src/dolphincolumnview.cpp

   1 /***************************************************************************
   2  *   Copyright (C) 2007 by Peter Penz <peter.penz@gmx.at>                  *
   3  *                                                                         *
   4  *   This program is free software; you can redistribute it and/or modify  *
   5  *   it under the terms of the GNU General Public License as published by  *
   6  *   the Free Software Foundation; either version 2 of the License, or     *
   7  *   (at your option) any later version.                                   *
   8  *                                                                         *
   9  *   This program is distributed in the hope that it will be useful,       *
  10  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  11  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  12  *   GNU General Public License for more details.                          *
  13  *                                                                         *
  14  *   You should have received a copy of the GNU General Public License     *
  15  *   along with this program; if not, write to the                         *
  16  *   Free Software Foundation, Inc.,                                       *
  17  *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA            *
  18  ***************************************************************************/
  19
  20 #include "dolphincolumnview.h"
  21
  22 #include "dolphincolumnwidget.h"
  23 #include "dolphincontroller.h"
  24 #include "settings/dolphinsettings.h"
  25 #include "zoomlevelinfo.h"
  26
  27 #include "dolphin_columnmodesettings.h"
  28
  29 #include <kfilepreviewgenerator.h>
  30
  31 #include <QPoint>
  32 #include <QScrollBar>
  33 #include <QTimeLine>
  34
  35 DolphinColumnView::DolphinColumnView(QWidget* parent, DolphinController* controller) :
  36     QAbstractItemView(parent),
  37     m_controller(controller),
  38     m_active(false),
  39     m_index(-1),
  40     m_contentX(0),
  41     m_columns(),
  42     m_emptyViewport(0),
  43     m_animation(0),
  44     m_nameFilter()
  45 {
  46     Q_ASSERT(controller != 0);
  47
  48     setAcceptDrops(true);
  49     setDragDropMode(QAbstractItemView::DragDrop);
  50     setDropIndicatorShown(false);
  51     setSelectionMode(ExtendedSelection);
  52     setFocusPolicy(Qt::NoFocus);
  53     setFrameShape(QFrame::NoFrame);
  54     setLayoutDirection(Qt::LeftToRight);
  55
  56     connect(this, SIGNAL(viewportEntered()),
  57             controller, SLOT(emitViewportEntered()));
  58     connect(controller, SIGNAL(zoomLevelChanged(int)),
  59             this, SLOT(setZoomLevel(int)));
  60     connect(controller, SIGNAL(activationChanged(bool)),
  61             this, SLOT(updateColumnsBackground(bool)));
  62     connect(controller, SIGNAL(scrollToCurrentItem()),
  63             this, SLOT(scrollToCurrentItem()));
  64
  65     const DolphinView* view = controller->dolphinView();
  66     connect(view, SIGNAL(sortingChanged(DolphinView::Sorting)),
  67             this, SLOT(slotSortingChanged(DolphinView::Sorting)));
  68     connect(view, SIGNAL(sortOrderChanged(Qt::SortOrder)),
  69             this, SLOT(slotSortOrderChanged(Qt::SortOrder)));
  70     connect(view, SIGNAL(showHiddenFilesChanged()),
  71             this, SLOT(slotShowHiddenFilesChanged()));
  72     connect(view, SIGNAL(showPreviewChanged()),
  73             this, SLOT(slotShowPreviewChanged()));
  74
  75     connect(horizontalScrollBar(), SIGNAL(valueChanged(int)),
  76             this, SLOT(moveContentHorizontally(int)));
  77
  78     m_animation = new QTimeLine(500, this);
  79     connect(m_animation, SIGNAL(frameChanged(int)), horizontalScrollBar(), SLOT(setValue(int)));
  80
  81     DolphinColumnWidget* column = new DolphinColumnWidget(viewport(), this, m_controller->url());
  82     m_columns.append(column);
  83     setActiveColumnIndex(0);
  84
  85     m_emptyViewport = new QFrame(viewport());
  86     m_emptyViewport->setFrameStyle(QFrame::StyledPanel | QFrame::Sunken);
  87
  88     updateDecorationSize(view->showPreview());
  89     updateColumnsBackground(true);
  90 }
  91
  92 DolphinColumnView::~DolphinColumnView()
  93 {
  94 }
  95
  96 QModelIndex DolphinColumnView::indexAt(const QPoint& point) const
  97 {
  98     foreach (DolphinColumnWidget* column, m_columns) {
  99         const QModelIndex index = column->indexAt(columnPosition(column, point));
 100         if (index.isValid()) {
 101             return index;
 102         }
 103     }
 104
 105     return QModelIndex();
 106 }
 107
 108 KFileItem DolphinColumnView::itemAt(const QPoint& point) const
 109 {
 110     foreach (DolphinColumnWidget* column, m_columns) {
 111         KFileItem item = column->itemAt(columnPosition(column, point));
 112         if (!item.isNull()) {
 113             return item;
 114         }
 115     }
 116
 117     return KFileItem();
 118 }
 119
 120 void DolphinColumnView::scrollTo(const QModelIndex& index, ScrollHint hint)
 121 {
 122     activeColumn()->scrollTo(index, hint);
 123 }
 124
 125 QRect DolphinColumnView::visualRect(const QModelIndex& index) const
 126 {
 127     return activeColumn()->visualRect(index);
 128 }
 129
 130 void DolphinColumnView::invertSelection()
 131 {
 132     QItemSelectionModel* selectionModel = activeColumn()->selectionModel();
 133     const QAbstractItemModel* itemModel = selectionModel->model();
 134
 135     const QModelIndex topLeft = itemModel->index(0, 0);
 136     const QModelIndex bottomRight = itemModel->index(itemModel->rowCount() - 1,
 137                                                      itemModel->columnCount() - 1);
 138
 139     const QItemSelection selection(topLeft, bottomRight);
 140     selectionModel->select(selection, QItemSelectionModel::Toggle);
 141 }
 142
 143 void DolphinColumnView::reload()
 144 {
 145     foreach (DolphinColumnWidget* column, m_columns) {
 146         column->reload();
 147     }
 148 }
 149
 150 void DolphinColumnView::setRootUrl(const KUrl& url)
 151 {
 152     removeAllColumns();
 153     m_columns[0]->setUrl(url);
 154 }
 155
 156 void DolphinColumnView::setNameFilter(const QString& nameFilter)
 157 {
 158     if (nameFilter != m_nameFilter) {
 159         m_nameFilter = nameFilter;
 160         foreach (DolphinColumnWidget* column, m_columns) {
 161             column->setNameFilter(nameFilter);
 162         }
 163     }
 164 }
 165
 166 QString DolphinColumnView::nameFilter() const
 167 {
 168     return m_nameFilter;
 169 }
 170
 171 KUrl DolphinColumnView::rootUrl() const
 172 {
 173     return m_columns[0]->url();
 174 }
 175
 176 void DolphinColumnView::showColumn(const KUrl& url)
 177 {
 178     if (!rootUrl().isParentOf(url)) {
 179         setRootUrl(url);
 180         return;
 181     }
 182
 183     int columnIndex = 0;
 184     foreach (DolphinColumnWidget* column, m_columns) {
 185         if (column->url() == url) {
 186             // the column represents already the requested URL, hence activate it
 187             requestActivation(column);
 188             layoutColumns();
 189             return;
 190         } else if (!column->url().isParentOf(url)) {
 191             // the column is no parent of the requested URL, hence
 192             // just delete all remaining columns
 193             if (columnIndex > 0) {
 194                 QList<DolphinColumnWidget*>::iterator start = m_columns.begin() + columnIndex;
 195                 QList<DolphinColumnWidget*>::iterator end = m_columns.end();
 196                 for (QList<DolphinColumnWidget*>::iterator it = start; it != end; ++it) {
 197                     deleteColumn(*it);
 198                 }
 199                 m_columns.erase(start, end);
 200
 201                 const int maxIndex = m_columns.count() - 1;
 202                 Q_ASSERT(maxIndex >= 0);
 203                 if (m_index > maxIndex) {
 204                     m_index = maxIndex;
 205                 }
 206                 break;
 207             }
 208         }
 209         ++columnIndex;
 210     }
 211
 212     // Create missing columns. Assuming that the path is "/home/peter/Temp/" and
 213     // the target path is "/home/peter/Temp/a/b/c/", then the columns "a", "b" and
 214     // "c" will be created.
 215     const int lastIndex = m_columns.count() - 1;
 216     Q_ASSERT(lastIndex >= 0);
 217
 218     const KUrl& activeUrl = m_columns[lastIndex]->url();
 219     Q_ASSERT(activeUrl.isParentOf(url));
 220     Q_ASSERT(activeUrl != url);
 221
 222     QString path = activeUrl.url(KUrl::AddTrailingSlash);
 223     const QString targetPath = url.url(KUrl::AddTrailingSlash);
 224
 225     columnIndex = lastIndex;
 226     int slashIndex = path.count('/');
 227     bool hasSubPath = (slashIndex >= 0);
 228     while (hasSubPath) {
 229         const QString subPath = targetPath.section('/', slashIndex, slashIndex);
 230         if (subPath.isEmpty()) {
 231             hasSubPath = false;
 232         } else {
 233             path += subPath + '/';
 234             ++slashIndex;
 235
 236             const KUrl childUrl = KUrl(path);
 237             m_columns[columnIndex]->setChildUrl(childUrl);
 238             columnIndex++;
 239
 240             DolphinColumnWidget* column = new DolphinColumnWidget(viewport(), this, childUrl);
 241             const QString filter = nameFilter();
 242             if (!filter.isEmpty()) {
 243                 column->setNameFilter(filter);
 244             }
 245             column->setActive(false);
 246
 247             m_columns.append(column);
 248
 249             // Before invoking layoutColumns() the column must be set visible temporary.
 250             // To prevent a flickering the initial geometry is set to a hidden position.
 251             column->setGeometry(QRect(-1, -1, 1, 1));
 252             column->show();
 253             layoutColumns();
 254             updateScrollBar();
 255         }
 256     }
 257
 258     // set the last column as active column without modifying the controller
 259     // and hence the history
 260     activeColumn()->setActive(false);
 261     m_index = columnIndex;
 262     activeColumn()->setActive(true);
 263     assureVisibleActiveColumn();
 264 }
 265
 266 void DolphinColumnView::editItem(const KFileItem& item)
 267 {
 268     activeColumn()->editItem(item);
 269 }
 270
 271 KFileItemList DolphinColumnView::selectedItems() const
 272 {
 273     return activeColumn()->selectedItems();
 274 }
 275
 276 QMimeData* DolphinColumnView::selectionMimeData() const
 277 {
 278     return activeColumn()->selectionMimeData();
 279 }
 280
 281 void DolphinColumnView::selectAll()
 282 {
 283     activeColumn()->selectAll();
 284 }
 285
 286 bool DolphinColumnView::isIndexHidden(const QModelIndex& index) const
 287 {
 288     Q_UNUSED(index);
 289     return false;//activeColumn()->isIndexHidden(index);
 290 }
 291
 292 QModelIndex DolphinColumnView::moveCursor(CursorAction cursorAction, Qt::KeyboardModifiers modifiers)
 293 {
 294     // Parts of this code have been taken from QColumnView::moveCursor().
 295     // Copyright (C) 1992-2007 Trolltech ASA.
 296
 297     Q_UNUSED(modifiers);
 298     if (model() == 0) {
 299         return QModelIndex();
 300     }
 301
 302     const QModelIndex current = currentIndex();
 303     if (isRightToLeft()) {
 304         if (cursorAction == MoveLeft) {
 305             cursorAction = MoveRight;
 306         } else if (cursorAction == MoveRight) {
 307             cursorAction = MoveLeft;
 308         }
 309     }
 310
 311     switch (cursorAction) {
 312     case MoveLeft:
 313         if (m_index > 0) {
 314             setActiveColumnIndex(m_index - 1);
 315             m_controller->triggerUrlChangeRequest(activeColumn()->url());
 316         }
 317         break;
 318
 319     case MoveRight:
 320         if (m_index < m_columns.count() - 1) {
 321             setActiveColumnIndex(m_index + 1);
 322             m_controller->triggerUrlChangeRequest(m_columns[m_index]->url());
 323         }
 324         break;
 325
 326     default:
 327         break;
 328     }
 329
 330     return QModelIndex();
 331 }
 332
 333 void DolphinColumnView::setSelection(const QRect& rect, QItemSelectionModel::SelectionFlags flags)
 334 {
 335     Q_UNUSED(rect);
 336     Q_UNUSED(flags);
 337 }
 338
 339 QRegion DolphinColumnView::visualRegionForSelection(const QItemSelection& selection) const
 340 {
 341     Q_UNUSED(selection);
 342     return QRegion();
 343 }
 344
 345 int DolphinColumnView::horizontalOffset() const
 346 {
 347     return -m_contentX;
 348 }
 349
 350 int DolphinColumnView::verticalOffset() const
 351 {
 352     return 0;
 353 }
 354
 355 void DolphinColumnView::mousePressEvent(QMouseEvent* event)
 356 {
 357     m_controller->requestActivation();
 358     QAbstractItemView::mousePressEvent(event);
 359 }
 360
 361 void DolphinColumnView::resizeEvent(QResizeEvent* event)
 362 {
 363     QAbstractItemView::resizeEvent(event);
 364     layoutColumns();
 365     updateScrollBar();
 366     assureVisibleActiveColumn();
 367 }
 368
 369 void DolphinColumnView::wheelEvent(QWheelEvent* event)
 370 {
 371     // let Ctrl+wheel events propagate to the DolphinView for icon zooming
 372     if ((event->modifiers() & Qt::ControlModifier) == Qt::ControlModifier) {
 373         event->ignore();
 374         return;
 375     }
 376     QAbstractItemView::wheelEvent(event);
 377 }
 378
 379 void DolphinColumnView::setZoomLevel(int level)
 380 {
 381     const int size = ZoomLevelInfo::iconSizeForZoomLevel(level);
 382     ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 383
 384     const bool showPreview = m_controller->dolphinView()->showPreview();
 385     if (showPreview) {
 386         settings->setPreviewSize(size);
 387     } else {
 388         settings->setIconSize(size);
 389     }
 390
 391     updateDecorationSize(showPreview);
 392 }
 393
 394 void DolphinColumnView::moveContentHorizontally(int x)
 395 {
 396     m_contentX = isRightToLeft() ? +x : -x;
 397     layoutColumns();
 398 }
 399
 400 void DolphinColumnView::updateDecorationSize(bool showPreview)
 401 {
 402     ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 403     const int iconSize = showPreview ? settings->previewSize() : settings->iconSize();
 404     const QSize size(iconSize, iconSize);
 405     setIconSize(size);
 406
 407     foreach (QObject* object, viewport()->children()) {
 408         if (object->inherits("QListView")) {
 409             DolphinColumnWidget* widget = static_cast<DolphinColumnWidget*>(object);
 410             widget->setDecorationSize(size);
 411         }
 412     }
 413
 414     doItemsLayout();
 415 }
 416
 417 void DolphinColumnView::updateColumnsBackground(bool active)
 418 {
 419     if (active == m_active) {
 420         return;
 421     }
 422
 423     m_active = active;
 424
 425     // dim the background of the viewport
 426     const QPalette::ColorRole role = viewport()->backgroundRole();
 427     QColor background = viewport()->palette().color(role);
 428     background.setAlpha(0);  // make background transparent
 429
 430     QPalette palette = viewport()->palette();
 431     palette.setColor(role, background);
 432     viewport()->setPalette(palette);
 433
 434     foreach (DolphinColumnWidget* column, m_columns) {
 435         column->updateBackground();
 436     }
 437 }
 438
 439 void DolphinColumnView::slotSortingChanged(DolphinView::Sorting sorting)
 440 {
 441     foreach (DolphinColumnWidget* column, m_columns) {
 442         column->setSorting(sorting);
 443     }
 444 }
 445
 446 void DolphinColumnView::slotSortOrderChanged(Qt::SortOrder order)
 447 {
 448     foreach (DolphinColumnWidget* column, m_columns) {
 449         column->setSortOrder(order);
 450     }
 451 }
 452
 453 void DolphinColumnView::slotShowHiddenFilesChanged()
 454 {
 455     const bool show = m_controller->dolphinView()->showHiddenFiles();
 456     foreach (DolphinColumnWidget* column, m_columns) {
 457         column->setShowHiddenFiles(show);
 458     }
 459 }
 460
 461 void DolphinColumnView::slotShowPreviewChanged()
 462 {
 463     const bool show = m_controller->dolphinView()->showPreview();
 464     updateDecorationSize(show);
 465     foreach (DolphinColumnWidget* column, m_columns) {
 466         column->setShowPreview(show);
 467     }
 468 }
 469
 470 void DolphinColumnView::scrollToCurrentItem()
 471 {
 472     const QModelIndex activeIndex = activeColumn()->currentIndex();
 473     activeColumn()->scrollTo(activeIndex);
 474 }
 475
 476 void DolphinColumnView::setActiveColumnIndex(int index)
 477 {
 478     if (m_index == index) {
 479         return;
 480     }
 481
 482     const bool hasActiveColumn = (m_index >= 0);
 483     if (hasActiveColumn) {
 484         m_columns[m_index]->setActive(false);
 485     }
 486
 487     m_index = index;
 488     m_columns[m_index]->setActive(true);
 489
 490     assureVisibleActiveColumn();
 491 }
 492
 493 void DolphinColumnView::layoutColumns()
 494 {
 495     const int gap = 4;
 496
 497     ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 498     const int columnWidth = settings->columnWidth();
 499
 500     QRect emptyViewportRect;
 501     if (isRightToLeft()) {
 502         int x = viewport()->width() - columnWidth + m_contentX;
 503         foreach (DolphinColumnWidget* column, m_columns) {
 504             column->setGeometry(QRect(x, 0, columnWidth - gap, viewport()->height()));
 505             x -= columnWidth;
 506         }
 507         emptyViewportRect = QRect(0, 0, x + columnWidth - gap, viewport()->height());
 508     } else {
 509         int x = m_contentX;
 510         foreach (DolphinColumnWidget* column, m_columns) {
 511             column->setGeometry(QRect(x, 0, columnWidth - gap, viewport()->height()));
 512             x += columnWidth;
 513         }
 514         emptyViewportRect = QRect(x, 0, viewport()->width() - x - gap, viewport()->height());
 515     }
 516
 517     if (emptyViewportRect.isValid()) {
 518         m_emptyViewport->show();
 519         m_emptyViewport->setGeometry(emptyViewportRect);
 520     } else {
 521         m_emptyViewport->hide();
 522     }
 523 }
 524
 525 void DolphinColumnView::updateScrollBar()
 526 {
 527     ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 528     const int contentWidth = m_columns.count() * settings->columnWidth();
 529
 530     horizontalScrollBar()->setPageStep(contentWidth);
 531     horizontalScrollBar()->setRange(0, contentWidth - viewport()->width());
 532 }
 533
 534 void DolphinColumnView::assureVisibleActiveColumn()
 535 {
 536     const int viewportWidth = viewport()->width();
 537     const int x = activeColumn()->x();
 538
 539     ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 540     const int width = settings->columnWidth();
 541
 542     if (x + width > viewportWidth) {
 543         const int newContentX = m_contentX - x - width + viewportWidth;
 544         if (isRightToLeft()) {
 545             m_animation->setFrameRange(m_contentX, newContentX);
 546         } else {
 547             m_animation->setFrameRange(-m_contentX, -newContentX);
 548         }
 549         if (m_animation->state() != QTimeLine::Running) {
 550            m_animation->start();
 551         }
 552     } else if (x < 0) {
 553         const int newContentX = m_contentX - x;
 554         if (isRightToLeft()) {
 555             m_animation->setFrameRange(m_contentX, newContentX);
 556         } else {
 557             m_animation->setFrameRange(-m_contentX, -newContentX);
 558         }
 559         if (m_animation->state() != QTimeLine::Running) {
 560            m_animation->start();
 561         }
 562     }
 563 }
 564
 565 void DolphinColumnView::requestActivation(DolphinColumnWidget* column)
 566 {
 567     m_controller->setItemView(column);
 568     if (column->isActive()) {
 569         assureVisibleActiveColumn();
 570     } else {
 571         int index = 0;
 572         foreach (DolphinColumnWidget* currColumn, m_columns) {
 573             if (currColumn == column) {
 574                 setActiveColumnIndex(index);
 575                 return;
 576             }
 577             ++index;
 578         }
 579     }
 580 }
 581
 582 void DolphinColumnView::removeAllColumns()
 583 {
 584     QList<DolphinColumnWidget*>::iterator start = m_columns.begin() + 1;
 585     QList<DolphinColumnWidget*>::iterator end = m_columns.end();
 586     for (QList<DolphinColumnWidget*>::iterator it = start; it != end; ++it) {
 587         deleteColumn(*it);
 588     }
 589     m_columns.erase(start, end);
 590     m_index = 0;
 591     m_columns[0]->setActive(true);
 592     assureVisibleActiveColumn();
 593 }
 594
 595 QPoint DolphinColumnView::columnPosition(DolphinColumnWidget* column, const QPoint& point) const
 596 {
 597     const QPoint topLeft = column->frameGeometry().topLeft();
 598     return QPoint(point.x() - topLeft.x(), point.y() - topLeft.y());
 599 }
 600
 601 void DolphinColumnView::deleteColumn(DolphinColumnWidget* column)
 602 {
 603     if (column != 0) {
 604         if (m_controller->itemView() == column) {
 605             m_controller->setItemView(0);
 606         }
 607         // deleteWhenNotDragSource(column) does not necessarily delete column,
 608         // and we want its preview generator destroyed immediately.
 609         column->m_previewGenerator->deleteLater();
 610         column->m_previewGenerator = 0;
 611         column->hide();
 612         // Prevent automatic destruction of column when this DolphinColumnView
 613         // is destroyed.
 614         column->setParent(0);
 615         column->disconnect();
 616         emit requestColumnDeletion(column);
 617     }
 618 }
 619
 620 #include "dolphincolumnview.moc"