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->setResizeMode(0, QHeaderView::Stretch);
 121
 122         // hide columns if this is indicated by the settings
 123         const DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 124         Q_ASSERT(settings != 0);
 125         if (!settings->showDate()) {
 126             hideColumn(DolphinModel::ModifiedTime);
 127         }
 128
 129         if (!settings->showPermissions()) {
 130             hideColumn(DolphinModel::Permissions);
 131         }
 132
 133         if (!settings->showOwner()) {
 134             hideColumn(DolphinModel::Owner);
 135         }
 136
 137         if (!settings->showGroup()) {
 138             hideColumn(DolphinModel::Group);
 139         }
 140
 141         if (!settings->showType()) {
 142             hideColumn(DolphinModel::Type);
 143         }
 144
 145         hideColumn(DolphinModel::Rating);
 146         hideColumn(DolphinModel::Tags);
 147     }
 148
 149     return QTreeView::event(event);
 150 }
 151
 152 QStyleOptionViewItem DolphinDetailsView::viewOptions() const
 153 {
 154     return m_viewOptions;
 155 }
 156
 157 void DolphinDetailsView::contextMenuEvent(QContextMenuEvent* event)
 158 {
 159     QTreeView::contextMenuEvent(event);
 160     m_controller->triggerContextMenuRequest(event->pos());
 161 }
 162
 163 void DolphinDetailsView::mousePressEvent(QMouseEvent* event)
 164 {
 165     m_controller->triggerActivation();
 166
 167     QTreeView::mousePressEvent(event);
 168
 169     const QModelIndex index = indexAt(event->pos());
 170     if (!index.isValid() || (index.column() != DolphinModel::Name)) {
 171         const Qt::KeyboardModifiers modifier = QApplication::keyboardModifiers();
 172         if (!(modifier & Qt::ShiftModifier) && !(modifier & Qt::ControlModifier)) {
 173             clearSelection();
 174         }
 175     }
 176
 177     if (event->button() == Qt::LeftButton) {
 178         m_showElasticBand = true;
 179
 180         const QPoint pos(contentsPos());
 181         m_elasticBandOrigin = event->pos();
 182         m_elasticBandOrigin.setX(m_elasticBandOrigin.x() + pos.x());
 183         m_elasticBandOrigin.setY(m_elasticBandOrigin.y() + pos.y());
 184         m_elasticBandDestination = event->pos();
 185     }
 186 }
 187
 188 void DolphinDetailsView::mouseMoveEvent(QMouseEvent* event)
 189 {
 190     QTreeView::mouseMoveEvent(event);
 191     if (m_showElasticBand) {
 192         updateElasticBand();
 193     }
 194 }
 195
 196 void DolphinDetailsView::mouseReleaseEvent(QMouseEvent* event)
 197 {
 198     QTreeView::mouseReleaseEvent(event);
 199     if (m_showElasticBand) {
 200         updateElasticBand();
 201         m_showElasticBand = false;
 202     }
 203 }
 204
 205 void DolphinDetailsView::dragEnterEvent(QDragEnterEvent* event)
 206 {
 207     if (event->mimeData()->hasUrls()) {
 208         event->acceptProposedAction();
 209     }
 210
 211     if (m_showElasticBand) {
 212         updateElasticBand();
 213         m_showElasticBand = false;
 214     }
 215     m_dragging = true;
 216 }
 217
 218 void DolphinDetailsView::dragLeaveEvent(QDragLeaveEvent* event)
 219 {
 220     QTreeView::dragLeaveEvent(event);
 221
 222     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 223     m_dragging = false;
 224     setDirtyRegion(m_dropRect);
 225 }
 226
 227 void DolphinDetailsView::dragMoveEvent(QDragMoveEvent* event)
 228 {
 229     QTreeView::dragMoveEvent(event);
 230
 231     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 232     setDirtyRegion(m_dropRect);
 233     const QModelIndex index = indexAt(event->pos());
 234     if (!index.isValid() || (index.column() != DolphinModel::Name)) {
 235         m_dragging = false;
 236     } else {
 237         m_dragging = true;
 238         m_dropRect = visualRect(index);
 239         setDirtyRegion(m_dropRect);
 240     }
 241 }
 242
 243 void DolphinDetailsView::dropEvent(QDropEvent* event)
 244 {
 245     const KUrl::List urls = KUrl::List::fromMimeData(event->mimeData());
 246     if (!urls.isEmpty()) {
 247         event->acceptProposedAction();
 248         m_controller->indicateDroppedUrls(urls,
 249                                           m_controller->url(),
 250                                           indexAt(event->pos()),
 251                                           event->source());
 252     }
 253     QTreeView::dropEvent(event);
 254     m_dragging = false;
 255 }
 256
 257 void DolphinDetailsView::paintEvent(QPaintEvent* event)
 258 {
 259     QTreeView::paintEvent(event);
 260     if (m_showElasticBand) {
 261         // The following code has been taken from QListView
 262         // and adapted to DolphinDetailsView.
 263         // (C) 1992-2007 Trolltech ASA
 264         QStyleOptionRubberBand opt;
 265         opt.initFrom(this);
 266         opt.shape = QRubberBand::Rectangle;
 267         opt.opaque = false;
 268         opt.rect = elasticBandRect();
 269
 270         QPainter painter(viewport());
 271         painter.save();
 272         style()->drawControl(QStyle::CE_RubberBand, &opt, &painter);
 273         painter.restore();
 274     }
 275
 276     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 277     if (m_dragging) {
 278         const QBrush& brush = m_viewOptions.palette.brush(QPalette::Normal, QPalette::Highlight);
 279         DolphinController::drawHoverIndication(viewport(), m_dropRect, brush);
 280     }
 281 }
 282
 283 void DolphinDetailsView::keyPressEvent(QKeyEvent* event)
 284 {
 285     QTreeView::keyPressEvent(event);
 286
 287     const QItemSelectionModel* selModel = selectionModel();
 288     const QModelIndex currentIndex = selModel->currentIndex();
 289     const bool triggerItem = currentIndex.isValid()
 290                              && (event->key() == Qt::Key_Return)
 291                              && (selModel->selectedIndexes().count() <= 1);
 292     if (triggerItem) {
 293         m_controller->triggerItem(currentIndex);
 294     }
 295 }
 296
 297 void DolphinDetailsView::resizeEvent(QResizeEvent* event)
 298 {
 299     QTreeView::resizeEvent(event);
 300
 301     // assure that the width of the name-column does not get too small
 302     const int minWidth = 120;
 303     QHeaderView* headerView = header();
 304     bool useFixedWidth = (headerView->sectionSize(KDirModel::Name) <= minWidth)
 305                          && (headerView->resizeMode(0) != QHeaderView::Fixed);
 306     if (useFixedWidth) {
 307         // the current width of the name-column is too small, hence
 308         // use a fixed size
 309         headerView->setResizeMode(QHeaderView::Fixed);
 310         headerView->setResizeMode(0, QHeaderView::Fixed);
 311         headerView->resizeSection(KDirModel::Name, minWidth);
 312     } else if (headerView->resizeMode(0) != QHeaderView::Stretch) {
 313         // check whether there is enough available viewport width
 314         // to automatically resize the columns
 315         const int availableWidth = viewport()->width();
 316
 317         int headerWidth = 0;
 318         const int count = headerView->count();
 319         for (int i = 0; i < count; ++i) {
 320             headerWidth += headerView->sectionSize(i);
 321         }
 322
 323         if (headerWidth < availableWidth) {
 324             headerView->setResizeMode(QHeaderView::ResizeToContents);
 325             headerView->setResizeMode(0, QHeaderView::Stretch);
 326         }
 327     }
 328 }
 329
 330 void DolphinDetailsView::setSortIndicatorSection(DolphinView::Sorting sorting)
 331 {
 332     QHeaderView* headerView = header();
 333     headerView->setSortIndicator(sorting, headerView->sortIndicatorOrder());
 334 }
 335
 336 void DolphinDetailsView::setSortIndicatorOrder(Qt::SortOrder sortOrder)
 337 {
 338     QHeaderView* headerView = header();
 339     headerView->setSortIndicator(headerView->sortIndicatorSection(), sortOrder);
 340 }
 341
 342 void DolphinDetailsView::synchronizeSortingState(int column)
 343 {
 344     // The sorting has already been changed in QTreeView if this slot is
 345     // invoked, but Dolphin is not informed about this.
 346     DolphinView::Sorting sorting = DolphinSortFilterProxyModel::sortingForColumn(column);
 347     const Qt::SortOrder sortOrder = header()->sortIndicatorOrder();
 348     m_controller->indicateSortingChange(sorting);
 349     m_controller->indicateSortOrderChange(sortOrder);
 350 }
 351
 352 void DolphinDetailsView::slotEntered(const QModelIndex& index)
 353 {
 354     const QPoint pos = viewport()->mapFromGlobal(QCursor::pos());
 355     const int nameColumnWidth = header()->sectionSize(DolphinModel::Name);
 356     if (pos.x() < nameColumnWidth) {
 357         m_controller->emitItemEntered(index);
 358     }
 359     else {
 360         m_controller->emitViewportEntered();
 361     }
 362 }
 363
 364 void DolphinDetailsView::updateElasticBand()
 365 {
 366     Q_ASSERT(m_showElasticBand);
 367     QRect dirtyRegion(elasticBandRect());
 368     m_elasticBandDestination = viewport()->mapFromGlobal(QCursor::pos());
 369     dirtyRegion = dirtyRegion.united(elasticBandRect());
 370     setDirtyRegion(dirtyRegion);
 371 }
 372
 373 void DolphinDetailsView::zoomIn()
 374 {
 375     if (isZoomInPossible()) {
 376         DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 377         // TODO: get rid of K3Icon sizes
 378         switch (settings->iconSize()) {
 379         case K3Icon::SizeSmall:  settings->setIconSize(K3Icon::SizeMedium); break;
 380         case K3Icon::SizeMedium: settings->setIconSize(K3Icon::SizeLarge); break;
 381         default: Q_ASSERT(false); break;
 382         }
 383         updateDecorationSize();
 384     }
 385 }
 386
 387 void DolphinDetailsView::zoomOut()
 388 {
 389     if (isZoomOutPossible()) {
 390         DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 391         // TODO: get rid of K3Icon sizes
 392         switch (settings->iconSize()) {
 393         case K3Icon::SizeLarge:  settings->setIconSize(K3Icon::SizeMedium); break;
 394         case K3Icon::SizeMedium: settings->setIconSize(K3Icon::SizeSmall); break;
 395         default: Q_ASSERT(false); break;
 396         }
 397         updateDecorationSize();
 398     }
 399 }
 400
 401 void DolphinDetailsView::slotItemActivated(const QModelIndex& index)
 402 {
 403     if (index.isValid() && (index.column() == KDirModel::Name)) {
 404         m_controller->triggerItem(index);
 405     } else {
 406         clearSelection();
 407         m_controller->emitItemEntered(index);
 408     }
 409 }
 410
 411 bool DolphinDetailsView::isZoomInPossible() const
 412 {
 413     DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 414     return settings->iconSize() < K3Icon::SizeLarge;
 415 }
 416
 417 bool DolphinDetailsView::isZoomOutPossible() const
 418 {
 419     DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 420     return settings->iconSize() > K3Icon::SizeSmall;
 421 }
 422
 423 void DolphinDetailsView::updateDecorationSize()
 424 {
 425     DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 426     const int iconSize = settings->iconSize();
 427     m_viewOptions.decorationSize = QSize(iconSize, iconSize);
 428
 429     m_controller->setZoomInPossible(isZoomInPossible());
 430     m_controller->setZoomOutPossible(isZoomOutPossible());
 431
 432     doItemsLayout();
 433 }
 434
 435 QPoint DolphinDetailsView::contentsPos() const
 436 {
 437     // implementation note: the horizonal position is ignored currently, as no
 438     // horizontal scrolling is done anyway during a selection
 439     const QScrollBar* scrollbar = verticalScrollBar();
 440     Q_ASSERT(scrollbar != 0);
 441
 442     const int maxHeight = maximumViewportSize().height();
 443     const int height = scrollbar->maximum() - scrollbar->minimum() + 1;
 444     const int visibleHeight = model()->rowCount() + 1 - height;
 445     if (visibleHeight <= 0) {
 446         return QPoint(0, 0);
 447     }
 448
 449     const int y = scrollbar->sliderPosition() * maxHeight / visibleHeight;
 450     return QPoint(0, y);
 451 }
 452
 453 QRect DolphinDetailsView::elasticBandRect() const
 454 {
 455     const QPoint pos(contentsPos());
 456     const QPoint topLeft(m_elasticBandOrigin.x() - pos.x(), m_elasticBandOrigin.y() - pos.y());
 457     return QRect(topLeft, m_elasticBandDestination).normalized();
 458 }
 459
 460 static bool isValidNameIndex(const QModelIndex& index)
 461 {
 462     return index.isValid() && (index.column() == KDirModel::Name);
 463 }
 464
 465 #include "dolphindetailsview.moc"