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.h>
  40 #include <kdirlister.h>
  41 #include <kfileitem.h>
  42 #include <kio/previewjob.h>
  43 #include <kicon.h>
  44 #include <kiconeffect.h>
  45 #include <kjob.h>
  46 #include <klocale.h>
  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
 124     m_dolphinModel = new DolphinModel(this);
 125     m_dolphinModel->setDirLister(m_dirLister);
 126     m_dolphinModel->setDropsAllowed(DolphinModel::DropOnDirectory);
 127
 128     m_proxyModel = new DolphinSortFilterProxyModel(this);
 129     m_proxyModel->setSourceModel(m_dolphinModel);
 130     m_proxyModel->setFilterCaseSensitivity(Qt::CaseInsensitive);
 131
 132     m_proxyModel->setSorting(dolphinView->sorting());
 133     m_proxyModel->setSortOrder(dolphinView->sortOrder());
 134     m_proxyModel->setSortFoldersFirst(dolphinView->sortFoldersFirst());
 135
 136     setModel(m_proxyModel);
 137
 138     connect(KGlobalSettings::self(), SIGNAL(kdisplayFontChanged()),
 139             this, SLOT(updateFont()));
 140
 141     const ViewModeController* viewModeController = m_container->m_viewModeController;
 142     connect(viewModeController, SIGNAL(zoomLevelChanged(int)),
 143             this, SLOT(setZoomLevel(int)));
 144     const QString nameFilter = viewModeController->nameFilter();
 145     if (!nameFilter.isEmpty()) {
 146         m_proxyModel->setFilterFixedString(nameFilter);
 147     }
 148
 149     updateDecorationSize(dolphinView->showPreview());
 150     updateBackground();
 151
 152     DolphinViewController* dolphinViewController = m_container->m_dolphinViewController;
 153     m_extensionsFactory = new ViewExtensionsFactory(this, dolphinViewController, viewModeController);
 154     m_extensionsFactory->fileItemDelegate()->setMinimizedNameColumn(true);
 155
 156     m_dirLister->openUrl(url, KDirLister::NoFlags);
 157 }
 158
 159 DolphinColumnView::~DolphinColumnView()
 160 {
 161     delete m_proxyModel;
 162     m_proxyModel = 0;
 163     delete m_dolphinModel;
 164     m_dolphinModel = 0;
 165     m_dirLister = 0; // deleted by m_dolphinModel
 166 }
 167
 168 void DolphinColumnView::setActive(bool active)
 169 {
 170     if (m_active != active) {
 171         m_active = active;
 172
 173         if (active) {
 174             activate();
 175         } else {
 176             deactivate();
 177         }
 178     }
 179 }
 180
 181 void DolphinColumnView::updateBackground()
 182 {
 183     // TODO: The alpha-value 150 is copied from DolphinView::setActive(). When
 184     // cleaning up the cut-indication of DolphinColumnView with the code from
 185     // DolphinView a common helper-class should be available which can be shared
 186     // by all view implementations -> no hardcoded value anymore
 187     const QPalette::ColorRole role = viewport()->backgroundRole();
 188     QColor color = viewport()->palette().color(role);
 189     color.setAlpha((m_active && m_container->m_active) ? 255 : 150);
 190
 191     QPalette palette = viewport()->palette();
 192     palette.setColor(role, color);
 193     viewport()->setPalette(palette);
 194
 195     update();
 196 }
 197
 198 KFileItem DolphinColumnView::itemAt(const QPoint& pos) const
 199 {
 200     KFileItem item;
 201     const QModelIndex index = indexAt(pos);
 202     if (index.isValid() && (index.column() == DolphinModel::Name)) {
 203         const QModelIndex dolphinModelIndex = m_proxyModel->mapToSource(index);
 204         item = m_dolphinModel->itemForIndex(dolphinModelIndex);
 205     }
 206     return item;
 207 }
 208
 209 void DolphinColumnView::setSelectionModel(QItemSelectionModel* model)
 210 {
 211     // If a change of the selection is done although the view is not active
 212     // (e. g. by the selection markers), the column must be activated. This
 213     // is done by listening to the current selectionChanged() signal.
 214     if (selectionModel() != 0) {
 215         disconnect(selectionModel(), SIGNAL(selectionChanged(QItemSelection, QItemSelection)),
 216                    this, SLOT(requestActivation()));
 217     }
 218
 219     DolphinTreeView::setSelectionModel(model);
 220
 221     connect(selectionModel(), SIGNAL(selectionChanged(QItemSelection, QItemSelection)),
 222             this, SLOT(requestActivation()));
 223 }
 224
 225 QStyleOptionViewItem DolphinColumnView::viewOptions() const
 226 {
 227     QStyleOptionViewItem viewOptions = DolphinTreeView::viewOptions();
 228     viewOptions.font = m_font;
 229     viewOptions.fontMetrics = QFontMetrics(m_font);
 230     viewOptions.decorationSize = m_decorationSize;
 231     viewOptions.showDecorationSelected = true;
 232     return viewOptions;
 233 }
 234
 235 bool DolphinColumnView::event(QEvent* event)
 236 {
 237     if (event->type() == QEvent::Polish) {
 238         // Hide all columns except of the 'Name' column
 239         for (int i = DolphinModel::Name + 1; i < DolphinModel::ExtraColumnCount; ++i) {
 240             hideColumn(i);
 241         }
 242         header()->hide();
 243     }
 244
 245     return DolphinTreeView::event(event);
 246 }
 247
 248 void DolphinColumnView::startDrag(Qt::DropActions supportedActions)
 249 {
 250     DragAndDropHelper::instance().startDrag(this, supportedActions, m_container->m_dolphinViewController);
 251     DolphinTreeView::startDrag(supportedActions);
 252 }
 253
 254 void DolphinColumnView::dragEnterEvent(QDragEnterEvent* event)
 255 {
 256     if (DragAndDropHelper::instance().isMimeDataSupported(event->mimeData())) {
 257         event->acceptProposedAction();
 258         requestActivation();
 259     }
 260     DolphinTreeView::dragEnterEvent(event);
 261 }
 262
 263 void DolphinColumnView::dragMoveEvent(QDragMoveEvent* event)
 264 {
 265     DolphinTreeView::dragMoveEvent(event);
 266
 267     if (DragAndDropHelper::instance().isMimeDataSupported(event->mimeData())) {
 268         // accept url drops, independently from the destination item
 269         event->acceptProposedAction();
 270     }
 271 }
 272
 273 void DolphinColumnView::dropEvent(QDropEvent* event)
 274 {
 275     const QModelIndex index = indexAt(event->pos());
 276     m_container->m_dolphinViewController->setItemView(this);
 277     const QModelIndex dolphinModelIndex = m_proxyModel->mapToSource(index);
 278     const KFileItem item = m_dolphinModel->itemForIndex(dolphinModelIndex);
 279     m_container->m_dolphinViewController->indicateDroppedUrls(item, url(), event);
 280     DolphinTreeView::dropEvent(event);
 281 }
 282
 283 void DolphinColumnView::paintEvent(QPaintEvent* event)
 284 {
 285     if (!m_childUrl.isEmpty()) {
 286         // Indicate the shown URL of the next column by highlighting the shown folder item
 287         const QModelIndex dirIndex = m_dolphinModel->indexForUrl(m_childUrl);
 288         const QModelIndex proxyIndex = m_proxyModel->mapFromSource(dirIndex);
 289         if (proxyIndex.isValid() && !selectionModel()->isSelected(proxyIndex)) {
 290             QPainter painter(viewport());
 291
 292             QStyleOptionViewItemV4 option;
 293             option.initFrom(this);
 294             option.rect = visualRect(proxyIndex);
 295             option.state = QStyle::State_Enabled | QStyle::State_HasFocus;
 296             option.viewItemPosition = QStyleOptionViewItemV4::OnlyOne;
 297             style()->drawPrimitive(QStyle::PE_FrameFocusRect, &option, &painter, this);
 298         }
 299     }
 300
 301     DolphinTreeView::paintEvent(event);
 302 }
 303
 304 void DolphinColumnView::mousePressEvent(QMouseEvent* event)
 305 {
 306     requestActivation();
 307     if (!indexAt(event->pos()).isValid() && (QApplication::mouseButtons() & Qt::MidButton)) {
 308         m_container->m_dolphinViewController->replaceUrlByClipboard();
 309     }
 310
 311     DolphinTreeView::mousePressEvent(event);
 312 }
 313
 314 void DolphinColumnView::keyPressEvent(QKeyEvent* event)
 315 {
 316     DolphinTreeView::keyPressEvent(event);
 317
 318     DolphinViewController* controller = m_container->m_dolphinViewController;
 319     controller->handleKeyPressEvent(event);
 320     switch (event->key()) {
 321     case Qt::Key_Right: {
 322         // Special key handling for the column: A Key_Right should
 323         // open a new column for the currently selected folder.
 324         const QModelIndex dolphinModelIndex = m_proxyModel->mapToSource(currentIndex());
 325         const KFileItem item = m_dolphinModel->itemForIndex(dolphinModelIndex);
 326         if (!item.isNull() && item.isDir()) {
 327             controller->emitItemTriggered(item);
 328         }
 329         break;
 330     }
 331
 332     case Qt::Key_Escape:
 333         selectionModel()->setCurrentIndex(selectionModel()->currentIndex(),
 334                                           QItemSelectionModel::Current |
 335                                           QItemSelectionModel::Clear);
 336         break;
 337
 338     default:
 339         break;
 340     }
 341 }
 342
 343 void DolphinColumnView::contextMenuEvent(QContextMenuEvent* event)
 344 {
 345     requestActivation();
 346     DolphinTreeView::contextMenuEvent(event);
 347     m_container->m_dolphinViewController->triggerContextMenuRequest(event->pos());
 348 }
 349
 350 void DolphinColumnView::wheelEvent(QWheelEvent* event)
 351 {
 352     const int step = m_decorationSize.height();
 353     verticalScrollBar()->setSingleStep(step);
 354     DolphinTreeView::wheelEvent(event);
 355 }
 356
 357 void DolphinColumnView::leaveEvent(QEvent* event)
 358 {
 359     DolphinTreeView::leaveEvent(event);
 360     // if the mouse is above an item and moved very fast outside the widget,
 361     // no viewportEntered() signal might be emitted although the mouse has been moved
 362     // above the viewport
 363     m_container->m_dolphinViewController->emitViewportEntered();
 364 }
 365
 366 void DolphinColumnView::currentChanged(const QModelIndex& current, const QModelIndex& previous)
 367 {
 368     DolphinTreeView::currentChanged(current, previous);
 369     m_extensionsFactory->handleCurrentIndexChange(current, previous);
 370 }
 371
 372 QRect DolphinColumnView::visualRect(const QModelIndex& index) const
 373 {
 374     QRect rect = DolphinTreeView::visualRect(index);
 375
 376     const QModelIndex dolphinModelIndex = m_proxyModel->mapToSource(index);
 377     const KFileItem item = m_dolphinModel->itemForIndex(dolphinModelIndex);
 378     if (!item.isNull()) {
 379         const int width = DolphinFileItemDelegate::nameColumnWidth(item.text(), viewOptions());
 380         rect.setWidth(width);
 381     }
 382
 383     return rect;
 384 }
 385
 386 bool DolphinColumnView::acceptsDrop(const QModelIndex& index) const
 387 {
 388     if (index.isValid() && (index.column() == DolphinModel::Name)) {
 389         // Accept drops above directories
 390         const QModelIndex dolphinModelIndex = m_proxyModel->mapToSource(index);
 391         const KFileItem item = m_dolphinModel->itemForIndex(dolphinModelIndex);
 392         return !item.isNull() && item.isDir();
 393     }
 394
 395     return false;
 396 }
 397
 398 bool DolphinColumnView::eventFilter(QObject* watched, QEvent* event)
 399 {
 400     if (watched == m_resizeWidget) {
 401         switch (event->type()) {
 402         case QEvent::MouseButtonPress: {
 403             // Initiate the resizing of the column
 404             QMouseEvent* mouseEvent = static_cast<QMouseEvent*>(event);
 405             m_resizeXOrigin = mouseEvent->globalX();
 406             m_resizeWidget->setMouseTracking(true);
 407             event->accept();
 408             return true;
 409         }
 410
 411         case QEvent::MouseButtonDblClick: {
 412             // Reset the column width to the default value
 413             const ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 414             setMaximumWidth(settings->columnWidth());
 415             m_container->layoutColumns();
 416             m_resizeWidget->setMouseTracking(false);
 417             m_resizeXOrigin = -1;
 418             event->accept();
 419             return true;
 420         }
 421
 422         case QEvent::MouseMove: {
 423             // Resize the column and trigger a relayout of the container
 424             QMouseEvent* mouseEvent = static_cast<QMouseEvent*>(event);
 425             int requestedWidth = maximumWidth() - m_resizeXOrigin + mouseEvent->globalX();;
 426             if (requestedWidth < minimumWidth()) {
 427                 requestedWidth = minimumWidth();
 428             }
 429             setMaximumWidth(requestedWidth);
 430
 431             m_container->layoutColumns();
 432
 433             m_resizeXOrigin = mouseEvent->globalX();
 434
 435             event->accept();
 436             return true;
 437         }
 438
 439         case QEvent::MouseButtonRelease: {
 440             // The resizing has been finished
 441             m_resizeWidget->setMouseTracking(false);
 442             m_resizeXOrigin = -1;
 443             event->accept();
 444             return true;
 445         }
 446
 447         default:
 448             break;
 449         }
 450     }
 451     return DolphinTreeView::eventFilter(watched, event);
 452 }
 453 void DolphinColumnView::setZoomLevel(int level)
 454 {
 455     const int size = ZoomLevelInfo::iconSizeForZoomLevel(level);
 456     ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 457
 458     const bool showPreview = m_container->m_dolphinViewController->view()->showPreview();
 459     if (showPreview) {
 460         settings->setPreviewSize(size);
 461     } else {
 462         settings->setIconSize(size);
 463     }
 464
 465     updateDecorationSize(showPreview);
 466 }
 467
 468 void DolphinColumnView::slotEntered(const QModelIndex& index)
 469 {
 470     m_container->m_dolphinViewController->setItemView(this);
 471     m_container->m_dolphinViewController->emitItemEntered(index);
 472 }
 473
 474 void DolphinColumnView::requestActivation()
 475 {
 476     m_container->m_dolphinViewController->requestActivation();
 477     if (!m_active) {
 478         m_container->requestActivation(this);
 479         selectionModel()->clear();
 480     }
 481 }
 482
 483 void DolphinColumnView::updateFont()
 484 {
 485     const ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 486     Q_ASSERT(settings != 0);
 487
 488     if (settings->useSystemFont()) {
 489         m_font = KGlobalSettings::generalFont();
 490     }
 491 }
 492
 493 void DolphinColumnView::slotShowPreviewChanged()
 494 {
 495     const DolphinView* view = m_container->m_dolphinViewController->view();
 496     updateDecorationSize(view->showPreview());
 497 }
 498
 499 void DolphinColumnView::activate()
 500 {
 501     setFocus(Qt::OtherFocusReason);
 502
 503     if (KGlobalSettings::singleClick()) {
 504         connect(this, SIGNAL(clicked(const QModelIndex&)),
 505                 m_container->m_dolphinViewController, SLOT(triggerItem(const QModelIndex&)));
 506     } else {
 507         connect(this, SIGNAL(doubleClicked(const QModelIndex&)),
 508                 m_container->m_dolphinViewController, SLOT(triggerItem(const QModelIndex&)));
 509     }
 510
 511     if (selectionModel() && selectionModel()->currentIndex().isValid()) {
 512         selectionModel()->setCurrentIndex(selectionModel()->currentIndex(), QItemSelectionModel::SelectCurrent);
 513     }
 514
 515     updateBackground();
 516 }
 517
 518 void DolphinColumnView::deactivate()
 519 {
 520     clearFocus();
 521     if (KGlobalSettings::singleClick()) {
 522         disconnect(this, SIGNAL(clicked(const QModelIndex&)),
 523                    m_container->m_dolphinViewController, SLOT(triggerItem(const QModelIndex&)));
 524     } else {
 525         disconnect(this, SIGNAL(doubleClicked(const QModelIndex&)),
 526                    m_container->m_dolphinViewController, SLOT(triggerItem(const QModelIndex&)));
 527     }
 528
 529     // It is important to disconnect the connection to requestActivation() temporary, otherwise the internal
 530     // clearing of the selection would result in activating the column again.
 531     disconnect(selectionModel(), SIGNAL(selectionChanged(QItemSelection, QItemSelection)),
 532                this, SLOT(requestActivation()));
 533     const QModelIndex current = selectionModel()->currentIndex();
 534     selectionModel()->clear();
 535     selectionModel()->setCurrentIndex(current, QItemSelectionModel::NoUpdate);
 536     connect(selectionModel(), SIGNAL(selectionChanged(QItemSelection, QItemSelection)),
 537             this, SLOT(requestActivation()));
 538
 539     updateBackground();
 540 }
 541
 542 void DolphinColumnView::updateDecorationSize(bool showPreview)
 543 {
 544     ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 545     const int iconSize = showPreview ? settings->previewSize() : settings->iconSize();
 546     const QSize size(iconSize, iconSize);
 547     setIconSize(size);
 548
 549     m_decorationSize = size;
 550
 551     doItemsLayout();
 552 }
 553
 554 #include "dolphincolumnview.moc"