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