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 "dolphinsortfilterproxymodel.h"
  27 #include "settings/dolphinsettings.h"
  28 #include "dolphinviewautoscroller.h"
  29 #include "dolphin_columnmodesettings.h"
  30 #include "dolphin_generalsettings.h"
  31 #include "draganddrophelper.h"
  32 #include "folderexpander.h"
  33 #include "tooltips/tooltipmanager.h"
  34 #include "viewextensionsfactory.h"
  35 #include "viewmodecontroller.h"
  36 #include "zoomlevelinfo.h"
  37
  38 #include <kcolorscheme.h>
  39 #include <kdirlister.h>
  40 #include <kfileitem.h>
  41 #include <kio/previewjob.h>
  42 #include <kiconeffect.h>
  43 #include <kjob.h>
  44 #include <konqmimedata.h>
  45
  46 #include <QApplication>
  47 #include <QClipboard>
  48 #include <QPainter>
  49 #include <QPoint>
  50 #include <QScrollBar>
  51
  52 DolphinColumnView::DolphinColumnView(QWidget* parent,
  53                                      DolphinColumnViewContainer* container,
  54                                      const KUrl& url) :
  55     QListView(parent),
  56     m_active(false),
  57     m_container(container),
  58     m_extensionsFactory(0),
  59     m_url(url),
  60     m_childUrl(),
  61     m_font(),
  62     m_decorationSize(),
  63     m_dirLister(0),
  64     m_dolphinModel(0),
  65     m_proxyModel(0),
  66     m_dropRect()
  67 {
  68     setMouseTracking(true);
  69     setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
  70     setVerticalScrollBarPolicy(Qt::ScrollBarAsNeeded);
  71     setSelectionBehavior(SelectItems);
  72     setSelectionMode(QAbstractItemView::ExtendedSelection);
  73     setDragDropMode(QAbstractItemView::DragDrop);
  74     setDropIndicatorShown(false);
  75     setSelectionRectVisible(true);
  76     setEditTriggers(QAbstractItemView::NoEditTriggers);
  77
  78     setVerticalScrollMode(QListView::ScrollPerPixel);
  79     setHorizontalScrollMode(QListView::ScrollPerPixel);
  80
  81     // apply the column mode settings to the widget
  82     const ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
  83     Q_ASSERT(settings != 0);
  84
  85     if (settings->useSystemFont()) {
  86         m_font = KGlobalSettings::generalFont();
  87     } else {
  88         m_font = QFont(settings->fontFamily(),
  89                        qRound(settings->fontSize()),
  90                        settings->fontWeight(),
  91                        settings->italicFont());
  92         m_font.setPointSizeF(settings->fontSize());
  93     }
  94
  95     connect(this, SIGNAL(viewportEntered()),
  96             m_container->m_dolphinViewController, SLOT(emitViewportEntered()));
  97     connect(this, SIGNAL(entered(const QModelIndex&)),
  98             this, SLOT(slotEntered(const QModelIndex&)));
  99
 100     const DolphinView* dolphinView = m_container->m_dolphinViewController->view();
 101     connect(dolphinView, SIGNAL(showPreviewChanged()),
 102             this, SLOT(slotShowPreviewChanged()));
 103
 104     m_dirLister = new DolphinDirLister();
 105     m_dirLister->setAutoUpdate(true);
 106     m_dirLister->setMainWindow(window());
 107     m_dirLister->setDelayedMimeTypes(true);
 108     const bool showHiddenFiles = m_container->m_dolphinViewController->view()->showHiddenFiles();
 109     m_dirLister->setShowingDotFiles(showHiddenFiles);
 110
 111     m_dolphinModel = new DolphinModel(this);
 112     m_dolphinModel->setDirLister(m_dirLister);
 113     m_dolphinModel->setDropsAllowed(DolphinModel::DropOnDirectory);
 114
 115     m_proxyModel = new DolphinSortFilterProxyModel(this);
 116     m_proxyModel->setSourceModel(m_dolphinModel);
 117     m_proxyModel->setFilterCaseSensitivity(Qt::CaseInsensitive);
 118
 119     m_proxyModel->setSorting(dolphinView->sorting());
 120     m_proxyModel->setSortOrder(dolphinView->sortOrder());
 121     m_proxyModel->setSortFoldersFirst(dolphinView->sortFoldersFirst());
 122
 123     setModel(m_proxyModel);
 124
 125     connect(KGlobalSettings::self(), SIGNAL(kdisplayFontChanged()),
 126             this, SLOT(updateFont()));
 127
 128     const ViewModeController* viewModeController = m_container->m_viewModeController;
 129     connect(viewModeController, SIGNAL(zoomLevelChanged(int)),
 130             this, SLOT(setZoomLevel(int)));
 131     const QString nameFilter = viewModeController->nameFilter();
 132     if (!nameFilter.isEmpty()) {
 133         m_proxyModel->setFilterFixedString(nameFilter);
 134     }
 135
 136     updateDecorationSize(dolphinView->showPreview());
 137     updateBackground();
 138
 139     DolphinViewController* dolphinViewController = m_container->m_dolphinViewController;
 140     m_extensionsFactory = new ViewExtensionsFactory(this, dolphinViewController, viewModeController);
 141
 142     m_dirLister->openUrl(url, KDirLister::NoFlags);
 143 }
 144
 145 DolphinColumnView::~DolphinColumnView()
 146 {
 147     delete m_proxyModel;
 148     m_proxyModel = 0;
 149     delete m_dolphinModel;
 150     m_dolphinModel = 0;
 151     m_dirLister = 0; // deleted by m_dolphinModel
 152 }
 153
 154 void DolphinColumnView::setActive(bool active)
 155 {
 156     if (m_active != active) {
 157         m_active = active;
 158
 159         if (active) {
 160             activate();
 161         } else {
 162             deactivate();
 163         }
 164     }
 165 }
 166
 167 void DolphinColumnView::updateBackground()
 168 {
 169     // TODO: The alpha-value 150 is copied from DolphinView::setActive(). When
 170     // cleaning up the cut-indication of DolphinColumnView with the code from
 171     // DolphinView a common helper-class should be available which can be shared
 172     // by all view implementations -> no hardcoded value anymore
 173     const QPalette::ColorRole role = viewport()->backgroundRole();
 174     QColor color = viewport()->palette().color(role);
 175     color.setAlpha((m_active && m_container->m_active) ? 255 : 150);
 176
 177     QPalette palette = viewport()->palette();
 178     palette.setColor(role, color);
 179     viewport()->setPalette(palette);
 180
 181     update();
 182 }
 183
 184 KFileItem DolphinColumnView::itemAt(const QPoint& pos) const
 185 {
 186     KFileItem item;
 187     const QModelIndex index = indexAt(pos);
 188     if (index.isValid() && (index.column() == DolphinModel::Name)) {
 189         const QModelIndex dolphinModelIndex = m_proxyModel->mapToSource(index);
 190         item = m_dolphinModel->itemForIndex(dolphinModelIndex);
 191     }
 192     return item;
 193 }
 194
 195 void DolphinColumnView::setSelectionModel(QItemSelectionModel* model)
 196 {
 197     // If a change of the selection is done although the view is not active
 198     // (e. g. by the selection markers), the column must be activated. This
 199     // is done by listening to the current selectionChanged() signal.
 200     if (selectionModel() != 0) {
 201         disconnect(selectionModel(), SIGNAL(selectionChanged(QItemSelection, QItemSelection)),
 202                    this, SLOT(requestActivation()));
 203     }
 204
 205     QListView::setSelectionModel(model);
 206
 207     connect(selectionModel(), SIGNAL(selectionChanged(QItemSelection, QItemSelection)),
 208             this, SLOT(requestActivation()));
 209 }
 210
 211 QStyleOptionViewItem DolphinColumnView::viewOptions() const
 212 {
 213     QStyleOptionViewItem viewOptions = QListView::viewOptions();
 214     viewOptions.font = m_font;
 215     viewOptions.fontMetrics = QFontMetrics(m_font);
 216     viewOptions.decorationSize = m_decorationSize;
 217     viewOptions.showDecorationSelected = true;
 218     return viewOptions;
 219 }
 220
 221 void DolphinColumnView::startDrag(Qt::DropActions supportedActions)
 222 {
 223     DragAndDropHelper::instance().startDrag(this, supportedActions, m_container->m_dolphinViewController);
 224 }
 225
 226 void DolphinColumnView::dragEnterEvent(QDragEnterEvent* event)
 227 {
 228     if (DragAndDropHelper::instance().isMimeDataSupported(event->mimeData())) {
 229         event->acceptProposedAction();
 230         requestActivation();
 231     }
 232 }
 233
 234 void DolphinColumnView::dragLeaveEvent(QDragLeaveEvent* event)
 235 {
 236     QListView::dragLeaveEvent(event);
 237     setDirtyRegion(m_dropRect);
 238 }
 239
 240 void DolphinColumnView::dragMoveEvent(QDragMoveEvent* event)
 241 {
 242     QListView::dragMoveEvent(event);
 243
 244     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 245     const QModelIndex index = indexAt(event->pos());
 246     setDirtyRegion(m_dropRect);
 247
 248     m_dropRect.setSize(QSize()); // set as invalid
 249     if (index.isValid()) {
 250         m_container->m_dolphinViewController->setItemView(this);
 251         const KFileItem item = m_container->m_dolphinViewController->itemForIndex(index);
 252         if (!item.isNull() && item.isDir()) {
 253             m_dropRect = visualRect(index);
 254         }
 255     }
 256     setDirtyRegion(m_dropRect);
 257
 258     if (DragAndDropHelper::instance().isMimeDataSupported(event->mimeData())) {
 259         // accept url drops, independently from the destination item
 260         event->acceptProposedAction();
 261     }
 262 }
 263
 264 void DolphinColumnView::dropEvent(QDropEvent* event)
 265 {
 266     const QModelIndex index = indexAt(event->pos());
 267     m_container->m_dolphinViewController->setItemView(this);
 268     const KFileItem item = m_container->m_dolphinViewController->itemForIndex(index);
 269     m_container->m_dolphinViewController->indicateDroppedUrls(item, url(), event);
 270     QListView::dropEvent(event);
 271 }
 272
 273 void DolphinColumnView::paintEvent(QPaintEvent* event)
 274 {
 275     if (!m_childUrl.isEmpty()) {
 276         // indicate the shown URL of the next column by highlighting the shown folder item
 277         const QModelIndex dirIndex = m_dolphinModel->indexForUrl(m_childUrl);
 278         const QModelIndex proxyIndex = m_proxyModel->mapFromSource(dirIndex);
 279         if (proxyIndex.isValid() && !selectionModel()->isSelected(proxyIndex)) {
 280             const QRect itemRect = visualRect(proxyIndex);
 281             QPainter painter(viewport());
 282             QColor color = KColorScheme(QPalette::Active, KColorScheme::View).foreground().color();
 283             color.setAlpha(32);
 284             painter.setPen(Qt::NoPen);
 285             painter.setBrush(color);
 286             painter.drawRect(itemRect);
 287         }
 288     }
 289
 290     QListView::paintEvent(event);
 291 }
 292
 293 void DolphinColumnView::mousePressEvent(QMouseEvent* event)
 294 {
 295     requestActivation();
 296     if (!indexAt(event->pos()).isValid()) {
 297         if (QApplication::mouseButtons() & Qt::MidButton) {
 298             m_container->m_dolphinViewController->replaceUrlByClipboard();
 299         }
 300     } else if (event->button() == Qt::LeftButton) {
 301         // TODO: see comment in DolphinIconsView::mousePressEvent()
 302         setState(QAbstractItemView::DraggingState);
 303     }
 304     QListView::mousePressEvent(event);
 305 }
 306
 307 void DolphinColumnView::keyPressEvent(QKeyEvent* event)
 308 {
 309     QListView::keyPressEvent(event);
 310
 311     DolphinViewController* controller = m_container->m_dolphinViewController;
 312     controller->handleKeyPressEvent(event);
 313     switch (event->key()) {
 314     case Qt::Key_Right: {
 315         // Special key handling for the column: A Key_Right should
 316         // open a new column for the currently selected folder.
 317         const QModelIndex index = currentIndex();
 318         const KFileItem item = controller->itemForIndex(index);
 319         if (!item.isNull() && item.isDir()) {
 320             controller->emitItemTriggered(item);
 321         }
 322         break;
 323     }
 324
 325     case Qt::Key_Escape:
 326         selectionModel()->setCurrentIndex(selectionModel()->currentIndex(),
 327                                           QItemSelectionModel::Current |
 328                                           QItemSelectionModel::Clear);
 329         break;
 330
 331     default:
 332         break;
 333     }
 334 }
 335
 336 void DolphinColumnView::contextMenuEvent(QContextMenuEvent* event)
 337 {
 338     requestActivation();
 339     QListView::contextMenuEvent(event);
 340     m_container->m_dolphinViewController->triggerContextMenuRequest(event->pos());
 341 }
 342
 343 void DolphinColumnView::wheelEvent(QWheelEvent* event)
 344 {
 345     const int step = m_decorationSize.height();
 346     verticalScrollBar()->setSingleStep(step);
 347     QListView::wheelEvent(event);
 348 }
 349
 350 void DolphinColumnView::leaveEvent(QEvent* event)
 351 {
 352     QListView::leaveEvent(event);
 353     // if the mouse is above an item and moved very fast outside the widget,
 354     // no viewportEntered() signal might be emitted although the mouse has been moved
 355     // above the viewport
 356     m_container->m_dolphinViewController->emitViewportEntered();
 357 }
 358
 359 void DolphinColumnView::currentChanged(const QModelIndex& current, const QModelIndex& previous)
 360 {
 361     QListView::currentChanged(current, previous);
 362     m_extensionsFactory->handleCurrentIndexChange(current, previous);
 363 }
 364
 365 void DolphinColumnView::setZoomLevel(int level)
 366 {
 367     const int size = ZoomLevelInfo::iconSizeForZoomLevel(level);
 368     ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 369
 370     const bool showPreview = m_container->m_dolphinViewController->view()->showPreview();
 371     if (showPreview) {
 372         settings->setPreviewSize(size);
 373     } else {
 374         settings->setIconSize(size);
 375     }
 376
 377     updateDecorationSize(showPreview);
 378 }
 379
 380 void DolphinColumnView::slotEntered(const QModelIndex& index)
 381 {
 382     m_container->m_dolphinViewController->setItemView(this);
 383     m_container->m_dolphinViewController->emitItemEntered(index);
 384 }
 385
 386 void DolphinColumnView::requestActivation()
 387 {
 388     m_container->m_dolphinViewController->requestActivation();
 389     if (!m_active) {
 390         m_container->requestActivation(this);
 391         selectionModel()->clear();
 392     }
 393 }
 394
 395 void DolphinColumnView::updateFont()
 396 {
 397     const ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 398     Q_ASSERT(settings != 0);
 399
 400     if (settings->useSystemFont()) {
 401         m_font = KGlobalSettings::generalFont();
 402     }
 403 }
 404
 405 void DolphinColumnView::slotShowPreviewChanged()
 406 {
 407     const DolphinView* view = m_container->m_dolphinViewController->view();
 408     updateDecorationSize(view->showPreview());
 409 }
 410
 411 void DolphinColumnView::activate()
 412 {
 413     setFocus(Qt::OtherFocusReason);
 414
 415     if (KGlobalSettings::singleClick()) {
 416         connect(this, SIGNAL(clicked(const QModelIndex&)),
 417                 m_container->m_dolphinViewController, SLOT(triggerItem(const QModelIndex&)));
 418     } else {
 419         connect(this, SIGNAL(doubleClicked(const QModelIndex&)),
 420                 m_container->m_dolphinViewController, SLOT(triggerItem(const QModelIndex&)));
 421     }
 422
 423     if (selectionModel() && selectionModel()->currentIndex().isValid()) {
 424         selectionModel()->setCurrentIndex(selectionModel()->currentIndex(), QItemSelectionModel::SelectCurrent);
 425     }
 426
 427     updateBackground();
 428 }
 429
 430 void DolphinColumnView::deactivate()
 431 {
 432     clearFocus();
 433     if (KGlobalSettings::singleClick()) {
 434         disconnect(this, SIGNAL(clicked(const QModelIndex&)),
 435                    m_container->m_dolphinViewController, SLOT(triggerItem(const QModelIndex&)));
 436     } else {
 437         disconnect(this, SIGNAL(doubleClicked(const QModelIndex&)),
 438                    m_container->m_dolphinViewController, SLOT(triggerItem(const QModelIndex&)));
 439     }
 440
 441     // It is important to disconnect the connection to requestActivation() temporary, otherwise the internal
 442     // clearing of the selection would result in activating the column again.
 443     disconnect(selectionModel(), SIGNAL(selectionChanged(QItemSelection, QItemSelection)),
 444                this, SLOT(requestActivation()));
 445     const QModelIndex current = selectionModel()->currentIndex();
 446     selectionModel()->clear();
 447     selectionModel()->setCurrentIndex(current, QItemSelectionModel::NoUpdate);
 448     connect(selectionModel(), SIGNAL(selectionChanged(QItemSelection, QItemSelection)),
 449             this, SLOT(requestActivation()));
 450
 451     updateBackground();
 452 }
 453
 454 void DolphinColumnView::updateDecorationSize(bool showPreview)
 455 {
 456     ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 457     const int iconSize = showPreview ? settings->previewSize() : settings->iconSize();
 458     const QSize size(iconSize, iconSize);
 459     setIconSize(size);
 460
 461     m_decorationSize = size;
 462
 463     doItemsLayout();
 464 }
 465
 466 #include "dolphincolumnview.moc"