src/kitemviews/kitemlistcontroller.cpp

   1 /***************************************************************************
   2  *   Copyright (C) 2011 by Peter Penz <peter.penz19@gmail.com>             *
   3  *   Copyright (C) 2012 by Frank Reininghaus <frank78ac@googlemail.com>    *
   4  *                                                                         *
   5  *   Based on the Itemviews NG project from Trolltech Labs:                *
   6  *   http://qt.gitorious.org/qt-labs/itemviews-ng                          *
   7  *                                                                         *
   8  *   This program is free software; you can redistribute it and/or modify  *
   9  *   it under the terms of the GNU General Public License as published by  *
  10  *   the Free Software Foundation; either version 2 of the License, or     *
  11  *   (at your option) any later version.                                   *
  12  *                                                                         *
  13  *   This program is distributed in the hope that it will be useful,       *
  14  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  15  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  16  *   GNU General Public License for more details.                          *
  17  *                                                                         *
  18  *   You should have received a copy of the GNU General Public License     *
  19  *   along with this program; if not, write to the                         *
  20  *   Free Software Foundation, Inc.,                                       *
  21  *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA            *
  22  ***************************************************************************/
  23
  24 #include "kitemlistcontroller.h"
  25
  26 #include "kitemlistselectionmanager.h"
  27 #include "kitemlistview.h"
  28 #include "private/kitemlistkeyboardsearchmanager.h"
  29 #include "private/kitemlistrubberband.h"
  30 #include "views/draganddrophelper.h"
  31
  32 #include <QAccessible>
  33 #include <QApplication>
  34 #include <QDrag>
  35 #include <QGraphicsScene>
  36 #include <QGraphicsSceneEvent>
  37 #include <QGraphicsView>
  38 #include <QMimeData>
  39 #include <QTimer>
  40
  41 KItemListController::KItemListController(KItemModelBase* model, KItemListView* view, QObject* parent) :
  42     QObject(parent),
  43     m_singleClickActivationEnforced(false),
  44     m_selectionTogglePressed(false),
  45     m_clearSelectionIfItemsAreNotDragged(false),
  46     m_selectionBehavior(NoSelection),
  47     m_autoActivationBehavior(ActivationAndExpansion),
  48     m_mouseDoubleClickAction(ActivateItemOnly),
  49     m_model(nullptr),
  50     m_view(nullptr),
  51     m_selectionManager(new KItemListSelectionManager(this)),
  52     m_keyboardManager(new KItemListKeyboardSearchManager(this)),
  53     m_pressedIndex(-1),
  54     m_pressedMousePos(),
  55     m_autoActivationTimer(nullptr),
  56     m_oldSelection(),
  57     m_keyboardAnchorIndex(-1),
  58     m_keyboardAnchorPos(0)
  59 {
  60     connect(m_keyboardManager, &KItemListKeyboardSearchManager::changeCurrentItem,
  61             this, &KItemListController::slotChangeCurrentItem);
  62     connect(m_selectionManager, &KItemListSelectionManager::currentChanged,
  63             m_keyboardManager, &KItemListKeyboardSearchManager::slotCurrentChanged);
  64
  65     m_autoActivationTimer = new QTimer(this);
  66     m_autoActivationTimer->setSingleShot(true);
  67     m_autoActivationTimer->setInterval(-1);
  68     connect(m_autoActivationTimer, &QTimer::timeout, this, &KItemListController::slotAutoActivationTimeout);
  69
  70     setModel(model);
  71     setView(view);
  72 }
  73
  74 KItemListController::~KItemListController()
  75 {
  76     setView(nullptr);
  77     Q_ASSERT(!m_view);
  78
  79     setModel(nullptr);
  80     Q_ASSERT(!m_model);
  81 }
  82
  83 void KItemListController::setModel(KItemModelBase* model)
  84 {
  85     if (m_model == model) {
  86         return;
  87     }
  88
  89     KItemModelBase* oldModel = m_model;
  90     if (oldModel) {
  91         oldModel->deleteLater();
  92     }
  93
  94     m_model = model;
  95     if (m_model) {
  96         m_model->setParent(this);
  97     }
  98
  99     if (m_view) {
 100         m_view->setModel(m_model);
 101     }
 102
 103     m_selectionManager->setModel(m_model);
 104
 105     emit modelChanged(m_model, oldModel);
 106 }
 107
 108 KItemModelBase* KItemListController::model() const
 109 {
 110     return m_model;
 111 }
 112
 113 KItemListSelectionManager* KItemListController::selectionManager() const
 114 {
 115     return m_selectionManager;
 116 }
 117
 118 void KItemListController::setView(KItemListView* view)
 119 {
 120     if (m_view == view) {
 121         return;
 122     }
 123
 124     KItemListView* oldView = m_view;
 125     if (oldView) {
 126         disconnect(oldView, &KItemListView::scrollOffsetChanged, this, &KItemListController::slotViewScrollOffsetChanged);
 127         oldView->deleteLater();
 128     }
 129
 130     m_view = view;
 131
 132     if (m_view) {
 133         m_view->setParent(this);
 134         m_view->setController(this);
 135         m_view->setModel(m_model);
 136         connect(m_view, &KItemListView::scrollOffsetChanged, this, &KItemListController::slotViewScrollOffsetChanged);
 137         updateExtendedSelectionRegion();
 138     }
 139
 140     emit viewChanged(m_view, oldView);
 141 }
 142
 143 KItemListView* KItemListController::view() const
 144 {
 145     return m_view;
 146 }
 147
 148 void KItemListController::setSelectionBehavior(SelectionBehavior behavior)
 149 {
 150     m_selectionBehavior = behavior;
 151     updateExtendedSelectionRegion();
 152 }
 153
 154 KItemListController::SelectionBehavior KItemListController::selectionBehavior() const
 155 {
 156     return m_selectionBehavior;
 157 }
 158
 159 void KItemListController::setAutoActivationBehavior(AutoActivationBehavior behavior)
 160 {
 161     m_autoActivationBehavior = behavior;
 162 }
 163
 164 KItemListController::AutoActivationBehavior KItemListController::autoActivationBehavior() const
 165 {
 166     return m_autoActivationBehavior;
 167 }
 168
 169 void KItemListController::setMouseDoubleClickAction(MouseDoubleClickAction action)
 170 {
 171     m_mouseDoubleClickAction = action;
 172 }
 173
 174 KItemListController::MouseDoubleClickAction KItemListController::mouseDoubleClickAction() const
 175 {
 176     return m_mouseDoubleClickAction;
 177 }
 178
 179 int KItemListController::indexCloseToMousePressedPosition() const
 180 {
 181     QHashIterator<KItemListWidget*, KItemListGroupHeader*> it(m_view->m_visibleGroups);
 182     while (it.hasNext()) {
 183         it.next();
 184         KItemListGroupHeader *groupHeader = it.value();
 185         const QPointF mappedToGroup = groupHeader->mapFromItem(nullptr, m_pressedMousePos);
 186         if (groupHeader->contains(mappedToGroup)) {
 187             return it.key()->index();
 188         }
 189     }
 190     return -1;
 191 }
 192
 193 void KItemListController::setAutoActivationDelay(int delay)
 194 {
 195     m_autoActivationTimer->setInterval(delay);
 196 }
 197
 198 int KItemListController::autoActivationDelay() const
 199 {
 200     return m_autoActivationTimer->interval();
 201 }
 202
 203 void KItemListController::setSingleClickActivationEnforced(bool singleClick)
 204 {
 205     m_singleClickActivationEnforced = singleClick;
 206 }
 207
 208 bool KItemListController::singleClickActivationEnforced() const
 209 {
 210     return m_singleClickActivationEnforced;
 211 }
 212
 213 bool KItemListController::keyPressEvent(QKeyEvent* event)
 214 {
 215     int index = m_selectionManager->currentItem();
 216     int key = event->key();
 217
 218     // Handle the expanding/collapsing of items
 219     if (m_view->supportsItemExpanding() && m_model->isExpandable(index)) {
 220         if (key == Qt::Key_Right) {
 221             if (m_model->setExpanded(index, true)) {
 222                 return true;
 223             }
 224         } else if (key == Qt::Key_Left) {
 225             if (m_model->setExpanded(index, false)) {
 226                 return true;
 227             }
 228         }
 229     }
 230
 231     const bool shiftPressed = event->modifiers() & Qt::ShiftModifier;
 232     const bool controlPressed = event->modifiers() & Qt::ControlModifier;
 233     const bool shiftOrControlPressed = shiftPressed || controlPressed;
 234
 235     const int itemCount = m_model->count();
 236
 237     // For horizontal scroll orientation, transform
 238     // the arrow keys to simplify the event handling.
 239     if (m_view->scrollOrientation() == Qt::Horizontal) {
 240         switch (key) {
 241         case Qt::Key_Up:    key = Qt::Key_Left; break;
 242         case Qt::Key_Down:  key = Qt::Key_Right; break;
 243         case Qt::Key_Left:  key = Qt::Key_Up; break;
 244         case Qt::Key_Right: key = Qt::Key_Down; break;
 245         default:            break;
 246         }
 247     }
 248
 249     const bool selectSingleItem = m_selectionBehavior != NoSelection &&
 250                                   itemCount == 1 &&
 251                                   (key == Qt::Key_Home || key == Qt::Key_End  ||
 252                                    key == Qt::Key_Up   || key == Qt::Key_Down ||
 253                                    key == Qt::Key_Left || key == Qt::Key_Right);
 254     if (selectSingleItem) {
 255         const int current = m_selectionManager->currentItem();
 256         m_selectionManager->setSelected(current);
 257         return true;
 258     }
 259
 260     switch (key) {
 261     case Qt::Key_Home:
 262         index = 0;
 263         m_keyboardAnchorIndex = index;
 264         m_keyboardAnchorPos = keyboardAnchorPos(index);
 265         break;
 266
 267     case Qt::Key_End:
 268         index = itemCount - 1;
 269         m_keyboardAnchorIndex = index;
 270         m_keyboardAnchorPos = keyboardAnchorPos(index);
 271         break;
 272
 273     case Qt::Key_Left:
 274         if (index > 0) {
 275             const int expandedParentsCount = m_model->expandedParentsCount(index);
 276             if (expandedParentsCount == 0) {
 277                 --index;
 278             } else {
 279                 // Go to the parent of the current item.
 280                 do {
 281                     --index;
 282                 } while (index > 0 && m_model->expandedParentsCount(index) == expandedParentsCount);
 283             }
 284             m_keyboardAnchorIndex = index;
 285             m_keyboardAnchorPos = keyboardAnchorPos(index);
 286         }
 287         break;
 288
 289     case Qt::Key_Right:
 290         if (index < itemCount - 1) {
 291             ++index;
 292             m_keyboardAnchorIndex = index;
 293             m_keyboardAnchorPos = keyboardAnchorPos(index);
 294         }
 295         break;
 296
 297     case Qt::Key_Up:
 298         updateKeyboardAnchor();
 299         index = previousRowIndex(index);
 300         break;
 301
 302     case Qt::Key_Down:
 303         updateKeyboardAnchor();
 304         index = nextRowIndex(index);
 305         break;
 306
 307     case Qt::Key_PageUp:
 308         if (m_view->scrollOrientation() == Qt::Horizontal) {
 309             // The new current index should correspond to the first item in the current column.
 310             int newIndex = qMax(index - 1, 0);
 311             while (newIndex != index && m_view->itemRect(newIndex).topLeft().y() < m_view->itemRect(index).topLeft().y()) {
 312                 index = newIndex;
 313                 newIndex = qMax(index - 1, 0);
 314             }
 315             m_keyboardAnchorIndex = index;
 316             m_keyboardAnchorPos = keyboardAnchorPos(index);
 317         } else {
 318             const qreal currentItemBottom = m_view->itemRect(index).bottomLeft().y();
 319             const qreal height = m_view->geometry().height();
 320
 321             // The new current item should be the first item in the current
 322             // column whose itemRect's top coordinate is larger than targetY.
 323             const qreal targetY = currentItemBottom - height;
 324
 325             updateKeyboardAnchor();
 326             int newIndex = previousRowIndex(index);
 327             do {
 328                 index = newIndex;
 329                 updateKeyboardAnchor();
 330                 newIndex = previousRowIndex(index);
 331             } while (m_view->itemRect(newIndex).topLeft().y() > targetY && newIndex != index);
 332         }
 333         break;
 334
 335     case Qt::Key_PageDown:
 336         if (m_view->scrollOrientation() == Qt::Horizontal) {
 337             // The new current index should correspond to the last item in the current column.
 338             int newIndex = qMin(index + 1, m_model->count() - 1);
 339             while (newIndex != index && m_view->itemRect(newIndex).topLeft().y() > m_view->itemRect(index).topLeft().y()) {
 340                 index = newIndex;
 341                 newIndex = qMin(index + 1, m_model->count() - 1);
 342             }
 343             m_keyboardAnchorIndex = index;
 344             m_keyboardAnchorPos = keyboardAnchorPos(index);
 345         } else {
 346             const qreal currentItemTop = m_view->itemRect(index).topLeft().y();
 347             const qreal height = m_view->geometry().height();
 348
 349             // The new current item should be the last item in the current
 350             // column whose itemRect's bottom coordinate is smaller than targetY.
 351             const qreal targetY = currentItemTop + height;
 352
 353             updateKeyboardAnchor();
 354             int newIndex = nextRowIndex(index);
 355             do {
 356                 index = newIndex;
 357                 updateKeyboardAnchor();
 358                 newIndex = nextRowIndex(index);
 359             } while (m_view->itemRect(newIndex).bottomLeft().y() < targetY && newIndex != index);
 360         }
 361         break;
 362
 363     case Qt::Key_Enter:
 364     case Qt::Key_Return: {
 365         const KItemSet selectedItems = m_selectionManager->selectedItems();
 366         if (selectedItems.count() >= 2) {
 367             emit itemsActivated(selectedItems);
 368         } else if (selectedItems.count() == 1) {
 369             emit itemActivated(selectedItems.first());
 370         } else {
 371             emit itemActivated(index);
 372         }
 373         break;
 374     }
 375
 376     case Qt::Key_Menu: {
 377         // Emit the signal itemContextMenuRequested() in case if at least one
 378         // item is selected. Otherwise the signal viewContextMenuRequested() will be emitted.
 379         const KItemSet selectedItems = m_selectionManager->selectedItems();
 380         int index = -1;
 381         if (selectedItems.count() >= 2) {
 382             const int currentItemIndex = m_selectionManager->currentItem();
 383             index = selectedItems.contains(currentItemIndex)
 384                     ? currentItemIndex : selectedItems.first();
 385         } else if (selectedItems.count() == 1) {
 386             index = selectedItems.first();
 387         }
 388
 389         if (index >= 0) {
 390             const QRectF contextRect = m_view->itemContextRect(index);
 391             const QPointF pos(m_view->scene()->views().first()->mapToGlobal(contextRect.bottomRight().toPoint()));
 392             emit itemContextMenuRequested(index, pos);
 393         } else {
 394             emit viewContextMenuRequested(QCursor::pos());
 395         }
 396         break;
 397     }
 398
 399     case Qt::Key_Escape:
 400         if (m_selectionBehavior != SingleSelection) {
 401             m_selectionManager->clearSelection();
 402         }
 403         m_keyboardManager->cancelSearch();
 404         emit escapePressed();
 405         break;
 406
 407     case Qt::Key_Space:
 408         if (m_selectionBehavior == MultiSelection) {
 409             if (controlPressed) {
 410                 // Toggle the selection state of the current item.
 411                 m_selectionManager->endAnchoredSelection();
 412                 m_selectionManager->setSelected(index, 1, KItemListSelectionManager::Toggle);
 413                 m_selectionManager->beginAnchoredSelection(index);
 414                 break;
 415             } else {
 416                 // Select the current item if it is not selected yet.
 417                 const int current = m_selectionManager->currentItem();
 418                 if (!m_selectionManager->isSelected(current)) {
 419                     m_selectionManager->setSelected(current);
 420                     break;
 421                 }
 422             }
 423         }
 424         Q_FALLTHROUGH();  // fall through to the default case and add the Space to the current search string.
 425     default:
 426         m_keyboardManager->addKeys(event->text());
 427         // Make sure unconsumed events get propagated up the chain. #302329
 428         event->ignore();
 429         return false;
 430     }
 431
 432     if (m_selectionManager->currentItem() != index) {
 433         switch (m_selectionBehavior) {
 434         case NoSelection:
 435             m_selectionManager->setCurrentItem(index);
 436             break;
 437
 438         case SingleSelection:
 439             m_selectionManager->setCurrentItem(index);
 440             m_selectionManager->clearSelection();
 441             m_selectionManager->setSelected(index, 1);
 442             break;
 443
 444         case MultiSelection:
 445             if (controlPressed) {
 446                 m_selectionManager->endAnchoredSelection();
 447             }
 448
 449             m_selectionManager->setCurrentItem(index);
 450
 451             if (!shiftOrControlPressed) {
 452                 m_selectionManager->clearSelection();
 453                 m_selectionManager->setSelected(index, 1);
 454             }
 455
 456             if (!shiftPressed) {
 457                 m_selectionManager->beginAnchoredSelection(index);
 458             }
 459             break;
 460         }
 461
 462         m_view->scrollToItem(index);
 463     }
 464     return true;
 465 }
 466
 467 void KItemListController::slotChangeCurrentItem(const QString& text, bool searchFromNextItem)
 468 {
 469     if (!m_model || m_model->count() == 0) {
 470         return;
 471     }
 472     const int currentIndex = m_selectionManager->currentItem();
 473     int index;
 474     if (searchFromNextItem) {
 475         index = m_model->indexForKeyboardSearch(text, (currentIndex + 1) % m_model->count());
 476     } else {
 477         index = m_model->indexForKeyboardSearch(text, currentIndex);
 478     }
 479     if (index >= 0) {
 480         m_selectionManager->setCurrentItem(index);
 481
 482         if (m_selectionBehavior != NoSelection) {
 483             m_selectionManager->clearSelection();
 484             m_selectionManager->setSelected(index, 1);
 485             m_selectionManager->beginAnchoredSelection(index);
 486         }
 487
 488         m_view->scrollToItem(index);
 489     }
 490 }
 491
 492 void KItemListController::slotAutoActivationTimeout()
 493 {
 494     if (!m_model || !m_view) {
 495         return;
 496     }
 497
 498     const int index = m_autoActivationTimer->property("index").toInt();
 499     if (index < 0 || index >= m_model->count()) {
 500         return;
 501     }
 502
 503     /* m_view->isUnderMouse() fixes a bug in the Folder-View-Panel and in the
 504      * Places-Panel.
 505      *
 506      * Bug: When you drag a file onto a Folder-View-Item or a Places-Item and
 507      * then move away before the auto-activation timeout triggers, than the
 508      * item still becomes activated/expanded.
 509      *
 510      * See Bug 293200 and 305783
 511      */
 512     if (m_model->supportsDropping(index) && m_view->isUnderMouse()) {
 513         if (m_view->supportsItemExpanding() && m_model->isExpandable(index)) {
 514             const bool expanded = m_model->isExpanded(index);
 515             m_model->setExpanded(index, !expanded);
 516         } else if (m_autoActivationBehavior != ExpansionOnly) {
 517             emit itemActivated(index);
 518         }
 519     }
 520 }
 521
 522 bool KItemListController::inputMethodEvent(QInputMethodEvent* event)
 523 {
 524     Q_UNUSED(event);
 525     return false;
 526 }
 527
 528 bool KItemListController::mousePressEvent(QGraphicsSceneMouseEvent* event, const QTransform& transform)
 529 {
 530     if (!m_view) {
 531         return false;
 532     }
 533
 534     m_pressedMousePos = transform.map(event->pos());
 535     m_pressedIndex = m_view->itemAt(m_pressedMousePos);
 536     emit mouseButtonPressed(m_pressedIndex, event->buttons());
 537
 538     if (event->buttons() & (Qt::BackButton | Qt::ForwardButton)) {
 539         // Do not select items when clicking the back/forward buttons, see
 540         // https://bugs.kde.org/show_bug.cgi?id=327412.
 541         return true;
 542     }
 543
 544     if (m_view->isAboveExpansionToggle(m_pressedIndex, m_pressedMousePos)) {
 545         m_selectionManager->endAnchoredSelection();
 546         m_selectionManager->setCurrentItem(m_pressedIndex);
 547         m_selectionManager->beginAnchoredSelection(m_pressedIndex);
 548         return true;
 549     }
 550
 551     m_selectionTogglePressed = m_view->isAboveSelectionToggle(m_pressedIndex, m_pressedMousePos);
 552     if (m_selectionTogglePressed) {
 553         m_selectionManager->setSelected(m_pressedIndex, 1, KItemListSelectionManager::Toggle);
 554         // The previous anchored selection has been finished already in
 555         // KItemListSelectionManager::setSelected(). We can safely change
 556         // the current item and start a new anchored selection now.
 557         m_selectionManager->setCurrentItem(m_pressedIndex);
 558         m_selectionManager->beginAnchoredSelection(m_pressedIndex);
 559         return true;
 560     }
 561
 562     const bool shiftPressed = event->modifiers() & Qt::ShiftModifier;
 563     const bool controlPressed = event->modifiers() & Qt::ControlModifier;
 564
 565     // The previous selection is cleared if either
 566     // 1. The selection mode is SingleSelection, or
 567     // 2. the selection mode is MultiSelection, and *none* of the following conditions are met:
 568     //    a) Shift or Control are pressed.
 569     //    b) The clicked item is selected already. In that case, the user might want to:
 570     //       - start dragging multiple items, or
 571     //       - open the context menu and perform an action for all selected items.
 572     const bool shiftOrControlPressed = shiftPressed || controlPressed;
 573     const bool pressedItemAlreadySelected = m_pressedIndex >= 0 && m_selectionManager->isSelected(m_pressedIndex);
 574     const bool clearSelection = m_selectionBehavior == SingleSelection ||
 575                                 (!shiftOrControlPressed && !pressedItemAlreadySelected);
 576     if (clearSelection) {
 577         m_selectionManager->clearSelection();
 578     } else if (pressedItemAlreadySelected && !shiftOrControlPressed && (event->buttons() & Qt::LeftButton)) {
 579         // The user might want to start dragging multiple items, but if he clicks the item
 580         // in order to trigger it instead, the other selected items must be deselected.
 581         // However, we do not know yet what the user is going to do.
 582         // -> remember that the user pressed an item which had been selected already and
 583         //    clear the selection in mouseReleaseEvent(), unless the items are dragged.
 584         m_clearSelectionIfItemsAreNotDragged = true;
 585
 586         if (m_selectionManager->selectedItems().count() == 1 && m_view->isAboveText(m_pressedIndex, m_pressedMousePos)) {
 587             emit selectedItemTextPressed(m_pressedIndex);
 588         }
 589     }
 590
 591     if (!shiftPressed) {
 592         // Finish the anchored selection before the current index is changed
 593         m_selectionManager->endAnchoredSelection();
 594     }
 595
 596     if (m_pressedIndex >= 0) {
 597         m_selectionManager->setCurrentItem(m_pressedIndex);
 598
 599         switch (m_selectionBehavior) {
 600         case NoSelection:
 601             break;
 602
 603         case SingleSelection:
 604             m_selectionManager->setSelected(m_pressedIndex);
 605             break;
 606
 607         case MultiSelection:
 608             if (controlPressed && !shiftPressed) {
 609                 m_selectionManager->setSelected(m_pressedIndex, 1, KItemListSelectionManager::Toggle);
 610                 m_selectionManager->beginAnchoredSelection(m_pressedIndex);
 611             } else if (!shiftPressed || !m_selectionManager->isAnchoredSelectionActive()) {
 612                 // Select the pressed item and start a new anchored selection
 613                 m_selectionManager->setSelected(m_pressedIndex, 1, KItemListSelectionManager::Select);
 614                 m_selectionManager->beginAnchoredSelection(m_pressedIndex);
 615             }
 616             break;
 617
 618         default:
 619             Q_ASSERT(false);
 620             break;
 621         }
 622
 623         if (event->buttons() & Qt::RightButton) {
 624             emit itemContextMenuRequested(m_pressedIndex, event->screenPos());
 625         }
 626
 627         return true;
 628     }
 629
 630     if (event->buttons() & Qt::RightButton) {
 631         const QRectF headerBounds = m_view->headerBoundaries();
 632         if (headerBounds.contains(event->pos())) {
 633             emit headerContextMenuRequested(event->screenPos());
 634         } else {
 635             emit viewContextMenuRequested(event->screenPos());
 636         }
 637         return true;
 638     }
 639
 640     if (m_selectionBehavior == MultiSelection) {
 641         QPointF startPos = m_pressedMousePos;
 642         if (m_view->scrollOrientation() == Qt::Vertical) {
 643             startPos.ry() += m_view->scrollOffset();
 644             if (m_view->itemSize().width() < 0) {
 645                 // Use a special rubberband for views that have only one column and
 646                 // expand the rubberband to use the whole width of the view.
 647                 startPos.setX(0);
 648             }
 649         } else {
 650             startPos.rx() += m_view->scrollOffset();
 651         }
 652
 653         m_oldSelection = m_selectionManager->selectedItems();
 654         KItemListRubberBand* rubberBand = m_view->rubberBand();
 655         rubberBand->setStartPosition(startPos);
 656         rubberBand->setEndPosition(startPos);
 657         rubberBand->setActive(true);
 658         connect(rubberBand, &KItemListRubberBand::endPositionChanged, this, &KItemListController::slotRubberBandChanged);
 659         m_view->setAutoScroll(true);
 660     }
 661
 662     return false;
 663 }
 664
 665 bool KItemListController::mouseMoveEvent(QGraphicsSceneMouseEvent* event, const QTransform& transform)
 666 {
 667     if (!m_view) {
 668         return false;
 669     }
 670
 671     if (m_pressedIndex >= 0) {
 672         // Check whether a dragging should be started
 673         if (event->buttons() & Qt::LeftButton) {
 674             const QPointF pos = transform.map(event->pos());
 675             if ((pos - m_pressedMousePos).manhattanLength() >= QApplication::startDragDistance()) {
 676                 if (!m_selectionManager->isSelected(m_pressedIndex)) {
 677                     // Always assure that the dragged item gets selected. Usually this is already
 678                     // done on the mouse-press event, but when using the selection-toggle on a
 679                     // selected item the dragged item is not selected yet.
 680                     m_selectionManager->setSelected(m_pressedIndex, 1, KItemListSelectionManager::Toggle);
 681                 } else {
 682                     // A selected item has been clicked to drag all selected items
 683                     // -> the selection should not be cleared when the mouse button is released.
 684                     m_clearSelectionIfItemsAreNotDragged = false;
 685                 }
 686
 687                 startDragging();
 688             }
 689         }
 690     } else {
 691         KItemListRubberBand* rubberBand = m_view->rubberBand();
 692         if (rubberBand->isActive()) {
 693             QPointF endPos = transform.map(event->pos());
 694
 695             // Update the current item.
 696             const int newCurrent = m_view->itemAt(endPos);
 697             if (newCurrent >= 0) {
 698                 // It's expected that the new current index is also the new anchor (bug 163451).
 699                 m_selectionManager->endAnchoredSelection();
 700                 m_selectionManager->setCurrentItem(newCurrent);
 701                 m_selectionManager->beginAnchoredSelection(newCurrent);
 702             }
 703
 704             if (m_view->scrollOrientation() == Qt::Vertical) {
 705                 endPos.ry() += m_view->scrollOffset();
 706                 if (m_view->itemSize().width() < 0) {
 707                     // Use a special rubberband for views that have only one column and
 708                     // expand the rubberband to use the whole width of the view.
 709                     endPos.setX(m_view->size().width());
 710                 }
 711             } else {
 712                 endPos.rx() += m_view->scrollOffset();
 713             }
 714             rubberBand->setEndPosition(endPos);
 715         }
 716     }
 717
 718     return false;
 719 }
 720
 721 bool KItemListController::mouseReleaseEvent(QGraphicsSceneMouseEvent* event, const QTransform& transform)
 722 {
 723     if (!m_view) {
 724         return false;
 725     }
 726
 727     emit mouseButtonReleased(m_pressedIndex, event->buttons());
 728
 729     const bool isAboveSelectionToggle = m_view->isAboveSelectionToggle(m_pressedIndex, m_pressedMousePos);
 730     if (isAboveSelectionToggle) {
 731         m_selectionTogglePressed = false;
 732         return true;
 733     }
 734
 735     if (!isAboveSelectionToggle && m_selectionTogglePressed) {
 736         m_selectionManager->setSelected(m_pressedIndex, 1, KItemListSelectionManager::Toggle);
 737         m_selectionTogglePressed = false;
 738         return true;
 739     }
 740
 741     const bool shiftOrControlPressed = event->modifiers() & Qt::ShiftModifier ||
 742                                        event->modifiers() & Qt::ControlModifier;
 743
 744     KItemListRubberBand* rubberBand = m_view->rubberBand();
 745     if (rubberBand->isActive()) {
 746         disconnect(rubberBand, &KItemListRubberBand::endPositionChanged, this, &KItemListController::slotRubberBandChanged);
 747         rubberBand->setActive(false);
 748         m_oldSelection.clear();
 749         m_view->setAutoScroll(false);
 750     }
 751
 752     const QPointF pos = transform.map(event->pos());
 753     const int index = m_view->itemAt(pos);
 754
 755     if (index >= 0 && index == m_pressedIndex) {
 756         // The release event is done above the same item as the press event
 757
 758         if (m_clearSelectionIfItemsAreNotDragged) {
 759             // A selected item has been clicked, but no drag operation has been started
 760             // -> clear the rest of the selection.
 761             m_selectionManager->clearSelection();
 762             m_selectionManager->setSelected(m_pressedIndex, 1, KItemListSelectionManager::Select);
 763             m_selectionManager->beginAnchoredSelection(m_pressedIndex);
 764         }
 765
 766         if (event->button() & Qt::LeftButton) {
 767             bool emitItemActivated = true;
 768             if (m_view->isAboveExpansionToggle(index, pos)) {
 769                 const bool expanded = m_model->isExpanded(index);
 770                 m_model->setExpanded(index, !expanded);
 771
 772                 emit itemExpansionToggleClicked(index);
 773                 emitItemActivated = false;
 774             } else if (shiftOrControlPressed) {
 775                 // The mouse click should only update the selection, not trigger the item
 776                 emitItemActivated = false;
 777             } else if (!(m_view->style()->styleHint(QStyle::SH_ItemView_ActivateItemOnSingleClick) || m_singleClickActivationEnforced)) {
 778                 emitItemActivated = false;
 779             }
 780             if (emitItemActivated) {
 781                 emit itemActivated(index);
 782             }
 783         } else if (event->button() & Qt::MidButton) {
 784             emit itemMiddleClicked(index);
 785         }
 786     }
 787
 788     m_pressedMousePos = QPointF();
 789     m_pressedIndex = -1;
 790     m_clearSelectionIfItemsAreNotDragged = false;
 791     return false;
 792 }
 793
 794 bool KItemListController::mouseDoubleClickEvent(QGraphicsSceneMouseEvent* event, const QTransform& transform)
 795 {
 796     const QPointF pos = transform.map(event->pos());
 797     const int index = m_view->itemAt(pos);
 798
 799     // Expand item if desired - See Bug 295573
 800     if (m_mouseDoubleClickAction != ActivateItemOnly) {
 801         if (m_view && m_model && m_view->supportsItemExpanding() && m_model->isExpandable(index)) {
 802             const bool expanded = m_model->isExpanded(index);
 803             m_model->setExpanded(index, !expanded);
 804         }
 805     }
 806
 807     if (event->button() & Qt::RightButton) {
 808         m_selectionManager->clearSelection();
 809         if (index >= 0) {
 810             m_selectionManager->setSelected(index);
 811             emit itemContextMenuRequested(index, event->screenPos());
 812         } else {
 813             const QRectF headerBounds = m_view->headerBoundaries();
 814             if (headerBounds.contains(event->pos())) {
 815                 emit headerContextMenuRequested(event->screenPos());
 816             } else {
 817                 emit viewContextMenuRequested(event->screenPos());
 818             }
 819         }
 820         return true;
 821     }
 822
 823     bool emitItemActivated = !(m_view->style()->styleHint(QStyle::SH_ItemView_ActivateItemOnSingleClick) || m_singleClickActivationEnforced) &&
 824                              (event->button() & Qt::LeftButton) &&
 825                              index >= 0 && index < m_model->count();
 826     if (emitItemActivated) {
 827         emit itemActivated(index);
 828     }
 829     return false;
 830 }
 831
 832 bool KItemListController::dragEnterEvent(QGraphicsSceneDragDropEvent* event, const QTransform& transform)
 833 {
 834     Q_UNUSED(event);
 835     Q_UNUSED(transform);
 836
 837     DragAndDropHelper::clearUrlListMatchesUrlCache();
 838
 839     return false;
 840 }
 841
 842 bool KItemListController::dragLeaveEvent(QGraphicsSceneDragDropEvent* event, const QTransform& transform)
 843 {
 844     Q_UNUSED(event);
 845     Q_UNUSED(transform);
 846
 847     m_autoActivationTimer->stop();
 848     m_view->setAutoScroll(false);
 849     m_view->hideDropIndicator();
 850
 851     KItemListWidget* widget = hoveredWidget();
 852     if (widget) {
 853         widget->setHovered(false);
 854         emit itemUnhovered(widget->index());
 855     }
 856     return false;
 857 }
 858
 859 bool KItemListController::dragMoveEvent(QGraphicsSceneDragDropEvent* event, const QTransform& transform)
 860 {
 861     if (!m_model || !m_view) {
 862         return false;
 863     }
 864
 865
 866     QUrl hoveredDir = m_model->directory();
 867     KItemListWidget* oldHoveredWidget = hoveredWidget();
 868
 869     const QPointF pos = transform.map(event->pos());
 870     KItemListWidget* newHoveredWidget = widgetForPos(pos);
 871
 872     if (oldHoveredWidget != newHoveredWidget) {
 873         m_autoActivationTimer->stop();
 874
 875         if (oldHoveredWidget) {
 876             oldHoveredWidget->setHovered(false);
 877             emit itemUnhovered(oldHoveredWidget->index());
 878         }
 879     }
 880
 881     if (newHoveredWidget) {
 882         bool droppingBetweenItems = false;
 883         if (m_model->sortRole().isEmpty()) {
 884             // The model supports inserting items between other items.
 885             droppingBetweenItems = (m_view->showDropIndicator(pos) >= 0);
 886         }
 887
 888         const int index = newHoveredWidget->index();
 889
 890         if (m_model->isDir(index)) {
 891             hoveredDir = m_model->url(index);
 892         }
 893
 894         if (!droppingBetweenItems) {
 895             if (m_model->supportsDropping(index)) {
 896                 // Something has been dragged on an item.
 897                 m_view->hideDropIndicator();
 898                 if (!newHoveredWidget->isHovered()) {
 899                     newHoveredWidget->setHovered(true);
 900                     emit itemHovered(index);
 901                 }
 902
 903                 if (!m_autoActivationTimer->isActive() && m_autoActivationTimer->interval() >= 0) {
 904                     m_autoActivationTimer->setProperty("index", index);
 905                     m_autoActivationTimer->start();
 906                 }
 907             }
 908         } else {
 909             m_autoActivationTimer->stop();
 910             if (newHoveredWidget && newHoveredWidget->isHovered()) {
 911                 newHoveredWidget->setHovered(false);
 912                 emit itemUnhovered(index);
 913             }
 914         }
 915     } else {
 916         m_view->hideDropIndicator();
 917     }
 918
 919     event->setAccepted(!DragAndDropHelper::urlListMatchesUrl(event->mimeData()->urls(), hoveredDir));
 920
 921     return false;
 922 }
 923
 924 bool KItemListController::dropEvent(QGraphicsSceneDragDropEvent* event, const QTransform& transform)
 925 {
 926     if (!m_view) {
 927         return false;
 928     }
 929
 930     m_autoActivationTimer->stop();
 931     m_view->setAutoScroll(false);
 932
 933     const QPointF pos = transform.map(event->pos());
 934
 935     int dropAboveIndex = -1;
 936     if (m_model->sortRole().isEmpty()) {
 937         // The model supports inserting of items between other items.
 938         dropAboveIndex = m_view->showDropIndicator(pos);
 939     }
 940
 941     if (dropAboveIndex >= 0) {
 942         // Something has been dropped between two items.
 943         m_view->hideDropIndicator();
 944         emit aboveItemDropEvent(dropAboveIndex, event);
 945     } else if (!event->mimeData()->hasFormat(m_model->blacklistItemDropEventMimeType())) {
 946         // Something has been dropped on an item or on an empty part of the view.
 947         emit itemDropEvent(m_view->itemAt(pos), event);
 948     }
 949
 950     QAccessibleEvent accessibilityEvent(view(), QAccessible::DragDropEnd);
 951     QAccessible::updateAccessibility(&accessibilityEvent);
 952
 953     return true;
 954 }
 955
 956 bool KItemListController::hoverEnterEvent(QGraphicsSceneHoverEvent* event, const QTransform& transform)
 957 {
 958     Q_UNUSED(event);
 959     Q_UNUSED(transform);
 960     return false;
 961 }
 962
 963 bool KItemListController::hoverMoveEvent(QGraphicsSceneHoverEvent* event, const QTransform& transform)
 964 {
 965     Q_UNUSED(transform);
 966     if (!m_model || !m_view) {
 967         return false;
 968     }
 969
 970     KItemListWidget* oldHoveredWidget = hoveredWidget();
 971     const QPointF pos = transform.map(event->pos());
 972     KItemListWidget* newHoveredWidget = widgetForPos(pos);
 973
 974     if (oldHoveredWidget != newHoveredWidget) {
 975         if (oldHoveredWidget) {
 976             oldHoveredWidget->setHovered(false);
 977             emit itemUnhovered(oldHoveredWidget->index());
 978         }
 979
 980         if (newHoveredWidget) {
 981             newHoveredWidget->setHovered(true);
 982             const QPointF mappedPos = newHoveredWidget->mapFromItem(m_view, pos);
 983             newHoveredWidget->setHoverPosition(mappedPos);
 984             emit itemHovered(newHoveredWidget->index());
 985         }
 986     } else if (oldHoveredWidget) {
 987         const QPointF mappedPos = oldHoveredWidget->mapFromItem(m_view, pos);
 988         oldHoveredWidget->setHoverPosition(mappedPos);
 989     }
 990
 991     return false;
 992 }
 993
 994 bool KItemListController::hoverLeaveEvent(QGraphicsSceneHoverEvent* event, const QTransform& transform)
 995 {
 996     Q_UNUSED(event);
 997     Q_UNUSED(transform);
 998
 999     if (!m_model || !m_view) {
1000         return false;
1001     }
1002
1003     foreach (KItemListWidget* widget, m_view->visibleItemListWidgets()) {
1004         if (widget->isHovered()) {
1005             widget->setHovered(false);
1006             emit itemUnhovered(widget->index());
1007         }
1008     }
1009     return false;
1010 }
1011
1012 bool KItemListController::wheelEvent(QGraphicsSceneWheelEvent* event, const QTransform& transform)
1013 {
1014     Q_UNUSED(event);
1015     Q_UNUSED(transform);
1016     return false;
1017 }
1018
1019 bool KItemListController::resizeEvent(QGraphicsSceneResizeEvent* event, const QTransform& transform)
1020 {
1021     Q_UNUSED(event);
1022     Q_UNUSED(transform);
1023     return false;
1024 }
1025
1026 bool KItemListController::processEvent(QEvent* event, const QTransform& transform)
1027 {
1028     if (!event) {
1029         return false;
1030     }
1031
1032     switch (event->type()) {
1033     case QEvent::KeyPress:
1034         return keyPressEvent(static_cast<QKeyEvent*>(event));
1035     case QEvent::InputMethod:
1036         return inputMethodEvent(static_cast<QInputMethodEvent*>(event));
1037     case QEvent::GraphicsSceneMousePress:
1038         return mousePressEvent(static_cast<QGraphicsSceneMouseEvent*>(event), QTransform());
1039     case QEvent::GraphicsSceneMouseMove:
1040         return mouseMoveEvent(static_cast<QGraphicsSceneMouseEvent*>(event), QTransform());
1041     case QEvent::GraphicsSceneMouseRelease:
1042         return mouseReleaseEvent(static_cast<QGraphicsSceneMouseEvent*>(event), QTransform());
1043     case QEvent::GraphicsSceneMouseDoubleClick:
1044         return mouseDoubleClickEvent(static_cast<QGraphicsSceneMouseEvent*>(event), QTransform());
1045     case QEvent::GraphicsSceneWheel:
1046          return wheelEvent(static_cast<QGraphicsSceneWheelEvent*>(event), QTransform());
1047     case QEvent::GraphicsSceneDragEnter:
1048         return dragEnterEvent(static_cast<QGraphicsSceneDragDropEvent*>(event), QTransform());
1049     case QEvent::GraphicsSceneDragLeave:
1050         return dragLeaveEvent(static_cast<QGraphicsSceneDragDropEvent*>(event), QTransform());
1051     case QEvent::GraphicsSceneDragMove:
1052         return dragMoveEvent(static_cast<QGraphicsSceneDragDropEvent*>(event), QTransform());
1053     case QEvent::GraphicsSceneDrop:
1054         return dropEvent(static_cast<QGraphicsSceneDragDropEvent*>(event), QTransform());
1055     case QEvent::GraphicsSceneHoverEnter:
1056         return hoverEnterEvent(static_cast<QGraphicsSceneHoverEvent*>(event), QTransform());
1057     case QEvent::GraphicsSceneHoverMove:
1058         return hoverMoveEvent(static_cast<QGraphicsSceneHoverEvent*>(event), QTransform());
1059     case QEvent::GraphicsSceneHoverLeave:
1060         return hoverLeaveEvent(static_cast<QGraphicsSceneHoverEvent*>(event), QTransform());
1061     case QEvent::GraphicsSceneResize:
1062         return resizeEvent(static_cast<QGraphicsSceneResizeEvent*>(event), transform);
1063     default:
1064         break;
1065     }
1066
1067     return false;
1068 }
1069
1070 void KItemListController::slotViewScrollOffsetChanged(qreal current, qreal previous)
1071 {
1072     if (!m_view) {
1073         return;
1074     }
1075
1076     KItemListRubberBand* rubberBand = m_view->rubberBand();
1077     if (rubberBand->isActive()) {
1078         const qreal diff = current - previous;
1079         // TODO: Ideally just QCursor::pos() should be used as
1080         // new end-position but it seems there is no easy way
1081         // to have something like QWidget::mapFromGlobal() for QGraphicsWidget
1082         // (... or I just missed an easy way to do the mapping)
1083         QPointF endPos = rubberBand->endPosition();
1084         if (m_view->scrollOrientation() == Qt::Vertical) {
1085             endPos.ry() += diff;
1086         } else {
1087             endPos.rx() += diff;
1088         }
1089
1090         rubberBand->setEndPosition(endPos);
1091     }
1092 }
1093
1094 void KItemListController::slotRubberBandChanged()
1095 {
1096     if (!m_view || !m_model || m_model->count() <= 0) {
1097         return;
1098     }
1099
1100     const KItemListRubberBand* rubberBand = m_view->rubberBand();
1101     const QPointF startPos = rubberBand->startPosition();
1102     const QPointF endPos = rubberBand->endPosition();
1103     QRectF rubberBandRect = QRectF(startPos, endPos).normalized();
1104
1105     const bool scrollVertical = (m_view->scrollOrientation() == Qt::Vertical);
1106     if (scrollVertical) {
1107         rubberBandRect.translate(0, -m_view->scrollOffset());
1108     } else {
1109         rubberBandRect.translate(-m_view->scrollOffset(), 0);
1110     }
1111
1112     if (!m_oldSelection.isEmpty()) {
1113         // Clear the old selection that was available before the rubberband has
1114         // been activated in case if no Shift- or Control-key are pressed
1115         const bool shiftOrControlPressed = QApplication::keyboardModifiers() & Qt::ShiftModifier ||
1116                                            QApplication::keyboardModifiers() & Qt::ControlModifier;
1117         if (!shiftOrControlPressed) {
1118             m_oldSelection.clear();
1119         }
1120     }
1121
1122     KItemSet selectedItems;
1123
1124     // Select all visible items that intersect with the rubberband
1125     foreach (const KItemListWidget* widget, m_view->visibleItemListWidgets()) {
1126         const int index = widget->index();
1127
1128         const QRectF widgetRect = m_view->itemRect(index);
1129         if (widgetRect.intersects(rubberBandRect)) {
1130             const QRectF iconRect = widget->iconRect().translated(widgetRect.topLeft());
1131             const QRectF textRect = widget->textRect().translated(widgetRect.topLeft());
1132             if (iconRect.intersects(rubberBandRect) || textRect.intersects(rubberBandRect)) {
1133                 selectedItems.insert(index);
1134             }
1135         }
1136     }
1137
1138     // Select all invisible items that intersect with the rubberband. Instead of
1139     // iterating all items only the area which might be touched by the rubberband
1140     // will be checked.
1141     const bool increaseIndex = scrollVertical ?
1142                                startPos.y() > endPos.y(): startPos.x() > endPos.x();
1143
1144     int index = increaseIndex ? m_view->lastVisibleIndex() + 1 : m_view->firstVisibleIndex() - 1;
1145     bool selectionFinished = false;
1146     do {
1147         const QRectF widgetRect = m_view->itemRect(index);
1148         if (widgetRect.intersects(rubberBandRect)) {
1149             selectedItems.insert(index);
1150         }
1151
1152         if (increaseIndex) {
1153             ++index;
1154             selectionFinished = (index >= m_model->count()) ||
1155                                 ( scrollVertical && widgetRect.top()  > rubberBandRect.bottom()) ||
1156                                 (!scrollVertical && widgetRect.left() > rubberBandRect.right());
1157         } else {
1158             --index;
1159             selectionFinished = (index < 0) ||
1160                                 ( scrollVertical && widgetRect.bottom() < rubberBandRect.top()) ||
1161                                 (!scrollVertical && widgetRect.right()  < rubberBandRect.left());
1162         }
1163     } while (!selectionFinished);
1164
1165     if (QApplication::keyboardModifiers() & Qt::ControlModifier) {
1166         // If Control is pressed, the selection state of all items in the rubberband is toggled.
1167         // Therefore, the new selection contains:
1168         // 1. All previously selected items which are not inside the rubberband, and
1169         // 2. all items inside the rubberband which have not been selected previously.
1170         m_selectionManager->setSelectedItems(m_oldSelection ^ selectedItems);
1171     }
1172     else {
1173         m_selectionManager->setSelectedItems(selectedItems + m_oldSelection);
1174     }
1175 }
1176
1177 void KItemListController::startDragging()
1178 {
1179     if (!m_view || !m_model) {
1180         return;
1181     }
1182
1183     const KItemSet selectedItems = m_selectionManager->selectedItems();
1184     if (selectedItems.isEmpty()) {
1185         return;
1186     }
1187
1188     QMimeData* data = m_model->createMimeData(selectedItems);
1189     if (!data) {
1190         return;
1191     }
1192
1193     // The created drag object will be owned and deleted
1194     // by QApplication::activeWindow().
1195     QDrag* drag = new QDrag(QApplication::activeWindow());
1196     drag->setMimeData(data);
1197
1198     const QPixmap pixmap = m_view->createDragPixmap(selectedItems);
1199     drag->setPixmap(pixmap);
1200
1201     const QPoint hotSpot((pixmap.width() / pixmap.devicePixelRatio()) / 2, 0);
1202     drag->setHotSpot(hotSpot);
1203
1204     drag->exec(Qt::MoveAction | Qt::CopyAction | Qt::LinkAction, Qt::CopyAction);
1205
1206     QAccessibleEvent accessibilityEvent(view(), QAccessible::DragDropStart);
1207     QAccessible::updateAccessibility(&accessibilityEvent);
1208 }
1209
1210 KItemListWidget* KItemListController::hoveredWidget() const
1211 {
1212     Q_ASSERT(m_view);
1213
1214     foreach (KItemListWidget* widget, m_view->visibleItemListWidgets()) {
1215         if (widget->isHovered()) {
1216             return widget;
1217         }
1218     }
1219
1220     return nullptr;
1221 }
1222
1223 KItemListWidget* KItemListController::widgetForPos(const QPointF& pos) const
1224 {
1225     Q_ASSERT(m_view);
1226
1227     foreach (KItemListWidget* widget, m_view->visibleItemListWidgets()) {
1228         const QPointF mappedPos = widget->mapFromItem(m_view, pos);
1229
1230         const bool hovered = widget->contains(mappedPos) &&
1231                              !widget->expansionToggleRect().contains(mappedPos);
1232         if (hovered) {
1233             return widget;
1234         }
1235     }
1236
1237     return nullptr;
1238 }
1239
1240 void KItemListController::updateKeyboardAnchor()
1241 {
1242     const bool validAnchor = m_keyboardAnchorIndex >= 0 &&
1243                              m_keyboardAnchorIndex < m_model->count() &&
1244                              keyboardAnchorPos(m_keyboardAnchorIndex) == m_keyboardAnchorPos;
1245     if (!validAnchor) {
1246         const int index = m_selectionManager->currentItem();
1247         m_keyboardAnchorIndex = index;
1248         m_keyboardAnchorPos = keyboardAnchorPos(index);
1249     }
1250 }
1251
1252 int KItemListController::nextRowIndex(int index) const
1253 {
1254     if (m_keyboardAnchorIndex < 0) {
1255         return index;
1256     }
1257
1258     const int maxIndex = m_model->count() - 1;
1259     if (index == maxIndex) {
1260         return index;
1261     }
1262
1263     // Calculate the index of the last column inside the row of the current index
1264     int lastColumnIndex = index;
1265     while (keyboardAnchorPos(lastColumnIndex + 1) > keyboardAnchorPos(lastColumnIndex)) {
1266         ++lastColumnIndex;
1267         if (lastColumnIndex >= maxIndex) {
1268             return index;
1269         }
1270     }
1271
1272     // Based on the last column index go to the next row and calculate the nearest index
1273     // that is below the current index
1274     int nextRowIndex = lastColumnIndex + 1;
1275     int searchIndex = nextRowIndex;
1276     qreal minDiff = qAbs(m_keyboardAnchorPos - keyboardAnchorPos(nextRowIndex));
1277     while (searchIndex < maxIndex && keyboardAnchorPos(searchIndex + 1) > keyboardAnchorPos(searchIndex)) {
1278         ++searchIndex;
1279         const qreal searchDiff = qAbs(m_keyboardAnchorPos - keyboardAnchorPos(searchIndex));
1280         if (searchDiff < minDiff) {
1281             minDiff = searchDiff;
1282             nextRowIndex = searchIndex;
1283         }
1284     }
1285
1286     return nextRowIndex;
1287 }
1288
1289 int KItemListController::previousRowIndex(int index) const
1290 {
1291     if (m_keyboardAnchorIndex < 0 || index == 0) {
1292         return index;
1293     }
1294
1295     // Calculate the index of the first column inside the row of the current index
1296     int firstColumnIndex = index;
1297     while (keyboardAnchorPos(firstColumnIndex - 1) < keyboardAnchorPos(firstColumnIndex)) {
1298         --firstColumnIndex;
1299         if (firstColumnIndex <= 0) {
1300             return index;
1301         }
1302     }
1303
1304     // Based on the first column index go to the previous row and calculate the nearest index
1305     // that is above the current index
1306     int previousRowIndex = firstColumnIndex - 1;
1307     int searchIndex = previousRowIndex;
1308     qreal minDiff = qAbs(m_keyboardAnchorPos - keyboardAnchorPos(previousRowIndex));
1309     while (searchIndex > 0 && keyboardAnchorPos(searchIndex - 1) < keyboardAnchorPos(searchIndex)) {
1310         --searchIndex;
1311         const qreal searchDiff = qAbs(m_keyboardAnchorPos - keyboardAnchorPos(searchIndex));
1312         if (searchDiff < minDiff) {
1313             minDiff = searchDiff;
1314             previousRowIndex = searchIndex;
1315         }
1316     }
1317
1318     return previousRowIndex;
1319 }
1320
1321 qreal KItemListController::keyboardAnchorPos(int index) const
1322 {
1323     const QRectF itemRect = m_view->itemRect(index);
1324     if (!itemRect.isEmpty()) {
1325         return (m_view->scrollOrientation() == Qt::Vertical) ? itemRect.x() : itemRect.y();
1326     }
1327
1328     return 0;
1329 }
1330
1331 void KItemListController::updateExtendedSelectionRegion()
1332 {
1333     if (m_view) {
1334         const bool extend = (m_selectionBehavior != MultiSelection);
1335         KItemListStyleOption option = m_view->styleOption();
1336         if (option.extendedSelectionRegion != extend) {
1337             option.extendedSelectionRegion = extend;
1338             m_view->setStyleOption(option);
1339         }
1340     }
1341 }
1342