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