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     m_extensionsFactory = new ViewExtensionsFactory(this, controller);
 138 }
 139
 140 DolphinColumnView::~DolphinColumnView()
 141 {
 142     delete m_proxyModel;
 143     m_proxyModel = 0;
 144     delete m_dolphinModel;
 145     m_dolphinModel = 0;
 146     m_dirLister = 0; // deleted by m_dolphinModel
 147 }
 148
 149 void DolphinColumnView::setActive(bool active)
 150 {
 151     if (active && (m_container->focusProxy() != this)) {
 152         m_container->setFocusProxy(this);
 153     }
 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     QListView::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 = QListView::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 void DolphinColumnView::startDrag(Qt::DropActions supportedActions)
 221 {
 222     DragAndDropHelper::instance().startDrag(this, supportedActions, m_container->m_controller);
 223 }
 224
 225 void DolphinColumnView::dragEnterEvent(QDragEnterEvent* event)
 226 {
 227     if (DragAndDropHelper::instance().isMimeDataSupported(event->mimeData())) {
 228         event->acceptProposedAction();
 229         requestActivation();
 230     }
 231 }
 232
 233 void DolphinColumnView::dragLeaveEvent(QDragLeaveEvent* event)
 234 {
 235     QListView::dragLeaveEvent(event);
 236     setDirtyRegion(m_dropRect);
 237 }
 238
 239 void DolphinColumnView::dragMoveEvent(QDragMoveEvent* event)
 240 {
 241     QListView::dragMoveEvent(event);
 242
 243     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 244     const QModelIndex index = indexAt(event->pos());
 245     setDirtyRegion(m_dropRect);
 246
 247     m_dropRect.setSize(QSize()); // set as invalid
 248     if (index.isValid()) {
 249         m_container->m_controller->setItemView(this);
 250         const KFileItem item = m_container->m_controller->itemForIndex(index);
 251         if (!item.isNull() && item.isDir()) {
 252             m_dropRect = visualRect(index);
 253         }
 254     }
 255     setDirtyRegion(m_dropRect);
 256
 257     if (DragAndDropHelper::instance().isMimeDataSupported(event->mimeData())) {
 258         // accept url drops, independently from the destination item
 259         event->acceptProposedAction();
 260     }
 261 }
 262
 263 void DolphinColumnView::dropEvent(QDropEvent* event)
 264 {
 265     const QModelIndex index = indexAt(event->pos());
 266     m_container->m_controller->setItemView(this);
 267     const KFileItem item = m_container->m_controller->itemForIndex(index);
 268     m_container->m_controller->indicateDroppedUrls(item, url(), event);
 269     QListView::dropEvent(event);
 270 }
 271
 272 void DolphinColumnView::paintEvent(QPaintEvent* event)
 273 {
 274     if (!m_childUrl.isEmpty()) {
 275         // indicate the shown URL of the next column by highlighting the shown folder item
 276         const QModelIndex dirIndex = m_dolphinModel->indexForUrl(m_childUrl);
 277         const QModelIndex proxyIndex = m_proxyModel->mapFromSource(dirIndex);
 278         if (proxyIndex.isValid() && !selectionModel()->isSelected(proxyIndex)) {
 279             const QRect itemRect = visualRect(proxyIndex);
 280             QPainter painter(viewport());
 281             QColor color = KColorScheme(QPalette::Active, KColorScheme::View).foreground().color();
 282             color.setAlpha(32);
 283             painter.setPen(Qt::NoPen);
 284             painter.setBrush(color);
 285             painter.drawRect(itemRect);
 286         }
 287     }
 288
 289     QListView::paintEvent(event);
 290 }
 291
 292 void DolphinColumnView::mousePressEvent(QMouseEvent* event)
 293 {
 294     requestActivation();
 295     if (!indexAt(event->pos()).isValid()) {
 296         if (QApplication::mouseButtons() & Qt::MidButton) {
 297             m_container->m_controller->replaceUrlByClipboard();
 298         }
 299     } else if (event->button() == Qt::LeftButton) {
 300         // TODO: see comment in DolphinIconsView::mousePressEvent()
 301         setState(QAbstractItemView::DraggingState);
 302     }
 303     QListView::mousePressEvent(event);
 304 }
 305
 306 void DolphinColumnView::keyPressEvent(QKeyEvent* event)
 307 {
 308     QListView::keyPressEvent(event);
 309     requestActivation();
 310
 311     DolphinController* controller = m_container->m_controller;
 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_controller->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_controller->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_controller->dolphinView()->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_controller->setItemView(this);
 383     m_container->m_controller->emitItemEntered(index);
 384 }
 385
 386 void DolphinColumnView::requestActivation()
 387 {
 388     if (!m_active) {
 389         m_container->requestActivation(this);
 390         selectionModel()->clear();
 391     }
 392 }
 393
 394 void DolphinColumnView::updateFont()
 395 {
 396     const ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 397     Q_ASSERT(settings != 0);
 398
 399     if (settings->useSystemFont()) {
 400         m_font = KGlobalSettings::generalFont();
 401     }
 402 }
 403
 404 void DolphinColumnView::slotShowPreviewChanged()
 405 {
 406     const DolphinView* view = m_container->m_controller->dolphinView();
 407     updateDecorationSize(view->showPreview());
 408 }
 409
 410 void DolphinColumnView::activate()
 411 {
 412     setFocus(Qt::OtherFocusReason);
 413
 414     if (KGlobalSettings::singleClick()) {
 415         connect(this, SIGNAL(clicked(const QModelIndex&)),
 416                 m_container->m_controller, SLOT(triggerItem(const QModelIndex&)));
 417     } else {
 418         connect(this, SIGNAL(doubleClicked(const QModelIndex&)),
 419                 m_container->m_controller, SLOT(triggerItem(const QModelIndex&)));
 420     }
 421
 422     if (selectionModel() && selectionModel()->currentIndex().isValid()) {
 423         selectionModel()->setCurrentIndex(selectionModel()->currentIndex(), QItemSelectionModel::SelectCurrent);
 424     }
 425
 426     updateBackground();
 427 }
 428
 429 void DolphinColumnView::deactivate()
 430 {
 431     clearFocus();
 432     if (KGlobalSettings::singleClick()) {
 433         disconnect(this, SIGNAL(clicked(const QModelIndex&)),
 434                    m_container->m_controller, SLOT(triggerItem(const QModelIndex&)));
 435     } else {
 436         disconnect(this, SIGNAL(doubleClicked(const QModelIndex&)),
 437                    m_container->m_controller, SLOT(triggerItem(const QModelIndex&)));
 438     }
 439
 440     const QModelIndex current = selectionModel()->currentIndex();
 441     selectionModel()->clear();
 442     selectionModel()->setCurrentIndex(current, QItemSelectionModel::NoUpdate);
 443     updateBackground();
 444 }
 445
 446 void DolphinColumnView::updateDecorationSize(bool showPreview)
 447 {
 448     ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 449     const int iconSize = showPreview ? settings->previewSize() : settings->iconSize();
 450     const QSize size(iconSize, iconSize);
 451     setIconSize(size);
 452
 453     m_decorationSize = size;
 454
 455     doItemsLayout();
 456 }
 457
 458 #include "dolphincolumnview.moc"