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 <kicon.h>
  44 #include <kiconeffect.h>
  45 #include <kjob.h>
  46 #include <klocale.h>
  47 #include <konqmimedata.h>
  48
  49 #include <QApplication>
  50 #include <QClipboard>
  51 #include <QHeaderView>
  52 #include <QLabel>
  53 #include <QPainter>
  54 #include <QPoint>
  55 #include <QScrollBar>
  56
  57 DolphinColumnView::DolphinColumnView(QWidget* parent,
  58                                      DolphinColumnViewContainer* container,
  59                                      const KUrl& url) :
  60     DolphinTreeView(parent),
  61     m_active(false),
  62     m_container(container),
  63     m_extensionsFactory(0),
  64     m_url(url),
  65     m_childUrl(),
  66     m_font(),
  67     m_decorationSize(),
  68     m_dirLister(0),
  69     m_dolphinModel(0),
  70     m_proxyModel(0),
  71     m_resizeWidget(0),
  72     m_resizeXOrigin(-1)
  73 {
  74     setMouseTracking(true);
  75     setAcceptDrops(true);
  76     setUniformRowHeights(true);
  77     setSelectionBehavior(SelectItems);
  78     setSelectionMode(QAbstractItemView::ExtendedSelection);
  79     setDragDropMode(QAbstractItemView::DragDrop);
  80     setDropIndicatorShown(false);
  81     setRootIsDecorated(false);
  82     setItemsExpandable(false);
  83     setEditTriggers(QAbstractItemView::NoEditTriggers);
  84     setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOn);
  85
  86     m_resizeWidget = new QLabel(this);
  87     m_resizeWidget->setPixmap(KIcon("transform-move").pixmap(KIconLoader::SizeSmall));
  88     m_resizeWidget->setToolTip(i18nc("@info:tooltip", "Resize column"));
  89     setCornerWidget(m_resizeWidget);
  90     m_resizeWidget->installEventFilter(this);
  91
  92     const ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
  93     Q_ASSERT(settings != 0);
  94
  95     if (settings->useSystemFont()) {
  96         m_font = KGlobalSettings::generalFont();
  97     } else {
  98         m_font = QFont(settings->fontFamily(),
  99                        qRound(settings->fontSize()),
 100                        settings->fontWeight(),
 101                        settings->italicFont());
 102         m_font.setPointSizeF(settings->fontSize());
 103     }
 104
 105     setMinimumWidth(settings->fontSize() * 10);
 106     setMaximumWidth(settings->columnWidth());
 107
 108     connect(this, SIGNAL(viewportEntered()),
 109             m_container->m_dolphinViewController, SLOT(emitViewportEntered()));
 110     connect(this, SIGNAL(entered(const QModelIndex&)),
 111             this, SLOT(slotEntered(const QModelIndex&)));
 112
 113     const DolphinView* dolphinView = m_container->m_dolphinViewController->view();
 114     connect(dolphinView, SIGNAL(showPreviewChanged()),
 115             this, SLOT(slotShowPreviewChanged()));
 116
 117     m_dirLister = new DolphinDirLister();
 118     m_dirLister->setAutoUpdate(true);
 119     m_dirLister->setMainWindow(window());
 120     m_dirLister->setDelayedMimeTypes(true);
 121     const bool showHiddenFiles = m_container->m_dolphinViewController->view()->showHiddenFiles();
 122     m_dirLister->setShowingDotFiles(showHiddenFiles);
 123     connect(m_dirLister, SIGNAL(completed()), this, SLOT(slotDirListerCompleted()));
 124
 125     m_dolphinModel = new DolphinModel(this);
 126     m_dolphinModel->setDirLister(m_dirLister);
 127     m_dolphinModel->setDropsAllowed(DolphinModel::DropOnDirectory);
 128
 129     m_proxyModel = new DolphinSortFilterProxyModel(this);
 130     m_proxyModel->setSourceModel(m_dolphinModel);
 131     m_proxyModel->setFilterCaseSensitivity(Qt::CaseInsensitive);
 132
 133     m_proxyModel->setSorting(dolphinView->sorting());
 134     m_proxyModel->setSortOrder(dolphinView->sortOrder());
 135     m_proxyModel->setSortFoldersFirst(dolphinView->sortFoldersFirst());
 136
 137     setModel(m_proxyModel);
 138
 139     connect(KGlobalSettings::self(), SIGNAL(kdisplayFontChanged()),
 140             this, SLOT(updateFont()));
 141
 142     const ViewModeController* viewModeController = m_container->m_viewModeController;
 143     connect(viewModeController, SIGNAL(zoomLevelChanged(int)),
 144             this, SLOT(setZoomLevel(int)));
 145     const QString nameFilter = viewModeController->nameFilter();
 146     if (!nameFilter.isEmpty()) {
 147         m_proxyModel->setFilterFixedString(nameFilter);
 148     }
 149
 150     updateDecorationSize(dolphinView->showPreview());
 151     updateBackground();
 152
 153     DolphinViewController* dolphinViewController = m_container->m_dolphinViewController;
 154     m_extensionsFactory = new ViewExtensionsFactory(this, dolphinViewController, viewModeController);
 155     m_extensionsFactory->fileItemDelegate()->setMinimizedNameColumn(true);
 156
 157     m_dirLister->openUrl(url, KDirLister::NoFlags);
 158 }
 159
 160 DolphinColumnView::~DolphinColumnView()
 161 {
 162     delete m_proxyModel;
 163     m_proxyModel = 0;
 164     delete m_dolphinModel;
 165     m_dolphinModel = 0;
 166     m_dirLister = 0; // deleted by m_dolphinModel
 167 }
 168
 169 void DolphinColumnView::setActive(bool active)
 170 {
 171     if (m_active != active) {
 172         m_active = active;
 173
 174         if (active) {
 175             activate();
 176         } else {
 177             deactivate();
 178         }
 179     }
 180 }
 181
 182 void DolphinColumnView::updateBackground()
 183 {
 184     // TODO: The alpha-value 150 is copied from DolphinView::setActive(). When
 185     // cleaning up the cut-indication of DolphinColumnView with the code from
 186     // DolphinView a common helper-class should be available which can be shared
 187     // by all view implementations -> no hardcoded value anymore
 188     const QPalette::ColorRole role = viewport()->backgroundRole();
 189     QColor color = viewport()->palette().color(role);
 190     color.setAlpha((m_active && m_container->m_active) ? 255 : 150);
 191
 192     QPalette palette = viewport()->palette();
 193     palette.setColor(role, color);
 194     viewport()->setPalette(palette);
 195
 196     update();
 197 }
 198
 199 KFileItem DolphinColumnView::itemAt(const QPoint& pos) const
 200 {
 201     KFileItem item;
 202     const QModelIndex index = indexAt(pos);
 203     if (index.isValid() && (index.column() == DolphinModel::Name)) {
 204         const QModelIndex dolphinModelIndex = m_proxyModel->mapToSource(index);
 205         item = m_dolphinModel->itemForIndex(dolphinModelIndex);
 206     }
 207     return item;
 208 }
 209
 210 void DolphinColumnView::setSelectionModel(QItemSelectionModel* model)
 211 {
 212     // If a change of the selection is done although the view is not active
 213     // (e. g. by the selection markers), the column must be activated. This
 214     // is done by listening to the current selectionChanged() signal.
 215     if (selectionModel() != 0) {
 216         disconnect(selectionModel(), SIGNAL(selectionChanged(QItemSelection, QItemSelection)),
 217                    this, SLOT(requestActivation()));
 218     }
 219
 220     DolphinTreeView::setSelectionModel(model);
 221
 222     connect(selectionModel(), SIGNAL(selectionChanged(QItemSelection, QItemSelection)),
 223             this, SLOT(requestActivation()));
 224 }
 225
 226 QStyleOptionViewItem DolphinColumnView::viewOptions() const
 227 {
 228     QStyleOptionViewItem viewOptions = DolphinTreeView::viewOptions();
 229     viewOptions.font = m_font;
 230     viewOptions.fontMetrics = QFontMetrics(m_font);
 231     viewOptions.decorationSize = m_decorationSize;
 232     viewOptions.showDecorationSelected = true;
 233     return viewOptions;
 234 }
 235
 236 bool DolphinColumnView::event(QEvent* event)
 237 {
 238     if (event->type() == QEvent::Polish) {
 239         // Hide all columns except of the 'Name' column
 240         for (int i = DolphinModel::Name + 1; i < DolphinModel::ExtraColumnCount; ++i) {
 241             hideColumn(i);
 242         }
 243         header()->hide();
 244     }
 245
 246     return DolphinTreeView::event(event);
 247 }
 248
 249 void DolphinColumnView::startDrag(Qt::DropActions supportedActions)
 250 {
 251     DragAndDropHelper::instance().startDrag(this, supportedActions, m_container->m_dolphinViewController);
 252     DolphinTreeView::startDrag(supportedActions);
 253 }
 254
 255 void DolphinColumnView::dragEnterEvent(QDragEnterEvent* event)
 256 {
 257     if (DragAndDropHelper::instance().isMimeDataSupported(event->mimeData())) {
 258         event->acceptProposedAction();
 259         requestActivation();
 260     }
 261     DolphinTreeView::dragEnterEvent(event);
 262 }
 263
 264 void DolphinColumnView::dragMoveEvent(QDragMoveEvent* event)
 265 {
 266     DolphinTreeView::dragMoveEvent(event);
 267
 268     if (DragAndDropHelper::instance().isMimeDataSupported(event->mimeData())) {
 269         // accept url drops, independently from the destination item
 270         event->acceptProposedAction();
 271     }
 272 }
 273
 274 void DolphinColumnView::dropEvent(QDropEvent* event)
 275 {
 276     const QModelIndex index = indexAt(event->pos());
 277     m_container->m_dolphinViewController->setItemView(this);
 278     const QModelIndex dolphinModelIndex = m_proxyModel->mapToSource(index);
 279     const KFileItem item = m_dolphinModel->itemForIndex(dolphinModelIndex);
 280     m_container->m_dolphinViewController->indicateDroppedUrls(item, url(), event);
 281     DolphinTreeView::dropEvent(event);
 282 }
 283
 284 void DolphinColumnView::paintEvent(QPaintEvent* event)
 285 {
 286     if (!m_childUrl.isEmpty()) {
 287         // Indicate the shown URL of the next column by highlighting the shown folder item
 288         const QModelIndex dirIndex = m_dolphinModel->indexForUrl(m_childUrl);
 289         const QModelIndex proxyIndex = m_proxyModel->mapFromSource(dirIndex);
 290         if (proxyIndex.isValid() && !selectionModel()->isSelected(proxyIndex)) {
 291             QPainter painter(viewport());
 292
 293             QStyleOptionViewItemV4 option;
 294             option.initFrom(this);
 295             option.rect = visualRect(proxyIndex);
 296             option.state = QStyle::State_Enabled | QStyle::State_HasFocus;
 297             option.viewItemPosition = QStyleOptionViewItemV4::OnlyOne;
 298             style()->drawPrimitive(QStyle::PE_FrameFocusRect, &option, &painter, this);
 299         }
 300     }
 301
 302     DolphinTreeView::paintEvent(event);
 303 }
 304
 305 void DolphinColumnView::mousePressEvent(QMouseEvent* event)
 306 {
 307     requestActivation();
 308     if (!indexAt(event->pos()).isValid() && (QApplication::mouseButtons() & Qt::MidButton)) {
 309         m_container->m_dolphinViewController->replaceUrlByClipboard();
 310     }
 311
 312     DolphinTreeView::mousePressEvent(event);
 313 }
 314
 315 void DolphinColumnView::keyPressEvent(QKeyEvent* event)
 316 {
 317     DolphinTreeView::keyPressEvent(event);
 318
 319     DolphinViewController* controller = m_container->m_dolphinViewController;
 320     controller->handleKeyPressEvent(event);
 321     switch (event->key()) {
 322     case Qt::Key_Right: {
 323         // Special key handling for the column: A Key_Right should
 324         // open a new column for the currently selected folder.
 325         const QModelIndex dolphinModelIndex = m_proxyModel->mapToSource(currentIndex());
 326         const KFileItem item = m_dolphinModel->itemForIndex(dolphinModelIndex);
 327         if (!item.isNull() && item.isDir()) {
 328             controller->emitItemTriggered(item);
 329         }
 330         break;
 331     }
 332
 333     case Qt::Key_Escape:
 334         selectionModel()->setCurrentIndex(selectionModel()->currentIndex(),
 335                                           QItemSelectionModel::Current |
 336                                           QItemSelectionModel::Clear);
 337         break;
 338
 339     default:
 340         break;
 341     }
 342 }
 343
 344 void DolphinColumnView::contextMenuEvent(QContextMenuEvent* event)
 345 {
 346     requestActivation();
 347     DolphinTreeView::contextMenuEvent(event);
 348     m_container->m_dolphinViewController->triggerContextMenuRequest(event->pos());
 349 }
 350
 351 void DolphinColumnView::wheelEvent(QWheelEvent* event)
 352 {
 353     const int step = m_decorationSize.height();
 354     verticalScrollBar()->setSingleStep(step);
 355     DolphinTreeView::wheelEvent(event);
 356 }
 357
 358 void DolphinColumnView::leaveEvent(QEvent* event)
 359 {
 360     DolphinTreeView::leaveEvent(event);
 361     // if the mouse is above an item and moved very fast outside the widget,
 362     // no viewportEntered() signal might be emitted although the mouse has been moved
 363     // above the viewport
 364     m_container->m_dolphinViewController->emitViewportEntered();
 365 }
 366
 367 void DolphinColumnView::currentChanged(const QModelIndex& current, const QModelIndex& previous)
 368 {
 369     DolphinTreeView::currentChanged(current, previous);
 370     m_extensionsFactory->handleCurrentIndexChange(current, previous);
 371 }
 372
 373 QRect DolphinColumnView::visualRect(const QModelIndex& index) const
 374 {
 375     QRect rect = DolphinTreeView::visualRect(index);
 376
 377     const QModelIndex dolphinModelIndex = m_proxyModel->mapToSource(index);
 378     const KFileItem item = m_dolphinModel->itemForIndex(dolphinModelIndex);
 379     if (!item.isNull()) {
 380         const int width = DolphinFileItemDelegate::nameColumnWidth(item.text(), viewOptions());
 381         rect.setWidth(width);
 382     }
 383
 384     return rect;
 385 }
 386
 387 bool DolphinColumnView::acceptsDrop(const QModelIndex& index) const
 388 {
 389     if (index.isValid() && (index.column() == DolphinModel::Name)) {
 390         // Accept drops above directories
 391         const QModelIndex dolphinModelIndex = m_proxyModel->mapToSource(index);
 392         const KFileItem item = m_dolphinModel->itemForIndex(dolphinModelIndex);
 393         return !item.isNull() && item.isDir();
 394     }
 395
 396     return false;
 397 }
 398
 399 bool DolphinColumnView::eventFilter(QObject* watched, QEvent* event)
 400 {
 401     if (watched == m_resizeWidget) {
 402         switch (event->type()) {
 403         case QEvent::MouseButtonPress: {
 404             // Initiate the resizing of the column
 405             QMouseEvent* mouseEvent = static_cast<QMouseEvent*>(event);
 406             m_resizeXOrigin = mouseEvent->globalX();
 407             m_resizeWidget->setMouseTracking(true);
 408             event->accept();
 409             return true;
 410         }
 411
 412         case QEvent::MouseButtonDblClick: {
 413             // Reset the column width to the default value
 414             const ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 415             setMaximumWidth(settings->columnWidth());
 416             m_container->layoutColumns();
 417             m_resizeWidget->setMouseTracking(false);
 418             m_resizeXOrigin = -1;
 419             event->accept();
 420             return true;
 421         }
 422
 423         case QEvent::MouseMove: {
 424             // Resize the column and trigger a relayout of the container
 425             QMouseEvent* mouseEvent = static_cast<QMouseEvent*>(event);
 426             int requestedWidth = maximumWidth() - m_resizeXOrigin + mouseEvent->globalX();;
 427             if (requestedWidth < minimumWidth()) {
 428                 requestedWidth = minimumWidth();
 429             }
 430             setMaximumWidth(requestedWidth);
 431
 432             m_container->layoutColumns();
 433
 434             m_resizeXOrigin = mouseEvent->globalX();
 435
 436             event->accept();
 437             return true;
 438         }
 439
 440         case QEvent::MouseButtonRelease: {
 441             // The resizing has been finished
 442             m_resizeWidget->setMouseTracking(false);
 443             m_resizeXOrigin = -1;
 444             event->accept();
 445             return true;
 446         }
 447
 448         default:
 449             break;
 450         }
 451     }
 452     return DolphinTreeView::eventFilter(watched, event);
 453 }
 454 void DolphinColumnView::setZoomLevel(int level)
 455 {
 456     const int size = ZoomLevelInfo::iconSizeForZoomLevel(level);
 457     ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 458
 459     const bool showPreview = m_container->m_dolphinViewController->view()->showPreview();
 460     if (showPreview) {
 461         settings->setPreviewSize(size);
 462     } else {
 463         settings->setIconSize(size);
 464     }
 465
 466     updateDecorationSize(showPreview);
 467 }
 468
 469 void DolphinColumnView::slotEntered(const QModelIndex& index)
 470 {
 471     m_container->m_dolphinViewController->setItemView(this);
 472     m_container->m_dolphinViewController->emitItemEntered(index);
 473 }
 474
 475 void DolphinColumnView::requestActivation()
 476 {
 477     m_container->m_dolphinViewController->requestActivation();
 478     if (!m_active) {
 479         m_container->requestActivation(this);
 480         selectionModel()->clear();
 481     }
 482 }
 483
 484 void DolphinColumnView::updateFont()
 485 {
 486     const ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 487     Q_ASSERT(settings != 0);
 488
 489     if (settings->useSystemFont()) {
 490         m_font = KGlobalSettings::generalFont();
 491     }
 492 }
 493
 494 void DolphinColumnView::slotShowPreviewChanged()
 495 {
 496     const DolphinView* view = m_container->m_dolphinViewController->view();
 497     updateDecorationSize(view->showPreview());
 498 }
 499
 500 void DolphinColumnView::slotDirListerCompleted()
 501 {
 502     if (!m_childUrl.isEmpty()) {
 503         return;
 504     }
 505
 506     // Try to optimize the width of the column, so that no name gets clipped
 507     const int requiredWidth = sizeHintForColumn(DolphinModel::Name);
 508
 509     const ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 510     if (requiredWidth > settings->columnWidth()) {
 511         int frameAroundContents = 0;
 512         if (style()->styleHint(QStyle::SH_ScrollView_FrameOnlyAroundContents)) {
 513             // TODO: Using 2 PM_DefaultFrameWidths are not sufficient. Check Qt-code
 514             // for other pixelmetrics that should be added...
 515             frameAroundContents = style()->pixelMetric(QStyle::PM_DefaultFrameWidth) * 4;
 516         }
 517
 518         const int scrollBarWidth = style()->pixelMetric(QStyle::PM_ScrollBarExtent, 0, verticalScrollBar());
 519
 520         setMaximumWidth(requiredWidth + frameAroundContents + scrollBarWidth);
 521         m_container->layoutColumns();
 522         if (m_active) {
 523             m_container->assureVisibleActiveColumn();
 524         }
 525     }
 526 }
 527
 528 void DolphinColumnView::activate()
 529 {
 530     setFocus(Qt::OtherFocusReason);
 531
 532     if (KGlobalSettings::singleClick()) {
 533         connect(this, SIGNAL(clicked(const QModelIndex&)),
 534                 m_container->m_dolphinViewController, SLOT(triggerItem(const QModelIndex&)));
 535     } else {
 536         connect(this, SIGNAL(doubleClicked(const QModelIndex&)),
 537                 m_container->m_dolphinViewController, SLOT(triggerItem(const QModelIndex&)));
 538     }
 539
 540     if (selectionModel() && selectionModel()->currentIndex().isValid()) {
 541         selectionModel()->setCurrentIndex(selectionModel()->currentIndex(), QItemSelectionModel::SelectCurrent);
 542     }
 543
 544     updateBackground();
 545 }
 546
 547 void DolphinColumnView::deactivate()
 548 {
 549     clearFocus();
 550     if (KGlobalSettings::singleClick()) {
 551         disconnect(this, SIGNAL(clicked(const QModelIndex&)),
 552                    m_container->m_dolphinViewController, SLOT(triggerItem(const QModelIndex&)));
 553     } else {
 554         disconnect(this, SIGNAL(doubleClicked(const QModelIndex&)),
 555                    m_container->m_dolphinViewController, SLOT(triggerItem(const QModelIndex&)));
 556     }
 557
 558     // It is important to disconnect the connection to requestActivation() temporary, otherwise the internal
 559     // clearing of the selection would result in activating the column again.
 560     disconnect(selectionModel(), SIGNAL(selectionChanged(QItemSelection, QItemSelection)),
 561                this, SLOT(requestActivation()));
 562     const QModelIndex current = selectionModel()->currentIndex();
 563     selectionModel()->clear();
 564     selectionModel()->setCurrentIndex(current, QItemSelectionModel::NoUpdate);
 565     connect(selectionModel(), SIGNAL(selectionChanged(QItemSelection, QItemSelection)),
 566             this, SLOT(requestActivation()));
 567
 568     updateBackground();
 569 }
 570
 571 void DolphinColumnView::updateDecorationSize(bool showPreview)
 572 {
 573     ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 574     const int iconSize = showPreview ? settings->previewSize() : settings->iconSize();
 575     const QSize size(iconSize, iconSize);
 576     setIconSize(size);
 577
 578     m_decorationSize = size;
 579
 580     doItemsLayout();
 581 }
 582
 583 #include "dolphincolumnview.moc"