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