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 <QApplication>
  32 #include <QHeaderView>
  33 #include <QRubberBand>
  34 #include <QPainter>
  35 #include <QScrollBar>
  36
  37 DolphinDetailsView::DolphinDetailsView(QWidget* parent, DolphinController* controller) :
  38     QTreeView(parent),
  39     m_controller(controller),
  40     m_dragging(false),
  41     m_showElasticBand(false),
  42     m_elasticBandOrigin(),
  43     m_elasticBandDestination()
  44 {
  45     Q_ASSERT(controller != 0);
  46
  47     setAcceptDrops(true);
  48     setRootIsDecorated(false);
  49     setSortingEnabled(true);
  50     setUniformRowHeights(true);
  51     setSelectionBehavior(SelectItems);
  52     setDragDropMode(QAbstractItemView::DragDrop);
  53     setDropIndicatorShown(false);
  54     setAlternatingRowColors(true);
  55     setHorizontalScrollMode(QAbstractItemView::ScrollPerPixel);
  56     setVerticalScrollMode(QAbstractItemView::ScrollPerPixel);
  57
  58     setMouseTracking(true);
  59     viewport()->setAttribute(Qt::WA_Hover);
  60
  61     const ViewProperties props(controller->url());
  62     setSortIndicatorSection(props.sorting());
  63     setSortIndicatorOrder(props.sortOrder());
  64
  65     connect(header(), SIGNAL(sectionClicked(int)),
  66             this, SLOT(synchronizeSortingState(int)));
  67
  68     connect(parent, SIGNAL(sortingChanged(DolphinView::Sorting)),
  69             this, SLOT(setSortIndicatorSection(DolphinView::Sorting)));
  70     connect(parent, SIGNAL(sortOrderChanged(Qt::SortOrder)),
  71             this, SLOT(setSortIndicatorOrder(Qt::SortOrder)));
  72
  73     // TODO: Connecting to the signal 'activated()' is not possible, as kstyle
  74     // does not forward the single vs. doubleclick to it yet (KDE 4.1?). Hence it is
  75     // necessary connecting the signal 'singleClick()' or 'doubleClick' and to handle the
  76     // RETURN-key in keyPressEvent().
  77     if (KGlobalSettings::singleClick()) {
  78         connect(this, SIGNAL(clicked(const QModelIndex&)),
  79                 this, SLOT(slotItemActivated(const QModelIndex&)));
  80     } else {
  81         connect(this, SIGNAL(doubleClicked(const QModelIndex&)),
  82                 this, SLOT(slotItemActivated(const QModelIndex&)));
  83     }
  84     connect(this, SIGNAL(entered(const QModelIndex&)),
  85             this, SLOT(slotEntered(const QModelIndex&)));
  86     connect(this, SIGNAL(viewportEntered()),
  87             controller, SLOT(emitViewportEntered()));
  88     connect(controller, SIGNAL(zoomIn()),
  89             this, SLOT(zoomIn()));
  90     connect(controller, SIGNAL(zoomOut()),
  91             this, SLOT(zoomOut()));
  92
  93     // apply the details mode settings to the widget
  94     const DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
  95     Q_ASSERT(settings != 0);
  96
  97     m_viewOptions = QTreeView::viewOptions();
  98
  99     QFont font(settings->fontFamily(), settings->fontSize());
 100     font.setItalic(settings->italicFont());
 101     font.setBold(settings->boldFont());
 102     m_viewOptions.font = font;
 103
 104     updateDecorationSize();
 105 }
 106
 107 DolphinDetailsView::~DolphinDetailsView()
 108 {
 109 }
 110
 111 bool DolphinDetailsView::event(QEvent* event)
 112 {
 113     if (event->type() == QEvent::Polish) {
 114         // Assure that by respecting the available width that:
 115         // - the 'Name' column is stretched as large as possible
 116         // - the remaining columns are as small as possible
 117         QHeaderView* headerView = header();
 118         headerView->setStretchLastSection(false);
 119         headerView->setResizeMode(QHeaderView::ResizeToContents);
 120         headerView->setMinimumSectionSize(-1);
 121         headerView->setDefaultSectionSize(viewport()->width());
 122
 123         // hide columns if this is indicated by the settings
 124         const DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 125         Q_ASSERT(settings != 0);
 126         if (!settings->showDate()) {
 127             hideColumn(DolphinModel::ModifiedTime);
 128         }
 129
 130         if (!settings->showPermissions()) {
 131             hideColumn(DolphinModel::Permissions);
 132         }
 133
 134         if (!settings->showOwner()) {
 135             hideColumn(DolphinModel::Owner);
 136         }
 137
 138         if (!settings->showGroup()) {
 139             hideColumn(DolphinModel::Group);
 140         }
 141
 142         if (!settings->showType()) {
 143             hideColumn(DolphinModel::Type);
 144         }
 145
 146         hideColumn(DolphinModel::Rating);
 147         hideColumn(DolphinModel::Tags);
 148     }
 149
 150     return QTreeView::event(event);
 151 }
 152
 153 QStyleOptionViewItem DolphinDetailsView::viewOptions() const
 154 {
 155     return m_viewOptions;
 156 }
 157
 158 void DolphinDetailsView::contextMenuEvent(QContextMenuEvent* event)
 159 {
 160     QTreeView::contextMenuEvent(event);
 161     m_controller->triggerContextMenuRequest(event->pos());
 162 }
 163
 164 void DolphinDetailsView::mousePressEvent(QMouseEvent* event)
 165 {
 166     m_controller->triggerActivation();
 167
 168     QTreeView::mousePressEvent(event);
 169
 170     const QModelIndex index = indexAt(event->pos());
 171     if (!index.isValid() || (index.column() != DolphinModel::Name)) {
 172         const Qt::KeyboardModifiers modifier = QApplication::keyboardModifiers();
 173         if (!(modifier & Qt::ShiftModifier) && !(modifier & Qt::ControlModifier)) {
 174             clearSelection();
 175         }
 176     }
 177
 178     if (event->button() == Qt::LeftButton) {
 179         m_showElasticBand = true;
 180
 181         const QPoint pos(contentsPos());
 182         m_elasticBandOrigin = event->pos();
 183         m_elasticBandOrigin.setX(m_elasticBandOrigin.x() + pos.x());
 184         m_elasticBandOrigin.setY(m_elasticBandOrigin.y() + pos.y());
 185         m_elasticBandDestination = event->pos();
 186     }
 187 }
 188
 189 void DolphinDetailsView::mouseMoveEvent(QMouseEvent* event)
 190 {
 191     QTreeView::mouseMoveEvent(event);
 192     if (m_showElasticBand) {
 193         updateElasticBand();
 194     }
 195 }
 196
 197 void DolphinDetailsView::mouseReleaseEvent(QMouseEvent* event)
 198 {
 199     QTreeView::mouseReleaseEvent(event);
 200     if (m_showElasticBand) {
 201         updateElasticBand();
 202         m_showElasticBand = false;
 203     }
 204 }
 205
 206 void DolphinDetailsView::dragEnterEvent(QDragEnterEvent* event)
 207 {
 208     if (event->mimeData()->hasUrls()) {
 209         event->acceptProposedAction();
 210     }
 211
 212     if (m_showElasticBand) {
 213         updateElasticBand();
 214         m_showElasticBand = false;
 215     }
 216     m_dragging = true;
 217 }
 218
 219 void DolphinDetailsView::dragLeaveEvent(QDragLeaveEvent* event)
 220 {
 221     QTreeView::dragLeaveEvent(event);
 222
 223     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 224     m_dragging = false;
 225     setDirtyRegion(m_dropRect);
 226 }
 227
 228 void DolphinDetailsView::dragMoveEvent(QDragMoveEvent* event)
 229 {
 230     QTreeView::dragMoveEvent(event);
 231
 232     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 233     setDirtyRegion(m_dropRect);
 234     const QModelIndex index = indexAt(event->pos());
 235     if (!index.isValid() || (index.column() != DolphinModel::Name)) {
 236         m_dragging = false;
 237     } else {
 238         m_dragging = true;
 239         m_dropRect = visualRect(index);
 240         setDirtyRegion(m_dropRect);
 241     }
 242 }
 243
 244 void DolphinDetailsView::dropEvent(QDropEvent* event)
 245 {
 246     const KUrl::List urls = KUrl::List::fromMimeData(event->mimeData());
 247     if (!urls.isEmpty()) {
 248         event->acceptProposedAction();
 249         m_controller->indicateDroppedUrls(urls,
 250                                           m_controller->url(),
 251                                           indexAt(event->pos()),
 252                                           event->source());
 253     }
 254     QTreeView::dropEvent(event);
 255     m_dragging = false;
 256 }
 257
 258 void DolphinDetailsView::paintEvent(QPaintEvent* event)
 259 {
 260     QTreeView::paintEvent(event);
 261     if (m_showElasticBand) {
 262         // The following code has been taken from QListView
 263         // and adapted to DolphinDetailsView.
 264         // (C) 1992-2007 Trolltech ASA
 265         QStyleOptionRubberBand opt;
 266         opt.initFrom(this);
 267         opt.shape = QRubberBand::Rectangle;
 268         opt.opaque = false;
 269         opt.rect = elasticBandRect();
 270
 271         QPainter painter(viewport());
 272         painter.save();
 273         style()->drawControl(QStyle::CE_RubberBand, &opt, &painter);
 274         painter.restore();
 275     }
 276
 277     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 278     if (m_dragging) {
 279         const QBrush& brush = m_viewOptions.palette.brush(QPalette::Normal, QPalette::Highlight);
 280         DolphinController::drawHoverIndication(viewport(), m_dropRect, brush);
 281     }
 282 }
 283
 284 void DolphinDetailsView::keyPressEvent(QKeyEvent* event)
 285 {
 286     QTreeView::keyPressEvent(event);
 287
 288     const QItemSelectionModel* selModel = selectionModel();
 289     const QModelIndex currentIndex = selModel->currentIndex();
 290     const bool triggerItem = currentIndex.isValid()
 291                              && (event->key() == Qt::Key_Return)
 292                              && (selModel->selectedIndexes().count() <= 1);
 293     if (triggerItem) {
 294         m_controller->triggerItem(currentIndex);
 295     }
 296 }
 297
 298 void DolphinDetailsView::setSortIndicatorSection(DolphinView::Sorting sorting)
 299 {
 300     QHeaderView* headerView = header();
 301     headerView->setSortIndicator(sorting, headerView->sortIndicatorOrder());
 302 }
 303
 304 void DolphinDetailsView::setSortIndicatorOrder(Qt::SortOrder sortOrder)
 305 {
 306     QHeaderView* headerView = header();
 307     headerView->setSortIndicator(headerView->sortIndicatorSection(), sortOrder);
 308 }
 309
 310 void DolphinDetailsView::synchronizeSortingState(int column)
 311 {
 312     // The sorting has already been changed in QTreeView if this slot is
 313     // invoked, but Dolphin is not informed about this.
 314     DolphinView::Sorting sorting = DolphinSortFilterProxyModel::sortingForColumn(column);
 315     const Qt::SortOrder sortOrder = header()->sortIndicatorOrder();
 316     m_controller->indicateSortingChange(sorting);
 317     m_controller->indicateSortOrderChange(sortOrder);
 318 }
 319
 320 void DolphinDetailsView::slotEntered(const QModelIndex& index)
 321 {
 322     const QPoint pos = viewport()->mapFromGlobal(QCursor::pos());
 323     const int nameColumnWidth = header()->sectionSize(DolphinModel::Name);
 324     if (pos.x() < nameColumnWidth) {
 325         m_controller->emitItemEntered(index);
 326     }
 327     else {
 328         m_controller->emitViewportEntered();
 329     }
 330 }
 331
 332 void DolphinDetailsView::updateElasticBand()
 333 {
 334     Q_ASSERT(m_showElasticBand);
 335     QRect dirtyRegion(elasticBandRect());
 336     m_elasticBandDestination = viewport()->mapFromGlobal(QCursor::pos());
 337     dirtyRegion = dirtyRegion.united(elasticBandRect());
 338     setDirtyRegion(dirtyRegion);
 339 }
 340
 341 void DolphinDetailsView::zoomIn()
 342 {
 343     if (isZoomInPossible()) {
 344         DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 345         // TODO: get rid of K3Icon sizes
 346         switch (settings->iconSize()) {
 347         case K3Icon::SizeSmall:  settings->setIconSize(K3Icon::SizeMedium); break;
 348         case K3Icon::SizeMedium: settings->setIconSize(K3Icon::SizeLarge); break;
 349         default: Q_ASSERT(false); break;
 350         }
 351         updateDecorationSize();
 352     }
 353 }
 354
 355 void DolphinDetailsView::zoomOut()
 356 {
 357     if (isZoomOutPossible()) {
 358         DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 359         // TODO: get rid of K3Icon sizes
 360         switch (settings->iconSize()) {
 361         case K3Icon::SizeLarge:  settings->setIconSize(K3Icon::SizeMedium); break;
 362         case K3Icon::SizeMedium: settings->setIconSize(K3Icon::SizeSmall); break;
 363         default: Q_ASSERT(false); break;
 364         }
 365         updateDecorationSize();
 366     }
 367 }
 368
 369 bool DolphinDetailsView::isZoomInPossible() const
 370 {
 371     DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 372     return settings->iconSize() < K3Icon::SizeLarge;
 373 }
 374
 375 bool DolphinDetailsView::isZoomOutPossible() const
 376 {
 377     DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 378     return settings->iconSize() > K3Icon::SizeSmall;
 379 }
 380
 381 void DolphinDetailsView::updateDecorationSize()
 382 {
 383     DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 384     const int iconSize = settings->iconSize();
 385     m_viewOptions.decorationSize = QSize(iconSize, iconSize);
 386
 387     m_controller->setZoomInPossible(isZoomInPossible());
 388     m_controller->setZoomOutPossible(isZoomOutPossible());
 389
 390     doItemsLayout();
 391 }
 392
 393 QPoint DolphinDetailsView::contentsPos() const
 394 {
 395     // implementation note: the horizonal position is ignored currently, as no
 396     // horizontal scrolling is done anyway during a selection
 397     const QScrollBar* scrollbar = verticalScrollBar();
 398     Q_ASSERT(scrollbar != 0);
 399
 400     const int maxHeight = maximumViewportSize().height();
 401     const int height = scrollbar->maximum() - scrollbar->minimum() + 1;
 402     const int visibleHeight = model()->rowCount() + 1 - height;
 403     if (visibleHeight <= 0) {
 404         return QPoint(0, 0);
 405     }
 406
 407     const int y = scrollbar->sliderPosition() * maxHeight / visibleHeight;
 408     return QPoint(0, y);
 409 }
 410
 411 QRect DolphinDetailsView::elasticBandRect() const
 412 {
 413     const QPoint pos(contentsPos());
 414     const QPoint topLeft(m_elasticBandOrigin.x() - pos.x(), m_elasticBandOrigin.y() - pos.y());
 415     return QRect(topLeft, m_elasticBandDestination).normalized();
 416 }
 417
 418 static bool isValidNameIndex(const QModelIndex& index)
 419 {
 420     return index.isValid() && (index.column() == KDirModel::Name);
 421 }
 422
 423 void DolphinDetailsView::slotItemActivated(const QModelIndex& index)
 424 {
 425     if (!isValidNameIndex(index)) {
 426         clearSelection();
 427         m_controller->emitItemEntered(index);
 428     } else {
 429         m_controller->triggerItem(index);
 430     }
 431 }
 432
 433 #include "dolphindetailsview.moc"