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     if (m_view->layoutDirection() == Qt::RightToLeft) {
 247         // swap left and right arrow keys
 248         switch (key) {
 249         case Qt::Key_Left:
 250             key = Qt::Key_Right;
 251             break;
 252         case Qt::Key_Right:
 253             key = Qt::Key_Left;
 254             break;
 255         default:
 256             break;
 257         }
 258     }
 259
 260     // Handle the expanding/collapsing of items
 261     // expand / collapse all selected directories
 262     if (m_view->supportsItemExpanding() && m_model->isExpandable(index) && (key == Qt::Key_Right || key == Qt::Key_Left)) {
 263         const bool expandOrCollapse = key == Qt::Key_Right ? true : false;
 264         bool shouldReturn = m_model->setExpanded(index, expandOrCollapse);
 265
 266         // edit in reverse to preserve index of the first handled items
 267         const auto selectedItems = m_selectionManager->selectedItems();
 268         for (auto it = selectedItems.rbegin(); it != selectedItems.rend(); ++it) {
 269             shouldReturn |= m_model->setExpanded(*it, expandOrCollapse);
 270             if (!shiftPressed) {
 271                 m_selectionManager->setSelected(*it);
 272             }
 273         }
 274         if (shouldReturn) {
 275             // update keyboard anchors
 276             if (shiftPressed) {
 277                 m_keyboardAnchorIndex = selectedItems.count() > 0 ? qMin(index, selectedItems.last()) : index;
 278                 m_keyboardAnchorPos = keyboardAnchorPos(m_keyboardAnchorIndex);
 279             }
 280
 281             event->ignore();
 282             return true;
 283         }
 284     }
 285
 286     const bool controlPressed = event->modifiers() & Qt::ControlModifier;
 287     if (m_selectionMode && !controlPressed && !shiftPressed && (key == Qt::Key_Enter || key == Qt::Key_Return)) {
 288         key = Qt::Key_Space; // In selection mode one moves around with arrow keys and toggles selection with Enter.
 289     }
 290     const bool navigationPressed = key == Qt::Key_Home || key == Qt::Key_End || key == Qt::Key_PageUp || key == Qt::Key_PageDown || key == Qt::Key_Up
 291         || key == Qt::Key_Down || key == Qt::Key_Left || key == Qt::Key_Right;
 292
 293     const int itemCount = m_model->count();
 294
 295     // For horizontal scroll orientation, transform
 296     // the arrow keys to simplify the event handling.
 297     if (horizontalScrolling) {
 298         switch (key) {
 299         case Qt::Key_Up:
 300             key = Qt::Key_Left;
 301             break;
 302         case Qt::Key_Down:
 303             key = Qt::Key_Right;
 304             break;
 305         case Qt::Key_Left:
 306             key = Qt::Key_Up;
 307             break;
 308         case Qt::Key_Right:
 309             key = Qt::Key_Down;
 310             break;
 311         default:
 312             break;
 313         }
 314     }
 315
 316     const bool selectSingleItem = m_selectionBehavior != NoSelection && itemCount == 1 && navigationPressed;
 317
 318     if (selectSingleItem) {
 319         const int current = m_selectionManager->currentItem();
 320         m_selectionManager->setSelected(current);
 321         return true;
 322     }
 323
 324     switch (key) {
 325     case Qt::Key_Home:
 326         index = 0;
 327         m_keyboardAnchorIndex = index;
 328         m_keyboardAnchorPos = keyboardAnchorPos(index);
 329         break;
 330
 331     case Qt::Key_End:
 332         index = itemCount - 1;
 333         m_keyboardAnchorIndex = index;
 334         m_keyboardAnchorPos = keyboardAnchorPos(index);
 335         break;
 336
 337     case Qt::Key_Left:
 338         if (index > 0) {
 339             const int expandedParentsCount = m_model->expandedParentsCount(index);
 340             if (expandedParentsCount == 0) {
 341                 --index;
 342             } else {
 343                 // Go to the parent of the current item.
 344                 do {
 345                     --index;
 346                 } while (index > 0 && m_model->expandedParentsCount(index) == expandedParentsCount);
 347             }
 348             m_keyboardAnchorIndex = index;
 349             m_keyboardAnchorPos = keyboardAnchorPos(index);
 350         }
 351         break;
 352
 353     case Qt::Key_Right:
 354         if (index < itemCount - 1) {
 355             ++index;
 356             m_keyboardAnchorIndex = index;
 357             m_keyboardAnchorPos = keyboardAnchorPos(index);
 358         }
 359         break;
 360
 361     case Qt::Key_Up:
 362         updateKeyboardAnchor();
 363         if (shiftPressed && !m_selectionManager->isAnchoredSelectionActive() && m_selectionManager->isSelected(index)) {
 364             m_selectionManager->beginAnchoredSelection(index);
 365         }
 366         index = previousRowIndex(index);
 367         break;
 368
 369     case Qt::Key_Down:
 370         updateKeyboardAnchor();
 371         if (shiftPressed && !m_selectionManager->isAnchoredSelectionActive() && m_selectionManager->isSelected(index)) {
 372             m_selectionManager->beginAnchoredSelection(index);
 373         }
 374         index = nextRowIndex(index);
 375         break;
 376
 377     case Qt::Key_PageUp:
 378         if (horizontalScrolling) {
 379             // The new current index should correspond to the first item in the current column.
 380             int newIndex = qMax(index - 1, 0);
 381             while (newIndex != index && m_view->itemRect(newIndex).topLeft().y() < m_view->itemRect(index).topLeft().y()) {
 382                 index = newIndex;
 383                 newIndex = qMax(index - 1, 0);
 384             }
 385             m_keyboardAnchorIndex = index;
 386             m_keyboardAnchorPos = keyboardAnchorPos(index);
 387         } else {
 388             const qreal currentItemBottom = m_view->itemRect(index).bottomLeft().y();
 389             const qreal height = m_view->geometry().height();
 390
 391             // The new current item should be the first item in the current
 392             // column whose itemRect's top coordinate is larger than targetY.
 393             const qreal targetY = currentItemBottom - height;
 394
 395             updateKeyboardAnchor();
 396             int newIndex = previousRowIndex(index);
 397             do {
 398                 index = newIndex;
 399                 updateKeyboardAnchor();
 400                 newIndex = previousRowIndex(index);
 401             } while (m_view->itemRect(newIndex).topLeft().y() > targetY && newIndex != index);
 402         }
 403         break;
 404
 405     case Qt::Key_PageDown:
 406         if (horizontalScrolling) {
 407             // The new current index should correspond to the last item in the current column.
 408             int newIndex = qMin(index + 1, m_model->count() - 1);
 409             while (newIndex != index && m_view->itemRect(newIndex).topLeft().y() > m_view->itemRect(index).topLeft().y()) {
 410                 index = newIndex;
 411                 newIndex = qMin(index + 1, m_model->count() - 1);
 412             }
 413             m_keyboardAnchorIndex = index;
 414             m_keyboardAnchorPos = keyboardAnchorPos(index);
 415         } else {
 416             const qreal currentItemTop = m_view->itemRect(index).topLeft().y();
 417             const qreal height = m_view->geometry().height();
 418
 419             // The new current item should be the last item in the current
 420             // column whose itemRect's bottom coordinate is smaller than targetY.
 421             const qreal targetY = currentItemTop + height;
 422
 423             updateKeyboardAnchor();
 424             int newIndex = nextRowIndex(index);
 425             do {
 426                 index = newIndex;
 427                 updateKeyboardAnchor();
 428                 newIndex = nextRowIndex(index);
 429             } while (m_view->itemRect(newIndex).bottomLeft().y() < targetY && newIndex != index);
 430         }
 431         break;
 432
 433     case Qt::Key_Enter:
 434     case Qt::Key_Return: {
 435         const KItemSet selectedItems = m_selectionManager->selectedItems();
 436         if (selectedItems.count() >= 2) {
 437             Q_EMIT itemsActivated(selectedItems);
 438         } else if (selectedItems.count() == 1) {
 439             Q_EMIT itemActivated(selectedItems.first());
 440         } else {
 441             Q_EMIT itemActivated(index);
 442         }
 443         break;
 444     }
 445
 446     case Qt::Key_Escape:
 447         if (m_selectionMode) {
 448             Q_EMIT selectionModeChangeRequested(false);
 449         } else if (m_selectionBehavior != SingleSelection) {
 450             m_selectionManager->clearSelection();
 451         }
 452         m_keyboardManager->cancelSearch();
 453         Q_EMIT escapePressed();
 454         break;
 455
 456     case Qt::Key_Space:
 457         if (m_selectionBehavior == MultiSelection) {
 458             if (controlPressed || m_selectionMode) {
 459                 // Toggle the selection state of the current item.
 460                 m_selectionManager->endAnchoredSelection();
 461                 m_selectionManager->setSelected(index, 1, KItemListSelectionManager::Toggle);
 462                 m_selectionManager->beginAnchoredSelection(index);
 463                 break;
 464             } else {
 465                 // Select the current item if it is not selected yet.
 466                 const int current = m_selectionManager->currentItem();
 467                 if (!m_selectionManager->isSelected(current)) {
 468                     m_selectionManager->setSelected(current);
 469                     break;
 470                 }
 471             }
 472         }
 473         Q_FALLTHROUGH(); // fall through to the default case and add the Space to the current search string.
 474     default:
 475         m_keyboardManager->addKeys(event->text());
 476         // Make sure unconsumed events get propagated up the chain. #302329
 477         event->ignore();
 478         return false;
 479     }
 480
 481     if (m_selectionManager->currentItem() != index) {
 482         switch (m_selectionBehavior) {
 483         case NoSelection:
 484             m_selectionManager->setCurrentItem(index);
 485             break;
 486
 487         case SingleSelection:
 488             m_selectionManager->setCurrentItem(index);
 489             m_selectionManager->clearSelection();
 490             m_selectionManager->setSelected(index, 1);
 491             break;
 492
 493         case MultiSelection:
 494             if (controlPressed || (m_selectionMode && !shiftPressed)) {
 495                 m_selectionManager->endAnchoredSelection();
 496             }
 497
 498             m_selectionManager->setCurrentItem(index);
 499
 500             if (!shiftPressed && !controlPressed && !m_selectionMode) {
 501                 m_selectionManager->clearSelection();
 502                 m_selectionManager->setSelected(index, 1);
 503             }
 504
 505             if (!shiftPressed) {
 506                 m_selectionManager->beginAnchoredSelection(index);
 507             }
 508             break;
 509         }
 510     }
 511
 512     if (navigationPressed) {
 513         m_view->scrollToItem(index);
 514     }
 515     return true;
 516 }
 517
 518 void KItemListController::slotChangeCurrentItem(const QString &text, bool searchFromNextItem)
 519 {
 520     if (!m_model || m_model->count() == 0) {
 521         return;
 522     }
 523     int index;
 524     if (searchFromNextItem) {
 525         const int currentIndex = m_selectionManager->currentItem();
 526         index = m_model->indexForKeyboardSearch(text, (currentIndex + 1) % m_model->count());
 527     } else {
 528         index = m_model->indexForKeyboardSearch(text, 0);
 529     }
 530     if (index >= 0) {
 531         if (m_selectionMode) {
 532             m_selectionManager->endAnchoredSelection();
 533         }
 534
 535         m_selectionManager->setCurrentItem(index);
 536
 537         if (m_selectionBehavior != NoSelection) {
 538             if (!m_selectionMode) { // Don't clear the selection in selection mode.
 539                 m_selectionManager->replaceSelection(index);
 540             }
 541             m_selectionManager->beginAnchoredSelection(index);
 542         }
 543
 544         m_view->scrollToItem(index, KItemListView::ViewItemPosition::Beginning);
 545     }
 546 }
 547
 548 void KItemListController::slotAutoActivationTimeout()
 549 {
 550     if (!m_model || !m_view) {
 551         return;
 552     }
 553
 554     const int index = m_autoActivationTimer->property("index").toInt();
 555     if (index < 0 || index >= m_model->count()) {
 556         return;
 557     }
 558
 559     /* m_view->isUnderMouse() fixes a bug in the Folder-View-Panel and in the
 560      * Places-Panel.
 561      *
 562      * Bug: When you drag a file onto a Folder-View-Item or a Places-Item and
 563      * then move away before the auto-activation timeout triggers, than the
 564      * item still becomes activated/expanded.
 565      *
 566      * See Bug 293200 and 305783
 567      */
 568     if (m_view->isUnderMouse()) {
 569         if (m_view->supportsItemExpanding() && m_model->isExpandable(index)) {
 570             const bool expanded = m_model->isExpanded(index);
 571             m_model->setExpanded(index, !expanded);
 572         } else if (m_autoActivationBehavior != ExpansionOnly) {
 573             Q_EMIT itemActivated(index);
 574         }
 575     }
 576 }
 577
 578 bool KItemListController::inputMethodEvent(QInputMethodEvent *event)
 579 {
 580     Q_UNUSED(event)
 581     return false;
 582 }
 583
 584 bool KItemListController::mousePressEvent(QGraphicsSceneMouseEvent *event, const QTransform &transform)
 585 {
 586     m_mousePress = true;
 587     m_pressedMouseGlobalPos = event->screenPos();
 588
 589     if (event->source() == Qt::MouseEventSynthesizedByQt && m_isTouchEvent) {
 590         return false;
 591     }
 592
 593     if (!m_view) {
 594         return false;
 595     }
 596
 597     const QPointF pressedMousePos = transform.map(event->pos());
 598     m_pressedIndex = m_view->itemAt(pressedMousePos);
 599
 600     const Qt::MouseButtons buttons = event->buttons();
 601
 602     if (!onPress(event->pos(), event->modifiers(), buttons)) {
 603         startRubberBand();
 604         return false;
 605     }
 606
 607     return true;
 608 }
 609
 610 bool KItemListController::mouseMoveEvent(QGraphicsSceneMouseEvent *event, const QTransform &transform)
 611 {
 612     if (!m_view) {
 613         return false;
 614     }
 615
 616     if (m_view->m_tapAndHoldIndicator->isActive()) {
 617         m_view->m_tapAndHoldIndicator->setActive(false);
 618     }
 619
 620     if (event->source() == Qt::MouseEventSynthesizedByQt && !m_dragActionOrRightClick && m_isTouchEvent) {
 621         return false;
 622     }
 623
 624     if (m_pressedIndex.has_value() && !m_view->rubberBand()->isActive()) {
 625         // Check whether a dragging should be started
 626         if (event->buttons() & Qt::LeftButton) {
 627             const auto distance = (event->screenPos() - m_pressedMouseGlobalPos).manhattanLength();
 628             if (distance >= QApplication::startDragDistance()) {
 629                 if (!m_selectionManager->isSelected(m_pressedIndex.value())) {
 630                     // Always assure that the dragged item gets selected. Usually this is already
 631                     // done on the mouse-press event, but when using the selection-toggle on a
 632                     // selected item the dragged item is not selected yet.
 633                     m_selectionManager->setSelected(m_pressedIndex.value(), 1, KItemListSelectionManager::Toggle);
 634                 } else {
 635                     // A selected item has been clicked to drag all selected items
 636                     // -> the selection should not be cleared when the mouse button is released.
 637                     m_clearSelectionIfItemsAreNotDragged = false;
 638                 }
 639                 startDragging();
 640                 m_mousePress = false;
 641             }
 642         }
 643     } else {
 644         KItemListRubberBand *rubberBand = m_view->rubberBand();
 645         if (rubberBand->isActive()) {
 646             QPointF endPos = transform.map(event->pos());
 647
 648             // Update the current item.
 649             const std::optional<int> newCurrent = m_view->itemAt(endPos);
 650             if (newCurrent.has_value()) {
 651                 // It's expected that the new current index is also the new anchor (bug 163451).
 652                 m_selectionManager->endAnchoredSelection();
 653                 m_selectionManager->setCurrentItem(newCurrent.value());
 654                 m_selectionManager->beginAnchoredSelection(newCurrent.value());
 655             }
 656
 657             if (m_view->scrollOrientation() == Qt::Vertical) {
 658                 endPos.ry() += m_view->scrollOffset();
 659             } else {
 660                 endPos.rx() += m_view->scrollOffset();
 661             }
 662             rubberBand->setEndPosition(endPos);
 663         }
 664     }
 665
 666     return false;
 667 }
 668
 669 bool KItemListController::mouseReleaseEvent(QGraphicsSceneMouseEvent *event, const QTransform &transform)
 670 {
 671     m_mousePress = false;
 672     m_isTouchEvent = false;
 673
 674     if (!m_view) {
 675         return false;
 676     }
 677
 678     if (m_view->m_tapAndHoldIndicator->isActive()) {
 679         m_view->m_tapAndHoldIndicator->setActive(false);
 680     }
 681
 682     KItemListRubberBand *rubberBand = m_view->rubberBand();
 683     if (event->source() == Qt::MouseEventSynthesizedByQt && !rubberBand->isActive() && m_isTouchEvent) {
 684         return false;
 685     }
 686
 687     Q_EMIT mouseButtonReleased(m_pressedIndex.value_or(-1), event->buttons());
 688
 689     return onRelease(transform.map(event->pos()), event->modifiers(), event->button(), false);
 690 }
 691
 692 bool KItemListController::mouseDoubleClickEvent(QGraphicsSceneMouseEvent *event, const QTransform &transform)
 693 {
 694     const QPointF pos = transform.map(event->pos());
 695     const std::optional<int> index = m_view->itemAt(pos);
 696
 697     if (event->button() & (Qt::ForwardButton | Qt::BackButton)) {
 698         // "Forward" and "Back" are reserved for quickly navigating through the
 699         // history. Double-clicking those buttons should be interpreted as two
 700         // separate button presses. We arrive here for the second click, which
 701         // we now react to just as we would for a singular click
 702         Q_EMIT mouseButtonPressed(index.value_or(-1), event->button());
 703         return false;
 704     }
 705
 706     if (!index.has_value()) {
 707         Q_EMIT doubleClickViewBackground(event->button());
 708         return false;
 709     }
 710
 711     // Expand item if desired - See Bug 295573
 712     if (m_mouseDoubleClickAction != ActivateItemOnly) {
 713         if (m_view && m_model && m_view->supportsItemExpanding() && m_model->isExpandable(index.value_or(-1))) {
 714             const bool expanded = m_model->isExpanded(index.value());
 715             m_model->setExpanded(index.value(), !expanded);
 716         }
 717     }
 718
 719     if (event->button() & ~Qt::LeftButton) {
 720         return false;
 721     }
 722
 723     if (m_view->style()->styleHint(QStyle::SH_ItemView_ActivateItemOnSingleClick) || m_singleClickActivationEnforced) {
 724         return false;
 725     }
 726
 727     const bool emitItemActivated = index.has_value() && index.value() < m_model->count() && !m_view->isAboveExpansionToggle(index.value(), pos);
 728     if (emitItemActivated) {
 729         if (!QApplication::keyboardModifiers()) {
 730             m_selectionManager->clearSelection(); // The user does not want to manage/manipulate the item currently, only activate it.
 731         }
 732         Q_EMIT itemActivated(index.value());
 733     }
 734     return false;
 735 }
 736
 737 bool KItemListController::contextMenuEvent(QContextMenuEvent *event)
 738 {
 739     if (event->reason() == QContextMenuEvent::Keyboard) {
 740         // Emit the signal itemContextMenuRequested() if at least one item is selected.
 741         // Otherwise the signal viewContextMenuRequested() will be emitted.
 742         const KItemSet selectedItems = m_selectionManager->selectedItems();
 743         int index = -1;
 744         if (selectedItems.count() >= 2) {
 745             const int currentItemIndex = m_selectionManager->currentItem();
 746             index = selectedItems.contains(currentItemIndex) ? currentItemIndex : selectedItems.first();
 747         } else if (selectedItems.count() == 1) {
 748             index = selectedItems.first();
 749         }
 750
 751         if (index >= 0) {
 752             const QRectF contextRect = m_view->itemContextRect(index);
 753             const QPointF pos(m_view->scene()->views().first()->mapToGlobal(contextRect.bottomRight().toPoint()));
 754             Q_EMIT itemContextMenuRequested(index, pos);
 755         } else {
 756             Q_EMIT viewContextMenuRequested(event->globalPos());
 757         }
 758         return true;
 759     }
 760
 761     const auto pos = event->pos();
 762     const auto globalPos = event->globalPos();
 763
 764     if (m_view->headerBoundaries().contains(pos)) {
 765         Q_EMIT headerContextMenuRequested(globalPos);
 766         return true;
 767     }
 768
 769     const auto pressedItem = m_view->itemAt(pos);
 770     // We only open a context menu for the pressed item if it is selected.
 771     // 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.
 772     if (pressedItem && m_selectionManager->selectedItems().contains(pressedItem.value())) {
 773         // The selection rectangle for an item was clicked
 774         Q_EMIT itemContextMenuRequested(pressedItem.value(), globalPos);
 775         return true;
 776     }
 777
 778     // Remove any hover highlights so the context menu doesn't look like it applies to a row.
 779     const auto widgets = m_view->visibleItemListWidgets();
 780     for (KItemListWidget *widget : widgets) {
 781         if (widget->isHovered()) {
 782             widget->setHovered(false);
 783             Q_EMIT itemUnhovered(widget->index());
 784         }
 785     }
 786     Q_EMIT viewContextMenuRequested(globalPos);
 787     return true;
 788 }
 789
 790 bool KItemListController::dragEnterEvent(QGraphicsSceneDragDropEvent *event, const QTransform &transform)
 791 {
 792     Q_UNUSED(event)
 793     Q_UNUSED(transform)
 794
 795     DragAndDropHelper::clearUrlListMatchesUrlCache();
 796
 797     return false;
 798 }
 799
 800 bool KItemListController::dragLeaveEvent(QGraphicsSceneDragDropEvent *event, const QTransform &transform)
 801 {
 802     Q_UNUSED(event)
 803     Q_UNUSED(transform)
 804
 805     m_autoActivationTimer->stop();
 806     m_view->setAutoScroll(false);
 807     m_view->hideDropIndicator();
 808
 809     KItemListWidget *widget = hoveredWidget();
 810     if (widget) {
 811         widget->setHovered(false);
 812         Q_EMIT itemUnhovered(widget->index());
 813     }
 814     return false;
 815 }
 816
 817 bool KItemListController::dragMoveEvent(QGraphicsSceneDragDropEvent *event, const QTransform &transform)
 818 {
 819     if (!m_model || !m_view) {
 820         return false;
 821     }
 822
 823     QUrl hoveredDir = m_model->directory();
 824     KItemListWidget *oldHoveredWidget = hoveredWidget();
 825
 826     const QPointF pos = transform.map(event->pos());
 827     KItemListWidget *newHoveredWidget = widgetForDropPos(pos);
 828     int index = -1;
 829
 830     if (oldHoveredWidget != newHoveredWidget) {
 831         m_autoActivationTimer->stop();
 832
 833         if (oldHoveredWidget) {
 834             oldHoveredWidget->setHovered(false);
 835             Q_EMIT itemUnhovered(oldHoveredWidget->index());
 836         }
 837     }
 838
 839     if (newHoveredWidget) {
 840         bool droppingBetweenItems = false;
 841         if (m_model->sortRole().isEmpty()) {
 842             // The model supports inserting items between other items.
 843             droppingBetweenItems = (m_view->showDropIndicator(pos) >= 0);
 844         }
 845
 846         index = newHoveredWidget->index();
 847
 848         if (m_model->isDir(index)) {
 849             hoveredDir = m_model->url(index);
 850         }
 851
 852         if (!droppingBetweenItems) {
 853             // Something has been dragged on an item.
 854             m_view->hideDropIndicator();
 855             if (!newHoveredWidget->isHovered()) {
 856                 newHoveredWidget->setHovered(true);
 857                 Q_EMIT itemHovered(index);
 858             }
 859
 860             if (!m_autoActivationTimer->isActive() && m_autoActivationTimer->interval() >= 0 && m_model->canEnterOnHover(index)) {
 861                 m_autoActivationTimer->setProperty("index", index);
 862                 m_autoActivationTimer->start();
 863                 newHoveredWidget->startActivateSoonAnimation(m_autoActivationTimer->remainingTime());
 864             }
 865
 866         } else {
 867             m_autoActivationTimer->stop();
 868             if (newHoveredWidget && newHoveredWidget->isHovered()) {
 869                 newHoveredWidget->setHovered(false);
 870                 Q_EMIT itemUnhovered(index);
 871             }
 872         }
 873     } else {
 874         m_view->hideDropIndicator();
 875     }
 876
 877     if (DragAndDropHelper::urlListMatchesUrl(event->mimeData()->urls(), hoveredDir)) {
 878         event->setDropAction(Qt::IgnoreAction);
 879         event->ignore();
 880     } else {
 881         if (m_model->supportsDropping(index)) {
 882             event->setDropAction(event->proposedAction());
 883             event->accept();
 884         } else {
 885             event->setDropAction(Qt::IgnoreAction);
 886             event->ignore();
 887         }
 888     }
 889     return false;
 890 }
 891
 892 bool KItemListController::dropEvent(QGraphicsSceneDragDropEvent *event, const QTransform &transform)
 893 {
 894     if (!m_view) {
 895         return false;
 896     }
 897
 898     m_autoActivationTimer->stop();
 899     m_view->setAutoScroll(false);
 900
 901     const QPointF pos = transform.map(event->pos());
 902
 903     int dropAboveIndex = -1;
 904     if (m_model->sortRole().isEmpty()) {
 905         // The model supports inserting of items between other items.
 906         dropAboveIndex = m_view->showDropIndicator(pos);
 907     }
 908
 909     if (dropAboveIndex >= 0) {
 910         // Something has been dropped between two items.
 911         m_view->hideDropIndicator();
 912         Q_EMIT aboveItemDropEvent(dropAboveIndex, event);
 913     } else if (!event->mimeData()->hasFormat(m_model->blacklistItemDropEventMimeType())) {
 914         // Something has been dropped on an item or on an empty part of the view.
 915         const KItemListWidget *receivingWidget = widgetForDropPos(pos);
 916         if (receivingWidget) {
 917             Q_EMIT itemDropEvent(receivingWidget->index(), event);
 918         } else {
 919             Q_EMIT itemDropEvent(-1, event);
 920         }
 921     }
 922
 923     QAccessibleEvent accessibilityEvent(view(), QAccessible::DragDropEnd);
 924     QAccessible::updateAccessibility(&accessibilityEvent);
 925
 926     return true;
 927 }
 928
 929 bool KItemListController::hoverEnterEvent(QGraphicsSceneHoverEvent *event, const QTransform &transform)
 930 {
 931     Q_UNUSED(event)
 932     Q_UNUSED(transform)
 933     return false;
 934 }
 935
 936 bool KItemListController::hoverMoveEvent(QGraphicsSceneHoverEvent *event, const QTransform &transform)
 937 {
 938     Q_UNUSED(transform)
 939     if (!m_model || !m_view) {
 940         return false;
 941     }
 942
 943     // We identify the widget whose expansionArea had been hovered before this hoverMoveEvent() triggered.
 944     // we can't use hoveredWidget() here (it handles the icon+text rect, not the expansion rect)
 945     // like hoveredWidget(), we find the hovered widget for the expansion rect
 946     const auto visibleItemListWidgets = m_view->visibleItemListWidgets();
 947     const auto oldHoveredExpansionWidgetIterator = std::find_if(visibleItemListWidgets.begin(), visibleItemListWidgets.end(), [](auto &widget) {
 948         return widget->expansionAreaHovered();
 949     });
 950     const auto oldHoveredExpansionWidget =
 951         oldHoveredExpansionWidgetIterator == visibleItemListWidgets.end() ? std::nullopt : std::make_optional(*oldHoveredExpansionWidgetIterator);
 952
 953     const auto unhoverOldHoveredWidget = [&]() {
 954         if (auto oldHoveredWidget = hoveredWidget(); oldHoveredWidget) {
 955             // handle the text+icon one
 956             oldHoveredWidget->setHovered(false);
 957             Q_EMIT itemUnhovered(oldHoveredWidget->index());
 958         }
 959     };
 960
 961     const auto unhoverOldExpansionWidget = [&]() {
 962         if (oldHoveredExpansionWidget) {
 963             // then the expansion toggle
 964             (*oldHoveredExpansionWidget)->setExpansionAreaHovered(false);
 965         }
 966     };
 967
 968     const QPointF pos = transform.map(event->pos());
 969     if (KItemListWidget *newHoveredWidget = widgetForPos(pos); newHoveredWidget) {
 970         // something got hovered, work out which part and set hover for the appropriate widget
 971         const auto mappedPos = newHoveredWidget->mapFromItem(m_view, pos);
 972         const bool isOnExpansionToggle = newHoveredWidget->expansionToggleRect().contains(mappedPos);
 973
 974         if (isOnExpansionToggle) {
 975             // make sure we unhover the old one first if old!=new
 976             if (oldHoveredExpansionWidget && *oldHoveredExpansionWidget != newHoveredWidget) {
 977                 (*oldHoveredExpansionWidget)->setExpansionAreaHovered(false);
 978             }
 979             // 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)
 980             unhoverOldHoveredWidget();
 981
 982             newHoveredWidget->setExpansionAreaHovered(true);
 983         } else {
 984             // make sure we unhover the old one first if old!=new
 985             auto oldHoveredWidget = hoveredWidget();
 986             if (oldHoveredWidget && oldHoveredWidget != newHoveredWidget) {
 987                 oldHoveredWidget->setHovered(false);
 988                 Q_EMIT itemUnhovered(oldHoveredWidget->index());
 989             }
 990             // 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)
 991             unhoverOldExpansionWidget();
 992
 993             const bool isOverIconAndText = newHoveredWidget->iconRect().contains(mappedPos) || newHoveredWidget->textRect().contains(mappedPos);
 994             const bool hasMultipleSelection = m_selectionManager->selectedItems().count() > 1;
 995
 996             if (hasMultipleSelection && !isOverIconAndText) {
 997                 // In case we have multiple selections, clicking on any row will deselect the selection.
 998                 // So, as a visual cue for signalling that clicking anywhere won't select, but clear current highlights,
 999                 // we disable hover of the *row*(i.e. blank space to the right of the icon+text)
1000
1001                 // (no-op in this branch for masked hover)
1002             } else {
1003                 newHoveredWidget->setHoverPosition(mappedPos);
1004                 if (oldHoveredWidget != newHoveredWidget) {
1005                     newHoveredWidget->setHovered(true);
1006                     Q_EMIT itemHovered(newHoveredWidget->index());
1007                 }
1008             }
1009         }
1010     } else {
1011         // unhover any currently hovered expansion and text+icon widgets
1012         unhoverOldHoveredWidget();
1013         unhoverOldExpansionWidget();
1014     }
1015     return false;
1016 }
1017
1018 bool KItemListController::hoverLeaveEvent(QGraphicsSceneHoverEvent *event, const QTransform &transform)
1019 {
1020     Q_UNUSED(event)
1021     Q_UNUSED(transform)
1022
1023     m_mousePress = false;
1024     m_isTouchEvent = false;
1025
1026     if (!m_model || !m_view) {
1027         return false;
1028     }
1029
1030     const auto widgets = m_view->visibleItemListWidgets();
1031     for (KItemListWidget *widget : widgets) {
1032         if (widget->isHovered()) {
1033             widget->setHovered(false);
1034             Q_EMIT itemUnhovered(widget->index());
1035         }
1036     }
1037     return false;
1038 }
1039
1040 bool KItemListController::wheelEvent(QGraphicsSceneWheelEvent *event, const QTransform &transform)
1041 {
1042     Q_UNUSED(event)
1043     Q_UNUSED(transform)
1044     return false;
1045 }
1046
1047 bool KItemListController::resizeEvent(QGraphicsSceneResizeEvent *event, const QTransform &transform)
1048 {
1049     Q_UNUSED(event)
1050     Q_UNUSED(transform)
1051     return false;
1052 }
1053
1054 bool KItemListController::gestureEvent(QGestureEvent *event, const QTransform &transform)
1055 {
1056     if (!m_view) {
1057         return false;
1058     }
1059
1060     //you can touch on different views at the same time, but only one QWidget gets a mousePressEvent
1061     //we use this to get the right QWidget
1062     //the only exception is a tap gesture with state GestureStarted, we need to reset some variable
1063     if (!m_mousePress) {
1064         if (QGesture *tap = event->gesture(Qt::TapGesture)) {
1065             QTapGesture *tapGesture = static_cast<QTapGesture *>(tap);
1066             if (tapGesture->state() == Qt::GestureStarted) {
1067                 tapTriggered(tapGesture, transform);
1068             }
1069         }
1070         return false;
1071     }
1072
1073     bool accepted = false;
1074
1075     if (QGesture *tap = event->gesture(Qt::TapGesture)) {
1076         tapTriggered(static_cast<QTapGesture *>(tap), transform);
1077         accepted = true;
1078     }
1079     if (event->gesture(Qt::TapAndHoldGesture)) {
1080         tapAndHoldTriggered(event, transform);
1081         accepted = true;
1082     }
1083     if (event->gesture(Qt::PinchGesture)) {
1084         pinchTriggered(event, transform);
1085         accepted = true;
1086     }
1087     if (event->gesture(m_swipeGesture)) {
1088         swipeTriggered(event, transform);
1089         accepted = true;
1090     }
1091     if (event->gesture(m_twoFingerTapGesture)) {
1092         twoFingerTapTriggered(event, transform);
1093         accepted = true;
1094     }
1095     return accepted;
1096 }
1097
1098 bool KItemListController::touchBeginEvent(QTouchEvent *event, const QTransform &transform)
1099 {
1100     Q_UNUSED(event)
1101     Q_UNUSED(transform)
1102
1103     m_isTouchEvent = true;
1104     return false;
1105 }
1106
1107 void KItemListController::tapTriggered(QTapGesture *tap, const QTransform &transform)
1108 {
1109     static bool scrollerWasActive = false;
1110
1111     if (tap->state() == Qt::GestureStarted) {
1112         m_dragActionOrRightClick = false;
1113         m_isSwipeGesture = false;
1114         m_pinchGestureInProgress = false;
1115         scrollerWasActive = m_scrollerIsScrolling;
1116     }
1117
1118     if (tap->state() == Qt::GestureFinished) {
1119         m_mousePress = false;
1120
1121         //if at the moment of the gesture start the QScroller was active, the user made the tap
1122         //to stop the QScroller and not to tap on an item
1123         if (scrollerWasActive) {
1124             return;
1125         }
1126
1127         if (m_view->m_tapAndHoldIndicator->isActive()) {
1128             m_view->m_tapAndHoldIndicator->setActive(false);
1129         }
1130
1131         const QPointF pressedMousePos = transform.map(tap->position());
1132         m_pressedIndex = m_view->itemAt(pressedMousePos);
1133         if (m_dragActionOrRightClick) {
1134             m_dragActionOrRightClick = false;
1135         } else {
1136             onPress(tap->position().toPoint(), Qt::NoModifier, Qt::LeftButton);
1137             onRelease(transform.map(tap->position()), Qt::NoModifier, Qt::LeftButton, true);
1138         }
1139         m_isTouchEvent = false;
1140     }
1141 }
1142
1143 void KItemListController::tapAndHoldTriggered(QGestureEvent *event, const QTransform &transform)
1144 {
1145     //the Qt TabAndHold gesture is triggerable with a mouse click, we don't want this
1146     if (!m_isTouchEvent) {
1147         return;
1148     }
1149
1150     const QTapAndHoldGesture *tap = static_cast<QTapAndHoldGesture *>(event->gesture(Qt::TapAndHoldGesture));
1151     if (tap->state() == Qt::GestureFinished) {
1152         //if a pinch gesture is in progress we don't want a TabAndHold gesture
1153         if (m_pinchGestureInProgress) {
1154             return;
1155         }
1156         const QPointF pressedMousePos = transform.map(event->mapToGraphicsScene(tap->position()));
1157         m_pressedIndex = m_view->itemAt(pressedMousePos);
1158         if (m_pressedIndex.has_value()) {
1159             if (!m_selectionManager->isSelected(m_pressedIndex.value())) {
1160                 m_selectionManager->clearSelection();
1161                 m_selectionManager->setSelected(m_pressedIndex.value());
1162             }
1163             if (!m_selectionMode) {
1164                 Q_EMIT selectionModeChangeRequested(true);
1165             }
1166         } else {
1167             m_selectionManager->clearSelection();
1168             startRubberBand();
1169         }
1170
1171         Q_EMIT scrollerStop();
1172
1173         m_view->m_tapAndHoldIndicator->setStartPosition(pressedMousePos);
1174         m_view->m_tapAndHoldIndicator->setActive(true);
1175
1176         m_dragActionOrRightClick = true;
1177     }
1178 }
1179
1180 void KItemListController::pinchTriggered(QGestureEvent *event, const QTransform &transform)
1181 {
1182     Q_UNUSED(transform)
1183
1184     const QPinchGesture *pinch = static_cast<QPinchGesture *>(event->gesture(Qt::PinchGesture));
1185     const qreal sensitivityModifier = 0.2;
1186     static qreal counter = 0;
1187
1188     if (pinch->state() == Qt::GestureStarted) {
1189         m_pinchGestureInProgress = true;
1190         counter = 0;
1191     }
1192     if (pinch->state() == Qt::GestureUpdated) {
1193         //if a swipe gesture was recognized or in progress, we don't want a pinch gesture to change the zoom
1194         if (m_isSwipeGesture) {
1195             return;
1196         }
1197         counter = counter + (pinch->scaleFactor() - 1);
1198         if (counter >= sensitivityModifier) {
1199             Q_EMIT increaseZoom();
1200             counter = 0;
1201         } else if (counter <= -sensitivityModifier) {
1202             Q_EMIT decreaseZoom();
1203             counter = 0;
1204         }
1205     }
1206 }
1207
1208 void KItemListController::swipeTriggered(QGestureEvent *event, const QTransform &transform)
1209 {
1210     Q_UNUSED(transform)
1211
1212     const KTwoFingerSwipe *swipe = static_cast<KTwoFingerSwipe *>(event->gesture(m_swipeGesture));
1213
1214     if (!swipe) {
1215         return;
1216     }
1217     if (swipe->state() == Qt::GestureStarted) {
1218         m_isSwipeGesture = true;
1219     }
1220
1221     if (swipe->state() == Qt::GestureCanceled) {
1222         m_isSwipeGesture = false;
1223     }
1224
1225     if (swipe->state() == Qt::GestureFinished) {
1226         Q_EMIT scrollerStop();
1227
1228         if (swipe->swipeAngle() <= 20 || swipe->swipeAngle() >= 340) {
1229             Q_EMIT mouseButtonPressed(m_pressedIndex.value_or(-1), Qt::BackButton);
1230         } else if (swipe->swipeAngle() <= 200 && swipe->swipeAngle() >= 160) {
1231             Q_EMIT mouseButtonPressed(m_pressedIndex.value_or(-1), Qt::ForwardButton);
1232         } else if (swipe->swipeAngle() <= 110 && swipe->swipeAngle() >= 60) {
1233             Q_EMIT swipeUp();
1234         }
1235         m_isSwipeGesture = true;
1236     }
1237 }
1238
1239 void KItemListController::twoFingerTapTriggered(QGestureEvent *event, const QTransform &transform)
1240 {
1241     const KTwoFingerTap *twoTap = static_cast<KTwoFingerTap *>(event->gesture(m_twoFingerTapGesture));
1242
1243     if (!twoTap) {
1244         return;
1245     }
1246
1247     if (twoTap->state() == Qt::GestureStarted) {
1248         const QPointF pressedMousePos = transform.map(twoTap->pos());
1249         m_pressedIndex = m_view->itemAt(pressedMousePos);
1250         if (m_pressedIndex.has_value()) {
1251             onPress(twoTap->pos().toPoint(), Qt::ControlModifier, Qt::LeftButton);
1252             onRelease(transform.map(twoTap->pos()), Qt::ControlModifier, Qt::LeftButton, false);
1253         }
1254     }
1255 }
1256
1257 bool KItemListController::processEvent(QEvent *event, const QTransform &transform)
1258 {
1259     if (!event) {
1260         return false;
1261     }
1262
1263     switch (event->type()) {
1264     case QEvent::KeyPress:
1265         return keyPressEvent(static_cast<QKeyEvent *>(event));
1266     case QEvent::InputMethod:
1267         return inputMethodEvent(static_cast<QInputMethodEvent *>(event));
1268     case QEvent::GraphicsSceneMousePress:
1269         return mousePressEvent(static_cast<QGraphicsSceneMouseEvent *>(event), QTransform());
1270     case QEvent::GraphicsSceneMouseMove:
1271         return mouseMoveEvent(static_cast<QGraphicsSceneMouseEvent *>(event), QTransform());
1272     case QEvent::GraphicsSceneMouseRelease:
1273         return mouseReleaseEvent(static_cast<QGraphicsSceneMouseEvent *>(event), QTransform());
1274     case QEvent::GraphicsSceneMouseDoubleClick:
1275         return mouseDoubleClickEvent(static_cast<QGraphicsSceneMouseEvent *>(event), QTransform());
1276     case QEvent::ContextMenu:
1277         return contextMenuEvent(static_cast<QContextMenuEvent *>(event));
1278     case QEvent::GraphicsSceneWheel:
1279         return wheelEvent(static_cast<QGraphicsSceneWheelEvent *>(event), QTransform());
1280     case QEvent::GraphicsSceneDragEnter:
1281         return dragEnterEvent(static_cast<QGraphicsSceneDragDropEvent *>(event), QTransform());
1282     case QEvent::GraphicsSceneDragLeave:
1283         return dragLeaveEvent(static_cast<QGraphicsSceneDragDropEvent *>(event), QTransform());
1284     case QEvent::GraphicsSceneDragMove:
1285         return dragMoveEvent(static_cast<QGraphicsSceneDragDropEvent *>(event), QTransform());
1286     case QEvent::GraphicsSceneDrop:
1287         return dropEvent(static_cast<QGraphicsSceneDragDropEvent *>(event), QTransform());
1288     case QEvent::GraphicsSceneHoverEnter:
1289         return hoverEnterEvent(static_cast<QGraphicsSceneHoverEvent *>(event), QTransform());
1290     case QEvent::GraphicsSceneHoverMove:
1291         return hoverMoveEvent(static_cast<QGraphicsSceneHoverEvent *>(event), QTransform());
1292     case QEvent::GraphicsSceneHoverLeave:
1293         return hoverLeaveEvent(static_cast<QGraphicsSceneHoverEvent *>(event), QTransform());
1294     case QEvent::GraphicsSceneResize:
1295         return resizeEvent(static_cast<QGraphicsSceneResizeEvent *>(event), transform);
1296     case QEvent::Gesture:
1297         return gestureEvent(static_cast<QGestureEvent *>(event), transform);
1298     case QEvent::TouchBegin:
1299         return touchBeginEvent(static_cast<QTouchEvent *>(event), transform);
1300     default:
1301         break;
1302     }
1303
1304     return false;
1305 }
1306
1307 void KItemListController::slotViewScrollOffsetChanged(qreal current, qreal previous)
1308 {
1309     if (!m_view) {
1310         return;
1311     }
1312
1313     KItemListRubberBand *rubberBand = m_view->rubberBand();
1314     if (rubberBand->isActive()) {
1315         const qreal diff = current - previous;
1316         // TODO: Ideally just QCursor::pos() should be used as
1317         // new end-position but it seems there is no easy way
1318         // to have something like QWidget::mapFromGlobal() for QGraphicsWidget
1319         // (... or I just missed an easy way to do the mapping)
1320         QPointF endPos = rubberBand->endPosition();
1321         if (m_view->scrollOrientation() == Qt::Vertical) {
1322             endPos.ry() += diff;
1323         } else {
1324             endPos.rx() += diff;
1325         }
1326
1327         rubberBand->setEndPosition(endPos);
1328     }
1329 }
1330
1331 void KItemListController::slotRubberBandChanged()
1332 {
1333     if (!m_view || !m_model || m_model->count() <= 0) {
1334         return;
1335     }
1336
1337     const KItemListRubberBand *rubberBand = m_view->rubberBand();
1338     const QPointF startPos = rubberBand->startPosition();
1339     const QPointF endPos = rubberBand->endPosition();
1340     QRectF rubberBandRect = QRectF(startPos, endPos).normalized();
1341
1342     const bool scrollVertical = (m_view->scrollOrientation() == Qt::Vertical);
1343     if (scrollVertical) {
1344         rubberBandRect.translate(0, -m_view->scrollOffset());
1345     } else {
1346         rubberBandRect.translate(-m_view->scrollOffset(), 0);
1347     }
1348
1349     if (!m_oldSelection.isEmpty()) {
1350         // Clear the old selection that was available before the rubberband has
1351         // been activated in case if no Shift- or Control-key are pressed
1352         const bool shiftOrControlPressed = QApplication::keyboardModifiers() & Qt::ShiftModifier || QApplication::keyboardModifiers() & Qt::ControlModifier;
1353         if (!shiftOrControlPressed && !m_selectionMode) {
1354             m_oldSelection.clear();
1355         }
1356     }
1357
1358     KItemSet selectedItems;
1359
1360     // Select all visible items that intersect with the rubberband
1361     const auto widgets = m_view->visibleItemListWidgets();
1362     for (const KItemListWidget *widget : widgets) {
1363         const int index = widget->index();
1364
1365         const QRectF widgetRect = m_view->itemRect(index);
1366         if (widgetRect.intersects(rubberBandRect)) {
1367             // Select the full row intersecting with the rubberband rectangle
1368             const QRectF selectionRect = widget->selectionRect().translated(widgetRect.topLeft());
1369             const QRectF iconRect = widget->iconRect().translated(widgetRect.topLeft());
1370             if (selectionRect.intersects(rubberBandRect) || iconRect.intersects(rubberBandRect)) {
1371                 selectedItems.insert(index);
1372             }
1373         }
1374     }
1375
1376     // Select all invisible items that intersect with the rubberband. Instead of
1377     // iterating all items only the area which might be touched by the rubberband
1378     // will be checked.
1379     const bool increaseIndex = scrollVertical ? startPos.y() > endPos.y() : startPos.x() > endPos.x();
1380
1381     int index = increaseIndex ? m_view->lastVisibleIndex() + 1 : m_view->firstVisibleIndex() - 1;
1382     bool selectionFinished = false;
1383     do {
1384         const QRectF widgetRect = m_view->itemRect(index);
1385         if (widgetRect.intersects(rubberBandRect)) {
1386             selectedItems.insert(index);
1387         }
1388
1389         if (increaseIndex) {
1390             ++index;
1391             selectionFinished = (index >= m_model->count()) || (scrollVertical && widgetRect.top() > rubberBandRect.bottom())
1392                 || (!scrollVertical && widgetRect.left() > rubberBandRect.right());
1393         } else {
1394             --index;
1395             selectionFinished = (index < 0) || (scrollVertical && widgetRect.bottom() < rubberBandRect.top())
1396                 || (!scrollVertical && widgetRect.right() < rubberBandRect.left());
1397         }
1398     } while (!selectionFinished);
1399
1400     if ((QApplication::keyboardModifiers() & Qt::ControlModifier) || m_selectionMode) {
1401         // If Control is pressed, the selection state of all items in the rubberband is toggled.
1402         // Therefore, the new selection contains:
1403         // 1. All previously selected items which are not inside the rubberband, and
1404         // 2. all items inside the rubberband which have not been selected previously.
1405         m_selectionManager->setSelectedItems(m_oldSelection ^ selectedItems);
1406     } else {
1407         m_selectionManager->setSelectedItems(selectedItems + m_oldSelection);
1408     }
1409 }
1410
1411 void KItemListController::startDragging()
1412 {
1413     if (!m_view || !m_model) {
1414         return;
1415     }
1416
1417     const KItemSet selectedItems = m_selectionManager->selectedItems();
1418     if (selectedItems.isEmpty()) {
1419         return;
1420     }
1421
1422     QMimeData *data = m_model->createMimeData(selectedItems);
1423     if (!data) {
1424         return;
1425     }
1426     KUrlMimeData::exportUrlsToPortal(data);
1427
1428     // The created drag object will be owned and deleted
1429     // by QApplication::activeWindow().
1430     QDrag *drag = new QDrag(QApplication::activeWindow());
1431     drag->setMimeData(data);
1432
1433     const QPixmap pixmap = m_view->createDragPixmap(selectedItems);
1434     drag->setPixmap(pixmap);
1435
1436     const QPoint hotSpot((pixmap.width() / pixmap.devicePixelRatio()) / 2, 0);
1437     drag->setHotSpot(hotSpot);
1438
1439     drag->exec(Qt::MoveAction | Qt::CopyAction | Qt::LinkAction, Qt::CopyAction);
1440
1441     QAccessibleEvent accessibilityEvent(view(), QAccessible::DragDropStart);
1442     QAccessible::updateAccessibility(&accessibilityEvent);
1443 }
1444
1445 KItemListWidget *KItemListController::hoveredWidget() const
1446 {
1447     Q_ASSERT(m_view);
1448
1449     const auto widgets = m_view->visibleItemListWidgets();
1450     for (KItemListWidget *widget : widgets) {
1451         if (widget->isHovered()) {
1452             return widget;
1453         }
1454     }
1455
1456     return nullptr;
1457 }
1458
1459 KItemListWidget *KItemListController::widgetForPos(const QPointF &pos) const
1460 {
1461     Q_ASSERT(m_view);
1462
1463     if (m_view->headerBoundaries().contains(pos)) {
1464         return nullptr;
1465     }
1466
1467     const auto widgets = m_view->visibleItemListWidgets();
1468     for (KItemListWidget *widget : widgets) {
1469         const QPointF mappedPos = widget->mapFromItem(m_view, pos);
1470         if (widget->contains(mappedPos) || widget->selectionRect().contains(mappedPos)) {
1471             return widget;
1472         }
1473     }
1474
1475     return nullptr;
1476 }
1477
1478 KItemListWidget *KItemListController::widgetForDropPos(const QPointF &pos) const
1479 {
1480     Q_ASSERT(m_view);
1481
1482     if (m_view->headerBoundaries().contains(pos)) {
1483         return nullptr;
1484     }
1485
1486     const auto widgets = m_view->visibleItemListWidgets();
1487     for (KItemListWidget *widget : widgets) {
1488         const QPointF mappedPos = widget->mapFromItem(m_view, pos);
1489         if (widget->contains(mappedPos)) {
1490             return widget;
1491         }
1492     }
1493
1494     return nullptr;
1495 }
1496
1497 void KItemListController::updateKeyboardAnchor()
1498 {
1499     const bool validAnchor =
1500         m_keyboardAnchorIndex >= 0 && m_keyboardAnchorIndex < m_model->count() && keyboardAnchorPos(m_keyboardAnchorIndex) == m_keyboardAnchorPos;
1501     if (!validAnchor) {
1502         const int index = m_selectionManager->currentItem();
1503         m_keyboardAnchorIndex = index;
1504         m_keyboardAnchorPos = keyboardAnchorPos(index);
1505     }
1506 }
1507
1508 int KItemListController::nextRowIndex(int index) const
1509 {
1510     if (m_keyboardAnchorIndex < 0) {
1511         return index;
1512     }
1513
1514     const int maxIndex = m_model->count() - 1;
1515     if (index == maxIndex) {
1516         return index;
1517     }
1518
1519     const bool reversed = m_view->layoutDirection() == Qt::RightToLeft && m_view->scrollOrientation() == Qt::Vertical;
1520
1521     // Calculate the index of the last column inside the row of the current index
1522     int lastColumnIndex = index;
1523     while ((!reversed && keyboardAnchorPos(lastColumnIndex + 1) > keyboardAnchorPos(lastColumnIndex))
1524            || (reversed && keyboardAnchorPos(lastColumnIndex + 1) < keyboardAnchorPos(lastColumnIndex))) {
1525         ++lastColumnIndex;
1526         if (lastColumnIndex >= maxIndex) {
1527             return index;
1528         }
1529     }
1530
1531     // Based on the last column index go to the next row and calculate the nearest index
1532     // that is below the current index
1533     int nextRowIndex = lastColumnIndex + 1;
1534     int searchIndex = nextRowIndex;
1535     qreal minDiff = qAbs(m_keyboardAnchorPos - keyboardAnchorPos(nextRowIndex));
1536     while (searchIndex < maxIndex
1537            && ((!reversed && keyboardAnchorPos(searchIndex + 1) > keyboardAnchorPos(searchIndex))
1538                || (reversed && keyboardAnchorPos(searchIndex + 1) < keyboardAnchorPos(searchIndex)))) {
1539         ++searchIndex;
1540         const qreal searchDiff = qAbs(m_keyboardAnchorPos - keyboardAnchorPos(searchIndex));
1541         if (searchDiff < minDiff) {
1542             minDiff = searchDiff;
1543             nextRowIndex = searchIndex;
1544         }
1545     }
1546
1547     return nextRowIndex;
1548 }
1549
1550 int KItemListController::previousRowIndex(int index) const
1551 {
1552     if (m_keyboardAnchorIndex < 0 || index == 0) {
1553         return index;
1554     }
1555
1556     const bool reversed = m_view->layoutDirection() == Qt::RightToLeft && m_view->scrollOrientation() == Qt::Vertical;
1557
1558     // Calculate the index of the first column inside the row of the current index
1559     int firstColumnIndex = index;
1560     while ((!reversed && keyboardAnchorPos(firstColumnIndex - 1) < keyboardAnchorPos(firstColumnIndex))
1561            || (reversed && keyboardAnchorPos(firstColumnIndex - 1) > keyboardAnchorPos(firstColumnIndex))) {
1562         --firstColumnIndex;
1563         if (firstColumnIndex <= 0) {
1564             return index;
1565         }
1566     }
1567
1568     // Based on the first column index go to the previous row and calculate the nearest index
1569     // that is above the current index
1570     int previousRowIndex = firstColumnIndex - 1;
1571     int searchIndex = previousRowIndex;
1572     qreal minDiff = qAbs(m_keyboardAnchorPos - keyboardAnchorPos(previousRowIndex));
1573     while (searchIndex > 0
1574            && ((!reversed && keyboardAnchorPos(searchIndex - 1) < keyboardAnchorPos(searchIndex))
1575                || (reversed && keyboardAnchorPos(searchIndex - 1) > keyboardAnchorPos(searchIndex)))) {
1576         --searchIndex;
1577         const qreal searchDiff = qAbs(m_keyboardAnchorPos - keyboardAnchorPos(searchIndex));
1578         if (searchDiff < minDiff) {
1579             minDiff = searchDiff;
1580             previousRowIndex = searchIndex;
1581         }
1582     }
1583
1584     return previousRowIndex;
1585 }
1586
1587 qreal KItemListController::keyboardAnchorPos(int index) const
1588 {
1589     const QRectF itemRect = m_view->itemRect(index);
1590     if (!itemRect.isEmpty()) {
1591         return (m_view->scrollOrientation() == Qt::Vertical) ? itemRect.x() : itemRect.y();
1592     }
1593
1594     return 0;
1595 }
1596
1597 void KItemListController::updateExtendedSelectionRegion()
1598 {
1599     if (m_view) {
1600         const bool extend = (m_selectionBehavior != MultiSelection);
1601         KItemListStyleOption option = m_view->styleOption();
1602         if (option.extendedSelectionRegion != extend) {
1603             option.extendedSelectionRegion = extend;
1604             m_view->setStyleOption(option);
1605         }
1606     }
1607 }
1608
1609 bool KItemListController::onPress(const QPointF &pos, const Qt::KeyboardModifiers modifiers, const Qt::MouseButtons buttons)
1610 {
1611     Q_EMIT mouseButtonPressed(m_pressedIndex.value_or(-1), buttons);
1612
1613     if (buttons & (Qt::BackButton | Qt::ForwardButton)) {
1614         // Do not select items when clicking the back/forward buttons, see
1615         // https://bugs.kde.org/show_bug.cgi?id=327412.
1616         return true;
1617     }
1618
1619     const QPointF pressedMousePos = m_view->transform().map(pos);
1620
1621     if (m_view->isAboveExpansionToggle(m_pressedIndex.value_or(-1), pressedMousePos)) {
1622         m_selectionManager->endAnchoredSelection();
1623         m_selectionManager->setCurrentItem(m_pressedIndex.value());
1624         m_selectionManager->beginAnchoredSelection(m_pressedIndex.value());
1625         return true;
1626     }
1627
1628     m_selectionTogglePressed = m_view->isAboveSelectionToggle(m_pressedIndex.value_or(-1), pressedMousePos);
1629     if (m_selectionTogglePressed) {
1630         m_selectionManager->setSelected(m_pressedIndex.value(), 1, KItemListSelectionManager::Toggle);
1631         // The previous anchored selection has been finished already in
1632         // KItemListSelectionManager::setSelected(). We can safely change
1633         // the current item and start a new anchored selection now.
1634         m_selectionManager->setCurrentItem(m_pressedIndex.value());
1635         m_selectionManager->beginAnchoredSelection(m_pressedIndex.value());
1636         return true;
1637     }
1638
1639     const bool shiftPressed = modifiers & Qt::ShiftModifier;
1640     const bool controlPressed = (modifiers & Qt::ControlModifier) || m_selectionMode; // Keeping selectionMode similar to pressing control will hopefully
1641                                                                                       // simplify the overall logic and possibilities both for users and devs.
1642     const bool leftClick = buttons & Qt::LeftButton;
1643     const bool rightClick = buttons & Qt::RightButton;
1644
1645     // The previous selection is cleared if either
1646     // 1. The selection mode is SingleSelection, or
1647     // 2. the selection mode is MultiSelection, and *none* of the following conditions are met:
1648     //    a) Shift or Control are pressed.
1649     //    b) The clicked item is selected already. In that case, the user might want to:
1650     //       - start dragging multiple items, or
1651     //       - open the context menu and perform an action for all selected items.
1652     const bool shiftOrControlPressed = shiftPressed || controlPressed;
1653     const bool pressedItemAlreadySelected = m_pressedIndex.has_value() && m_selectionManager->isSelected(m_pressedIndex.value());
1654     const bool clearSelection = m_selectionBehavior == SingleSelection || (!shiftOrControlPressed && !pressedItemAlreadySelected);
1655
1656     // When this method returns false, a rubberBand selection is created using KItemListController::startRubberBand via the caller.
1657     if (clearSelection) {
1658         const int selectedItemsCount = m_selectionManager->selectedItems().count();
1659         m_selectionManager->clearSelection();
1660         // clear and bail when we got an existing multi-selection
1661         if (selectedItemsCount > 1 && m_pressedIndex.has_value()) {
1662             const auto row = m_view->m_visibleItems.value(m_pressedIndex.value());
1663             const auto mappedPos = row->mapFromItem(m_view, pos);
1664             if (pressedItemAlreadySelected || row->iconRect().contains(mappedPos) || row->textRect().contains(mappedPos)) {
1665                 // we are indeed inside the text/icon rect, keep m_pressedIndex what it is
1666                 // and short-circuit for single-click activation (it will then propagate to onRelease and activate the item)
1667                 // or we just keep going for double-click activation
1668                 if (m_view->style()->styleHint(QStyle::SH_ItemView_ActivateItemOnSingleClick) || m_singleClickActivationEnforced) {
1669                     if (!pressedItemAlreadySelected) {
1670                         // An unselected item was clicked directly while deselecting multiple other items so we mark it "current".
1671                         m_selectionManager->setCurrentItem(m_pressedIndex.value());
1672                         m_selectionManager->beginAnchoredSelection(m_pressedIndex.value());
1673                         if (!leftClick) {
1674                             // We select the item here because this press is not meant to directly activate the item.
1675                             // We do not want to select items unless the user wants to edit them.
1676                             m_selectionManager->setSelected(m_pressedIndex.value(), 1, KItemListSelectionManager::Toggle);
1677                         }
1678                     }
1679                     return true; // event handled, don't create rubber band
1680                 }
1681             } else {
1682                 // we're not inside the text/icon rect, as we've already cleared the selection
1683                 // we can just stop here and make sure handlers down the line (i.e. onRelease) don't activate
1684                 m_pressedIndex.reset();
1685                 // we don't stop event propagation and proceed to create a rubber band and let onRelease
1686                 // decide (based on m_pressedIndex) whether we're in a drag (drag => new rubber band, click => don't select the item)
1687                 return false;
1688             }
1689         }
1690     } else if (pressedItemAlreadySelected && !shiftOrControlPressed && leftClick) {
1691         // The user might want to start dragging multiple items, but if he clicks the item
1692         // in order to trigger it instead, the other selected items must be deselected.
1693         // However, we do not know yet what the user is going to do.
1694         // -> remember that the user pressed an item which had been selected already and
1695         //    clear the selection in mouseReleaseEvent(), unless the items are dragged.
1696         m_clearSelectionIfItemsAreNotDragged = true;
1697
1698         if (m_selectionManager->selectedItems().count() == 1 && m_view->isAboveText(m_pressedIndex.value_or(-1), pressedMousePos)) {
1699             Q_EMIT selectedItemTextPressed(m_pressedIndex.value_or(-1));
1700         }
1701     }
1702
1703     if (!shiftPressed) {
1704         // Finish the anchored selection before the current index is changed
1705         m_selectionManager->endAnchoredSelection();
1706     }
1707
1708     if (rightClick) {
1709         // Stop rubber band from persisting after right-clicks
1710         KItemListRubberBand *rubberBand = m_view->rubberBand();
1711         if (rubberBand->isActive()) {
1712             disconnect(rubberBand, &KItemListRubberBand::endPositionChanged, this, &KItemListController::slotRubberBandChanged);
1713             rubberBand->setActive(false);
1714             m_view->setAutoScroll(false);
1715         }
1716
1717         if (!m_pressedIndex.has_value()) {
1718             // We have a right-click in an empty region, don't create rubber band.
1719             return true;
1720         }
1721     }
1722
1723     if (m_pressedIndex.has_value()) {
1724         // The hover highlight area of an item is being pressed.
1725         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
1726         const bool hitTargetIsRowEmptyRegion = !row->contains(row->mapFromItem(m_view, pos));
1727         // again, when this method returns false, a rubberBand selection is created as the event is not consumed;
1728         // createRubberBand here tells us whether to return true or false.
1729         bool createRubberBand = (hitTargetIsRowEmptyRegion && m_selectionManager->selectedItems().isEmpty());
1730
1731         if (rightClick && hitTargetIsRowEmptyRegion) {
1732             // We have a right click outside the icon and text rect but within the hover highlight area.
1733             // We don't want items to get selected through this, so we return now.
1734             return true;
1735         }
1736
1737         m_selectionManager->setCurrentItem(m_pressedIndex.value());
1738
1739         switch (m_selectionBehavior) {
1740         case NoSelection:
1741             break;
1742
1743         case SingleSelection:
1744             if (!leftClick || shiftOrControlPressed
1745                 || (!m_view->style()->styleHint(QStyle::SH_ItemView_ActivateItemOnSingleClick) && !m_singleClickActivationEnforced)) {
1746                 m_selectionManager->setSelected(m_pressedIndex.value());
1747             }
1748             break;
1749
1750         case MultiSelection:
1751             if (controlPressed && !shiftPressed && leftClick) {
1752                 // A left mouse button press is happening on an item while control is pressed. This either means a user wants to:
1753                 // - toggle the selection of item(s) or
1754                 // - they want to begin a drag on the item(s) to copy them.
1755                 // We rule out the latter, if the item is not clicked directly and was unselected previously.
1756                 const auto row = m_view->m_visibleItems.value(m_pressedIndex.value());
1757                 const auto mappedPos = row->mapFromItem(m_view, pos);
1758                 if (!row->iconRect().contains(mappedPos) && !row->textRect().contains(mappedPos) && !pressedItemAlreadySelected) {
1759                     createRubberBand = true;
1760                 } else {
1761                     m_selectionManager->setSelected(m_pressedIndex.value(), 1, KItemListSelectionManager::Toggle);
1762                     m_selectionManager->beginAnchoredSelection(m_pressedIndex.value());
1763                     createRubberBand = false; // multi selection, don't propagate any further
1764                     // This will be the start of an item drag-to-copy operation if the user now moves the mouse before releasing the mouse button.
1765                 }
1766             } else if (!shiftPressed || !m_selectionManager->isAnchoredSelectionActive()) {
1767                 // Select the pressed item and start a new anchored selection
1768                 if (!leftClick || shiftOrControlPressed
1769                     || (!m_view->style()->styleHint(QStyle::SH_ItemView_ActivateItemOnSingleClick) && !m_singleClickActivationEnforced)) {
1770                     m_selectionManager->setSelected(m_pressedIndex.value(), 1, KItemListSelectionManager::Select);
1771                 }
1772                 m_selectionManager->beginAnchoredSelection(m_pressedIndex.value());
1773             }
1774             break;
1775
1776         default:
1777             Q_ASSERT(false);
1778             break;
1779         }
1780
1781         return !createRubberBand;
1782     }
1783
1784     return false;
1785 }
1786
1787 bool KItemListController::onRelease(const QPointF &pos, const Qt::KeyboardModifiers modifiers, const Qt::MouseButtons buttons, bool touch)
1788 {
1789     const QPointF pressedMousePos = pos;
1790     const bool isAboveSelectionToggle = m_view->isAboveSelectionToggle(m_pressedIndex.value_or(-1), pressedMousePos);
1791     if (isAboveSelectionToggle) {
1792         m_selectionTogglePressed = false;
1793         return true;
1794     }
1795
1796     if (!isAboveSelectionToggle && m_selectionTogglePressed) {
1797         m_selectionManager->setSelected(m_pressedIndex.value_or(-1), 1, KItemListSelectionManager::Toggle);
1798         m_selectionTogglePressed = false;
1799         return true;
1800     }
1801
1802     const bool controlPressed = modifiers & Qt::ControlModifier;
1803     const bool shiftOrControlPressed = modifiers & Qt::ShiftModifier || controlPressed;
1804
1805     const std::optional<int> index = m_view->itemAt(pos);
1806
1807     KItemListRubberBand *rubberBand = m_view->rubberBand();
1808     bool rubberBandRelease = false;
1809     if (rubberBand->isActive()) {
1810         disconnect(rubberBand, &KItemListRubberBand::endPositionChanged, this, &KItemListController::slotRubberBandChanged);
1811         rubberBand->setActive(false);
1812         m_oldSelection.clear();
1813         m_view->setAutoScroll(false);
1814         rubberBandRelease = true;
1815         // We check for actual rubber band drag here: if delta between start and end is less than drag threshold,
1816         // then we have a single click on one of the rows
1817         if ((rubberBand->endPosition() - rubberBand->startPosition()).manhattanLength() < QApplication::startDragDistance()) {
1818             rubberBandRelease = false; // since we're only selecting, unmark rubber band release flag
1819             // m_pressedIndex will have no value if we came from a multi-selection clearing onPress
1820             // in that case, we don't select anything
1821             if (index.has_value() && m_pressedIndex.has_value()) {
1822                 if (controlPressed && m_selectionBehavior == MultiSelection) {
1823                     m_selectionManager->setSelected(m_pressedIndex.value(), 1, KItemListSelectionManager::Toggle);
1824                 } else {
1825                     m_selectionManager->setSelected(index.value());
1826                 }
1827                 if (!m_selectionManager->isAnchoredSelectionActive()) {
1828                     m_selectionManager->beginAnchoredSelection(index.value());
1829                 }
1830             }
1831         }
1832     }
1833
1834     if (index.has_value() && index == m_pressedIndex) {
1835         // The release event is done above the same item as the press event
1836
1837         if (m_clearSelectionIfItemsAreNotDragged) {
1838             // A selected item has been clicked, but no drag operation has been started
1839             // -> clear the rest of the selection.
1840             m_selectionManager->clearSelection();
1841             m_selectionManager->setSelected(m_pressedIndex.value(), 1, KItemListSelectionManager::Select);
1842             m_selectionManager->beginAnchoredSelection(m_pressedIndex.value());
1843         }
1844
1845         if (buttons & Qt::LeftButton) {
1846             bool emitItemActivated = true;
1847             if (m_view->isAboveExpansionToggle(index.value(), pos)) {
1848                 const bool expanded = m_model->isExpanded(index.value());
1849                 m_model->setExpanded(index.value(), !expanded);
1850
1851                 Q_EMIT itemExpansionToggleClicked(index.value());
1852                 emitItemActivated = false;
1853             } else if (shiftOrControlPressed && m_selectionBehavior != SingleSelection) {
1854                 // The mouse click should only update the selection, not trigger the item, except when
1855                 // we are in single selection mode
1856                 emitItemActivated = false;
1857             } else {
1858                 const bool singleClickActivation = m_view->style()->styleHint(QStyle::SH_ItemView_ActivateItemOnSingleClick) || m_singleClickActivationEnforced;
1859                 if (!singleClickActivation) {
1860                     emitItemActivated = touch && !m_selectionMode;
1861                 } else {
1862                     // activate on single click only if we didn't come from a rubber band release
1863                     emitItemActivated = !rubberBandRelease;
1864                 }
1865             }
1866             if (emitItemActivated) {
1867                 Q_EMIT itemActivated(index.value());
1868             }
1869         } else if (buttons & Qt::MiddleButton) {
1870             Q_EMIT itemMiddleClicked(index.value());
1871         }
1872     }
1873
1874     m_pressedMouseGlobalPos = QPointF();
1875     m_pressedIndex = std::nullopt;
1876     m_clearSelectionIfItemsAreNotDragged = false;
1877     return false;
1878 }
1879
1880 void KItemListController::startRubberBand()
1881 {
1882     if (m_selectionBehavior == MultiSelection) {
1883         QPoint startPos = m_view->transform().map(m_view->scene()->views().first()->mapFromGlobal(m_pressedMouseGlobalPos.toPoint()));
1884         if (m_view->scrollOrientation() == Qt::Vertical) {
1885             startPos.ry() += m_view->scrollOffset();
1886         } else {
1887             startPos.rx() += m_view->scrollOffset();
1888         }
1889
1890         m_oldSelection = m_selectionManager->selectedItems();
1891         KItemListRubberBand *rubberBand = m_view->rubberBand();
1892         rubberBand->setStartPosition(startPos);
1893         rubberBand->setEndPosition(startPos);
1894         rubberBand->setActive(true);
1895         connect(rubberBand, &KItemListRubberBand::endPositionChanged, this, &KItemListController::slotRubberBandChanged);
1896         m_view->setAutoScroll(true);
1897     }
1898 }
1899
1900 void KItemListController::slotStateChanged(QScroller::State newState)
1901 {
1902     if (newState == QScroller::Scrolling) {
1903         m_scrollerIsScrolling = true;
1904     } else if (newState == QScroller::Inactive) {
1905         m_scrollerIsScrolling = false;
1906     }
1907 }
1908
1909 #include "moc_kitemlistcontroller.cpp"