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
 101     // apply the details mode settings to the widget
 102     const DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 103     Q_ASSERT(settings != 0);
 104
 105     m_viewOptions = QTreeView::viewOptions();
 106
 107     QFont font(settings->fontFamily(), settings->fontSize());
 108     font.setItalic(settings->italicFont());
 109     font.setBold(settings->boldFont());
 110     m_viewOptions.font = font;
 111     m_viewOptions.showDecorationSelected = true;
 112
 113 // TODO: Remove this check when 4.3.2 is released and KDE requires it... this
 114 //       check avoids a division by zero happening on versions before 4.3.1.
 115 //       Right now KDE in theory can be shipped with Qt 4.3.0 and above.
 116 //       ereslibre
 117 #if (QT_VERSION >= QT_VERSION_CHECK(4, 3, 2) || defined(QT_KDE_QT_COPY))
 118     setVerticalScrollMode(QTreeView::ScrollPerPixel);
 119     setHorizontalScrollMode(QTreeView::ScrollPerPixel);
 120 #endif
 121
 122     updateDecorationSize();
 123 }
 124
 125 DolphinDetailsView::~DolphinDetailsView()
 126 {
 127 }
 128
 129 bool DolphinDetailsView::event(QEvent* event)
 130 {
 131     if (event->type() == QEvent::Polish) {
 132         // Assure that by respecting the available width that:
 133         // - the 'Name' column is stretched as large as possible
 134         // - the remaining columns are as small as possible
 135         QHeaderView* headerView = header();
 136         headerView->setStretchLastSection(false);
 137         headerView->setResizeMode(QHeaderView::ResizeToContents);
 138         headerView->setResizeMode(0, QHeaderView::Stretch);
 139         headerView->setMovable(false);
 140
 141         // hide columns if this is indicated by the settings
 142         const DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 143         Q_ASSERT(settings != 0);
 144         if (!settings->showDate()) {
 145             hideColumn(DolphinModel::ModifiedTime);
 146         }
 147
 148         if (!settings->showPermissions()) {
 149             hideColumn(DolphinModel::Permissions);
 150         }
 151
 152         if (!settings->showOwner()) {
 153             hideColumn(DolphinModel::Owner);
 154         }
 155
 156         if (!settings->showGroup()) {
 157             hideColumn(DolphinModel::Group);
 158         }
 159
 160         if (!settings->showType()) {
 161             hideColumn(DolphinModel::Type);
 162         }
 163
 164         hideColumn(DolphinModel::Rating);
 165         hideColumn(DolphinModel::Tags);
 166     }
 167 // TODO: Remove this check when 4.3.2 is released and KDE requires it... this
 168 //       check avoids a division by zero happening on versions before 4.3.1.
 169 //       Right now KDE in theory can be shipped with Qt 4.3.0 and above.
 170 //       ereslibre
 171 #if (QT_VERSION >= QT_VERSION_CHECK(4, 3, 2) || defined(QT_KDE_QT_COPY))
 172     else if (event->type() == QEvent::UpdateRequest) {
 173         // a wheel movement will scroll 4 items
 174         if (model()->rowCount() > 0) {
 175             verticalScrollBar()->setSingleStep((sizeHintForRow(0) / 3) * 4);
 176         }
 177     }
 178 #endif
 179
 180     return QTreeView::event(event);
 181 }
 182
 183 QStyleOptionViewItem DolphinDetailsView::viewOptions() const
 184 {
 185     return m_viewOptions;
 186 }
 187
 188 void DolphinDetailsView::contextMenuEvent(QContextMenuEvent* event)
 189 {
 190     QTreeView::contextMenuEvent(event);
 191     m_controller->triggerContextMenuRequest(event->pos());
 192 }
 193
 194 void DolphinDetailsView::mousePressEvent(QMouseEvent* event)
 195 {
 196     m_controller->requestActivation();
 197
 198     QTreeView::mousePressEvent(event);
 199
 200     const QModelIndex index = indexAt(event->pos());
 201     if (!index.isValid() || (index.column() != DolphinModel::Name)) {
 202         const Qt::KeyboardModifiers modifier = QApplication::keyboardModifiers();
 203         if (!(modifier & Qt::ShiftModifier) && !(modifier & Qt::ControlModifier)) {
 204             clearSelection();
 205         }
 206     }
 207
 208     if (event->button() == Qt::LeftButton) {
 209         m_showElasticBand = true;
 210
 211         const QPoint pos(contentsPos());
 212         m_elasticBandOrigin = event->pos();
 213         m_elasticBandOrigin.setX(m_elasticBandOrigin.x() + pos.x());
 214         m_elasticBandOrigin.setY(m_elasticBandOrigin.y() + pos.y());
 215         m_elasticBandDestination = event->pos();
 216     }
 217 }
 218
 219 void DolphinDetailsView::mouseMoveEvent(QMouseEvent* event)
 220 {
 221     QTreeView::mouseMoveEvent(event);
 222     if (m_showElasticBand) {
 223         updateElasticBand();
 224     }
 225 }
 226
 227 void DolphinDetailsView::mouseReleaseEvent(QMouseEvent* event)
 228 {
 229     QTreeView::mouseReleaseEvent(event);
 230     if (m_showElasticBand) {
 231         updateElasticBand();
 232         m_showElasticBand = false;
 233     }
 234 }
 235
 236 void DolphinDetailsView::dragEnterEvent(QDragEnterEvent* event)
 237 {
 238     if (event->mimeData()->hasUrls()) {
 239         event->acceptProposedAction();
 240     }
 241
 242     if (m_showElasticBand) {
 243         updateElasticBand();
 244         m_showElasticBand = false;
 245     }
 246     m_dragging = true;
 247 }
 248
 249 void DolphinDetailsView::dragLeaveEvent(QDragLeaveEvent* event)
 250 {
 251     QTreeView::dragLeaveEvent(event);
 252
 253     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 254     m_dragging = false;
 255     setDirtyRegion(m_dropRect);
 256 }
 257
 258 void DolphinDetailsView::dragMoveEvent(QDragMoveEvent* event)
 259 {
 260     QTreeView::dragMoveEvent(event);
 261
 262     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 263     setDirtyRegion(m_dropRect);
 264     const QModelIndex index = indexAt(event->pos());
 265     if (!index.isValid() || (index.column() != DolphinModel::Name)) {
 266         m_dragging = false;
 267     } else {
 268         m_dragging = true;
 269         m_dropRect = visualRect(index);
 270         setDirtyRegion(m_dropRect);
 271     }
 272 }
 273
 274 void DolphinDetailsView::dropEvent(QDropEvent* event)
 275 {
 276     const KUrl::List urls = KUrl::List::fromMimeData(event->mimeData());
 277     if (!urls.isEmpty()) {
 278         event->acceptProposedAction();
 279         m_controller->indicateDroppedUrls(urls,
 280                                           m_controller->url(),
 281                                           indexAt(event->pos()),
 282                                           event->source());
 283     }
 284     QTreeView::dropEvent(event);
 285     m_dragging = false;
 286 }
 287
 288 void DolphinDetailsView::paintEvent(QPaintEvent* event)
 289 {
 290     QTreeView::paintEvent(event);
 291     if (m_showElasticBand) {
 292         // The following code has been taken from QListView
 293         // and adapted to DolphinDetailsView.
 294         // (C) 1992-2007 Trolltech ASA
 295         QStyleOptionRubberBand opt;
 296         opt.initFrom(this);
 297         opt.shape = QRubberBand::Rectangle;
 298         opt.opaque = false;
 299         opt.rect = elasticBandRect();
 300
 301         QPainter painter(viewport());
 302         painter.save();
 303         style()->drawControl(QStyle::CE_RubberBand, &opt, &painter);
 304         painter.restore();
 305     }
 306
 307     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 308     if (m_dragging) {
 309         const QBrush& brush = m_viewOptions.palette.brush(QPalette::Normal, QPalette::Highlight);
 310         DolphinController::drawHoverIndication(viewport(), m_dropRect, brush);
 311     }
 312 }
 313
 314 void DolphinDetailsView::keyPressEvent(QKeyEvent* event)
 315 {
 316     QTreeView::keyPressEvent(event);
 317
 318     const QItemSelectionModel* selModel = selectionModel();
 319     const QModelIndex currentIndex = selModel->currentIndex();
 320     const bool trigger = currentIndex.isValid()
 321                          && (event->key() == Qt::Key_Return)
 322                          && (selModel->selectedIndexes().count() <= 1);
 323     if (trigger) {
 324         triggerItem(currentIndex);
 325     }
 326 }
 327
 328 void DolphinDetailsView::resizeEvent(QResizeEvent* event)
 329 {
 330     QTreeView::resizeEvent(event);
 331
 332     // assure that the width of the name-column does not get too small
 333     const int minWidth = 120;
 334     QHeaderView* headerView = header();
 335     bool useFixedWidth = (headerView->sectionSize(KDirModel::Name) <= minWidth)
 336                          && (headerView->resizeMode(0) != QHeaderView::Fixed);
 337     if (useFixedWidth) {
 338         // the current width of the name-column is too small, hence
 339         // use a fixed size
 340         headerView->setResizeMode(QHeaderView::Fixed);
 341         headerView->setResizeMode(0, QHeaderView::Fixed);
 342         headerView->resizeSection(KDirModel::Name, minWidth);
 343     } else if (headerView->resizeMode(0) != QHeaderView::Stretch) {
 344         // check whether there is enough available viewport width
 345         // to automatically resize the columns
 346         const int availableWidth = viewport()->width();
 347
 348         int headerWidth = 0;
 349         const int count = headerView->count();
 350         for (int i = 0; i < count; ++i) {
 351             headerWidth += headerView->sectionSize(i);
 352         }
 353
 354         if (headerWidth < availableWidth) {
 355             headerView->setResizeMode(QHeaderView::ResizeToContents);
 356             headerView->setResizeMode(0, QHeaderView::Stretch);
 357         }
 358     }
 359 }
 360
 361 void DolphinDetailsView::setSortIndicatorSection(DolphinView::Sorting sorting)
 362 {
 363     QHeaderView* headerView = header();
 364     headerView->setSortIndicator(sorting, headerView->sortIndicatorOrder());
 365 }
 366
 367 void DolphinDetailsView::setSortIndicatorOrder(Qt::SortOrder sortOrder)
 368 {
 369     QHeaderView* headerView = header();
 370     headerView->setSortIndicator(headerView->sortIndicatorSection(), sortOrder);
 371 }
 372
 373 void DolphinDetailsView::synchronizeSortingState(int column)
 374 {
 375     // The sorting has already been changed in QTreeView if this slot is
 376     // invoked, but Dolphin is not informed about this.
 377     DolphinView::Sorting sorting = DolphinSortFilterProxyModel::sortingForColumn(column);
 378     const Qt::SortOrder sortOrder = header()->sortIndicatorOrder();
 379     m_controller->indicateSortingChange(sorting);
 380     m_controller->indicateSortOrderChange(sortOrder);
 381 }
 382
 383 void DolphinDetailsView::slotEntered(const QModelIndex& index)
 384 {
 385     const QPoint pos = viewport()->mapFromGlobal(QCursor::pos());
 386     const int nameColumnWidth = header()->sectionSize(DolphinModel::Name);
 387     if (pos.x() < nameColumnWidth) {
 388         m_controller->emitItemEntered(itemForIndex(index));
 389     }
 390     else {
 391         m_controller->emitViewportEntered();
 392     }
 393 }
 394
 395 void DolphinDetailsView::updateElasticBand()
 396 {
 397     Q_ASSERT(m_showElasticBand);
 398     QRect dirtyRegion(elasticBandRect());
 399     m_elasticBandDestination = viewport()->mapFromGlobal(QCursor::pos());
 400     dirtyRegion = dirtyRegion.united(elasticBandRect());
 401     setDirtyRegion(dirtyRegion);
 402 }
 403
 404 QRect DolphinDetailsView::elasticBandRect() const
 405 {
 406     const QPoint pos(contentsPos());
 407     const QPoint topLeft(m_elasticBandOrigin.x() - pos.x(), m_elasticBandOrigin.y() - pos.y());
 408     return QRect(topLeft, m_elasticBandDestination).normalized();
 409 }
 410
 411 void DolphinDetailsView::zoomIn()
 412 {
 413     if (isZoomInPossible()) {
 414         DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 415         switch (settings->iconSize()) {
 416         case KIconLoader::SizeSmall:  settings->setIconSize(KIconLoader::SizeMedium); break;
 417         case KIconLoader::SizeMedium: settings->setIconSize(KIconLoader::SizeLarge); break;
 418         default: Q_ASSERT(false); break;
 419         }
 420         updateDecorationSize();
 421     }
 422 }
 423
 424 void DolphinDetailsView::zoomOut()
 425 {
 426     if (isZoomOutPossible()) {
 427         DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 428         switch (settings->iconSize()) {
 429         case KIconLoader::SizeLarge:  settings->setIconSize(KIconLoader::SizeMedium); break;
 430         case KIconLoader::SizeMedium: settings->setIconSize(KIconLoader::SizeSmall); break;
 431         default: Q_ASSERT(false); break;
 432         }
 433         updateDecorationSize();
 434     }
 435 }
 436
 437 void DolphinDetailsView::triggerItem(const QModelIndex& index)
 438 {
 439     const KFileItem item = itemForIndex(index);
 440     if (index.isValid() && (index.column() == KDirModel::Name)) {
 441         m_controller->triggerItem(item);
 442     } else {
 443         clearSelection();
 444         m_controller->emitItemEntered(item);
 445     }
 446 }
 447
 448 void DolphinDetailsView::configureColumns(const QPoint& pos)
 449 {
 450     KMenu popup(this);
 451     popup.addTitle(i18nc("@title:menu", "Columns"));
 452
 453     QHeaderView* headerView = header();
 454     for (int i = DolphinModel::ModifiedTime; i <= DolphinModel::Type; ++i) {
 455         const int logicalIndex = headerView->logicalIndex(i);
 456         const QString text = model()->headerData(i, Qt::Horizontal).toString();
 457         QAction* action = popup.addAction(text);
 458         action->setCheckable(true);
 459         action->setChecked(!headerView->isSectionHidden(logicalIndex));
 460         action->setData(i);
 461     }
 462
 463     QAction* activatedAction = popup.exec(header()->mapToGlobal(pos));
 464     if (activatedAction != 0) {
 465         const bool show = activatedAction->isChecked();
 466         DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 467         Q_ASSERT(settings != 0);
 468
 469         // remember the changed column visibility in the settings
 470         const int columnIndex = activatedAction->data().toInt();
 471         switch (columnIndex) {
 472         case DolphinModel::ModifiedTime: settings->setShowDate(show); break;
 473         case DolphinModel::Permissions:  settings->setShowPermissions(show); break;
 474         case DolphinModel::Owner:        settings->setShowOwner(show); break;
 475         case DolphinModel::Group:        settings->setShowGroup(show); break;
 476         case DolphinModel::Type:         settings->setShowType(show); break;
 477         default: break;
 478         }
 479
 480         // apply the changed column visibility
 481         if (show) {
 482             showColumn(columnIndex);
 483         } else {
 484             hideColumn(columnIndex);
 485         }
 486     }
 487 }
 488
 489 bool DolphinDetailsView::isZoomInPossible() const
 490 {
 491     DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 492     return settings->iconSize() < KIconLoader::SizeLarge;
 493 }
 494
 495 bool DolphinDetailsView::isZoomOutPossible() const
 496 {
 497     DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 498     return settings->iconSize() > KIconLoader::SizeSmall;
 499 }
 500
 501 void DolphinDetailsView::updateDecorationSize()
 502 {
 503     DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 504     const int iconSize = settings->iconSize();
 505     m_viewOptions.decorationSize = QSize(iconSize, iconSize);
 506
 507     m_controller->setZoomInPossible(isZoomInPossible());
 508     m_controller->setZoomOutPossible(isZoomOutPossible());
 509
 510     doItemsLayout();
 511 }
 512
 513 QPoint DolphinDetailsView::contentsPos() const
 514 {
 515     // implementation note: the horizonal position is ignored currently, as no
 516     // horizontal scrolling is done anyway during a selection
 517     const QScrollBar* scrollbar = verticalScrollBar();
 518     Q_ASSERT(scrollbar != 0);
 519
 520     const int maxHeight = maximumViewportSize().height();
 521     const int height = scrollbar->maximum() - scrollbar->minimum() + 1;
 522     const int visibleHeight = model()->rowCount() + 1 - height;
 523     if (visibleHeight <= 0) {
 524         return QPoint(0, 0);
 525     }
 526
 527     const int y = scrollbar->sliderPosition() * maxHeight / visibleHeight;
 528     return QPoint(0, y);
 529 }
 530
 531 KFileItem DolphinDetailsView::itemForIndex(const QModelIndex& index) const
 532 {
 533     QAbstractProxyModel* proxyModel = static_cast<QAbstractProxyModel*>(model());
 534     KDirModel* dirModel = static_cast<KDirModel*>(proxyModel->sourceModel());
 535     const QModelIndex dirIndex = proxyModel->mapToSource(index);
 536     return dirModel->itemForIndex(dirIndex);
 537 }
 538
 539 #include "dolphindetailsview.moc"