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