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 <kiconeffect.h>
  44 #include <kjob.h>
  45 #include <konqmimedata.h>
  46
  47 #include <QApplication>
  48 #include <QClipboard>
  49 #include <QHeaderView>
  50 #include <QPainter>
  51 #include <QPoint>
  52 #include <QScrollBar>
  53
  54 DolphinColumnView::DolphinColumnView(QWidget* parent,
  55                                      DolphinColumnViewContainer* container,
  56                                      const KUrl& url) :
  57     DolphinTreeView(parent),
  58     m_active(false),
  59     m_container(container),
  60     m_extensionsFactory(0),
  61     m_url(url),
  62     m_childUrl(),
  63     m_font(),
  64     m_decorationSize(),
  65     m_dirLister(0),
  66     m_dolphinModel(0),
  67     m_proxyModel(0)
  68 {
  69     setMouseTracking(true);
  70     setAcceptDrops(true);
  71     setUniformRowHeights(true);
  72     setSelectionBehavior(SelectItems);
  73     setSelectionMode(QAbstractItemView::ExtendedSelection);
  74     setDragDropMode(QAbstractItemView::DragDrop);
  75     setDropIndicatorShown(false);
  76     setRootIsDecorated(false);
  77     setItemsExpandable(false);
  78     setEditTriggers(QAbstractItemView::NoEditTriggers);
  79
  80     const ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
  81     Q_ASSERT(settings != 0);
  82
  83     if (settings->useSystemFont()) {
  84         m_font = KGlobalSettings::generalFont();
  85     } else {
  86         m_font = QFont(settings->fontFamily(),
  87                        qRound(settings->fontSize()),
  88                        settings->fontWeight(),
  89                        settings->italicFont());
  90         m_font.setPointSizeF(settings->fontSize());
  91     }
  92
  93     connect(this, SIGNAL(viewportEntered()),
  94             m_container->m_dolphinViewController, SLOT(emitViewportEntered()));
  95     connect(this, SIGNAL(entered(const QModelIndex&)),
  96             this, SLOT(slotEntered(const QModelIndex&)));
  97
  98     const DolphinView* dolphinView = m_container->m_dolphinViewController->view();
  99     connect(dolphinView, SIGNAL(showPreviewChanged()),
 100             this, SLOT(slotShowPreviewChanged()));
 101
 102     m_dirLister = new DolphinDirLister();
 103     m_dirLister->setAutoUpdate(true);
 104     m_dirLister->setMainWindow(window());
 105     m_dirLister->setDelayedMimeTypes(true);
 106     const bool showHiddenFiles = m_container->m_dolphinViewController->view()->showHiddenFiles();
 107     m_dirLister->setShowingDotFiles(showHiddenFiles);
 108
 109     m_dolphinModel = new DolphinModel(this);
 110     m_dolphinModel->setDirLister(m_dirLister);
 111     m_dolphinModel->setDropsAllowed(DolphinModel::DropOnDirectory);
 112
 113     m_proxyModel = new DolphinSortFilterProxyModel(this);
 114     m_proxyModel->setSourceModel(m_dolphinModel);
 115     m_proxyModel->setFilterCaseSensitivity(Qt::CaseInsensitive);
 116
 117     m_proxyModel->setSorting(dolphinView->sorting());
 118     m_proxyModel->setSortOrder(dolphinView->sortOrder());
 119     m_proxyModel->setSortFoldersFirst(dolphinView->sortFoldersFirst());
 120
 121     setModel(m_proxyModel);
 122
 123     connect(KGlobalSettings::self(), SIGNAL(kdisplayFontChanged()),
 124             this, SLOT(updateFont()));
 125
 126     const ViewModeController* viewModeController = m_container->m_viewModeController;
 127     connect(viewModeController, SIGNAL(zoomLevelChanged(int)),
 128             this, SLOT(setZoomLevel(int)));
 129     const QString nameFilter = viewModeController->nameFilter();
 130     if (!nameFilter.isEmpty()) {
 131         m_proxyModel->setFilterFixedString(nameFilter);
 132     }
 133
 134     updateDecorationSize(dolphinView->showPreview());
 135     updateBackground();
 136
 137     DolphinViewController* dolphinViewController = m_container->m_dolphinViewController;
 138     m_extensionsFactory = new ViewExtensionsFactory(this, dolphinViewController, viewModeController);
 139     m_extensionsFactory->fileItemDelegate()->setMinimizedNameColumn(true);
 140
 141     m_dirLister->openUrl(url, KDirLister::NoFlags);
 142 }
 143
 144 DolphinColumnView::~DolphinColumnView()
 145 {
 146     delete m_proxyModel;
 147     m_proxyModel = 0;
 148     delete m_dolphinModel;
 149     m_dolphinModel = 0;
 150     m_dirLister = 0; // deleted by m_dolphinModel
 151 }
 152
 153 void DolphinColumnView::setActive(bool active)
 154 {
 155     if (m_active != active) {
 156         m_active = active;
 157
 158         if (active) {
 159             activate();
 160         } else {
 161             deactivate();
 162         }
 163     }
 164 }
 165
 166 void DolphinColumnView::updateBackground()
 167 {
 168     // TODO: The alpha-value 150 is copied from DolphinView::setActive(). When
 169     // cleaning up the cut-indication of DolphinColumnView with the code from
 170     // DolphinView a common helper-class should be available which can be shared
 171     // by all view implementations -> no hardcoded value anymore
 172     const QPalette::ColorRole role = viewport()->backgroundRole();
 173     QColor color = viewport()->palette().color(role);
 174     color.setAlpha((m_active && m_container->m_active) ? 255 : 150);
 175
 176     QPalette palette = viewport()->palette();
 177     palette.setColor(role, color);
 178     viewport()->setPalette(palette);
 179
 180     update();
 181 }
 182
 183 KFileItem DolphinColumnView::itemAt(const QPoint& pos) const
 184 {
 185     KFileItem item;
 186     const QModelIndex index = indexAt(pos);
 187     if (index.isValid() && (index.column() == DolphinModel::Name)) {
 188         const QModelIndex dolphinModelIndex = m_proxyModel->mapToSource(index);
 189         item = m_dolphinModel->itemForIndex(dolphinModelIndex);
 190     }
 191     return item;
 192 }
 193
 194 void DolphinColumnView::setSelectionModel(QItemSelectionModel* model)
 195 {
 196     // If a change of the selection is done although the view is not active
 197     // (e. g. by the selection markers), the column must be activated. This
 198     // is done by listening to the current selectionChanged() signal.
 199     if (selectionModel() != 0) {
 200         disconnect(selectionModel(), SIGNAL(selectionChanged(QItemSelection, QItemSelection)),
 201                    this, SLOT(requestActivation()));
 202     }
 203
 204     DolphinTreeView::setSelectionModel(model);
 205
 206     connect(selectionModel(), SIGNAL(selectionChanged(QItemSelection, QItemSelection)),
 207             this, SLOT(requestActivation()));
 208 }
 209
 210 QStyleOptionViewItem DolphinColumnView::viewOptions() const
 211 {
 212     QStyleOptionViewItem viewOptions = DolphinTreeView::viewOptions();
 213     viewOptions.font = m_font;
 214     viewOptions.fontMetrics = QFontMetrics(m_font);
 215     viewOptions.decorationSize = m_decorationSize;
 216     viewOptions.showDecorationSelected = true;
 217     return viewOptions;
 218 }
 219
 220 bool DolphinColumnView::event(QEvent* event)
 221 {
 222     if (event->type() == QEvent::Polish) {
 223         // Hide all columns except of the 'Name' column
 224         for (int i = DolphinModel::Name + 1; i < DolphinModel::ExtraColumnCount; ++i) {
 225             hideColumn(i);
 226         }
 227         header()->hide();
 228     }
 229
 230     return DolphinTreeView::event(event);
 231 }
 232
 233 void DolphinColumnView::startDrag(Qt::DropActions supportedActions)
 234 {
 235     DragAndDropHelper::instance().startDrag(this, supportedActions, m_container->m_dolphinViewController);
 236     DolphinTreeView::startDrag(supportedActions);
 237 }
 238
 239 void DolphinColumnView::dragEnterEvent(QDragEnterEvent* event)
 240 {
 241     if (DragAndDropHelper::instance().isMimeDataSupported(event->mimeData())) {
 242         event->acceptProposedAction();
 243         requestActivation();
 244     }
 245     DolphinTreeView::dragEnterEvent(event);
 246 }
 247
 248 void DolphinColumnView::dragMoveEvent(QDragMoveEvent* event)
 249 {
 250     DolphinTreeView::dragMoveEvent(event);
 251
 252     if (DragAndDropHelper::instance().isMimeDataSupported(event->mimeData())) {
 253         // accept url drops, independently from the destination item
 254         event->acceptProposedAction();
 255     }
 256 }
 257
 258 void DolphinColumnView::dropEvent(QDropEvent* event)
 259 {
 260     const QModelIndex index = indexAt(event->pos());
 261     m_container->m_dolphinViewController->setItemView(this);
 262     const QModelIndex dolphinModelIndex = m_proxyModel->mapToSource(index);
 263     const KFileItem item = m_dolphinModel->itemForIndex(dolphinModelIndex);
 264     m_container->m_dolphinViewController->indicateDroppedUrls(item, url(), event);
 265     DolphinTreeView::dropEvent(event);
 266 }
 267
 268 void DolphinColumnView::paintEvent(QPaintEvent* event)
 269 {
 270     if (!m_childUrl.isEmpty()) {
 271         // indicate the shown URL of the next column by highlighting the shown folder item
 272         const QModelIndex dirIndex = m_dolphinModel->indexForUrl(m_childUrl);
 273         const QModelIndex proxyIndex = m_proxyModel->mapFromSource(dirIndex);
 274         if (proxyIndex.isValid() && !selectionModel()->isSelected(proxyIndex)) {
 275             const QRect itemRect = visualRect(proxyIndex);
 276             QPainter painter(viewport());
 277             QColor color = KColorScheme(QPalette::Active, KColorScheme::View).foreground().color();
 278             color.setAlpha(32);
 279             painter.setPen(Qt::NoPen);
 280             painter.setBrush(color);
 281             painter.drawRect(itemRect);
 282         }
 283     }
 284
 285     DolphinTreeView::paintEvent(event);
 286 }
 287
 288 void DolphinColumnView::mousePressEvent(QMouseEvent* event)
 289 {
 290     requestActivation();
 291     if (!indexAt(event->pos()).isValid() && (QApplication::mouseButtons() & Qt::MidButton)) {
 292         m_container->m_dolphinViewController->replaceUrlByClipboard();
 293     }
 294
 295     DolphinTreeView::mousePressEvent(event);
 296 }
 297
 298 void DolphinColumnView::keyPressEvent(QKeyEvent* event)
 299 {
 300     DolphinTreeView::keyPressEvent(event);
 301
 302     DolphinViewController* controller = m_container->m_dolphinViewController;
 303     controller->handleKeyPressEvent(event);
 304     switch (event->key()) {
 305     case Qt::Key_Right: {
 306         // Special key handling for the column: A Key_Right should
 307         // open a new column for the currently selected folder.
 308         const QModelIndex dolphinModelIndex = m_proxyModel->mapToSource(currentIndex());
 309         const KFileItem item = m_dolphinModel->itemForIndex(dolphinModelIndex);
 310         if (!item.isNull() && item.isDir()) {
 311             controller->emitItemTriggered(item);
 312         }
 313         break;
 314     }
 315
 316     case Qt::Key_Escape:
 317         selectionModel()->setCurrentIndex(selectionModel()->currentIndex(),
 318                                           QItemSelectionModel::Current |
 319                                           QItemSelectionModel::Clear);
 320         break;
 321
 322     default:
 323         break;
 324     }
 325 }
 326
 327 void DolphinColumnView::contextMenuEvent(QContextMenuEvent* event)
 328 {
 329     requestActivation();
 330     DolphinTreeView::contextMenuEvent(event);
 331     m_container->m_dolphinViewController->triggerContextMenuRequest(event->pos());
 332 }
 333
 334 void DolphinColumnView::wheelEvent(QWheelEvent* event)
 335 {
 336     const int step = m_decorationSize.height();
 337     verticalScrollBar()->setSingleStep(step);
 338     DolphinTreeView::wheelEvent(event);
 339 }
 340
 341 void DolphinColumnView::leaveEvent(QEvent* event)
 342 {
 343     DolphinTreeView::leaveEvent(event);
 344     // if the mouse is above an item and moved very fast outside the widget,
 345     // no viewportEntered() signal might be emitted although the mouse has been moved
 346     // above the viewport
 347     m_container->m_dolphinViewController->emitViewportEntered();
 348 }
 349
 350 void DolphinColumnView::currentChanged(const QModelIndex& current, const QModelIndex& previous)
 351 {
 352     DolphinTreeView::currentChanged(current, previous);
 353     m_extensionsFactory->handleCurrentIndexChange(current, previous);
 354 }
 355
 356 QRect DolphinColumnView::visualRect(const QModelIndex& index) const
 357 {
 358     QRect rect = DolphinTreeView::visualRect(index);
 359
 360     const QModelIndex dolphinModelIndex = m_proxyModel->mapToSource(index);
 361     const KFileItem item = m_dolphinModel->itemForIndex(dolphinModelIndex);
 362     if (!item.isNull()) {
 363         const int width = DolphinFileItemDelegate::nameColumnWidth(item.text(), viewOptions());
 364         rect.setWidth(width);
 365     }
 366
 367     return rect;
 368 }
 369
 370 bool DolphinColumnView::acceptsDrop(const QModelIndex& index) const
 371 {
 372     if (index.isValid() && (index.column() == DolphinModel::Name)) {
 373         // Accept drops above directories
 374         const QModelIndex dolphinModelIndex = m_proxyModel->mapToSource(index);
 375         const KFileItem item = m_dolphinModel->itemForIndex(dolphinModelIndex);
 376         return !item.isNull() && item.isDir();
 377     }
 378
 379     return false;
 380 }
 381
 382 void DolphinColumnView::setZoomLevel(int level)
 383 {
 384     const int size = ZoomLevelInfo::iconSizeForZoomLevel(level);
 385     ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 386
 387     const bool showPreview = m_container->m_dolphinViewController->view()->showPreview();
 388     if (showPreview) {
 389         settings->setPreviewSize(size);
 390     } else {
 391         settings->setIconSize(size);
 392     }
 393
 394     updateDecorationSize(showPreview);
 395 }
 396
 397 void DolphinColumnView::slotEntered(const QModelIndex& index)
 398 {
 399     m_container->m_dolphinViewController->setItemView(this);
 400     m_container->m_dolphinViewController->emitItemEntered(index);
 401 }
 402
 403 void DolphinColumnView::requestActivation()
 404 {
 405     m_container->m_dolphinViewController->requestActivation();
 406     if (!m_active) {
 407         m_container->requestActivation(this);
 408         selectionModel()->clear();
 409     }
 410 }
 411
 412 void DolphinColumnView::updateFont()
 413 {
 414     const ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 415     Q_ASSERT(settings != 0);
 416
 417     if (settings->useSystemFont()) {
 418         m_font = KGlobalSettings::generalFont();
 419     }
 420 }
 421
 422 void DolphinColumnView::slotShowPreviewChanged()
 423 {
 424     const DolphinView* view = m_container->m_dolphinViewController->view();
 425     updateDecorationSize(view->showPreview());
 426 }
 427
 428 void DolphinColumnView::activate()
 429 {
 430     setFocus(Qt::OtherFocusReason);
 431
 432     if (KGlobalSettings::singleClick()) {
 433         connect(this, SIGNAL(clicked(const QModelIndex&)),
 434                 m_container->m_dolphinViewController, SLOT(triggerItem(const QModelIndex&)));
 435     } else {
 436         connect(this, SIGNAL(doubleClicked(const QModelIndex&)),
 437                 m_container->m_dolphinViewController, SLOT(triggerItem(const QModelIndex&)));
 438     }
 439
 440     if (selectionModel() && selectionModel()->currentIndex().isValid()) {
 441         selectionModel()->setCurrentIndex(selectionModel()->currentIndex(), QItemSelectionModel::SelectCurrent);
 442     }
 443
 444     updateBackground();
 445 }
 446
 447 void DolphinColumnView::deactivate()
 448 {
 449     clearFocus();
 450     if (KGlobalSettings::singleClick()) {
 451         disconnect(this, SIGNAL(clicked(const QModelIndex&)),
 452                    m_container->m_dolphinViewController, SLOT(triggerItem(const QModelIndex&)));
 453     } else {
 454         disconnect(this, SIGNAL(doubleClicked(const QModelIndex&)),
 455                    m_container->m_dolphinViewController, SLOT(triggerItem(const QModelIndex&)));
 456     }
 457
 458     // It is important to disconnect the connection to requestActivation() temporary, otherwise the internal
 459     // clearing of the selection would result in activating the column again.
 460     disconnect(selectionModel(), SIGNAL(selectionChanged(QItemSelection, QItemSelection)),
 461                this, SLOT(requestActivation()));
 462     const QModelIndex current = selectionModel()->currentIndex();
 463     selectionModel()->clear();
 464     selectionModel()->setCurrentIndex(current, QItemSelectionModel::NoUpdate);
 465     connect(selectionModel(), SIGNAL(selectionChanged(QItemSelection, QItemSelection)),
 466             this, SLOT(requestActivation()));
 467
 468     updateBackground();
 469 }
 470
 471 void DolphinColumnView::updateDecorationSize(bool showPreview)
 472 {
 473     ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 474     const int iconSize = showPreview ? settings->previewSize() : settings->iconSize();
 475     const QSize size(iconSize, iconSize);
 476     setIconSize(size);
 477
 478     m_decorationSize = size;
 479
 480     doItemsLayout();
 481 }
 482
 483 #include "dolphincolumnview.moc"