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