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     if (event->button() & (Qt::ForwardButton | Qt::BackButton)) {
 704         // "Forward" and "Back" are reserved for quickly navigating through the
 705         // history. Double-clicking those buttons should be interpreted as two
 706         // separate button presses. We arrive here for the second click, which
 707         // we now react to just as we would for a singular click
 708         Q_EMIT mouseButtonPressed(index.value_or(-1), event->button());
 709         return false;
 710     }
 711
 712     if (!index.has_value()) {
 713         Q_EMIT doubleClickViewBackground(event->button());
 714         return false;
 715     }
 716
 717     // Expand item if desired - See Bug 295573
 718     if (m_mouseDoubleClickAction != ActivateItemOnly) {
 719         if (m_view && m_model && m_view->supportsItemExpanding() && m_model->isExpandable(index.value_or(-1))) {
 720             const bool expanded = m_model->isExpanded(index.value());
 721             m_model->setExpanded(index.value(), !expanded);
 722         }
 723     }
 724
 725     if (event->button() & ~Qt::LeftButton) {
 726         return false;
 727     }
 728
 729     if (m_view->style()->styleHint(QStyle::SH_ItemView_ActivateItemOnSingleClick) || m_singleClickActivationEnforced) {
 730         return false;
 731     }
 732
 733     const bool emitItemActivated = index.has_value() && index.value() < m_model->count() && !m_view->isAboveExpansionToggle(index.value(), pos);
 734     if (emitItemActivated) {
 735         if (!QApplication::keyboardModifiers()) {
 736             m_selectionManager->clearSelection(); // The user does not want to manage/manipulate the item currently, only activate it.
 737         }
 738         Q_EMIT itemActivated(index.value());
 739     }
 740     return false;
 741 }
 742
 743 bool KItemListController::contextMenuEvent(QContextMenuEvent *event)
 744 {
 745     if (event->reason() == QContextMenuEvent::Keyboard) {
 746         // Emit the signal itemContextMenuRequested() if at least one item is selected.
 747         // Otherwise the signal viewContextMenuRequested() will be emitted.
 748         const KItemSet selectedItems = m_selectionManager->selectedItems();
 749         int index = -1;
 750         if (selectedItems.count() >= 2) {
 751             const int currentItemIndex = m_selectionManager->currentItem();
 752             index = selectedItems.contains(currentItemIndex) ? currentItemIndex : selectedItems.first();
 753         } else if (selectedItems.count() == 1) {
 754             index = selectedItems.first();
 755         }
 756
 757         if (index >= 0) {
 758             const QRectF contextRect = m_view->itemContextRect(index);
 759             const QPointF pos(m_view->scene()->views().first()->mapToGlobal(contextRect.bottomRight().toPoint()));
 760             Q_EMIT itemContextMenuRequested(index, pos);
 761         } else {
 762             Q_EMIT viewContextMenuRequested(event->globalPos());
 763         }
 764         return true;
 765     }
 766
 767     const auto pos = event->pos();
 768     const auto globalPos = event->globalPos();
 769
 770     if (m_view->headerBoundaries().contains(pos)) {
 771         Q_EMIT headerContextMenuRequested(globalPos);
 772         return true;
 773     }
 774
 775     const auto pressedItem = m_view->itemAt(pos);
 776     // We only open a context menu for the pressed item if it is selected.
 777     // 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.
 778     if (pressedItem && m_selectionManager->selectedItems().contains(pressedItem.value())) {
 779         // The selection rectangle for an item was clicked
 780         Q_EMIT itemContextMenuRequested(pressedItem.value(), globalPos);
 781         return true;
 782     }
 783
 784     // Remove any hover highlights so the context menu doesn't look like it applies to a row.
 785     const auto widgets = m_view->visibleItemListWidgets();
 786     for (KItemListWidget *widget : widgets) {
 787         if (widget->isHovered()) {
 788             widget->setHovered(false);
 789             Q_EMIT itemUnhovered(widget->index());
 790         }
 791     }
 792     Q_EMIT viewContextMenuRequested(globalPos);
 793     return true;
 794 }
 795
 796 bool KItemListController::dragEnterEvent(QGraphicsSceneDragDropEvent *event, const QTransform &transform)
 797 {
 798     Q_UNUSED(event)
 799     Q_UNUSED(transform)
 800
 801     DragAndDropHelper::clearUrlListMatchesUrlCache();
 802
 803     return false;
 804 }
 805
 806 bool KItemListController::dragLeaveEvent(QGraphicsSceneDragDropEvent *event, const QTransform &transform)
 807 {
 808     Q_UNUSED(event)
 809     Q_UNUSED(transform)
 810
 811     m_autoActivationTimer->stop();
 812     m_view->setAutoScroll(false);
 813     m_view->hideDropIndicator();
 814
 815     KItemListWidget *widget = hoveredWidget();
 816     if (widget) {
 817         widget->setHovered(false);
 818         Q_EMIT itemUnhovered(widget->index());
 819     }
 820     return false;
 821 }
 822
 823 bool KItemListController::dragMoveEvent(QGraphicsSceneDragDropEvent *event, const QTransform &transform)
 824 {
 825     if (!m_model || !m_view) {
 826         return false;
 827     }
 828
 829     QUrl hoveredDir = m_model->directory();
 830     KItemListWidget *oldHoveredWidget = hoveredWidget();
 831
 832     const QPointF pos = transform.map(event->pos());
 833     KItemListWidget *newHoveredWidget = widgetForDropPos(pos);
 834     int index = -1;
 835
 836     if (oldHoveredWidget != newHoveredWidget) {
 837         m_autoActivationTimer->stop();
 838
 839         if (oldHoveredWidget) {
 840             oldHoveredWidget->setHovered(false);
 841             Q_EMIT itemUnhovered(oldHoveredWidget->index());
 842         }
 843     }
 844
 845     if (newHoveredWidget) {
 846         bool droppingBetweenItems = false;
 847         if (m_model->sortRole().isEmpty()) {
 848             // The model supports inserting items between other items.
 849             droppingBetweenItems = (m_view->showDropIndicator(pos) >= 0);
 850         }
 851
 852         index = newHoveredWidget->index();
 853
 854         if (m_model->isDir(index)) {
 855             hoveredDir = m_model->url(index);
 856         }
 857
 858         if (!droppingBetweenItems) {
 859             // Something has been dragged on an item.
 860             m_view->hideDropIndicator();
 861             if (!newHoveredWidget->isHovered()) {
 862                 newHoveredWidget->setHovered(true);
 863                 Q_EMIT itemHovered(index);
 864             }
 865
 866             if (!m_autoActivationTimer->isActive() && m_autoActivationTimer->interval() >= 0 && m_model->canEnterOnHover(index)) {
 867                 m_autoActivationTimer->setProperty("index", index);
 868                 m_autoActivationTimer->start();
 869                 newHoveredWidget->startActivateSoonAnimation(m_autoActivationTimer->remainingTime());
 870             }
 871
 872         } else {
 873             m_autoActivationTimer->stop();
 874             if (newHoveredWidget && newHoveredWidget->isHovered()) {
 875                 newHoveredWidget->setHovered(false);
 876                 Q_EMIT itemUnhovered(index);
 877             }
 878         }
 879     } else {
 880         m_view->hideDropIndicator();
 881     }
 882
 883     if (DragAndDropHelper::urlListMatchesUrl(event->mimeData()->urls(), hoveredDir)) {
 884         event->setDropAction(Qt::IgnoreAction);
 885         event->ignore();
 886     } else {
 887         if (m_model->supportsDropping(index)) {
 888             event->setDropAction(event->proposedAction());
 889             event->accept();
 890         } else {
 891             event->setDropAction(Qt::IgnoreAction);
 892             event->ignore();
 893         }
 894     }
 895     return false;
 896 }
 897
 898 bool KItemListController::dropEvent(QGraphicsSceneDragDropEvent *event, const QTransform &transform)
 899 {
 900     if (!m_view) {
 901         return false;
 902     }
 903
 904     m_autoActivationTimer->stop();
 905     m_view->setAutoScroll(false);
 906
 907     const QPointF pos = transform.map(event->pos());
 908
 909     int dropAboveIndex = -1;
 910     if (m_model->sortRole().isEmpty()) {
 911         // The model supports inserting of items between other items.
 912         dropAboveIndex = m_view->showDropIndicator(pos);
 913     }
 914
 915     if (dropAboveIndex >= 0) {
 916         // Something has been dropped between two items.
 917         m_view->hideDropIndicator();
 918         Q_EMIT aboveItemDropEvent(dropAboveIndex, event);
 919     } else if (!event->mimeData()->hasFormat(m_model->blacklistItemDropEventMimeType())) {
 920         // Something has been dropped on an item or on an empty part of the view.
 921         const KItemListWidget *receivingWidget = widgetForDropPos(pos);
 922         if (receivingWidget) {
 923             Q_EMIT itemDropEvent(receivingWidget->index(), event);
 924         } else {
 925             Q_EMIT itemDropEvent(-1, event);
 926         }
 927     }
 928
 929     QAccessibleEvent accessibilityEvent(view(), QAccessible::DragDropEnd);
 930     QAccessible::updateAccessibility(&accessibilityEvent);
 931
 932     return true;
 933 }
 934
 935 bool KItemListController::hoverEnterEvent(QGraphicsSceneHoverEvent *event, const QTransform &transform)
 936 {
 937     Q_UNUSED(event)
 938     Q_UNUSED(transform)
 939     return false;
 940 }
 941
 942 bool KItemListController::hoverMoveEvent(QGraphicsSceneHoverEvent *event, const QTransform &transform)
 943 {
 944     Q_UNUSED(transform)
 945     if (!m_model || !m_view) {
 946         return false;
 947     }
 948
 949     // We identify the widget whose expansionArea had been hovered before this hoverMoveEvent() triggered.
 950     // we can't use hoveredWidget() here (it handles the icon+text rect, not the expansion rect)
 951     // like hoveredWidget(), we find the hovered widget for the expansion rect
 952     const auto visibleItemListWidgets = m_view->visibleItemListWidgets();
 953     const auto oldHoveredExpansionWidgetIterator = std::find_if(visibleItemListWidgets.begin(), visibleItemListWidgets.end(), [](auto &widget) {
 954         return widget->expansionAreaHovered();
 955     });
 956     const auto oldHoveredExpansionWidget =
 957         oldHoveredExpansionWidgetIterator == visibleItemListWidgets.end() ? std::nullopt : std::make_optional(*oldHoveredExpansionWidgetIterator);
 958
 959     const auto unhoverOldHoveredWidget = [&]() {
 960         if (auto oldHoveredWidget = hoveredWidget(); oldHoveredWidget) {
 961             // handle the text+icon one
 962             oldHoveredWidget->setHovered(false);
 963             Q_EMIT itemUnhovered(oldHoveredWidget->index());
 964         }
 965     };
 966
 967     const auto unhoverOldExpansionWidget = [&]() {
 968         if (oldHoveredExpansionWidget) {
 969             // then the expansion toggle
 970             (*oldHoveredExpansionWidget)->setExpansionAreaHovered(false);
 971         }
 972     };
 973
 974     const QPointF pos = transform.map(event->pos());
 975     if (KItemListWidget *newHoveredWidget = widgetForPos(pos); newHoveredWidget) {
 976         // something got hovered, work out which part and set hover for the appropriate widget
 977         const auto mappedPos = newHoveredWidget->mapFromItem(m_view, pos);
 978         const bool isOnExpansionToggle = newHoveredWidget->expansionToggleRect().contains(mappedPos);
 979
 980         if (isOnExpansionToggle) {
 981             // make sure we unhover the old one first if old!=new
 982             if (oldHoveredExpansionWidget && *oldHoveredExpansionWidget != newHoveredWidget) {
 983                 (*oldHoveredExpansionWidget)->setExpansionAreaHovered(false);
 984             }
 985             // 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)
 986             unhoverOldHoveredWidget();
 987
 988             newHoveredWidget->setExpansionAreaHovered(true);
 989         } else {
 990             // make sure we unhover the old one first if old!=new
 991             auto oldHoveredWidget = hoveredWidget();
 992             if (oldHoveredWidget && oldHoveredWidget != newHoveredWidget) {
 993                 oldHoveredWidget->setHovered(false);
 994                 Q_EMIT itemUnhovered(oldHoveredWidget->index());
 995             }
 996             // 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)
 997             unhoverOldExpansionWidget();
 998
 999             const bool isOverIconAndText = newHoveredWidget->iconRect().contains(mappedPos) || newHoveredWidget->textRect().contains(mappedPos);
1000             const bool hasMultipleSelection = m_selectionManager->selectedItems().count() > 1;
1001
1002             if (hasMultipleSelection && !isOverIconAndText) {
1003                 // In case we have multiple selections, clicking on any row will deselect the selection.
1004                 // So, as a visual cue for signalling that clicking anywhere won't select, but clear current highlights,
1005                 // we disable hover of the *row*(i.e. blank space to the right of the icon+text)
1006
1007                 // (no-op in this branch for masked hover)
1008             } else {
1009                 newHoveredWidget->setHoverPosition(mappedPos);
1010                 if (oldHoveredWidget != newHoveredWidget) {
1011                     newHoveredWidget->setHovered(true);
1012                     Q_EMIT itemHovered(newHoveredWidget->index());
1013                 }
1014             }
1015         }
1016     } else {
1017         // unhover any currently hovered expansion and text+icon widgets
1018         unhoverOldHoveredWidget();
1019         unhoverOldExpansionWidget();
1020     }
1021     return false;
1022 }
1023
1024 bool KItemListController::hoverLeaveEvent(QGraphicsSceneHoverEvent *event, const QTransform &transform)
1025 {
1026     Q_UNUSED(event)
1027     Q_UNUSED(transform)
1028
1029     m_mousePress = false;
1030     m_isTouchEvent = false;
1031
1032     if (!m_model || !m_view) {
1033         return false;
1034     }
1035
1036     const auto widgets = m_view->visibleItemListWidgets();
1037     for (KItemListWidget *widget : widgets) {
1038         if (widget->isHovered()) {
1039             widget->setHovered(false);
1040             Q_EMIT itemUnhovered(widget->index());
1041         }
1042     }
1043     return false;
1044 }
1045
1046 bool KItemListController::wheelEvent(QGraphicsSceneWheelEvent *event, const QTransform &transform)
1047 {
1048     Q_UNUSED(event)
1049     Q_UNUSED(transform)
1050     return false;
1051 }
1052
1053 bool KItemListController::resizeEvent(QGraphicsSceneResizeEvent *event, const QTransform &transform)
1054 {
1055     Q_UNUSED(event)
1056     Q_UNUSED(transform)
1057     return false;
1058 }
1059
1060 bool KItemListController::gestureEvent(QGestureEvent *event, const QTransform &transform)
1061 {
1062     if (!m_view) {
1063         return false;
1064     }
1065
1066     //you can touch on different views at the same time, but only one QWidget gets a mousePressEvent
1067     //we use this to get the right QWidget
1068     //the only exception is a tap gesture with state GestureStarted, we need to reset some variable
1069     if (!m_mousePress) {
1070         if (QGesture *tap = event->gesture(Qt::TapGesture)) {
1071             QTapGesture *tapGesture = static_cast<QTapGesture *>(tap);
1072             if (tapGesture->state() == Qt::GestureStarted) {
1073                 tapTriggered(tapGesture, transform);
1074             }
1075         }
1076         return false;
1077     }
1078
1079     bool accepted = false;
1080
1081     if (QGesture *tap = event->gesture(Qt::TapGesture)) {
1082         tapTriggered(static_cast<QTapGesture *>(tap), transform);
1083         accepted = true;
1084     }
1085     if (event->gesture(Qt::TapAndHoldGesture)) {
1086         tapAndHoldTriggered(event, transform);
1087         accepted = true;
1088     }
1089     if (event->gesture(Qt::PinchGesture)) {
1090         pinchTriggered(event, transform);
1091         accepted = true;
1092     }
1093     if (event->gesture(m_swipeGesture)) {
1094         swipeTriggered(event, transform);
1095         accepted = true;
1096     }
1097     if (event->gesture(m_twoFingerTapGesture)) {
1098         twoFingerTapTriggered(event, transform);
1099         accepted = true;
1100     }
1101     return accepted;
1102 }
1103
1104 bool KItemListController::touchBeginEvent(QTouchEvent *event, const QTransform &transform)
1105 {
1106     Q_UNUSED(event)
1107     Q_UNUSED(transform)
1108
1109     m_isTouchEvent = true;
1110     return false;
1111 }
1112
1113 void KItemListController::tapTriggered(QTapGesture *tap, const QTransform &transform)
1114 {
1115     static bool scrollerWasActive = false;
1116
1117     if (tap->state() == Qt::GestureStarted) {
1118         m_dragActionOrRightClick = false;
1119         m_isSwipeGesture = false;
1120         m_pinchGestureInProgress = false;
1121         scrollerWasActive = m_scrollerIsScrolling;
1122     }
1123
1124     if (tap->state() == Qt::GestureFinished) {
1125         m_mousePress = false;
1126
1127         //if at the moment of the gesture start the QScroller was active, the user made the tap
1128         //to stop the QScroller and not to tap on an item
1129         if (scrollerWasActive) {
1130             return;
1131         }
1132
1133         if (m_view->m_tapAndHoldIndicator->isActive()) {
1134             m_view->m_tapAndHoldIndicator->setActive(false);
1135         }
1136
1137         const QPointF pressedMousePos = transform.map(tap->position());
1138         m_pressedIndex = m_view->itemAt(pressedMousePos);
1139         if (m_dragActionOrRightClick) {
1140             m_dragActionOrRightClick = false;
1141         } else {
1142             onPress(tap->position().toPoint(), Qt::NoModifier, Qt::LeftButton);
1143             onRelease(transform.map(tap->position()), Qt::NoModifier, Qt::LeftButton, true);
1144         }
1145         m_isTouchEvent = false;
1146     }
1147 }
1148
1149 void KItemListController::tapAndHoldTriggered(QGestureEvent *event, const QTransform &transform)
1150 {
1151     //the Qt TabAndHold gesture is triggerable with a mouse click, we don't want this
1152     if (!m_isTouchEvent) {
1153         return;
1154     }
1155
1156     const QTapAndHoldGesture *tap = static_cast<QTapAndHoldGesture *>(event->gesture(Qt::TapAndHoldGesture));
1157     if (tap->state() == Qt::GestureFinished) {
1158         //if a pinch gesture is in progress we don't want a TabAndHold gesture
1159         if (m_pinchGestureInProgress) {
1160             return;
1161         }
1162         const QPointF pressedMousePos = transform.map(event->mapToGraphicsScene(tap->position()));
1163         m_pressedIndex = m_view->itemAt(pressedMousePos);
1164         if (m_pressedIndex.has_value()) {
1165             if (!m_selectionManager->isSelected(m_pressedIndex.value())) {
1166                 m_selectionManager->clearSelection();
1167                 m_selectionManager->setSelected(m_pressedIndex.value());
1168             }
1169             if (!m_selectionMode) {
1170                 Q_EMIT selectionModeChangeRequested(true);
1171             }
1172         } else {
1173             m_selectionManager->clearSelection();
1174             startRubberBand();
1175         }
1176
1177         Q_EMIT scrollerStop();
1178
1179         m_view->m_tapAndHoldIndicator->setStartPosition(pressedMousePos);
1180         m_view->m_tapAndHoldIndicator->setActive(true);
1181
1182         m_dragActionOrRightClick = true;
1183     }
1184 }
1185
1186 void KItemListController::pinchTriggered(QGestureEvent *event, const QTransform &transform)
1187 {
1188     Q_UNUSED(transform)
1189
1190     const QPinchGesture *pinch = static_cast<QPinchGesture *>(event->gesture(Qt::PinchGesture));
1191     const qreal sensitivityModifier = 0.2;
1192     static qreal counter = 0;
1193
1194     if (pinch->state() == Qt::GestureStarted) {
1195         m_pinchGestureInProgress = true;
1196         counter = 0;
1197     }
1198     if (pinch->state() == Qt::GestureUpdated) {
1199         //if a swipe gesture was recognized or in progress, we don't want a pinch gesture to change the zoom
1200         if (m_isSwipeGesture) {
1201             return;
1202         }
1203         counter = counter + (pinch->scaleFactor() - 1);
1204         if (counter >= sensitivityModifier) {
1205             Q_EMIT increaseZoom();
1206             counter = 0;
1207         } else if (counter <= -sensitivityModifier) {
1208             Q_EMIT decreaseZoom();
1209             counter = 0;
1210         }
1211     }
1212 }
1213
1214 void KItemListController::swipeTriggered(QGestureEvent *event, const QTransform &transform)
1215 {
1216     Q_UNUSED(transform)
1217
1218     const KTwoFingerSwipe *swipe = static_cast<KTwoFingerSwipe *>(event->gesture(m_swipeGesture));
1219
1220     if (!swipe) {
1221         return;
1222     }
1223     if (swipe->state() == Qt::GestureStarted) {
1224         m_isSwipeGesture = true;
1225     }
1226
1227     if (swipe->state() == Qt::GestureCanceled) {
1228         m_isSwipeGesture = false;
1229     }
1230
1231     if (swipe->state() == Qt::GestureFinished) {
1232         Q_EMIT scrollerStop();
1233
1234         if (swipe->swipeAngle() <= 20 || swipe->swipeAngle() >= 340) {
1235             Q_EMIT mouseButtonPressed(m_pressedIndex.value_or(-1), Qt::BackButton);
1236         } else if (swipe->swipeAngle() <= 200 && swipe->swipeAngle() >= 160) {
1237             Q_EMIT mouseButtonPressed(m_pressedIndex.value_or(-1), Qt::ForwardButton);
1238         } else if (swipe->swipeAngle() <= 110 && swipe->swipeAngle() >= 60) {
1239             Q_EMIT swipeUp();
1240         }
1241         m_isSwipeGesture = true;
1242     }
1243 }
1244
1245 void KItemListController::twoFingerTapTriggered(QGestureEvent *event, const QTransform &transform)
1246 {
1247     const KTwoFingerTap *twoTap = static_cast<KTwoFingerTap *>(event->gesture(m_twoFingerTapGesture));
1248
1249     if (!twoTap) {
1250         return;
1251     }
1252
1253     if (twoTap->state() == Qt::GestureStarted) {
1254         const QPointF pressedMousePos = transform.map(twoTap->pos());
1255         m_pressedIndex = m_view->itemAt(pressedMousePos);
1256         if (m_pressedIndex.has_value()) {
1257             onPress(twoTap->pos().toPoint(), Qt::ControlModifier, Qt::LeftButton);
1258             onRelease(transform.map(twoTap->pos()), Qt::ControlModifier, Qt::LeftButton, false);
1259         }
1260     }
1261 }
1262
1263 bool KItemListController::processEvent(QEvent *event, const QTransform &transform)
1264 {
1265     if (!event) {
1266         return false;
1267     }
1268
1269     switch (event->type()) {
1270     case QEvent::KeyPress:
1271         return keyPressEvent(static_cast<QKeyEvent *>(event));
1272     case QEvent::InputMethod:
1273         return inputMethodEvent(static_cast<QInputMethodEvent *>(event));
1274     case QEvent::GraphicsSceneMousePress:
1275         return mousePressEvent(static_cast<QGraphicsSceneMouseEvent *>(event), QTransform());
1276     case QEvent::GraphicsSceneMouseMove:
1277         return mouseMoveEvent(static_cast<QGraphicsSceneMouseEvent *>(event), QTransform());
1278     case QEvent::GraphicsSceneMouseRelease:
1279         return mouseReleaseEvent(static_cast<QGraphicsSceneMouseEvent *>(event), QTransform());
1280     case QEvent::GraphicsSceneMouseDoubleClick:
1281         return mouseDoubleClickEvent(static_cast<QGraphicsSceneMouseEvent *>(event), QTransform());
1282     case QEvent::ContextMenu:
1283         return contextMenuEvent(static_cast<QContextMenuEvent *>(event));
1284     case QEvent::GraphicsSceneWheel:
1285         return wheelEvent(static_cast<QGraphicsSceneWheelEvent *>(event), QTransform());
1286     case QEvent::GraphicsSceneDragEnter:
1287         return dragEnterEvent(static_cast<QGraphicsSceneDragDropEvent *>(event), QTransform());
1288     case QEvent::GraphicsSceneDragLeave:
1289         return dragLeaveEvent(static_cast<QGraphicsSceneDragDropEvent *>(event), QTransform());
1290     case QEvent::GraphicsSceneDragMove:
1291         return dragMoveEvent(static_cast<QGraphicsSceneDragDropEvent *>(event), QTransform());
1292     case QEvent::GraphicsSceneDrop:
1293         return dropEvent(static_cast<QGraphicsSceneDragDropEvent *>(event), QTransform());
1294     case QEvent::GraphicsSceneHoverEnter:
1295         return hoverEnterEvent(static_cast<QGraphicsSceneHoverEvent *>(event), QTransform());
1296     case QEvent::GraphicsSceneHoverMove:
1297         return hoverMoveEvent(static_cast<QGraphicsSceneHoverEvent *>(event), QTransform());
1298     case QEvent::GraphicsSceneHoverLeave:
1299         return hoverLeaveEvent(static_cast<QGraphicsSceneHoverEvent *>(event), QTransform());
1300     case QEvent::GraphicsSceneResize:
1301         return resizeEvent(static_cast<QGraphicsSceneResizeEvent *>(event), transform);
1302     case QEvent::Gesture:
1303         return gestureEvent(static_cast<QGestureEvent *>(event), transform);
1304     case QEvent::TouchBegin:
1305         return touchBeginEvent(static_cast<QTouchEvent *>(event), transform);
1306     default:
1307         break;
1308     }
1309
1310     return false;
1311 }
1312
1313 void KItemListController::slotViewScrollOffsetChanged(qreal current, qreal previous)
1314 {
1315     if (!m_view) {
1316         return;
1317     }
1318
1319     KItemListRubberBand *rubberBand = m_view->rubberBand();
1320     if (rubberBand->isActive()) {
1321         const qreal diff = current - previous;
1322         // TODO: Ideally just QCursor::pos() should be used as
1323         // new end-position but it seems there is no easy way
1324         // to have something like QWidget::mapFromGlobal() for QGraphicsWidget
1325         // (... or I just missed an easy way to do the mapping)
1326         QPointF endPos = rubberBand->endPosition();
1327         if (m_view->scrollOrientation() == Qt::Vertical) {
1328             endPos.ry() += diff;
1329         } else {
1330             endPos.rx() += diff;
1331         }
1332
1333         rubberBand->setEndPosition(endPos);
1334     }
1335 }
1336
1337 void KItemListController::slotRubberBandChanged()
1338 {
1339     if (!m_view || !m_model || m_model->count() <= 0) {
1340         return;
1341     }
1342
1343     const KItemListRubberBand *rubberBand = m_view->rubberBand();
1344     const QPointF startPos = rubberBand->startPosition();
1345     const QPointF endPos = rubberBand->endPosition();
1346     QRectF rubberBandRect = QRectF(startPos, endPos).normalized();
1347
1348     const bool scrollVertical = (m_view->scrollOrientation() == Qt::Vertical);
1349     if (scrollVertical) {
1350         rubberBandRect.translate(0, -m_view->scrollOffset());
1351     } else {
1352         rubberBandRect.translate(-m_view->scrollOffset(), 0);
1353     }
1354
1355     if (!m_oldSelection.isEmpty()) {
1356         // Clear the old selection that was available before the rubberband has
1357         // been activated in case if no Shift- or Control-key are pressed
1358         const bool shiftOrControlPressed = QApplication::keyboardModifiers() & Qt::ShiftModifier || QApplication::keyboardModifiers() & Qt::ControlModifier;
1359         if (!shiftOrControlPressed && !m_selectionMode) {
1360             m_oldSelection.clear();
1361         }
1362     }
1363
1364     KItemSet selectedItems;
1365
1366     // Select all visible items that intersect with the rubberband
1367     const auto widgets = m_view->visibleItemListWidgets();
1368     for (const KItemListWidget *widget : widgets) {
1369         const int index = widget->index();
1370
1371         const QRectF widgetRect = m_view->itemRect(index);
1372         if (widgetRect.intersects(rubberBandRect)) {
1373             // Select the full row intersecting with the rubberband rectangle
1374             const QRectF selectionRect = widget->selectionRect().translated(widgetRect.topLeft());
1375             const QRectF iconRect = widget->iconRect().translated(widgetRect.topLeft());
1376             if (selectionRect.intersects(rubberBandRect) || iconRect.intersects(rubberBandRect)) {
1377                 selectedItems.insert(index);
1378             }
1379         }
1380     }
1381
1382     // Select all invisible items that intersect with the rubberband. Instead of
1383     // iterating all items only the area which might be touched by the rubberband
1384     // will be checked.
1385     const bool increaseIndex = scrollVertical ? startPos.y() > endPos.y() : startPos.x() > endPos.x();
1386
1387     int index = increaseIndex ? m_view->lastVisibleIndex() + 1 : m_view->firstVisibleIndex() - 1;
1388     bool selectionFinished = false;
1389     do {
1390         const QRectF widgetRect = m_view->itemRect(index);
1391         if (widgetRect.intersects(rubberBandRect)) {
1392             selectedItems.insert(index);
1393         }
1394
1395         if (increaseIndex) {
1396             ++index;
1397             selectionFinished = (index >= m_model->count()) || (scrollVertical && widgetRect.top() > rubberBandRect.bottom())
1398                 || (!scrollVertical && widgetRect.left() > rubberBandRect.right());
1399         } else {
1400             --index;
1401             selectionFinished = (index < 0) || (scrollVertical && widgetRect.bottom() < rubberBandRect.top())
1402                 || (!scrollVertical && widgetRect.right() < rubberBandRect.left());
1403         }
1404     } while (!selectionFinished);
1405
1406     if ((QApplication::keyboardModifiers() & Qt::ControlModifier) || m_selectionMode) {
1407         // If Control is pressed, the selection state of all items in the rubberband is toggled.
1408         // Therefore, the new selection contains:
1409         // 1. All previously selected items which are not inside the rubberband, and
1410         // 2. all items inside the rubberband which have not been selected previously.
1411         m_selectionManager->setSelectedItems(m_oldSelection ^ selectedItems);
1412     } else {
1413         m_selectionManager->setSelectedItems(selectedItems + m_oldSelection);
1414     }
1415 }
1416
1417 void KItemListController::startDragging()
1418 {
1419     if (!m_view || !m_model) {
1420         return;
1421     }
1422
1423     const KItemSet selectedItems = m_selectionManager->selectedItems();
1424     if (selectedItems.isEmpty()) {
1425         return;
1426     }
1427
1428     QMimeData *data = m_model->createMimeData(selectedItems);
1429     if (!data) {
1430         return;
1431     }
1432     KUrlMimeData::exportUrlsToPortal(data);
1433
1434     // The created drag object will be owned and deleted
1435     // by QApplication::activeWindow().
1436     QDrag *drag = new QDrag(QApplication::activeWindow());
1437     drag->setMimeData(data);
1438
1439     const QPixmap pixmap = m_view->createDragPixmap(selectedItems);
1440     drag->setPixmap(pixmap);
1441
1442     const QPoint hotSpot((pixmap.width() / pixmap.devicePixelRatio()) / 2, 0);
1443     drag->setHotSpot(hotSpot);
1444
1445     drag->exec(Qt::MoveAction | Qt::CopyAction | Qt::LinkAction, Qt::CopyAction);
1446
1447     QAccessibleEvent accessibilityEvent(view(), QAccessible::DragDropStart);
1448     QAccessible::updateAccessibility(&accessibilityEvent);
1449 }
1450
1451 KItemListWidget *KItemListController::hoveredWidget() const
1452 {
1453     Q_ASSERT(m_view);
1454
1455     const auto widgets = m_view->visibleItemListWidgets();
1456     for (KItemListWidget *widget : widgets) {
1457         if (widget->isHovered()) {
1458             return widget;
1459         }
1460     }
1461
1462     return nullptr;
1463 }
1464
1465 KItemListWidget *KItemListController::widgetForPos(const QPointF &pos) const
1466 {
1467     Q_ASSERT(m_view);
1468
1469     if (m_view->headerBoundaries().contains(pos)) {
1470         return nullptr;
1471     }
1472
1473     const auto widgets = m_view->visibleItemListWidgets();
1474     for (KItemListWidget *widget : widgets) {
1475         const QPointF mappedPos = widget->mapFromItem(m_view, pos);
1476         if (widget->contains(mappedPos) || widget->selectionRect().contains(mappedPos)) {
1477             return widget;
1478         }
1479     }
1480
1481     return nullptr;
1482 }
1483
1484 KItemListWidget *KItemListController::widgetForDropPos(const QPointF &pos) const
1485 {
1486     Q_ASSERT(m_view);
1487
1488     if (m_view->headerBoundaries().contains(pos)) {
1489         return nullptr;
1490     }
1491
1492     const auto widgets = m_view->visibleItemListWidgets();
1493     for (KItemListWidget *widget : widgets) {
1494         const QPointF mappedPos = widget->mapFromItem(m_view, pos);
1495         if (widget->contains(mappedPos)) {
1496             return widget;
1497         }
1498     }
1499
1500     return nullptr;
1501 }
1502
1503 void KItemListController::updateKeyboardAnchor()
1504 {
1505     const bool validAnchor =
1506         m_keyboardAnchorIndex >= 0 && m_keyboardAnchorIndex < m_model->count() && keyboardAnchorPos(m_keyboardAnchorIndex) == m_keyboardAnchorPos;
1507     if (!validAnchor) {
1508         const int index = m_selectionManager->currentItem();
1509         m_keyboardAnchorIndex = index;
1510         m_keyboardAnchorPos = keyboardAnchorPos(index);
1511     }
1512 }
1513
1514 int KItemListController::nextRowIndex(int index) const
1515 {
1516     if (m_keyboardAnchorIndex < 0) {
1517         return index;
1518     }
1519
1520     const int maxIndex = m_model->count() - 1;
1521     if (index == maxIndex) {
1522         return index;
1523     }
1524
1525     const bool reversed = m_view->layoutDirection() == Qt::RightToLeft && m_view->scrollOrientation() == Qt::Vertical;
1526
1527     // Calculate the index of the last column inside the row of the current index
1528     int lastColumnIndex = index;
1529     while ((!reversed && keyboardAnchorPos(lastColumnIndex + 1) > keyboardAnchorPos(lastColumnIndex))
1530            || (reversed && keyboardAnchorPos(lastColumnIndex + 1) < keyboardAnchorPos(lastColumnIndex))) {
1531         ++lastColumnIndex;
1532         if (lastColumnIndex >= maxIndex) {
1533             return index;
1534         }
1535     }
1536
1537     // Based on the last column index go to the next row and calculate the nearest index
1538     // that is below the current index
1539     int nextRowIndex = lastColumnIndex + 1;
1540     int searchIndex = nextRowIndex;
1541     qreal minDiff = qAbs(m_keyboardAnchorPos - keyboardAnchorPos(nextRowIndex));
1542     while (searchIndex < maxIndex
1543            && ((!reversed && keyboardAnchorPos(searchIndex + 1) > keyboardAnchorPos(searchIndex))
1544                || (reversed && keyboardAnchorPos(searchIndex + 1) < keyboardAnchorPos(searchIndex)))) {
1545         ++searchIndex;
1546         const qreal searchDiff = qAbs(m_keyboardAnchorPos - keyboardAnchorPos(searchIndex));
1547         if (searchDiff < minDiff) {
1548             minDiff = searchDiff;
1549             nextRowIndex = searchIndex;
1550         }
1551     }
1552
1553     return nextRowIndex;
1554 }
1555
1556 int KItemListController::previousRowIndex(int index) const
1557 {
1558     if (m_keyboardAnchorIndex < 0 || index == 0) {
1559         return index;
1560     }
1561
1562     const bool reversed = m_view->layoutDirection() == Qt::RightToLeft && m_view->scrollOrientation() == Qt::Vertical;
1563
1564     // Calculate the index of the first column inside the row of the current index
1565     int firstColumnIndex = index;
1566     while ((!reversed && keyboardAnchorPos(firstColumnIndex - 1) < keyboardAnchorPos(firstColumnIndex))
1567            || (reversed && keyboardAnchorPos(firstColumnIndex - 1) > keyboardAnchorPos(firstColumnIndex))) {
1568         --firstColumnIndex;
1569         if (firstColumnIndex <= 0) {
1570             return index;
1571         }
1572     }
1573
1574     // Based on the first column index go to the previous row and calculate the nearest index
1575     // that is above the current index
1576     int previousRowIndex = firstColumnIndex - 1;
1577     int searchIndex = previousRowIndex;
1578     qreal minDiff = qAbs(m_keyboardAnchorPos - keyboardAnchorPos(previousRowIndex));
1579     while (searchIndex > 0
1580            && ((!reversed && keyboardAnchorPos(searchIndex - 1) < keyboardAnchorPos(searchIndex))
1581                || (reversed && keyboardAnchorPos(searchIndex - 1) > keyboardAnchorPos(searchIndex)))) {
1582         --searchIndex;
1583         const qreal searchDiff = qAbs(m_keyboardAnchorPos - keyboardAnchorPos(searchIndex));
1584         if (searchDiff < minDiff) {
1585             minDiff = searchDiff;
1586             previousRowIndex = searchIndex;
1587         }
1588     }
1589
1590     return previousRowIndex;
1591 }
1592
1593 qreal KItemListController::keyboardAnchorPos(int index) const
1594 {
1595     const QRectF itemRect = m_view->itemRect(index);
1596     if (!itemRect.isEmpty()) {
1597         return (m_view->scrollOrientation() == Qt::Vertical) ? itemRect.x() : itemRect.y();
1598     }
1599
1600     return 0;
1601 }
1602
1603 void KItemListController::updateExtendedSelectionRegion()
1604 {
1605     if (m_view) {
1606         const bool extend = (m_selectionBehavior != MultiSelection);
1607         KItemListStyleOption option = m_view->styleOption();
1608         if (option.extendedSelectionRegion != extend) {
1609             option.extendedSelectionRegion = extend;
1610             m_view->setStyleOption(option);
1611         }
1612     }
1613 }
1614
1615 bool KItemListController::onPress(const QPointF &pos, const Qt::KeyboardModifiers modifiers, const Qt::MouseButtons buttons)
1616 {
1617     Q_EMIT mouseButtonPressed(m_pressedIndex.value_or(-1), buttons);
1618
1619     if (buttons & (Qt::BackButton | Qt::ForwardButton)) {
1620         // Do not select items when clicking the back/forward buttons, see
1621         // https://bugs.kde.org/show_bug.cgi?id=327412.
1622         return true;
1623     }
1624
1625     const QPointF pressedMousePos = m_view->transform().map(pos);
1626
1627     if (m_view->isAboveExpansionToggle(m_pressedIndex.value_or(-1), pressedMousePos)) {
1628         m_selectionManager->endAnchoredSelection();
1629         m_selectionManager->setCurrentItem(m_pressedIndex.value());
1630         m_selectionManager->beginAnchoredSelection(m_pressedIndex.value());
1631         return true;
1632     }
1633
1634     m_selectionTogglePressed = m_view->isAboveSelectionToggle(m_pressedIndex.value_or(-1), pressedMousePos);
1635     if (m_selectionTogglePressed) {
1636         m_selectionManager->setSelected(m_pressedIndex.value(), 1, KItemListSelectionManager::Toggle);
1637         // The previous anchored selection has been finished already in
1638         // KItemListSelectionManager::setSelected(). We can safely change
1639         // the current item and start a new anchored selection now.
1640         m_selectionManager->setCurrentItem(m_pressedIndex.value());
1641         m_selectionManager->beginAnchoredSelection(m_pressedIndex.value());
1642         return true;
1643     }
1644
1645     const bool shiftPressed = modifiers & Qt::ShiftModifier;
1646     const bool controlPressed = (modifiers & Qt::ControlModifier) || m_selectionMode; // Keeping selectionMode similar to pressing control will hopefully
1647                                                                                       // simplify the overall logic and possibilities both for users and devs.
1648     const bool leftClick = buttons & Qt::LeftButton;
1649     const bool rightClick = buttons & Qt::RightButton;
1650
1651     // The previous selection is cleared if either
1652     // 1. The selection mode is SingleSelection, or
1653     // 2. the selection mode is MultiSelection, and *none* of the following conditions are met:
1654     //    a) Shift or Control are pressed.
1655     //    b) The clicked item is selected already. In that case, the user might want to:
1656     //       - start dragging multiple items, or
1657     //       - open the context menu and perform an action for all selected items.
1658     const bool shiftOrControlPressed = shiftPressed || controlPressed;
1659     const bool pressedItemAlreadySelected = m_pressedIndex.has_value() && m_selectionManager->isSelected(m_pressedIndex.value());
1660     const bool clearSelection = m_selectionBehavior == SingleSelection || (!shiftOrControlPressed && !pressedItemAlreadySelected);
1661
1662     // When this method returns false, a rubberBand selection is created using KItemListController::startRubberBand via the caller.
1663     if (clearSelection) {
1664         const int selectedItemsCount = m_selectionManager->selectedItems().count();
1665         m_selectionManager->clearSelection();
1666         // clear and bail when we got an existing multi-selection
1667         if (selectedItemsCount > 1 && m_pressedIndex.has_value()) {
1668             const auto row = m_view->m_visibleItems.value(m_pressedIndex.value());
1669             const auto mappedPos = row->mapFromItem(m_view, pos);
1670             if (pressedItemAlreadySelected || row->iconRect().contains(mappedPos) || row->textRect().contains(mappedPos)) {
1671                 // we are indeed inside the text/icon rect, keep m_pressedIndex what it is
1672                 // and short-circuit for single-click activation (it will then propagate to onRelease and activate the item)
1673                 // or we just keep going for double-click activation
1674                 if (m_view->style()->styleHint(QStyle::SH_ItemView_ActivateItemOnSingleClick) || m_singleClickActivationEnforced) {
1675                     if (!pressedItemAlreadySelected) {
1676                         // An unselected item was clicked directly while deselecting multiple other items so we mark it "current".
1677                         m_selectionManager->setCurrentItem(m_pressedIndex.value());
1678                         m_selectionManager->beginAnchoredSelection(m_pressedIndex.value());
1679                         if (!leftClick) {
1680                             // We select the item here because this press is not meant to directly activate the item.
1681                             // We do not want to select items unless the user wants to edit them.
1682                             m_selectionManager->setSelected(m_pressedIndex.value(), 1, KItemListSelectionManager::Toggle);
1683                         }
1684                     }
1685                     return true; // event handled, don't create rubber band
1686                 }
1687             } else {
1688                 // we're not inside the text/icon rect, as we've already cleared the selection
1689                 // we can just stop here and make sure handlers down the line (i.e. onRelease) don't activate
1690                 m_pressedIndex.reset();
1691                 // we don't stop event propagation and proceed to create a rubber band and let onRelease
1692                 // decide (based on m_pressedIndex) whether we're in a drag (drag => new rubber band, click => don't select the item)
1693                 return false;
1694             }
1695         }
1696     } else if (pressedItemAlreadySelected && !shiftOrControlPressed && leftClick) {
1697         // The user might want to start dragging multiple items, but if he clicks the item
1698         // in order to trigger it instead, the other selected items must be deselected.
1699         // However, we do not know yet what the user is going to do.
1700         // -> remember that the user pressed an item which had been selected already and
1701         //    clear the selection in mouseReleaseEvent(), unless the items are dragged.
1702         m_clearSelectionIfItemsAreNotDragged = true;
1703
1704         if (m_selectionManager->selectedItems().count() == 1 && m_view->isAboveText(m_pressedIndex.value_or(-1), pressedMousePos)) {
1705             Q_EMIT selectedItemTextPressed(m_pressedIndex.value_or(-1));
1706         }
1707     }
1708
1709     if (!shiftPressed) {
1710         // Finish the anchored selection before the current index is changed
1711         m_selectionManager->endAnchoredSelection();
1712     }
1713
1714     if (rightClick) {
1715         // Stop rubber band from persisting after right-clicks
1716         KItemListRubberBand *rubberBand = m_view->rubberBand();
1717         if (rubberBand->isActive()) {
1718             disconnect(rubberBand, &KItemListRubberBand::endPositionChanged, this, &KItemListController::slotRubberBandChanged);
1719             rubberBand->setActive(false);
1720             m_view->setAutoScroll(false);
1721         }
1722
1723         if (!m_pressedIndex.has_value()) {
1724             // We have a right-click in an empty region, don't create rubber band.
1725             return true;
1726         }
1727     }
1728
1729     if (m_pressedIndex.has_value()) {
1730         // The hover highlight area of an item is being pressed.
1731         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
1732         const bool hitTargetIsRowEmptyRegion = !row->contains(row->mapFromItem(m_view, pos));
1733         // again, when this method returns false, a rubberBand selection is created as the event is not consumed;
1734         // createRubberBand here tells us whether to return true or false.
1735         bool createRubberBand = (hitTargetIsRowEmptyRegion && m_selectionManager->selectedItems().isEmpty());
1736
1737         if (rightClick && hitTargetIsRowEmptyRegion) {
1738             // We have a right click outside the icon and text rect but within the hover highlight area.
1739             // We don't want items to get selected through this, so we return now.
1740             return true;
1741         }
1742
1743         m_selectionManager->setCurrentItem(m_pressedIndex.value());
1744
1745         switch (m_selectionBehavior) {
1746         case NoSelection:
1747             break;
1748
1749         case SingleSelection:
1750             if (!leftClick || shiftOrControlPressed
1751                 || (!m_view->style()->styleHint(QStyle::SH_ItemView_ActivateItemOnSingleClick) && !m_singleClickActivationEnforced)) {
1752                 m_selectionManager->setSelected(m_pressedIndex.value());
1753             }
1754             break;
1755
1756         case MultiSelection:
1757             if (controlPressed && !shiftPressed && leftClick) {
1758                 // A left mouse button press is happening on an item while control is pressed. This either means a user wants to:
1759                 // - toggle the selection of item(s) or
1760                 // - they want to begin a drag on the item(s) to copy them.
1761                 // We rule out the latter, if the item is not clicked directly and was unselected previously.
1762                 const auto row = m_view->m_visibleItems.value(m_pressedIndex.value());
1763                 const auto mappedPos = row->mapFromItem(m_view, pos);
1764                 if (!row->iconRect().contains(mappedPos) && !row->textRect().contains(mappedPos) && !pressedItemAlreadySelected) {
1765                     createRubberBand = true;
1766                 } else {
1767                     m_selectionManager->setSelected(m_pressedIndex.value(), 1, KItemListSelectionManager::Toggle);
1768                     m_selectionManager->beginAnchoredSelection(m_pressedIndex.value());
1769                     createRubberBand = false; // multi selection, don't propagate any further
1770                     // This will be the start of an item drag-to-copy operation if the user now moves the mouse before releasing the mouse button.
1771                 }
1772             } else if (!shiftPressed || !m_selectionManager->isAnchoredSelectionActive()) {
1773                 // Select the pressed item and start a new anchored selection
1774                 if (!leftClick || shiftOrControlPressed
1775                     || (!m_view->style()->styleHint(QStyle::SH_ItemView_ActivateItemOnSingleClick) && !m_singleClickActivationEnforced)) {
1776                     m_selectionManager->setSelected(m_pressedIndex.value(), 1, KItemListSelectionManager::Select);
1777                 }
1778                 m_selectionManager->beginAnchoredSelection(m_pressedIndex.value());
1779             }
1780             break;
1781
1782         default:
1783             Q_ASSERT(false);
1784             break;
1785         }
1786
1787         return !createRubberBand;
1788     }
1789
1790     return false;
1791 }
1792
1793 bool KItemListController::onRelease(const QPointF &pos, const Qt::KeyboardModifiers modifiers, const Qt::MouseButtons buttons, bool touch)
1794 {
1795     const QPointF pressedMousePos = pos;
1796     const bool isAboveSelectionToggle = m_view->isAboveSelectionToggle(m_pressedIndex.value_or(-1), pressedMousePos);
1797     if (isAboveSelectionToggle) {
1798         m_selectionTogglePressed = false;
1799         return true;
1800     }
1801
1802     if (!isAboveSelectionToggle && m_selectionTogglePressed) {
1803         m_selectionManager->setSelected(m_pressedIndex.value_or(-1), 1, KItemListSelectionManager::Toggle);
1804         m_selectionTogglePressed = false;
1805         return true;
1806     }
1807
1808     const bool controlPressed = modifiers & Qt::ControlModifier;
1809     const bool shiftOrControlPressed = modifiers & Qt::ShiftModifier || controlPressed;
1810
1811     const std::optional<int> index = m_view->itemAt(pos);
1812
1813     KItemListRubberBand *rubberBand = m_view->rubberBand();
1814     bool rubberBandRelease = false;
1815     if (rubberBand->isActive()) {
1816         disconnect(rubberBand, &KItemListRubberBand::endPositionChanged, this, &KItemListController::slotRubberBandChanged);
1817         rubberBand->setActive(false);
1818         m_oldSelection.clear();
1819         m_view->setAutoScroll(false);
1820         rubberBandRelease = true;
1821         // We check for actual rubber band drag here: if delta between start and end is less than drag threshold,
1822         // then we have a single click on one of the rows
1823         if ((rubberBand->endPosition() - rubberBand->startPosition()).manhattanLength() < QApplication::startDragDistance()) {
1824             rubberBandRelease = false; // since we're only selecting, unmark rubber band release flag
1825             // m_pressedIndex will have no value if we came from a multi-selection clearing onPress
1826             // in that case, we don't select anything
1827             if (index.has_value() && m_pressedIndex.has_value()) {
1828                 if (controlPressed && m_selectionBehavior == MultiSelection) {
1829                     m_selectionManager->setSelected(m_pressedIndex.value(), 1, KItemListSelectionManager::Toggle);
1830                 } else {
1831                     m_selectionManager->setSelected(index.value());
1832                 }
1833                 if (!m_selectionManager->isAnchoredSelectionActive()) {
1834                     m_selectionManager->beginAnchoredSelection(index.value());
1835                 }
1836             }
1837         }
1838     }
1839
1840     if (index.has_value() && index == m_pressedIndex) {
1841         // The release event is done above the same item as the press event
1842
1843         if (m_clearSelectionIfItemsAreNotDragged) {
1844             // A selected item has been clicked, but no drag operation has been started
1845             // -> clear the rest of the selection.
1846             m_selectionManager->clearSelection();
1847             m_selectionManager->setSelected(m_pressedIndex.value(), 1, KItemListSelectionManager::Select);
1848             m_selectionManager->beginAnchoredSelection(m_pressedIndex.value());
1849         }
1850
1851         if (buttons & Qt::LeftButton) {
1852             bool emitItemActivated = true;
1853             if (m_view->isAboveExpansionToggle(index.value(), pos)) {
1854                 const bool expanded = m_model->isExpanded(index.value());
1855                 m_model->setExpanded(index.value(), !expanded);
1856
1857                 Q_EMIT itemExpansionToggleClicked(index.value());
1858                 emitItemActivated = false;
1859             } else if (shiftOrControlPressed && m_selectionBehavior != SingleSelection) {
1860                 // The mouse click should only update the selection, not trigger the item, except when
1861                 // we are in single selection mode
1862                 emitItemActivated = false;
1863             } else {
1864                 const bool singleClickActivation = m_view->style()->styleHint(QStyle::SH_ItemView_ActivateItemOnSingleClick) || m_singleClickActivationEnforced;
1865                 if (!singleClickActivation) {
1866                     emitItemActivated = touch && !m_selectionMode;
1867                 } else {
1868                     // activate on single click only if we didn't come from a rubber band release
1869                     emitItemActivated = !rubberBandRelease;
1870                 }
1871             }
1872             if (emitItemActivated) {
1873                 Q_EMIT itemActivated(index.value());
1874             }
1875         } else if (buttons & Qt::MiddleButton) {
1876             Q_EMIT itemMiddleClicked(index.value());
1877         }
1878     }
1879
1880     m_pressedMouseGlobalPos = QPointF();
1881     m_pressedIndex = std::nullopt;
1882     m_clearSelectionIfItemsAreNotDragged = false;
1883     return false;
1884 }
1885
1886 void KItemListController::startRubberBand()
1887 {
1888     if (m_selectionBehavior == MultiSelection) {
1889         QPoint startPos = m_view->transform().map(m_view->scene()->views().first()->mapFromGlobal(m_pressedMouseGlobalPos.toPoint()));
1890         if (m_view->scrollOrientation() == Qt::Vertical) {
1891             startPos.ry() += m_view->scrollOffset();
1892         } else {
1893             startPos.rx() += m_view->scrollOffset();
1894         }
1895
1896         m_oldSelection = m_selectionManager->selectedItems();
1897         KItemListRubberBand *rubberBand = m_view->rubberBand();
1898         rubberBand->setStartPosition(startPos);
1899         rubberBand->setEndPosition(startPos);
1900         rubberBand->setActive(true);
1901         connect(rubberBand, &KItemListRubberBand::endPositionChanged, this, &KItemListController::slotRubberBandChanged);
1902         m_view->setAutoScroll(true);
1903     }
1904 }
1905
1906 void KItemListController::slotStateChanged(QScroller::State newState)
1907 {
1908     if (newState == QScroller::Scrolling) {
1909         m_scrollerIsScrolling = true;
1910     } else if (newState == QScroller::Inactive) {
1911         m_scrollerIsScrolling = false;
1912     }
1913 }
1914
1915 #include "moc_kitemlistcontroller.cpp"