 140     if (active) {
 141         emit activated();
 142     }
 143 }
 144
 145 bool DolphinView::isActive() const
 146 {
 147     return m_active;
 148 }
 149
 150 void DolphinView::setMode(Mode mode)
 151 {
 152     if (mode == m_mode) {
 153         return; // the wished mode is already set
 154     }
 155
 156     m_mode = mode;
 157
 158     if (isColumnViewActive()) {
 159         // When changing the mode in the column view, it makes sense
 160         // to go back to the root URL of the column view automatically.
 161         // Otherwise there it would not be possible to turn off the column view
 162         // without focusing the first column.
 163         setUrl(m_dirLister->url());
 164         m_controller->setUrl(m_dirLister->url());
 165     }
 166
 167     const KUrl viewPropsUrl = viewPropertiesUrl();
 168     ViewProperties props(viewPropsUrl);
 169     props.setViewMode(m_mode);
 170
 171     createView();
 172     startDirLister(viewPropsUrl);
 173
 174     emit modeChanged();
 175 }
 176
 177 DolphinView::Mode DolphinView::mode() const
 178 {
 179     return m_mode;
 180 }
 181
 182 void DolphinView::setShowPreview(bool show)
 183 {
 184     const KUrl viewPropsUrl = viewPropertiesUrl();
 185     ViewProperties props(viewPropsUrl);
 186     props.setShowPreview(show);
 187
 188     m_controller->setShowPreview(show);
 189     emit showPreviewChanged();
 190
 191     startDirLister(viewPropsUrl, true);
 192 }
 193
 194 bool DolphinView::showPreview() const
 195 {
 196     return m_controller->showPreview();
 197 }
 198
 199 void DolphinView::setShowHiddenFiles(bool show)
 200 {
 201     if (m_dirLister->showingDotFiles() == show) {
 202         return;
 203     }
 204
 205     const KUrl viewPropsUrl = viewPropertiesUrl();
 206     ViewProperties props(viewPropsUrl);
 207     props.setShowHiddenFiles(show);
 208
 209     m_dirLister->setShowingDotFiles(show);
 210     emit showHiddenFilesChanged();
 211
 212     startDirLister(viewPropsUrl, true);
 213 }
 214
 215 bool DolphinView::showHiddenFiles() const
 216 {
 217     return m_dirLister->showingDotFiles();
 218 }
 219
 220 void DolphinView::setCategorizedSorting(bool categorized)
 221 {
 222     if (!supportsCategorizedSorting() || (categorized == categorizedSorting())) {
 223         return;
 224     }
 225
 226     Q_ASSERT(m_iconsView != 0);
 227
 228     ViewProperties props(viewPropertiesUrl());
 229     props.setCategorizedSorting(categorized);
 230     props.save();
 231
 232     m_proxyModel->setCategorizedModel(categorized);
 233     m_proxyModel->sort(m_proxyModel->sortColumn(), m_proxyModel->sortOrder());
 234
 235     emit categorizedSortingChanged();
 236 }
 237
 238 bool DolphinView::categorizedSorting() const
 239 {
 240     return m_proxyModel->isCategorizedModel();
 241 }
 242
 243 bool DolphinView::supportsCategorizedSorting() const
 244 {
 245     return m_iconsView != 0;
 246 }
 247
 248 void DolphinView::selectAll()
 249 {
 250     itemView()->selectAll();
 251 }
 252
 253 void DolphinView::invertSelection()
 254 {
 255     QItemSelectionModel* selectionModel = itemView()->selectionModel();
 256     const QAbstractItemModel* itemModel = selectionModel->model();
 257
 258     const QModelIndex topLeft = itemModel->index(0, 0);
 259     const QModelIndex bottomRight = itemModel->index(itemModel->rowCount() - 1,
 260                                                      itemModel->columnCount() - 1);
 261
 262     QItemSelection selection(topLeft, bottomRight);
 263     selectionModel->select(selection, QItemSelectionModel::Toggle);
 264 }
 265
 266 bool DolphinView::hasSelection() const
 267 {
 268     return itemView()->selectionModel()->hasSelection();
 269 }
 270
 271 void DolphinView::clearSelection()
 272 {
 273     itemView()->selectionModel()->clear();
 274 }
 275
 276 QList<KFileItem> DolphinView::selectedItems() const
 277 {
 278     const QAbstractItemView* view = itemView();
 279
 280     // Our view has a selection, we will map them back to the DolphinModel
 281     // and then fill the KFileItemList.
 282     Q_ASSERT((view != 0) && (view->selectionModel() != 0));
 283
 284     const QItemSelection selection = m_proxyModel->mapSelectionToSource(view->selectionModel()->selection());
 285     QList<KFileItem> itemList;
 286
 287     const QModelIndexList indexList = selection.indexes();
 288     foreach (QModelIndex index, indexList) {
 289         KFileItem item = m_dolphinModel->itemForIndex(index);
 290         if (!item.isNull()) {
 291             itemList.append(item);
 292         }
 293     }
 294
 295     return itemList;
 296 }
 297
 298 KUrl::List DolphinView::selectedUrls() const
 299 {
 300     KUrl::List urls;
 301     const QList<KFileItem> list = selectedItems();
 302     for ( QList<KFileItem>::const_iterator it = list.begin(), end = list.end();
 303           it != end; ++it ) {
 304         urls.append((*it).url());
 305     }
 306     return urls;
 307 }
 308
 309 KFileItem DolphinView::fileItem(const QModelIndex& index) const
 310 {
 311     const QModelIndex dolphinModelIndex = m_proxyModel->mapToSource(index);
 312     return m_dolphinModel->itemForIndex(dolphinModelIndex);
 313 }
 314
 315 void DolphinView::setContentsPosition(int x, int y)
 316 {
 317     QAbstractItemView* view = itemView();
 318
 319     // the ColumnView takes care itself for the horizontal scrolling
 320     if (!isColumnViewActive()) {
 321         view->horizontalScrollBar()->setValue(x);
 322     }
 323     view->verticalScrollBar()->setValue(y);
 324
 325     m_loadingDirectory = false;
 326 }
 327
 328 QPoint DolphinView::contentsPosition() const
 329 {
 330     const int x = itemView()->horizontalScrollBar()->value();
 331     const int y = itemView()->verticalScrollBar()->value();
 332     return QPoint(x, y);
 333 }
 334
 335 void DolphinView::zoomIn()
 336 {
 337     m_controller->triggerZoomIn();
 338 }
 339
 340 void DolphinView::zoomOut()
 341 {
 342     m_controller->triggerZoomOut();
 343 }
 344
 345 bool DolphinView::isZoomInPossible() const
 346 {
 347     return m_controller->isZoomInPossible();
 348 }
 349
 350 bool DolphinView::isZoomOutPossible() const
 351 {
 352     return m_controller->isZoomOutPossible();
 353 }
 354
 355 void DolphinView::setSorting(Sorting sorting)
 356 {
 357     if (sorting != this->sorting()) {
 358         updateSorting(sorting);
 359     }
 360 }
 361
 362 DolphinView::Sorting DolphinView::sorting() const
 363 {
 364     return m_proxyModel->sorting();
 365 }
 366
 367 void DolphinView::setSortOrder(Qt::SortOrder order)
 368 {
 369     if (sortOrder() != order) {
 370         updateSortOrder(order);
 371     }
 372 }
 373
 374 Qt::SortOrder DolphinView::sortOrder() const
 375 {
 376     return m_proxyModel->sortOrder();
 377 }
 378
 379 void DolphinView::setAdditionalInfo(KFileItemDelegate::AdditionalInformation info)
 380 {
 381     const KUrl viewPropsUrl = viewPropertiesUrl();
 382     ViewProperties props(viewPropsUrl);
 383     props.setAdditionalInfo(info);
 384
 385     m_controller->setShowAdditionalInfo(info != KFileItemDelegate::NoInformation);
 386     m_fileItemDelegate->setAdditionalInformation(info);
 387
 388     emit additionalInfoChanged(info);
 389     startDirLister(viewPropsUrl, true);
 390 }
 391
 392 KFileItemDelegate::AdditionalInformation DolphinView::additionalInfo() const
 393 {
 394     return m_fileItemDelegate->additionalInformation();
 395 }
 396
 397 void DolphinView::reload()
 398 {
 399     setUrl(url());
 400     startDirLister(url(), true);
 401 }
 402
 403 void DolphinView::refresh()
 404 {
 405     createView();
 406     applyViewProperties(m_controller->url());
 407     reload();
 408     updateViewportColor();
 409 }
 410
 411 void DolphinView::setUrl(const KUrl& url)
 412 {
 413     if (m_controller->url() == url) {
 414         return;
 415     }
 416
 417     m_controller->setUrl(url); // emits urlChanged, which we forward
 418
 419     applyViewProperties(url);
 420
 421     startDirLister(url);
 422     itemView()->setFocus();
 423 }
 424
 425 void DolphinView::mouseReleaseEvent(QMouseEvent* event)
 426 {
 427     QWidget::mouseReleaseEvent(event);
 428     setActive(true);
 429 }
 430 void DolphinView::activate()
 431 {
 432     setActive(true);
 433 }
 434
 435 void DolphinView::triggerItem(const QModelIndex& index)
 436 {
 437     Q_ASSERT(index.isValid());
 438
 439     const Qt::KeyboardModifiers modifier = QApplication::keyboardModifiers();
 440     if ((modifier & Qt::ShiftModifier) || (modifier & Qt::ControlModifier)) {
 441         // items are selected by the user, hence don't trigger the
 442         // item specified by 'index'
 443         return;
 444     }
 445
 446     const KFileItem item = m_dolphinModel->itemForIndex(m_proxyModel->mapToSource(index));
 447
 448     if (item.isNull()) {
 449         return;
 450     }
 451
 452     emit itemTriggered(item); // caught by DolphinViewContainer or DolphinPart
 453 }
 454
 455 void DolphinView::generatePreviews(const QList<KFileItem>& items)
 456 {
 457     if (m_controller->showPreview()) {
 458         KIO::PreviewJob* job = KIO::filePreview(items, 128);
 459         connect(job, SIGNAL(gotPreview(const KFileItem&, const QPixmap&)),
 460                 this, SLOT(showPreview(const KFileItem&, const QPixmap&)));
 461     }
 462 }
 463
 464 void DolphinView::showPreview(const KFileItem& item, const QPixmap& pixmap)
 465 {
 466     Q_ASSERT(!item.isNull());
 467     if (item.url().directory() != m_dirLister->url().path()) {
 468         // the preview job is still working on items of an older URL, hence
 469         // the item is not part of the directory model anymore
 470         return;
 471     }
 472
 473     const QModelIndex idx = m_dolphinModel->indexForItem(item);
 474     if (idx.isValid() && (idx.column() == 0)) {
 475         const QMimeData* mimeData = QApplication::clipboard()->mimeData();
 476         if (KonqMimeData::decodeIsCutSelection(mimeData) && isCutItem(item)) {
 477             KIconEffect iconEffect;
 478             const QPixmap cutPixmap = iconEffect.apply(pixmap, K3Icon::Desktop, K3Icon::DisabledState);
 479             m_dolphinModel->setData(idx, QIcon(cutPixmap), Qt::DecorationRole);
 480         } else {
 481             m_dolphinModel->setData(idx, QIcon(pixmap), Qt::DecorationRole);
 482         }
 483     }
 484 }
 485
 486 void DolphinView::emitSelectionChangedSignal()
 487 {
 488     emit selectionChanged(DolphinView::selectedItems());
 489 }
 490
 491 void DolphinView::startDirLister(const KUrl& url, bool reload)
 492 {
 493     if (!url.isValid()) {
 494         const QString location(url.pathOrUrl());
 495         if (location.isEmpty()) {
 496             emit errorMessage(i18nc("@info:status", "The location is empty."));
 497         } else {
 498             emit errorMessage(i18nc("@info:status", "The location '%1' is invalid.", location));
 499         }
 500         return;
 501     }
 502
 503     m_cutItemsCache.clear();
 504     m_loadingDirectory = true;
 505
 506     m_dirLister->stop();
 507
 508     bool keepOldDirs = isColumnViewActive() && !m_initializeColumnView;
 509     m_initializeColumnView = false;
 510
 511     if (keepOldDirs) {
 512         // keeping old directories is only necessary for hierarchical views
 513         // like the column view
 514         if (reload) {
 515             // for the column view it is not enough to reload the directory lister,
 516             // so this task is delegated to the column view directly
 517             m_columnView->reload();
 518         } else if (m_dirLister->directories().contains(url)) {
 519             // The dir lister contains the directory already, so
 520             // KDirLister::openUrl() may not get invoked twice.
 521             m_dirLister->updateDirectory(url);
 522         } else {
 523             const KUrl& dirListerUrl = m_dirLister->url();
 524             if ((dirListerUrl == url) || !m_dirLister->url().isParentOf(url)) {
 525                 // The current URL is not a child of the dir lister
 526                 // URL. This may happen when e. g. a place has been selected
 527                 // and hence the view must be reset.
 528                 keepOldDirs = false;
 529             }
 530             m_dirLister->openUrl(url, keepOldDirs, false);
 531         }
 532     } else {
 533         m_dirLister->openUrl(url, false, reload);
 534     }
 535 }
 536
 537 KUrl DolphinView::viewPropertiesUrl() const
 538 {
 539     if (isColumnViewActive()) {
 540         return m_dirLister->url();
 541     }
 542
 543     return url();
 544 }
 545
 546 void DolphinView::applyViewProperties(const KUrl& url)
 547 {
 548     if (isColumnViewActive() && m_dirLister->url().isParentOf(url)) {
 549         // The column view is active, hence don't apply the view properties
 550         // of sub directories (represented by columns) to the view. The
 551         // view always represents the properties of the first column.
 552         return;
 553     }
 554
 555     const ViewProperties props(url);
 556
 557     const Mode mode = props.viewMode();
 558     if (m_mode != mode) {
 559         m_mode = mode;
 560         createView();
 561         emit modeChanged();
 562
 563         if (m_mode == ColumnView) {
 564             // The mode has been changed to the Column View. When starting the dir
 565             // lister with DolphinView::startDirLister() it is important to give a
 566             // hint that the dir lister may not keep the current directory
 567             // although this is the default for showing a hierarchy.
 568             m_initializeColumnView = true;
 569         }
 570     }
 571     if (itemView() == 0) {
 572         createView();
 573     }
 574     Q_ASSERT(itemView() != 0);
 575     Q_ASSERT(m_fileItemDelegate != 0);
 576
 577     const bool showHiddenFiles = props.showHiddenFiles();
 578     if (showHiddenFiles != m_dirLister->showingDotFiles()) {
 579         m_dirLister->setShowingDotFiles(showHiddenFiles);
 580         emit showHiddenFilesChanged();
 581     }
 582
 583     const bool categorized = props.categorizedSorting();
 584     if (categorized != categorizedSorting()) {
 585         m_proxyModel->setCategorizedModel(categorized);
 586         emit categorizedSortingChanged();
 587     }
 588
 589     const DolphinView::Sorting sorting = props.sorting();
 590     if (sorting != m_proxyModel->sorting()) {
 591         m_proxyModel->setSorting(sorting);
 592         emit sortingChanged(sorting);
 593     }
 594
 595     const Qt::SortOrder sortOrder = props.sortOrder();
 596     if (sortOrder != m_proxyModel->sortOrder()) {
 597         m_proxyModel->setSortOrder(sortOrder);
 598         emit sortOrderChanged(sortOrder);
 599     }
 600
 601     KFileItemDelegate::AdditionalInformation info = props.additionalInfo();
 602     if (info != m_fileItemDelegate->additionalInformation()) {
 603         m_controller->setShowAdditionalInfo(info != KFileItemDelegate::NoInformation);
 604         m_fileItemDelegate->setAdditionalInformation(info);
 605         emit additionalInfoChanged(info);
 606     }
 607
 608     const bool showPreview = props.showPreview();
 609     if (showPreview != m_controller->showPreview()) {
 610         m_controller->setShowPreview(showPreview);
 611         emit showPreviewChanged();
 612     }
 613 }
 614
 615 void DolphinView::changeSelection(const QList<KFileItem>& selection)
 616 {
 617     clearSelection();
 618     if (selection.isEmpty()) {
 619         return;
 620     }
 621     const KUrl& baseUrl = url();
 622     KUrl url;
 623     QItemSelection new_selection;
 624     foreach(const KFileItem& item, selection) {
 625         url = item.url().upUrl();
 626         if (baseUrl.equals(url, KUrl::CompareWithoutTrailingSlash)) {
 627             QModelIndex index = m_proxyModel->mapFromSource(m_dolphinModel->indexForItem(item));
 628             new_selection.select(index, index);
 629         }
 630     }
 631     itemView()->selectionModel()->select(new_selection,
 632                                          QItemSelectionModel::ClearAndSelect
 633                                          | QItemSelectionModel::Current);
 634 }
 635
 636 void DolphinView::openContextMenu(const QPoint& pos)
 637 {
 638     KFileItem item;
 639
 640     const QModelIndex index = itemView()->indexAt(pos);
 641     if (isValidNameIndex(index)) {
 642         item = fileItem(index);
 643     }
 644
 645     emit requestContextMenu(item, url());
 646 }
 647
 648 void DolphinView::dropUrls(const KUrl::List& urls,
 649                            const KUrl& destPath,
 650                            const QModelIndex& destIndex,
 651                            QWidget* source)
 652 {
 653     KFileItem directory;
 654     if (isValidNameIndex(destIndex)) {
 655         KFileItem item = fileItem(destIndex);
 656         Q_ASSERT(!item.isNull());
 657         if (item.isDir()) {
 658             // the URLs are dropped above a directory
 659             directory = item;
 660         }
 661     }
 662
 663     if ((directory.isNull()) && (source == itemView())) {
 664         // The dropping is done into the same viewport where
 665         // the dragging has been started. Just ignore this...
 666         return;
 667     }
 668
 669     const KUrl& destination = (directory.isNull()) ?
 670                               destPath : directory.url();
 671     dropUrls(urls, destination);
 672 }
 673
 674 void DolphinView::dropUrls(const KUrl::List& urls,
 675                            const KUrl& destination)
 676 {
 677     emit urlsDropped(urls, destination);
 678 }
 679
 680 void DolphinView::updateSorting(DolphinView::Sorting sorting)
 681 {
 682     ViewProperties props(viewPropertiesUrl());
 683     props.setSorting(sorting);
 684
 685     m_proxyModel->setSorting(sorting);
 686
 687     emit sortingChanged(sorting);
 688 }
 689
 690 void DolphinView::updateSortOrder(Qt::SortOrder order)
 691 {
 692     ViewProperties props(viewPropertiesUrl());
 693     props.setSortOrder(order);
 694
 695     m_proxyModel->setSortOrder(order);
 696
 697     emit sortOrderChanged(order);
 698 }
 699
 700 void DolphinView::emitContentsMoved()
 701 {
 702     // only emit the contents moved signal if:
 703     // - no directory loading is ongoing (this would reset the contents position
 704     //   always to (0, 0))
 705     // - if the Column View is active: the column view does an automatic
 706     //   positioning during the loading operation, which must be remembered
 707     if (!m_loadingDirectory || isColumnViewActive()) {
 708         const QPoint pos(contentsPosition());
 709         emit contentsMoved(pos.x(), pos.y());
 710     }
 711 }
 712
 713 void DolphinView::updateCutItems()
 714 {
 715     // restore the icons of all previously selected items to the
 716     // original state...
 717     QList<CutItem>::const_iterator it = m_cutItemsCache.begin();
 718     QList<CutItem>::const_iterator end = m_cutItemsCache.end();
 719     while (it != end) {
 720         const QModelIndex index = m_dolphinModel->indexForUrl((*it).url);
 721         if (index.isValid()) {
 722             m_dolphinModel->setData(index, QIcon((*it).pixmap), Qt::DecorationRole);
 723         }
 724         ++it;
 725     }
 726     m_cutItemsCache.clear();
 727
 728     // ... and apply an item effect to all currently cut items
 729     applyCutItemEffect();
 730 }
 731
 732 void DolphinView::showHoverInformation(const QModelIndex& index)
 733 {
 734     if (hasSelection()) {
 735         return;
 736     }
 737
 738     const KFileItem item = fileItem(index);
 739     if (!item.isNull()) {
 740         emit requestItemInfo(item);
 741     }
 742 }
 743
 744 void DolphinView::clearHoverInformation()
 745 {
 746     emit requestItemInfo(KFileItem());
 747 }
 748
 749
 750 void DolphinView::createView()
 751 {
 752     // delete current view
 753     QAbstractItemView* view = itemView();
 754     if (view != 0) {
 755         m_topLayout->removeWidget(view);
 756         view->close();
 757         view->deleteLater();
 758         view = 0;
 759         m_iconsView = 0;
 760         m_detailsView = 0;
 761         m_columnView = 0;
 762         m_fileItemDelegate = 0;
 763     }
 764
 765     Q_ASSERT(m_iconsView == 0);
 766     Q_ASSERT(m_detailsView == 0);
 767     Q_ASSERT(m_columnView == 0);
 768
 769     // ... and recreate it representing the current mode
 770     switch (m_mode) {
 771     case IconsView:
 772         m_iconsView = new DolphinIconsView(this, m_controller);
 773         m_iconsView->setCategoryDrawer(new DolphinCategoryDrawer());
 774         view = m_iconsView;
 775         break;
 776
 777     case DetailsView:
 778         m_detailsView = new DolphinDetailsView(this, m_controller);
 779         view = m_detailsView;
 780         break;
 781
 782     case ColumnView:
 783         m_columnView = new DolphinColumnView(this, m_controller);
 784         view = m_columnView;
 785         break;
 786     }
 787
 788     Q_ASSERT(view != 0);
 789
 790     m_fileItemDelegate = new KFileItemDelegate(view);
 791     view->setItemDelegate(m_fileItemDelegate);
 792
 793     view->setModel(m_proxyModel);
 794     view->setSelectionMode(QAbstractItemView::ExtendedSelection);
 795
 796     new KMimeTypeResolver(view, m_dolphinModel);
 797     m_topLayout->insertWidget(1, view);
 798
 799     connect(view->selectionModel(), SIGNAL(selectionChanged(const QItemSelection&, const QItemSelection&)),
 800             this, SLOT(emitSelectionChangedSignal()));
 801     connect(view->verticalScrollBar(), SIGNAL(valueChanged(int)),
 802             this, SLOT(emitContentsMoved()));
 803     connect(view->horizontalScrollBar(), SIGNAL(valueChanged(int)),
 804             this, SLOT(emitContentsMoved()));
 805     view->setFocus();
 806 }
 807
 808 QAbstractItemView* DolphinView::itemView() const
 809 {
 810     if (m_detailsView != 0) {
 811         return m_detailsView;
 812     } else if (m_columnView != 0) {
 813         return m_columnView;
 814     }
 815
 816     return m_iconsView;
 817 }
 818
 819 bool DolphinView::isValidNameIndex(const QModelIndex& index) const
 820 {
 821     return index.isValid() && (index.column() == DolphinModel::Name);
 822 }
 823
 824 bool DolphinView::isCutItem(const KFileItem& item) const
 825 {
 826     const QMimeData* mimeData = QApplication::clipboard()->mimeData();
 827     const KUrl::List cutUrls = KUrl::List::fromMimeData(mimeData);
 828
 829     const KUrl& itemUrl = item.url();
 830     KUrl::List::const_iterator it = cutUrls.begin();
 831     const KUrl::List::const_iterator end = cutUrls.end();
 832     while (it != end) {
 833         if (*it == itemUrl) {
 834             return true;
 835         }
 836         ++it;
 837     }
 838
 839     return false;
 840 }
 841
 842 void DolphinView::applyCutItemEffect()
 843 {
 844     const QMimeData* mimeData = QApplication::clipboard()->mimeData();
 845     if (!KonqMimeData::decodeIsCutSelection(mimeData)) {
 846         return;
 847     }
 848
 849     KFileItemList items(m_dirLister->items());
 850     KFileItemList::const_iterator it = items.begin();
 851     const KFileItemList::const_iterator end = items.end();
 852     while (it != end) {
 853         KFileItem* item = *it;
 854         if (isCutItem(*item)) {
 855             const QModelIndex index = m_dolphinModel->indexForItem(*item);
 856             // Huh? the item is already known
 857             //const KFileItem item = m_dolphinModel->itemForIndex(index);
 858             const QVariant value = m_dolphinModel->data(index, Qt::DecorationRole);
 859             if (value.type() == QVariant::Icon) {
 860                 const QIcon icon(qvariant_cast<QIcon>(value));
 861                 QPixmap pixmap = icon.pixmap(128, 128);
 862
 863                 // remember current pixmap for the item to be able
 864                 // to restore it when other items get cut
 865                 CutItem cutItem;
 866                 cutItem.url = item->url();
 867                 cutItem.pixmap = pixmap;
 868                 m_cutItemsCache.append(cutItem);
 869
 870                 // apply icon effect to the cut item
 871                 KIconEffect iconEffect;
 872                 pixmap = iconEffect.apply(pixmap, K3Icon::Desktop, K3Icon::DisabledState);
 873                 m_dolphinModel->setData(index, QIcon(pixmap), Qt::DecorationRole);
 874             }
 875         }
 876         ++it;
 877     }
 878 }
 879
 880 void DolphinView::updateViewportColor()
 881 {
 882     QColor color = KColorScheme(QPalette::Active, KColorScheme::View).background().color();
 883     if (m_active) {
 884         emit urlChanged(url()); // Hmm, this is a hack; the url hasn't really changed.
 885         emit selectionChanged(selectedItems());
 886     } else {
 887         color.setAlpha(0);
 888     }
 889
 890     QWidget* viewport = itemView()->viewport();
 891     QPalette palette;
 892     palette.setColor(viewport->backgroundRole(), color);
 893     viewport->setPalette(palette);
 894 }
 895
 896 #include "dolphinview.moc"