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