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     // For right to left languages, exchange right and left arrow keys.
 299     if (m_view->layoutDirection() == Qt::RightToLeft) {
 300         switch (key) {
 301         case Qt::Key_Left:
 302             key = Qt::Key_Right;
 303             break;
 304         case Qt::Key_Right:
 305             key = Qt::Key_Left;
 306             break;
 307         default:
 308             break;
 309         }
 310     }
 311
 312     const bool selectSingleItem = m_selectionBehavior != NoSelection && itemCount == 1 && navigationPressed;
 313
 314     if (selectSingleItem) {
 315         const int current = m_selectionManager->currentItem();
 316         m_selectionManager->setSelected(current);
 317         return true;
 318     }
 319
 320     switch (key) {
 321     case Qt::Key_Home:
 322         index = 0;
 323         m_keyboardAnchorIndex = index;
 324         m_keyboardAnchorPos = keyboardAnchorPos(index);
 325         break;
 326
 327     case Qt::Key_End:
 328         index = itemCount - 1;
 329         m_keyboardAnchorIndex = index;
 330         m_keyboardAnchorPos = keyboardAnchorPos(index);
 331         break;
 332
 333     case Qt::Key_Left:
 334         if (index > 0) {
 335             const int expandedParentsCount = m_model->expandedParentsCount(index);
 336             if (expandedParentsCount == 0) {
 337                 --index;
 338             } else {
 339                 // Go to the parent of the current item.
 340                 do {
 341                     --index;
 342                 } while (index > 0 && m_model->expandedParentsCount(index) == expandedParentsCount);
 343             }
 344             m_keyboardAnchorIndex = index;
 345             m_keyboardAnchorPos = keyboardAnchorPos(index);
 346         }
 347         break;
 348
 349     case Qt::Key_Right:
 350         if (index < itemCount - 1) {
 351             ++index;
 352             m_keyboardAnchorIndex = index;
 353             m_keyboardAnchorPos = keyboardAnchorPos(index);
 354         }
 355         break;
 356
 357     case Qt::Key_Up:
 358         updateKeyboardAnchor();
 359         if (shiftPressed && !m_selectionManager->isAnchoredSelectionActive() && m_selectionManager->isSelected(index)) {
 360             m_selectionManager->beginAnchoredSelection(index);
 361         }
 362         index = previousRowIndex(index);
 363         break;
 364
 365     case Qt::Key_Down:
 366         updateKeyboardAnchor();
 367         if (shiftPressed && !m_selectionManager->isAnchoredSelectionActive() && m_selectionManager->isSelected(index)) {
 368             m_selectionManager->beginAnchoredSelection(index);
 369         }
 370         index = nextRowIndex(index);
 371         break;
 372
 373     case Qt::Key_PageUp:
 374         if (m_view->scrollOrientation() == Qt::Horizontal) {
 375             // The new current index should correspond to the first item in the current column.
 376             int newIndex = qMax(index - 1, 0);
 377             while (newIndex != index && m_view->itemRect(newIndex).topLeft().y() < m_view->itemRect(index).topLeft().y()) {
 378                 index = newIndex;
 379                 newIndex = qMax(index - 1, 0);
 380             }
 381             m_keyboardAnchorIndex = index;
 382             m_keyboardAnchorPos = keyboardAnchorPos(index);
 383         } else {
 384             const qreal currentItemBottom = m_view->itemRect(index).bottomLeft().y();
 385             const qreal height = m_view->geometry().height();
 386
 387             // The new current item should be the first item in the current
 388             // column whose itemRect's top coordinate is larger than targetY.
 389             const qreal targetY = currentItemBottom - height;
 390
 391             updateKeyboardAnchor();
 392             int newIndex = previousRowIndex(index);
 393             do {
 394                 index = newIndex;
 395                 updateKeyboardAnchor();
 396                 newIndex = previousRowIndex(index);
 397             } while (m_view->itemRect(newIndex).topLeft().y() > targetY && newIndex != index);
 398         }
 399         break;
 400
 401     case Qt::Key_PageDown:
 402         if (m_view->scrollOrientation() == Qt::Horizontal) {
 403             // The new current index should correspond to the last item in the current column.
 404             int newIndex = qMin(index + 1, m_model->count() - 1);
 405             while (newIndex != index && m_view->itemRect(newIndex).topLeft().y() > m_view->itemRect(index).topLeft().y()) {
 406                 index = newIndex;
 407                 newIndex = qMin(index + 1, m_model->count() - 1);
 408             }
 409             m_keyboardAnchorIndex = index;
 410             m_keyboardAnchorPos = keyboardAnchorPos(index);
 411         } else {
 412             const qreal currentItemTop = m_view->itemRect(index).topLeft().y();
 413             const qreal height = m_view->geometry().height();
 414
 415             // The new current item should be the last item in the current
 416             // column whose itemRect's bottom coordinate is smaller than targetY.
 417             const qreal targetY = currentItemTop + height;
 418
 419             updateKeyboardAnchor();
 420             int newIndex = nextRowIndex(index);
 421             do {
 422                 index = newIndex;
 423                 updateKeyboardAnchor();
 424                 newIndex = nextRowIndex(index);
 425             } while (m_view->itemRect(newIndex).bottomLeft().y() < targetY && newIndex != index);
 426         }
 427         break;
 428
 429     case Qt::Key_Enter:
 430     case Qt::Key_Return: {
 431         const KItemSet selectedItems = m_selectionManager->selectedItems();
 432         if (selectedItems.count() >= 2) {
 433             Q_EMIT itemsActivated(selectedItems);
 434         } else if (selectedItems.count() == 1) {
 435             Q_EMIT itemActivated(selectedItems.first());
 436         } else {
 437             Q_EMIT itemActivated(index);
 438         }
 439         break;
 440     }
 441
 442     case Qt::Key_Escape:
 443         if (m_selectionMode) {
 444             Q_EMIT selectionModeChangeRequested(false);
 445         } else if (m_selectionBehavior != SingleSelection) {
 446             m_selectionManager->clearSelection();
 447         }
 448         m_keyboardManager->cancelSearch();
 449         Q_EMIT escapePressed();
 450         break;
 451
 452     case Qt::Key_Space:
 453         if (m_selectionBehavior == MultiSelection) {
 454             if (controlPressed) {
 455                 // Toggle the selection state of the current item.
 456                 m_selectionManager->endAnchoredSelection();
 457                 m_selectionManager->setSelected(index, 1, KItemListSelectionManager::Toggle);
 458                 m_selectionManager->beginAnchoredSelection(index);
 459                 break;
 460             } else {
 461                 // Select the current item if it is not selected yet.
 462                 const int current = m_selectionManager->currentItem();
 463                 if (!m_selectionManager->isSelected(current)) {
 464                     m_selectionManager->setSelected(current);
 465                     break;
 466                 }
 467             }
 468         }
 469         Q_FALLTHROUGH(); // fall through to the default case and add the Space to the current search string.
 470     default:
 471         m_keyboardManager->addKeys(event->text());
 472         // Make sure unconsumed events get propagated up the chain. #302329
 473         event->ignore();
 474         return false;
 475     }
 476
 477     if (m_selectionManager->currentItem() != index) {
 478         switch (m_selectionBehavior) {
 479         case NoSelection:
 480             m_selectionManager->setCurrentItem(index);
 481             break;
 482
 483         case SingleSelection:
 484             m_selectionManager->setCurrentItem(index);
 485             m_selectionManager->clearSelection();
 486             m_selectionManager->setSelected(index, 1);
 487             break;
 488
 489         case MultiSelection:
 490             if (controlPressed) {
 491                 m_selectionManager->endAnchoredSelection();
 492             }
 493
 494             m_selectionManager->setCurrentItem(index);
 495
 496             if (!shiftOrControlPressed) {
 497                 m_selectionManager->clearSelection();
 498                 m_selectionManager->setSelected(index, 1);
 499             }
 500
 501             if (!shiftPressed) {
 502                 m_selectionManager->beginAnchoredSelection(index);
 503             }
 504             break;
 505         }
 506     }
 507
 508     if (navigationPressed) {
 509         m_view->scrollToItem(index);
 510     }
 511     return true;
 512 }
 513
 514 void KItemListController::slotChangeCurrentItem(const QString &text, bool searchFromNextItem)
 515 {
 516     if (!m_model || m_model->count() == 0) {
 517         return;
 518     }
 519     int index;
 520     if (searchFromNextItem) {
 521         const int currentIndex = m_selectionManager->currentItem();
 522         index = m_model->indexForKeyboardSearch(text, (currentIndex + 1) % m_model->count());
 523     } else {
 524         index = m_model->indexForKeyboardSearch(text, 0);
 525     }
 526     if (index >= 0) {
 527         m_selectionManager->setCurrentItem(index);
 528
 529         if (m_selectionBehavior != NoSelection) {
 530             m_selectionManager->replaceSelection(index);
 531             m_selectionManager->beginAnchoredSelection(index);
 532         }
 533
 534         m_view->scrollToItem(index, KItemListView::ViewItemPosition::Beginning);
 535     }
 536 }
 537
 538 void KItemListController::slotAutoActivationTimeout()
 539 {
 540     if (!m_model || !m_view) {
 541         return;
 542     }
 543
 544     const int index = m_autoActivationTimer->property("index").toInt();
 545     if (index < 0 || index >= m_model->count()) {
 546         return;
 547     }
 548
 549     /* m_view->isUnderMouse() fixes a bug in the Folder-View-Panel and in the
 550      * Places-Panel.
 551      *
 552      * Bug: When you drag a file onto a Folder-View-Item or a Places-Item and
 553      * then move away before the auto-activation timeout triggers, than the
 554      * item still becomes activated/expanded.
 555      *
 556      * See Bug 293200 and 305783
 557      */
 558     if (m_view->isUnderMouse()) {
 559         if (m_view->supportsItemExpanding() && m_model->isExpandable(index)) {
 560             const bool expanded = m_model->isExpanded(index);
 561             m_model->setExpanded(index, !expanded);
 562         } else if (m_autoActivationBehavior != ExpansionOnly) {
 563             Q_EMIT itemActivated(index);
 564         }
 565     }
 566 }
 567
 568 bool KItemListController::inputMethodEvent(QInputMethodEvent *event)
 569 {
 570     Q_UNUSED(event)
 571     return false;
 572 }
 573
 574 bool KItemListController::mousePressEvent(QGraphicsSceneMouseEvent *event, const QTransform &transform)
 575 {
 576     m_mousePress = true;
 577     m_pressedMouseGlobalPos = event->screenPos();
 578
 579     if (event->source() == Qt::MouseEventSynthesizedByQt && m_isTouchEvent) {
 580         return false;
 581     }
 582
 583     if (!m_view) {
 584         return false;
 585     }
 586
 587     const QPointF pressedMousePos = transform.map(event->pos());
 588     m_pressedIndex = m_view->itemAt(pressedMousePos);
 589
 590     const Qt::MouseButtons buttons = event->buttons();
 591
 592     if (!onPress(event->screenPos(), event->pos(), event->modifiers(), buttons)) {
 593         startRubberBand();
 594         return false;
 595     }
 596
 597     return true;
 598 }
 599
 600 bool KItemListController::mouseMoveEvent(QGraphicsSceneMouseEvent *event, const QTransform &transform)
 601 {
 602     if (!m_view) {
 603         return false;
 604     }
 605
 606     if (m_view->m_tapAndHoldIndicator->isActive()) {
 607         m_view->m_tapAndHoldIndicator->setActive(false);
 608     }
 609
 610     if (event->source() == Qt::MouseEventSynthesizedByQt && !m_dragActionOrRightClick && m_isTouchEvent) {
 611         return false;
 612     }
 613
 614     if (m_pressedIndex.has_value() && !m_view->rubberBand()->isActive()) {
 615         // Check whether a dragging should be started
 616         if (event->buttons() & Qt::LeftButton) {
 617             const auto distance = (event->screenPos() - m_pressedMouseGlobalPos).manhattanLength();
 618             if (distance >= QApplication::startDragDistance()) {
 619                 if (!m_selectionManager->isSelected(m_pressedIndex.value())) {
 620                     // Always assure that the dragged item gets selected. Usually this is already
 621                     // done on the mouse-press event, but when using the selection-toggle on a
 622                     // selected item the dragged item is not selected yet.
 623                     m_selectionManager->setSelected(m_pressedIndex.value(), 1, KItemListSelectionManager::Toggle);
 624                 } else {
 625                     // A selected item has been clicked to drag all selected items
 626                     // -> the selection should not be cleared when the mouse button is released.
 627                     m_clearSelectionIfItemsAreNotDragged = false;
 628                 }
 629                 startDragging();
 630                 m_mousePress = false;
 631             }
 632         }
 633     } else {
 634         KItemListRubberBand *rubberBand = m_view->rubberBand();
 635         if (rubberBand->isActive()) {
 636             QPointF endPos = transform.map(event->pos());
 637
 638             // Update the current item.
 639             const std::optional<int> newCurrent = m_view->itemAt(endPos);
 640             if (newCurrent.has_value()) {
 641                 // It's expected that the new current index is also the new anchor (bug 163451).
 642                 m_selectionManager->endAnchoredSelection();
 643                 m_selectionManager->setCurrentItem(newCurrent.value());
 644                 m_selectionManager->beginAnchoredSelection(newCurrent.value());
 645             }
 646
 647             if (m_view->scrollOrientation() == Qt::Vertical) {
 648                 endPos.ry() += m_view->scrollOffset();
 649             } else {
 650                 endPos.rx() += m_view->scrollOffset();
 651             }
 652             rubberBand->setEndPosition(endPos);
 653         }
 654     }
 655
 656     return false;
 657 }
 658
 659 bool KItemListController::mouseReleaseEvent(QGraphicsSceneMouseEvent *event, const QTransform &transform)
 660 {
 661     m_mousePress = false;
 662     m_isTouchEvent = false;
 663
 664     if (!m_view) {
 665         return false;
 666     }
 667
 668     if (m_view->m_tapAndHoldIndicator->isActive()) {
 669         m_view->m_tapAndHoldIndicator->setActive(false);
 670     }
 671
 672     KItemListRubberBand *rubberBand = m_view->rubberBand();
 673     if (event->source() == Qt::MouseEventSynthesizedByQt && !rubberBand->isActive() && m_isTouchEvent) {
 674         return false;
 675     }
 676
 677     Q_EMIT mouseButtonReleased(m_pressedIndex.value_or(-1), event->buttons());
 678
 679     return onRelease(transform.map(event->pos()), event->modifiers(), event->button(), false);
 680 }
 681
 682 bool KItemListController::mouseDoubleClickEvent(QGraphicsSceneMouseEvent *event, const QTransform &transform)
 683 {
 684     const QPointF pos = transform.map(event->pos());
 685     const std::optional<int> index = m_view->itemAt(pos);
 686
 687     // Expand item if desired - See Bug 295573
 688     if (m_mouseDoubleClickAction != ActivateItemOnly) {
 689         if (m_view && m_model && m_view->supportsItemExpanding() && m_model->isExpandable(index.value_or(-1))) {
 690             const bool expanded = m_model->isExpanded(index.value());
 691             m_model->setExpanded(index.value(), !expanded);
 692         }
 693     }
 694
 695     if (event->button() & Qt::RightButton) {
 696         return false;
 697     }
 698
 699     bool emitItemActivated = !(m_view->style()->styleHint(QStyle::SH_ItemView_ActivateItemOnSingleClick) || m_singleClickActivationEnforced)
 700         && (event->button() & Qt::LeftButton) && index.has_value() && index.value() < m_model->count();
 701     if (emitItemActivated) {
 702         Q_EMIT itemActivated(index.value());
 703     }
 704     return false;
 705 }
 706
 707 bool KItemListController::contextMenuEvent(QContextMenuEvent *event)
 708 {
 709     if (event->reason() == QContextMenuEvent::Keyboard) {
 710         // Emit the signal itemContextMenuRequested() if at least one item is selected.
 711         // Otherwise the signal viewContextMenuRequested() will be emitted.
 712         const KItemSet selectedItems = m_selectionManager->selectedItems();
 713         int index = -1;
 714         if (selectedItems.count() >= 2) {
 715             const int currentItemIndex = m_selectionManager->currentItem();
 716             index = selectedItems.contains(currentItemIndex) ? currentItemIndex : selectedItems.first();
 717         } else if (selectedItems.count() == 1) {
 718             index = selectedItems.first();
 719         }
 720
 721         if (index >= 0) {
 722             const QRectF contextRect = m_view->itemContextRect(index);
 723             const QPointF pos(m_view->scene()->views().first()->mapToGlobal(contextRect.bottomRight().toPoint()));
 724             Q_EMIT itemContextMenuRequested(index, pos);
 725         } else {
 726             Q_EMIT viewContextMenuRequested(event->globalPos());
 727         }
 728         return true;
 729     }
 730
 731     const auto pos = event->pos();
 732     const auto globalPos = event->globalPos();
 733
 734     if (m_view->headerBoundaries().contains(pos)) {
 735         Q_EMIT headerContextMenuRequested(globalPos);
 736         return true;
 737     }
 738
 739     const auto pressedItem = m_view->itemAt(pos);
 740     // We only open a context menu for the pressed item if it is selected.
 741     // 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.
 742     if (pressedItem && m_selectionManager->selectedItems().contains(pressedItem.value())) {
 743         // The selection rectangle for an item was clicked
 744         Q_EMIT itemContextMenuRequested(m_pressedIndex.value(), globalPos);
 745         return true;
 746     }
 747
 748     // Remove any hover highlights so the context menu doesn't look like it applies to a row.
 749     const auto widgets = m_view->visibleItemListWidgets();
 750     for (KItemListWidget *widget : widgets) {
 751         if (widget->isHovered()) {
 752             widget->setHovered(false);
 753             Q_EMIT itemUnhovered(widget->index());
 754         }
 755     }
 756     Q_EMIT viewContextMenuRequested(globalPos);
 757     return true;
 758 }
 759
 760 bool KItemListController::dragEnterEvent(QGraphicsSceneDragDropEvent *event, const QTransform &transform)
 761 {
 762     Q_UNUSED(event)
 763     Q_UNUSED(transform)
 764
 765     DragAndDropHelper::clearUrlListMatchesUrlCache();
 766
 767     return false;
 768 }
 769
 770 bool KItemListController::dragLeaveEvent(QGraphicsSceneDragDropEvent *event, const QTransform &transform)
 771 {
 772     Q_UNUSED(event)
 773     Q_UNUSED(transform)
 774
 775     m_autoActivationTimer->stop();
 776     m_view->setAutoScroll(false);
 777     m_view->hideDropIndicator();
 778
 779     KItemListWidget *widget = hoveredWidget();
 780     if (widget) {
 781         widget->setHovered(false);
 782         Q_EMIT itemUnhovered(widget->index());
 783     }
 784     return false;
 785 }
 786
 787 bool KItemListController::dragMoveEvent(QGraphicsSceneDragDropEvent *event, const QTransform &transform)
 788 {
 789     if (!m_model || !m_view) {
 790         return false;
 791     }
 792
 793     QUrl hoveredDir = m_model->directory();
 794     KItemListWidget *oldHoveredWidget = hoveredWidget();
 795
 796     const QPointF pos = transform.map(event->pos());
 797     KItemListWidget *newHoveredWidget = widgetForDropPos(pos);
 798     int index = -1;
 799
 800     if (oldHoveredWidget != newHoveredWidget) {
 801         m_autoActivationTimer->stop();
 802
 803         if (oldHoveredWidget) {
 804             oldHoveredWidget->setHovered(false);
 805             Q_EMIT itemUnhovered(oldHoveredWidget->index());
 806         }
 807     }
 808
 809     if (newHoveredWidget) {
 810         bool droppingBetweenItems = false;
 811         if (m_model->sortRole().isEmpty()) {
 812             // The model supports inserting items between other items.
 813             droppingBetweenItems = (m_view->showDropIndicator(pos) >= 0);
 814         }
 815
 816         index = newHoveredWidget->index();
 817
 818         if (m_model->isDir(index)) {
 819             hoveredDir = m_model->url(index);
 820         }
 821
 822         if (!droppingBetweenItems) {
 823             // Something has been dragged on an item.
 824             m_view->hideDropIndicator();
 825             if (!newHoveredWidget->isHovered()) {
 826                 newHoveredWidget->setHovered(true);
 827                 Q_EMIT itemHovered(index);
 828             }
 829
 830             if (!m_autoActivationTimer->isActive() && m_autoActivationTimer->interval() >= 0) {
 831                 m_autoActivationTimer->setProperty("index", index);
 832                 m_autoActivationTimer->start();
 833             }
 834         } else {
 835             m_autoActivationTimer->stop();
 836             if (newHoveredWidget && newHoveredWidget->isHovered()) {
 837                 newHoveredWidget->setHovered(false);
 838                 Q_EMIT itemUnhovered(index);
 839             }
 840         }
 841     } else {
 842         m_view->hideDropIndicator();
 843     }
 844
 845     if (DragAndDropHelper::urlListMatchesUrl(event->mimeData()->urls(), hoveredDir)) {
 846         event->setDropAction(Qt::IgnoreAction);
 847         event->ignore();
 848     } else {
 849         if (m_model->supportsDropping(index)) {
 850             event->setDropAction(event->proposedAction());
 851             event->accept();
 852         } else {
 853             event->setDropAction(Qt::IgnoreAction);
 854             event->ignore();
 855         }
 856     }
 857     return false;
 858 }
 859
 860 bool KItemListController::dropEvent(QGraphicsSceneDragDropEvent *event, const QTransform &transform)
 861 {
 862     if (!m_view) {
 863         return false;
 864     }
 865
 866     m_autoActivationTimer->stop();
 867     m_view->setAutoScroll(false);
 868
 869     const QPointF pos = transform.map(event->pos());
 870
 871     int dropAboveIndex = -1;
 872     if (m_model->sortRole().isEmpty()) {
 873         // The model supports inserting of items between other items.
 874         dropAboveIndex = m_view->showDropIndicator(pos);
 875     }
 876
 877     if (dropAboveIndex >= 0) {
 878         // Something has been dropped between two items.
 879         m_view->hideDropIndicator();
 880         Q_EMIT aboveItemDropEvent(dropAboveIndex, event);
 881     } else if (!event->mimeData()->hasFormat(m_model->blacklistItemDropEventMimeType())) {
 882         // Something has been dropped on an item or on an empty part of the view.
 883         const KItemListWidget *receivingWidget = widgetForDropPos(pos);
 884         if (receivingWidget) {
 885             Q_EMIT itemDropEvent(receivingWidget->index(), event);
 886         } else {
 887             Q_EMIT itemDropEvent(-1, event);
 888         }
 889     }
 890
 891     QAccessibleEvent accessibilityEvent(view(), QAccessible::DragDropEnd);
 892     QAccessible::updateAccessibility(&accessibilityEvent);
 893
 894     return true;
 895 }
 896
 897 bool KItemListController::hoverEnterEvent(QGraphicsSceneHoverEvent *event, const QTransform &transform)
 898 {
 899     Q_UNUSED(event)
 900     Q_UNUSED(transform)
 901     return false;
 902 }
 903
 904 bool KItemListController::hoverMoveEvent(QGraphicsSceneHoverEvent *event, const QTransform &transform)
 905 {
 906     Q_UNUSED(transform)
 907     if (!m_model || !m_view) {
 908         return false;
 909     }
 910
 911     // We identify the widget whose expansionArea had been hovered before this hoverMoveEvent() triggered.
 912     // we can't use hoveredWidget() here (it handles the icon+text rect, not the expansion rect)
 913     // like hoveredWidget(), we find the hovered widget for the expansion rect
 914     const auto visibleItemListWidgets = m_view->visibleItemListWidgets();
 915     const auto oldHoveredExpansionWidgetIterator = std::find_if(visibleItemListWidgets.begin(), visibleItemListWidgets.end(), [](auto &widget) {
 916         return widget->expansionAreaHovered();
 917     });
 918     const auto oldHoveredExpansionWidget =
 919         oldHoveredExpansionWidgetIterator == visibleItemListWidgets.end() ? std::nullopt : std::make_optional(*oldHoveredExpansionWidgetIterator);
 920
 921     const auto unhoverOldHoveredWidget = [&]() {
 922         if (auto oldHoveredWidget = hoveredWidget(); oldHoveredWidget) {
 923             // handle the text+icon one
 924             oldHoveredWidget->setHovered(false);
 925             Q_EMIT itemUnhovered(oldHoveredWidget->index());
 926         }
 927     };
 928
 929     const auto unhoverOldExpansionWidget = [&]() {
 930         if (oldHoveredExpansionWidget) {
 931             // then the expansion toggle
 932             (*oldHoveredExpansionWidget)->setExpansionAreaHovered(false);
 933         }
 934     };
 935
 936     const QPointF pos = transform.map(event->pos());
 937     if (KItemListWidget *newHoveredWidget = widgetForPos(pos); newHoveredWidget) {
 938         // something got hovered, work out which part and set hover for the appropriate widget
 939         const auto mappedPos = newHoveredWidget->mapFromItem(m_view, pos);
 940         const bool isOnExpansionToggle = newHoveredWidget->expansionToggleRect().contains(mappedPos);
 941
 942         if (isOnExpansionToggle) {
 943             // make sure we unhover the old one first if old!=new
 944             if (oldHoveredExpansionWidget && *oldHoveredExpansionWidget != newHoveredWidget) {
 945                 (*oldHoveredExpansionWidget)->setExpansionAreaHovered(false);
 946             }
 947             // 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)
 948             unhoverOldHoveredWidget();
 949
 950             newHoveredWidget->setExpansionAreaHovered(true);
 951         } else {
 952             // make sure we unhover the old one first if old!=new
 953             auto oldHoveredWidget = hoveredWidget();
 954             if (oldHoveredWidget && oldHoveredWidget != newHoveredWidget) {
 955                 oldHoveredWidget->setHovered(false);
 956                 Q_EMIT itemUnhovered(oldHoveredWidget->index());
 957             }
 958             // 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)
 959             unhoverOldExpansionWidget();
 960
 961             const bool isOverIconAndText = newHoveredWidget->iconRect().contains(mappedPos) || newHoveredWidget->textRect().contains(mappedPos);
 962             const bool hasMultipleSelection = m_selectionManager->selectedItems().count() > 1;
 963
 964             if (hasMultipleSelection && !isOverIconAndText) {
 965                 // In case we have multiple selections, clicking on any row will deselect the selection.
 966                 // So, as a visual cue for signalling that clicking anywhere won't select, but clear current highlights,
 967                 // we disable hover of the *row*(i.e. blank space to the right of the icon+text)
 968
 969                 // (no-op in this branch for masked hover)
 970             } else {
 971                 newHoveredWidget->setHoverPosition(mappedPos);
 972                 if (oldHoveredWidget != newHoveredWidget) {
 973                     newHoveredWidget->setHovered(true);
 974                     Q_EMIT itemHovered(newHoveredWidget->index());
 975                 }
 976             }
 977         }
 978     } else {
 979         // unhover any currently hovered expansion and text+icon widgets
 980         unhoverOldHoveredWidget();
 981         unhoverOldExpansionWidget();
 982     }
 983     return false;
 984 }
 985
 986 bool KItemListController::hoverLeaveEvent(QGraphicsSceneHoverEvent *event, const QTransform &transform)
 987 {
 988     Q_UNUSED(event)
 989     Q_UNUSED(transform)
 990
 991     m_mousePress = false;
 992     m_isTouchEvent = false;
 993
 994     if (!m_model || !m_view) {
 995         return false;
 996     }
 997
 998     const auto widgets = m_view->visibleItemListWidgets();
 999     for (KItemListWidget *widget : widgets) {
1000         if (widget->isHovered()) {
1001             widget->setHovered(false);
1002             Q_EMIT itemUnhovered(widget->index());
1003         }
1004     }
1005     return false;
1006 }
1007
1008 bool KItemListController::wheelEvent(QGraphicsSceneWheelEvent *event, const QTransform &transform)
1009 {
1010     Q_UNUSED(event)
1011     Q_UNUSED(transform)
1012     return false;
1013 }
1014
1015 bool KItemListController::resizeEvent(QGraphicsSceneResizeEvent *event, const QTransform &transform)
1016 {
1017     Q_UNUSED(event)
1018     Q_UNUSED(transform)
1019     return false;
1020 }
1021
1022 bool KItemListController::gestureEvent(QGestureEvent *event, const QTransform &transform)
1023 {
1024     if (!m_view) {
1025         return false;
1026     }
1027
1028     //you can touch on different views at the same time, but only one QWidget gets a mousePressEvent
1029     //we use this to get the right QWidget
1030     //the only exception is a tap gesture with state GestureStarted, we need to reset some variable
1031     if (!m_mousePress) {
1032         if (QGesture *tap = event->gesture(Qt::TapGesture)) {
1033             QTapGesture *tapGesture = static_cast<QTapGesture *>(tap);
1034             if (tapGesture->state() == Qt::GestureStarted) {
1035                 tapTriggered(tapGesture, transform);
1036             }
1037         }
1038         return false;
1039     }
1040
1041     bool accepted = false;
1042
1043     if (QGesture *tap = event->gesture(Qt::TapGesture)) {
1044         tapTriggered(static_cast<QTapGesture *>(tap), transform);
1045         accepted = true;
1046     }
1047     if (event->gesture(Qt::TapAndHoldGesture)) {
1048         tapAndHoldTriggered(event, transform);
1049         accepted = true;
1050     }
1051     if (event->gesture(Qt::PinchGesture)) {
1052         pinchTriggered(event, transform);
1053         accepted = true;
1054     }
1055     if (event->gesture(m_swipeGesture)) {
1056         swipeTriggered(event, transform);
1057         accepted = true;
1058     }
1059     if (event->gesture(m_twoFingerTapGesture)) {
1060         twoFingerTapTriggered(event, transform);
1061         accepted = true;
1062     }
1063     return accepted;
1064 }
1065
1066 bool KItemListController::touchBeginEvent(QTouchEvent *event, const QTransform &transform)
1067 {
1068     Q_UNUSED(event)
1069     Q_UNUSED(transform)
1070
1071     m_isTouchEvent = true;
1072     return false;
1073 }
1074
1075 void KItemListController::tapTriggered(QTapGesture *tap, const QTransform &transform)
1076 {
1077     static bool scrollerWasActive = false;
1078
1079     if (tap->state() == Qt::GestureStarted) {
1080         m_dragActionOrRightClick = false;
1081         m_isSwipeGesture = false;
1082         m_pinchGestureInProgress = false;
1083         scrollerWasActive = m_scrollerIsScrolling;
1084     }
1085
1086     if (tap->state() == Qt::GestureFinished) {
1087         m_mousePress = false;
1088
1089         //if at the moment of the gesture start the QScroller was active, the user made the tap
1090         //to stop the QScroller and not to tap on an item
1091         if (scrollerWasActive) {
1092             return;
1093         }
1094
1095         if (m_view->m_tapAndHoldIndicator->isActive()) {
1096             m_view->m_tapAndHoldIndicator->setActive(false);
1097         }
1098
1099         const QPointF pressedMousePos = transform.map(tap->position());
1100         m_pressedIndex = m_view->itemAt(pressedMousePos);
1101         if (m_dragActionOrRightClick) {
1102             m_dragActionOrRightClick = false;
1103         } else {
1104             onPress(m_pressedMouseGlobalPos.toPoint(), tap->position().toPoint(), Qt::NoModifier, Qt::LeftButton);
1105             onRelease(transform.map(tap->position()), Qt::NoModifier, Qt::LeftButton, true);
1106         }
1107         m_isTouchEvent = false;
1108     }
1109 }
1110
1111 void KItemListController::tapAndHoldTriggered(QGestureEvent *event, const QTransform &transform)
1112 {
1113     //the Qt TabAndHold gesture is triggerable with a mouse click, we don't want this
1114     if (!m_isTouchEvent) {
1115         return;
1116     }
1117
1118     const QTapAndHoldGesture *tap = static_cast<QTapAndHoldGesture *>(event->gesture(Qt::TapAndHoldGesture));
1119     if (tap->state() == Qt::GestureFinished) {
1120         //if a pinch gesture is in progress we don't want a TabAndHold gesture
1121         if (m_pinchGestureInProgress) {
1122             return;
1123         }
1124         const QPointF pressedMousePos = transform.map(event->mapToGraphicsScene(tap->position()));
1125         m_pressedIndex = m_view->itemAt(pressedMousePos);
1126         if (m_pressedIndex.has_value()) {
1127             if (!m_selectionManager->isSelected(m_pressedIndex.value())) {
1128                 m_selectionManager->clearSelection();
1129                 m_selectionManager->setSelected(m_pressedIndex.value());
1130             }
1131             if (!m_selectionMode) {
1132                 Q_EMIT selectionModeChangeRequested(true);
1133             }
1134         } else {
1135             m_selectionManager->clearSelection();
1136             startRubberBand();
1137         }
1138
1139         Q_EMIT scrollerStop();
1140
1141         m_view->m_tapAndHoldIndicator->setStartPosition(pressedMousePos);
1142         m_view->m_tapAndHoldIndicator->setActive(true);
1143
1144         m_dragActionOrRightClick = true;
1145     }
1146 }
1147
1148 void KItemListController::pinchTriggered(QGestureEvent *event, const QTransform &transform)
1149 {
1150     Q_UNUSED(transform)
1151
1152     const QPinchGesture *pinch = static_cast<QPinchGesture *>(event->gesture(Qt::PinchGesture));
1153     const qreal sensitivityModifier = 0.2;
1154     static qreal counter = 0;
1155
1156     if (pinch->state() == Qt::GestureStarted) {
1157         m_pinchGestureInProgress = true;
1158         counter = 0;
1159     }
1160     if (pinch->state() == Qt::GestureUpdated) {
1161         //if a swipe gesture was recognized or in progress, we don't want a pinch gesture to change the zoom
1162         if (m_isSwipeGesture) {
1163             return;
1164         }
1165         counter = counter + (pinch->scaleFactor() - 1);
1166         if (counter >= sensitivityModifier) {
1167             Q_EMIT increaseZoom();
1168             counter = 0;
1169         } else if (counter <= -sensitivityModifier) {
1170             Q_EMIT decreaseZoom();
1171             counter = 0;
1172         }
1173     }
1174 }
1175
1176 void KItemListController::swipeTriggered(QGestureEvent *event, const QTransform &transform)
1177 {
1178     Q_UNUSED(transform)
1179
1180     const KTwoFingerSwipe *swipe = static_cast<KTwoFingerSwipe *>(event->gesture(m_swipeGesture));
1181
1182     if (!swipe) {
1183         return;
1184     }
1185     if (swipe->state() == Qt::GestureStarted) {
1186         m_isSwipeGesture = true;
1187     }
1188
1189     if (swipe->state() == Qt::GestureCanceled) {
1190         m_isSwipeGesture = false;
1191     }
1192
1193     if (swipe->state() == Qt::GestureFinished) {
1194         Q_EMIT scrollerStop();
1195
1196         if (swipe->swipeAngle() <= 20 || swipe->swipeAngle() >= 340) {
1197             Q_EMIT mouseButtonPressed(m_pressedIndex.value_or(-1), Qt::BackButton);
1198         } else if (swipe->swipeAngle() <= 200 && swipe->swipeAngle() >= 160) {
1199             Q_EMIT mouseButtonPressed(m_pressedIndex.value_or(-1), Qt::ForwardButton);
1200         } else if (swipe->swipeAngle() <= 110 && swipe->swipeAngle() >= 60) {
1201             Q_EMIT swipeUp();
1202         }
1203         m_isSwipeGesture = true;
1204     }
1205 }
1206
1207 void KItemListController::twoFingerTapTriggered(QGestureEvent *event, const QTransform &transform)
1208 {
1209     const KTwoFingerTap *twoTap = static_cast<KTwoFingerTap *>(event->gesture(m_twoFingerTapGesture));
1210
1211     if (!twoTap) {
1212         return;
1213     }
1214
1215     if (twoTap->state() == Qt::GestureStarted) {
1216         const QPointF pressedMousePos = transform.map(twoTap->pos());
1217         m_pressedIndex = m_view->itemAt(pressedMousePos);
1218         if (m_pressedIndex.has_value()) {
1219             onPress(twoTap->screenPos().toPoint(), twoTap->pos().toPoint(), Qt::ControlModifier, Qt::LeftButton);
1220             onRelease(transform.map(twoTap->pos()), Qt::ControlModifier, Qt::LeftButton, false);
1221         }
1222     }
1223 }
1224
1225 bool KItemListController::processEvent(QEvent *event, const QTransform &transform)
1226 {
1227     if (!event) {
1228         return false;
1229     }
1230
1231     switch (event->type()) {
1232     case QEvent::KeyPress:
1233         return keyPressEvent(static_cast<QKeyEvent *>(event));
1234     case QEvent::InputMethod:
1235         return inputMethodEvent(static_cast<QInputMethodEvent *>(event));
1236     case QEvent::GraphicsSceneMousePress:
1237         return mousePressEvent(static_cast<QGraphicsSceneMouseEvent *>(event), QTransform());
1238     case QEvent::GraphicsSceneMouseMove:
1239         return mouseMoveEvent(static_cast<QGraphicsSceneMouseEvent *>(event), QTransform());
1240     case QEvent::GraphicsSceneMouseRelease:
1241         return mouseReleaseEvent(static_cast<QGraphicsSceneMouseEvent *>(event), QTransform());
1242     case QEvent::GraphicsSceneMouseDoubleClick:
1243         return mouseDoubleClickEvent(static_cast<QGraphicsSceneMouseEvent *>(event), QTransform());
1244     case QEvent::ContextMenu:
1245         return contextMenuEvent(static_cast<QContextMenuEvent *>(event));
1246     case QEvent::GraphicsSceneWheel:
1247         return wheelEvent(static_cast<QGraphicsSceneWheelEvent *>(event), QTransform());
1248     case QEvent::GraphicsSceneDragEnter:
1249         return dragEnterEvent(static_cast<QGraphicsSceneDragDropEvent *>(event), QTransform());
1250     case QEvent::GraphicsSceneDragLeave:
1251         return dragLeaveEvent(static_cast<QGraphicsSceneDragDropEvent *>(event), QTransform());
1252     case QEvent::GraphicsSceneDragMove:
1253         return dragMoveEvent(static_cast<QGraphicsSceneDragDropEvent *>(event), QTransform());
1254     case QEvent::GraphicsSceneDrop:
1255         return dropEvent(static_cast<QGraphicsSceneDragDropEvent *>(event), QTransform());
1256     case QEvent::GraphicsSceneHoverEnter:
1257         return hoverEnterEvent(static_cast<QGraphicsSceneHoverEvent *>(event), QTransform());
1258     case QEvent::GraphicsSceneHoverMove:
1259         return hoverMoveEvent(static_cast<QGraphicsSceneHoverEvent *>(event), QTransform());
1260     case QEvent::GraphicsSceneHoverLeave:
1261         return hoverLeaveEvent(static_cast<QGraphicsSceneHoverEvent *>(event), QTransform());
1262     case QEvent::GraphicsSceneResize:
1263         return resizeEvent(static_cast<QGraphicsSceneResizeEvent *>(event), transform);
1264     case QEvent::Gesture:
1265         return gestureEvent(static_cast<QGestureEvent *>(event), transform);
1266     case QEvent::TouchBegin:
1267         return touchBeginEvent(static_cast<QTouchEvent *>(event), transform);
1268     default:
1269         break;
1270     }
1271
1272     return false;
1273 }
1274
1275 void KItemListController::slotViewScrollOffsetChanged(qreal current, qreal previous)
1276 {
1277     if (!m_view) {
1278         return;
1279     }
1280
1281     KItemListRubberBand *rubberBand = m_view->rubberBand();
1282     if (rubberBand->isActive()) {
1283         const qreal diff = current - previous;
1284         // TODO: Ideally just QCursor::pos() should be used as
1285         // new end-position but it seems there is no easy way
1286         // to have something like QWidget::mapFromGlobal() for QGraphicsWidget
1287         // (... or I just missed an easy way to do the mapping)
1288         QPointF endPos = rubberBand->endPosition();
1289         if (m_view->scrollOrientation() == Qt::Vertical) {
1290             endPos.ry() += diff;
1291         } else {
1292             endPos.rx() += diff;
1293         }
1294
1295         rubberBand->setEndPosition(endPos);
1296     }
1297 }
1298
1299 void KItemListController::slotRubberBandChanged()
1300 {
1301     if (!m_view || !m_model || m_model->count() <= 0) {
1302         return;
1303     }
1304
1305     const KItemListRubberBand *rubberBand = m_view->rubberBand();
1306     const QPointF startPos = rubberBand->startPosition();
1307     const QPointF endPos = rubberBand->endPosition();
1308     QRectF rubberBandRect = QRectF(startPos, endPos).normalized();
1309
1310     const bool scrollVertical = (m_view->scrollOrientation() == Qt::Vertical);
1311     if (scrollVertical) {
1312         rubberBandRect.translate(0, -m_view->scrollOffset());
1313     } else {
1314         rubberBandRect.translate(-m_view->scrollOffset(), 0);
1315     }
1316
1317     if (!m_oldSelection.isEmpty()) {
1318         // Clear the old selection that was available before the rubberband has
1319         // been activated in case if no Shift- or Control-key are pressed
1320         const bool shiftOrControlPressed = QApplication::keyboardModifiers() & Qt::ShiftModifier || QApplication::keyboardModifiers() & Qt::ControlModifier;
1321         if (!shiftOrControlPressed && !m_selectionMode) {
1322             m_oldSelection.clear();
1323         }
1324     }
1325
1326     KItemSet selectedItems;
1327
1328     // Select all visible items that intersect with the rubberband
1329     const auto widgets = m_view->visibleItemListWidgets();
1330     for (const KItemListWidget *widget : widgets) {
1331         const int index = widget->index();
1332
1333         const QRectF widgetRect = m_view->itemRect(index);
1334         if (widgetRect.intersects(rubberBandRect)) {
1335             // Select the full row intersecting with the rubberband rectangle
1336             const QRectF selectionRect = widget->selectionRect().translated(widgetRect.topLeft());
1337             const QRectF iconRect = widget->iconRect().translated(widgetRect.topLeft());
1338             if (selectionRect.intersects(rubberBandRect) || iconRect.intersects(rubberBandRect)) {
1339                 selectedItems.insert(index);
1340             }
1341         }
1342     }
1343
1344     // Select all invisible items that intersect with the rubberband. Instead of
1345     // iterating all items only the area which might be touched by the rubberband
1346     // will be checked.
1347     const bool increaseIndex = scrollVertical ? startPos.y() > endPos.y() : startPos.x() > endPos.x();
1348
1349     int index = increaseIndex ? m_view->lastVisibleIndex() + 1 : m_view->firstVisibleIndex() - 1;
1350     bool selectionFinished = false;
1351     do {
1352         const QRectF widgetRect = m_view->itemRect(index);
1353         if (widgetRect.intersects(rubberBandRect)) {
1354             selectedItems.insert(index);
1355         }
1356
1357         if (increaseIndex) {
1358             ++index;
1359             selectionFinished = (index >= m_model->count()) || (scrollVertical && widgetRect.top() > rubberBandRect.bottom())
1360                 || (!scrollVertical && widgetRect.left() > rubberBandRect.right());
1361         } else {
1362             --index;
1363             selectionFinished = (index < 0) || (scrollVertical && widgetRect.bottom() < rubberBandRect.top())
1364                 || (!scrollVertical && widgetRect.right() < rubberBandRect.left());
1365         }
1366     } while (!selectionFinished);
1367
1368     if ((QApplication::keyboardModifiers() & Qt::ControlModifier) || m_selectionMode) {
1369         // If Control is pressed, the selection state of all items in the rubberband is toggled.
1370         // Therefore, the new selection contains:
1371         // 1. All previously selected items which are not inside the rubberband, and
1372         // 2. all items inside the rubberband which have not been selected previously.
1373         m_selectionManager->setSelectedItems(m_oldSelection ^ selectedItems);
1374     } else {
1375         m_selectionManager->setSelectedItems(selectedItems + m_oldSelection);
1376     }
1377 }
1378
1379 void KItemListController::startDragging()
1380 {
1381     if (!m_view || !m_model) {
1382         return;
1383     }
1384
1385     const KItemSet selectedItems = m_selectionManager->selectedItems();
1386     if (selectedItems.isEmpty()) {
1387         return;
1388     }
1389
1390     QMimeData *data = m_model->createMimeData(selectedItems);
1391     if (!data) {
1392         return;
1393     }
1394     KUrlMimeData::exportUrlsToPortal(data);
1395
1396     // The created drag object will be owned and deleted
1397     // by QApplication::activeWindow().
1398     QDrag *drag = new QDrag(QApplication::activeWindow());
1399     drag->setMimeData(data);
1400
1401     const QPixmap pixmap = m_view->createDragPixmap(selectedItems);
1402     drag->setPixmap(pixmap);
1403
1404     const QPoint hotSpot((pixmap.width() / pixmap.devicePixelRatio()) / 2, 0);
1405     drag->setHotSpot(hotSpot);
1406
1407     drag->exec(Qt::MoveAction | Qt::CopyAction | Qt::LinkAction, Qt::CopyAction);
1408
1409     QAccessibleEvent accessibilityEvent(view(), QAccessible::DragDropStart);
1410     QAccessible::updateAccessibility(&accessibilityEvent);
1411 }
1412
1413 KItemListWidget *KItemListController::hoveredWidget() const
1414 {
1415     Q_ASSERT(m_view);
1416
1417     const auto widgets = m_view->visibleItemListWidgets();
1418     for (KItemListWidget *widget : widgets) {
1419         if (widget->isHovered()) {
1420             return widget;
1421         }
1422     }
1423
1424     return nullptr;
1425 }
1426
1427 KItemListWidget *KItemListController::widgetForPos(const QPointF &pos) const
1428 {
1429     Q_ASSERT(m_view);
1430
1431     if (m_view->headerBoundaries().contains(pos)) {
1432         return nullptr;
1433     }
1434
1435     const auto widgets = m_view->visibleItemListWidgets();
1436     for (KItemListWidget *widget : widgets) {
1437         const QPointF mappedPos = widget->mapFromItem(m_view, pos);
1438         if (widget->contains(mappedPos) || widget->selectionRect().contains(mappedPos)) {
1439             return widget;
1440         }
1441     }
1442
1443     return nullptr;
1444 }
1445
1446 KItemListWidget *KItemListController::widgetForDropPos(const QPointF &pos) const
1447 {
1448     Q_ASSERT(m_view);
1449
1450     if (m_view->headerBoundaries().contains(pos)) {
1451         return nullptr;
1452     }
1453
1454     const auto widgets = m_view->visibleItemListWidgets();
1455     for (KItemListWidget *widget : widgets) {
1456         const QPointF mappedPos = widget->mapFromItem(m_view, pos);
1457         if (widget->contains(mappedPos)) {
1458             return widget;
1459         }
1460     }
1461
1462     return nullptr;
1463 }
1464
1465 void KItemListController::updateKeyboardAnchor()
1466 {
1467     const bool validAnchor =
1468         m_keyboardAnchorIndex >= 0 && m_keyboardAnchorIndex < m_model->count() && keyboardAnchorPos(m_keyboardAnchorIndex) == m_keyboardAnchorPos;
1469     if (!validAnchor) {
1470         const int index = m_selectionManager->currentItem();
1471         m_keyboardAnchorIndex = index;
1472         m_keyboardAnchorPos = keyboardAnchorPos(index);
1473     }
1474 }
1475
1476 int KItemListController::nextRowIndex(int index) const
1477 {
1478     if (m_keyboardAnchorIndex < 0) {
1479         return index;
1480     }
1481
1482     const int maxIndex = m_model->count() - 1;
1483     if (index == maxIndex) {
1484         return index;
1485     }
1486
1487     const bool leftToRight = m_view->layoutDirection() != Qt::RightToLeft;
1488
1489     // Calculate the index of the last column inside the row of the current index
1490     int lastColumnIndex = index;
1491     while ((leftToRight && keyboardAnchorPos(lastColumnIndex + 1) > keyboardAnchorPos(lastColumnIndex))
1492            || (!leftToRight && keyboardAnchorPos(lastColumnIndex + 1) < keyboardAnchorPos(lastColumnIndex))) {
1493         ++lastColumnIndex;
1494         if (lastColumnIndex >= maxIndex) {
1495             return index;
1496         }
1497     }
1498
1499     // Based on the last column index go to the next row and calculate the nearest index
1500     // that is below the current index
1501     int nextRowIndex = lastColumnIndex + 1;
1502     int searchIndex = nextRowIndex;
1503     qreal minDiff = qAbs(m_keyboardAnchorPos - keyboardAnchorPos(nextRowIndex));
1504     while (searchIndex < maxIndex
1505            && ((leftToRight && keyboardAnchorPos(searchIndex + 1) > keyboardAnchorPos(searchIndex))
1506                || (!leftToRight && keyboardAnchorPos(searchIndex + 1) < keyboardAnchorPos(searchIndex)))) {
1507         ++searchIndex;
1508         const qreal searchDiff = qAbs(m_keyboardAnchorPos - keyboardAnchorPos(searchIndex));
1509         if (searchDiff < minDiff) {
1510             minDiff = searchDiff;
1511             nextRowIndex = searchIndex;
1512         }
1513     }
1514
1515     return nextRowIndex;
1516 }
1517
1518 int KItemListController::previousRowIndex(int index) const
1519 {
1520     if (m_keyboardAnchorIndex < 0 || index == 0) {
1521         return index;
1522     }
1523
1524     const bool leftToRight = m_view->layoutDirection() != Qt::RightToLeft;
1525
1526     // Calculate the index of the first column inside the row of the current index
1527     int firstColumnIndex = index;
1528     while ((leftToRight && keyboardAnchorPos(firstColumnIndex - 1) < keyboardAnchorPos(firstColumnIndex))
1529            || (!leftToRight && keyboardAnchorPos(firstColumnIndex - 1) > keyboardAnchorPos(firstColumnIndex))) {
1530         --firstColumnIndex;
1531         if (firstColumnIndex <= 0) {
1532             return index;
1533         }
1534     }
1535
1536     // Based on the first column index go to the previous row and calculate the nearest index
1537     // that is above the current index
1538     int previousRowIndex = firstColumnIndex - 1;
1539     int searchIndex = previousRowIndex;
1540     qreal minDiff = qAbs(m_keyboardAnchorPos - keyboardAnchorPos(previousRowIndex));
1541     while (searchIndex > 0
1542            && ((leftToRight && keyboardAnchorPos(searchIndex - 1) < keyboardAnchorPos(searchIndex))
1543                || (!leftToRight && keyboardAnchorPos(searchIndex - 1) > keyboardAnchorPos(searchIndex)))) {
1544         --searchIndex;
1545         const qreal searchDiff = qAbs(m_keyboardAnchorPos - keyboardAnchorPos(searchIndex));
1546         if (searchDiff < minDiff) {
1547             minDiff = searchDiff;
1548             previousRowIndex = searchIndex;
1549         }
1550     }
1551
1552     return previousRowIndex;
1553 }
1554
1555 qreal KItemListController::keyboardAnchorPos(int index) const
1556 {
1557     const QRectF itemRect = m_view->itemRect(index);
1558     if (!itemRect.isEmpty()) {
1559         return (m_view->scrollOrientation() == Qt::Vertical) ? itemRect.x() : itemRect.y();
1560     }
1561
1562     return 0;
1563 }
1564
1565 void KItemListController::updateExtendedSelectionRegion()
1566 {
1567     if (m_view) {
1568         const bool extend = (m_selectionBehavior != MultiSelection);
1569         KItemListStyleOption option = m_view->styleOption();
1570         if (option.extendedSelectionRegion != extend) {
1571             option.extendedSelectionRegion = extend;
1572             m_view->setStyleOption(option);
1573         }
1574     }
1575 }
1576
1577 bool KItemListController::onPress(const QPoint &screenPos, const QPointF &pos, const Qt::KeyboardModifiers modifiers, const Qt::MouseButtons buttons)
1578 {
1579     Q_EMIT mouseButtonPressed(m_pressedIndex.value_or(-1), buttons);
1580
1581     if (buttons & (Qt::BackButton | Qt::ForwardButton)) {
1582         // Do not select items when clicking the back/forward buttons, see
1583         // https://bugs.kde.org/show_bug.cgi?id=327412.
1584         return true;
1585     }
1586
1587     const QPointF pressedMousePos = m_view->transform().map(pos);
1588
1589     if (m_view->isAboveExpansionToggle(m_pressedIndex.value_or(-1), pressedMousePos)) {
1590         m_selectionManager->endAnchoredSelection();
1591         m_selectionManager->setCurrentItem(m_pressedIndex.value());
1592         m_selectionManager->beginAnchoredSelection(m_pressedIndex.value());
1593         return true;
1594     }
1595
1596     m_selectionTogglePressed = m_view->isAboveSelectionToggle(m_pressedIndex.value_or(-1), pressedMousePos);
1597     if (m_selectionTogglePressed) {
1598         m_selectionManager->setSelected(m_pressedIndex.value(), 1, KItemListSelectionManager::Toggle);
1599         // The previous anchored selection has been finished already in
1600         // KItemListSelectionManager::setSelected(). We can safely change
1601         // the current item and start a new anchored selection now.
1602         m_selectionManager->setCurrentItem(m_pressedIndex.value());
1603         m_selectionManager->beginAnchoredSelection(m_pressedIndex.value());
1604         return true;
1605     }
1606
1607     const bool shiftPressed = modifiers & Qt::ShiftModifier;
1608     const bool controlPressed = (modifiers & Qt::ControlModifier) || m_selectionMode; // Keeping selectionMode similar to pressing control will hopefully
1609                                                                                       // simplify the overall logic and possibilities both for users and devs.
1610     const bool leftClick = buttons & Qt::LeftButton;
1611     const bool rightClick = buttons & Qt::RightButton;
1612
1613     // The previous selection is cleared if either
1614     // 1. The selection mode is SingleSelection, or
1615     // 2. the selection mode is MultiSelection, and *none* of the following conditions are met:
1616     //    a) Shift or Control are pressed.
1617     //    b) The clicked item is selected already. In that case, the user might want to:
1618     //       - start dragging multiple items, or
1619     //       - open the context menu and perform an action for all selected items.
1620     const bool shiftOrControlPressed = shiftPressed || controlPressed;
1621     const bool pressedItemAlreadySelected = m_pressedIndex.has_value() && m_selectionManager->isSelected(m_pressedIndex.value());
1622     const bool clearSelection = m_selectionBehavior == SingleSelection || (!shiftOrControlPressed && !pressedItemAlreadySelected);
1623
1624     // When this method returns false, a rubberBand selection is created using KItemListController::startRubberBand via the caller.
1625     if (clearSelection) {
1626         const int selectedItemsCount = m_selectionManager->selectedItems().count();
1627         m_selectionManager->clearSelection();
1628         // clear and bail when we got an existing multi-selection
1629         if (selectedItemsCount > 1 && m_pressedIndex.has_value()) {
1630             const auto row = m_view->m_visibleItems.value(m_pressedIndex.value());
1631             const auto mappedPos = row->mapFromItem(m_view, pos);
1632             if (pressedItemAlreadySelected || row->iconRect().contains(mappedPos) || row->textRect().contains(mappedPos)) {
1633                 // we are indeed inside the text/icon rect, keep m_pressedIndex what it is
1634                 // and short-circuit for single-click activation (it will then propagate to onRelease and activate the item)
1635                 // or we just keep going for double-click activation
1636                 if (m_view->style()->styleHint(QStyle::SH_ItemView_ActivateItemOnSingleClick) || m_singleClickActivationEnforced) {
1637                     if (!pressedItemAlreadySelected) {
1638                         // An unselected item was clicked directly while deselecting multiple other items so we select it.
1639                         m_selectionManager->setSelected(m_pressedIndex.value(), 1, KItemListSelectionManager::Toggle);
1640                         m_selectionManager->setCurrentItem(m_pressedIndex.value());
1641                         m_selectionManager->beginAnchoredSelection(m_pressedIndex.value());
1642                     }
1643                     return true; // event handled, don't create rubber band
1644                 }
1645             } else {
1646                 // we're not inside the text/icon rect, as we've already cleared the selection
1647                 // we can just stop here and make sure handlers down the line (i.e. onRelease) don't activate
1648                 m_pressedIndex.reset();
1649                 // we don't stop event propagation and proceed to create a rubber band and let onRelease
1650                 // decide (based on m_pressedIndex) whether we're in a drag (drag => new rubber band, click => don't select the item)
1651                 return false;
1652             }
1653         }
1654     } else if (pressedItemAlreadySelected && !shiftOrControlPressed && leftClick) {
1655         // The user might want to start dragging multiple items, but if he clicks the item
1656         // in order to trigger it instead, the other selected items must be deselected.
1657         // However, we do not know yet what the user is going to do.
1658         // -> remember that the user pressed an item which had been selected already and
1659         //    clear the selection in mouseReleaseEvent(), unless the items are dragged.
1660         m_clearSelectionIfItemsAreNotDragged = true;
1661
1662         if (m_selectionManager->selectedItems().count() == 1 && m_view->isAboveText(m_pressedIndex.value_or(-1), pressedMousePos)) {
1663             Q_EMIT selectedItemTextPressed(m_pressedIndex.value_or(-1));
1664         }
1665     }
1666
1667     if (!shiftPressed) {
1668         // Finish the anchored selection before the current index is changed
1669         m_selectionManager->endAnchoredSelection();
1670     }
1671
1672     if (rightClick) {
1673         // Stop rubber band from persisting after right-clicks
1674         KItemListRubberBand *rubberBand = m_view->rubberBand();
1675         if (rubberBand->isActive()) {
1676             disconnect(rubberBand, &KItemListRubberBand::endPositionChanged, this, &KItemListController::slotRubberBandChanged);
1677             rubberBand->setActive(false);
1678             m_view->setAutoScroll(false);
1679         }
1680     }
1681
1682     if (m_pressedIndex.has_value()) {
1683         // The hover highlight area of an item is being pressed.
1684         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
1685         const bool hitTargetIsRowEmptyRegion = !row->contains(row->mapFromItem(m_view, pos));
1686         // again, when this method returns false, a rubberBand selection is created as the event is not consumed;
1687         // createRubberBand here tells us whether to return true or false.
1688         bool createRubberBand = (hitTargetIsRowEmptyRegion && m_selectionManager->selectedItems().isEmpty());
1689
1690         if (rightClick && hitTargetIsRowEmptyRegion) {
1691             // We have a right click outside the icon and text rect but within the hover highlight area.
1692             // We don't want items to get selected through this, so we return now.
1693             return true;
1694         }
1695
1696         m_selectionManager->setCurrentItem(m_pressedIndex.value());
1697
1698         switch (m_selectionBehavior) {
1699         case NoSelection:
1700             break;
1701
1702         case SingleSelection:
1703             m_selectionManager->setSelected(m_pressedIndex.value());
1704             break;
1705
1706         case MultiSelection:
1707             if (controlPressed && !shiftPressed && leftClick) {
1708                 // A left mouse button press is happening on an item while control is pressed. This either means a user wants to:
1709                 // - toggle the selection of item(s) or
1710                 // - they want to begin a drag on the item(s) to copy them.
1711                 // We rule out the latter, if the item is not clicked directly and was unselected previously.
1712                 const auto row = m_view->m_visibleItems.value(m_pressedIndex.value());
1713                 const auto mappedPos = row->mapFromItem(m_view, pos);
1714                 if (!row->iconRect().contains(mappedPos) && !row->textRect().contains(mappedPos) && !pressedItemAlreadySelected) {
1715                     createRubberBand = true;
1716                 } else {
1717                     m_selectionManager->setSelected(m_pressedIndex.value(), 1, KItemListSelectionManager::Toggle);
1718                     m_selectionManager->beginAnchoredSelection(m_pressedIndex.value());
1719                     createRubberBand = false; // multi selection, don't propagate any further
1720                     // This will be the start of an item drag-to-copy operation if the user now moves the mouse before releasing the mouse button.
1721                 }
1722             } else if (!shiftPressed || !m_selectionManager->isAnchoredSelectionActive()) {
1723                 // Select the pressed item and start a new anchored selection
1724                 m_selectionManager->setSelected(m_pressedIndex.value(), 1, KItemListSelectionManager::Select);
1725                 m_selectionManager->beginAnchoredSelection(m_pressedIndex.value());
1726             }
1727             break;
1728
1729         default:
1730             Q_ASSERT(false);
1731             break;
1732         }
1733
1734         return !createRubberBand;
1735     }
1736
1737     return false;
1738 }
1739
1740 bool KItemListController::onRelease(const QPointF &pos, const Qt::KeyboardModifiers modifiers, const Qt::MouseButtons buttons, bool touch)
1741 {
1742     const QPointF pressedMousePos = pos;
1743     const bool isAboveSelectionToggle = m_view->isAboveSelectionToggle(m_pressedIndex.value_or(-1), pressedMousePos);
1744     if (isAboveSelectionToggle) {
1745         m_selectionTogglePressed = false;
1746         return true;
1747     }
1748
1749     if (!isAboveSelectionToggle && m_selectionTogglePressed) {
1750         m_selectionManager->setSelected(m_pressedIndex.value_or(-1), 1, KItemListSelectionManager::Toggle);
1751         m_selectionTogglePressed = false;
1752         return true;
1753     }
1754
1755     const bool controlPressed = modifiers & Qt::ControlModifier;
1756     const bool shiftOrControlPressed = modifiers & Qt::ShiftModifier || controlPressed;
1757
1758     const std::optional<int> index = m_view->itemAt(pos);
1759
1760     KItemListRubberBand *rubberBand = m_view->rubberBand();
1761     bool rubberBandRelease = false;
1762     if (rubberBand->isActive()) {
1763         disconnect(rubberBand, &KItemListRubberBand::endPositionChanged, this, &KItemListController::slotRubberBandChanged);
1764         rubberBand->setActive(false);
1765         m_oldSelection.clear();
1766         m_view->setAutoScroll(false);
1767         rubberBandRelease = true;
1768         // We check for actual rubber band drag here: if delta between start and end is less than drag threshold,
1769         // then we have a single click on one of the rows
1770         if ((rubberBand->endPosition() - rubberBand->startPosition()).manhattanLength() < QApplication::startDragDistance()) {
1771             rubberBandRelease = false; // since we're only selecting, unmark rubber band release flag
1772             // m_pressedIndex will have no value if we came from a multi-selection clearing onPress
1773             // in that case, we don't select anything
1774             if (index.has_value() && m_pressedIndex.has_value()) {
1775                 if (controlPressed && m_selectionBehavior == MultiSelection) {
1776                     m_selectionManager->setSelected(m_pressedIndex.value(), 1, KItemListSelectionManager::Toggle);
1777                 } else {
1778                     m_selectionManager->setSelected(index.value());
1779                 }
1780                 if (!m_selectionManager->isAnchoredSelectionActive()) {
1781                     m_selectionManager->beginAnchoredSelection(index.value());
1782                 }
1783             }
1784         }
1785     }
1786
1787     if (index.has_value() && index == m_pressedIndex) {
1788         // The release event is done above the same item as the press event
1789
1790         if (m_clearSelectionIfItemsAreNotDragged) {
1791             // A selected item has been clicked, but no drag operation has been started
1792             // -> clear the rest of the selection.
1793             m_selectionManager->clearSelection();
1794             m_selectionManager->setSelected(m_pressedIndex.value(), 1, KItemListSelectionManager::Select);
1795             m_selectionManager->beginAnchoredSelection(m_pressedIndex.value());
1796         }
1797
1798         if (buttons & Qt::LeftButton) {
1799             bool emitItemActivated = true;
1800             if (m_view->isAboveExpansionToggle(index.value(), pos)) {
1801                 const bool expanded = m_model->isExpanded(index.value());
1802                 m_model->setExpanded(index.value(), !expanded);
1803
1804                 Q_EMIT itemExpansionToggleClicked(index.value());
1805                 emitItemActivated = false;
1806             } else if (shiftOrControlPressed && m_selectionBehavior != SingleSelection) {
1807                 // The mouse click should only update the selection, not trigger the item, except when
1808                 // we are in single selection mode
1809                 emitItemActivated = false;
1810             } else {
1811                 const bool singleClickActivation = m_view->style()->styleHint(QStyle::SH_ItemView_ActivateItemOnSingleClick) || m_singleClickActivationEnforced;
1812                 if (!singleClickActivation) {
1813                     emitItemActivated = touch && !m_selectionMode;
1814                 } else {
1815                     // activate on single click only if we didn't come from a rubber band release
1816                     emitItemActivated = !rubberBandRelease;
1817                 }
1818             }
1819             if (emitItemActivated) {
1820                 Q_EMIT itemActivated(index.value());
1821             }
1822         } else if (buttons & Qt::MiddleButton) {
1823             Q_EMIT itemMiddleClicked(index.value());
1824         }
1825     }
1826
1827     m_pressedMouseGlobalPos = QPointF();
1828     m_pressedIndex = std::nullopt;
1829     m_clearSelectionIfItemsAreNotDragged = false;
1830     return false;
1831 }
1832
1833 void KItemListController::startRubberBand()
1834 {
1835     if (m_selectionBehavior == MultiSelection) {
1836         QPoint startPos = m_view->transform().map(m_view->scene()->views().first()->mapFromGlobal(m_pressedMouseGlobalPos.toPoint()));
1837         if (m_view->scrollOrientation() == Qt::Vertical) {
1838             startPos.ry() += m_view->scrollOffset();
1839         } else {
1840             startPos.rx() += m_view->scrollOffset();
1841         }
1842
1843         m_oldSelection = m_selectionManager->selectedItems();
1844         KItemListRubberBand *rubberBand = m_view->rubberBand();
1845         rubberBand->setStartPosition(startPos);
1846         rubberBand->setEndPosition(startPos);
1847         rubberBand->setActive(true);
1848         connect(rubberBand, &KItemListRubberBand::endPositionChanged, this, &KItemListController::slotRubberBandChanged);
1849         m_view->setAutoScroll(true);
1850     }
1851 }
1852
1853 void KItemListController::slotStateChanged(QScroller::State newState)
1854 {
1855     if (newState == QScroller::Scrolling) {
1856         m_scrollerIsScrolling = true;
1857     } else if (newState == QScroller::Inactive) {
1858         m_scrollerIsScrolling = false;
1859     }
1860 }
1861
1862 #include "moc_kitemlistcontroller.cpp"