src/kitemviews/kitemlistcontroller.cpp

   1 /***************************************************************************
   2  *   Copyright (C) 2011 by Peter Penz <peter.penz19@gmail.com>             *
   3  *                                                                         *
   4  *   Based on the Itemviews NG project from Trolltech Labs:                *
   5  *   http://qt.gitorious.org/qt-labs/itemviews-ng                          *
   6  *                                                                         *
   7  *   This program is free software; you can redistribute it and/or modify  *
   8  *   it under the terms of the GNU General Public License as published by  *
   9  *   the Free Software Foundation; either version 2 of the License, or     *
  10  *   (at your option) any later version.                                   *
  11  *                                                                         *
  12  *   This program is distributed in the hope that it will be useful,       *
  13  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  14  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  15  *   GNU General Public License for more details.                          *
  16  *                                                                         *
  17  *   You should have received a copy of the GNU General Public License     *
  18  *   along with this program; if not, write to the                         *
  19  *   Free Software Foundation, Inc.,                                       *
  20  *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA            *
  21  ***************************************************************************/
  22
  23 #include "kitemlistcontroller.h"
  24
  25 #include "kitemlistview.h"
  26 #include "kitemlistrubberband_p.h"
  27 #include "kitemlistselectionmanager.h"
  28
  29 #include <QApplication>
  30 #include <QDrag>
  31 #include <QEvent>
  32 #include <QGraphicsSceneEvent>
  33 #include <QMimeData>
  34
  35 #include <KGlobalSettings>
  36 #include <KDebug>
  37
  38 KItemListController::KItemListController(QObject* parent) :
  39     QObject(parent),
  40     m_dragging(false),
  41     m_selectionBehavior(NoSelection),
  42     m_model(0),
  43     m_view(0),
  44     m_selectionManager(new KItemListSelectionManager(this)),
  45     m_pressedIndex(-1),
  46     m_pressedMousePos(),
  47     m_oldSelection()
  48 {
  49 }
  50
  51 KItemListController::~KItemListController()
  52 {
  53 }
  54
  55 void KItemListController::setModel(KItemModelBase* model)
  56 {
  57     if (m_model == model) {
  58         return;
  59     }
  60
  61     KItemModelBase* oldModel = m_model;
  62     m_model = model;
  63
  64     if (m_view) {
  65         m_view->setModel(m_model);
  66     }
  67
  68     m_selectionManager->setModel(m_model);
  69
  70     emit modelChanged(m_model, oldModel);
  71 }
  72
  73 KItemModelBase* KItemListController::model() const
  74 {
  75     return m_model;
  76 }
  77
  78 KItemListSelectionManager* KItemListController::selectionManager() const
  79 {
  80     return m_selectionManager;
  81 }
  82
  83 void KItemListController::setView(KItemListView* view)
  84 {
  85     if (m_view == view) {
  86         return;
  87     }
  88
  89     KItemListView* oldView = m_view;
  90     if (oldView) {
  91         disconnect(oldView, SIGNAL(offsetChanged(qreal,qreal)), this, SLOT(slotViewOffsetChanged(qreal,qreal)));
  92     }
  93
  94     m_view = view;
  95
  96     if (m_view) {
  97         m_view->setController(this);
  98         m_view->setModel(m_model);
  99         connect(m_view, SIGNAL(offsetChanged(qreal,qreal)), this, SLOT(slotViewOffsetChanged(qreal,qreal)));
 100     }
 101
 102     emit viewChanged(m_view, oldView);
 103 }
 104
 105 KItemListView* KItemListController::view() const
 106 {
 107     return m_view;
 108 }
 109
 110 void KItemListController::setSelectionBehavior(SelectionBehavior behavior)
 111 {
 112     m_selectionBehavior = behavior;
 113 }
 114
 115 KItemListController::SelectionBehavior KItemListController::selectionBehavior() const
 116 {
 117     return m_selectionBehavior;
 118 }
 119
 120 bool KItemListController::showEvent(QShowEvent* event)
 121 {
 122     Q_UNUSED(event);
 123     return false;
 124 }
 125
 126 bool KItemListController::hideEvent(QHideEvent* event)
 127 {
 128     Q_UNUSED(event);
 129     return false;
 130 }
 131
 132 bool KItemListController::keyPressEvent(QKeyEvent* event)
 133 {
 134     const bool shiftPressed = event->modifiers() & Qt::ShiftModifier;
 135     const bool controlPressed = event->modifiers() & Qt::ControlModifier;
 136     const bool shiftOrControlPressed = shiftPressed || controlPressed;
 137
 138     int index = m_selectionManager->currentItem();
 139     const int itemCount = m_model->count();
 140     const int itemsPerRow = m_view->itemsPerOffset();
 141
 142     // For horizontal scroll orientation, transform
 143     // the arrow keys to simplify the event handling.
 144     int key = event->key();
 145     if (m_view->scrollOrientation() == Qt::Horizontal) {
 146         switch (key) {
 147         case Qt::Key_Up:    key = Qt::Key_Left; break;
 148         case Qt::Key_Down:  key = Qt::Key_Right; break;
 149         case Qt::Key_Left:  key = Qt::Key_Up; break;
 150         case Qt::Key_Right: key = Qt::Key_Down; break;
 151         default:            break;
 152         }
 153     }
 154
 155     switch (key) {
 156     case Qt::Key_Home:
 157         index = 0;
 158         break;
 159
 160     case Qt::Key_End:
 161         index = itemCount - 1;
 162         break;
 163
 164     case Qt::Key_Left:
 165         if (index > 0) {
 166             index--;
 167         }
 168         break;
 169
 170     case Qt::Key_Right:
 171         if (index < itemCount - 1) {
 172             index++;
 173         }
 174         break;
 175
 176     case Qt::Key_Up:
 177         if (index >= itemsPerRow) {
 178             index -= itemsPerRow;
 179         }
 180         break;
 181
 182     case Qt::Key_Down:
 183         if (index + itemsPerRow < itemCount) {
 184             // We are not in the last row yet.
 185             index += itemsPerRow;
 186         }
 187         else {
 188             // We are either in the last row already, or we are in the second-last row,
 189             // and there is no item below the current item.
 190             // In the latter case, we jump to the very last item.
 191             const int currentColumn = index % itemsPerRow;
 192             const int lastItemColumn = (itemCount - 1) % itemsPerRow;
 193             const bool inLastRow = currentColumn < lastItemColumn;
 194             if (!inLastRow) {
 195                 index = itemCount - 1;
 196             }
 197         }
 198         break;
 199
 200     case Qt::Key_Space:
 201         if (controlPressed) {
 202             m_selectionManager->endAnchoredSelection();
 203             m_selectionManager->setSelected(index, 1, KItemListSelectionManager::Toggle);
 204             m_selectionManager->beginAnchoredSelection(index);
 205         }
 206
 207     default:
 208         break;
 209     }
 210
 211     if (m_selectionManager->currentItem() != index) {
 212         if (controlPressed) {
 213             m_selectionManager->endAnchoredSelection();
 214         }
 215
 216         m_selectionManager->setCurrentItem(index);
 217
 218         if (!shiftOrControlPressed || m_selectionBehavior == SingleSelection) {
 219             m_selectionManager->clearSelection();
 220             m_selectionManager->setSelected(index, 1);
 221         }
 222
 223         if (!shiftPressed) {
 224             m_selectionManager->beginAnchoredSelection(index);
 225         }
 226     }
 227     return true;
 228 }
 229
 230 bool KItemListController::inputMethodEvent(QInputMethodEvent* event)
 231 {
 232     Q_UNUSED(event);
 233     return false;
 234 }
 235
 236 bool KItemListController::mousePressEvent(QGraphicsSceneMouseEvent* event, const QTransform& transform)
 237 {
 238     if (!m_view) {
 239         return false;
 240     }
 241
 242     m_dragging = false;
 243     m_pressedMousePos = transform.map(event->pos());
 244     m_pressedIndex = m_view->itemAt(m_pressedMousePos);
 245
 246     if (m_view->isAboveExpansionToggle(m_pressedIndex, m_pressedMousePos)) {
 247         m_selectionManager->setCurrentItem(m_pressedIndex);
 248         return true;
 249     }
 250
 251     const bool shiftPressed = event->modifiers() & Qt::ShiftModifier;
 252     const bool controlPressed = event->modifiers() & Qt::ControlModifier;
 253
 254     if (m_selectionBehavior == SingleSelection) {
 255         m_selectionManager->clearSelection();
 256     }
 257
 258     if (!shiftPressed) {
 259         // Finish the anchored selection before the current index is changed
 260         m_selectionManager->endAnchoredSelection();
 261     }
 262
 263     if (m_pressedIndex >= 0) {
 264         m_selectionManager->setCurrentItem(m_pressedIndex);
 265
 266         switch (m_selectionBehavior) {
 267         case NoSelection:
 268             break;
 269
 270         case SingleSelection:
 271             m_selectionManager->setSelected(m_pressedIndex);
 272             break;
 273
 274         case MultiSelection:
 275             if (controlPressed) {
 276                 m_selectionManager->setSelected(m_pressedIndex, 1, KItemListSelectionManager::Toggle);
 277                 m_selectionManager->beginAnchoredSelection(m_pressedIndex);
 278             } else if (!shiftPressed || !m_selectionManager->isAnchoredSelectionActive()) {
 279                 // Select the pressed item and start a new anchored selection
 280                 m_selectionManager->setSelected(m_pressedIndex, 1, KItemListSelectionManager::Select);
 281                 m_selectionManager->beginAnchoredSelection(m_pressedIndex);
 282             }
 283             break;
 284
 285         default:
 286             Q_ASSERT(false);
 287             break;
 288         }
 289
 290         return true;
 291     } else {
 292         KItemListRubberBand* rubberBand = m_view->rubberBand();
 293         QPointF startPos = m_pressedMousePos;
 294         if (m_view->scrollOrientation() == Qt::Vertical) {
 295             startPos.ry() += m_view->offset();
 296             if (m_view->itemSize().width() < 0) {
 297                 // Use a special rubberband for views that have only one column and
 298                 // expand the rubberband to use the whole width of the view.
 299                 startPos.setX(0);
 300             }
 301         } else {
 302             startPos.rx() += m_view->offset();
 303         }
 304
 305         m_oldSelection = m_selectionManager->selectedItems();
 306         rubberBand->setStartPosition(startPos);
 307         rubberBand->setEndPosition(startPos);
 308         rubberBand->setActive(true);
 309         connect(rubberBand, SIGNAL(endPositionChanged(QPointF,QPointF)), this, SLOT(slotRubberBandChanged()));
 310         m_view->setAutoScroll(true);
 311     }
 312
 313     return false;
 314 }
 315
 316 bool KItemListController::mouseMoveEvent(QGraphicsSceneMouseEvent* event, const QTransform& transform)
 317 {
 318     if (!m_view) {
 319         return false;
 320     }
 321
 322     if (m_pressedIndex >= 0) {
 323         // Check whether a dragging should be started
 324         if (!m_dragging && (event->buttons() & Qt::LeftButton)) {
 325             const QPointF pos = transform.map(event->pos());
 326             const qreal minDragDiff = 4;
 327             const bool hasMinDragDiff = qAbs(pos.x() - m_pressedMousePos.x()) >= minDragDiff ||
 328                                         qAbs(pos.y() - m_pressedMousePos.y()) >= minDragDiff;
 329             if (hasMinDragDiff && startDragging()) {
 330                 m_dragging = true;
 331             }
 332         }
 333     } else {
 334         KItemListRubberBand* rubberBand = m_view->rubberBand();
 335         if (rubberBand->isActive()) {
 336             QPointF endPos = transform.map(event->pos());
 337             if (m_view->scrollOrientation() == Qt::Vertical) {
 338                 endPos.ry() += m_view->offset();
 339                 if (m_view->itemSize().width() < 0) {
 340                     // Use a special rubberband for views that have only one column and
 341                     // expand the rubberband to use the whole width of the view.
 342                     endPos.setX(m_view->size().width());
 343                 }
 344             } else {
 345                 endPos.rx() += m_view->offset();
 346             }
 347             rubberBand->setEndPosition(endPos);
 348         }
 349     }
 350
 351     return false;
 352 }
 353
 354 bool KItemListController::mouseReleaseEvent(QGraphicsSceneMouseEvent* event, const QTransform& transform)
 355 {
 356     if (!m_view) {
 357         return false;
 358     }
 359
 360     const bool shiftOrControlPressed = event->modifiers() & Qt::ShiftModifier ||
 361                                        event->modifiers() & Qt::ControlModifier;
 362
 363     bool clearSelection = !shiftOrControlPressed && !m_dragging && !(event->button() == Qt::RightButton);
 364
 365     KItemListRubberBand* rubberBand = m_view->rubberBand();
 366     if (rubberBand->isActive()) {
 367         disconnect(rubberBand, SIGNAL(endPositionChanged(QPointF,QPointF)), this, SLOT(slotRubberBandChanged()));
 368         rubberBand->setActive(false);
 369         m_oldSelection.clear();
 370         m_view->setAutoScroll(false);
 371
 372         if (rubberBand->startPosition() != rubberBand->endPosition()) {
 373             clearSelection = false;
 374         }
 375     }
 376
 377     const QPointF pos = transform.map(event->pos());
 378     const int index = m_view->itemAt(pos);
 379
 380     if (index >= 0 && index == m_pressedIndex) {
 381         // The release event is done above the same item as the press event
 382
 383         if (clearSelection) {
 384             // Clear the previous selection but reselect the current index
 385             m_selectionManager->setSelectedItems(QSet<int>() << index);
 386         }
 387
 388         bool emitItemClicked = true;
 389         if (event->button() & Qt::LeftButton) {
 390             if (m_view->isAboveExpansionToggle(index, pos)) {
 391                 emit itemExpansionToggleClicked(index);
 392                 emitItemClicked = false;
 393             } else if (shiftOrControlPressed || !KGlobalSettings::singleClick()) {
 394                 emitItemClicked = false;
 395             }
 396         }
 397
 398         if (emitItemClicked) {
 399             emit itemClicked(index, event->button());
 400         }
 401     } else if (clearSelection) {
 402         m_selectionManager->clearSelection();
 403     }
 404
 405     m_dragging = false;
 406     m_pressedMousePos = QPointF();
 407     m_pressedIndex = -1;
 408     return false;
 409 }
 410
 411 bool KItemListController::mouseDoubleClickEvent(QGraphicsSceneMouseEvent* event, const QTransform& transform)
 412 {
 413     const QPointF pos = transform.map(event->pos());
 414     const int index = m_view->itemAt(pos);
 415
 416     bool emitItemClicked = !KGlobalSettings::singleClick() &&
 417                            (event->button() & Qt::LeftButton) &&
 418                            index >= 0 && index < m_model->count();
 419     if (emitItemClicked) {
 420         emit itemClicked(index, event->button());
 421     }
 422     return false;
 423 }
 424
 425 bool KItemListController::dragEnterEvent(QGraphicsSceneDragDropEvent* event, const QTransform& transform)
 426 {
 427     Q_UNUSED(event);
 428     Q_UNUSED(transform);
 429     return false;
 430 }
 431
 432 bool KItemListController::dragLeaveEvent(QGraphicsSceneDragDropEvent* event, const QTransform& transform)
 433 {
 434     Q_UNUSED(event);
 435     Q_UNUSED(transform);
 436     return false;
 437 }
 438
 439 bool KItemListController::dragMoveEvent(QGraphicsSceneDragDropEvent* event, const QTransform& transform)
 440 {
 441     Q_UNUSED(event);
 442     Q_UNUSED(transform);
 443     return false;
 444 }
 445
 446 bool KItemListController::dropEvent(QGraphicsSceneDragDropEvent* event, const QTransform& transform)
 447 {
 448     Q_UNUSED(event);
 449     Q_UNUSED(transform);
 450
 451     m_dragging = false;
 452     return false;
 453 }
 454
 455 bool KItemListController::hoverEnterEvent(QGraphicsSceneHoverEvent* event, const QTransform& transform)
 456 {
 457     Q_UNUSED(event);
 458     Q_UNUSED(transform);
 459     return false;
 460 }
 461
 462 bool KItemListController::hoverMoveEvent(QGraphicsSceneHoverEvent* event, const QTransform& transform)
 463 {
 464     // The implementation assumes that only one item can get hovered no matter
 465     // whether they overlap or not.
 466
 467     Q_UNUSED(transform);
 468     if (!m_model || !m_view) {
 469         return false;
 470     }
 471
 472     // Search the previously hovered item that might get unhovered
 473     KItemListWidget* unhoveredWidget = 0;
 474     foreach (KItemListWidget* widget, m_view->visibleItemListWidgets()) {
 475         if (widget->isHovered()) {
 476             unhoveredWidget = widget;
 477             break;
 478         }
 479     }
 480
 481     // Search the currently hovered item
 482     KItemListWidget* hoveredWidget = 0;
 483     foreach (KItemListWidget* widget, m_view->visibleItemListWidgets()) {
 484         const QPointF mappedPos = widget->mapFromItem(m_view, event->pos());
 485
 486         const bool hovered = widget->contains(mappedPos) &&
 487                              !widget->expansionToggleRect().contains(mappedPos) &&
 488                              !widget->selectionToggleRect().contains(mappedPos);
 489         if (hovered) {
 490             hoveredWidget = widget;
 491             break;
 492         }
 493     }
 494
 495     if (unhoveredWidget != hoveredWidget) {
 496         if (unhoveredWidget) {
 497             unhoveredWidget->setHovered(false);
 498             emit itemUnhovered(unhoveredWidget->index());
 499         }
 500
 501         if (hoveredWidget) {
 502             hoveredWidget->setHovered(true);
 503             emit itemHovered(hoveredWidget->index());
 504         }
 505     }
 506
 507     return false;
 508 }
 509
 510 bool KItemListController::hoverLeaveEvent(QGraphicsSceneHoverEvent* event, const QTransform& transform)
 511 {
 512     Q_UNUSED(event);
 513     Q_UNUSED(transform);
 514
 515     if (!m_model || !m_view) {
 516         return false;
 517     }
 518
 519     foreach (KItemListWidget* widget, m_view->visibleItemListWidgets()) {
 520         if (widget->isHovered()) {
 521             widget->setHovered(false);
 522             emit itemUnhovered(widget->index());
 523         }
 524     }
 525     return false;
 526 }
 527
 528 bool KItemListController::wheelEvent(QGraphicsSceneWheelEvent* event, const QTransform& transform)
 529 {
 530     Q_UNUSED(event);
 531     Q_UNUSED(transform);
 532     return false;
 533 }
 534
 535 bool KItemListController::resizeEvent(QGraphicsSceneResizeEvent* event, const QTransform& transform)
 536 {
 537     Q_UNUSED(event);
 538     Q_UNUSED(transform);
 539     return false;
 540 }
 541
 542 bool KItemListController::processEvent(QEvent* event, const QTransform& transform)
 543 {
 544     if (!event) {
 545         return false;
 546     }
 547
 548     switch (event->type()) {
 549     case QEvent::KeyPress:
 550         return keyPressEvent(static_cast<QKeyEvent*>(event));
 551     case QEvent::InputMethod:
 552         return inputMethodEvent(static_cast<QInputMethodEvent*>(event));
 553     case QEvent::GraphicsSceneMousePress:
 554         return mousePressEvent(static_cast<QGraphicsSceneMouseEvent*>(event), QTransform());
 555     case QEvent::GraphicsSceneMouseMove:
 556         return mouseMoveEvent(static_cast<QGraphicsSceneMouseEvent*>(event), QTransform());
 557     case QEvent::GraphicsSceneMouseRelease:
 558         return mouseReleaseEvent(static_cast<QGraphicsSceneMouseEvent*>(event), QTransform());
 559     case QEvent::GraphicsSceneMouseDoubleClick:
 560         return mouseDoubleClickEvent(static_cast<QGraphicsSceneMouseEvent*>(event), QTransform());
 561     case QEvent::GraphicsSceneWheel:
 562          return wheelEvent(static_cast<QGraphicsSceneWheelEvent*>(event), QTransform());
 563     case QEvent::GraphicsSceneDragEnter:
 564         return dragEnterEvent(static_cast<QGraphicsSceneDragDropEvent*>(event), QTransform());
 565     case QEvent::GraphicsSceneDragLeave:
 566         return dragLeaveEvent(static_cast<QGraphicsSceneDragDropEvent*>(event), QTransform());
 567     case QEvent::GraphicsSceneDragMove:
 568         return dragMoveEvent(static_cast<QGraphicsSceneDragDropEvent*>(event), QTransform());
 569     case QEvent::GraphicsSceneDrop:
 570         return dropEvent(static_cast<QGraphicsSceneDragDropEvent*>(event), QTransform());
 571     case QEvent::GraphicsSceneHoverEnter:
 572         return hoverEnterEvent(static_cast<QGraphicsSceneHoverEvent*>(event), QTransform());
 573     case QEvent::GraphicsSceneHoverMove:
 574         return hoverMoveEvent(static_cast<QGraphicsSceneHoverEvent*>(event), QTransform());
 575     case QEvent::GraphicsSceneHoverLeave:
 576         return hoverLeaveEvent(static_cast<QGraphicsSceneHoverEvent*>(event), QTransform());
 577     case QEvent::GraphicsSceneResize:
 578         return resizeEvent(static_cast<QGraphicsSceneResizeEvent*>(event), transform);
 579     default:
 580         break;
 581     }
 582
 583     return false;
 584 }
 585
 586 void KItemListController::slotViewOffsetChanged(qreal current, qreal previous)
 587 {
 588     if (!m_view) {
 589         return;
 590     }
 591
 592     KItemListRubberBand* rubberBand = m_view->rubberBand();
 593     if (rubberBand->isActive()) {
 594         const qreal diff = current - previous;
 595         // TODO: Ideally just QCursor::pos() should be used as
 596         // new end-position but it seems there is no easy way
 597         // to have something like QWidget::mapFromGlobal() for QGraphicsWidget
 598         // (... or I just missed an easy way to do the mapping)
 599         QPointF endPos = rubberBand->endPosition();
 600         if (m_view->scrollOrientation() == Qt::Vertical) {
 601             endPos.ry() += diff;
 602         } else {
 603             endPos.rx() += diff;
 604         }
 605
 606         rubberBand->setEndPosition(endPos);
 607     }
 608 }
 609
 610 void KItemListController::slotRubberBandChanged()
 611 {
 612     if (!m_view || !m_model || m_model->count() <= 0) {
 613         return;
 614     }
 615
 616     const KItemListRubberBand* rubberBand = m_view->rubberBand();
 617     const QPointF startPos = rubberBand->startPosition();
 618     const QPointF endPos = rubberBand->endPosition();
 619     QRectF rubberBandRect = QRectF(startPos, endPos).normalized();
 620
 621     const bool scrollVertical = (m_view->scrollOrientation() == Qt::Vertical);
 622     if (scrollVertical) {
 623         rubberBandRect.translate(0, -m_view->offset());
 624     } else {
 625         rubberBandRect.translate(-m_view->offset(), 0);
 626     }
 627
 628     if (!m_oldSelection.isEmpty()) {
 629         // Clear the old selection that was available before the rubberband has
 630         // been activated in case if no Shift- or Control-key are pressed
 631         const bool shiftOrControlPressed = QApplication::keyboardModifiers() & Qt::ShiftModifier ||
 632                                            QApplication::keyboardModifiers() & Qt::ControlModifier;
 633         if (!shiftOrControlPressed) {
 634             m_oldSelection.clear();
 635         }
 636     }
 637
 638     QSet<int> selectedItems;
 639
 640     // Select all visible items that intersect with the rubberband
 641     foreach (const KItemListWidget* widget, m_view->visibleItemListWidgets()) {
 642         const int index = widget->index();
 643
 644         const QRectF widgetRect = m_view->itemBoundingRect(index);
 645         if (widgetRect.intersects(rubberBandRect)) {
 646             const QRectF iconRect = widget->iconBoundingRect().translated(widgetRect.topLeft());
 647             const QRectF textRect = widget->textBoundingRect().translated(widgetRect.topLeft());
 648             if (iconRect.intersects(rubberBandRect) || textRect.intersects(rubberBandRect)) {
 649                 selectedItems.insert(index);
 650             }
 651         }
 652     }
 653
 654     // Select all invisible items that intersect with the rubberband. Instead of
 655     // iterating all items only the area which might be touched by the rubberband
 656     // will be checked.
 657     const bool increaseIndex = scrollVertical ?
 658                                startPos.y() > endPos.y(): startPos.x() > endPos.x();
 659
 660     int index = increaseIndex ? m_view->lastVisibleIndex() + 1 : m_view->firstVisibleIndex() - 1;
 661     bool selectionFinished = false;
 662     do {
 663         const QRectF widgetRect = m_view->itemBoundingRect(index);
 664         if (widgetRect.intersects(rubberBandRect)) {
 665             selectedItems.insert(index);
 666         }
 667
 668         if (increaseIndex) {
 669             ++index;
 670             selectionFinished = (index >= m_model->count()) ||
 671                                 ( scrollVertical && widgetRect.top()  > rubberBandRect.bottom()) ||
 672                                 (!scrollVertical && widgetRect.left() > rubberBandRect.right());
 673         } else {
 674             --index;
 675             selectionFinished = (index < 0) ||
 676                                 ( scrollVertical && widgetRect.bottom() < rubberBandRect.top()) ||
 677                                 (!scrollVertical && widgetRect.right()  < rubberBandRect.left());
 678         }
 679     } while (!selectionFinished);
 680
 681     m_selectionManager->setSelectedItems(selectedItems + m_oldSelection);
 682 }
 683
 684 bool KItemListController::startDragging()
 685 {
 686     if (!m_view || !m_model) {
 687         return false;
 688     }
 689
 690     const QSet<int> selectedItems = m_selectionManager->selectedItems();
 691     QMimeData* data = m_model->createMimeData(selectedItems);
 692     if (!data) {
 693         return false;
 694     }
 695
 696     // The created drag object will be owned and deleted
 697     // by QApplication::activeWindow().
 698     QDrag* drag = new QDrag(QApplication::activeWindow());
 699     drag->setMimeData(data);
 700
 701     const QPixmap pixmap = m_view->createDragPixmap(selectedItems);
 702     drag->setPixmap(pixmap);
 703
 704     drag->exec(Qt::MoveAction | Qt::CopyAction | Qt::LinkAction, Qt::IgnoreAction);
 705     return true;
 706 }
 707
 708 #include "kitemlistcontroller.moc"