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     updateDecorationSize();
 112 }
 113
 114 DolphinDetailsView::~DolphinDetailsView()
 115 {
 116 }
 117
 118 bool DolphinDetailsView::event(QEvent* event)
 119 {
 120     if (event->type() == QEvent::Polish) {
 121         // Assure that by respecting the available width that:
 122         // - the 'Name' column is stretched as large as possible
 123         // - the remaining columns are as small as possible
 124         QHeaderView* headerView = header();
 125         headerView->setStretchLastSection(false);
 126         headerView->setResizeMode(QHeaderView::ResizeToContents);
 127         headerView->setResizeMode(0, QHeaderView::Stretch);
 128         headerView->setMovable(false);
 129
 130         // hide columns if this is indicated by the settings
 131         const DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 132         Q_ASSERT(settings != 0);
 133         if (!settings->showDate()) {
 134             hideColumn(DolphinModel::ModifiedTime);
 135         }
 136
 137         if (!settings->showPermissions()) {
 138             hideColumn(DolphinModel::Permissions);
 139         }
 140
 141         if (!settings->showOwner()) {
 142             hideColumn(DolphinModel::Owner);
 143         }
 144
 145         if (!settings->showGroup()) {
 146             hideColumn(DolphinModel::Group);
 147         }
 148
 149         if (!settings->showType()) {
 150             hideColumn(DolphinModel::Type);
 151         }
 152
 153         hideColumn(DolphinModel::Rating);
 154         hideColumn(DolphinModel::Tags);
 155     }
 156
 157     return QTreeView::event(event);
 158 }
 159
 160 QStyleOptionViewItem DolphinDetailsView::viewOptions() const
 161 {
 162     return m_viewOptions;
 163 }
 164
 165 void DolphinDetailsView::contextMenuEvent(QContextMenuEvent* event)
 166 {
 167     QTreeView::contextMenuEvent(event);
 168     m_controller->triggerContextMenuRequest(event->pos());
 169 }
 170
 171 void DolphinDetailsView::mousePressEvent(QMouseEvent* event)
 172 {
 173     m_controller->triggerActivation();
 174
 175     QTreeView::mousePressEvent(event);
 176
 177     const QModelIndex index = indexAt(event->pos());
 178     if (!index.isValid() || (index.column() != DolphinModel::Name)) {
 179         const Qt::KeyboardModifiers modifier = QApplication::keyboardModifiers();
 180         if (!(modifier & Qt::ShiftModifier) && !(modifier & Qt::ControlModifier)) {
 181             clearSelection();
 182         }
 183     }
 184
 185     if (event->button() == Qt::LeftButton) {
 186         m_showElasticBand = true;
 187
 188         const QPoint pos(contentsPos());
 189         m_elasticBandOrigin = event->pos();
 190         m_elasticBandOrigin.setX(m_elasticBandOrigin.x() + pos.x());
 191         m_elasticBandOrigin.setY(m_elasticBandOrigin.y() + pos.y());
 192         m_elasticBandDestination = event->pos();
 193     }
 194 }
 195
 196 void DolphinDetailsView::mouseMoveEvent(QMouseEvent* event)
 197 {
 198     QTreeView::mouseMoveEvent(event);
 199     if (m_showElasticBand) {
 200         updateElasticBand();
 201     }
 202 }
 203
 204 void DolphinDetailsView::mouseReleaseEvent(QMouseEvent* event)
 205 {
 206     QTreeView::mouseReleaseEvent(event);
 207     if (m_showElasticBand) {
 208         updateElasticBand();
 209         m_showElasticBand = false;
 210     }
 211 }
 212
 213 void DolphinDetailsView::dragEnterEvent(QDragEnterEvent* event)
 214 {
 215     if (event->mimeData()->hasUrls()) {
 216         event->acceptProposedAction();
 217     }
 218
 219     if (m_showElasticBand) {
 220         updateElasticBand();
 221         m_showElasticBand = false;
 222     }
 223     m_dragging = true;
 224 }
 225
 226 void DolphinDetailsView::dragLeaveEvent(QDragLeaveEvent* event)
 227 {
 228     QTreeView::dragLeaveEvent(event);
 229
 230     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 231     m_dragging = false;
 232     setDirtyRegion(m_dropRect);
 233 }
 234
 235 void DolphinDetailsView::dragMoveEvent(QDragMoveEvent* event)
 236 {
 237     QTreeView::dragMoveEvent(event);
 238
 239     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 240     setDirtyRegion(m_dropRect);
 241     const QModelIndex index = indexAt(event->pos());
 242     if (!index.isValid() || (index.column() != DolphinModel::Name)) {
 243         m_dragging = false;
 244     } else {
 245         m_dragging = true;
 246         m_dropRect = visualRect(index);
 247         setDirtyRegion(m_dropRect);
 248     }
 249 }
 250
 251 void DolphinDetailsView::dropEvent(QDropEvent* event)
 252 {
 253     const KUrl::List urls = KUrl::List::fromMimeData(event->mimeData());
 254     if (!urls.isEmpty()) {
 255         event->acceptProposedAction();
 256         m_controller->indicateDroppedUrls(urls,
 257                                           m_controller->url(),
 258                                           indexAt(event->pos()),
 259                                           event->source());
 260     }
 261     QTreeView::dropEvent(event);
 262     m_dragging = false;
 263 }
 264
 265 void DolphinDetailsView::paintEvent(QPaintEvent* event)
 266 {
 267     QTreeView::paintEvent(event);
 268     if (m_showElasticBand) {
 269         // The following code has been taken from QListView
 270         // and adapted to DolphinDetailsView.
 271         // (C) 1992-2007 Trolltech ASA
 272         QStyleOptionRubberBand opt;
 273         opt.initFrom(this);
 274         opt.shape = QRubberBand::Rectangle;
 275         opt.opaque = false;
 276         opt.rect = elasticBandRect();
 277
 278         QPainter painter(viewport());
 279         painter.save();
 280         style()->drawControl(QStyle::CE_RubberBand, &opt, &painter);
 281         painter.restore();
 282     }
 283
 284     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 285     if (m_dragging) {
 286         const QBrush& brush = m_viewOptions.palette.brush(QPalette::Normal, QPalette::Highlight);
 287         DolphinController::drawHoverIndication(viewport(), m_dropRect, brush);
 288     }
 289 }
 290
 291 void DolphinDetailsView::keyPressEvent(QKeyEvent* event)
 292 {
 293     QTreeView::keyPressEvent(event);
 294
 295     const QItemSelectionModel* selModel = selectionModel();
 296     const QModelIndex currentIndex = selModel->currentIndex();
 297     const bool triggerItem = currentIndex.isValid()
 298                              && (event->key() == Qt::Key_Return)
 299                              && (selModel->selectedIndexes().count() <= 1);
 300     if (triggerItem) {
 301         m_controller->triggerItem(currentIndex);
 302     }
 303 }
 304
 305 void DolphinDetailsView::resizeEvent(QResizeEvent* event)
 306 {
 307     QTreeView::resizeEvent(event);
 308
 309     // assure that the width of the name-column does not get too small
 310     const int minWidth = 120;
 311     QHeaderView* headerView = header();
 312     bool useFixedWidth = (headerView->sectionSize(KDirModel::Name) <= minWidth)
 313                          && (headerView->resizeMode(0) != QHeaderView::Fixed);
 314     if (useFixedWidth) {
 315         // the current width of the name-column is too small, hence
 316         // use a fixed size
 317         headerView->setResizeMode(QHeaderView::Fixed);
 318         headerView->setResizeMode(0, QHeaderView::Fixed);
 319         headerView->resizeSection(KDirModel::Name, minWidth);
 320     } else if (headerView->resizeMode(0) != QHeaderView::Stretch) {
 321         // check whether there is enough available viewport width
 322         // to automatically resize the columns
 323         const int availableWidth = viewport()->width();
 324
 325         int headerWidth = 0;
 326         const int count = headerView->count();
 327         for (int i = 0; i < count; ++i) {
 328             headerWidth += headerView->sectionSize(i);
 329         }
 330
 331         if (headerWidth < availableWidth) {
 332             headerView->setResizeMode(QHeaderView::ResizeToContents);
 333             headerView->setResizeMode(0, QHeaderView::Stretch);
 334         }
 335     }
 336 }
 337
 338 void DolphinDetailsView::setSortIndicatorSection(DolphinView::Sorting sorting)
 339 {
 340     QHeaderView* headerView = header();
 341     headerView->setSortIndicator(sorting, headerView->sortIndicatorOrder());
 342 }
 343
 344 void DolphinDetailsView::setSortIndicatorOrder(Qt::SortOrder sortOrder)
 345 {
 346     QHeaderView* headerView = header();
 347     headerView->setSortIndicator(headerView->sortIndicatorSection(), sortOrder);
 348 }
 349
 350 void DolphinDetailsView::synchronizeSortingState(int column)
 351 {
 352     // The sorting has already been changed in QTreeView if this slot is
 353     // invoked, but Dolphin is not informed about this.
 354     DolphinView::Sorting sorting = DolphinSortFilterProxyModel::sortingForColumn(column);
 355     const Qt::SortOrder sortOrder = header()->sortIndicatorOrder();
 356     m_controller->indicateSortingChange(sorting);
 357     m_controller->indicateSortOrderChange(sortOrder);
 358 }
 359
 360 void DolphinDetailsView::slotEntered(const QModelIndex& index)
 361 {
 362     const QPoint pos = viewport()->mapFromGlobal(QCursor::pos());
 363     const int nameColumnWidth = header()->sectionSize(DolphinModel::Name);
 364     if (pos.x() < nameColumnWidth) {
 365         m_controller->emitItemEntered(index);
 366     }
 367     else {
 368         m_controller->emitViewportEntered();
 369     }
 370 }
 371
 372 void DolphinDetailsView::updateElasticBand()
 373 {
 374     Q_ASSERT(m_showElasticBand);
 375     QRect dirtyRegion(elasticBandRect());
 376     m_elasticBandDestination = viewport()->mapFromGlobal(QCursor::pos());
 377     dirtyRegion = dirtyRegion.united(elasticBandRect());
 378     setDirtyRegion(dirtyRegion);
 379 }
 380
 381 void DolphinDetailsView::zoomIn()
 382 {
 383     if (isZoomInPossible()) {
 384         DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 385         switch (settings->iconSize()) {
 386         case KIconLoader::SizeSmall:  settings->setIconSize(KIconLoader::SizeMedium); break;
 387         case KIconLoader::SizeMedium: settings->setIconSize(KIconLoader::SizeLarge); break;
 388         default: Q_ASSERT(false); break;
 389         }
 390         updateDecorationSize();
 391     }
 392 }
 393
 394 void DolphinDetailsView::zoomOut()
 395 {
 396     if (isZoomOutPossible()) {
 397         DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 398         switch (settings->iconSize()) {
 399         case KIconLoader::SizeLarge:  settings->setIconSize(KIconLoader::SizeMedium); break;
 400         case KIconLoader::SizeMedium: settings->setIconSize(KIconLoader::SizeSmall); break;
 401         default: Q_ASSERT(false); break;
 402         }
 403         updateDecorationSize();
 404     }
 405 }
 406
 407 void DolphinDetailsView::slotItemActivated(const QModelIndex& index)
 408 {
 409     if (index.isValid() && (index.column() == KDirModel::Name)) {
 410         m_controller->triggerItem(index);
 411     } else {
 412         clearSelection();
 413         m_controller->emitItemEntered(index);
 414     }
 415 }
 416
 417 void DolphinDetailsView::configureColumns(const QPoint& pos)
 418 {
 419     KMenu popup(this);
 420     popup.addTitle(i18nc("@title:menu", "Columns"));
 421
 422     QHeaderView* headerView = header();
 423     for (int i = DolphinModel::ModifiedTime; i <= DolphinModel::Type; ++i) {
 424         const int logicalIndex = headerView->logicalIndex(i);
 425         const QString text = model()->headerData(i, Qt::Horizontal).toString();
 426         QAction* action = popup.addAction(text);
 427         action->setCheckable(true);
 428         action->setChecked(!headerView->isSectionHidden(logicalIndex));
 429         action->setData(i);
 430     }
 431
 432     QAction* activatedAction = popup.exec(header()->mapToGlobal(pos));
 433     if (activatedAction != 0) {
 434         const bool show = activatedAction->isChecked();
 435         DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 436         Q_ASSERT(settings != 0);
 437
 438         // remember the changed column visibility in the settings
 439         const int columnIndex = activatedAction->data().toInt();
 440         switch (columnIndex) {
 441         case DolphinModel::ModifiedTime: settings->setShowDate(show); break;
 442         case DolphinModel::Permissions:  settings->setShowPermissions(show); break;
 443         case DolphinModel::Owner:        settings->setShowOwner(show); break;
 444         case DolphinModel::Group:        settings->setShowGroup(show); break;
 445         case DolphinModel::Type:         settings->setShowType(show); break;
 446         default: break;
 447         }
 448
 449         // apply the changed column visibility
 450         if (show) {
 451             showColumn(columnIndex);
 452         } else {
 453             hideColumn(columnIndex);
 454         }
 455     }
 456 }
 457
 458 bool DolphinDetailsView::isZoomInPossible() const
 459 {
 460     DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 461     return settings->iconSize() < KIconLoader::SizeLarge;
 462 }
 463
 464 bool DolphinDetailsView::isZoomOutPossible() const
 465 {
 466     DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 467     return settings->iconSize() > KIconLoader::SizeSmall;
 468 }
 469
 470 void DolphinDetailsView::updateDecorationSize()
 471 {
 472     DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 473     const int iconSize = settings->iconSize();
 474     m_viewOptions.decorationSize = QSize(iconSize, iconSize);
 475
 476     m_controller->setZoomInPossible(isZoomInPossible());
 477     m_controller->setZoomOutPossible(isZoomOutPossible());
 478
 479     doItemsLayout();
 480 }
 481
 482 QPoint DolphinDetailsView::contentsPos() const
 483 {
 484     // implementation note: the horizonal position is ignored currently, as no
 485     // horizontal scrolling is done anyway during a selection
 486     const QScrollBar* scrollbar = verticalScrollBar();
 487     Q_ASSERT(scrollbar != 0);
 488
 489     const int maxHeight = maximumViewportSize().height();
 490     const int height = scrollbar->maximum() - scrollbar->minimum() + 1;
 491     const int visibleHeight = model()->rowCount() + 1 - height;
 492     if (visibleHeight <= 0) {
 493         return QPoint(0, 0);
 494     }
 495
 496     const int y = scrollbar->sliderPosition() * maxHeight / visibleHeight;
 497     return QPoint(0, y);
 498 }
 499
 500 QRect DolphinDetailsView::elasticBandRect() const
 501 {
 502     const QPoint pos(contentsPos());
 503     const QPoint topLeft(m_elasticBandOrigin.x() - pos.x(), m_elasticBandOrigin.y() - pos.y());
 504     return QRect(topLeft, m_elasticBandDestination).normalized();
 505 }
 506
 507 static bool isValidNameIndex(const QModelIndex& index)
 508 {
 509     return index.isValid() && (index.column() == KDirModel::Name);
 510 }
 511
 512 #include "dolphindetailsview.moc"