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