src/kitemviews/kitemlistcontroller.cpp

   1 /*
   2  * SPDX-FileCopyrightText: 2011 Peter Penz <peter.penz19@gmail.com>
   3  * SPDX-FileCopyrightText: 2012 Frank Reininghaus <frank78ac@googlemail.com>
   4  *
   5  * Based on the Itemviews NG project from Trolltech Labs
   6  *
   7  * SPDX-License-Identifier: GPL-2.0-or-later
   8  */
   9
  10 #include "kitemlistcontroller.h"
  11
  12 #include "kitemlistselectionmanager.h"
  13 #include "kitemlistview.h"
  14 #include "private/kitemlistkeyboardsearchmanager.h"
  15 #include "private/kitemlistrubberband.h"
  16 #include "views/draganddrophelper.h"
  17
  18 #include <KTwoFingerSwipe>
  19 #include <KTwoFingerTap>
  20 #include <KUrlMimeData>
  21
  22 #include <QAccessible>
  23 #include <QApplication>
  24 #include <QDrag>
  25 #include <QGesture>
  26 #include <QGraphicsScene>
  27 #include <QGraphicsSceneEvent>
  28 #include <QGraphicsView>
  29 #include <QMimeData>
  30 #include <QTimer>
  31 #include <QTouchEvent>
  32
  33 KItemListController::KItemListController(KItemModelBase *model, KItemListView *view, QObject *parent)
  34     : QObject(parent)
  35     , m_singleClickActivationEnforced(false)
  36     , m_selectionMode(false)
  37     , m_selectionTogglePressed(false)
  38     , m_clearSelectionIfItemsAreNotDragged(false)
  39     , m_isSwipeGesture(false)
  40     , m_dragActionOrRightClick(false)
  41     , m_scrollerIsScrolling(false)
  42     , m_pinchGestureInProgress(false)
  43     , m_mousePress(false)
  44     , m_isTouchEvent(false)
  45     , m_selectionBehavior(NoSelection)
  46     , m_autoActivationBehavior(ActivationAndExpansion)
  47     , m_mouseDoubleClickAction(ActivateItemOnly)
  48     , m_model(nullptr)
  49     , m_view(nullptr)
  50     , m_selectionManager(new KItemListSelectionManager(this))
  51     , m_keyboardManager(new KItemListKeyboardSearchManager(this))
  52     , m_pressedIndex(std::nullopt)
  53     , m_pressedMouseGlobalPos()
  54     , m_autoActivationTimer(nullptr)
  55     , m_swipeGesture(Qt::CustomGesture)
  56     , m_twoFingerTapGesture(Qt::CustomGesture)
  57     , m_oldSelection()
  58     , m_keyboardAnchorIndex(-1)
  59     , m_keyboardAnchorPos(0)
  60 {
  61     connect(m_keyboardManager, &KItemListKeyboardSearchManager::changeCurrentItem, this, &KItemListController::slotChangeCurrentItem);
  62     connect(m_selectionManager, &KItemListSelectionManager::currentChanged, m_keyboardManager, &KItemListKeyboardSearchManager::slotCurrentChanged);
  63     connect(m_selectionManager, &KItemListSelectionManager::selectionChanged, m_keyboardManager, &KItemListKeyboardSearchManager::slotSelectionChanged);
  64
  65     m_autoActivationTimer = new QTimer(this);
  66     m_autoActivationTimer->setSingleShot(true);
  67     m_autoActivationTimer->setInterval(-1);
  68     connect(m_autoActivationTimer, &QTimer::timeout, this, &KItemListController::slotAutoActivationTimeout);
  69
  70     setModel(model);
  71     setView(view);
  72
  73     m_swipeGesture = QGestureRecognizer::registerRecognizer(new KTwoFingerSwipeRecognizer());
  74     m_twoFingerTapGesture = QGestureRecognizer::registerRecognizer(new KTwoFingerTapRecognizer());
  75     view->grabGesture(m_swipeGesture);
  76     view->grabGesture(m_twoFingerTapGesture);
  77     view->grabGesture(Qt::TapGesture);
  78     view->grabGesture(Qt::TapAndHoldGesture);
  79     view->grabGesture(Qt::PinchGesture);
  80 }
  81
  82 KItemListController::~KItemListController()
  83 {
  84     setView(nullptr);
  85     Q_ASSERT(!m_view);
  86
  87     setModel(nullptr);
  88     Q_ASSERT(!m_model);
  89 }
  90
  91 void KItemListController::setModel(KItemModelBase *model)
  92 {
  93     if (m_model == model) {
  94         return;
  95     }
  96
  97     KItemModelBase *oldModel = m_model;
  98     if (oldModel) {
  99         oldModel->deleteLater();
 100     }
 101
 102     m_model = model;
 103     if (m_model) {
 104         m_model->setParent(this);
 105     }
 106
 107     if (m_view) {
 108         m_view->setModel(m_model);
 109     }
 110
 111     m_selectionManager->setModel(m_model);
 112
 113     Q_EMIT modelChanged(m_model, oldModel);
 114 }
 115
 116 KItemModelBase *KItemListController::model() const
 117 {
 118     return m_model;
 119 }
 120
 121 KItemListSelectionManager *KItemListController::selectionManager() const
 122 {
 123     return m_selectionManager;
 124 }
 125
 126 void KItemListController::setView(KItemListView *view)
 127 {
 128     if (m_view == view) {
 129         return;
 130     }
 131
 132     KItemListView *oldView = m_view;
 133     if (oldView) {
 134         disconnect(oldView, &KItemListView::scrollOffsetChanged, this, &KItemListController::slotViewScrollOffsetChanged);
 135         oldView->deleteLater();
 136     }
 137
 138     m_view = view;
 139
 140     if (m_view) {
 141         m_view->setParent(this);
 142         m_view->setController(this);
 143         m_view->setModel(m_model);
 144         connect(m_view, &KItemListView::scrollOffsetChanged, this, &KItemListController::slotViewScrollOffsetChanged);
 145         updateExtendedSelectionRegion();
 146     }
 147
 148     Q_EMIT viewChanged(m_view, oldView);
 149 }
 150
 151 KItemListView *KItemListController::view() const
 152 {
 153     return m_view;
 154 }
 155
 156 void KItemListController::setSelectionBehavior(SelectionBehavior behavior)
 157 {
 158     m_selectionBehavior = behavior;
 159     updateExtendedSelectionRegion();
 160 }
 161
 162 KItemListController::SelectionBehavior KItemListController::selectionBehavior() const
 163 {
 164     return m_selectionBehavior;
 165 }
 166
 167 void KItemListController::setAutoActivationBehavior(AutoActivationBehavior behavior)
 168 {
 169     m_autoActivationBehavior = behavior;
 170 }
 171
 172 KItemListController::AutoActivationBehavior KItemListController::autoActivationBehavior() const
 173 {
 174     return m_autoActivationBehavior;
 175 }
 176
 177 void KItemListController::setMouseDoubleClickAction(MouseDoubleClickAction action)
 178 {
 179     m_mouseDoubleClickAction = action;
 180 }
 181
 182 KItemListController::MouseDoubleClickAction KItemListController::mouseDoubleClickAction() const
 183 {
 184     return m_mouseDoubleClickAction;
 185 }
 186
 187 int KItemListController::indexCloseToMousePressedPosition() const
 188 {
 189     const QPointF pressedMousePos = m_view->transform().map(m_view->scene()->views().first()->mapFromGlobal(m_pressedMouseGlobalPos.toPoint()));
 190
 191     QHashIterator<KItemListWidget *, KItemListGroupHeader *> it(m_view->m_visibleGroups);
 192     while (it.hasNext()) {
 193         it.next();
 194         KItemListGroupHeader *groupHeader = it.value();
 195         const QPointF mappedToGroup = groupHeader->mapFromItem(nullptr, pressedMousePos);
 196         if (groupHeader->contains(mappedToGroup)) {
 197             return it.key()->index();
 198         }
 199     }
 200     return -1;
 201 }
 202
 203 void KItemListController::setAutoActivationDelay(int delay)
 204 {
 205     m_autoActivationTimer->setInterval(delay);
 206 }
 207
 208 int KItemListController::autoActivationDelay() const
 209 {
 210     return m_autoActivationTimer->interval();
 211 }
 212
 213 void KItemListController::setSingleClickActivationEnforced(bool singleClick)
 214 {
 215     m_singleClickActivationEnforced = singleClick;
 216 }
 217
 218 bool KItemListController::singleClickActivationEnforced() const
 219 {
 220     return m_singleClickActivationEnforced;
 221 }
 222
 223 void KItemListController::setSelectionModeEnabled(bool enabled)
 224 {
 225     m_selectionMode = enabled;
 226 }
 227
 228 bool KItemListController::selectionMode() const
 229 {
 230     return m_selectionMode;
 231 }
 232
 233 bool KItemListController::isSearchAsYouTypeActive() const
 234 {
 235     return m_keyboardManager->isSearchAsYouTypeActive();
 236 }
 237
 238 bool KItemListController::keyPressEvent(QKeyEvent *event)
 239 {
 240     int index = m_selectionManager->currentItem();
 241     int key = event->key();
 242     const bool shiftPressed = event->modifiers() & Qt::ShiftModifier;
 243
 244     // Handle the expanding/collapsing of items
 245     // expand / collapse all selected directories
 246     if (m_view->supportsItemExpanding() && m_model->isExpandable(index) && (key == Qt::Key_Right || key == Qt::Key_Left)) {
 247         const bool expandOrCollapse = key == Qt::Key_Right ? true : false;
 248         bool shouldReturn = m_model->setExpanded(index, expandOrCollapse);
 249
 250         // edit in reverse to preserve index of the first handled items
 251         const auto selectedItems = m_selectionManager->selectedItems();
 252         for (auto it = selectedItems.rbegin(); it != selectedItems.rend(); ++it) {
 253             shouldReturn |= m_model->setExpanded(*it, expandOrCollapse);
 254             if (!shiftPressed) {
 255                 m_selectionManager->setSelected(*it);
 256             }
 257         }
 258         if (shouldReturn) {
 259             // update keyboard anchors
 260             if (shiftPressed) {
 261                 m_keyboardAnchorIndex = selectedItems.count() > 0 ? qMin(index, selectedItems.last()) : index;
 262                 m_keyboardAnchorPos = keyboardAnchorPos(m_keyboardAnchorIndex);
 263             }
 264
 265             event->ignore();
 266             return true;
 267         }
 268     }
 269
 270     const bool controlPressed = event->modifiers() & Qt::ControlModifier;
 271     const bool shiftOrControlPressed = shiftPressed || controlPressed;
 272     const bool navigationPressed = key == Qt::Key_Home || key == Qt::Key_End || key == Qt::Key_PageUp || key == Qt::Key_PageDown || key == Qt::Key_Up
 273         || key == Qt::Key_Down || key == Qt::Key_Left || key == Qt::Key_Right;
 274
 275     const int itemCount = m_model->count();
 276
 277     // For horizontal scroll orientation, transform
 278     // the arrow keys to simplify the event handling.
 279     if (m_view->scrollOrientation() == Qt::Horizontal) {
 280         switch (key) {
 281         case Qt::Key_Up:
 282             key = Qt::Key_Left;
 283             break;
 284         case Qt::Key_Down:
 285             key = Qt::Key_Right;
 286             break;
 287         case Qt::Key_Left:
 288             key = Qt::Key_Up;
 289             break;
 290         case Qt::Key_Right:
 291             key = Qt::Key_Down;
 292             break;
 293         default:
 294             break;
 295         }
 296     }
 297
 298     const bool selectSingleItem = m_selectionBehavior != NoSelection && itemCount == 1 && navigationPressed;
 299
 300     if (selectSingleItem) {
 301         const int current = m_selectionManager->currentItem();
 302         m_selectionManager->setSelected(current);
 303         return true;
 304     }
 305
 306     switch (key) {
 307     case Qt::Key_Home:
 308         index = 0;
 309         m_keyboardAnchorIndex = index;
 310         m_keyboardAnchorPos = keyboardAnchorPos(index);
 311         break;
 312
 313     case Qt::Key_End:
 314         index = itemCount - 1;
 315         m_keyboardAnchorIndex = index;
 316         m_keyboardAnchorPos = keyboardAnchorPos(index);
 317         break;
 318
 319     case Qt::Key_Left:
 320         if (index > 0) {
 321             const int expandedParentsCount = m_model->expandedParentsCount(index);
 322             if (expandedParentsCount == 0) {
 323                 --index;
 324             } else {
 325                 // Go to the parent of the current item.
 326                 do {
 327                     --index;
 328                 } while (index > 0 && m_model->expandedParentsCount(index) == expandedParentsCount);
 329             }
 330             m_keyboardAnchorIndex = index;
 331             m_keyboardAnchorPos = keyboardAnchorPos(index);
 332         }
 333         break;
 334
 335     case Qt::Key_Right:
 336         if (index < itemCount - 1) {
 337             ++index;
 338             m_keyboardAnchorIndex = index;
 339             m_keyboardAnchorPos = keyboardAnchorPos(index);
 340         }
 341         break;
 342
 343     case Qt::Key_Up:
 344         updateKeyboardAnchor();
 345         if (shiftPressed && !m_selectionManager->isAnchoredSelectionActive() && m_selectionManager->isSelected(index)) {
 346             m_selectionManager->beginAnchoredSelection(index);
 347         }
 348         index = previousRowIndex(index);
 349         break;
 350
 351     case Qt::Key_Down:
 352         updateKeyboardAnchor();
 353         if (shiftPressed && !m_selectionManager->isAnchoredSelectionActive() && m_selectionManager->isSelected(index)) {
 354             m_selectionManager->beginAnchoredSelection(index);
 355         }
 356         index = nextRowIndex(index);
 357         break;
 358
 359     case Qt::Key_PageUp:
 360         if (m_view->scrollOrientation() == Qt::Horizontal) {
 361             // The new current index should correspond to the first item in the current column.
 362             int newIndex = qMax(index - 1, 0);
 363             while (newIndex != index && m_view->itemRect(newIndex).topLeft().y() < m_view->itemRect(index).topLeft().y()) {
 364                 index = newIndex;
 365                 newIndex = qMax(index - 1, 0);
 366             }
 367             m_keyboardAnchorIndex = index;
 368             m_keyboardAnchorPos = keyboardAnchorPos(index);
 369         } else {
 370             const qreal currentItemBottom = m_view->itemRect(index).bottomLeft().y();
 371             const qreal height = m_view->geometry().height();
 372
 373             // The new current item should be the first item in the current
 374             // column whose itemRect's top coordinate is larger than targetY.
 375             const qreal targetY = currentItemBottom - height;
 376
 377             updateKeyboardAnchor();
 378             int newIndex = previousRowIndex(index);
 379             do {
 380                 index = newIndex;
 381                 updateKeyboardAnchor();
 382                 newIndex = previousRowIndex(index);
 383             } while (m_view->itemRect(newIndex).topLeft().y() > targetY && newIndex != index);
 384         }
 385         break;
 386
 387     case Qt::Key_PageDown:
 388         if (m_view->scrollOrientation() == Qt::Horizontal) {
 389             // The new current index should correspond to the last item in the current column.
 390             int newIndex = qMin(index + 1, m_model->count() - 1);
 391             while (newIndex != index && m_view->itemRect(newIndex).topLeft().y() > m_view->itemRect(index).topLeft().y()) {
 392                 index = newIndex;
 393                 newIndex = qMin(index + 1, m_model->count() - 1);
 394             }
 395             m_keyboardAnchorIndex = index;
 396             m_keyboardAnchorPos = keyboardAnchorPos(index);
 397         } else {
 398             const qreal currentItemTop = m_view->itemRect(index).topLeft().y();
 399             const qreal height = m_view->geometry().height();
 400
 401             // The new current item should be the last item in the current
 402             // column whose itemRect's bottom coordinate is smaller than targetY.
 403             const qreal targetY = currentItemTop + height;
 404
 405             updateKeyboardAnchor();
 406             int newIndex = nextRowIndex(index);
 407             do {
 408                 index = newIndex;
 409                 updateKeyboardAnchor();
 410                 newIndex = nextRowIndex(index);
 411             } while (m_view->itemRect(newIndex).bottomLeft().y() < targetY && newIndex != index);
 412         }
 413         break;
 414
 415     case Qt::Key_Enter:
 416     case Qt::Key_Return: {
 417         const KItemSet selectedItems = m_selectionManager->selectedItems();
 418         if (selectedItems.count() >= 2) {
 419             Q_EMIT itemsActivated(selectedItems);
 420         } else if (selectedItems.count() == 1) {
 421             Q_EMIT itemActivated(selectedItems.first());
 422         } else {
 423             Q_EMIT itemActivated(index);
 424         }
 425         break;
 426     }
 427
 428     case Qt::Key_Menu: {
 429         // Emit the signal itemContextMenuRequested() in case if at least one
 430         // item is selected. Otherwise the signal viewContextMenuRequested() will be emitted.
 431         const KItemSet selectedItems = m_selectionManager->selectedItems();
 432         int index = -1;
 433         if (selectedItems.count() >= 2) {
 434             const int currentItemIndex = m_selectionManager->currentItem();
 435             index = selectedItems.contains(currentItemIndex) ? currentItemIndex : selectedItems.first();
 436         } else if (selectedItems.count() == 1) {
 437             index = selectedItems.first();
 438         }
 439
 440         if (index >= 0) {
 441             const QRectF contextRect = m_view->itemContextRect(index);
 442             const QPointF pos(m_view->scene()->views().first()->mapToGlobal(contextRect.bottomRight().toPoint()));
 443             Q_EMIT itemContextMenuRequested(index, pos);
 444         } else {
 445             Q_EMIT viewContextMenuRequested(QCursor::pos());
 446         }
 447         break;
 448     }
 449
 450     case Qt::Key_Escape:
 451         if (m_selectionMode) {
 452             Q_EMIT selectionModeChangeRequested(false);
 453         } else if (m_selectionBehavior != SingleSelection) {
 454             m_selectionManager->clearSelection();
 455         }
 456         m_keyboardManager->cancelSearch();
 457         Q_EMIT escapePressed();
 458         break;
 459
 460     case Qt::Key_Space:
 461         if (m_selectionBehavior == MultiSelection) {
 462             if (controlPressed) {
 463                 // Toggle the selection state of the current item.
 464                 m_selectionManager->endAnchoredSelection();
 465                 m_selectionManager->setSelected(index, 1, KItemListSelectionManager::Toggle);
 466                 m_selectionManager->beginAnchoredSelection(index);
 467                 break;
 468             } else {
 469                 // Select the current item if it is not selected yet.
 470                 const int current = m_selectionManager->currentItem();
 471                 if (!m_selectionManager->isSelected(current)) {
 472                     m_selectionManager->setSelected(current);
 473                     break;
 474                 }
 475             }
 476         }
 477         Q_FALLTHROUGH(); // fall through to the default case and add the Space to the current search string.
 478     default:
 479         m_keyboardManager->addKeys(event->text());
 480         // Make sure unconsumed events get propagated up the chain. #302329
 481         event->ignore();
 482         return false;
 483     }
 484
 485     if (m_selectionManager->currentItem() != index) {
 486         switch (m_selectionBehavior) {
 487         case NoSelection:
 488             m_selectionManager->setCurrentItem(index);
 489             break;
 490
 491         case SingleSelection:
 492             m_selectionManager->setCurrentItem(index);
 493             m_selectionManager->clearSelection();
 494             m_selectionManager->setSelected(index, 1);
 495             break;
 496
 497         case MultiSelection:
 498             if (controlPressed) {
 499                 m_selectionManager->endAnchoredSelection();
 500             }
 501
 502             m_selectionManager->setCurrentItem(index);
 503
 504             if (!shiftOrControlPressed) {
 505                 m_selectionManager->clearSelection();
 506                 m_selectionManager->setSelected(index, 1);
 507             }
 508
 509             if (!shiftPressed) {
 510                 m_selectionManager->beginAnchoredSelection(index);
 511             }
 512             break;
 513         }
 514     }
 515
 516     if (navigationPressed) {
 517         m_view->scrollToItem(index);
 518     }
 519     return true;
 520 }
 521
 522 void KItemListController::slotChangeCurrentItem(const QString &text, bool searchFromNextItem)
 523 {
 524     if (!m_model || m_model->count() == 0) {
 525         return;
 526     }
 527     int index;
 528     if (searchFromNextItem) {
 529         const int currentIndex = m_selectionManager->currentItem();
 530         index = m_model->indexForKeyboardSearch(text, (currentIndex + 1) % m_model->count());
 531     } else {
 532         index = m_model->indexForKeyboardSearch(text, 0);
 533     }
 534     if (index >= 0) {
 535         m_selectionManager->setCurrentItem(index);
 536
 537         if (m_selectionBehavior != NoSelection) {
 538             m_selectionManager->replaceSelection(index);
 539             m_selectionManager->beginAnchoredSelection(index);
 540         }
 541
 542         m_view->scrollToItem(index);
 543     }
 544 }
 545
 546 void KItemListController::slotAutoActivationTimeout()
 547 {
 548     if (!m_model || !m_view) {
 549         return;
 550     }
 551
 552     const int index = m_autoActivationTimer->property("index").toInt();
 553     if (index < 0 || index >= m_model->count()) {
 554         return;
 555     }
 556
 557     /* m_view->isUnderMouse() fixes a bug in the Folder-View-Panel and in the
 558      * Places-Panel.
 559      *
 560      * Bug: When you drag a file onto a Folder-View-Item or a Places-Item and
 561      * then move away before the auto-activation timeout triggers, than the
 562      * item still becomes activated/expanded.
 563      *
 564      * See Bug 293200 and 305783
 565      */
 566     if (m_view->isUnderMouse()) {
 567         if (m_view->supportsItemExpanding() && m_model->isExpandable(index)) {
 568             const bool expanded = m_model->isExpanded(index);
 569             m_model->setExpanded(index, !expanded);
 570         } else if (m_autoActivationBehavior != ExpansionOnly) {
 571             Q_EMIT itemActivated(index);
 572         }
 573     }
 574 }
 575
 576 bool KItemListController::inputMethodEvent(QInputMethodEvent *event)
 577 {
 578     Q_UNUSED(event)
 579     return false;
 580 }
 581
 582 bool KItemListController::mousePressEvent(QGraphicsSceneMouseEvent *event, const QTransform &transform)
 583 {
 584     m_mousePress = true;
 585     m_pressedMouseGlobalPos = event->screenPos();
 586
 587     if (event->source() == Qt::MouseEventSynthesizedByQt && m_isTouchEvent) {
 588         return false;
 589     }
 590
 591     if (!m_view) {
 592         return false;
 593     }
 594
 595     const QPointF pressedMousePos = transform.map(event->pos());
 596     m_pressedIndex = m_view->itemAt(pressedMousePos);
 597
 598     const Qt::MouseButtons buttons = event->buttons();
 599
 600     if (!onPress(event->screenPos(), event->pos(), event->modifiers(), buttons)) {
 601         startRubberBand();
 602         return false;
 603     }
 604
 605     return true;
 606 }
 607
 608 bool KItemListController::mouseMoveEvent(QGraphicsSceneMouseEvent *event, const QTransform &transform)
 609 {
 610     if (!m_view) {
 611         return false;
 612     }
 613
 614     if (m_view->m_tapAndHoldIndicator->isActive()) {
 615         m_view->m_tapAndHoldIndicator->setActive(false);
 616     }
 617
 618     if (event->source() == Qt::MouseEventSynthesizedByQt && !m_dragActionOrRightClick && m_isTouchEvent) {
 619         return false;
 620     }
 621
 622     if (m_pressedIndex.has_value() && !m_view->rubberBand()->isActive()) {
 623         // Check whether a dragging should be started
 624         if (event->buttons() & Qt::LeftButton) {
 625             const auto distance = (event->screenPos() - m_pressedMouseGlobalPos).manhattanLength();
 626             if (distance >= QApplication::startDragDistance()) {
 627                 if (!m_selectionManager->isSelected(m_pressedIndex.value())) {
 628                     // Always assure that the dragged item gets selected. Usually this is already
 629                     // done on the mouse-press event, but when using the selection-toggle on a
 630                     // selected item the dragged item is not selected yet.
 631                     m_selectionManager->setSelected(m_pressedIndex.value(), 1, KItemListSelectionManager::Toggle);
 632                 } else {
 633                     // A selected item has been clicked to drag all selected items
 634                     // -> the selection should not be cleared when the mouse button is released.
 635                     m_clearSelectionIfItemsAreNotDragged = false;
 636                 }
 637                 startDragging();
 638                 m_mousePress = false;
 639             }
 640         }
 641     } else {
 642         KItemListRubberBand *rubberBand = m_view->rubberBand();
 643         if (rubberBand->isActive()) {
 644             QPointF endPos = transform.map(event->pos());
 645
 646             // Update the current item.
 647             const std::optional<int> newCurrent = m_view->itemAt(endPos);
 648             if (newCurrent.has_value()) {
 649                 // It's expected that the new current index is also the new anchor (bug 163451).
 650                 m_selectionManager->endAnchoredSelection();
 651                 m_selectionManager->setCurrentItem(newCurrent.value());
 652                 m_selectionManager->beginAnchoredSelection(newCurrent.value());
 653             }
 654
 655             if (m_view->scrollOrientation() == Qt::Vertical) {
 656                 endPos.ry() += m_view->scrollOffset();
 657                 if (m_view->itemSize().width() < 0) {
 658                     // Use a special rubberband for views that have only one column and
 659                     // expand the rubberband to use the whole width of the view.
 660                     endPos.setX(m_view->size().width());
 661                 }
 662             } else {
 663                 endPos.rx() += m_view->scrollOffset();
 664             }
 665             rubberBand->setEndPosition(endPos);
 666         }
 667     }
 668
 669     return false;
 670 }
 671
 672 bool KItemListController::mouseReleaseEvent(QGraphicsSceneMouseEvent *event, const QTransform &transform)
 673 {
 674     m_mousePress = false;
 675     m_isTouchEvent = false;
 676
 677     if (!m_view) {
 678         return false;
 679     }
 680
 681     if (m_view->m_tapAndHoldIndicator->isActive()) {
 682         m_view->m_tapAndHoldIndicator->setActive(false);
 683     }
 684
 685     KItemListRubberBand *rubberBand = m_view->rubberBand();
 686     if (event->source() == Qt::MouseEventSynthesizedByQt && !rubberBand->isActive() && m_isTouchEvent) {
 687         return false;
 688     }
 689
 690     Q_EMIT mouseButtonReleased(m_pressedIndex.value_or(-1), event->buttons());
 691
 692     return onRelease(transform.map(event->pos()), event->modifiers(), event->button(), false);
 693 }
 694
 695 bool KItemListController::mouseDoubleClickEvent(QGraphicsSceneMouseEvent *event, const QTransform &transform)
 696 {
 697     const QPointF pos = transform.map(event->pos());
 698     const std::optional<int> index = m_view->itemAt(pos);
 699
 700     // Expand item if desired - See Bug 295573
 701     if (m_mouseDoubleClickAction != ActivateItemOnly) {
 702         if (m_view && m_model && m_view->supportsItemExpanding() && m_model->isExpandable(index.value_or(-1))) {
 703             const bool expanded = m_model->isExpanded(index.value());
 704             m_model->setExpanded(index.value(), !expanded);
 705         }
 706     }
 707
 708     if (event->button() & Qt::RightButton) {
 709         m_selectionManager->clearSelection();
 710         if (index.has_value()) {
 711             m_selectionManager->setSelected(index.value());
 712             Q_EMIT itemContextMenuRequested(index.value(), event->screenPos());
 713         } else {
 714             const QRectF headerBounds = m_view->headerBoundaries();
 715             if (headerBounds.contains(event->pos())) {
 716                 Q_EMIT headerContextMenuRequested(event->screenPos());
 717             } else {
 718                 Q_EMIT viewContextMenuRequested(event->screenPos());
 719             }
 720         }
 721         return true;
 722     }
 723
 724     bool emitItemActivated = !(m_view->style()->styleHint(QStyle::SH_ItemView_ActivateItemOnSingleClick) || m_singleClickActivationEnforced)
 725         && (event->button() & Qt::LeftButton) && index.has_value() && index.value() < m_model->count();
 726     if (emitItemActivated) {
 727         Q_EMIT itemActivated(index.value());
 728     }
 729     return false;
 730 }
 731
 732 bool KItemListController::dragEnterEvent(QGraphicsSceneDragDropEvent *event, const QTransform &transform)
 733 {
 734     Q_UNUSED(event)
 735     Q_UNUSED(transform)
 736
 737     DragAndDropHelper::clearUrlListMatchesUrlCache();
 738
 739     return false;
 740 }
 741
 742 bool KItemListController::dragLeaveEvent(QGraphicsSceneDragDropEvent *event, const QTransform &transform)
 743 {
 744     Q_UNUSED(event)
 745     Q_UNUSED(transform)
 746
 747     m_autoActivationTimer->stop();
 748     m_view->setAutoScroll(false);
 749     m_view->hideDropIndicator();
 750
 751     KItemListWidget *widget = hoveredWidget();
 752     if (widget) {
 753         widget->setHovered(false);
 754         Q_EMIT itemUnhovered(widget->index());
 755     }
 756     return false;
 757 }
 758
 759 bool KItemListController::dragMoveEvent(QGraphicsSceneDragDropEvent *event, const QTransform &transform)
 760 {
 761     if (!m_model || !m_view) {
 762         return false;
 763     }
 764
 765     QUrl hoveredDir = m_model->directory();
 766     KItemListWidget *oldHoveredWidget = hoveredWidget();
 767
 768     const QPointF pos = transform.map(event->pos());
 769     KItemListWidget *newHoveredWidget = widgetForDropPos(pos);
 770     int index = -1;
 771
 772     if (oldHoveredWidget != newHoveredWidget) {
 773         m_autoActivationTimer->stop();
 774
 775         if (oldHoveredWidget) {
 776             oldHoveredWidget->setHovered(false);
 777             Q_EMIT itemUnhovered(oldHoveredWidget->index());
 778         }
 779     }
 780
 781     if (newHoveredWidget) {
 782         bool droppingBetweenItems = false;
 783         if (m_model->sortRole().isEmpty()) {
 784             // The model supports inserting items between other items.
 785             droppingBetweenItems = (m_view->showDropIndicator(pos) >= 0);
 786         }
 787
 788         index = newHoveredWidget->index();
 789
 790         if (m_model->isDir(index)) {
 791             hoveredDir = m_model->url(index);
 792         }
 793
 794         if (!droppingBetweenItems) {
 795             // Something has been dragged on an item.
 796             m_view->hideDropIndicator();
 797             if (!newHoveredWidget->isHovered()) {
 798                 newHoveredWidget->setHovered(true);
 799                 Q_EMIT itemHovered(index);
 800             }
 801
 802             if (!m_autoActivationTimer->isActive() && m_autoActivationTimer->interval() >= 0) {
 803                 m_autoActivationTimer->setProperty("index", index);
 804                 m_autoActivationTimer->start();
 805             }
 806         } else {
 807             m_autoActivationTimer->stop();
 808             if (newHoveredWidget && newHoveredWidget->isHovered()) {
 809                 newHoveredWidget->setHovered(false);
 810                 Q_EMIT itemUnhovered(index);
 811             }
 812         }
 813     } else {
 814         m_view->hideDropIndicator();
 815     }
 816
 817     if (DragAndDropHelper::urlListMatchesUrl(event->mimeData()->urls(), hoveredDir)) {
 818         event->setDropAction(Qt::IgnoreAction);
 819         event->ignore();
 820     } else {
 821         if (m_model->supportsDropping(index)) {
 822             event->setDropAction(event->proposedAction());
 823             event->accept();
 824         } else {
 825             event->setDropAction(Qt::IgnoreAction);
 826             event->ignore();
 827         }
 828     }
 829     return false;
 830 }
 831
 832 bool KItemListController::dropEvent(QGraphicsSceneDragDropEvent *event, const QTransform &transform)
 833 {
 834     if (!m_view) {
 835         return false;
 836     }
 837
 838     m_autoActivationTimer->stop();
 839     m_view->setAutoScroll(false);
 840
 841     const QPointF pos = transform.map(event->pos());
 842
 843     int dropAboveIndex = -1;
 844     if (m_model->sortRole().isEmpty()) {
 845         // The model supports inserting of items between other items.
 846         dropAboveIndex = m_view->showDropIndicator(pos);
 847     }
 848
 849     if (dropAboveIndex >= 0) {
 850         // Something has been dropped between two items.
 851         m_view->hideDropIndicator();
 852         Q_EMIT aboveItemDropEvent(dropAboveIndex, event);
 853     } else if (!event->mimeData()->hasFormat(m_model->blacklistItemDropEventMimeType())) {
 854         // Something has been dropped on an item or on an empty part of the view.
 855         const KItemListWidget *receivingWidget = widgetForDropPos(pos);
 856         if (receivingWidget) {
 857             Q_EMIT itemDropEvent(receivingWidget->index(), event);
 858         } else {
 859             Q_EMIT itemDropEvent(-1, event);
 860         }
 861     }
 862
 863     QAccessibleEvent accessibilityEvent(view(), QAccessible::DragDropEnd);
 864     QAccessible::updateAccessibility(&accessibilityEvent);
 865
 866     return true;
 867 }
 868
 869 bool KItemListController::hoverEnterEvent(QGraphicsSceneHoverEvent *event, const QTransform &transform)
 870 {
 871     Q_UNUSED(event)
 872     Q_UNUSED(transform)
 873     return false;
 874 }
 875
 876 bool KItemListController::hoverMoveEvent(QGraphicsSceneHoverEvent *event, const QTransform &transform)
 877 {
 878     Q_UNUSED(transform)
 879     if (!m_model || !m_view) {
 880         return false;
 881     }
 882
 883     // We identify the widget whose expansionArea had been hovered before this hoverMoveEvent() triggered.
 884     // we can't use hoveredWidget() here (it handles the icon+text rect, not the expansion rect)
 885     // like hoveredWidget(), we find the hovered widget for the expansion rect
 886     const auto visibleItemListWidgets = m_view->visibleItemListWidgets();
 887     const auto oldHoveredExpansionWidgetIterator = std::find_if(visibleItemListWidgets.begin(), visibleItemListWidgets.end(), [](auto &widget) {
 888         return widget->expansionAreaHovered();
 889     });
 890     const auto oldHoveredExpansionWidget =
 891         oldHoveredExpansionWidgetIterator == visibleItemListWidgets.end() ? std::nullopt : std::make_optional(*oldHoveredExpansionWidgetIterator);
 892
 893     const auto unhoverOldHoveredWidget = [&]() {
 894         if (auto oldHoveredWidget = hoveredWidget(); oldHoveredWidget) {
 895             // handle the text+icon one
 896             oldHoveredWidget->setHovered(false);
 897             Q_EMIT itemUnhovered(oldHoveredWidget->index());
 898         }
 899     };
 900
 901     const auto unhoverOldExpansionWidget = [&]() {
 902         if (oldHoveredExpansionWidget) {
 903             // then the expansion toggle
 904             (*oldHoveredExpansionWidget)->setExpansionAreaHovered(false);
 905         }
 906     };
 907
 908     const QPointF pos = transform.map(event->pos());
 909     if (KItemListWidget *newHoveredWidget = widgetForPos(pos); newHoveredWidget) {
 910         // something got hovered, work out which part and set hover for the appropriate widget
 911         const auto mappedPos = newHoveredWidget->mapFromItem(m_view, pos);
 912         const bool isOnExpansionToggle = newHoveredWidget->expansionToggleRect().contains(mappedPos);
 913
 914         if (isOnExpansionToggle) {
 915             // make sure we unhover the old one first if old!=new
 916             if (oldHoveredExpansionWidget && *oldHoveredExpansionWidget != newHoveredWidget) {
 917                 (*oldHoveredExpansionWidget)->setExpansionAreaHovered(false);
 918             }
 919             // we also unhover any old icon+text hovers, in case the mouse movement from icon+text to expansion toggle is too fast (i.e. newHoveredWidget is never null between the transition)
 920             unhoverOldHoveredWidget();
 921
 922             newHoveredWidget->setExpansionAreaHovered(true);
 923         } else {
 924             // make sure we unhover the old one first if old!=new
 925             auto oldHoveredWidget = hoveredWidget();
 926             if (oldHoveredWidget && oldHoveredWidget != newHoveredWidget) {
 927                 oldHoveredWidget->setHovered(false);
 928                 Q_EMIT itemUnhovered(oldHoveredWidget->index());
 929             }
 930             // we also unhover any old expansion toggle hovers, in case the mouse movement from expansion toggle to icon+text is too fast (i.e. newHoveredWidget is never null between the transition)
 931             unhoverOldExpansionWidget();
 932
 933             const bool isOverIconAndText = newHoveredWidget->iconRect().contains(mappedPos) || newHoveredWidget->textRect().contains(mappedPos);
 934             const bool hasMultipleSelection = m_selectionManager->selectedItems().count() > 1;
 935
 936             if (hasMultipleSelection && !isOverIconAndText) {
 937                 // In case we have multiple selections, clicking on any row will deselect the selection.
 938                 // So, as a visual cue for signalling that clicking anywhere won't select, but clear current highlights,
 939                 // we disable hover of the *row*(i.e. blank space to the right of the icon+text)
 940
 941                 // (no-op in this branch for masked hover)
 942             } else {
 943                 newHoveredWidget->setHoverPosition(mappedPos);
 944                 if (oldHoveredWidget != newHoveredWidget) {
 945                     newHoveredWidget->setHovered(true);
 946                     Q_EMIT itemHovered(newHoveredWidget->index());
 947                 }
 948             }
 949         }
 950     } else {
 951         // unhover any currently hovered expansion and text+icon widgets
 952         unhoverOldHoveredWidget();
 953         unhoverOldExpansionWidget();
 954     }
 955     return false;
 956 }
 957
 958 bool KItemListController::hoverLeaveEvent(QGraphicsSceneHoverEvent *event, const QTransform &transform)
 959 {
 960     Q_UNUSED(event)
 961     Q_UNUSED(transform)
 962
 963     m_mousePress = false;
 964     m_isTouchEvent = false;
 965
 966     if (!m_model || !m_view) {
 967         return false;
 968     }
 969
 970     const auto widgets = m_view->visibleItemListWidgets();
 971     for (KItemListWidget *widget : widgets) {
 972         if (widget->isHovered()) {
 973             widget->setHovered(false);
 974             Q_EMIT itemUnhovered(widget->index());
 975         }
 976     }
 977     return false;
 978 }
 979
 980 bool KItemListController::wheelEvent(QGraphicsSceneWheelEvent *event, const QTransform &transform)
 981 {
 982     Q_UNUSED(event)
 983     Q_UNUSED(transform)
 984     return false;
 985 }
 986
 987 bool KItemListController::resizeEvent(QGraphicsSceneResizeEvent *event, const QTransform &transform)
 988 {
 989     Q_UNUSED(event)
 990     Q_UNUSED(transform)
 991     return false;
 992 }
 993
 994 bool KItemListController::gestureEvent(QGestureEvent *event, const QTransform &transform)
 995 {
 996     if (!m_view) {
 997         return false;
 998     }
 999
1000     //you can touch on different views at the same time, but only one QWidget gets a mousePressEvent
1001     //we use this to get the right QWidget
1002     //the only exception is a tap gesture with state GestureStarted, we need to reset some variable
1003     if (!m_mousePress) {
1004         if (QGesture *tap = event->gesture(Qt::TapGesture)) {
1005             QTapGesture *tapGesture = static_cast<QTapGesture *>(tap);
1006             if (tapGesture->state() == Qt::GestureStarted) {
1007                 tapTriggered(tapGesture, transform);
1008             }
1009         }
1010         return false;
1011     }
1012
1013     bool accepted = false;
1014
1015     if (QGesture *tap = event->gesture(Qt::TapGesture)) {
1016         tapTriggered(static_cast<QTapGesture *>(tap), transform);
1017         accepted = true;
1018     }
1019     if (event->gesture(Qt::TapAndHoldGesture)) {
1020         tapAndHoldTriggered(event, transform);
1021         accepted = true;
1022     }
1023     if (event->gesture(Qt::PinchGesture)) {
1024         pinchTriggered(event, transform);
1025         accepted = true;
1026     }
1027     if (event->gesture(m_swipeGesture)) {
1028         swipeTriggered(event, transform);
1029         accepted = true;
1030     }
1031     if (event->gesture(m_twoFingerTapGesture)) {
1032         twoFingerTapTriggered(event, transform);
1033         accepted = true;
1034     }
1035     return accepted;
1036 }
1037
1038 bool KItemListController::touchBeginEvent(QTouchEvent *event, const QTransform &transform)
1039 {
1040     Q_UNUSED(event)
1041     Q_UNUSED(transform)
1042
1043     m_isTouchEvent = true;
1044     return false;
1045 }
1046
1047 void KItemListController::tapTriggered(QTapGesture *tap, const QTransform &transform)
1048 {
1049     static bool scrollerWasActive = false;
1050
1051     if (tap->state() == Qt::GestureStarted) {
1052         m_dragActionOrRightClick = false;
1053         m_isSwipeGesture = false;
1054         m_pinchGestureInProgress = false;
1055         scrollerWasActive = m_scrollerIsScrolling;
1056     }
1057
1058     if (tap->state() == Qt::GestureFinished) {
1059         m_mousePress = false;
1060
1061         //if at the moment of the gesture start the QScroller was active, the user made the tap
1062         //to stop the QScroller and not to tap on an item
1063         if (scrollerWasActive) {
1064             return;
1065         }
1066
1067         if (m_view->m_tapAndHoldIndicator->isActive()) {
1068             m_view->m_tapAndHoldIndicator->setActive(false);
1069         }
1070
1071         const QPointF pressedMousePos = transform.map(tap->position());
1072         m_pressedIndex = m_view->itemAt(pressedMousePos);
1073         if (m_dragActionOrRightClick) {
1074             m_dragActionOrRightClick = false;
1075         } else {
1076             onPress(m_pressedMouseGlobalPos.toPoint(), tap->position().toPoint(), Qt::NoModifier, Qt::LeftButton);
1077             onRelease(transform.map(tap->position()), Qt::NoModifier, Qt::LeftButton, true);
1078         }
1079         m_isTouchEvent = false;
1080     }
1081 }
1082
1083 void KItemListController::tapAndHoldTriggered(QGestureEvent *event, const QTransform &transform)
1084 {
1085     //the Qt TabAndHold gesture is triggerable with a mouse click, we don't want this
1086     if (!m_isTouchEvent) {
1087         return;
1088     }
1089
1090     const QTapAndHoldGesture *tap = static_cast<QTapAndHoldGesture *>(event->gesture(Qt::TapAndHoldGesture));
1091     if (tap->state() == Qt::GestureFinished) {
1092         //if a pinch gesture is in progress we don't want a TabAndHold gesture
1093         if (m_pinchGestureInProgress) {
1094             return;
1095         }
1096         const QPointF pressedMousePos = transform.map(event->mapToGraphicsScene(tap->position()));
1097         m_pressedIndex = m_view->itemAt(pressedMousePos);
1098         if (m_pressedIndex.has_value() && !m_selectionManager->isSelected(m_pressedIndex.value())) {
1099             m_selectionManager->clearSelection();
1100             m_selectionManager->setSelected(m_pressedIndex.value());
1101             if (!m_selectionMode) {
1102                 Q_EMIT selectionModeChangeRequested(true);
1103             }
1104         } else if (!m_pressedIndex.has_value()) {
1105             m_selectionManager->clearSelection();
1106             startRubberBand();
1107         }
1108
1109         Q_EMIT scrollerStop();
1110
1111         m_view->m_tapAndHoldIndicator->setStartPosition(pressedMousePos);
1112         m_view->m_tapAndHoldIndicator->setActive(true);
1113
1114         m_dragActionOrRightClick = true;
1115     }
1116 }
1117
1118 void KItemListController::pinchTriggered(QGestureEvent *event, const QTransform &transform)
1119 {
1120     Q_UNUSED(transform)
1121
1122     const QPinchGesture *pinch = static_cast<QPinchGesture *>(event->gesture(Qt::PinchGesture));
1123     const qreal sensitivityModifier = 0.2;
1124     static qreal counter = 0;
1125
1126     if (pinch->state() == Qt::GestureStarted) {
1127         m_pinchGestureInProgress = true;
1128         counter = 0;
1129     }
1130     if (pinch->state() == Qt::GestureUpdated) {
1131         //if a swipe gesture was recognized or in progress, we don't want a pinch gesture to change the zoom
1132         if (m_isSwipeGesture) {
1133             return;
1134         }
1135         counter = counter + (pinch->scaleFactor() - 1);
1136         if (counter >= sensitivityModifier) {
1137             Q_EMIT increaseZoom();
1138             counter = 0;
1139         } else if (counter <= -sensitivityModifier) {
1140             Q_EMIT decreaseZoom();
1141             counter = 0;
1142         }
1143     }
1144 }
1145
1146 void KItemListController::swipeTriggered(QGestureEvent *event, const QTransform &transform)
1147 {
1148     Q_UNUSED(transform)
1149
1150     const KTwoFingerSwipe *swipe = static_cast<KTwoFingerSwipe *>(event->gesture(m_swipeGesture));
1151
1152     if (!swipe) {
1153         return;
1154     }
1155     if (swipe->state() == Qt::GestureStarted) {
1156         m_isSwipeGesture = true;
1157     }
1158
1159     if (swipe->state() == Qt::GestureCanceled) {
1160         m_isSwipeGesture = false;
1161     }
1162
1163     if (swipe->state() == Qt::GestureFinished) {
1164         Q_EMIT scrollerStop();
1165
1166         if (swipe->swipeAngle() <= 20 || swipe->swipeAngle() >= 340) {
1167             Q_EMIT mouseButtonPressed(m_pressedIndex.value_or(-1), Qt::BackButton);
1168         } else if (swipe->swipeAngle() <= 200 && swipe->swipeAngle() >= 160) {
1169             Q_EMIT mouseButtonPressed(m_pressedIndex.value_or(-1), Qt::ForwardButton);
1170         } else if (swipe->swipeAngle() <= 110 && swipe->swipeAngle() >= 60) {
1171             Q_EMIT swipeUp();
1172         }
1173         m_isSwipeGesture = true;
1174     }
1175 }
1176
1177 void KItemListController::twoFingerTapTriggered(QGestureEvent *event, const QTransform &transform)
1178 {
1179     const KTwoFingerTap *twoTap = static_cast<KTwoFingerTap *>(event->gesture(m_twoFingerTapGesture));
1180
1181     if (!twoTap) {
1182         return;
1183     }
1184
1185     if (twoTap->state() == Qt::GestureStarted) {
1186         const QPointF pressedMousePos = transform.map(twoTap->pos());
1187         m_pressedIndex = m_view->itemAt(pressedMousePos);
1188         if (m_pressedIndex.has_value()) {
1189             onPress(twoTap->screenPos().toPoint(), twoTap->pos().toPoint(), Qt::ControlModifier, Qt::LeftButton);
1190             onRelease(transform.map(twoTap->pos()), Qt::ControlModifier, Qt::LeftButton, false);
1191         }
1192     }
1193 }
1194
1195 bool KItemListController::processEvent(QEvent *event, const QTransform &transform)
1196 {
1197     if (!event) {
1198         return false;
1199     }
1200
1201     switch (event->type()) {
1202     case QEvent::KeyPress:
1203         return keyPressEvent(static_cast<QKeyEvent *>(event));
1204     case QEvent::InputMethod:
1205         return inputMethodEvent(static_cast<QInputMethodEvent *>(event));
1206     case QEvent::GraphicsSceneMousePress:
1207         return mousePressEvent(static_cast<QGraphicsSceneMouseEvent *>(event), QTransform());
1208     case QEvent::GraphicsSceneMouseMove:
1209         return mouseMoveEvent(static_cast<QGraphicsSceneMouseEvent *>(event), QTransform());
1210     case QEvent::GraphicsSceneMouseRelease:
1211         return mouseReleaseEvent(static_cast<QGraphicsSceneMouseEvent *>(event), QTransform());
1212     case QEvent::GraphicsSceneMouseDoubleClick:
1213         return mouseDoubleClickEvent(static_cast<QGraphicsSceneMouseEvent *>(event), QTransform());
1214     case QEvent::GraphicsSceneWheel:
1215         return wheelEvent(static_cast<QGraphicsSceneWheelEvent *>(event), QTransform());
1216     case QEvent::GraphicsSceneDragEnter:
1217         return dragEnterEvent(static_cast<QGraphicsSceneDragDropEvent *>(event), QTransform());
1218     case QEvent::GraphicsSceneDragLeave:
1219         return dragLeaveEvent(static_cast<QGraphicsSceneDragDropEvent *>(event), QTransform());
1220     case QEvent::GraphicsSceneDragMove:
1221         return dragMoveEvent(static_cast<QGraphicsSceneDragDropEvent *>(event), QTransform());
1222     case QEvent::GraphicsSceneDrop:
1223         return dropEvent(static_cast<QGraphicsSceneDragDropEvent *>(event), QTransform());
1224     case QEvent::GraphicsSceneHoverEnter:
1225         return hoverEnterEvent(static_cast<QGraphicsSceneHoverEvent *>(event), QTransform());
1226     case QEvent::GraphicsSceneHoverMove:
1227         return hoverMoveEvent(static_cast<QGraphicsSceneHoverEvent *>(event), QTransform());
1228     case QEvent::GraphicsSceneHoverLeave:
1229         return hoverLeaveEvent(static_cast<QGraphicsSceneHoverEvent *>(event), QTransform());
1230     case QEvent::GraphicsSceneResize:
1231         return resizeEvent(static_cast<QGraphicsSceneResizeEvent *>(event), transform);
1232     case QEvent::Gesture:
1233         return gestureEvent(static_cast<QGestureEvent *>(event), transform);
1234     case QEvent::TouchBegin:
1235         return touchBeginEvent(static_cast<QTouchEvent *>(event), transform);
1236     default:
1237         break;
1238     }
1239
1240     return false;
1241 }
1242
1243 void KItemListController::slotViewScrollOffsetChanged(qreal current, qreal previous)
1244 {
1245     if (!m_view) {
1246         return;
1247     }
1248
1249     KItemListRubberBand *rubberBand = m_view->rubberBand();
1250     if (rubberBand->isActive()) {
1251         const qreal diff = current - previous;
1252         // TODO: Ideally just QCursor::pos() should be used as
1253         // new end-position but it seems there is no easy way
1254         // to have something like QWidget::mapFromGlobal() for QGraphicsWidget
1255         // (... or I just missed an easy way to do the mapping)
1256         QPointF endPos = rubberBand->endPosition();
1257         if (m_view->scrollOrientation() == Qt::Vertical) {
1258             endPos.ry() += diff;
1259         } else {
1260             endPos.rx() += diff;
1261         }
1262
1263         rubberBand->setEndPosition(endPos);
1264     }
1265 }
1266
1267 void KItemListController::slotRubberBandChanged()
1268 {
1269     if (!m_view || !m_model || m_model->count() <= 0) {
1270         return;
1271     }
1272
1273     const KItemListRubberBand *rubberBand = m_view->rubberBand();
1274     const QPointF startPos = rubberBand->startPosition();
1275     const QPointF endPos = rubberBand->endPosition();
1276     QRectF rubberBandRect = QRectF(startPos, endPos).normalized();
1277
1278     const bool scrollVertical = (m_view->scrollOrientation() == Qt::Vertical);
1279     if (scrollVertical) {
1280         rubberBandRect.translate(0, -m_view->scrollOffset());
1281     } else {
1282         rubberBandRect.translate(-m_view->scrollOffset(), 0);
1283     }
1284
1285     if (!m_oldSelection.isEmpty()) {
1286         // Clear the old selection that was available before the rubberband has
1287         // been activated in case if no Shift- or Control-key are pressed
1288         const bool shiftOrControlPressed = QApplication::keyboardModifiers() & Qt::ShiftModifier || QApplication::keyboardModifiers() & Qt::ControlModifier;
1289         if (!shiftOrControlPressed && !m_selectionMode) {
1290             m_oldSelection.clear();
1291         }
1292     }
1293
1294     KItemSet selectedItems;
1295
1296     // Select all visible items that intersect with the rubberband
1297     const auto widgets = m_view->visibleItemListWidgets();
1298     for (const KItemListWidget *widget : widgets) {
1299         const int index = widget->index();
1300
1301         const QRectF widgetRect = m_view->itemRect(index);
1302         if (widgetRect.intersects(rubberBandRect)) {
1303             const QRectF iconRect = widget->iconRect().translated(widgetRect.topLeft());
1304             const QRectF textRect = widget->textRect().translated(widgetRect.topLeft());
1305             if (iconRect.intersects(rubberBandRect) || textRect.intersects(rubberBandRect)) {
1306                 selectedItems.insert(index);
1307             }
1308         }
1309     }
1310
1311     // Select all invisible items that intersect with the rubberband. Instead of
1312     // iterating all items only the area which might be touched by the rubberband
1313     // will be checked.
1314     const bool increaseIndex = scrollVertical ? startPos.y() > endPos.y() : startPos.x() > endPos.x();
1315
1316     int index = increaseIndex ? m_view->lastVisibleIndex() + 1 : m_view->firstVisibleIndex() - 1;
1317     bool selectionFinished = false;
1318     do {
1319         const QRectF widgetRect = m_view->itemRect(index);
1320         if (widgetRect.intersects(rubberBandRect)) {
1321             selectedItems.insert(index);
1322         }
1323
1324         if (increaseIndex) {
1325             ++index;
1326             selectionFinished = (index >= m_model->count()) || (scrollVertical && widgetRect.top() > rubberBandRect.bottom())
1327                 || (!scrollVertical && widgetRect.left() > rubberBandRect.right());
1328         } else {
1329             --index;
1330             selectionFinished = (index < 0) || (scrollVertical && widgetRect.bottom() < rubberBandRect.top())
1331                 || (!scrollVertical && widgetRect.right() < rubberBandRect.left());
1332         }
1333     } while (!selectionFinished);
1334
1335     if ((QApplication::keyboardModifiers() & Qt::ControlModifier) || m_selectionMode) {
1336         // If Control is pressed, the selection state of all items in the rubberband is toggled.
1337         // Therefore, the new selection contains:
1338         // 1. All previously selected items which are not inside the rubberband, and
1339         // 2. all items inside the rubberband which have not been selected previously.
1340         m_selectionManager->setSelectedItems(m_oldSelection ^ selectedItems);
1341     } else {
1342         m_selectionManager->setSelectedItems(selectedItems + m_oldSelection);
1343     }
1344 }
1345
1346 void KItemListController::startDragging()
1347 {
1348     if (!m_view || !m_model) {
1349         return;
1350     }
1351
1352     const KItemSet selectedItems = m_selectionManager->selectedItems();
1353     if (selectedItems.isEmpty()) {
1354         return;
1355     }
1356
1357     QMimeData *data = m_model->createMimeData(selectedItems);
1358     if (!data) {
1359         return;
1360     }
1361     KUrlMimeData::exportUrlsToPortal(data);
1362
1363     // The created drag object will be owned and deleted
1364     // by QApplication::activeWindow().
1365     QDrag *drag = new QDrag(QApplication::activeWindow());
1366     drag->setMimeData(data);
1367
1368     const QPixmap pixmap = m_view->createDragPixmap(selectedItems);
1369     drag->setPixmap(pixmap);
1370
1371     const QPoint hotSpot((pixmap.width() / pixmap.devicePixelRatio()) / 2, 0);
1372     drag->setHotSpot(hotSpot);
1373
1374     drag->exec(Qt::MoveAction | Qt::CopyAction | Qt::LinkAction, Qt::CopyAction);
1375
1376     QAccessibleEvent accessibilityEvent(view(), QAccessible::DragDropStart);
1377     QAccessible::updateAccessibility(&accessibilityEvent);
1378 }
1379
1380 KItemListWidget *KItemListController::hoveredWidget() const
1381 {
1382     Q_ASSERT(m_view);
1383
1384     const auto widgets = m_view->visibleItemListWidgets();
1385     for (KItemListWidget *widget : widgets) {
1386         if (widget->isHovered()) {
1387             return widget;
1388         }
1389     }
1390
1391     return nullptr;
1392 }
1393
1394 KItemListWidget *KItemListController::widgetForPos(const QPointF &pos) const
1395 {
1396     Q_ASSERT(m_view);
1397
1398     const auto widgets = m_view->visibleItemListWidgets();
1399     for (KItemListWidget *widget : widgets) {
1400         const QPointF mappedPos = widget->mapFromItem(m_view, pos);
1401         if (widget->contains(mappedPos) || widget->selectionRect().contains(mappedPos)) {
1402             return widget;
1403         }
1404     }
1405
1406     return nullptr;
1407 }
1408
1409 KItemListWidget *KItemListController::widgetForDropPos(const QPointF &pos) const
1410 {
1411     Q_ASSERT(m_view);
1412
1413     const auto widgets = m_view->visibleItemListWidgets();
1414     for (KItemListWidget *widget : widgets) {
1415         const QPointF mappedPos = widget->mapFromItem(m_view, pos);
1416         if (widget->contains(mappedPos)) {
1417             return widget;
1418         }
1419     }
1420
1421     return nullptr;
1422 }
1423
1424 void KItemListController::updateKeyboardAnchor()
1425 {
1426     const bool validAnchor =
1427         m_keyboardAnchorIndex >= 0 && m_keyboardAnchorIndex < m_model->count() && keyboardAnchorPos(m_keyboardAnchorIndex) == m_keyboardAnchorPos;
1428     if (!validAnchor) {
1429         const int index = m_selectionManager->currentItem();
1430         m_keyboardAnchorIndex = index;
1431         m_keyboardAnchorPos = keyboardAnchorPos(index);
1432     }
1433 }
1434
1435 int KItemListController::nextRowIndex(int index) const
1436 {
1437     if (m_keyboardAnchorIndex < 0) {
1438         return index;
1439     }
1440
1441     const int maxIndex = m_model->count() - 1;
1442     if (index == maxIndex) {
1443         return index;
1444     }
1445
1446     // Calculate the index of the last column inside the row of the current index
1447     int lastColumnIndex = index;
1448     while (keyboardAnchorPos(lastColumnIndex + 1) > keyboardAnchorPos(lastColumnIndex)) {
1449         ++lastColumnIndex;
1450         if (lastColumnIndex >= maxIndex) {
1451             return index;
1452         }
1453     }
1454
1455     // Based on the last column index go to the next row and calculate the nearest index
1456     // that is below the current index
1457     int nextRowIndex = lastColumnIndex + 1;
1458     int searchIndex = nextRowIndex;
1459     qreal minDiff = qAbs(m_keyboardAnchorPos - keyboardAnchorPos(nextRowIndex));
1460     while (searchIndex < maxIndex && keyboardAnchorPos(searchIndex + 1) > keyboardAnchorPos(searchIndex)) {
1461         ++searchIndex;
1462         const qreal searchDiff = qAbs(m_keyboardAnchorPos - keyboardAnchorPos(searchIndex));
1463         if (searchDiff < minDiff) {
1464             minDiff = searchDiff;
1465             nextRowIndex = searchIndex;
1466         }
1467     }
1468
1469     return nextRowIndex;
1470 }
1471
1472 int KItemListController::previousRowIndex(int index) const
1473 {
1474     if (m_keyboardAnchorIndex < 0 || index == 0) {
1475         return index;
1476     }
1477
1478     // Calculate the index of the first column inside the row of the current index
1479     int firstColumnIndex = index;
1480     while (keyboardAnchorPos(firstColumnIndex - 1) < keyboardAnchorPos(firstColumnIndex)) {
1481         --firstColumnIndex;
1482         if (firstColumnIndex <= 0) {
1483             return index;
1484         }
1485     }
1486
1487     // Based on the first column index go to the previous row and calculate the nearest index
1488     // that is above the current index
1489     int previousRowIndex = firstColumnIndex - 1;
1490     int searchIndex = previousRowIndex;
1491     qreal minDiff = qAbs(m_keyboardAnchorPos - keyboardAnchorPos(previousRowIndex));
1492     while (searchIndex > 0 && keyboardAnchorPos(searchIndex - 1) < keyboardAnchorPos(searchIndex)) {
1493         --searchIndex;
1494         const qreal searchDiff = qAbs(m_keyboardAnchorPos - keyboardAnchorPos(searchIndex));
1495         if (searchDiff < minDiff) {
1496             minDiff = searchDiff;
1497             previousRowIndex = searchIndex;
1498         }
1499     }
1500
1501     return previousRowIndex;
1502 }
1503
1504 qreal KItemListController::keyboardAnchorPos(int index) const
1505 {
1506     const QRectF itemRect = m_view->itemRect(index);
1507     if (!itemRect.isEmpty()) {
1508         return (m_view->scrollOrientation() == Qt::Vertical) ? itemRect.x() : itemRect.y();
1509     }
1510
1511     return 0;
1512 }
1513
1514 void KItemListController::updateExtendedSelectionRegion()
1515 {
1516     if (m_view) {
1517         const bool extend = (m_selectionBehavior != MultiSelection);
1518         KItemListStyleOption option = m_view->styleOption();
1519         if (option.extendedSelectionRegion != extend) {
1520             option.extendedSelectionRegion = extend;
1521             m_view->setStyleOption(option);
1522         }
1523     }
1524 }
1525
1526 bool KItemListController::onPress(const QPoint &screenPos, const QPointF &pos, const Qt::KeyboardModifiers modifiers, const Qt::MouseButtons buttons)
1527 {
1528     Q_EMIT mouseButtonPressed(m_pressedIndex.value_or(-1), buttons);
1529
1530     if (buttons & (Qt::BackButton | Qt::ForwardButton)) {
1531         // Do not select items when clicking the back/forward buttons, see
1532         // https://bugs.kde.org/show_bug.cgi?id=327412.
1533         return true;
1534     }
1535
1536     const QPointF pressedMousePos = m_view->transform().map(pos);
1537
1538     if (m_view->isAboveExpansionToggle(m_pressedIndex.value_or(-1), pressedMousePos)) {
1539         m_selectionManager->endAnchoredSelection();
1540         m_selectionManager->setCurrentItem(m_pressedIndex.value());
1541         m_selectionManager->beginAnchoredSelection(m_pressedIndex.value());
1542         return true;
1543     }
1544
1545     m_selectionTogglePressed = m_view->isAboveSelectionToggle(m_pressedIndex.value_or(-1), pressedMousePos);
1546     if (m_selectionTogglePressed) {
1547         m_selectionManager->setSelected(m_pressedIndex.value(), 1, KItemListSelectionManager::Toggle);
1548         // The previous anchored selection has been finished already in
1549         // KItemListSelectionManager::setSelected(). We can safely change
1550         // the current item and start a new anchored selection now.
1551         m_selectionManager->setCurrentItem(m_pressedIndex.value());
1552         m_selectionManager->beginAnchoredSelection(m_pressedIndex.value());
1553         return true;
1554     }
1555
1556     const bool shiftPressed = modifiers & Qt::ShiftModifier;
1557     const bool controlPressed = (modifiers & Qt::ControlModifier) || m_selectionMode; // Keeping selectionMode similar to pressing control will hopefully
1558                                                                                       // simplify the overall logic and possibilities both for users and devs.
1559     const bool leftClick = buttons & Qt::LeftButton;
1560     const bool rightClick = buttons & Qt::RightButton;
1561
1562     // The previous selection is cleared if either
1563     // 1. The selection mode is SingleSelection, or
1564     // 2. the selection mode is MultiSelection, and *none* of the following conditions are met:
1565     //    a) Shift or Control are pressed.
1566     //    b) The clicked item is selected already. In that case, the user might want to:
1567     //       - start dragging multiple items, or
1568     //       - open the context menu and perform an action for all selected items.
1569     const bool shiftOrControlPressed = shiftPressed || controlPressed;
1570     const bool pressedItemAlreadySelected = m_pressedIndex.has_value() && m_selectionManager->isSelected(m_pressedIndex.value());
1571     const bool clearSelection = m_selectionBehavior == SingleSelection || (!shiftOrControlPressed && !pressedItemAlreadySelected);
1572
1573     // When this method returns false, a rubberBand selection is created using KItemListController::startRubberBand via the caller.
1574     if (clearSelection) {
1575         const int selectedItemsCount = m_selectionManager->selectedItems().count();
1576         m_selectionManager->clearSelection();
1577         // clear and bail when we got an existing multi-selection
1578         if (selectedItemsCount > 1 && m_pressedIndex.has_value()) {
1579             const auto row = m_view->m_visibleItems.value(m_pressedIndex.value());
1580             const auto mappedPos = row->mapFromItem(m_view, pos);
1581             if (pressedItemAlreadySelected || row->iconRect().contains(mappedPos) || row->textRect().contains(mappedPos)) {
1582                 // we are indeed inside the text/icon rect, keep m_pressedIndex what it is
1583                 // and short-circuit for single-click activation (it will then propagate to onRelease and activate the item)
1584                 // or we just keep going for double-click activation
1585                 if (m_view->style()->styleHint(QStyle::SH_ItemView_ActivateItemOnSingleClick) || m_singleClickActivationEnforced) {
1586                     if (!pressedItemAlreadySelected) {
1587                         // An unselected item was clicked directly while deselecting multiple other items so we select it.
1588                         m_selectionManager->setSelected(m_pressedIndex.value(), 1, KItemListSelectionManager::Toggle);
1589                         m_selectionManager->setCurrentItem(m_pressedIndex.value());
1590                         m_selectionManager->beginAnchoredSelection(m_pressedIndex.value());
1591                     }
1592                     return true; // event handled, don't create rubber band
1593                 }
1594             } else {
1595                 // we're not inside the text/icon rect, as we've already cleared the selection
1596                 // we can just stop here and make sure handlers down the line (i.e. onRelease) don't activate
1597                 m_pressedIndex.reset();
1598                 // we don't stop event propagation and proceed to create a rubber band and let onRelease
1599                 // decide (based on m_pressedIndex) whether we're in a drag (drag => new rubber band, click => don't select the item)
1600                 return false;
1601             }
1602         }
1603     } else if (pressedItemAlreadySelected && !shiftOrControlPressed && leftClick) {
1604         // The user might want to start dragging multiple items, but if he clicks the item
1605         // in order to trigger it instead, the other selected items must be deselected.
1606         // However, we do not know yet what the user is going to do.
1607         // -> remember that the user pressed an item which had been selected already and
1608         //    clear the selection in mouseReleaseEvent(), unless the items are dragged.
1609         m_clearSelectionIfItemsAreNotDragged = true;
1610
1611         if (m_selectionManager->selectedItems().count() == 1 && m_view->isAboveText(m_pressedIndex.value_or(-1), pressedMousePos)) {
1612             Q_EMIT selectedItemTextPressed(m_pressedIndex.value_or(-1));
1613         }
1614     }
1615
1616     if (!shiftPressed) {
1617         // Finish the anchored selection before the current index is changed
1618         m_selectionManager->endAnchoredSelection();
1619     }
1620
1621     if (rightClick) {
1622         // Do header hit check and short circuit before commencing any state changing effects
1623         if (m_view->headerBoundaries().contains(pos)) {
1624             Q_EMIT headerContextMenuRequested(screenPos);
1625             return true;
1626         }
1627
1628         // Stop rubber band from persisting after right-clicks
1629         KItemListRubberBand *rubberBand = m_view->rubberBand();
1630         if (rubberBand->isActive()) {
1631             disconnect(rubberBand, &KItemListRubberBand::endPositionChanged, this, &KItemListController::slotRubberBandChanged);
1632             rubberBand->setActive(false);
1633             m_view->setAutoScroll(false);
1634         }
1635     }
1636
1637     if (m_pressedIndex.has_value()) {
1638         // The hover highlight area of an item is being pressed.
1639         m_selectionManager->setCurrentItem(m_pressedIndex.value());
1640         const auto row = m_view->m_visibleItems.value(m_pressedIndex.value()); // anything outside of row.contains() will be the empty region of the row rect
1641         const bool hitTargetIsRowEmptyRegion = !row->contains(row->mapFromItem(m_view, pos));
1642         // again, when this method returns false, a rubberBand selection is created as the event is not consumed;
1643         // createRubberBand here tells us whether to return true or false.
1644         bool createRubberBand = (hitTargetIsRowEmptyRegion && m_selectionManager->selectedItems().isEmpty());
1645
1646         if (rightClick && hitTargetIsRowEmptyRegion) {
1647             // We have a right click outside the icon and text rect but within the hover highlight area
1648             // but it is unclear if this means that a selection rectangle for an item was clicked or the background of the view.
1649             if (m_selectionManager->selectedItems().contains(m_pressedIndex.value())) {
1650                 // The selection rectangle for an item was clicked
1651                 Q_EMIT itemContextMenuRequested(m_pressedIndex.value(), screenPos);
1652             } else {
1653                 row->setHovered(false); // Removes the hover highlight so the context menu doesn't look like it applies to the row.
1654                 Q_EMIT viewContextMenuRequested(screenPos);
1655             }
1656             return true;
1657         }
1658
1659         switch (m_selectionBehavior) {
1660         case NoSelection:
1661             break;
1662
1663         case SingleSelection:
1664             m_selectionManager->setSelected(m_pressedIndex.value());
1665             break;
1666
1667         case MultiSelection:
1668             if (controlPressed && !shiftPressed && leftClick) {
1669                 // A left mouse button press is happening on an item while control is pressed. This either means a user wants to:
1670                 // - toggle the selection of item(s) or
1671                 // - they want to begin a drag on the item(s) to copy them.
1672                 // We rule out the latter, if the item is not clicked directly and was unselected previously.
1673                 const auto row = m_view->m_visibleItems.value(m_pressedIndex.value());
1674                 const auto mappedPos = row->mapFromItem(m_view, pos);
1675                 if (!row->iconRect().contains(mappedPos) && !row->textRect().contains(mappedPos) && !pressedItemAlreadySelected) {
1676                     createRubberBand = true;
1677                 } else {
1678                     m_selectionManager->setSelected(m_pressedIndex.value(), 1, KItemListSelectionManager::Toggle);
1679                     m_selectionManager->beginAnchoredSelection(m_pressedIndex.value());
1680                     createRubberBand = false; // multi selection, don't propagate any further
1681                     // This will be the start of an item drag-to-copy operation if the user now moves the mouse before releasing the mouse button.
1682                 }
1683             } else if (!shiftPressed || !m_selectionManager->isAnchoredSelectionActive()) {
1684                 // Select the pressed item and start a new anchored selection
1685                 m_selectionManager->setSelected(m_pressedIndex.value(), 1, KItemListSelectionManager::Select);
1686                 m_selectionManager->beginAnchoredSelection(m_pressedIndex.value());
1687             }
1688             break;
1689
1690         default:
1691             Q_ASSERT(false);
1692             break;
1693         }
1694
1695         if (rightClick) {
1696             Q_EMIT itemContextMenuRequested(m_pressedIndex.value(), screenPos);
1697         }
1698         return !createRubberBand;
1699     }
1700
1701     if (rightClick) {
1702         // header right click handling would have been done before this so just normal context
1703         // menu here is fine
1704         Q_EMIT viewContextMenuRequested(screenPos);
1705         return true;
1706     }
1707
1708     return false;
1709 }
1710
1711 bool KItemListController::onRelease(const QPointF &pos, const Qt::KeyboardModifiers modifiers, const Qt::MouseButtons buttons, bool touch)
1712 {
1713     const QPointF pressedMousePos = pos;
1714     const bool isAboveSelectionToggle = m_view->isAboveSelectionToggle(m_pressedIndex.value_or(-1), pressedMousePos);
1715     if (isAboveSelectionToggle) {
1716         m_selectionTogglePressed = false;
1717         return true;
1718     }
1719
1720     if (!isAboveSelectionToggle && m_selectionTogglePressed) {
1721         m_selectionManager->setSelected(m_pressedIndex.value_or(-1), 1, KItemListSelectionManager::Toggle);
1722         m_selectionTogglePressed = false;
1723         return true;
1724     }
1725
1726     const bool controlPressed = modifiers & Qt::ControlModifier;
1727     const bool shiftOrControlPressed = modifiers & Qt::ShiftModifier || controlPressed;
1728
1729     const std::optional<int> index = m_view->itemAt(pos);
1730
1731     KItemListRubberBand *rubberBand = m_view->rubberBand();
1732     bool rubberBandRelease = false;
1733     if (rubberBand->isActive()) {
1734         disconnect(rubberBand, &KItemListRubberBand::endPositionChanged, this, &KItemListController::slotRubberBandChanged);
1735         rubberBand->setActive(false);
1736         m_oldSelection.clear();
1737         m_view->setAutoScroll(false);
1738         rubberBandRelease = true;
1739         // We check for actual rubber band drag here: if delta between start and end is less than drag threshold,
1740         // then we have a single click on one of the rows
1741         if ((rubberBand->endPosition() - rubberBand->startPosition()).manhattanLength() < QApplication::startDragDistance()) {
1742             rubberBandRelease = false; // since we're only selecting, unmark rubber band release flag
1743             // m_pressedIndex will have no value if we came from a multi-selection clearing onPress
1744             // in that case, we don't select anything
1745             if (index.has_value() && m_pressedIndex.has_value()) {
1746                 if (controlPressed && m_selectionBehavior == MultiSelection) {
1747                     m_selectionManager->setSelected(m_pressedIndex.value(), 1, KItemListSelectionManager::Toggle);
1748                 } else {
1749                     m_selectionManager->setSelected(index.value());
1750                 }
1751                 if (!m_selectionManager->isAnchoredSelectionActive()) {
1752                     m_selectionManager->beginAnchoredSelection(index.value());
1753                 }
1754             }
1755         }
1756     }
1757
1758     if (index.has_value() && index == m_pressedIndex) {
1759         // The release event is done above the same item as the press event
1760
1761         if (m_clearSelectionIfItemsAreNotDragged) {
1762             // A selected item has been clicked, but no drag operation has been started
1763             // -> clear the rest of the selection.
1764             m_selectionManager->clearSelection();
1765             m_selectionManager->setSelected(m_pressedIndex.value(), 1, KItemListSelectionManager::Select);
1766             m_selectionManager->beginAnchoredSelection(m_pressedIndex.value());
1767         }
1768
1769         if (buttons & Qt::LeftButton) {
1770             bool emitItemActivated = true;
1771             if (m_view->isAboveExpansionToggle(index.value(), pos)) {
1772                 const bool expanded = m_model->isExpanded(index.value());
1773                 m_model->setExpanded(index.value(), !expanded);
1774
1775                 Q_EMIT itemExpansionToggleClicked(index.value());
1776                 emitItemActivated = false;
1777             } else if (shiftOrControlPressed && m_selectionBehavior != SingleSelection) {
1778                 // The mouse click should only update the selection, not trigger the item, except when
1779                 // we are in single selection mode
1780                 emitItemActivated = false;
1781             } else {
1782                 const bool singleClickActivation = m_view->style()->styleHint(QStyle::SH_ItemView_ActivateItemOnSingleClick) || m_singleClickActivationEnforced;
1783                 if (!singleClickActivation) {
1784                     emitItemActivated = touch && !m_selectionMode;
1785                 } else {
1786                     // activate on single click only if we didn't come from a rubber band release
1787                     emitItemActivated = !rubberBandRelease;
1788                 }
1789             }
1790             if (emitItemActivated) {
1791                 Q_EMIT itemActivated(index.value());
1792             }
1793         } else if (buttons & Qt::MiddleButton) {
1794             Q_EMIT itemMiddleClicked(index.value());
1795         }
1796     }
1797
1798     m_pressedMouseGlobalPos = QPointF();
1799     m_pressedIndex = std::nullopt;
1800     m_clearSelectionIfItemsAreNotDragged = false;
1801     return false;
1802 }
1803
1804 void KItemListController::startRubberBand()
1805 {
1806     if (m_selectionBehavior == MultiSelection) {
1807         QPoint startPos = m_view->transform().map(m_view->scene()->views().first()->mapFromGlobal(m_pressedMouseGlobalPos.toPoint()));
1808         if (m_view->scrollOrientation() == Qt::Vertical) {
1809             startPos.ry() += m_view->scrollOffset();
1810             if (m_view->itemSize().width() < 0) {
1811                 // Use a special rubberband for views that have only one column and
1812                 // expand the rubberband to use the whole width of the view.
1813                 startPos.setX(0);
1814             }
1815         } else {
1816             startPos.rx() += m_view->scrollOffset();
1817         }
1818
1819         m_oldSelection = m_selectionManager->selectedItems();
1820         KItemListRubberBand *rubberBand = m_view->rubberBand();
1821         rubberBand->setStartPosition(startPos);
1822         rubberBand->setEndPosition(startPos);
1823         rubberBand->setActive(true);
1824         connect(rubberBand, &KItemListRubberBand::endPositionChanged, this, &KItemListController::slotRubberBandChanged);
1825         m_view->setAutoScroll(true);
1826     }
1827 }
1828
1829 void KItemListController::slotStateChanged(QScroller::State newState)
1830 {
1831     if (newState == QScroller::Scrolling) {
1832         m_scrollerIsScrolling = true;
1833     } else if (newState == QScroller::Inactive) {
1834         m_scrollerIsScrolling = false;
1835     }
1836 }
1837
1838 #include "moc_kitemlistcontroller.cpp"