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         hideColumn(DolphinModel::Rating);
 144         hideColumn(DolphinModel::Tags);
 145     }
 146
 147     return QTreeView::event(event);
 148 }
 149
 150 QStyleOptionViewItem DolphinDetailsView::viewOptions() const
 151 {
 152     return m_viewOptions;
 153 }
 154
 155 void DolphinDetailsView::contextMenuEvent(QContextMenuEvent* event)
 156 {
 157     QTreeView::contextMenuEvent(event);
 158     m_controller->triggerContextMenuRequest(event->pos());
 159 }
 160
 161 void DolphinDetailsView::mousePressEvent(QMouseEvent* event)
 162 {
 163     m_controller->triggerActivation();
 164
 165     QTreeView::mousePressEvent(event);
 166
 167     const QModelIndex index = indexAt(event->pos());
 168     if (!index.isValid() || (index.column() != DolphinModel::Name)) {
 169         const Qt::KeyboardModifiers modifier = QApplication::keyboardModifiers();
 170         if (!(modifier & Qt::ShiftModifier) && !(modifier & Qt::ControlModifier)) {
 171             clearSelection();
 172         }
 173     }
 174
 175     if (event->button() == Qt::LeftButton) {
 176         m_showElasticBand = true;
 177
 178         const QPoint pos(contentsPos());
 179         m_elasticBandOrigin = event->pos();
 180         m_elasticBandOrigin.setX(m_elasticBandOrigin.x() + pos.x());
 181         m_elasticBandOrigin.setY(m_elasticBandOrigin.y() + pos.y());
 182         m_elasticBandDestination = event->pos();
 183     }
 184 }
 185
 186 void DolphinDetailsView::mouseMoveEvent(QMouseEvent* event)
 187 {
 188     QTreeView::mouseMoveEvent(event);
 189     if (m_showElasticBand) {
 190         updateElasticBand();
 191     }
 192 }
 193
 194 void DolphinDetailsView::mouseReleaseEvent(QMouseEvent* event)
 195 {
 196     QTreeView::mouseReleaseEvent(event);
 197     if (m_showElasticBand) {
 198         updateElasticBand();
 199         m_showElasticBand = false;
 200     }
 201 }
 202
 203 void DolphinDetailsView::dragEnterEvent(QDragEnterEvent* event)
 204 {
 205     if (event->mimeData()->hasUrls()) {
 206         event->acceptProposedAction();
 207     }
 208
 209     if (m_showElasticBand) {
 210         updateElasticBand();
 211         m_showElasticBand = false;
 212     }
 213     m_dragging = true;
 214 }
 215
 216 void DolphinDetailsView::dragLeaveEvent(QDragLeaveEvent* event)
 217 {
 218     QTreeView::dragLeaveEvent(event);
 219
 220     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 221     m_dragging = false;
 222     setDirtyRegion(m_dropRect);
 223 }
 224
 225 void DolphinDetailsView::dragMoveEvent(QDragMoveEvent* event)
 226 {
 227     QTreeView::dragMoveEvent(event);
 228
 229     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 230     setDirtyRegion(m_dropRect);
 231     const QModelIndex index = indexAt(event->pos());
 232     if (!index.isValid() || (index.column() != DolphinModel::Name)) {
 233         m_dragging = false;
 234     } else {
 235         m_dragging = true;
 236         m_dropRect = visualRect(index);
 237         setDirtyRegion(m_dropRect);
 238     }
 239 }
 240
 241 void DolphinDetailsView::dropEvent(QDropEvent* event)
 242 {
 243     const KUrl::List urls = KUrl::List::fromMimeData(event->mimeData());
 244     if (!urls.isEmpty()) {
 245         event->acceptProposedAction();
 246         m_controller->indicateDroppedUrls(urls,
 247                                           m_controller->url(),
 248                                           indexAt(event->pos()),
 249                                           event->source());
 250     }
 251     QTreeView::dropEvent(event);
 252     m_dragging = false;
 253 }
 254
 255 void DolphinDetailsView::paintEvent(QPaintEvent* event)
 256 {
 257     QTreeView::paintEvent(event);
 258     if (m_showElasticBand) {
 259         // The following code has been taken from QListView
 260         // and adapted to DolphinDetailsView.
 261         // (C) 1992-2007 Trolltech ASA
 262         QStyleOptionRubberBand opt;
 263         opt.initFrom(this);
 264         opt.shape = QRubberBand::Rectangle;
 265         opt.opaque = false;
 266         opt.rect = elasticBandRect();
 267
 268         QPainter painter(viewport());
 269         painter.save();
 270         style()->drawControl(QStyle::CE_RubberBand, &opt, &painter);
 271         painter.restore();
 272     }
 273
 274     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 275     if (m_dragging) {
 276         const QBrush& brush = m_viewOptions.palette.brush(QPalette::Normal, QPalette::Highlight);
 277         DolphinController::drawHoverIndication(viewport(), m_dropRect, brush);
 278     }
 279 }
 280
 281 void DolphinDetailsView::keyPressEvent(QKeyEvent* event)
 282 {
 283     QTreeView::keyPressEvent(event);
 284
 285     const QItemSelectionModel* selModel = selectionModel();
 286     const QModelIndex currentIndex = selModel->currentIndex();
 287     const bool triggerItem = currentIndex.isValid()
 288                              && (event->key() == Qt::Key_Return)
 289                              && (selModel->selectedIndexes().count() <= 1);
 290     if (triggerItem) {
 291         m_controller->triggerItem(currentIndex);
 292     }
 293 }
 294
 295 void DolphinDetailsView::resizeEvent(QResizeEvent* event)
 296 {
 297     QTreeView::resizeEvent(event);
 298
 299     // assure that the width of the name-column does not get too small
 300     const int minWidth = 120;
 301     QHeaderView* headerView = header();
 302     bool useFixedWidth = (headerView->sectionSize(KDirModel::Name) <= minWidth)
 303                          && (headerView->resizeMode(0) != QHeaderView::Fixed);
 304     if (useFixedWidth) {
 305         // the current width of the name-column is too small, hence
 306         // use a fixed size
 307         headerView->setResizeMode(QHeaderView::Fixed);
 308         headerView->setResizeMode(0, QHeaderView::Fixed);
 309         headerView->resizeSection(KDirModel::Name, minWidth);
 310     } else if (headerView->resizeMode(0) != QHeaderView::Stretch) {
 311         // check whether there is enough available viewport width
 312         // to automatically resize the columns
 313         const int availableWidth = viewport()->width();
 314
 315         int headerWidth = 0;
 316         const int count = headerView->count();
 317         for (int i = 0; i < count; ++i) {
 318             headerWidth += headerView->sectionSize(i);
 319         }
 320
 321         if (headerWidth < availableWidth) {
 322             headerView->setResizeMode(QHeaderView::ResizeToContents);
 323             headerView->setResizeMode(0, QHeaderView::Stretch);
 324         }
 325     }
 326 }
 327
 328 void DolphinDetailsView::setSortIndicatorSection(DolphinView::Sorting sorting)
 329 {
 330     QHeaderView* headerView = header();
 331     headerView->setSortIndicator(sorting, headerView->sortIndicatorOrder());
 332 }
 333
 334 void DolphinDetailsView::setSortIndicatorOrder(Qt::SortOrder sortOrder)
 335 {
 336     QHeaderView* headerView = header();
 337     headerView->setSortIndicator(headerView->sortIndicatorSection(), sortOrder);
 338 }
 339
 340 void DolphinDetailsView::synchronizeSortingState(int column)
 341 {
 342     // The sorting has already been changed in QTreeView if this slot is
 343     // invoked, but Dolphin is not informed about this.
 344     DolphinView::Sorting sorting = DolphinSortFilterProxyModel::sortingForColumn(column);
 345     const Qt::SortOrder sortOrder = header()->sortIndicatorOrder();
 346     m_controller->indicateSortingChange(sorting);
 347     m_controller->indicateSortOrderChange(sortOrder);
 348 }
 349
 350 void DolphinDetailsView::slotEntered(const QModelIndex& index)
 351 {
 352     const QPoint pos = viewport()->mapFromGlobal(QCursor::pos());
 353     const int nameColumnWidth = header()->sectionSize(DolphinModel::Name);
 354     if (pos.x() < nameColumnWidth) {
 355         m_controller->emitItemEntered(index);
 356     }
 357     else {
 358         m_controller->emitViewportEntered();
 359     }
 360 }
 361
 362 void DolphinDetailsView::updateElasticBand()
 363 {
 364     Q_ASSERT(m_showElasticBand);
 365     QRect dirtyRegion(elasticBandRect());
 366     m_elasticBandDestination = viewport()->mapFromGlobal(QCursor::pos());
 367     dirtyRegion = dirtyRegion.united(elasticBandRect());
 368     setDirtyRegion(dirtyRegion);
 369 }
 370
 371 void DolphinDetailsView::zoomIn()
 372 {
 373     if (isZoomInPossible()) {
 374         DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 375         // TODO: get rid of K3Icon sizes
 376         switch (settings->iconSize()) {
 377         case K3Icon::SizeSmall:  settings->setIconSize(K3Icon::SizeMedium); break;
 378         case K3Icon::SizeMedium: settings->setIconSize(K3Icon::SizeLarge); break;
 379         default: Q_ASSERT(false); break;
 380         }
 381         updateDecorationSize();
 382     }
 383 }
 384
 385 void DolphinDetailsView::zoomOut()
 386 {
 387     if (isZoomOutPossible()) {
 388         DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 389         // TODO: get rid of K3Icon sizes
 390         switch (settings->iconSize()) {
 391         case K3Icon::SizeLarge:  settings->setIconSize(K3Icon::SizeMedium); break;
 392         case K3Icon::SizeMedium: settings->setIconSize(K3Icon::SizeSmall); break;
 393         default: Q_ASSERT(false); break;
 394         }
 395         updateDecorationSize();
 396     }
 397 }
 398
 399 void DolphinDetailsView::slotItemActivated(const QModelIndex& index)
 400 {
 401     if (index.isValid() && (index.column() == KDirModel::Name)) {
 402         m_controller->triggerItem(index);
 403     } else {
 404         clearSelection();
 405         m_controller->emitItemEntered(index);
 406     }
 407 }
 408
 409 bool DolphinDetailsView::isZoomInPossible() const
 410 {
 411     DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 412     return settings->iconSize() < K3Icon::SizeLarge;
 413 }
 414
 415 bool DolphinDetailsView::isZoomOutPossible() const
 416 {
 417     DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 418     return settings->iconSize() > K3Icon::SizeSmall;
 419 }
 420
 421 void DolphinDetailsView::updateDecorationSize()
 422 {
 423     DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 424     const int iconSize = settings->iconSize();
 425     m_viewOptions.decorationSize = QSize(iconSize, iconSize);
 426
 427     m_controller->setZoomInPossible(isZoomInPossible());
 428     m_controller->setZoomOutPossible(isZoomOutPossible());
 429
 430     doItemsLayout();
 431 }
 432
 433 QPoint DolphinDetailsView::contentsPos() const
 434 {
 435     // implementation note: the horizonal position is ignored currently, as no
 436     // horizontal scrolling is done anyway during a selection
 437     const QScrollBar* scrollbar = verticalScrollBar();
 438     Q_ASSERT(scrollbar != 0);
 439
 440     const int maxHeight = maximumViewportSize().height();
 441     const int height = scrollbar->maximum() - scrollbar->minimum() + 1;
 442     const int visibleHeight = model()->rowCount() + 1 - height;
 443     if (visibleHeight <= 0) {
 444         return QPoint(0, 0);
 445     }
 446
 447     const int y = scrollbar->sliderPosition() * maxHeight / visibleHeight;
 448     return QPoint(0, y);
 449 }
 450
 451 QRect DolphinDetailsView::elasticBandRect() const
 452 {
 453     const QPoint pos(contentsPos());
 454     const QPoint topLeft(m_elasticBandOrigin.x() - pos.x(), m_elasticBandOrigin.y() - pos.y());
 455     return QRect(topLeft, m_elasticBandDestination).normalized();
 456 }
 457
 458 static bool isValidNameIndex(const QModelIndex& index)
 459 {
 460     return index.isValid() && (index.column() == KDirModel::Name);
 461 }
 462
 463 #include "dolphindetailsview.moc"