src/views/dolphincolumnview.cpp

   1 /***************************************************************************
   2  *   Copyright (C) 2007-2009 by Peter Penz <peter.penz@gmx.at>             *
   3  *                                                                         *
   4  *   This program is free software; you can redistribute it and/or modify  *
   5  *   it under the terms of the GNU General Public License as published by  *
   6  *   the Free Software Foundation; either version 2 of the License, or     *
   7  *   (at your option) any later version.                                   *
   8  *                                                                         *
   9  *   This program is distributed in the hope that it will be useful,       *
  10  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  11  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  12  *   GNU General Public License for more details.                          *
  13  *                                                                         *
  14  *   You should have received a copy of the GNU General Public License     *
  15  *   along with this program; if not, write to the                         *
  16  *   Free Software Foundation, Inc.,                                       *
  17  *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA            *
  18  ***************************************************************************/
  19
  20 #include "dolphincolumnview.h"
  21
  22 #include "dolphinmodel.h"
  23 #include "dolphincolumnviewcontainer.h"
  24 #include "dolphinviewcontroller.h"
  25 #include "dolphindirlister.h"
  26 #include "dolphinfileitemdelegate.h"
  27 #include "dolphinsortfilterproxymodel.h"
  28 #include "settings/dolphinsettings.h"
  29 #include "dolphinviewautoscroller.h"
  30 #include "dolphin_columnmodesettings.h"
  31 #include "dolphin_generalsettings.h"
  32 #include "draganddrophelper.h"
  33 #include "folderexpander.h"
  34 #include "tooltips/tooltipmanager.h"
  35 #include "viewextensionsfactory.h"
  36 #include "viewmodecontroller.h"
  37 #include "zoomlevelinfo.h"
  38
  39 #include <KColorScheme>
  40 #include <KDirLister>
  41 #include <KFileItem>
  42 #include <KIO/PreviewJob>
  43 #include <KIcon>
  44 #include <KIconEffect>
  45 #include <KJob>
  46 #include <KLocale>
  47 #include <konqmimedata.h>
  48
  49 #include <QApplication>
  50 #include <QClipboard>
  51 #include <QHeaderView>
  52 #include <QLabel>
  53 #include <QPainter>
  54 #include <QPoint>
  55 #include <QScrollBar>
  56
  57 DolphinColumnView::DolphinColumnView(QWidget* parent,
  58                                      DolphinColumnViewContainer* container,
  59                                      const KUrl& url) :
  60     DolphinTreeView(parent),
  61     m_active(false),
  62     m_container(container),
  63     m_extensionsFactory(0),
  64     m_url(url),
  65     m_childUrl(),
  66     m_font(),
  67     m_decorationSize(),
  68     m_dirLister(0),
  69     m_dolphinModel(0),
  70     m_proxyModel(0),
  71     m_resizeWidget(0),
  72     m_resizeXOrigin(-1)
  73 {
  74     setMouseTracking(true);
  75     setAcceptDrops(true);
  76     setUniformRowHeights(true);
  77     setSelectionBehavior(SelectItems);
  78     setSelectionMode(QAbstractItemView::ExtendedSelection);
  79     setDragDropMode(QAbstractItemView::DragDrop);
  80     setDropIndicatorShown(false);
  81     setRootIsDecorated(false);
  82     setItemsExpandable(false);
  83     setEditTriggers(QAbstractItemView::NoEditTriggers);
  84     setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOn);
  85
  86     m_resizeWidget = new QLabel(this);
  87     m_resizeWidget->setPixmap(KIcon("transform-move").pixmap(KIconLoader::SizeSmall));
  88     m_resizeWidget->setToolTip(i18nc("@info:tooltip", "Resize column"));
  89     setCornerWidget(m_resizeWidget);
  90     m_resizeWidget->installEventFilter(this);
  91
  92     const ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
  93     Q_ASSERT(settings != 0);
  94
  95     if (settings->useSystemFont()) {
  96         m_font = KGlobalSettings::generalFont();
  97     } else {
  98         m_font = QFont(settings->fontFamily(),
  99                        qRound(settings->fontSize()),
 100                        settings->fontWeight(),
 101                        settings->italicFont());
 102         m_font.setPointSizeF(settings->fontSize());
 103     }
 104
 105     setMinimumWidth(settings->fontSize() * 10);
 106     setMaximumWidth(settings->columnWidth());
 107
 108     connect(this, SIGNAL(viewportEntered()),
 109             m_container->m_dolphinViewController, SLOT(emitViewportEntered()));
 110     connect(this, SIGNAL(entered(const QModelIndex&)),
 111             this, SLOT(slotEntered(const QModelIndex&)));
 112
 113     const DolphinView* dolphinView = m_container->m_dolphinViewController->view();
 114     connect(dolphinView, SIGNAL(showPreviewChanged()),
 115             this, SLOT(slotShowPreviewChanged()));
 116
 117     m_dirLister = new DolphinDirLister();
 118     m_dirLister->setAutoUpdate(true);
 119     m_dirLister->setMainWindow(window());
 120     m_dirLister->setDelayedMimeTypes(true);
 121     const bool showHiddenFiles = m_container->m_dolphinViewController->view()->showHiddenFiles();
 122     m_dirLister->setShowingDotFiles(showHiddenFiles);
 123     connect(m_dirLister, SIGNAL(completed()), this, SLOT(slotDirListerCompleted()));
 124
 125     m_dolphinModel = new DolphinModel(this);
 126     m_dolphinModel->setDirLister(m_dirLister);
 127     m_dolphinModel->setDropsAllowed(DolphinModel::DropOnDirectory);
 128
 129     m_proxyModel = new DolphinSortFilterProxyModel(this);
 130     m_proxyModel->setSourceModel(m_dolphinModel);
 131     m_proxyModel->setFilterCaseSensitivity(Qt::CaseInsensitive);
 132
 133     m_proxyModel->setSorting(dolphinView->sorting());
 134     m_proxyModel->setSortOrder(dolphinView->sortOrder());
 135     m_proxyModel->setSortFoldersFirst(dolphinView->sortFoldersFirst());
 136
 137     setModel(m_proxyModel);
 138
 139     connect(KGlobalSettings::self(), SIGNAL(kdisplayFontChanged()),
 140             this, SLOT(updateFont()));
 141
 142     const ViewModeController* viewModeController = m_container->m_viewModeController;
 143     connect(viewModeController, SIGNAL(zoomLevelChanged(int)),
 144             this, SLOT(setZoomLevel(int)));
 145     const QString nameFilter = viewModeController->nameFilter();
 146     if (!nameFilter.isEmpty()) {
 147         m_proxyModel->setFilterFixedString(nameFilter);
 148     }
 149
 150     updateDecorationSize(dolphinView->showPreview());
 151     updateBackground();
 152
 153     DolphinViewController* dolphinViewController = m_container->m_dolphinViewController;
 154     m_extensionsFactory = new ViewExtensionsFactory(this, dolphinViewController, viewModeController);
 155     m_extensionsFactory->fileItemDelegate()->setMinimizedNameColumn(true);
 156
 157     m_dirLister->openUrl(url, KDirLister::NoFlags);
 158 }
 159
 160 DolphinColumnView::~DolphinColumnView()
 161 {
 162     delete m_proxyModel;
 163     m_proxyModel = 0;
 164     delete m_dolphinModel;
 165     m_dolphinModel = 0;
 166     m_dirLister = 0; // deleted by m_dolphinModel
 167 }
 168
 169
 170 void DolphinColumnView::setActive(bool active)
 171 {
 172     if (m_active != active) {
 173         m_active = active;
 174
 175         if (active) {
 176             activate();
 177         } else {
 178             deactivate();
 179         }
 180     }
 181 }
 182
 183 bool DolphinColumnView::isActive() const
 184 {
 185     return m_active;
 186 }
 187
 188 void DolphinColumnView::setChildUrl(const KUrl& url)
 189 {
 190     m_childUrl = url;
 191 }
 192
 193 KUrl DolphinColumnView::childUrl() const
 194 {
 195     return m_childUrl;
 196 }
 197
 198 void DolphinColumnView::setUrl(const KUrl& url)
 199 {
 200     if (url != m_url) {
 201         m_url = url;
 202         m_dirLister->openUrl(url, KDirLister::NoFlags);
 203     }
 204 }
 205
 206 KUrl DolphinColumnView::url() const
 207 {
 208     return m_url;
 209 }
 210
 211 void DolphinColumnView::updateBackground()
 212 {
 213     // TODO: The alpha-value 150 is copied from DolphinView::setActive(). When
 214     // cleaning up the cut-indication of DolphinColumnView with the code from
 215     // DolphinView a common helper-class should be available which can be shared
 216     // by all view implementations -> no hardcoded value anymore
 217     const QPalette::ColorRole role = viewport()->backgroundRole();
 218     QColor color = viewport()->palette().color(role);
 219     color.setAlpha((m_active && m_container->m_active) ? 255 : 150);
 220
 221     QPalette palette = viewport()->palette();
 222     palette.setColor(role, color);
 223     viewport()->setPalette(palette);
 224
 225     update();
 226 }
 227
 228 KFileItem DolphinColumnView::itemAt(const QPoint& pos) const
 229 {
 230     KFileItem item;
 231     const QModelIndex index = indexAt(pos);
 232     if (index.isValid() && (index.column() == DolphinModel::Name)) {
 233         const QModelIndex dolphinModelIndex = m_proxyModel->mapToSource(index);
 234         item = m_dolphinModel->itemForIndex(dolphinModelIndex);
 235     }
 236     return item;
 237 }
 238
 239 void DolphinColumnView::setSelectionModel(QItemSelectionModel* model)
 240 {
 241     // If a change of the selection is done although the view is not active
 242     // (e. g. by the selection markers), the column must be activated. This
 243     // is done by listening to the current selectionChanged() signal.
 244     if (selectionModel() != 0) {
 245         disconnect(selectionModel(), SIGNAL(selectionChanged(QItemSelection, QItemSelection)),
 246                    this, SLOT(requestActivation()));
 247     }
 248
 249     DolphinTreeView::setSelectionModel(model);
 250
 251     connect(selectionModel(), SIGNAL(selectionChanged(QItemSelection, QItemSelection)),
 252             this, SLOT(requestActivation()));
 253 }
 254
 255 QStyleOptionViewItem DolphinColumnView::viewOptions() const
 256 {
 257     QStyleOptionViewItem viewOptions = DolphinTreeView::viewOptions();
 258     viewOptions.font = m_font;
 259     viewOptions.fontMetrics = QFontMetrics(m_font);
 260     viewOptions.decorationSize = m_decorationSize;
 261     viewOptions.showDecorationSelected = true;
 262     return viewOptions;
 263 }
 264
 265 bool DolphinColumnView::event(QEvent* event)
 266 {
 267     if (event->type() == QEvent::Polish) {
 268         // Hide all columns except of the 'Name' column
 269         for (int i = DolphinModel::Name + 1; i < DolphinModel::ExtraColumnCount; ++i) {
 270             hideColumn(i);
 271         }
 272         header()->hide();
 273     }
 274
 275     return DolphinTreeView::event(event);
 276 }
 277
 278 void DolphinColumnView::startDrag(Qt::DropActions supportedActions)
 279 {
 280     DragAndDropHelper::instance().startDrag(this, supportedActions, m_container->m_dolphinViewController);
 281     DolphinTreeView::startDrag(supportedActions);
 282 }
 283
 284 void DolphinColumnView::dragEnterEvent(QDragEnterEvent* event)
 285 {
 286     event->acceptProposedAction();
 287     requestActivation();
 288     DolphinTreeView::dragEnterEvent(event);
 289 }
 290
 291 void DolphinColumnView::dragMoveEvent(QDragMoveEvent* event)
 292 {
 293     DolphinTreeView::dragMoveEvent(event);
 294     event->acceptProposedAction();
 295 }
 296
 297 void DolphinColumnView::dropEvent(QDropEvent* event)
 298 {
 299     const QModelIndex index = indexAt(event->pos());
 300     m_container->m_dolphinViewController->setItemView(this);
 301     const QModelIndex dolphinModelIndex = m_proxyModel->mapToSource(index);
 302     const KFileItem item = m_dolphinModel->itemForIndex(dolphinModelIndex);
 303     m_container->m_dolphinViewController->indicateDroppedUrls(item, event);
 304     DolphinTreeView::dropEvent(event);
 305 }
 306
 307 void DolphinColumnView::paintEvent(QPaintEvent* event)
 308 {
 309     if (!m_childUrl.isEmpty()) {
 310         // Indicate the shown URL of the next column by highlighting the shown folder item
 311         const QModelIndex dirIndex = m_dolphinModel->indexForUrl(m_childUrl);
 312         const QModelIndex proxyIndex = m_proxyModel->mapFromSource(dirIndex);
 313         if (proxyIndex.isValid() && !selectionModel()->isSelected(proxyIndex)) {
 314             QPainter painter(viewport());
 315
 316             QStyleOptionViewItemV4 option;
 317             option.initFrom(this);
 318             option.rect = visualRect(proxyIndex);
 319             option.state = QStyle::State_Enabled | QStyle::State_HasFocus;
 320             option.viewItemPosition = QStyleOptionViewItemV4::OnlyOne;
 321             style()->drawPrimitive(QStyle::PE_FrameFocusRect, &option, &painter, this);
 322         }
 323     }
 324
 325     DolphinTreeView::paintEvent(event);
 326 }
 327
 328 void DolphinColumnView::mousePressEvent(QMouseEvent* event)
 329 {
 330     requestActivation();
 331     if (!indexAt(event->pos()).isValid() && (QApplication::mouseButtons() & Qt::MidButton)) {
 332         m_container->m_dolphinViewController->replaceUrlByClipboard();
 333     }
 334
 335     DolphinTreeView::mousePressEvent(event);
 336 }
 337
 338 void DolphinColumnView::keyPressEvent(QKeyEvent* event)
 339 {
 340     DolphinTreeView::keyPressEvent(event);
 341
 342     DolphinViewController* controller = m_container->m_dolphinViewController;
 343     controller->handleKeyPressEvent(event);
 344     switch (event->key()) {
 345     case Qt::Key_Right: {
 346         // Special key handling for the column: A Key_Right should
 347         // open a new column for the currently selected folder.
 348         const QModelIndex dolphinModelIndex = m_proxyModel->mapToSource(currentIndex());
 349         const KFileItem item = m_dolphinModel->itemForIndex(dolphinModelIndex);
 350         if (!item.isNull() && item.isDir()) {
 351             controller->emitItemTriggered(item);
 352         }
 353         break;
 354     }
 355
 356     case Qt::Key_Escape:
 357         selectionModel()->setCurrentIndex(selectionModel()->currentIndex(),
 358                                           QItemSelectionModel::Current |
 359                                           QItemSelectionModel::Clear);
 360         break;
 361
 362     default:
 363         break;
 364     }
 365 }
 366
 367 void DolphinColumnView::contextMenuEvent(QContextMenuEvent* event)
 368 {
 369     requestActivation();
 370     DolphinTreeView::contextMenuEvent(event);
 371     m_container->m_dolphinViewController->triggerContextMenuRequest(event->pos());
 372 }
 373
 374 void DolphinColumnView::wheelEvent(QWheelEvent* event)
 375 {
 376     const int step = m_decorationSize.height();
 377     verticalScrollBar()->setSingleStep(step);
 378     DolphinTreeView::wheelEvent(event);
 379 }
 380
 381 void DolphinColumnView::leaveEvent(QEvent* event)
 382 {
 383     DolphinTreeView::leaveEvent(event);
 384     // if the mouse is above an item and moved very fast outside the widget,
 385     // no viewportEntered() signal might be emitted although the mouse has been moved
 386     // above the viewport
 387     m_container->m_dolphinViewController->emitViewportEntered();
 388 }
 389
 390 void DolphinColumnView::currentChanged(const QModelIndex& current, const QModelIndex& previous)
 391 {
 392     DolphinTreeView::currentChanged(current, previous);
 393     m_extensionsFactory->handleCurrentIndexChange(current, previous);
 394 }
 395
 396 QRect DolphinColumnView::visualRect(const QModelIndex& index) const
 397 {
 398     QRect rect = DolphinTreeView::visualRect(index);
 399
 400     const QModelIndex dolphinModelIndex = m_proxyModel->mapToSource(index);
 401     const KFileItem item = m_dolphinModel->itemForIndex(dolphinModelIndex);
 402     if (!item.isNull()) {
 403         const int width = DolphinFileItemDelegate::nameColumnWidth(item.text(), viewOptions());
 404         rect.setWidth(width);
 405     }
 406
 407     return rect;
 408 }
 409
 410 bool DolphinColumnView::acceptsDrop(const QModelIndex& index) const
 411 {
 412     if (index.isValid() && (index.column() == DolphinModel::Name)) {
 413         // Accept drops above directories
 414         const QModelIndex dolphinModelIndex = m_proxyModel->mapToSource(index);
 415         const KFileItem item = m_dolphinModel->itemForIndex(dolphinModelIndex);
 416         return !item.isNull() && item.isDir();
 417     }
 418
 419     return false;
 420 }
 421
 422 bool DolphinColumnView::eventFilter(QObject* watched, QEvent* event)
 423 {
 424     if (watched == m_resizeWidget) {
 425         switch (event->type()) {
 426         case QEvent::MouseButtonPress: {
 427             // Initiate the resizing of the column
 428             QMouseEvent* mouseEvent = static_cast<QMouseEvent*>(event);
 429             m_resizeXOrigin = mouseEvent->globalX();
 430             m_resizeWidget->setMouseTracking(true);
 431             event->accept();
 432             return true;
 433         }
 434
 435         case QEvent::MouseButtonDblClick: {
 436             // Reset the column width to the default value
 437             const ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 438             setMaximumWidth(settings->columnWidth());
 439             m_container->layoutColumns();
 440             m_resizeWidget->setMouseTracking(false);
 441             m_resizeXOrigin = -1;
 442             event->accept();
 443             return true;
 444         }
 445
 446         case QEvent::MouseMove: {
 447             // Resize the column and trigger a relayout of the container
 448             QMouseEvent* mouseEvent = static_cast<QMouseEvent*>(event);
 449             int requestedWidth = maximumWidth() - m_resizeXOrigin + mouseEvent->globalX();;
 450             if (requestedWidth < minimumWidth()) {
 451                 requestedWidth = minimumWidth();
 452             }
 453             setMaximumWidth(requestedWidth);
 454
 455             m_container->layoutColumns();
 456
 457             m_resizeXOrigin = mouseEvent->globalX();
 458
 459             event->accept();
 460             return true;
 461         }
 462
 463         case QEvent::MouseButtonRelease: {
 464             // The resizing has been finished
 465             m_resizeWidget->setMouseTracking(false);
 466             m_resizeXOrigin = -1;
 467             event->accept();
 468             return true;
 469         }
 470
 471         default:
 472             break;
 473         }
 474     }
 475     return DolphinTreeView::eventFilter(watched, event);
 476 }
 477 void DolphinColumnView::setZoomLevel(int level)
 478 {
 479     const int size = ZoomLevelInfo::iconSizeForZoomLevel(level);
 480     ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 481
 482     const bool showPreview = m_container->m_dolphinViewController->view()->showPreview();
 483     if (showPreview) {
 484         settings->setPreviewSize(size);
 485     } else {
 486         settings->setIconSize(size);
 487     }
 488
 489     updateDecorationSize(showPreview);
 490 }
 491
 492 void DolphinColumnView::slotEntered(const QModelIndex& index)
 493 {
 494     m_container->m_dolphinViewController->setItemView(this);
 495     m_container->m_dolphinViewController->emitItemEntered(index);
 496 }
 497
 498 void DolphinColumnView::requestActivation()
 499 {
 500     m_container->m_dolphinViewController->requestActivation();
 501     if (!m_active) {
 502         m_container->requestActivation(this);
 503         selectionModel()->clear();
 504     }
 505 }
 506
 507 void DolphinColumnView::updateFont()
 508 {
 509     const ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 510     Q_ASSERT(settings != 0);
 511
 512     if (settings->useSystemFont()) {
 513         m_font = KGlobalSettings::generalFont();
 514     }
 515 }
 516
 517 void DolphinColumnView::slotShowPreviewChanged()
 518 {
 519     const DolphinView* view = m_container->m_dolphinViewController->view();
 520     updateDecorationSize(view->showPreview());
 521 }
 522
 523 void DolphinColumnView::slotDirListerCompleted()
 524 {
 525     if (!m_childUrl.isEmpty()) {
 526         return;
 527     }
 528
 529     // Try to optimize the width of the column, so that no name gets clipped
 530     const int requiredWidth = sizeHintForColumn(DolphinModel::Name);
 531
 532     const ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 533     if (requiredWidth > settings->columnWidth()) {
 534         int frameAroundContents = 0;
 535         if (style()->styleHint(QStyle::SH_ScrollView_FrameOnlyAroundContents)) {
 536             // TODO: Using 2 PM_DefaultFrameWidths are not sufficient. Check Qt-code
 537             // for other pixelmetrics that should be added...
 538             frameAroundContents = style()->pixelMetric(QStyle::PM_DefaultFrameWidth) * 4;
 539         }
 540
 541         const int scrollBarWidth = style()->pixelMetric(QStyle::PM_ScrollBarExtent, 0, verticalScrollBar());
 542
 543         setMaximumWidth(requiredWidth + frameAroundContents + scrollBarWidth);
 544         m_container->layoutColumns();
 545         if (m_active) {
 546             m_container->assureVisibleActiveColumn();
 547         }
 548     }
 549 }
 550
 551 void DolphinColumnView::activate()
 552 {
 553     setFocus(Qt::OtherFocusReason);
 554
 555     if (KGlobalSettings::singleClick()) {
 556         connect(this, SIGNAL(clicked(const QModelIndex&)),
 557                 m_container->m_dolphinViewController, SLOT(triggerItem(const QModelIndex&)));
 558     } else {
 559         connect(this, SIGNAL(doubleClicked(const QModelIndex&)),
 560                 m_container->m_dolphinViewController, SLOT(triggerItem(const QModelIndex&)));
 561     }
 562
 563     if (selectionModel() && selectionModel()->currentIndex().isValid()) {
 564         selectionModel()->setCurrentIndex(selectionModel()->currentIndex(), QItemSelectionModel::SelectCurrent);
 565     }
 566
 567     updateBackground();
 568 }
 569
 570 void DolphinColumnView::deactivate()
 571 {
 572     clearFocus();
 573     if (KGlobalSettings::singleClick()) {
 574         disconnect(this, SIGNAL(clicked(const QModelIndex&)),
 575                    m_container->m_dolphinViewController, SLOT(triggerItem(const QModelIndex&)));
 576     } else {
 577         disconnect(this, SIGNAL(doubleClicked(const QModelIndex&)),
 578                    m_container->m_dolphinViewController, SLOT(triggerItem(const QModelIndex&)));
 579     }
 580
 581     // It is important to disconnect the connection to requestActivation() temporary, otherwise the internal
 582     // clearing of the selection would result in activating the column again.
 583     disconnect(selectionModel(), SIGNAL(selectionChanged(QItemSelection, QItemSelection)),
 584                this, SLOT(requestActivation()));
 585     const QModelIndex current = selectionModel()->currentIndex();
 586     selectionModel()->clear();
 587     selectionModel()->setCurrentIndex(current, QItemSelectionModel::NoUpdate);
 588     connect(selectionModel(), SIGNAL(selectionChanged(QItemSelection, QItemSelection)),
 589             this, SLOT(requestActivation()));
 590
 591     updateBackground();
 592 }
 593
 594 void DolphinColumnView::updateDecorationSize(bool showPreview)
 595 {
 596     ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 597     const int iconSize = showPreview ? settings->previewSize() : settings->iconSize();
 598     const QSize size(iconSize, iconSize);
 599     setIconSize(size);
 600
 601     m_decorationSize = size;
 602
 603     doItemsLayout();
 604 }
 605
 606 #include "dolphincolumnview.moc"