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