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     const bool horizontalScrolling = m_view->scrollOrientation() == Qt::Horizontal;
 245
 246     // Handle the expanding/collapsing of items
 247     // expand / collapse all selected directories
 248     if (m_view->supportsItemExpanding() && m_model->isExpandable(index) && (key == Qt::Key_Right || key == Qt::Key_Left)) {
 249         const bool expandOrCollapse = key == Qt::Key_Right ? true : false;
 250         bool shouldReturn = m_model->setExpanded(index, expandOrCollapse);
 251
 252         // edit in reverse to preserve index of the first handled items
 253         const auto selectedItems = m_selectionManager->selectedItems();
 254         for (auto it = selectedItems.rbegin(); it != selectedItems.rend(); ++it) {
 255             shouldReturn |= m_model->setExpanded(*it, expandOrCollapse);
 256             if (!shiftPressed) {
 257                 m_selectionManager->setSelected(*it);
 258             }
 259         }
 260         if (shouldReturn) {
 261             // update keyboard anchors
 262             if (shiftPressed) {
 263                 m_keyboardAnchorIndex = selectedItems.count() > 0 ? qMin(index, selectedItems.last()) : index;
 264                 m_keyboardAnchorPos = keyboardAnchorPos(m_keyboardAnchorIndex);
 265             }
 266
 267             event->ignore();
 268             return true;
 269         }
 270     }
 271
 272     const bool controlPressed = event->modifiers() & Qt::ControlModifier;
 273     const bool shiftOrControlPressed = shiftPressed || controlPressed;
 274     const bool navigationPressed = key == Qt::Key_Home || key == Qt::Key_End || key == Qt::Key_PageUp || key == Qt::Key_PageDown || key == Qt::Key_Up
 275         || key == Qt::Key_Down || key == Qt::Key_Left || key == Qt::Key_Right;
 276
 277     const int itemCount = m_model->count();
 278
 279     // For horizontal scroll orientation, transform
 280     // the arrow keys to simplify the event handling.
 281     if (horizontalScrolling) {
 282         switch (key) {
 283         case Qt::Key_Up:
 284             key = Qt::Key_Left;
 285             break;
 286         case Qt::Key_Down:
 287             key = Qt::Key_Right;
 288             break;
 289         case Qt::Key_Left:
 290             key = Qt::Key_Up;
 291             break;
 292         case Qt::Key_Right:
 293             key = Qt::Key_Down;
 294             break;
 295         default:
 296             break;
 297         }
 298     }
 299
 300     if (m_view->layoutDirection() == Qt::RightToLeft) {
 301         if (horizontalScrolling) {
 302             // swap up and down arrow keys
 303             switch (key) {
 304             case Qt::Key_Up:
 305                 key = Qt::Key_Down;
 306                 break;
 307             case Qt::Key_Down:
 308                 key = Qt::Key_Up;
 309                 break;
 310             default:
 311                 break;
 312             }
 313         } else if (!m_view->supportsItemExpanding()) {
 314             // swap left and right arrow keys
 315             switch (key) {
 316             case Qt::Key_Left:
 317                 key = Qt::Key_Right;
 318                 break;
 319             case Qt::Key_Right:
 320                 key = Qt::Key_Left;
 321                 break;
 322             default:
 323                 break;
 324             }
 325         }
 326     }
 327
 328     const bool selectSingleItem = m_selectionBehavior != NoSelection && itemCount == 1 && navigationPressed;
 329
 330     if (selectSingleItem) {
 331         const int current = m_selectionManager->currentItem();
 332         m_selectionManager->setSelected(current);
 333         return true;
 334     }
 335
 336     switch (key) {
 337     case Qt::Key_Home:
 338         index = 0;
 339         m_keyboardAnchorIndex = index;
 340         m_keyboardAnchorPos = keyboardAnchorPos(index);
 341         break;
 342
 343     case Qt::Key_End:
 344         index = itemCount - 1;
 345         m_keyboardAnchorIndex = index;
 346         m_keyboardAnchorPos = keyboardAnchorPos(index);
 347         break;
 348
 349     case Qt::Key_Left:
 350         if (index > 0) {
 351             const int expandedParentsCount = m_model->expandedParentsCount(index);
 352             if (expandedParentsCount == 0) {
 353                 --index;
 354             } else {
 355                 // Go to the parent of the current item.
 356                 do {
 357                     --index;
 358                 } while (index > 0 && m_model->expandedParentsCount(index) == expandedParentsCount);
 359             }
 360             m_keyboardAnchorIndex = index;
 361             m_keyboardAnchorPos = keyboardAnchorPos(index);
 362         }
 363         break;
 364
 365     case Qt::Key_Right:
 366         if (index < itemCount - 1) {
 367             ++index;
 368             m_keyboardAnchorIndex = index;
 369             m_keyboardAnchorPos = keyboardAnchorPos(index);
 370         }
 371         break;
 372
 373     case Qt::Key_Up:
 374         updateKeyboardAnchor();
 375         if (shiftPressed && !m_selectionManager->isAnchoredSelectionActive() && m_selectionManager->isSelected(index)) {
 376             m_selectionManager->beginAnchoredSelection(index);
 377         }
 378         index = previousRowIndex(index);
 379         break;
 380
 381     case Qt::Key_Down:
 382         updateKeyboardAnchor();
 383         if (shiftPressed && !m_selectionManager->isAnchoredSelectionActive() && m_selectionManager->isSelected(index)) {
 384             m_selectionManager->beginAnchoredSelection(index);
 385         }
 386         index = nextRowIndex(index);
 387         break;
 388
 389     case Qt::Key_PageUp:
 390         if (horizontalScrolling) {
 391             // The new current index should correspond to the first item in the current column.
 392             int newIndex = qMax(index - 1, 0);
 393             while (newIndex != index && m_view->itemRect(newIndex).topLeft().y() < m_view->itemRect(index).topLeft().y()) {
 394                 index = newIndex;
 395                 newIndex = qMax(index - 1, 0);
 396             }
 397             m_keyboardAnchorIndex = index;
 398             m_keyboardAnchorPos = keyboardAnchorPos(index);
 399         } else {
 400             const qreal currentItemBottom = m_view->itemRect(index).bottomLeft().y();
 401             const qreal height = m_view->geometry().height();
 402
 403             // The new current item should be the first item in the current
 404             // column whose itemRect's top coordinate is larger than targetY.
 405             const qreal targetY = currentItemBottom - height;
 406
 407             updateKeyboardAnchor();
 408             int newIndex = previousRowIndex(index);
 409             do {
 410                 index = newIndex;
 411                 updateKeyboardAnchor();
 412                 newIndex = previousRowIndex(index);
 413             } while (m_view->itemRect(newIndex).topLeft().y() > targetY && newIndex != index);
 414         }
 415         break;
 416
 417     case Qt::Key_PageDown:
 418         if (horizontalScrolling) {
 419             // The new current index should correspond to the last item in the current column.
 420             int newIndex = qMin(index + 1, m_model->count() - 1);
 421             while (newIndex != index && m_view->itemRect(newIndex).topLeft().y() > m_view->itemRect(index).topLeft().y()) {
 422                 index = newIndex;
 423                 newIndex = qMin(index + 1, m_model->count() - 1);
 424             }
 425             m_keyboardAnchorIndex = index;
 426             m_keyboardAnchorPos = keyboardAnchorPos(index);
 427         } else {
 428             const qreal currentItemTop = m_view->itemRect(index).topLeft().y();
 429             const qreal height = m_view->geometry().height();
 430
 431             // The new current item should be the last item in the current
 432             // column whose itemRect's bottom coordinate is smaller than targetY.
 433             const qreal targetY = currentItemTop + height;
 434
 435             updateKeyboardAnchor();
 436             int newIndex = nextRowIndex(index);
 437             do {
 438                 index = newIndex;
 439                 updateKeyboardAnchor();
 440                 newIndex = nextRowIndex(index);
 441             } while (m_view->itemRect(newIndex).bottomLeft().y() < targetY && newIndex != index);
 442         }
 443         break;
 444
 445     case Qt::Key_Enter:
 446     case Qt::Key_Return: {
 447         const KItemSet selectedItems = m_selectionManager->selectedItems();
 448         if (selectedItems.count() >= 2) {
 449             Q_EMIT itemsActivated(selectedItems);
 450         } else if (selectedItems.count() == 1) {
 451             Q_EMIT itemActivated(selectedItems.first());
 452         } else {
 453             Q_EMIT itemActivated(index);
 454         }
 455         break;
 456     }
 457
 458     case Qt::Key_Escape:
 459         if (m_selectionMode) {
 460             Q_EMIT selectionModeChangeRequested(false);
 461         } else if (m_selectionBehavior != SingleSelection) {
 462             m_selectionManager->clearSelection();
 463         }
 464         m_keyboardManager->cancelSearch();
 465         Q_EMIT escapePressed();
 466         break;
 467
 468     case Qt::Key_Space:
 469         if (m_selectionBehavior == MultiSelection) {
 470             if (controlPressed) {
 471                 // Toggle the selection state of the current item.
 472                 m_selectionManager->endAnchoredSelection();
 473                 m_selectionManager->setSelected(index, 1, KItemListSelectionManager::Toggle);
 474                 m_selectionManager->beginAnchoredSelection(index);
 475                 break;
 476             } else {
 477                 // Select the current item if it is not selected yet.
 478                 const int current = m_selectionManager->currentItem();
 479                 if (!m_selectionManager->isSelected(current)) {
 480                     m_selectionManager->setSelected(current);
 481                     break;
 482                 }
 483             }
 484         }
 485         Q_FALLTHROUGH(); // fall through to the default case and add the Space to the current search string.
 486     default:
 487         m_keyboardManager->addKeys(event->text());
 488         // Make sure unconsumed events get propagated up the chain. #302329
 489         event->ignore();
 490         return false;
 491     }
 492
 493     if (m_selectionManager->currentItem() != index) {
 494         switch (m_selectionBehavior) {
 495         case NoSelection:
 496             m_selectionManager->setCurrentItem(index);
 497             break;
 498
 499         case SingleSelection:
 500             m_selectionManager->setCurrentItem(index);
 501             m_selectionManager->clearSelection();
 502             m_selectionManager->setSelected(index, 1);
 503             break;
 504
 505         case MultiSelection:
 506             if (controlPressed) {
 507                 m_selectionManager->endAnchoredSelection();
 508             }
 509
 510             m_selectionManager->setCurrentItem(index);
 511
 512             if (!shiftOrControlPressed) {
 513                 m_selectionManager->clearSelection();
 514                 m_selectionManager->setSelected(index, 1);
 515             }
 516
 517             if (!shiftPressed) {
 518                 m_selectionManager->beginAnchoredSelection(index);
 519             }
 520             break;
 521         }
 522     }
 523
 524     if (navigationPressed) {
 525         m_view->scrollToItem(index);
 526     }
 527     return true;
 528 }
 529
 530 void KItemListController::slotChangeCurrentItem(const QString &text, bool searchFromNextItem)
 531 {
 532     if (!m_model || m_model->count() == 0) {
 533         return;
 534     }
 535     int index;
 536     if (searchFromNextItem) {
 537         const int currentIndex = m_selectionManager->currentItem();
 538         index = m_model->indexForKeyboardSearch(text, (currentIndex + 1) % m_model->count());
 539     } else {
 540         index = m_model->indexForKeyboardSearch(text, 0);
 541     }
 542     if (index >= 0) {
 543         m_selectionManager->setCurrentItem(index);
 544
 545         if (m_selectionBehavior != NoSelection) {
 546             m_selectionManager->replaceSelection(index);
 547             m_selectionManager->beginAnchoredSelection(index);
 548         }
 549
 550         m_view->scrollToItem(index, KItemListView::ViewItemPosition::Beginning);
 551     }
 552 }
 553
 554 void KItemListController::slotAutoActivationTimeout()
 555 {
 556     if (!m_model || !m_view) {
 557         return;
 558     }
 559
 560     const int index = m_autoActivationTimer->property("index").toInt();
 561     if (index < 0 || index >= m_model->count()) {
 562         return;
 563     }
 564
 565     /* m_view->isUnderMouse() fixes a bug in the Folder-View-Panel and in the
 566      * Places-Panel.
 567      *
 568      * Bug: When you drag a file onto a Folder-View-Item or a Places-Item and
 569      * then move away before the auto-activation timeout triggers, than the
 570      * item still becomes activated/expanded.
 571      *
 572      * See Bug 293200 and 305783
 573      */
 574     if (m_view->isUnderMouse()) {
 575         if (m_view->supportsItemExpanding() && m_model->isExpandable(index)) {
 576             const bool expanded = m_model->isExpanded(index);
 577             m_model->setExpanded(index, !expanded);
 578         } else if (m_autoActivationBehavior != ExpansionOnly) {
 579             Q_EMIT itemActivated(index);
 580         }
 581     }
 582 }
 583
 584 bool KItemListController::inputMethodEvent(QInputMethodEvent *event)
 585 {
 586     Q_UNUSED(event)
 587     return false;
 588 }
 589
 590 bool KItemListController::mousePressEvent(QGraphicsSceneMouseEvent *event, const QTransform &transform)
 591 {
 592     m_mousePress = true;
 593     m_pressedMouseGlobalPos = event->screenPos();
 594
 595     if (event->source() == Qt::MouseEventSynthesizedByQt && m_isTouchEvent) {
 596         return false;
 597     }
 598
 599     if (!m_view) {
 600         return false;
 601     }
 602
 603     const QPointF pressedMousePos = transform.map(event->pos());
 604     m_pressedIndex = m_view->itemAt(pressedMousePos);
 605
 606     const Qt::MouseButtons buttons = event->buttons();
 607
 608     if (!onPress(event->pos(), event->modifiers(), buttons)) {
 609         startRubberBand();
 610         return false;
 611     }
 612
 613     return true;
 614 }
 615
 616 bool KItemListController::mouseMoveEvent(QGraphicsSceneMouseEvent *event, const QTransform &transform)
 617 {
 618     if (!m_view) {
 619         return false;
 620     }
 621
 622     if (m_view->m_tapAndHoldIndicator->isActive()) {
 623         m_view->m_tapAndHoldIndicator->setActive(false);
 624     }
 625
 626     if (event->source() == Qt::MouseEventSynthesizedByQt && !m_dragActionOrRightClick && m_isTouchEvent) {
 627         return false;
 628     }
 629
 630     if (m_pressedIndex.has_value() && !m_view->rubberBand()->isActive()) {
 631         // Check whether a dragging should be started
 632         if (event->buttons() & Qt::LeftButton) {
 633             const auto distance = (event->screenPos() - m_pressedMouseGlobalPos).manhattanLength();
 634             if (distance >= QApplication::startDragDistance()) {
 635                 if (!m_selectionManager->isSelected(m_pressedIndex.value())) {
 636                     // Always assure that the dragged item gets selected. Usually this is already
 637                     // done on the mouse-press event, but when using the selection-toggle on a
 638                     // selected item the dragged item is not selected yet.
 639                     m_selectionManager->setSelected(m_pressedIndex.value(), 1, KItemListSelectionManager::Toggle);
 640                 } else {
 641                     // A selected item has been clicked to drag all selected items
 642                     // -> the selection should not be cleared when the mouse button is released.
 643                     m_clearSelectionIfItemsAreNotDragged = false;
 644                 }
 645                 startDragging();
 646                 m_mousePress = false;
 647             }
 648         }
 649     } else {
 650         KItemListRubberBand *rubberBand = m_view->rubberBand();
 651         if (rubberBand->isActive()) {
 652             QPointF endPos = transform.map(event->pos());
 653
 654             // Update the current item.
 655             const std::optional<int> newCurrent = m_view->itemAt(endPos);
 656             if (newCurrent.has_value()) {
 657                 // It's expected that the new current index is also the new anchor (bug 163451).
 658                 m_selectionManager->endAnchoredSelection();
 659                 m_selectionManager->setCurrentItem(newCurrent.value());
 660                 m_selectionManager->beginAnchoredSelection(newCurrent.value());
 661             }
 662
 663             if (m_view->scrollOrientation() == Qt::Vertical) {
 664                 endPos.ry() += m_view->scrollOffset();
 665             } else {
 666                 endPos.rx() += m_view->scrollOffset();
 667             }
 668             rubberBand->setEndPosition(endPos);
 669         }
 670     }
 671
 672     return false;
 673 }
 674
 675 bool KItemListController::mouseReleaseEvent(QGraphicsSceneMouseEvent *event, const QTransform &transform)
 676 {
 677     m_mousePress = false;
 678     m_isTouchEvent = false;
 679
 680     if (!m_view) {
 681         return false;
 682     }
 683
 684     if (m_view->m_tapAndHoldIndicator->isActive()) {
 685         m_view->m_tapAndHoldIndicator->setActive(false);
 686     }
 687
 688     KItemListRubberBand *rubberBand = m_view->rubberBand();
 689     if (event->source() == Qt::MouseEventSynthesizedByQt && !rubberBand->isActive() && m_isTouchEvent) {
 690         return false;
 691     }
 692
 693     Q_EMIT mouseButtonReleased(m_pressedIndex.value_or(-1), event->buttons());
 694
 695     return onRelease(transform.map(event->pos()), event->modifiers(), event->button(), false);
 696 }
 697
 698 bool KItemListController::mouseDoubleClickEvent(QGraphicsSceneMouseEvent *event, const QTransform &transform)
 699 {
 700     const QPointF pos = transform.map(event->pos());
 701     const std::optional<int> index = m_view->itemAt(pos);
 702
 703     // Expand item if desired - See Bug 295573
 704     if (m_mouseDoubleClickAction != ActivateItemOnly) {
 705         if (m_view && m_model && m_view->supportsItemExpanding() && m_model->isExpandable(index.value_or(-1))) {
 706             const bool expanded = m_model->isExpanded(index.value());
 707             m_model->setExpanded(index.value(), !expanded);
 708         }
 709     }
 710
 711     if (event->button() & Qt::RightButton) {
 712         return false;
 713     }
 714
 715     bool emitItemActivated = !(m_view->style()->styleHint(QStyle::SH_ItemView_ActivateItemOnSingleClick) || m_singleClickActivationEnforced)
 716         && (event->button() & Qt::LeftButton) && index.has_value() && index.value() < m_model->count();
 717     if (emitItemActivated) {
 718         Q_EMIT itemActivated(index.value());
 719     }
 720     return false;
 721 }
 722
 723 bool KItemListController::contextMenuEvent(QContextMenuEvent *event)
 724 {
 725     if (event->reason() == QContextMenuEvent::Keyboard) {
 726         // Emit the signal itemContextMenuRequested() if at least one item is selected.
 727         // Otherwise the signal viewContextMenuRequested() will be emitted.
 728         const KItemSet selectedItems = m_selectionManager->selectedItems();
 729         int index = -1;
 730         if (selectedItems.count() >= 2) {
 731             const int currentItemIndex = m_selectionManager->currentItem();
 732             index = selectedItems.contains(currentItemIndex) ? currentItemIndex : selectedItems.first();
 733         } else if (selectedItems.count() == 1) {
 734             index = selectedItems.first();
 735         }
 736
 737         if (index >= 0) {
 738             const QRectF contextRect = m_view->itemContextRect(index);
 739             const QPointF pos(m_view->scene()->views().first()->mapToGlobal(contextRect.bottomRight().toPoint()));
 740             Q_EMIT itemContextMenuRequested(index, pos);
 741         } else {
 742             Q_EMIT viewContextMenuRequested(event->globalPos());
 743         }
 744         return true;
 745     }
 746
 747     const auto pos = event->pos();
 748     const auto globalPos = event->globalPos();
 749
 750     if (m_view->headerBoundaries().contains(pos)) {
 751         Q_EMIT headerContextMenuRequested(globalPos);
 752         return true;
 753     }
 754
 755     const auto pressedItem = m_view->itemAt(pos);
 756     // We only open a context menu for the pressed item if it is selected.
 757     // That's because the same click might have de-selected the item or because the press was only in the row of the item but not on it.
 758     if (pressedItem && m_selectionManager->selectedItems().contains(pressedItem.value())) {
 759         // The selection rectangle for an item was clicked
 760         Q_EMIT itemContextMenuRequested(pressedItem.value(), globalPos);
 761         return true;
 762     }
 763
 764     // Remove any hover highlights so the context menu doesn't look like it applies to a row.
 765     const auto widgets = m_view->visibleItemListWidgets();
 766     for (KItemListWidget *widget : widgets) {
 767         if (widget->isHovered()) {
 768             widget->setHovered(false);
 769             Q_EMIT itemUnhovered(widget->index());
 770         }
 771     }
 772     Q_EMIT viewContextMenuRequested(globalPos);
 773     return true;
 774 }
 775
 776 bool KItemListController::dragEnterEvent(QGraphicsSceneDragDropEvent *event, const QTransform &transform)
 777 {
 778     Q_UNUSED(event)
 779     Q_UNUSED(transform)
 780
 781     DragAndDropHelper::clearUrlListMatchesUrlCache();
 782
 783     return false;
 784 }
 785
 786 bool KItemListController::dragLeaveEvent(QGraphicsSceneDragDropEvent *event, const QTransform &transform)
 787 {
 788     Q_UNUSED(event)
 789     Q_UNUSED(transform)
 790
 791     m_autoActivationTimer->stop();
 792     m_view->setAutoScroll(false);
 793     m_view->hideDropIndicator();
 794
 795     KItemListWidget *widget = hoveredWidget();
 796     if (widget) {
 797         widget->setHovered(false);
 798         Q_EMIT itemUnhovered(widget->index());
 799     }
 800     return false;
 801 }
 802
 803 bool KItemListController::dragMoveEvent(QGraphicsSceneDragDropEvent *event, const QTransform &transform)
 804 {
 805     if (!m_model || !m_view) {
 806         return false;
 807     }
 808
 809     QUrl hoveredDir = m_model->directory();
 810     KItemListWidget *oldHoveredWidget = hoveredWidget();
 811
 812     const QPointF pos = transform.map(event->pos());
 813     KItemListWidget *newHoveredWidget = widgetForDropPos(pos);
 814     int index = -1;
 815
 816     if (oldHoveredWidget != newHoveredWidget) {
 817         m_autoActivationTimer->stop();
 818
 819         if (oldHoveredWidget) {
 820             oldHoveredWidget->setHovered(false);
 821             Q_EMIT itemUnhovered(oldHoveredWidget->index());
 822         }
 823     }
 824
 825     if (newHoveredWidget) {
 826         bool droppingBetweenItems = false;
 827         if (m_model->sortRole().isEmpty()) {
 828             // The model supports inserting items between other items.
 829             droppingBetweenItems = (m_view->showDropIndicator(pos) >= 0);
 830         }
 831
 832         index = newHoveredWidget->index();
 833
 834         if (m_model->isDir(index)) {
 835             hoveredDir = m_model->url(index);
 836         }
 837
 838         if (!droppingBetweenItems) {
 839             // Something has been dragged on an item.
 840             m_view->hideDropIndicator();
 841             if (!newHoveredWidget->isHovered()) {
 842                 newHoveredWidget->setHovered(true);
 843                 Q_EMIT itemHovered(index);
 844             }
 845
 846             if (!m_autoActivationTimer->isActive() && m_autoActivationTimer->interval() >= 0 && m_model->canEnterOnHover(index)) {
 847                 m_autoActivationTimer->setProperty("index", index);
 848                 m_autoActivationTimer->start();
 849                 newHoveredWidget->startActivateSoonAnimation(m_autoActivationTimer->remainingTime());
 850             }
 851
 852         } else {
 853             m_autoActivationTimer->stop();
 854             if (newHoveredWidget && newHoveredWidget->isHovered()) {
 855                 newHoveredWidget->setHovered(false);
 856                 Q_EMIT itemUnhovered(index);
 857             }
 858         }
 859     } else {
 860         m_view->hideDropIndicator();
 861     }
 862
 863     if (DragAndDropHelper::urlListMatchesUrl(event->mimeData()->urls(), hoveredDir)) {
 864         event->setDropAction(Qt::IgnoreAction);
 865         event->ignore();
 866     } else {
 867         if (m_model->supportsDropping(index)) {
 868             event->setDropAction(event->proposedAction());
 869             event->accept();
 870         } else {
 871             event->setDropAction(Qt::IgnoreAction);
 872             event->ignore();
 873         }
 874     }
 875     return false;
 876 }
 877
 878 bool KItemListController::dropEvent(QGraphicsSceneDragDropEvent *event, const QTransform &transform)
 879 {
 880     if (!m_view) {
 881         return false;
 882     }
 883
 884     m_autoActivationTimer->stop();
 885     m_view->setAutoScroll(false);
 886
 887     const QPointF pos = transform.map(event->pos());
 888
 889     int dropAboveIndex = -1;
 890     if (m_model->sortRole().isEmpty()) {
 891         // The model supports inserting of items between other items.
 892         dropAboveIndex = m_view->showDropIndicator(pos);
 893     }
 894
 895     if (dropAboveIndex >= 0) {
 896         // Something has been dropped between two items.
 897         m_view->hideDropIndicator();
 898         Q_EMIT aboveItemDropEvent(dropAboveIndex, event);
 899     } else if (!event->mimeData()->hasFormat(m_model->blacklistItemDropEventMimeType())) {
 900         // Something has been dropped on an item or on an empty part of the view.
 901         const KItemListWidget *receivingWidget = widgetForDropPos(pos);
 902         if (receivingWidget) {
 903             Q_EMIT itemDropEvent(receivingWidget->index(), event);
 904         } else {
 905             Q_EMIT itemDropEvent(-1, event);
 906         }
 907     }
 908
 909     QAccessibleEvent accessibilityEvent(view(), QAccessible::DragDropEnd);
 910     QAccessible::updateAccessibility(&accessibilityEvent);
 911
 912     return true;
 913 }
 914
 915 bool KItemListController::hoverEnterEvent(QGraphicsSceneHoverEvent *event, const QTransform &transform)
 916 {
 917     Q_UNUSED(event)
 918     Q_UNUSED(transform)
 919     return false;
 920 }
 921
 922 bool KItemListController::hoverMoveEvent(QGraphicsSceneHoverEvent *event, const QTransform &transform)
 923 {
 924     Q_UNUSED(transform)
 925     if (!m_model || !m_view) {
 926         return false;
 927     }
 928
 929     // We identify the widget whose expansionArea had been hovered before this hoverMoveEvent() triggered.
 930     // we can't use hoveredWidget() here (it handles the icon+text rect, not the expansion rect)
 931     // like hoveredWidget(), we find the hovered widget for the expansion rect
 932     const auto visibleItemListWidgets = m_view->visibleItemListWidgets();
 933     const auto oldHoveredExpansionWidgetIterator = std::find_if(visibleItemListWidgets.begin(), visibleItemListWidgets.end(), [](auto &widget) {
 934         return widget->expansionAreaHovered();
 935     });
 936     const auto oldHoveredExpansionWidget =
 937         oldHoveredExpansionWidgetIterator == visibleItemListWidgets.end() ? std::nullopt : std::make_optional(*oldHoveredExpansionWidgetIterator);
 938
 939     const auto unhoverOldHoveredWidget = [&]() {
 940         if (auto oldHoveredWidget = hoveredWidget(); oldHoveredWidget) {
 941             // handle the text+icon one
 942             oldHoveredWidget->setHovered(false);
 943             Q_EMIT itemUnhovered(oldHoveredWidget->index());
 944         }
 945     };
 946
 947     const auto unhoverOldExpansionWidget = [&]() {
 948         if (oldHoveredExpansionWidget) {
 949             // then the expansion toggle
 950             (*oldHoveredExpansionWidget)->setExpansionAreaHovered(false);
 951         }
 952     };
 953
 954     const QPointF pos = transform.map(event->pos());
 955     if (KItemListWidget *newHoveredWidget = widgetForPos(pos); newHoveredWidget) {
 956         // something got hovered, work out which part and set hover for the appropriate widget
 957         const auto mappedPos = newHoveredWidget->mapFromItem(m_view, pos);
 958         const bool isOnExpansionToggle = newHoveredWidget->expansionToggleRect().contains(mappedPos);
 959
 960         if (isOnExpansionToggle) {
 961             // make sure we unhover the old one first if old!=new
 962             if (oldHoveredExpansionWidget && *oldHoveredExpansionWidget != newHoveredWidget) {
 963                 (*oldHoveredExpansionWidget)->setExpansionAreaHovered(false);
 964             }
 965             // 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)
 966             unhoverOldHoveredWidget();
 967
 968             newHoveredWidget->setExpansionAreaHovered(true);
 969         } else {
 970             // make sure we unhover the old one first if old!=new
 971             auto oldHoveredWidget = hoveredWidget();
 972             if (oldHoveredWidget && oldHoveredWidget != newHoveredWidget) {
 973                 oldHoveredWidget->setHovered(false);
 974                 Q_EMIT itemUnhovered(oldHoveredWidget->index());
 975             }
 976             // 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)
 977             unhoverOldExpansionWidget();
 978
 979             const bool isOverIconAndText = newHoveredWidget->iconRect().contains(mappedPos) || newHoveredWidget->textRect().contains(mappedPos);
 980             const bool hasMultipleSelection = m_selectionManager->selectedItems().count() > 1;
 981
 982             if (hasMultipleSelection && !isOverIconAndText) {
 983                 // In case we have multiple selections, clicking on any row will deselect the selection.
 984                 // So, as a visual cue for signalling that clicking anywhere won't select, but clear current highlights,
 985                 // we disable hover of the *row*(i.e. blank space to the right of the icon+text)
 986
 987                 // (no-op in this branch for masked hover)
 988             } else {
 989                 newHoveredWidget->setHoverPosition(mappedPos);
 990                 if (oldHoveredWidget != newHoveredWidget) {
 991                     newHoveredWidget->setHovered(true);
 992                     Q_EMIT itemHovered(newHoveredWidget->index());
 993                 }
 994             }
 995         }
 996     } else {
 997         // unhover any currently hovered expansion and text+icon widgets
 998         unhoverOldHoveredWidget();
 999         unhoverOldExpansionWidget();
1000     }
1001     return false;
1002 }
1003
1004 bool KItemListController::hoverLeaveEvent(QGraphicsSceneHoverEvent *event, const QTransform &transform)
1005 {
1006     Q_UNUSED(event)
1007     Q_UNUSED(transform)
1008
1009     m_mousePress = false;
1010     m_isTouchEvent = false;
1011
1012     if (!m_model || !m_view) {
1013         return false;
1014     }
1015
1016     const auto widgets = m_view->visibleItemListWidgets();
1017     for (KItemListWidget *widget : widgets) {
1018         if (widget->isHovered()) {
1019             widget->setHovered(false);
1020             Q_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::gestureEvent(QGestureEvent *event, const QTransform &transform)
1041 {
1042     if (!m_view) {
1043         return false;
1044     }
1045
1046     //you can touch on different views at the same time, but only one QWidget gets a mousePressEvent
1047     //we use this to get the right QWidget
1048     //the only exception is a tap gesture with state GestureStarted, we need to reset some variable
1049     if (!m_mousePress) {
1050         if (QGesture *tap = event->gesture(Qt::TapGesture)) {
1051             QTapGesture *tapGesture = static_cast<QTapGesture *>(tap);
1052             if (tapGesture->state() == Qt::GestureStarted) {
1053                 tapTriggered(tapGesture, transform);
1054             }
1055         }
1056         return false;
1057     }
1058
1059     bool accepted = false;
1060
1061     if (QGesture *tap = event->gesture(Qt::TapGesture)) {
1062         tapTriggered(static_cast<QTapGesture *>(tap), transform);
1063         accepted = true;
1064     }
1065     if (event->gesture(Qt::TapAndHoldGesture)) {
1066         tapAndHoldTriggered(event, transform);
1067         accepted = true;
1068     }
1069     if (event->gesture(Qt::PinchGesture)) {
1070         pinchTriggered(event, transform);
1071         accepted = true;
1072     }
1073     if (event->gesture(m_swipeGesture)) {
1074         swipeTriggered(event, transform);
1075         accepted = true;
1076     }
1077     if (event->gesture(m_twoFingerTapGesture)) {
1078         twoFingerTapTriggered(event, transform);
1079         accepted = true;
1080     }
1081     return accepted;
1082 }
1083
1084 bool KItemListController::touchBeginEvent(QTouchEvent *event, const QTransform &transform)
1085 {
1086     Q_UNUSED(event)
1087     Q_UNUSED(transform)
1088
1089     m_isTouchEvent = true;
1090     return false;
1091 }
1092
1093 void KItemListController::tapTriggered(QTapGesture *tap, const QTransform &transform)
1094 {
1095     static bool scrollerWasActive = false;
1096
1097     if (tap->state() == Qt::GestureStarted) {
1098         m_dragActionOrRightClick = false;
1099         m_isSwipeGesture = false;
1100         m_pinchGestureInProgress = false;
1101         scrollerWasActive = m_scrollerIsScrolling;
1102     }
1103
1104     if (tap->state() == Qt::GestureFinished) {
1105         m_mousePress = false;
1106
1107         //if at the moment of the gesture start the QScroller was active, the user made the tap
1108         //to stop the QScroller and not to tap on an item
1109         if (scrollerWasActive) {
1110             return;
1111         }
1112
1113         if (m_view->m_tapAndHoldIndicator->isActive()) {
1114             m_view->m_tapAndHoldIndicator->setActive(false);
1115         }
1116
1117         const QPointF pressedMousePos = transform.map(tap->position());
1118         m_pressedIndex = m_view->itemAt(pressedMousePos);
1119         if (m_dragActionOrRightClick) {
1120             m_dragActionOrRightClick = false;
1121         } else {
1122             onPress(tap->position().toPoint(), Qt::NoModifier, Qt::LeftButton);
1123             onRelease(transform.map(tap->position()), Qt::NoModifier, Qt::LeftButton, true);
1124         }
1125         m_isTouchEvent = false;
1126     }
1127 }
1128
1129 void KItemListController::tapAndHoldTriggered(QGestureEvent *event, const QTransform &transform)
1130 {
1131     //the Qt TabAndHold gesture is triggerable with a mouse click, we don't want this
1132     if (!m_isTouchEvent) {
1133         return;
1134     }
1135
1136     const QTapAndHoldGesture *tap = static_cast<QTapAndHoldGesture *>(event->gesture(Qt::TapAndHoldGesture));
1137     if (tap->state() == Qt::GestureFinished) {
1138         //if a pinch gesture is in progress we don't want a TabAndHold gesture
1139         if (m_pinchGestureInProgress) {
1140             return;
1141         }
1142         const QPointF pressedMousePos = transform.map(event->mapToGraphicsScene(tap->position()));
1143         m_pressedIndex = m_view->itemAt(pressedMousePos);
1144         if (m_pressedIndex.has_value()) {
1145             if (!m_selectionManager->isSelected(m_pressedIndex.value())) {
1146                 m_selectionManager->clearSelection();
1147                 m_selectionManager->setSelected(m_pressedIndex.value());
1148             }
1149             if (!m_selectionMode) {
1150                 Q_EMIT selectionModeChangeRequested(true);
1151             }
1152         } else {
1153             m_selectionManager->clearSelection();
1154             startRubberBand();
1155         }
1156
1157         Q_EMIT scrollerStop();
1158
1159         m_view->m_tapAndHoldIndicator->setStartPosition(pressedMousePos);
1160         m_view->m_tapAndHoldIndicator->setActive(true);
1161
1162         m_dragActionOrRightClick = true;
1163     }
1164 }
1165
1166 void KItemListController::pinchTriggered(QGestureEvent *event, const QTransform &transform)
1167 {
1168     Q_UNUSED(transform)
1169
1170     const QPinchGesture *pinch = static_cast<QPinchGesture *>(event->gesture(Qt::PinchGesture));
1171     const qreal sensitivityModifier = 0.2;
1172     static qreal counter = 0;
1173
1174     if (pinch->state() == Qt::GestureStarted) {
1175         m_pinchGestureInProgress = true;
1176         counter = 0;
1177     }
1178     if (pinch->state() == Qt::GestureUpdated) {
1179         //if a swipe gesture was recognized or in progress, we don't want a pinch gesture to change the zoom
1180         if (m_isSwipeGesture) {
1181             return;
1182         }
1183         counter = counter + (pinch->scaleFactor() - 1);
1184         if (counter >= sensitivityModifier) {
1185             Q_EMIT increaseZoom();
1186             counter = 0;
1187         } else if (counter <= -sensitivityModifier) {
1188             Q_EMIT decreaseZoom();
1189             counter = 0;
1190         }
1191     }
1192 }
1193
1194 void KItemListController::swipeTriggered(QGestureEvent *event, const QTransform &transform)
1195 {
1196     Q_UNUSED(transform)
1197
1198     const KTwoFingerSwipe *swipe = static_cast<KTwoFingerSwipe *>(event->gesture(m_swipeGesture));
1199
1200     if (!swipe) {
1201         return;
1202     }
1203     if (swipe->state() == Qt::GestureStarted) {
1204         m_isSwipeGesture = true;
1205     }
1206
1207     if (swipe->state() == Qt::GestureCanceled) {
1208         m_isSwipeGesture = false;
1209     }
1210
1211     if (swipe->state() == Qt::GestureFinished) {
1212         Q_EMIT scrollerStop();
1213
1214         if (swipe->swipeAngle() <= 20 || swipe->swipeAngle() >= 340) {
1215             Q_EMIT mouseButtonPressed(m_pressedIndex.value_or(-1), Qt::BackButton);
1216         } else if (swipe->swipeAngle() <= 200 && swipe->swipeAngle() >= 160) {
1217             Q_EMIT mouseButtonPressed(m_pressedIndex.value_or(-1), Qt::ForwardButton);
1218         } else if (swipe->swipeAngle() <= 110 && swipe->swipeAngle() >= 60) {
1219             Q_EMIT swipeUp();
1220         }
1221         m_isSwipeGesture = true;
1222     }
1223 }
1224
1225 void KItemListController::twoFingerTapTriggered(QGestureEvent *event, const QTransform &transform)
1226 {
1227     const KTwoFingerTap *twoTap = static_cast<KTwoFingerTap *>(event->gesture(m_twoFingerTapGesture));
1228
1229     if (!twoTap) {
1230         return;
1231     }
1232
1233     if (twoTap->state() == Qt::GestureStarted) {
1234         const QPointF pressedMousePos = transform.map(twoTap->pos());
1235         m_pressedIndex = m_view->itemAt(pressedMousePos);
1236         if (m_pressedIndex.has_value()) {
1237             onPress(twoTap->pos().toPoint(), Qt::ControlModifier, Qt::LeftButton);
1238             onRelease(transform.map(twoTap->pos()), Qt::ControlModifier, Qt::LeftButton, false);
1239         }
1240     }
1241 }
1242
1243 bool KItemListController::processEvent(QEvent *event, const QTransform &transform)
1244 {
1245     if (!event) {
1246         return false;
1247     }
1248
1249     switch (event->type()) {
1250     case QEvent::KeyPress:
1251         return keyPressEvent(static_cast<QKeyEvent *>(event));
1252     case QEvent::InputMethod:
1253         return inputMethodEvent(static_cast<QInputMethodEvent *>(event));
1254     case QEvent::GraphicsSceneMousePress:
1255         return mousePressEvent(static_cast<QGraphicsSceneMouseEvent *>(event), QTransform());
1256     case QEvent::GraphicsSceneMouseMove:
1257         return mouseMoveEvent(static_cast<QGraphicsSceneMouseEvent *>(event), QTransform());
1258     case QEvent::GraphicsSceneMouseRelease:
1259         return mouseReleaseEvent(static_cast<QGraphicsSceneMouseEvent *>(event), QTransform());
1260     case QEvent::GraphicsSceneMouseDoubleClick:
1261         return mouseDoubleClickEvent(static_cast<QGraphicsSceneMouseEvent *>(event), QTransform());
1262     case QEvent::ContextMenu:
1263         return contextMenuEvent(static_cast<QContextMenuEvent *>(event));
1264     case QEvent::GraphicsSceneWheel:
1265         return wheelEvent(static_cast<QGraphicsSceneWheelEvent *>(event), QTransform());
1266     case QEvent::GraphicsSceneDragEnter:
1267         return dragEnterEvent(static_cast<QGraphicsSceneDragDropEvent *>(event), QTransform());
1268     case QEvent::GraphicsSceneDragLeave:
1269         return dragLeaveEvent(static_cast<QGraphicsSceneDragDropEvent *>(event), QTransform());
1270     case QEvent::GraphicsSceneDragMove:
1271         return dragMoveEvent(static_cast<QGraphicsSceneDragDropEvent *>(event), QTransform());
1272     case QEvent::GraphicsSceneDrop:
1273         return dropEvent(static_cast<QGraphicsSceneDragDropEvent *>(event), QTransform());
1274     case QEvent::GraphicsSceneHoverEnter:
1275         return hoverEnterEvent(static_cast<QGraphicsSceneHoverEvent *>(event), QTransform());
1276     case QEvent::GraphicsSceneHoverMove:
1277         return hoverMoveEvent(static_cast<QGraphicsSceneHoverEvent *>(event), QTransform());
1278     case QEvent::GraphicsSceneHoverLeave:
1279         return hoverLeaveEvent(static_cast<QGraphicsSceneHoverEvent *>(event), QTransform());
1280     case QEvent::GraphicsSceneResize:
1281         return resizeEvent(static_cast<QGraphicsSceneResizeEvent *>(event), transform);
1282     case QEvent::Gesture:
1283         return gestureEvent(static_cast<QGestureEvent *>(event), transform);
1284     case QEvent::TouchBegin:
1285         return touchBeginEvent(static_cast<QTouchEvent *>(event), transform);
1286     default:
1287         break;
1288     }
1289
1290     return false;
1291 }
1292
1293 void KItemListController::slotViewScrollOffsetChanged(qreal current, qreal previous)
1294 {
1295     if (!m_view) {
1296         return;
1297     }
1298
1299     KItemListRubberBand *rubberBand = m_view->rubberBand();
1300     if (rubberBand->isActive()) {
1301         const qreal diff = current - previous;
1302         // TODO: Ideally just QCursor::pos() should be used as
1303         // new end-position but it seems there is no easy way
1304         // to have something like QWidget::mapFromGlobal() for QGraphicsWidget
1305         // (... or I just missed an easy way to do the mapping)
1306         QPointF endPos = rubberBand->endPosition();
1307         if (m_view->scrollOrientation() == Qt::Vertical) {
1308             endPos.ry() += diff;
1309         } else {
1310             endPos.rx() += diff;
1311         }
1312
1313         rubberBand->setEndPosition(endPos);
1314     }
1315 }
1316
1317 void KItemListController::slotRubberBandChanged()
1318 {
1319     if (!m_view || !m_model || m_model->count() <= 0) {
1320         return;
1321     }
1322
1323     const KItemListRubberBand *rubberBand = m_view->rubberBand();
1324     const QPointF startPos = rubberBand->startPosition();
1325     const QPointF endPos = rubberBand->endPosition();
1326     QRectF rubberBandRect = QRectF(startPos, endPos).normalized();
1327
1328     const bool scrollVertical = (m_view->scrollOrientation() == Qt::Vertical);
1329     if (scrollVertical) {
1330         rubberBandRect.translate(0, -m_view->scrollOffset());
1331     } else {
1332         rubberBandRect.translate(-m_view->scrollOffset(), 0);
1333     }
1334
1335     if (!m_oldSelection.isEmpty()) {
1336         // Clear the old selection that was available before the rubberband has
1337         // been activated in case if no Shift- or Control-key are pressed
1338         const bool shiftOrControlPressed = QApplication::keyboardModifiers() & Qt::ShiftModifier || QApplication::keyboardModifiers() & Qt::ControlModifier;
1339         if (!shiftOrControlPressed && !m_selectionMode) {
1340             m_oldSelection.clear();
1341         }
1342     }
1343
1344     KItemSet selectedItems;
1345
1346     // Select all visible items that intersect with the rubberband
1347     const auto widgets = m_view->visibleItemListWidgets();
1348     for (const KItemListWidget *widget : widgets) {
1349         const int index = widget->index();
1350
1351         const QRectF widgetRect = m_view->itemRect(index);
1352         if (widgetRect.intersects(rubberBandRect)) {
1353             // Select the full row intersecting with the rubberband rectangle
1354             const QRectF selectionRect = widget->selectionRect().translated(widgetRect.topLeft());
1355             const QRectF iconRect = widget->iconRect().translated(widgetRect.topLeft());
1356             if (selectionRect.intersects(rubberBandRect) || iconRect.intersects(rubberBandRect)) {
1357                 selectedItems.insert(index);
1358             }
1359         }
1360     }
1361
1362     // Select all invisible items that intersect with the rubberband. Instead of
1363     // iterating all items only the area which might be touched by the rubberband
1364     // will be checked.
1365     const bool increaseIndex = scrollVertical ? startPos.y() > endPos.y() : startPos.x() > endPos.x();
1366
1367     int index = increaseIndex ? m_view->lastVisibleIndex() + 1 : m_view->firstVisibleIndex() - 1;
1368     bool selectionFinished = false;
1369     do {
1370         const QRectF widgetRect = m_view->itemRect(index);
1371         if (widgetRect.intersects(rubberBandRect)) {
1372             selectedItems.insert(index);
1373         }
1374
1375         if (increaseIndex) {
1376             ++index;
1377             selectionFinished = (index >= m_model->count()) || (scrollVertical && widgetRect.top() > rubberBandRect.bottom())
1378                 || (!scrollVertical && widgetRect.left() > rubberBandRect.right());
1379         } else {
1380             --index;
1381             selectionFinished = (index < 0) || (scrollVertical && widgetRect.bottom() < rubberBandRect.top())
1382                 || (!scrollVertical && widgetRect.right() < rubberBandRect.left());
1383         }
1384     } while (!selectionFinished);
1385
1386     if ((QApplication::keyboardModifiers() & Qt::ControlModifier) || m_selectionMode) {
1387         // If Control is pressed, the selection state of all items in the rubberband is toggled.
1388         // Therefore, the new selection contains:
1389         // 1. All previously selected items which are not inside the rubberband, and
1390         // 2. all items inside the rubberband which have not been selected previously.
1391         m_selectionManager->setSelectedItems(m_oldSelection ^ selectedItems);
1392     } else {
1393         m_selectionManager->setSelectedItems(selectedItems + m_oldSelection);
1394     }
1395 }
1396
1397 void KItemListController::startDragging()
1398 {
1399     if (!m_view || !m_model) {
1400         return;
1401     }
1402
1403     const KItemSet selectedItems = m_selectionManager->selectedItems();
1404     if (selectedItems.isEmpty()) {
1405         return;
1406     }
1407
1408     QMimeData *data = m_model->createMimeData(selectedItems);
1409     if (!data) {
1410         return;
1411     }
1412     KUrlMimeData::exportUrlsToPortal(data);
1413
1414     // The created drag object will be owned and deleted
1415     // by QApplication::activeWindow().
1416     QDrag *drag = new QDrag(QApplication::activeWindow());
1417     drag->setMimeData(data);
1418
1419     const QPixmap pixmap = m_view->createDragPixmap(selectedItems);
1420     drag->setPixmap(pixmap);
1421
1422     const QPoint hotSpot((pixmap.width() / pixmap.devicePixelRatio()) / 2, 0);
1423     drag->setHotSpot(hotSpot);
1424
1425     drag->exec(Qt::MoveAction | Qt::CopyAction | Qt::LinkAction, Qt::CopyAction);
1426
1427     QAccessibleEvent accessibilityEvent(view(), QAccessible::DragDropStart);
1428     QAccessible::updateAccessibility(&accessibilityEvent);
1429 }
1430
1431 KItemListWidget *KItemListController::hoveredWidget() const
1432 {
1433     Q_ASSERT(m_view);
1434
1435     const auto widgets = m_view->visibleItemListWidgets();
1436     for (KItemListWidget *widget : widgets) {
1437         if (widget->isHovered()) {
1438             return widget;
1439         }
1440     }
1441
1442     return nullptr;
1443 }
1444
1445 KItemListWidget *KItemListController::widgetForPos(const QPointF &pos) const
1446 {
1447     Q_ASSERT(m_view);
1448
1449     if (m_view->headerBoundaries().contains(pos)) {
1450         return nullptr;
1451     }
1452
1453     const auto widgets = m_view->visibleItemListWidgets();
1454     for (KItemListWidget *widget : widgets) {
1455         const QPointF mappedPos = widget->mapFromItem(m_view, pos);
1456         if (widget->contains(mappedPos) || widget->selectionRect().contains(mappedPos)) {
1457             return widget;
1458         }
1459     }
1460
1461     return nullptr;
1462 }
1463
1464 KItemListWidget *KItemListController::widgetForDropPos(const QPointF &pos) const
1465 {
1466     Q_ASSERT(m_view);
1467
1468     if (m_view->headerBoundaries().contains(pos)) {
1469         return nullptr;
1470     }
1471
1472     const auto widgets = m_view->visibleItemListWidgets();
1473     for (KItemListWidget *widget : widgets) {
1474         const QPointF mappedPos = widget->mapFromItem(m_view, pos);
1475         if (widget->contains(mappedPos)) {
1476             return widget;
1477         }
1478     }
1479
1480     return nullptr;
1481 }
1482
1483 void KItemListController::updateKeyboardAnchor()
1484 {
1485     const bool validAnchor =
1486         m_keyboardAnchorIndex >= 0 && m_keyboardAnchorIndex < m_model->count() && keyboardAnchorPos(m_keyboardAnchorIndex) == m_keyboardAnchorPos;
1487     if (!validAnchor) {
1488         const int index = m_selectionManager->currentItem();
1489         m_keyboardAnchorIndex = index;
1490         m_keyboardAnchorPos = keyboardAnchorPos(index);
1491     }
1492 }
1493
1494 int KItemListController::nextRowIndex(int index) const
1495 {
1496     if (m_keyboardAnchorIndex < 0) {
1497         return index;
1498     }
1499
1500     const int maxIndex = m_model->count() - 1;
1501     if (index == maxIndex) {
1502         return index;
1503     }
1504
1505     const bool reversed = m_view->layoutDirection() == Qt::RightToLeft && m_view->scrollOrientation() == Qt::Vertical;
1506
1507     // Calculate the index of the last column inside the row of the current index
1508     int lastColumnIndex = index;
1509     while ((!reversed && keyboardAnchorPos(lastColumnIndex + 1) > keyboardAnchorPos(lastColumnIndex))
1510            || (reversed && keyboardAnchorPos(lastColumnIndex + 1) < keyboardAnchorPos(lastColumnIndex))) {
1511         ++lastColumnIndex;
1512         if (lastColumnIndex >= maxIndex) {
1513             return index;
1514         }
1515     }
1516
1517     // Based on the last column index go to the next row and calculate the nearest index
1518     // that is below the current index
1519     int nextRowIndex = lastColumnIndex + 1;
1520     int searchIndex = nextRowIndex;
1521     qreal minDiff = qAbs(m_keyboardAnchorPos - keyboardAnchorPos(nextRowIndex));
1522     while (searchIndex < maxIndex
1523            && ((!reversed && keyboardAnchorPos(searchIndex + 1) > keyboardAnchorPos(searchIndex))
1524                || (reversed && keyboardAnchorPos(searchIndex + 1) < keyboardAnchorPos(searchIndex)))) {
1525         ++searchIndex;
1526         const qreal searchDiff = qAbs(m_keyboardAnchorPos - keyboardAnchorPos(searchIndex));
1527         if (searchDiff < minDiff) {
1528             minDiff = searchDiff;
1529             nextRowIndex = searchIndex;
1530         }
1531     }
1532
1533     return nextRowIndex;
1534 }
1535
1536 int KItemListController::previousRowIndex(int index) const
1537 {
1538     if (m_keyboardAnchorIndex < 0 || index == 0) {
1539         return index;
1540     }
1541
1542     const bool reversed = m_view->layoutDirection() == Qt::RightToLeft && m_view->scrollOrientation() == Qt::Vertical;
1543
1544     // Calculate the index of the first column inside the row of the current index
1545     int firstColumnIndex = index;
1546     while ((!reversed && keyboardAnchorPos(firstColumnIndex - 1) < keyboardAnchorPos(firstColumnIndex))
1547            || (reversed && keyboardAnchorPos(firstColumnIndex - 1) > keyboardAnchorPos(firstColumnIndex))) {
1548         --firstColumnIndex;
1549         if (firstColumnIndex <= 0) {
1550             return index;
1551         }
1552     }
1553
1554     // Based on the first column index go to the previous row and calculate the nearest index
1555     // that is above the current index
1556     int previousRowIndex = firstColumnIndex - 1;
1557     int searchIndex = previousRowIndex;
1558     qreal minDiff = qAbs(m_keyboardAnchorPos - keyboardAnchorPos(previousRowIndex));
1559     while (searchIndex > 0
1560            && ((!reversed && keyboardAnchorPos(searchIndex - 1) < keyboardAnchorPos(searchIndex))
1561                || (reversed && keyboardAnchorPos(searchIndex - 1) > keyboardAnchorPos(searchIndex)))) {
1562         --searchIndex;
1563         const qreal searchDiff = qAbs(m_keyboardAnchorPos - keyboardAnchorPos(searchIndex));
1564         if (searchDiff < minDiff) {
1565             minDiff = searchDiff;
1566             previousRowIndex = searchIndex;
1567         }
1568     }
1569
1570     return previousRowIndex;
1571 }
1572
1573 qreal KItemListController::keyboardAnchorPos(int index) const
1574 {
1575     const QRectF itemRect = m_view->itemRect(index);
1576     if (!itemRect.isEmpty()) {
1577         return (m_view->scrollOrientation() == Qt::Vertical) ? itemRect.x() : itemRect.y();
1578     }
1579
1580     return 0;
1581 }
1582
1583 void KItemListController::updateExtendedSelectionRegion()
1584 {
1585     if (m_view) {
1586         const bool extend = (m_selectionBehavior != MultiSelection);
1587         KItemListStyleOption option = m_view->styleOption();
1588         if (option.extendedSelectionRegion != extend) {
1589             option.extendedSelectionRegion = extend;
1590             m_view->setStyleOption(option);
1591         }
1592     }
1593 }
1594
1595 bool KItemListController::onPress(const QPointF &pos, const Qt::KeyboardModifiers modifiers, const Qt::MouseButtons buttons)
1596 {
1597     Q_EMIT mouseButtonPressed(m_pressedIndex.value_or(-1), buttons);
1598
1599     if (buttons & (Qt::BackButton | Qt::ForwardButton)) {
1600         // Do not select items when clicking the back/forward buttons, see
1601         // https://bugs.kde.org/show_bug.cgi?id=327412.
1602         return true;
1603     }
1604
1605     const QPointF pressedMousePos = m_view->transform().map(pos);
1606
1607     if (m_view->isAboveExpansionToggle(m_pressedIndex.value_or(-1), pressedMousePos)) {
1608         m_selectionManager->endAnchoredSelection();
1609         m_selectionManager->setCurrentItem(m_pressedIndex.value());
1610         m_selectionManager->beginAnchoredSelection(m_pressedIndex.value());
1611         return true;
1612     }
1613
1614     m_selectionTogglePressed = m_view->isAboveSelectionToggle(m_pressedIndex.value_or(-1), pressedMousePos);
1615     if (m_selectionTogglePressed) {
1616         m_selectionManager->setSelected(m_pressedIndex.value(), 1, KItemListSelectionManager::Toggle);
1617         // The previous anchored selection has been finished already in
1618         // KItemListSelectionManager::setSelected(). We can safely change
1619         // the current item and start a new anchored selection now.
1620         m_selectionManager->setCurrentItem(m_pressedIndex.value());
1621         m_selectionManager->beginAnchoredSelection(m_pressedIndex.value());
1622         return true;
1623     }
1624
1625     const bool shiftPressed = modifiers & Qt::ShiftModifier;
1626     const bool controlPressed = (modifiers & Qt::ControlModifier) || m_selectionMode; // Keeping selectionMode similar to pressing control will hopefully
1627                                                                                       // simplify the overall logic and possibilities both for users and devs.
1628     const bool leftClick = buttons & Qt::LeftButton;
1629     const bool rightClick = buttons & Qt::RightButton;
1630
1631     // The previous selection is cleared if either
1632     // 1. The selection mode is SingleSelection, or
1633     // 2. the selection mode is MultiSelection, and *none* of the following conditions are met:
1634     //    a) Shift or Control are pressed.
1635     //    b) The clicked item is selected already. In that case, the user might want to:
1636     //       - start dragging multiple items, or
1637     //       - open the context menu and perform an action for all selected items.
1638     const bool shiftOrControlPressed = shiftPressed || controlPressed;
1639     const bool pressedItemAlreadySelected = m_pressedIndex.has_value() && m_selectionManager->isSelected(m_pressedIndex.value());
1640     const bool clearSelection = m_selectionBehavior == SingleSelection || (!shiftOrControlPressed && !pressedItemAlreadySelected);
1641
1642     // When this method returns false, a rubberBand selection is created using KItemListController::startRubberBand via the caller.
1643     if (clearSelection) {
1644         const int selectedItemsCount = m_selectionManager->selectedItems().count();
1645         m_selectionManager->clearSelection();
1646         // clear and bail when we got an existing multi-selection
1647         if (selectedItemsCount > 1 && m_pressedIndex.has_value()) {
1648             const auto row = m_view->m_visibleItems.value(m_pressedIndex.value());
1649             const auto mappedPos = row->mapFromItem(m_view, pos);
1650             if (pressedItemAlreadySelected || row->iconRect().contains(mappedPos) || row->textRect().contains(mappedPos)) {
1651                 // we are indeed inside the text/icon rect, keep m_pressedIndex what it is
1652                 // and short-circuit for single-click activation (it will then propagate to onRelease and activate the item)
1653                 // or we just keep going for double-click activation
1654                 if (m_view->style()->styleHint(QStyle::SH_ItemView_ActivateItemOnSingleClick) || m_singleClickActivationEnforced) {
1655                     if (!pressedItemAlreadySelected) {
1656                         // An unselected item was clicked directly while deselecting multiple other items so we select it.
1657                         m_selectionManager->setSelected(m_pressedIndex.value(), 1, KItemListSelectionManager::Toggle);
1658                         m_selectionManager->setCurrentItem(m_pressedIndex.value());
1659                         m_selectionManager->beginAnchoredSelection(m_pressedIndex.value());
1660                     }
1661                     return true; // event handled, don't create rubber band
1662                 }
1663             } else {
1664                 // we're not inside the text/icon rect, as we've already cleared the selection
1665                 // we can just stop here and make sure handlers down the line (i.e. onRelease) don't activate
1666                 m_pressedIndex.reset();
1667                 // we don't stop event propagation and proceed to create a rubber band and let onRelease
1668                 // decide (based on m_pressedIndex) whether we're in a drag (drag => new rubber band, click => don't select the item)
1669                 return false;
1670             }
1671         }
1672     } else if (pressedItemAlreadySelected && !shiftOrControlPressed && leftClick) {
1673         // The user might want to start dragging multiple items, but if he clicks the item
1674         // in order to trigger it instead, the other selected items must be deselected.
1675         // However, we do not know yet what the user is going to do.
1676         // -> remember that the user pressed an item which had been selected already and
1677         //    clear the selection in mouseReleaseEvent(), unless the items are dragged.
1678         m_clearSelectionIfItemsAreNotDragged = true;
1679
1680         if (m_selectionManager->selectedItems().count() == 1 && m_view->isAboveText(m_pressedIndex.value_or(-1), pressedMousePos)) {
1681             Q_EMIT selectedItemTextPressed(m_pressedIndex.value_or(-1));
1682         }
1683     }
1684
1685     if (!shiftPressed) {
1686         // Finish the anchored selection before the current index is changed
1687         m_selectionManager->endAnchoredSelection();
1688     }
1689
1690     if (rightClick) {
1691         // Stop rubber band from persisting after right-clicks
1692         KItemListRubberBand *rubberBand = m_view->rubberBand();
1693         if (rubberBand->isActive()) {
1694             disconnect(rubberBand, &KItemListRubberBand::endPositionChanged, this, &KItemListController::slotRubberBandChanged);
1695             rubberBand->setActive(false);
1696             m_view->setAutoScroll(false);
1697         }
1698     }
1699
1700     if (m_pressedIndex.has_value()) {
1701         // The hover highlight area of an item is being pressed.
1702         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
1703         const bool hitTargetIsRowEmptyRegion = !row->contains(row->mapFromItem(m_view, pos));
1704         // again, when this method returns false, a rubberBand selection is created as the event is not consumed;
1705         // createRubberBand here tells us whether to return true or false.
1706         bool createRubberBand = (hitTargetIsRowEmptyRegion && m_selectionManager->selectedItems().isEmpty());
1707
1708         if (rightClick && hitTargetIsRowEmptyRegion) {
1709             // We have a right click outside the icon and text rect but within the hover highlight area.
1710             // We don't want items to get selected through this, so we return now.
1711             return true;
1712         }
1713
1714         m_selectionManager->setCurrentItem(m_pressedIndex.value());
1715
1716         switch (m_selectionBehavior) {
1717         case NoSelection:
1718             break;
1719
1720         case SingleSelection:
1721             m_selectionManager->setSelected(m_pressedIndex.value());
1722             break;
1723
1724         case MultiSelection:
1725             if (controlPressed && !shiftPressed && leftClick) {
1726                 // A left mouse button press is happening on an item while control is pressed. This either means a user wants to:
1727                 // - toggle the selection of item(s) or
1728                 // - they want to begin a drag on the item(s) to copy them.
1729                 // We rule out the latter, if the item is not clicked directly and was unselected previously.
1730                 const auto row = m_view->m_visibleItems.value(m_pressedIndex.value());
1731                 const auto mappedPos = row->mapFromItem(m_view, pos);
1732                 if (!row->iconRect().contains(mappedPos) && !row->textRect().contains(mappedPos) && !pressedItemAlreadySelected) {
1733                     createRubberBand = true;
1734                 } else {
1735                     m_selectionManager->setSelected(m_pressedIndex.value(), 1, KItemListSelectionManager::Toggle);
1736                     m_selectionManager->beginAnchoredSelection(m_pressedIndex.value());
1737                     createRubberBand = false; // multi selection, don't propagate any further
1738                     // This will be the start of an item drag-to-copy operation if the user now moves the mouse before releasing the mouse button.
1739                 }
1740             } else if (!shiftPressed || !m_selectionManager->isAnchoredSelectionActive()) {
1741                 // Select the pressed item and start a new anchored selection
1742                 m_selectionManager->setSelected(m_pressedIndex.value(), 1, KItemListSelectionManager::Select);
1743                 m_selectionManager->beginAnchoredSelection(m_pressedIndex.value());
1744             }
1745             break;
1746
1747         default:
1748             Q_ASSERT(false);
1749             break;
1750         }
1751
1752         return !createRubberBand;
1753     }
1754
1755     return false;
1756 }
1757
1758 bool KItemListController::onRelease(const QPointF &pos, const Qt::KeyboardModifiers modifiers, const Qt::MouseButtons buttons, bool touch)
1759 {
1760     const QPointF pressedMousePos = pos;
1761     const bool isAboveSelectionToggle = m_view->isAboveSelectionToggle(m_pressedIndex.value_or(-1), pressedMousePos);
1762     if (isAboveSelectionToggle) {
1763         m_selectionTogglePressed = false;
1764         return true;
1765     }
1766
1767     if (!isAboveSelectionToggle && m_selectionTogglePressed) {
1768         m_selectionManager->setSelected(m_pressedIndex.value_or(-1), 1, KItemListSelectionManager::Toggle);
1769         m_selectionTogglePressed = false;
1770         return true;
1771     }
1772
1773     const bool controlPressed = modifiers & Qt::ControlModifier;
1774     const bool shiftOrControlPressed = modifiers & Qt::ShiftModifier || controlPressed;
1775
1776     const std::optional<int> index = m_view->itemAt(pos);
1777
1778     KItemListRubberBand *rubberBand = m_view->rubberBand();
1779     bool rubberBandRelease = false;
1780     if (rubberBand->isActive()) {
1781         disconnect(rubberBand, &KItemListRubberBand::endPositionChanged, this, &KItemListController::slotRubberBandChanged);
1782         rubberBand->setActive(false);
1783         m_oldSelection.clear();
1784         m_view->setAutoScroll(false);
1785         rubberBandRelease = true;
1786         // We check for actual rubber band drag here: if delta between start and end is less than drag threshold,
1787         // then we have a single click on one of the rows
1788         if ((rubberBand->endPosition() - rubberBand->startPosition()).manhattanLength() < QApplication::startDragDistance()) {
1789             rubberBandRelease = false; // since we're only selecting, unmark rubber band release flag
1790             // m_pressedIndex will have no value if we came from a multi-selection clearing onPress
1791             // in that case, we don't select anything
1792             if (index.has_value() && m_pressedIndex.has_value()) {
1793                 if (controlPressed && m_selectionBehavior == MultiSelection) {
1794                     m_selectionManager->setSelected(m_pressedIndex.value(), 1, KItemListSelectionManager::Toggle);
1795                 } else {
1796                     m_selectionManager->setSelected(index.value());
1797                 }
1798                 if (!m_selectionManager->isAnchoredSelectionActive()) {
1799                     m_selectionManager->beginAnchoredSelection(index.value());
1800                 }
1801             }
1802         }
1803     }
1804
1805     if (index.has_value() && index == m_pressedIndex) {
1806         // The release event is done above the same item as the press event
1807
1808         if (m_clearSelectionIfItemsAreNotDragged) {
1809             // A selected item has been clicked, but no drag operation has been started
1810             // -> clear the rest of the selection.
1811             m_selectionManager->clearSelection();
1812             m_selectionManager->setSelected(m_pressedIndex.value(), 1, KItemListSelectionManager::Select);
1813             m_selectionManager->beginAnchoredSelection(m_pressedIndex.value());
1814         }
1815
1816         if (buttons & Qt::LeftButton) {
1817             bool emitItemActivated = true;
1818             if (m_view->isAboveExpansionToggle(index.value(), pos)) {
1819                 const bool expanded = m_model->isExpanded(index.value());
1820                 m_model->setExpanded(index.value(), !expanded);
1821
1822                 Q_EMIT itemExpansionToggleClicked(index.value());
1823                 emitItemActivated = false;
1824             } else if (shiftOrControlPressed && m_selectionBehavior != SingleSelection) {
1825                 // The mouse click should only update the selection, not trigger the item, except when
1826                 // we are in single selection mode
1827                 emitItemActivated = false;
1828             } else {
1829                 const bool singleClickActivation = m_view->style()->styleHint(QStyle::SH_ItemView_ActivateItemOnSingleClick) || m_singleClickActivationEnforced;
1830                 if (!singleClickActivation) {
1831                     emitItemActivated = touch && !m_selectionMode;
1832                 } else {
1833                     // activate on single click only if we didn't come from a rubber band release
1834                     emitItemActivated = !rubberBandRelease;
1835                 }
1836             }
1837             if (emitItemActivated) {
1838                 Q_EMIT itemActivated(index.value());
1839             }
1840         } else if (buttons & Qt::MiddleButton) {
1841             Q_EMIT itemMiddleClicked(index.value());
1842         }
1843     }
1844
1845     m_pressedMouseGlobalPos = QPointF();
1846     m_pressedIndex = std::nullopt;
1847     m_clearSelectionIfItemsAreNotDragged = false;
1848     return false;
1849 }
1850
1851 void KItemListController::startRubberBand()
1852 {
1853     if (m_selectionBehavior == MultiSelection) {
1854         QPoint startPos = m_view->transform().map(m_view->scene()->views().first()->mapFromGlobal(m_pressedMouseGlobalPos.toPoint()));
1855         if (m_view->scrollOrientation() == Qt::Vertical) {
1856             startPos.ry() += m_view->scrollOffset();
1857         } else {
1858             startPos.rx() += m_view->scrollOffset();
1859         }
1860
1861         m_oldSelection = m_selectionManager->selectedItems();
1862         KItemListRubberBand *rubberBand = m_view->rubberBand();
1863         rubberBand->setStartPosition(startPos);
1864         rubberBand->setEndPosition(startPos);
1865         rubberBand->setActive(true);
1866         connect(rubberBand, &KItemListRubberBand::endPositionChanged, this, &KItemListController::slotRubberBandChanged);
1867         m_view->setAutoScroll(true);
1868     }
1869 }
1870
1871 void KItemListController::slotStateChanged(QScroller::State newState)
1872 {
1873     if (newState == QScroller::Scrolling) {
1874         m_scrollerIsScrolling = true;
1875     } else if (newState == QScroller::Inactive) {
1876         m_scrollerIsScrolling = false;
1877     }
1878 }
1879
1880 #include "moc_kitemlistcontroller.cpp"