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
  27 #include "kitemlistview.h"
  28 #include "kitemlistselectionmanager.h"
  29
  30 #include "private/kitemlistrubberband.h"
  31 #include "private/kitemlistkeyboardsearchmanager.h"
  32
  33 #include <QApplication>
  34 #include <QDrag>
  35 #include <QEvent>
  36 #include <QGraphicsScene>
  37 #include <QGraphicsSceneEvent>
  38 #include <QGraphicsView>
  39 #include <QMimeData>
  40 #include <QTimer>
  41 #include <QAccessible>
  42 #include <views/draganddrophelper.h>
  43
  44 KItemListController::KItemListController(KItemModelBase* model, KItemListView* view, QObject* parent) :
  45     QObject(parent),
  46     m_singleClickActivationEnforced(false),
  47     m_selectionTogglePressed(false),
  48     m_clearSelectionIfItemsAreNotDragged(false),
  49     m_selectionBehavior(NoSelection),
  50     m_autoActivationBehavior(ActivationAndExpansion),
  51     m_mouseDoubleClickAction(ActivateItemOnly),
  52     m_model(nullptr),
  53     m_view(nullptr),
  54     m_selectionManager(new KItemListSelectionManager(this)),
  55     m_keyboardManager(new KItemListKeyboardSearchManager(this)),
  56     m_pressedIndex(-1),
  57     m_pressedMousePos(),
  58     m_autoActivationTimer(nullptr),
  59     m_oldSelection(),
  60     m_keyboardAnchorIndex(-1),
  61     m_keyboardAnchorPos(0)
  62 {
  63     connect(m_keyboardManager, &KItemListKeyboardSearchManager::changeCurrentItem,
  64             this, &KItemListController::slotChangeCurrentItem);
  65     connect(m_selectionManager, &KItemListSelectionManager::currentChanged,
  66             m_keyboardManager, &KItemListKeyboardSearchManager::slotCurrentChanged);
  67
  68     m_autoActivationTimer = new QTimer(this);
  69     m_autoActivationTimer->setSingleShot(true);
  70     m_autoActivationTimer->setInterval(-1);
  71     connect(m_autoActivationTimer, &QTimer::timeout, this, &KItemListController::slotAutoActivationTimeout);
  72
  73     setModel(model);
  74     setView(view);
  75 }
  76
  77 KItemListController::~KItemListController()
  78 {
  79     setView(nullptr);
  80     Q_ASSERT(!m_view);
  81
  82     setModel(nullptr);
  83     Q_ASSERT(!m_model);
  84 }
  85
  86 void KItemListController::setModel(KItemModelBase* model)
  87 {
  88     if (m_model == model) {
  89         return;
  90     }
  91
  92     KItemModelBase* oldModel = m_model;
  93     if (oldModel) {
  94         oldModel->deleteLater();
  95     }
  96
  97     m_model = model;
  98     if (m_model) {
  99         m_model->setParent(this);
 100     }
 101
 102     if (m_view) {
 103         m_view->setModel(m_model);
 104     }
 105
 106     m_selectionManager->setModel(m_model);
 107
 108     emit modelChanged(m_model, oldModel);
 109 }
 110
 111 KItemModelBase* KItemListController::model() const
 112 {
 113     return m_model;
 114 }
 115
 116 KItemListSelectionManager* KItemListController::selectionManager() const
 117 {
 118     return m_selectionManager;
 119 }
 120
 121 void KItemListController::setView(KItemListView* view)
 122 {
 123     if (m_view == view) {
 124         return;
 125     }
 126
 127     KItemListView* oldView = m_view;
 128     if (oldView) {
 129         disconnect(oldView, &KItemListView::scrollOffsetChanged, this, &KItemListController::slotViewScrollOffsetChanged);
 130         oldView->deleteLater();
 131     }
 132
 133     m_view = view;
 134
 135     if (m_view) {
 136         m_view->setParent(this);
 137         m_view->setController(this);
 138         m_view->setModel(m_model);
 139         connect(m_view, &KItemListView::scrollOffsetChanged, this, &KItemListController::slotViewScrollOffsetChanged);
 140         updateExtendedSelectionRegion();
 141     }
 142
 143     emit viewChanged(m_view, oldView);
 144 }
 145
 146 KItemListView* KItemListController::view() const
 147 {
 148     return m_view;
 149 }
 150
 151 void KItemListController::setSelectionBehavior(SelectionBehavior behavior)
 152 {
 153     m_selectionBehavior = behavior;
 154     updateExtendedSelectionRegion();
 155 }
 156
 157 KItemListController::SelectionBehavior KItemListController::selectionBehavior() const
 158 {
 159     return m_selectionBehavior;
 160 }
 161
 162 void KItemListController::setAutoActivationBehavior(AutoActivationBehavior behavior)
 163 {
 164     m_autoActivationBehavior = behavior;
 165 }
 166
 167 KItemListController::AutoActivationBehavior KItemListController::autoActivationBehavior() const
 168 {
 169     return m_autoActivationBehavior;
 170 }
 171
 172 void KItemListController::setMouseDoubleClickAction(MouseDoubleClickAction action)
 173 {
 174     m_mouseDoubleClickAction = action;
 175 }
 176
 177 KItemListController::MouseDoubleClickAction KItemListController::mouseDoubleClickAction() const
 178 {
 179     return m_mouseDoubleClickAction;
 180 }
 181
 182 int KItemListController::indexCloseToMousePressedPosition() const
 183 {
 184     QHashIterator<KItemListWidget*, KItemListGroupHeader*> it(m_view->m_visibleGroups);
 185     while (it.hasNext()) {
 186         it.next();
 187         KItemListGroupHeader *groupHeader = it.value();
 188         const QPointF mappedToGroup = groupHeader->mapFromItem(nullptr, m_pressedMousePos);
 189         if (groupHeader->contains(mappedToGroup)) {
 190             return it.key()->index();
 191         }
 192     }
 193     return -1;
 194 }
 195
 196 void KItemListController::setAutoActivationDelay(int delay)
 197 {
 198     m_autoActivationTimer->setInterval(delay);
 199 }
 200
 201 int KItemListController::autoActivationDelay() const
 202 {
 203     return m_autoActivationTimer->interval();
 204 }
 205
 206 void KItemListController::setSingleClickActivationEnforced(bool singleClick)
 207 {
 208     m_singleClickActivationEnforced = singleClick;
 209 }
 210
 211 bool KItemListController::singleClickActivationEnforced() const
 212 {
 213     return m_singleClickActivationEnforced;
 214 }
 215
 216 bool KItemListController::showEvent(QShowEvent* event)
 217 {
 218     Q_UNUSED(event);
 219     return false;
 220 }
 221
 222 bool KItemListController::hideEvent(QHideEvent* event)
 223 {
 224     Q_UNUSED(event);
 225     return false;
 226 }
 227
 228 bool KItemListController::keyPressEvent(QKeyEvent* event)
 229 {
 230     int index = m_selectionManager->currentItem();
 231     int key = event->key();
 232
 233     // Handle the expanding/collapsing of items
 234     if (m_view->supportsItemExpanding() && m_model->isExpandable(index)) {
 235         if (key == Qt::Key_Right) {
 236             if (m_model->setExpanded(index, true)) {
 237                 return true;
 238             }
 239         } else if (key == Qt::Key_Left) {
 240             if (m_model->setExpanded(index, false)) {
 241                 return true;
 242             }
 243         }
 244     }
 245
 246     const bool shiftPressed = event->modifiers() & Qt::ShiftModifier;
 247     const bool controlPressed = event->modifiers() & Qt::ControlModifier;
 248     const bool shiftOrControlPressed = shiftPressed || controlPressed;
 249
 250     const int itemCount = m_model->count();
 251
 252     // For horizontal scroll orientation, transform
 253     // the arrow keys to simplify the event handling.
 254     if (m_view->scrollOrientation() == Qt::Horizontal) {
 255         switch (key) {
 256         case Qt::Key_Up:    key = Qt::Key_Left; break;
 257         case Qt::Key_Down:  key = Qt::Key_Right; break;
 258         case Qt::Key_Left:  key = Qt::Key_Up; break;
 259         case Qt::Key_Right: key = Qt::Key_Down; break;
 260         default:            break;
 261         }
 262     }
 263
 264     const bool selectSingleItem = m_selectionBehavior != NoSelection &&
 265                                   itemCount == 1 &&
 266                                   (key == Qt::Key_Home || key == Qt::Key_End  ||
 267                                    key == Qt::Key_Up   || key == Qt::Key_Down ||
 268                                    key == Qt::Key_Left || key == Qt::Key_Right);
 269     if (selectSingleItem) {
 270         const int current = m_selectionManager->currentItem();
 271         m_selectionManager->setSelected(current);
 272         return true;
 273     }
 274
 275     switch (key) {
 276     case Qt::Key_Home:
 277         index = 0;
 278         m_keyboardAnchorIndex = index;
 279         m_keyboardAnchorPos = keyboardAnchorPos(index);
 280         break;
 281
 282     case Qt::Key_End:
 283         index = itemCount - 1;
 284         m_keyboardAnchorIndex = index;
 285         m_keyboardAnchorPos = keyboardAnchorPos(index);
 286         break;
 287
 288     case Qt::Key_Left:
 289         if (index > 0) {
 290             const int expandedParentsCount = m_model->expandedParentsCount(index);
 291             if (expandedParentsCount == 0) {
 292                 --index;
 293             } else {
 294                 // Go to the parent of the current item.
 295                 do {
 296                     --index;
 297                 } while (index > 0 && m_model->expandedParentsCount(index) == expandedParentsCount);
 298             }
 299             m_keyboardAnchorIndex = index;
 300             m_keyboardAnchorPos = keyboardAnchorPos(index);
 301         }
 302         break;
 303
 304     case Qt::Key_Right:
 305         if (index < itemCount - 1) {
 306             ++index;
 307             m_keyboardAnchorIndex = index;
 308             m_keyboardAnchorPos = keyboardAnchorPos(index);
 309         }
 310         break;
 311
 312     case Qt::Key_Up:
 313         updateKeyboardAnchor();
 314         index = previousRowIndex(index);
 315         break;
 316
 317     case Qt::Key_Down:
 318         updateKeyboardAnchor();
 319         index = nextRowIndex(index);
 320         break;
 321
 322     case Qt::Key_PageUp:
 323         if (m_view->scrollOrientation() == Qt::Horizontal) {
 324             // The new current index should correspond to the first item in the current column.
 325             int newIndex = qMax(index - 1, 0);
 326             while (newIndex != index && m_view->itemRect(newIndex).topLeft().y() < m_view->itemRect(index).topLeft().y()) {
 327                 index = newIndex;
 328                 newIndex = qMax(index - 1, 0);
 329             }
 330             m_keyboardAnchorIndex = index;
 331             m_keyboardAnchorPos = keyboardAnchorPos(index);
 332         } else {
 333             const qreal currentItemBottom = m_view->itemRect(index).bottomLeft().y();
 334             const qreal height = m_view->geometry().height();
 335
 336             // The new current item should be the first item in the current
 337             // column whose itemRect's top coordinate is larger than targetY.
 338             const qreal targetY = currentItemBottom - height;
 339
 340             updateKeyboardAnchor();
 341             int newIndex = previousRowIndex(index);
 342             do {
 343                 index = newIndex;
 344                 updateKeyboardAnchor();
 345                 newIndex = previousRowIndex(index);
 346             } while (m_view->itemRect(newIndex).topLeft().y() > targetY && newIndex != index);
 347         }
 348         break;
 349
 350     case Qt::Key_PageDown:
 351         if (m_view->scrollOrientation() == Qt::Horizontal) {
 352             // The new current index should correspond to the last item in the current column.
 353             int newIndex = qMin(index + 1, m_model->count() - 1);
 354             while (newIndex != index && m_view->itemRect(newIndex).topLeft().y() > m_view->itemRect(index).topLeft().y()) {
 355                 index = newIndex;
 356                 newIndex = qMin(index + 1, m_model->count() - 1);
 357             }
 358             m_keyboardAnchorIndex = index;
 359             m_keyboardAnchorPos = keyboardAnchorPos(index);
 360         } else {
 361             const qreal currentItemTop = m_view->itemRect(index).topLeft().y();
 362             const qreal height = m_view->geometry().height();
 363
 364             // The new current item should be the last item in the current
 365             // column whose itemRect's bottom coordinate is smaller than targetY.
 366             const qreal targetY = currentItemTop + height;
 367
 368             updateKeyboardAnchor();
 369             int newIndex = nextRowIndex(index);
 370             do {
 371                 index = newIndex;
 372                 updateKeyboardAnchor();
 373                 newIndex = nextRowIndex(index);
 374             } while (m_view->itemRect(newIndex).bottomLeft().y() < targetY && newIndex != index);
 375         }
 376         break;
 377
 378     case Qt::Key_Enter:
 379     case Qt::Key_Return: {
 380         const KItemSet selectedItems = m_selectionManager->selectedItems();
 381         if (selectedItems.count() >= 2) {
 382             emit itemsActivated(selectedItems);
 383         } else if (selectedItems.count() == 1) {
 384             emit itemActivated(selectedItems.first());
 385         } else {
 386             emit itemActivated(index);
 387         }
 388         break;
 389     }
 390
 391     case Qt::Key_Menu: {
 392         // Emit the signal itemContextMenuRequested() in case if at least one
 393         // item is selected. Otherwise the signal viewContextMenuRequested() will be emitted.
 394         const KItemSet selectedItems = m_selectionManager->selectedItems();
 395         int index = -1;
 396         if (selectedItems.count() >= 2) {
 397             const int currentItemIndex = m_selectionManager->currentItem();
 398             index = selectedItems.contains(currentItemIndex)
 399                     ? currentItemIndex : selectedItems.first();
 400         } else if (selectedItems.count() == 1) {
 401             index = selectedItems.first();
 402         }
 403
 404         if (index >= 0) {
 405             const QRectF contextRect = m_view->itemContextRect(index);
 406             const QPointF pos(m_view->scene()->views().first()->mapToGlobal(contextRect.bottomRight().toPoint()));
 407             emit itemContextMenuRequested(index, pos);
 408         } else {
 409             emit viewContextMenuRequested(QCursor::pos());
 410         }
 411         break;
 412     }
 413
 414     case Qt::Key_Escape:
 415         if (m_selectionBehavior != SingleSelection) {
 416             m_selectionManager->clearSelection();
 417         }
 418         m_keyboardManager->cancelSearch();
 419         emit escapePressed();
 420         break;
 421
 422     case Qt::Key_Space:
 423         if (m_selectionBehavior == MultiSelection) {
 424             if (controlPressed) {
 425                 // Toggle the selection state of the current item.
 426                 m_selectionManager->endAnchoredSelection();
 427                 m_selectionManager->setSelected(index, 1, KItemListSelectionManager::Toggle);
 428                 m_selectionManager->beginAnchoredSelection(index);
 429                 break;
 430             } else {
 431                 // Select the current item if it is not selected yet.
 432                 const int current = m_selectionManager->currentItem();
 433                 if (!m_selectionManager->isSelected(current)) {
 434                     m_selectionManager->setSelected(current);
 435                     break;
 436                 }
 437             }
 438         }
 439         // Fall through to the default case and add the Space to the current search string.
 440
 441     default:
 442         m_keyboardManager->addKeys(event->text());
 443         // Make sure unconsumed events get propagated up the chain. #302329
 444         event->ignore();
 445         return false;
 446     }
 447
 448     if (m_selectionManager->currentItem() != index) {
 449         switch (m_selectionBehavior) {
 450         case NoSelection:
 451             m_selectionManager->setCurrentItem(index);
 452             break;
 453
 454         case SingleSelection:
 455             m_selectionManager->setCurrentItem(index);
 456             m_selectionManager->clearSelection();
 457             m_selectionManager->setSelected(index, 1);
 458             break;
 459
 460         case MultiSelection:
 461             if (controlPressed) {
 462                 m_selectionManager->endAnchoredSelection();
 463             }
 464
 465             m_selectionManager->setCurrentItem(index);
 466
 467             if (!shiftOrControlPressed) {
 468                 m_selectionManager->clearSelection();
 469                 m_selectionManager->setSelected(index, 1);
 470             }
 471
 472             if (!shiftPressed) {
 473                 m_selectionManager->beginAnchoredSelection(index);
 474             }
 475             break;
 476         }
 477
 478         m_view->scrollToItem(index);
 479     }
 480     return true;
 481 }
 482
 483 void KItemListController::slotChangeCurrentItem(const QString& text, bool searchFromNextItem)
 484 {
 485     if (!m_model || m_model->count() == 0) {
 486         return;
 487     }
 488     const int currentIndex = m_selectionManager->currentItem();
 489     int index;
 490     if (searchFromNextItem) {
 491         index = m_model->indexForKeyboardSearch(text, (currentIndex + 1) % m_model->count());
 492     } else {
 493         index = m_model->indexForKeyboardSearch(text, currentIndex);
 494     }
 495     if (index >= 0) {
 496         m_selectionManager->setCurrentItem(index);
 497
 498         if (m_selectionBehavior != NoSelection) {
 499             m_selectionManager->clearSelection();
 500             m_selectionManager->setSelected(index, 1);
 501             m_selectionManager->beginAnchoredSelection(index);
 502         }
 503
 504         m_view->scrollToItem(index);
 505     }
 506 }
 507
 508 void KItemListController::slotAutoActivationTimeout()
 509 {
 510     if (!m_model || !m_view) {
 511         return;
 512     }
 513
 514     const int index = m_autoActivationTimer->property("index").toInt();
 515     if (index < 0 || index >= m_model->count()) {
 516         return;
 517     }
 518
 519     /* m_view->isUnderMouse() fixes a bug in the Folder-View-Panel and in the
 520      * Places-Panel.
 521      *
 522      * Bug: When you drag a file onto a Folder-View-Item or a Places-Item and
 523      * then move away before the auto-activation timeout triggers, than the
 524      * item still becomes activated/expanded.
 525      *
 526      * See Bug 293200 and 305783
 527      */
 528     if (m_model->supportsDropping(index) && m_view->isUnderMouse()) {
 529         if (m_view->supportsItemExpanding() && m_model->isExpandable(index)) {
 530             const bool expanded = m_model->isExpanded(index);
 531             m_model->setExpanded(index, !expanded);
 532         } else if (m_autoActivationBehavior != ExpansionOnly) {
 533             emit itemActivated(index);
 534         }
 535     }
 536 }
 537
 538 bool KItemListController::inputMethodEvent(QInputMethodEvent* event)
 539 {
 540     Q_UNUSED(event);
 541     return false;
 542 }
 543
 544 bool KItemListController::mousePressEvent(QGraphicsSceneMouseEvent* event, const QTransform& transform)
 545 {
 546     if (!m_view) {
 547         return false;
 548     }
 549
 550     m_pressedMousePos = transform.map(event->pos());
 551     m_pressedIndex = m_view->itemAt(m_pressedMousePos);
 552     emit mouseButtonPressed(m_pressedIndex, event->buttons());
 553
 554     if (event->buttons() & (Qt::BackButton | Qt::ForwardButton)) {
 555         // Do not select items when clicking the back/forward buttons, see
 556         // https://bugs.kde.org/show_bug.cgi?id=327412.
 557         return true;
 558     }
 559
 560     if (m_view->isAboveExpansionToggle(m_pressedIndex, m_pressedMousePos)) {
 561         m_selectionManager->endAnchoredSelection();
 562         m_selectionManager->setCurrentItem(m_pressedIndex);
 563         m_selectionManager->beginAnchoredSelection(m_pressedIndex);
 564         return true;
 565     }
 566
 567     m_selectionTogglePressed = m_view->isAboveSelectionToggle(m_pressedIndex, m_pressedMousePos);
 568     if (m_selectionTogglePressed) {
 569         m_selectionManager->setSelected(m_pressedIndex, 1, KItemListSelectionManager::Toggle);
 570         // The previous anchored selection has been finished already in
 571         // KItemListSelectionManager::setSelected(). We can safely change
 572         // the current item and start a new anchored selection now.
 573         m_selectionManager->setCurrentItem(m_pressedIndex);
 574         m_selectionManager->beginAnchoredSelection(m_pressedIndex);
 575         return true;
 576     }
 577
 578     const bool shiftPressed = event->modifiers() & Qt::ShiftModifier;
 579     const bool controlPressed = event->modifiers() & Qt::ControlModifier;
 580
 581     // The previous selection is cleared if either
 582     // 1. The selection mode is SingleSelection, or
 583     // 2. the selection mode is MultiSelection, and *none* of the following conditions are met:
 584     //    a) Shift or Control are pressed.
 585     //    b) The clicked item is selected already. In that case, the user might want to:
 586     //       - start dragging multiple items, or
 587     //       - open the context menu and perform an action for all selected items.
 588     const bool shiftOrControlPressed = shiftPressed || controlPressed;
 589     const bool pressedItemAlreadySelected = m_pressedIndex >= 0 && m_selectionManager->isSelected(m_pressedIndex);
 590     const bool clearSelection = m_selectionBehavior == SingleSelection ||
 591                                 (!shiftOrControlPressed && !pressedItemAlreadySelected);
 592     if (clearSelection) {
 593         m_selectionManager->clearSelection();
 594     } else if (pressedItemAlreadySelected && !shiftOrControlPressed && (event->buttons() & Qt::LeftButton)) {
 595         // The user might want to start dragging multiple items, but if he clicks the item
 596         // in order to trigger it instead, the other selected items must be deselected.
 597         // However, we do not know yet what the user is going to do.
 598         // -> remember that the user pressed an item which had been selected already and
 599         //    clear the selection in mouseReleaseEvent(), unless the items are dragged.
 600         m_clearSelectionIfItemsAreNotDragged = true;
 601
 602         if (m_selectionManager->selectedItems().count() == 1 && m_view->isAboveText(m_pressedIndex, m_pressedMousePos)) {
 603             emit selectedItemTextPressed(m_pressedIndex);
 604         }
 605     }
 606
 607     if (!shiftPressed) {
 608         // Finish the anchored selection before the current index is changed
 609         m_selectionManager->endAnchoredSelection();
 610     }
 611
 612     if (m_pressedIndex >= 0) {
 613         m_selectionManager->setCurrentItem(m_pressedIndex);
 614
 615         switch (m_selectionBehavior) {
 616         case NoSelection:
 617             break;
 618
 619         case SingleSelection:
 620             m_selectionManager->setSelected(m_pressedIndex);
 621             break;
 622
 623         case MultiSelection:
 624             if (controlPressed && !shiftPressed) {
 625                 m_selectionManager->setSelected(m_pressedIndex, 1, KItemListSelectionManager::Toggle);
 626                 m_selectionManager->beginAnchoredSelection(m_pressedIndex);
 627             } else if (!shiftPressed || !m_selectionManager->isAnchoredSelectionActive()) {
 628                 // Select the pressed item and start a new anchored selection
 629                 m_selectionManager->setSelected(m_pressedIndex, 1, KItemListSelectionManager::Select);
 630                 m_selectionManager->beginAnchoredSelection(m_pressedIndex);
 631             }
 632             break;
 633
 634         default:
 635             Q_ASSERT(false);
 636             break;
 637         }
 638
 639         if (event->buttons() & Qt::RightButton) {
 640             emit itemContextMenuRequested(m_pressedIndex, event->screenPos());
 641         }
 642
 643         return true;
 644     }
 645
 646     if (event->buttons() & Qt::RightButton) {
 647         const QRectF headerBounds = m_view->headerBoundaries();
 648         if (headerBounds.contains(event->pos())) {
 649             emit headerContextMenuRequested(event->screenPos());
 650         } else {
 651             emit viewContextMenuRequested(event->screenPos());
 652         }
 653         return true;
 654     }
 655
 656     if (m_selectionBehavior == MultiSelection) {
 657         QPointF startPos = m_pressedMousePos;
 658         if (m_view->scrollOrientation() == Qt::Vertical) {
 659             startPos.ry() += m_view->scrollOffset();
 660             if (m_view->itemSize().width() < 0) {
 661                 // Use a special rubberband for views that have only one column and
 662                 // expand the rubberband to use the whole width of the view.
 663                 startPos.setX(0);
 664             }
 665         } else {
 666             startPos.rx() += m_view->scrollOffset();
 667         }
 668
 669         m_oldSelection = m_selectionManager->selectedItems();
 670         KItemListRubberBand* rubberBand = m_view->rubberBand();
 671         rubberBand->setStartPosition(startPos);
 672         rubberBand->setEndPosition(startPos);
 673         rubberBand->setActive(true);
 674         connect(rubberBand, &KItemListRubberBand::endPositionChanged, this, &KItemListController::slotRubberBandChanged);
 675         m_view->setAutoScroll(true);
 676     }
 677
 678     return false;
 679 }
 680
 681 bool KItemListController::mouseMoveEvent(QGraphicsSceneMouseEvent* event, const QTransform& transform)
 682 {
 683     if (!m_view) {
 684         return false;
 685     }
 686
 687     if (m_pressedIndex >= 0) {
 688         // Check whether a dragging should be started
 689         if (event->buttons() & Qt::LeftButton) {
 690             const QPointF pos = transform.map(event->pos());
 691             if ((pos - m_pressedMousePos).manhattanLength() >= QApplication::startDragDistance()) {
 692                 if (!m_selectionManager->isSelected(m_pressedIndex)) {
 693                     // Always assure that the dragged item gets selected. Usually this is already
 694                     // done on the mouse-press event, but when using the selection-toggle on a
 695                     // selected item the dragged item is not selected yet.
 696                     m_selectionManager->setSelected(m_pressedIndex, 1, KItemListSelectionManager::Toggle);
 697                 } else {
 698                     // A selected item has been clicked to drag all selected items
 699                     // -> the selection should not be cleared when the mouse button is released.
 700                     m_clearSelectionIfItemsAreNotDragged = false;
 701                 }
 702
 703                 startDragging();
 704             }
 705         }
 706     } else {
 707         KItemListRubberBand* rubberBand = m_view->rubberBand();
 708         if (rubberBand->isActive()) {
 709             QPointF endPos = transform.map(event->pos());
 710
 711             // Update the current item.
 712             const int newCurrent = m_view->itemAt(endPos);
 713             if (newCurrent >= 0) {
 714                 // It's expected that the new current index is also the new anchor (bug 163451).
 715                 m_selectionManager->endAnchoredSelection();
 716                 m_selectionManager->setCurrentItem(newCurrent);
 717                 m_selectionManager->beginAnchoredSelection(newCurrent);
 718             }
 719
 720             if (m_view->scrollOrientation() == Qt::Vertical) {
 721                 endPos.ry() += m_view->scrollOffset();
 722                 if (m_view->itemSize().width() < 0) {
 723                     // Use a special rubberband for views that have only one column and
 724                     // expand the rubberband to use the whole width of the view.
 725                     endPos.setX(m_view->size().width());
 726                 }
 727             } else {
 728                 endPos.rx() += m_view->scrollOffset();
 729             }
 730             rubberBand->setEndPosition(endPos);
 731         }
 732     }
 733
 734     return false;
 735 }
 736
 737 bool KItemListController::mouseReleaseEvent(QGraphicsSceneMouseEvent* event, const QTransform& transform)
 738 {
 739     if (!m_view) {
 740         return false;
 741     }
 742
 743     emit mouseButtonReleased(m_pressedIndex, event->buttons());
 744
 745     const bool isAboveSelectionToggle = m_view->isAboveSelectionToggle(m_pressedIndex, m_pressedMousePos);
 746     if (isAboveSelectionToggle) {
 747         m_selectionTogglePressed = false;
 748         return true;
 749     }
 750
 751     if (!isAboveSelectionToggle && m_selectionTogglePressed) {
 752         m_selectionManager->setSelected(m_pressedIndex, 1, KItemListSelectionManager::Toggle);
 753         m_selectionTogglePressed = false;
 754         return true;
 755     }
 756
 757     const bool shiftOrControlPressed = event->modifiers() & Qt::ShiftModifier ||
 758                                        event->modifiers() & Qt::ControlModifier;
 759
 760     KItemListRubberBand* rubberBand = m_view->rubberBand();
 761     if (rubberBand->isActive()) {
 762         disconnect(rubberBand, &KItemListRubberBand::endPositionChanged, this, &KItemListController::slotRubberBandChanged);
 763         rubberBand->setActive(false);
 764         m_oldSelection.clear();
 765         m_view->setAutoScroll(false);
 766     }
 767
 768     const QPointF pos = transform.map(event->pos());
 769     const int index = m_view->itemAt(pos);
 770
 771     if (index >= 0 && index == m_pressedIndex) {
 772         // The release event is done above the same item as the press event
 773
 774         if (m_clearSelectionIfItemsAreNotDragged) {
 775             // A selected item has been clicked, but no drag operation has been started
 776             // -> clear the rest of the selection.
 777             m_selectionManager->clearSelection();
 778             m_selectionManager->setSelected(m_pressedIndex, 1, KItemListSelectionManager::Select);
 779             m_selectionManager->beginAnchoredSelection(m_pressedIndex);
 780         }
 781
 782         if (event->button() & Qt::LeftButton) {
 783             bool emitItemActivated = true;
 784             if (m_view->isAboveExpansionToggle(index, pos)) {
 785                 const bool expanded = m_model->isExpanded(index);
 786                 m_model->setExpanded(index, !expanded);
 787
 788                 emit itemExpansionToggleClicked(index);
 789                 emitItemActivated = false;
 790             } else if (shiftOrControlPressed) {
 791                 // The mouse click should only update the selection, not trigger the item
 792                 emitItemActivated = false;
 793             } else if (!(m_view->style()->styleHint(QStyle::SH_ItemView_ActivateItemOnSingleClick) || m_singleClickActivationEnforced)) {
 794                 emitItemActivated = false;
 795             }
 796             if (emitItemActivated) {
 797                 emit itemActivated(index);
 798             }
 799         } else if (event->button() & Qt::MidButton) {
 800             emit itemMiddleClicked(index);
 801         }
 802     }
 803
 804     m_pressedMousePos = QPointF();
 805     m_pressedIndex = -1;
 806     m_clearSelectionIfItemsAreNotDragged = false;
 807     return false;
 808 }
 809
 810 bool KItemListController::mouseDoubleClickEvent(QGraphicsSceneMouseEvent* event, const QTransform& transform)
 811 {
 812     const QPointF pos = transform.map(event->pos());
 813     const int index = m_view->itemAt(pos);
 814
 815     // Expand item if desired - See Bug 295573
 816     if (m_mouseDoubleClickAction != ActivateItemOnly) {
 817         if (m_view && m_model && m_view->supportsItemExpanding() && m_model->isExpandable(index)) {
 818             const bool expanded = m_model->isExpanded(index);
 819             m_model->setExpanded(index, !expanded);
 820         }
 821     }
 822
 823     if (event->button() & Qt::RightButton) {
 824         m_selectionManager->clearSelection();
 825         if (index >= 0) {
 826             m_selectionManager->setSelected(index);
 827             emit itemContextMenuRequested(index, event->screenPos());
 828         } else {
 829             const QRectF headerBounds = m_view->headerBoundaries();
 830             if (headerBounds.contains(event->pos())) {
 831                 emit headerContextMenuRequested(event->screenPos());
 832             } else {
 833                 emit viewContextMenuRequested(event->screenPos());
 834             }
 835         }
 836         return true;
 837     }
 838
 839     bool emitItemActivated = !(m_view->style()->styleHint(QStyle::SH_ItemView_ActivateItemOnSingleClick) || m_singleClickActivationEnforced) &&
 840                              (event->button() & Qt::LeftButton) &&
 841                              index >= 0 && index < m_model->count();
 842     if (emitItemActivated) {
 843         emit itemActivated(index);
 844     }
 845     return false;
 846 }
 847
 848 bool KItemListController::dragEnterEvent(QGraphicsSceneDragDropEvent* event, const QTransform& transform)
 849 {
 850     Q_UNUSED(event);
 851     Q_UNUSED(transform);
 852
 853     DragAndDropHelper::clearUrlListMatchesUrlCache();
 854
 855     return false;
 856 }
 857
 858 bool KItemListController::dragLeaveEvent(QGraphicsSceneDragDropEvent* event, const QTransform& transform)
 859 {
 860     Q_UNUSED(event);
 861     Q_UNUSED(transform);
 862
 863     m_autoActivationTimer->stop();
 864     m_view->setAutoScroll(false);
 865     m_view->hideDropIndicator();
 866
 867     KItemListWidget* widget = hoveredWidget();
 868     if (widget) {
 869         widget->setHovered(false);
 870         emit itemUnhovered(widget->index());
 871     }
 872     return false;
 873 }
 874
 875 bool KItemListController::dragMoveEvent(QGraphicsSceneDragDropEvent* event, const QTransform& transform)
 876 {
 877     if (!m_model || !m_view) {
 878         return false;
 879     }
 880
 881
 882     QUrl hoveredDir = m_model->directory();
 883     KItemListWidget* oldHoveredWidget = hoveredWidget();
 884
 885     const QPointF pos = transform.map(event->pos());
 886     KItemListWidget* newHoveredWidget = widgetForPos(pos);
 887
 888     if (oldHoveredWidget != newHoveredWidget) {
 889         m_autoActivationTimer->stop();
 890
 891         if (oldHoveredWidget) {
 892             oldHoveredWidget->setHovered(false);
 893             emit itemUnhovered(oldHoveredWidget->index());
 894         }
 895     }
 896
 897     if (newHoveredWidget) {
 898         bool droppingBetweenItems = false;
 899         if (m_model->sortRole().isEmpty()) {
 900             // The model supports inserting items between other items.
 901             droppingBetweenItems = (m_view->showDropIndicator(pos) >= 0);
 902         }
 903
 904         const int index = newHoveredWidget->index();
 905
 906         if (m_model->isDir(index)) {
 907             hoveredDir = m_model->url(index);
 908         }
 909
 910         if (!droppingBetweenItems) {
 911             if (m_model->supportsDropping(index)) {
 912                 // Something has been dragged on an item.
 913                 m_view->hideDropIndicator();
 914                 if (!newHoveredWidget->isHovered()) {
 915                     newHoveredWidget->setHovered(true);
 916                     emit itemHovered(index);
 917                 }
 918
 919                 if (!m_autoActivationTimer->isActive() && m_autoActivationTimer->interval() >= 0) {
 920                     m_autoActivationTimer->setProperty("index", index);
 921                     m_autoActivationTimer->start();
 922                 }
 923             }
 924         } else {
 925             m_autoActivationTimer->stop();
 926             if (newHoveredWidget && newHoveredWidget->isHovered()) {
 927                 newHoveredWidget->setHovered(false);
 928                 emit itemUnhovered(index);
 929             }
 930         }
 931     } else {
 932         m_view->hideDropIndicator();
 933     }
 934
 935     event->setAccepted(!DragAndDropHelper::urlListMatchesUrl(event->mimeData()->urls(), hoveredDir));
 936
 937     return false;
 938 }
 939
 940 bool KItemListController::dropEvent(QGraphicsSceneDragDropEvent* event, const QTransform& transform)
 941 {
 942     if (!m_view) {
 943         return false;
 944     }
 945
 946     m_autoActivationTimer->stop();
 947     m_view->setAutoScroll(false);
 948
 949     const QPointF pos = transform.map(event->pos());
 950
 951     int dropAboveIndex = -1;
 952     if (m_model->sortRole().isEmpty()) {
 953         // The model supports inserting of items between other items.
 954         dropAboveIndex = m_view->showDropIndicator(pos);
 955     }
 956
 957     if (dropAboveIndex >= 0) {
 958         // Something has been dropped between two items.
 959         m_view->hideDropIndicator();
 960         emit aboveItemDropEvent(dropAboveIndex, event);
 961     } else if (!event->mimeData()->hasFormat(m_model->blacklistItemDropEventMimeType())) {
 962         // Something has been dropped on an item or on an empty part of the view.
 963         emit itemDropEvent(m_view->itemAt(pos), event);
 964     }
 965
 966     QAccessibleEvent accessibilityEvent(view(), QAccessible::DragDropEnd);
 967     QAccessible::updateAccessibility(&accessibilityEvent);
 968
 969     return true;
 970 }
 971
 972 bool KItemListController::hoverEnterEvent(QGraphicsSceneHoverEvent* event, const QTransform& transform)
 973 {
 974     Q_UNUSED(event);
 975     Q_UNUSED(transform);
 976     return false;
 977 }
 978
 979 bool KItemListController::hoverMoveEvent(QGraphicsSceneHoverEvent* event, const QTransform& transform)
 980 {
 981     Q_UNUSED(transform);
 982     if (!m_model || !m_view) {
 983         return false;
 984     }
 985
 986     KItemListWidget* oldHoveredWidget = hoveredWidget();
 987     const QPointF pos = transform.map(event->pos());
 988     KItemListWidget* newHoveredWidget = widgetForPos(pos);
 989
 990     if (oldHoveredWidget != newHoveredWidget) {
 991         if (oldHoveredWidget) {
 992             oldHoveredWidget->setHovered(false);
 993             emit itemUnhovered(oldHoveredWidget->index());
 994         }
 995
 996         if (newHoveredWidget) {
 997             newHoveredWidget->setHovered(true);
 998             const QPointF mappedPos = newHoveredWidget->mapFromItem(m_view, pos);
 999             newHoveredWidget->setHoverPosition(mappedPos);
1000             emit itemHovered(newHoveredWidget->index());
1001         }
1002     } else if (oldHoveredWidget) {
1003         const QPointF mappedPos = oldHoveredWidget->mapFromItem(m_view, pos);
1004         oldHoveredWidget->setHoverPosition(mappedPos);
1005     }
1006
1007     return false;
1008 }
1009
1010 bool KItemListController::hoverLeaveEvent(QGraphicsSceneHoverEvent* event, const QTransform& transform)
1011 {
1012     Q_UNUSED(event);
1013     Q_UNUSED(transform);
1014
1015     if (!m_model || !m_view) {
1016         return false;
1017     }
1018
1019     foreach (KItemListWidget* widget, m_view->visibleItemListWidgets()) {
1020         if (widget->isHovered()) {
1021             widget->setHovered(false);
1022             emit itemUnhovered(widget->index());
1023         }
1024     }
1025     return false;
1026 }
1027
1028 bool KItemListController::wheelEvent(QGraphicsSceneWheelEvent* event, const QTransform& transform)
1029 {
1030     Q_UNUSED(event);
1031     Q_UNUSED(transform);
1032     return false;
1033 }
1034
1035 bool KItemListController::resizeEvent(QGraphicsSceneResizeEvent* event, const QTransform& transform)
1036 {
1037     Q_UNUSED(event);
1038     Q_UNUSED(transform);
1039     return false;
1040 }
1041
1042 bool KItemListController::processEvent(QEvent* event, const QTransform& transform)
1043 {
1044     if (!event) {
1045         return false;
1046     }
1047
1048     switch (event->type()) {
1049     case QEvent::KeyPress:
1050         return keyPressEvent(static_cast<QKeyEvent*>(event));
1051     case QEvent::InputMethod:
1052         return inputMethodEvent(static_cast<QInputMethodEvent*>(event));
1053     case QEvent::GraphicsSceneMousePress:
1054         return mousePressEvent(static_cast<QGraphicsSceneMouseEvent*>(event), QTransform());
1055     case QEvent::GraphicsSceneMouseMove:
1056         return mouseMoveEvent(static_cast<QGraphicsSceneMouseEvent*>(event), QTransform());
1057     case QEvent::GraphicsSceneMouseRelease:
1058         return mouseReleaseEvent(static_cast<QGraphicsSceneMouseEvent*>(event), QTransform());
1059     case QEvent::GraphicsSceneMouseDoubleClick:
1060         return mouseDoubleClickEvent(static_cast<QGraphicsSceneMouseEvent*>(event), QTransform());
1061     case QEvent::GraphicsSceneWheel:
1062          return wheelEvent(static_cast<QGraphicsSceneWheelEvent*>(event), QTransform());
1063     case QEvent::GraphicsSceneDragEnter:
1064         return dragEnterEvent(static_cast<QGraphicsSceneDragDropEvent*>(event), QTransform());
1065     case QEvent::GraphicsSceneDragLeave:
1066         return dragLeaveEvent(static_cast<QGraphicsSceneDragDropEvent*>(event), QTransform());
1067     case QEvent::GraphicsSceneDragMove:
1068         return dragMoveEvent(static_cast<QGraphicsSceneDragDropEvent*>(event), QTransform());
1069     case QEvent::GraphicsSceneDrop:
1070         return dropEvent(static_cast<QGraphicsSceneDragDropEvent*>(event), QTransform());
1071     case QEvent::GraphicsSceneHoverEnter:
1072         return hoverEnterEvent(static_cast<QGraphicsSceneHoverEvent*>(event), QTransform());
1073     case QEvent::GraphicsSceneHoverMove:
1074         return hoverMoveEvent(static_cast<QGraphicsSceneHoverEvent*>(event), QTransform());
1075     case QEvent::GraphicsSceneHoverLeave:
1076         return hoverLeaveEvent(static_cast<QGraphicsSceneHoverEvent*>(event), QTransform());
1077     case QEvent::GraphicsSceneResize:
1078         return resizeEvent(static_cast<QGraphicsSceneResizeEvent*>(event), transform);
1079     default:
1080         break;
1081     }
1082
1083     return false;
1084 }
1085
1086 void KItemListController::slotViewScrollOffsetChanged(qreal current, qreal previous)
1087 {
1088     if (!m_view) {
1089         return;
1090     }
1091
1092     KItemListRubberBand* rubberBand = m_view->rubberBand();
1093     if (rubberBand->isActive()) {
1094         const qreal diff = current - previous;
1095         // TODO: Ideally just QCursor::pos() should be used as
1096         // new end-position but it seems there is no easy way
1097         // to have something like QWidget::mapFromGlobal() for QGraphicsWidget
1098         // (... or I just missed an easy way to do the mapping)
1099         QPointF endPos = rubberBand->endPosition();
1100         if (m_view->scrollOrientation() == Qt::Vertical) {
1101             endPos.ry() += diff;
1102         } else {
1103             endPos.rx() += diff;
1104         }
1105
1106         rubberBand->setEndPosition(endPos);
1107     }
1108 }
1109
1110 void KItemListController::slotRubberBandChanged()
1111 {
1112     if (!m_view || !m_model || m_model->count() <= 0) {
1113         return;
1114     }
1115
1116     const KItemListRubberBand* rubberBand = m_view->rubberBand();
1117     const QPointF startPos = rubberBand->startPosition();
1118     const QPointF endPos = rubberBand->endPosition();
1119     QRectF rubberBandRect = QRectF(startPos, endPos).normalized();
1120
1121     const bool scrollVertical = (m_view->scrollOrientation() == Qt::Vertical);
1122     if (scrollVertical) {
1123         rubberBandRect.translate(0, -m_view->scrollOffset());
1124     } else {
1125         rubberBandRect.translate(-m_view->scrollOffset(), 0);
1126     }
1127
1128     if (!m_oldSelection.isEmpty()) {
1129         // Clear the old selection that was available before the rubberband has
1130         // been activated in case if no Shift- or Control-key are pressed
1131         const bool shiftOrControlPressed = QApplication::keyboardModifiers() & Qt::ShiftModifier ||
1132                                            QApplication::keyboardModifiers() & Qt::ControlModifier;
1133         if (!shiftOrControlPressed) {
1134             m_oldSelection.clear();
1135         }
1136     }
1137
1138     KItemSet selectedItems;
1139
1140     // Select all visible items that intersect with the rubberband
1141     foreach (const KItemListWidget* widget, m_view->visibleItemListWidgets()) {
1142         const int index = widget->index();
1143
1144         const QRectF widgetRect = m_view->itemRect(index);
1145         if (widgetRect.intersects(rubberBandRect)) {
1146             const QRectF iconRect = widget->iconRect().translated(widgetRect.topLeft());
1147             const QRectF textRect = widget->textRect().translated(widgetRect.topLeft());
1148             if (iconRect.intersects(rubberBandRect) || textRect.intersects(rubberBandRect)) {
1149                 selectedItems.insert(index);
1150             }
1151         }
1152     }
1153
1154     // Select all invisible items that intersect with the rubberband. Instead of
1155     // iterating all items only the area which might be touched by the rubberband
1156     // will be checked.
1157     const bool increaseIndex = scrollVertical ?
1158                                startPos.y() > endPos.y(): startPos.x() > endPos.x();
1159
1160     int index = increaseIndex ? m_view->lastVisibleIndex() + 1 : m_view->firstVisibleIndex() - 1;
1161     bool selectionFinished = false;
1162     do {
1163         const QRectF widgetRect = m_view->itemRect(index);
1164         if (widgetRect.intersects(rubberBandRect)) {
1165             selectedItems.insert(index);
1166         }
1167
1168         if (increaseIndex) {
1169             ++index;
1170             selectionFinished = (index >= m_model->count()) ||
1171                                 ( scrollVertical && widgetRect.top()  > rubberBandRect.bottom()) ||
1172                                 (!scrollVertical && widgetRect.left() > rubberBandRect.right());
1173         } else {
1174             --index;
1175             selectionFinished = (index < 0) ||
1176                                 ( scrollVertical && widgetRect.bottom() < rubberBandRect.top()) ||
1177                                 (!scrollVertical && widgetRect.right()  < rubberBandRect.left());
1178         }
1179     } while (!selectionFinished);
1180
1181     if (QApplication::keyboardModifiers() & Qt::ControlModifier) {
1182         // If Control is pressed, the selection state of all items in the rubberband is toggled.
1183         // Therefore, the new selection contains:
1184         // 1. All previously selected items which are not inside the rubberband, and
1185         // 2. all items inside the rubberband which have not been selected previously.
1186         m_selectionManager->setSelectedItems(m_oldSelection ^ selectedItems);
1187     }
1188     else {
1189         m_selectionManager->setSelectedItems(selectedItems + m_oldSelection);
1190     }
1191 }
1192
1193 void KItemListController::startDragging()
1194 {
1195     if (!m_view || !m_model) {
1196         return;
1197     }
1198
1199     const KItemSet selectedItems = m_selectionManager->selectedItems();
1200     if (selectedItems.isEmpty()) {
1201         return;
1202     }
1203
1204     QMimeData* data = m_model->createMimeData(selectedItems);
1205     if (!data) {
1206         return;
1207     }
1208
1209     // The created drag object will be owned and deleted
1210     // by QApplication::activeWindow().
1211     QDrag* drag = new QDrag(QApplication::activeWindow());
1212     drag->setMimeData(data);
1213
1214     const QPixmap pixmap = m_view->createDragPixmap(selectedItems);
1215     drag->setPixmap(pixmap);
1216
1217     const QPoint hotSpot((pixmap.width() / pixmap.devicePixelRatio()) / 2, 0);
1218     drag->setHotSpot(hotSpot);
1219
1220     drag->exec(Qt::MoveAction | Qt::CopyAction | Qt::LinkAction, Qt::CopyAction);
1221
1222     QAccessibleEvent accessibilityEvent(view(), QAccessible::DragDropStart);
1223     QAccessible::updateAccessibility(&accessibilityEvent);
1224 }
1225
1226 KItemListWidget* KItemListController::hoveredWidget() const
1227 {
1228     Q_ASSERT(m_view);
1229
1230     foreach (KItemListWidget* widget, m_view->visibleItemListWidgets()) {
1231         if (widget->isHovered()) {
1232             return widget;
1233         }
1234     }
1235
1236     return nullptr;
1237 }
1238
1239 KItemListWidget* KItemListController::widgetForPos(const QPointF& pos) const
1240 {
1241     Q_ASSERT(m_view);
1242
1243     foreach (KItemListWidget* widget, m_view->visibleItemListWidgets()) {
1244         const QPointF mappedPos = widget->mapFromItem(m_view, pos);
1245
1246         const bool hovered = widget->contains(mappedPos) &&
1247                              !widget->expansionToggleRect().contains(mappedPos);
1248         if (hovered) {
1249             return widget;
1250         }
1251     }
1252
1253     return nullptr;
1254 }
1255
1256 void KItemListController::updateKeyboardAnchor()
1257 {
1258     const bool validAnchor = m_keyboardAnchorIndex >= 0 &&
1259                              m_keyboardAnchorIndex < m_model->count() &&
1260                              keyboardAnchorPos(m_keyboardAnchorIndex) == m_keyboardAnchorPos;
1261     if (!validAnchor) {
1262         const int index = m_selectionManager->currentItem();
1263         m_keyboardAnchorIndex = index;
1264         m_keyboardAnchorPos = keyboardAnchorPos(index);
1265     }
1266 }
1267
1268 int KItemListController::nextRowIndex(int index) const
1269 {
1270     if (m_keyboardAnchorIndex < 0) {
1271         return index;
1272     }
1273
1274     const int maxIndex = m_model->count() - 1;
1275     if (index == maxIndex) {
1276         return index;
1277     }
1278
1279     // Calculate the index of the last column inside the row of the current index
1280     int lastColumnIndex = index;
1281     while (keyboardAnchorPos(lastColumnIndex + 1) > keyboardAnchorPos(lastColumnIndex)) {
1282         ++lastColumnIndex;
1283         if (lastColumnIndex >= maxIndex) {
1284             return index;
1285         }
1286     }
1287
1288     // Based on the last column index go to the next row and calculate the nearest index
1289     // that is below the current index
1290     int nextRowIndex = lastColumnIndex + 1;
1291     int searchIndex = nextRowIndex;
1292     qreal minDiff = qAbs(m_keyboardAnchorPos - keyboardAnchorPos(nextRowIndex));
1293     while (searchIndex < maxIndex && keyboardAnchorPos(searchIndex + 1) > keyboardAnchorPos(searchIndex)) {
1294         ++searchIndex;
1295         const qreal searchDiff = qAbs(m_keyboardAnchorPos - keyboardAnchorPos(searchIndex));
1296         if (searchDiff < minDiff) {
1297             minDiff = searchDiff;
1298             nextRowIndex = searchIndex;
1299         }
1300     }
1301
1302     return nextRowIndex;
1303 }
1304
1305 int KItemListController::previousRowIndex(int index) const
1306 {
1307     if (m_keyboardAnchorIndex < 0 || index == 0) {
1308         return index;
1309     }
1310
1311     // Calculate the index of the first column inside the row of the current index
1312     int firstColumnIndex = index;
1313     while (keyboardAnchorPos(firstColumnIndex - 1) < keyboardAnchorPos(firstColumnIndex)) {
1314         --firstColumnIndex;
1315         if (firstColumnIndex <= 0) {
1316             return index;
1317         }
1318     }
1319
1320     // Based on the first column index go to the previous row and calculate the nearest index
1321     // that is above the current index
1322     int previousRowIndex = firstColumnIndex - 1;
1323     int searchIndex = previousRowIndex;
1324     qreal minDiff = qAbs(m_keyboardAnchorPos - keyboardAnchorPos(previousRowIndex));
1325     while (searchIndex > 0 && keyboardAnchorPos(searchIndex - 1) < keyboardAnchorPos(searchIndex)) {
1326         --searchIndex;
1327         const qreal searchDiff = qAbs(m_keyboardAnchorPos - keyboardAnchorPos(searchIndex));
1328         if (searchDiff < minDiff) {
1329             minDiff = searchDiff;
1330             previousRowIndex = searchIndex;
1331         }
1332     }
1333
1334     return previousRowIndex;
1335 }
1336
1337 qreal KItemListController::keyboardAnchorPos(int index) const
1338 {
1339     const QRectF itemRect = m_view->itemRect(index);
1340     if (!itemRect.isEmpty()) {
1341         return (m_view->scrollOrientation() == Qt::Vertical) ? itemRect.x() : itemRect.y();
1342     }
1343
1344     return 0;
1345 }
1346
1347 void KItemListController::updateExtendedSelectionRegion()
1348 {
1349     if (m_view) {
1350         const bool extend = (m_selectionBehavior != MultiSelection);
1351         KItemListStyleOption option = m_view->styleOption();
1352         if (option.extendedSelectionRegion != extend) {
1353             option.extendedSelectionRegion = extend;
1354             m_view->setStyleOption(option);
1355         }
1356     }
1357 }
1358