src/dolphindetailsview.cpp

   1 /***************************************************************************
   2  *   Copyright (C) 2006 by Peter Penz                                      *
   3  *   peter.penz@gmx.at                                                     *
   4  *                                                                         *
   5  *   This program is free software; you can redistribute it and/or modify  *
   6  *   it under the terms of the GNU General Public License as published by  *
   7  *   the Free Software Foundation; either version 2 of the License, or     *
   8  *   (at your option) any later version.                                   *
   9  *                                                                         *
  10  *   This program is distributed in the hope that it will be useful,       *
  11  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  12  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  13  *   GNU General Public License for more details.                          *
  14  *                                                                         *
  15  *   You should have received a copy of the GNU General Public License     *
  16  *   along with this program; if not, write to the                         *
  17  *   Free Software Foundation, Inc.,                                       *
  18  *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA            *
  19  ***************************************************************************/
  20
  21 #include "dolphindetailsview.h"
  22
  23 #include "dolphinmodel.h"
  24 #include "dolphincontroller.h"
  25 #include "dolphinsettings.h"
  26 #include "dolphinsortfilterproxymodel.h"
  27 #include "viewproperties.h"
  28
  29 #include "dolphin_detailsmodesettings.h"
  30
  31 #include <kdirmodel.h>
  32 #include <klocale.h>
  33 #include <kmenu.h>
  34
  35 #include <QAbstractProxyModel>
  36 #include <QAction>
  37 #include <QApplication>
  38 #include <QHeaderView>
  39 #include <QRubberBand>
  40 #include <QPainter>
  41 #include <QScrollBar>
  42
  43 DolphinDetailsView::DolphinDetailsView(QWidget* parent, DolphinController* controller) :
  44     QTreeView(parent),
  45     m_controller(controller),
  46     m_dragging(false),
  47     m_showElasticBand(false),
  48     m_elasticBandOrigin(),
  49     m_elasticBandDestination()
  50 {
  51     Q_ASSERT(controller != 0);
  52
  53     setAcceptDrops(true);
  54     setRootIsDecorated(false);
  55     setSortingEnabled(true);
  56     setUniformRowHeights(true);
  57     setSelectionBehavior(SelectItems);
  58     setDragDropMode(QAbstractItemView::DragDrop);
  59     setDropIndicatorShown(false);
  60     setAlternatingRowColors(true);
  61
  62     setMouseTracking(true);
  63     viewport()->setAttribute(Qt::WA_Hover);
  64
  65     const ViewProperties props(controller->url());
  66     setSortIndicatorSection(props.sorting());
  67     setSortIndicatorOrder(props.sortOrder());
  68
  69     QHeaderView* headerView = header();
  70     connect(headerView, SIGNAL(sectionClicked(int)),
  71             this, SLOT(synchronizeSortingState(int)));
  72     headerView->setContextMenuPolicy(Qt::CustomContextMenu);
  73     connect(headerView, SIGNAL(customContextMenuRequested(const QPoint&)),
  74             this, SLOT(configureColumns(const QPoint&)));
  75
  76     connect(parent, SIGNAL(sortingChanged(DolphinView::Sorting)),
  77             this, SLOT(setSortIndicatorSection(DolphinView::Sorting)));
  78     connect(parent, SIGNAL(sortOrderChanged(Qt::SortOrder)),
  79             this, SLOT(setSortIndicatorOrder(Qt::SortOrder)));
  80
  81     // TODO: Connecting to the signal 'activated()' is not possible, as kstyle
  82     // does not forward the single vs. doubleclick to it yet (KDE 4.1?). Hence it is
  83     // necessary connecting the signal 'singleClick()' or 'doubleClick' and to handle the
  84     // RETURN-key in keyPressEvent().
  85     if (KGlobalSettings::singleClick()) {
  86         connect(this, SIGNAL(clicked(const QModelIndex&)),
  87                 this, SLOT(triggerItem(const QModelIndex&)));
  88     } else {
  89         connect(this, SIGNAL(doubleClicked(const QModelIndex&)),
  90                 this, SLOT(triggerItem(const QModelIndex&)));
  91     }
  92     connect(this, SIGNAL(entered(const QModelIndex&)),
  93             this, SLOT(slotEntered(const QModelIndex&)));
  94     connect(this, SIGNAL(viewportEntered()),
  95             controller, SLOT(emitViewportEntered()));
  96     connect(controller, SIGNAL(zoomIn()),
  97             this, SLOT(zoomIn()));
  98     connect(controller, SIGNAL(zoomOut()),
  99             this, SLOT(zoomOut()));
 100     connect(controller->dolphinView(), SIGNAL(additionalInfoChanged(const KFileItemDelegate::InformationList&)),
 101             this, SLOT(updateColumnVisibility()));
 102
 103     // apply the details mode settings to the widget
 104     const DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 105     Q_ASSERT(settings != 0);
 106
 107     m_viewOptions = QTreeView::viewOptions();
 108
 109     QFont font(settings->fontFamily(), settings->fontSize());
 110     font.setItalic(settings->italicFont());
 111     font.setBold(settings->boldFont());
 112     m_viewOptions.font = font;
 113     m_viewOptions.showDecorationSelected = true;
 114
 115 // TODO: Remove this check when 4.3.2 is released and KDE requires it... this
 116 //       check avoids a division by zero happening on versions before 4.3.1.
 117 //       Right now KDE in theory can be shipped with Qt 4.3.0 and above.
 118 //       ereslibre
 119 #if (QT_VERSION >= QT_VERSION_CHECK(4, 3, 2) || defined(QT_KDE_QT_COPY))
 120     setVerticalScrollMode(QTreeView::ScrollPerPixel);
 121     setHorizontalScrollMode(QTreeView::ScrollPerPixel);
 122 #endif
 123
 124     updateDecorationSize();
 125
 126     setFocus();
 127 }
 128
 129 DolphinDetailsView::~DolphinDetailsView()
 130 {
 131 }
 132
 133 bool DolphinDetailsView::event(QEvent* event)
 134 {
 135     if (event->type() == QEvent::Polish) {
 136         // Assure that by respecting the available width that:
 137         // - the 'Name' column is stretched as large as possible
 138         // - the remaining columns are as small as possible
 139         QHeaderView* headerView = header();
 140         headerView->setStretchLastSection(false);
 141         headerView->setResizeMode(QHeaderView::ResizeToContents);
 142         headerView->setResizeMode(0, QHeaderView::Stretch);
 143         headerView->setMovable(false);
 144
 145         updateColumnVisibility();
 146
 147         hideColumn(DolphinModel::Rating);
 148         hideColumn(DolphinModel::Tags);
 149     }
 150 // TODO: Remove this check when 4.3.2 is released and KDE requires it... this
 151 //       check avoids a division by zero happening on versions before 4.3.1.
 152 //       Right now KDE in theory can be shipped with Qt 4.3.0 and above.
 153 //       ereslibre
 154 #if (QT_VERSION >= QT_VERSION_CHECK(4, 3, 2) || defined(QT_KDE_QT_COPY))
 155     else if (event->type() == QEvent::UpdateRequest) {
 156         // a wheel movement will scroll 4 items
 157         if (model()->rowCount() > 0) {
 158             verticalScrollBar()->setSingleStep((sizeHintForRow(0) / 3) * 4);
 159         }
 160     }
 161 #endif
 162
 163     return QTreeView::event(event);
 164 }
 165
 166 QStyleOptionViewItem DolphinDetailsView::viewOptions() const
 167 {
 168     return m_viewOptions;
 169 }
 170
 171 void DolphinDetailsView::contextMenuEvent(QContextMenuEvent* event)
 172 {
 173     QTreeView::contextMenuEvent(event);
 174     m_controller->triggerContextMenuRequest(event->pos());
 175 }
 176
 177 void DolphinDetailsView::mousePressEvent(QMouseEvent* event)
 178 {
 179     m_controller->requestActivation();
 180
 181     QTreeView::mousePressEvent(event);
 182
 183     const QModelIndex index = indexAt(event->pos());
 184     if (!index.isValid() || (index.column() != DolphinModel::Name)) {
 185         const Qt::KeyboardModifiers modifier = QApplication::keyboardModifiers();
 186         if (!(modifier & Qt::ShiftModifier) && !(modifier & Qt::ControlModifier)) {
 187             clearSelection();
 188         }
 189     }
 190
 191     if (event->button() == Qt::LeftButton) {
 192         m_showElasticBand = true;
 193
 194         const QPoint pos(contentsPos());
 195         m_elasticBandOrigin = event->pos();
 196         m_elasticBandOrigin.setX(m_elasticBandOrigin.x() + pos.x());
 197         m_elasticBandOrigin.setY(m_elasticBandOrigin.y() + pos.y());
 198         m_elasticBandDestination = event->pos();
 199     }
 200 }
 201
 202 void DolphinDetailsView::mouseMoveEvent(QMouseEvent* event)
 203 {
 204     QTreeView::mouseMoveEvent(event);
 205     if (m_showElasticBand) {
 206         updateElasticBand();
 207     }
 208 }
 209
 210 void DolphinDetailsView::mouseReleaseEvent(QMouseEvent* event)
 211 {
 212     QTreeView::mouseReleaseEvent(event);
 213     if (m_showElasticBand) {
 214         updateElasticBand();
 215         m_showElasticBand = false;
 216     }
 217 }
 218
 219 void DolphinDetailsView::dragEnterEvent(QDragEnterEvent* event)
 220 {
 221     if (event->mimeData()->hasUrls()) {
 222         event->acceptProposedAction();
 223     }
 224
 225     if (m_showElasticBand) {
 226         updateElasticBand();
 227         m_showElasticBand = false;
 228     }
 229     m_dragging = true;
 230 }
 231
 232 void DolphinDetailsView::dragLeaveEvent(QDragLeaveEvent* event)
 233 {
 234     QTreeView::dragLeaveEvent(event);
 235
 236     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 237     m_dragging = false;
 238     setDirtyRegion(m_dropRect);
 239 }
 240
 241 void DolphinDetailsView::dragMoveEvent(QDragMoveEvent* event)
 242 {
 243     QTreeView::dragMoveEvent(event);
 244
 245     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 246     setDirtyRegion(m_dropRect);
 247     const QModelIndex index = indexAt(event->pos());
 248     if (!index.isValid() || (index.column() != DolphinModel::Name)) {
 249         m_dragging = false;
 250     } else {
 251         m_dragging = true;
 252         m_dropRect = visualRect(index);
 253         setDirtyRegion(m_dropRect);
 254     }
 255 }
 256
 257 void DolphinDetailsView::dropEvent(QDropEvent* event)
 258 {
 259     const KUrl::List urls = KUrl::List::fromMimeData(event->mimeData());
 260     if (!urls.isEmpty()) {
 261         event->acceptProposedAction();
 262         const QModelIndex index = indexAt(event->pos());
 263         if (index.isValid() && (index.column() == DolphinModel::Name)) {
 264             const KFileItem item = itemForIndex(index);
 265             m_controller->indicateDroppedUrls(urls,
 266                                               m_controller->url(),
 267                                               item,
 268                                               event->source());
 269         }
 270     }
 271     QTreeView::dropEvent(event);
 272     m_dragging = false;
 273 }
 274
 275 void DolphinDetailsView::paintEvent(QPaintEvent* event)
 276 {
 277     QTreeView::paintEvent(event);
 278     if (m_showElasticBand) {
 279         // The following code has been taken from QListView
 280         // and adapted to DolphinDetailsView.
 281         // (C) 1992-2007 Trolltech ASA
 282         QStyleOptionRubberBand opt;
 283         opt.initFrom(this);
 284         opt.shape = QRubberBand::Rectangle;
 285         opt.opaque = false;
 286         opt.rect = elasticBandRect();
 287
 288         QPainter painter(viewport());
 289         painter.save();
 290         style()->drawControl(QStyle::CE_RubberBand, &opt, &painter);
 291         painter.restore();
 292     }
 293
 294     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 295     if (m_dragging) {
 296         const QBrush& brush = m_viewOptions.palette.brush(QPalette::Normal, QPalette::Highlight);
 297         DolphinController::drawHoverIndication(viewport(), m_dropRect, brush);
 298     }
 299 }
 300
 301 void DolphinDetailsView::keyPressEvent(QKeyEvent* event)
 302 {
 303     QTreeView::keyPressEvent(event);
 304
 305     const QItemSelectionModel* selModel = selectionModel();
 306     const QModelIndex currentIndex = selModel->currentIndex();
 307     const bool trigger = currentIndex.isValid()
 308                          && (event->key() == Qt::Key_Return)
 309                          && (selModel->selectedIndexes().count() <= 1);
 310     if (trigger) {
 311         triggerItem(currentIndex);
 312     }
 313 }
 314
 315 void DolphinDetailsView::resizeEvent(QResizeEvent* event)
 316 {
 317     QTreeView::resizeEvent(event);
 318
 319     // assure that the width of the name-column does not get too small
 320     const int minWidth = 120;
 321     QHeaderView* headerView = header();
 322     bool useFixedWidth = (headerView->sectionSize(KDirModel::Name) <= minWidth)
 323                          && (headerView->resizeMode(0) != QHeaderView::Fixed);
 324     if (useFixedWidth) {
 325         // the current width of the name-column is too small, hence
 326         // use a fixed size
 327         headerView->setResizeMode(QHeaderView::Fixed);
 328         headerView->setResizeMode(0, QHeaderView::Fixed);
 329         headerView->resizeSection(KDirModel::Name, minWidth);
 330     } else if (headerView->resizeMode(0) != QHeaderView::Stretch) {
 331         // check whether there is enough available viewport width
 332         // to automatically resize the columns
 333         const int availableWidth = viewport()->width();
 334
 335         int headerWidth = 0;
 336         const int count = headerView->count();
 337         for (int i = 0; i < count; ++i) {
 338             headerWidth += headerView->sectionSize(i);
 339         }
 340
 341         if (headerWidth < availableWidth) {
 342             headerView->setResizeMode(QHeaderView::ResizeToContents);
 343             headerView->setResizeMode(0, QHeaderView::Stretch);
 344         }
 345     }
 346 }
 347
 348 void DolphinDetailsView::setSortIndicatorSection(DolphinView::Sorting sorting)
 349 {
 350     QHeaderView* headerView = header();
 351     headerView->setSortIndicator(sorting, headerView->sortIndicatorOrder());
 352 }
 353
 354 void DolphinDetailsView::setSortIndicatorOrder(Qt::SortOrder sortOrder)
 355 {
 356     QHeaderView* headerView = header();
 357     headerView->setSortIndicator(headerView->sortIndicatorSection(), sortOrder);
 358 }
 359
 360 void DolphinDetailsView::synchronizeSortingState(int column)
 361 {
 362     // The sorting has already been changed in QTreeView if this slot is
 363     // invoked, but Dolphin is not informed about this.
 364     DolphinView::Sorting sorting = DolphinSortFilterProxyModel::sortingForColumn(column);
 365     const Qt::SortOrder sortOrder = header()->sortIndicatorOrder();
 366     m_controller->indicateSortingChange(sorting);
 367     m_controller->indicateSortOrderChange(sortOrder);
 368 }
 369
 370 void DolphinDetailsView::slotEntered(const QModelIndex& index)
 371 {
 372     const QPoint pos = viewport()->mapFromGlobal(QCursor::pos());
 373     const int nameColumnWidth = header()->sectionSize(DolphinModel::Name);
 374     if (pos.x() < nameColumnWidth) {
 375         m_controller->emitItemEntered(itemForIndex(index));
 376     }
 377     else {
 378         m_controller->emitViewportEntered();
 379     }
 380 }
 381
 382 void DolphinDetailsView::updateElasticBand()
 383 {
 384     Q_ASSERT(m_showElasticBand);
 385     QRect dirtyRegion(elasticBandRect());
 386     m_elasticBandDestination = viewport()->mapFromGlobal(QCursor::pos());
 387     dirtyRegion = dirtyRegion.united(elasticBandRect());
 388     setDirtyRegion(dirtyRegion);
 389 }
 390
 391 QRect DolphinDetailsView::elasticBandRect() const
 392 {
 393     const QPoint pos(contentsPos());
 394     const QPoint topLeft(m_elasticBandOrigin.x() - pos.x(), m_elasticBandOrigin.y() - pos.y());
 395     return QRect(topLeft, m_elasticBandDestination).normalized();
 396 }
 397
 398 void DolphinDetailsView::zoomIn()
 399 {
 400     if (isZoomInPossible()) {
 401         DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 402         switch (settings->iconSize()) {
 403         case KIconLoader::SizeSmall:  settings->setIconSize(KIconLoader::SizeMedium); break;
 404         case KIconLoader::SizeMedium: settings->setIconSize(KIconLoader::SizeLarge); break;
 405         default: Q_ASSERT(false); break;
 406         }
 407         updateDecorationSize();
 408     }
 409 }
 410
 411 void DolphinDetailsView::zoomOut()
 412 {
 413     if (isZoomOutPossible()) {
 414         DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 415         switch (settings->iconSize()) {
 416         case KIconLoader::SizeLarge:  settings->setIconSize(KIconLoader::SizeMedium); break;
 417         case KIconLoader::SizeMedium: settings->setIconSize(KIconLoader::SizeSmall); break;
 418         default: Q_ASSERT(false); break;
 419         }
 420         updateDecorationSize();
 421     }
 422 }
 423
 424 void DolphinDetailsView::triggerItem(const QModelIndex& index)
 425 {
 426     const KFileItem item = itemForIndex(index);
 427     if (index.isValid() && (index.column() == KDirModel::Name)) {
 428         m_controller->triggerItem(item);
 429     } else {
 430         clearSelection();
 431         m_controller->emitItemEntered(item);
 432     }
 433 }
 434
 435 void DolphinDetailsView::configureColumns(const QPoint& pos)
 436 {
 437     KMenu popup(this);
 438     popup.addTitle(i18nc("@title:menu", "Columns"));
 439
 440     QHeaderView* headerView = header();
 441     for (int i = DolphinModel::Size; i <= DolphinModel::Type; ++i) {
 442         const int logicalIndex = headerView->logicalIndex(i);
 443         const QString text = model()->headerData(i, Qt::Horizontal).toString();
 444         QAction* action = popup.addAction(text);
 445         action->setCheckable(true);
 446         action->setChecked(!headerView->isSectionHidden(logicalIndex));
 447         action->setData(i);
 448     }
 449
 450     QAction* activatedAction = popup.exec(header()->mapToGlobal(pos));
 451     if (activatedAction != 0) {
 452         const bool show = activatedAction->isChecked();
 453         const int columnIndex = activatedAction->data().toInt();
 454
 455         KFileItemDelegate::InformationList list = m_controller->dolphinView()->additionalInfo();
 456         KFileItemDelegate::Information info = KFileItemDelegate::NoInformation;
 457         switch (columnIndex) {
 458         case DolphinModel::Size:         info = KFileItemDelegate::Size; break;
 459         case DolphinModel::ModifiedTime: info = KFileItemDelegate::ModificationTime; break;
 460         case DolphinModel::Permissions:  info = KFileItemDelegate::Permissions; break;
 461         case DolphinModel::Owner:        info = KFileItemDelegate::Owner; break;
 462         case DolphinModel::Group:        info = KFileItemDelegate::OwnerAndGroup; break;
 463         case DolphinModel::Type:         info = KFileItemDelegate::FriendlyMimeType; break;
 464         default: break;
 465         }
 466
 467         if (show) {
 468             Q_ASSERT(!list.contains(info));
 469             list.append(info);
 470         } else {
 471             Q_ASSERT(list.contains(info));
 472             const int index = list.indexOf(info);
 473             list.removeAt(index);
 474         }
 475
 476         m_controller->indicateAdditionalInfoChange(list);
 477         setColumnHidden(columnIndex, !show);
 478     }
 479 }
 480
 481 void DolphinDetailsView::updateColumnVisibility()
 482 {
 483     KFileItemDelegate::InformationList list = m_controller->dolphinView()->additionalInfo();
 484     if (list.isEmpty() || list.contains(KFileItemDelegate::NoInformation)) {
 485         // Using the details view without any additional information (-> additional column)
 486         // makes no sense and leads to a usability problem as no viewport area is available
 487         // anymore. Hence as fallback provide at least a size and date column.
 488         list.clear();
 489         list.append(KFileItemDelegate::Size);
 490         list.append(KFileItemDelegate::ModificationTime);
 491         m_controller->indicateAdditionalInfoChange(list);
 492     }
 493
 494     setColumnHidden(DolphinModel::Size,         !list.contains(KFileItemDelegate::Size));
 495     setColumnHidden(DolphinModel::ModifiedTime, !list.contains(KFileItemDelegate::ModificationTime));
 496     setColumnHidden(DolphinModel::Permissions,  !list.contains(KFileItemDelegate::Permissions));
 497     setColumnHidden(DolphinModel::Owner,        !list.contains(KFileItemDelegate::Owner));
 498     setColumnHidden(DolphinModel::Group,        !list.contains(KFileItemDelegate::OwnerAndGroup));
 499     setColumnHidden(DolphinModel::Type,         !list.contains(KFileItemDelegate::FriendlyMimeType));
 500 }
 501
 502 bool DolphinDetailsView::isZoomInPossible() const
 503 {
 504     DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 505     return settings->iconSize() < KIconLoader::SizeLarge;
 506 }
 507
 508 bool DolphinDetailsView::isZoomOutPossible() const
 509 {
 510     DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 511     return settings->iconSize() > KIconLoader::SizeSmall;
 512 }
 513
 514 void DolphinDetailsView::updateDecorationSize()
 515 {
 516     DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 517     const int iconSize = settings->iconSize();
 518     m_viewOptions.decorationSize = QSize(iconSize, iconSize);
 519
 520     m_controller->setZoomInPossible(isZoomInPossible());
 521     m_controller->setZoomOutPossible(isZoomOutPossible());
 522
 523     doItemsLayout();
 524 }
 525
 526 QPoint DolphinDetailsView::contentsPos() const
 527 {
 528     // implementation note: the horizonal position is ignored currently, as no
 529     // horizontal scrolling is done anyway during a selection
 530     const QScrollBar* scrollbar = verticalScrollBar();
 531     Q_ASSERT(scrollbar != 0);
 532
 533     const int maxHeight = maximumViewportSize().height();
 534     const int height = scrollbar->maximum() - scrollbar->minimum() + 1;
 535     const int visibleHeight = model()->rowCount() + 1 - height;
 536     if (visibleHeight <= 0) {
 537         return QPoint(0, 0);
 538     }
 539
 540     const int y = scrollbar->sliderPosition() * maxHeight / visibleHeight;
 541     return QPoint(0, y);
 542 }
 543
 544 KFileItem DolphinDetailsView::itemForIndex(const QModelIndex& index) const
 545 {
 546     QAbstractProxyModel* proxyModel = static_cast<QAbstractProxyModel*>(model());
 547     KDirModel* dirModel = static_cast<KDirModel*>(proxyModel->sourceModel());
 548     const QModelIndex dirIndex = proxyModel->mapToSource(index);
 549     return dirModel->itemForIndex(dirIndex);
 550 }
 551
 552 #include "dolphindetailsview.moc"