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 "private/ktwofingerswipe.h"
  17 #include "private/ktwofingertap.h"
  18 #include "views/draganddrophelper.h"
  19
  20 #include <QAccessible>
  21 #include <QApplication>
  22 #include <QDrag>
  23 #include <QGesture>
  24 #include <QGraphicsScene>
  25 #include <QGraphicsSceneEvent>
  26 #include <QGraphicsView>
  27 #include <QMimeData>
  28 #include <QTimer>
  29 #include <QTouchEvent>
  30
  31 KItemListController::KItemListController(KItemModelBase* model, KItemListView* view, QObject* parent) :
  32     QObject(parent),
  33     m_singleClickActivationEnforced(false),
  34     m_selectionTogglePressed(false),
  35     m_clearSelectionIfItemsAreNotDragged(false),
  36     m_isSwipeGesture(false),
  37     m_dragActionOrRightClick(false),
  38     m_scrollerIsScrolling(false),
  39     m_pinchGestureInProgress(false),
  40     m_mousePress(false),
  41     m_isTouchEvent(false),
  42     m_selectionBehavior(NoSelection),
  43     m_autoActivationBehavior(ActivationAndExpansion),
  44     m_mouseDoubleClickAction(ActivateItemOnly),
  45     m_model(nullptr),
  46     m_view(nullptr),
  47     m_selectionManager(new KItemListSelectionManager(this)),
  48     m_keyboardManager(new KItemListKeyboardSearchManager(this)),
  49     m_pressedIndex(-1),
  50     m_pressedMousePos(),
  51     m_autoActivationTimer(nullptr),
  52     m_swipeGesture(Qt::CustomGesture),
  53     m_twoFingerTapGesture(Qt::CustomGesture),
  54     m_oldSelection(),
  55     m_keyboardAnchorIndex(-1),
  56     m_keyboardAnchorPos(0)
  57 {
  58     connect(m_keyboardManager, &KItemListKeyboardSearchManager::changeCurrentItem,
  59             this, &KItemListController::slotChangeCurrentItem);
  60     connect(m_selectionManager, &KItemListSelectionManager::currentChanged,
  61             m_keyboardManager, &KItemListKeyboardSearchManager::slotCurrentChanged);
  62     connect(m_selectionManager, &KItemListSelectionManager::selectionChanged,
  63             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     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     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     QHashIterator<KItemListWidget*, KItemListGroupHeader*> it(m_view->m_visibleGroups);
 190     while (it.hasNext()) {
 191         it.next();
 192         KItemListGroupHeader *groupHeader = it.value();
 193         const QPointF mappedToGroup = groupHeader->mapFromItem(nullptr, m_pressedMousePos);
 194         if (groupHeader->contains(mappedToGroup)) {
 195             return it.key()->index();
 196         }
 197     }
 198     return -1;
 199 }
 200
 201 void KItemListController::setAutoActivationDelay(int delay)
 202 {
 203     m_autoActivationTimer->setInterval(delay);
 204 }
 205
 206 int KItemListController::autoActivationDelay() const
 207 {
 208     return m_autoActivationTimer->interval();
 209 }
 210
 211 void KItemListController::setSingleClickActivationEnforced(bool singleClick)
 212 {
 213     m_singleClickActivationEnforced = singleClick;
 214 }
 215
 216 bool KItemListController::singleClickActivationEnforced() const
 217 {
 218     return m_singleClickActivationEnforced;
 219 }
 220
 221 bool KItemListController::keyPressEvent(QKeyEvent* event)
 222 {
 223     int index = m_selectionManager->currentItem();
 224     int key = event->key();
 225
 226     // Handle the expanding/collapsing of items
 227     if (m_view->supportsItemExpanding() && m_model->isExpandable(index)) {
 228         if (key == Qt::Key_Right) {
 229             if (m_model->setExpanded(index, true)) {
 230                 return true;
 231             }
 232         } else if (key == Qt::Key_Left) {
 233             if (m_model->setExpanded(index, false)) {
 234                 return true;
 235             }
 236         }
 237     }
 238
 239     const bool shiftPressed = event->modifiers() & Qt::ShiftModifier;
 240     const bool controlPressed = event->modifiers() & Qt::ControlModifier;
 241     const bool shiftOrControlPressed = shiftPressed || controlPressed;
 242     const bool navigationPressed = key == Qt::Key_Home || key == Qt::Key_End  ||
 243                                    key == Qt::Key_PageUp || key == Qt::Key_PageDown ||
 244                                    key == Qt::Key_Up || key == Qt::Key_Down ||
 245                                    key == Qt::Key_Left || key == Qt::Key_Right;
 246
 247     const int itemCount = m_model->count();
 248
 249     // For horizontal scroll orientation, transform
 250     // the arrow keys to simplify the event handling.
 251     if (m_view->scrollOrientation() == Qt::Horizontal) {
 252         switch (key) {
 253         case Qt::Key_Up:    key = Qt::Key_Left; break;
 254         case Qt::Key_Down:  key = Qt::Key_Right; break;
 255         case Qt::Key_Left:  key = Qt::Key_Up; break;
 256         case Qt::Key_Right: key = Qt::Key_Down; break;
 257         default:            break;
 258         }
 259     }
 260
 261     const bool selectSingleItem = m_selectionBehavior != NoSelection && itemCount == 1 && navigationPressed;
 262
 263     if (selectSingleItem) {
 264         const int current = m_selectionManager->currentItem();
 265         m_selectionManager->setSelected(current);
 266         return true;
 267     }
 268
 269     switch (key) {
 270     case Qt::Key_Home:
 271         index = 0;
 272         m_keyboardAnchorIndex = index;
 273         m_keyboardAnchorPos = keyboardAnchorPos(index);
 274         break;
 275
 276     case Qt::Key_End:
 277         index = itemCount - 1;
 278         m_keyboardAnchorIndex = index;
 279         m_keyboardAnchorPos = keyboardAnchorPos(index);
 280         break;
 281
 282     case Qt::Key_Left:
 283         if (index > 0) {
 284             const int expandedParentsCount = m_model->expandedParentsCount(index);
 285             if (expandedParentsCount == 0) {
 286                 --index;
 287             } else {
 288                 // Go to the parent of the current item.
 289                 do {
 290                     --index;
 291                 } while (index > 0 && m_model->expandedParentsCount(index) == expandedParentsCount);
 292             }
 293             m_keyboardAnchorIndex = index;
 294             m_keyboardAnchorPos = keyboardAnchorPos(index);
 295         }
 296         break;
 297
 298     case Qt::Key_Right:
 299         if (index < itemCount - 1) {
 300             ++index;
 301             m_keyboardAnchorIndex = index;
 302             m_keyboardAnchorPos = keyboardAnchorPos(index);
 303         }
 304         break;
 305
 306     case Qt::Key_Up:
 307         updateKeyboardAnchor();
 308         index = previousRowIndex(index);
 309         break;
 310
 311     case Qt::Key_Down:
 312         updateKeyboardAnchor();
 313         index = nextRowIndex(index);
 314         break;
 315
 316     case Qt::Key_PageUp:
 317         if (m_view->scrollOrientation() == Qt::Horizontal) {
 318             // The new current index should correspond to the first item in the current column.
 319             int newIndex = qMax(index - 1, 0);
 320             while (newIndex != index && m_view->itemRect(newIndex).topLeft().y() < m_view->itemRect(index).topLeft().y()) {
 321                 index = newIndex;
 322                 newIndex = qMax(index - 1, 0);
 323             }
 324             m_keyboardAnchorIndex = index;
 325             m_keyboardAnchorPos = keyboardAnchorPos(index);
 326         } else {
 327             const qreal currentItemBottom = m_view->itemRect(index).bottomLeft().y();
 328             const qreal height = m_view->geometry().height();
 329
 330             // The new current item should be the first item in the current
 331             // column whose itemRect's top coordinate is larger than targetY.
 332             const qreal targetY = currentItemBottom - height;
 333
 334             updateKeyboardAnchor();
 335             int newIndex = previousRowIndex(index);
 336             do {
 337                 index = newIndex;
 338                 updateKeyboardAnchor();
 339                 newIndex = previousRowIndex(index);
 340             } while (m_view->itemRect(newIndex).topLeft().y() > targetY && newIndex != index);
 341         }
 342         break;
 343
 344     case Qt::Key_PageDown:
 345         if (m_view->scrollOrientation() == Qt::Horizontal) {
 346             // The new current index should correspond to the last item in the current column.
 347             int newIndex = qMin(index + 1, m_model->count() - 1);
 348             while (newIndex != index && m_view->itemRect(newIndex).topLeft().y() > m_view->itemRect(index).topLeft().y()) {
 349                 index = newIndex;
 350                 newIndex = qMin(index + 1, m_model->count() - 1);
 351             }
 352             m_keyboardAnchorIndex = index;
 353             m_keyboardAnchorPos = keyboardAnchorPos(index);
 354         } else {
 355             const qreal currentItemTop = m_view->itemRect(index).topLeft().y();
 356             const qreal height = m_view->geometry().height();
 357
 358             // The new current item should be the last item in the current
 359             // column whose itemRect's bottom coordinate is smaller than targetY.
 360             const qreal targetY = currentItemTop + height;
 361
 362             updateKeyboardAnchor();
 363             int newIndex = nextRowIndex(index);
 364             do {
 365                 index = newIndex;
 366                 updateKeyboardAnchor();
 367                 newIndex = nextRowIndex(index);
 368             } while (m_view->itemRect(newIndex).bottomLeft().y() < targetY && newIndex != index);
 369         }
 370         break;
 371
 372     case Qt::Key_Enter:
 373     case Qt::Key_Return: {
 374         const KItemSet selectedItems = m_selectionManager->selectedItems();
 375         if (selectedItems.count() >= 2) {
 376             emit itemsActivated(selectedItems);
 377         } else if (selectedItems.count() == 1) {
 378             emit itemActivated(selectedItems.first());
 379         } else {
 380             emit itemActivated(index);
 381         }
 382         break;
 383     }
 384
 385     case Qt::Key_Menu: {
 386         // Emit the signal itemContextMenuRequested() in case if at least one
 387         // item is selected. Otherwise the signal viewContextMenuRequested() will be emitted.
 388         const KItemSet selectedItems = m_selectionManager->selectedItems();
 389         int index = -1;
 390         if (selectedItems.count() >= 2) {
 391             const int currentItemIndex = m_selectionManager->currentItem();
 392             index = selectedItems.contains(currentItemIndex)
 393                     ? currentItemIndex : selectedItems.first();
 394         } else if (selectedItems.count() == 1) {
 395             index = selectedItems.first();
 396         }
 397
 398         if (index >= 0) {
 399             const QRectF contextRect = m_view->itemContextRect(index);
 400             const QPointF pos(m_view->scene()->views().first()->mapToGlobal(contextRect.bottomRight().toPoint()));
 401             emit itemContextMenuRequested(index, pos);
 402         } else {
 403             emit viewContextMenuRequested(QCursor::pos());
 404         }
 405         break;
 406     }
 407
 408     case Qt::Key_Escape:
 409         if (m_selectionBehavior != SingleSelection) {
 410             m_selectionManager->clearSelection();
 411         }
 412         m_keyboardManager->cancelSearch();
 413         emit escapePressed();
 414         break;
 415
 416     case Qt::Key_Space:
 417         if (m_selectionBehavior == MultiSelection) {
 418             if (controlPressed) {
 419                 // Toggle the selection state of the current item.
 420                 m_selectionManager->endAnchoredSelection();
 421                 m_selectionManager->setSelected(index, 1, KItemListSelectionManager::Toggle);
 422                 m_selectionManager->beginAnchoredSelection(index);
 423                 break;
 424             } else {
 425                 // Select the current item if it is not selected yet.
 426                 const int current = m_selectionManager->currentItem();
 427                 if (!m_selectionManager->isSelected(current)) {
 428                     m_selectionManager->setSelected(current);
 429                     break;
 430                 }
 431             }
 432         }
 433         Q_FALLTHROUGH();  // fall through to the default case and add the Space to the current search string.
 434     default:
 435         m_keyboardManager->addKeys(event->text());
 436         // Make sure unconsumed events get propagated up the chain. #302329
 437         event->ignore();
 438         return false;
 439     }
 440
 441     if (m_selectionManager->currentItem() != index) {
 442         switch (m_selectionBehavior) {
 443         case NoSelection:
 444             m_selectionManager->setCurrentItem(index);
 445             break;
 446
 447         case SingleSelection:
 448             m_selectionManager->setCurrentItem(index);
 449             m_selectionManager->clearSelection();
 450             m_selectionManager->setSelected(index, 1);
 451             break;
 452
 453         case MultiSelection:
 454             if (controlPressed) {
 455                 m_selectionManager->endAnchoredSelection();
 456             }
 457
 458             m_selectionManager->setCurrentItem(index);
 459
 460             if (!shiftOrControlPressed) {
 461                 m_selectionManager->clearSelection();
 462                 m_selectionManager->setSelected(index, 1);
 463             }
 464
 465             if (!shiftPressed) {
 466                 m_selectionManager->beginAnchoredSelection(index);
 467             }
 468             break;
 469         }
 470     }
 471
 472     if (navigationPressed) {
 473         m_view->scrollToItem(index);
 474     }
 475     return true;
 476 }
 477
 478 void KItemListController::slotChangeCurrentItem(const QString& text, bool searchFromNextItem)
 479 {
 480     if (!m_model || m_model->count() == 0) {
 481         return;
 482     }
 483     int index;
 484     if (searchFromNextItem) {
 485         const int currentIndex = m_selectionManager->currentItem();
 486         index = m_model->indexForKeyboardSearch(text, (currentIndex + 1) % m_model->count());
 487     } else {
 488         index = m_model->indexForKeyboardSearch(text, 0);
 489     }
 490     if (index >= 0) {
 491         m_selectionManager->setCurrentItem(index);
 492
 493         if (m_selectionBehavior != NoSelection) {
 494             m_selectionManager->replaceSelection(index);
 495             m_selectionManager->beginAnchoredSelection(index);
 496         }
 497
 498         m_view->scrollToItem(index);
 499     }
 500 }
 501
 502 void KItemListController::slotAutoActivationTimeout()
 503 {
 504     if (!m_model || !m_view) {
 505         return;
 506     }
 507
 508     const int index = m_autoActivationTimer->property("index").toInt();
 509     if (index < 0 || index >= m_model->count()) {
 510         return;
 511     }
 512
 513     /* m_view->isUnderMouse() fixes a bug in the Folder-View-Panel and in the
 514      * Places-Panel.
 515      *
 516      * Bug: When you drag a file onto a Folder-View-Item or a Places-Item and
 517      * then move away before the auto-activation timeout triggers, than the
 518      * item still becomes activated/expanded.
 519      *
 520      * See Bug 293200 and 305783
 521      */
 522     if (m_model->supportsDropping(index) && m_view->isUnderMouse()) {
 523         if (m_view->supportsItemExpanding() && m_model->isExpandable(index)) {
 524             const bool expanded = m_model->isExpanded(index);
 525             m_model->setExpanded(index, !expanded);
 526         } else if (m_autoActivationBehavior != ExpansionOnly) {
 527             emit itemActivated(index);
 528         }
 529     }
 530 }
 531
 532 bool KItemListController::inputMethodEvent(QInputMethodEvent* event)
 533 {
 534     Q_UNUSED(event)
 535     return false;
 536 }
 537
 538 bool KItemListController::mousePressEvent(QGraphicsSceneMouseEvent* event, const QTransform& transform)
 539 {
 540     m_mousePress = true;
 541
 542     if (event->source() == Qt::MouseEventSynthesizedByQt && m_isTouchEvent) {
 543         return false;
 544     }
 545
 546     if (!m_view) {
 547         return false;
 548     }
 549
 550     m_pressedMousePos = transform.map(event->pos());
 551     m_pressedIndex = m_view->itemAt(m_pressedMousePos);
 552
 553     const Qt::MouseButtons buttons = event->buttons();
 554
 555     if (!onPress(event->screenPos(), event->pos(), event->modifiers(), buttons)) {
 556         startRubberBand();
 557         return false;
 558     }
 559
 560     return true;
 561 }
 562
 563 bool KItemListController::mouseMoveEvent(QGraphicsSceneMouseEvent* event, const QTransform& transform)
 564 {
 565     if (!m_view) {
 566         return false;
 567     }
 568
 569     if (m_view->m_tapAndHoldIndicator->isActive()) {
 570         m_view->m_tapAndHoldIndicator->setActive(false);
 571     }
 572
 573     if (event->source() == Qt::MouseEventSynthesizedByQt && !m_dragActionOrRightClick && m_isTouchEvent) {
 574         return false;
 575     }
 576
 577     if (m_pressedIndex >= 0) {
 578         // Check whether a dragging should be started
 579         if (event->buttons() & Qt::LeftButton) {
 580             const QPointF pos = transform.map(event->pos());
 581             if ((pos - m_pressedMousePos).manhattanLength() >= QApplication::startDragDistance()) {
 582                 if (!m_selectionManager->isSelected(m_pressedIndex)) {
 583                     // Always assure that the dragged item gets selected. Usually this is already
 584                     // done on the mouse-press event, but when using the selection-toggle on a
 585                     // selected item the dragged item is not selected yet.
 586                     m_selectionManager->setSelected(m_pressedIndex, 1, KItemListSelectionManager::Toggle);
 587                 } else {
 588                     // A selected item has been clicked to drag all selected items
 589                     // -> the selection should not be cleared when the mouse button is released.
 590                     m_clearSelectionIfItemsAreNotDragged = false;
 591                 }
 592                 startDragging();
 593                 m_mousePress = false;
 594             }
 595         }
 596     } else {
 597         KItemListRubberBand* rubberBand = m_view->rubberBand();
 598         if (rubberBand->isActive()) {
 599             QPointF endPos = transform.map(event->pos());
 600
 601             // Update the current item.
 602             const int newCurrent = m_view->itemAt(endPos);
 603             if (newCurrent >= 0) {
 604                 // It's expected that the new current index is also the new anchor (bug 163451).
 605                 m_selectionManager->endAnchoredSelection();
 606                 m_selectionManager->setCurrentItem(newCurrent);
 607                 m_selectionManager->beginAnchoredSelection(newCurrent);
 608             }
 609
 610             if (m_view->scrollOrientation() == Qt::Vertical) {
 611                 endPos.ry() += m_view->scrollOffset();
 612                 if (m_view->itemSize().width() < 0) {
 613                     // Use a special rubberband for views that have only one column and
 614                     // expand the rubberband to use the whole width of the view.
 615                     endPos.setX(m_view->size().width());
 616                 }
 617             } else {
 618                 endPos.rx() += m_view->scrollOffset();
 619             }
 620             rubberBand->setEndPosition(endPos);
 621         }
 622     }
 623
 624     return false;
 625 }
 626
 627 bool KItemListController::mouseReleaseEvent(QGraphicsSceneMouseEvent* event, const QTransform& transform)
 628 {
 629     m_mousePress = false;
 630     m_isTouchEvent = false;
 631
 632     if (!m_view) {
 633         return false;
 634     }
 635
 636     if (m_view->m_tapAndHoldIndicator->isActive()) {
 637         m_view->m_tapAndHoldIndicator->setActive(false);
 638     }
 639
 640     KItemListRubberBand* rubberBand = m_view->rubberBand();
 641     if (event->source() == Qt::MouseEventSynthesizedByQt && !rubberBand->isActive() && m_isTouchEvent) {
 642         return false;
 643     }
 644
 645     emit mouseButtonReleased(m_pressedIndex, event->buttons());
 646
 647     return onRelease(transform.map(event->pos()), event->modifiers(), event->button(), false);
 648 }
 649
 650 bool KItemListController::mouseDoubleClickEvent(QGraphicsSceneMouseEvent* event, const QTransform& transform)
 651 {
 652     const QPointF pos = transform.map(event->pos());
 653     const int index = m_view->itemAt(pos);
 654
 655     // Expand item if desired - See Bug 295573
 656     if (m_mouseDoubleClickAction != ActivateItemOnly) {
 657         if (m_view && m_model && m_view->supportsItemExpanding() && m_model->isExpandable(index)) {
 658             const bool expanded = m_model->isExpanded(index);
 659             m_model->setExpanded(index, !expanded);
 660         }
 661     }
 662
 663     if (event->button() & Qt::RightButton) {
 664         m_selectionManager->clearSelection();
 665         if (index >= 0) {
 666             m_selectionManager->setSelected(index);
 667             emit itemContextMenuRequested(index, event->screenPos());
 668         } else {
 669             const QRectF headerBounds = m_view->headerBoundaries();
 670             if (headerBounds.contains(event->pos())) {
 671                 emit headerContextMenuRequested(event->screenPos());
 672             } else {
 673                 emit viewContextMenuRequested(event->screenPos());
 674             }
 675         }
 676         return true;
 677     }
 678
 679     bool emitItemActivated = !(m_view->style()->styleHint(QStyle::SH_ItemView_ActivateItemOnSingleClick) || m_singleClickActivationEnforced) &&
 680                              (event->button() & Qt::LeftButton) &&
 681                              index >= 0 && index < m_model->count();
 682     if (emitItemActivated) {
 683         emit itemActivated(index);
 684     }
 685     return false;
 686 }
 687
 688 bool KItemListController::dragEnterEvent(QGraphicsSceneDragDropEvent* event, const QTransform& transform)
 689 {
 690     Q_UNUSED(event)
 691     Q_UNUSED(transform)
 692
 693     DragAndDropHelper::clearUrlListMatchesUrlCache();
 694
 695     return false;
 696 }
 697
 698 bool KItemListController::dragLeaveEvent(QGraphicsSceneDragDropEvent* event, const QTransform& transform)
 699 {
 700     Q_UNUSED(event)
 701     Q_UNUSED(transform)
 702
 703     m_autoActivationTimer->stop();
 704     m_view->setAutoScroll(false);
 705     m_view->hideDropIndicator();
 706
 707     KItemListWidget* widget = hoveredWidget();
 708     if (widget) {
 709         widget->setHovered(false);
 710         emit itemUnhovered(widget->index());
 711     }
 712     return false;
 713 }
 714
 715 bool KItemListController::dragMoveEvent(QGraphicsSceneDragDropEvent* event, const QTransform& transform)
 716 {
 717     if (!m_model || !m_view) {
 718         return false;
 719     }
 720
 721
 722     QUrl hoveredDir = m_model->directory();
 723     KItemListWidget* oldHoveredWidget = hoveredWidget();
 724
 725     const QPointF pos = transform.map(event->pos());
 726     KItemListWidget* newHoveredWidget = widgetForPos(pos);
 727
 728     if (oldHoveredWidget != newHoveredWidget) {
 729         m_autoActivationTimer->stop();
 730
 731         if (oldHoveredWidget) {
 732             oldHoveredWidget->setHovered(false);
 733             emit itemUnhovered(oldHoveredWidget->index());
 734         }
 735     }
 736
 737     if (newHoveredWidget) {
 738         bool droppingBetweenItems = false;
 739         if (m_model->sortRole().isEmpty()) {
 740             // The model supports inserting items between other items.
 741             droppingBetweenItems = (m_view->showDropIndicator(pos) >= 0);
 742         }
 743
 744         const int index = newHoveredWidget->index();
 745
 746         if (m_model->isDir(index)) {
 747             hoveredDir = m_model->url(index);
 748         }
 749
 750         if (!droppingBetweenItems) {
 751             if (m_model->supportsDropping(index)) {
 752                 // Something has been dragged on an item.
 753                 m_view->hideDropIndicator();
 754                 if (!newHoveredWidget->isHovered()) {
 755                     newHoveredWidget->setHovered(true);
 756                     emit itemHovered(index);
 757                 }
 758
 759                 if (!m_autoActivationTimer->isActive() && m_autoActivationTimer->interval() >= 0) {
 760                     m_autoActivationTimer->setProperty("index", index);
 761                     m_autoActivationTimer->start();
 762                 }
 763             }
 764         } else {
 765             m_autoActivationTimer->stop();
 766             if (newHoveredWidget && newHoveredWidget->isHovered()) {
 767                 newHoveredWidget->setHovered(false);
 768                 emit itemUnhovered(index);
 769             }
 770         }
 771     } else {
 772         m_view->hideDropIndicator();
 773     }
 774
 775     if (DragAndDropHelper::urlListMatchesUrl(event->mimeData()->urls(), hoveredDir)) {
 776         event->setDropAction(Qt::IgnoreAction);
 777         event->ignore();
 778     } else {
 779         event->setDropAction(event->proposedAction());
 780         event->accept();
 781     }
 782     return false;
 783 }
 784
 785 bool KItemListController::dropEvent(QGraphicsSceneDragDropEvent* event, const QTransform& transform)
 786 {
 787     if (!m_view) {
 788         return false;
 789     }
 790
 791     m_autoActivationTimer->stop();
 792     m_view->setAutoScroll(false);
 793
 794     const QPointF pos = transform.map(event->pos());
 795
 796     int dropAboveIndex = -1;
 797     if (m_model->sortRole().isEmpty()) {
 798         // The model supports inserting of items between other items.
 799         dropAboveIndex = m_view->showDropIndicator(pos);
 800     }
 801
 802     if (dropAboveIndex >= 0) {
 803         // Something has been dropped between two items.
 804         m_view->hideDropIndicator();
 805         emit aboveItemDropEvent(dropAboveIndex, event);
 806     } else if (!event->mimeData()->hasFormat(m_model->blacklistItemDropEventMimeType())) {
 807         // Something has been dropped on an item or on an empty part of the view.
 808         emit itemDropEvent(m_view->itemAt(pos), event);
 809     }
 810
 811     QAccessibleEvent accessibilityEvent(view(), QAccessible::DragDropEnd);
 812     QAccessible::updateAccessibility(&accessibilityEvent);
 813
 814     return true;
 815 }
 816
 817 bool KItemListController::hoverEnterEvent(QGraphicsSceneHoverEvent* event, const QTransform& transform)
 818 {
 819     Q_UNUSED(event)
 820     Q_UNUSED(transform)
 821     return false;
 822 }
 823
 824 bool KItemListController::hoverMoveEvent(QGraphicsSceneHoverEvent* event, const QTransform& transform)
 825 {
 826     Q_UNUSED(transform)
 827     if (!m_model || !m_view) {
 828         return false;
 829     }
 830
 831     KItemListWidget* oldHoveredWidget = hoveredWidget();
 832     const QPointF pos = transform.map(event->pos());
 833     KItemListWidget* newHoveredWidget = widgetForPos(pos);
 834
 835     if (oldHoveredWidget != newHoveredWidget) {
 836         if (oldHoveredWidget) {
 837             oldHoveredWidget->setHovered(false);
 838             emit itemUnhovered(oldHoveredWidget->index());
 839         }
 840
 841         if (newHoveredWidget) {
 842             newHoveredWidget->setHovered(true);
 843             const QPointF mappedPos = newHoveredWidget->mapFromItem(m_view, pos);
 844             newHoveredWidget->setHoverPosition(mappedPos);
 845             emit itemHovered(newHoveredWidget->index());
 846         }
 847     } else if (oldHoveredWidget) {
 848         const QPointF mappedPos = oldHoveredWidget->mapFromItem(m_view, pos);
 849         oldHoveredWidget->setHoverPosition(mappedPos);
 850     }
 851
 852     return false;
 853 }
 854
 855 bool KItemListController::hoverLeaveEvent(QGraphicsSceneHoverEvent* event, const QTransform& transform)
 856 {
 857     Q_UNUSED(event)
 858     Q_UNUSED(transform)
 859
 860     m_mousePress = false;
 861     m_isTouchEvent = false;
 862
 863     if (!m_model || !m_view) {
 864         return false;
 865     }
 866
 867     foreach (KItemListWidget* widget, m_view->visibleItemListWidgets()) {
 868         if (widget->isHovered()) {
 869             widget->setHovered(false);
 870             emit itemUnhovered(widget->index());
 871         }
 872     }
 873     return false;
 874 }
 875
 876 bool KItemListController::wheelEvent(QGraphicsSceneWheelEvent* event, const QTransform& transform)
 877 {
 878     Q_UNUSED(event)
 879     Q_UNUSED(transform)
 880     return false;
 881 }
 882
 883 bool KItemListController::resizeEvent(QGraphicsSceneResizeEvent* event, const QTransform& transform)
 884 {
 885     Q_UNUSED(event)
 886     Q_UNUSED(transform)
 887     return false;
 888 }
 889
 890 bool KItemListController::gestureEvent(QGestureEvent* event, const QTransform& transform)
 891 {
 892     if (!m_view) {
 893         return false;
 894     }
 895
 896     //you can touch on different views at the same time, but only one QWidget gets a mousePressEvent
 897     //we use this to get the right QWidget
 898     //the only exception is a tap gesture with state GestureStarted, we need to reset some variable
 899     if (!m_mousePress) {
 900         if (QGesture* tap = event->gesture(Qt::TapGesture)) {
 901             QTapGesture* tapGesture = static_cast<QTapGesture*>(tap);
 902             if (tapGesture->state() == Qt::GestureStarted) {
 903                 tapTriggered(tapGesture, transform);
 904             }
 905         }
 906         return false;
 907     }
 908
 909     bool accepted = false;
 910
 911     if (QGesture* tap = event->gesture(Qt::TapGesture)) {
 912         tapTriggered(static_cast<QTapGesture*>(tap), transform);
 913         accepted = true;
 914     }
 915     if (event->gesture(Qt::TapAndHoldGesture)) {
 916         tapAndHoldTriggered(event, transform);
 917         accepted = true;
 918     }
 919     if (event->gesture(Qt::PinchGesture)) {
 920         pinchTriggered(event, transform);
 921         accepted = true;
 922     }
 923     if (event->gesture(m_swipeGesture)) {
 924         swipeTriggered(event, transform);
 925         accepted = true;
 926     }
 927     if (event->gesture(m_twoFingerTapGesture)) {
 928         twoFingerTapTriggered(event, transform);
 929         accepted = true;
 930     }
 931     return accepted;
 932 }
 933
 934 bool KItemListController::touchBeginEvent(QTouchEvent* event, const QTransform& transform)
 935 {
 936     Q_UNUSED(event)
 937     Q_UNUSED(transform)
 938
 939     m_isTouchEvent = true;
 940     return false;
 941 }
 942
 943 void KItemListController::tapTriggered(QTapGesture* tap, const QTransform& transform)
 944 {
 945     static bool scrollerWasActive = false;
 946
 947     if (tap->state() == Qt::GestureStarted) {
 948         m_dragActionOrRightClick = false;
 949         m_isSwipeGesture = false;
 950         m_pinchGestureInProgress = false;
 951         scrollerWasActive = m_scrollerIsScrolling;
 952     }
 953
 954     if (tap->state() == Qt::GestureFinished) {
 955         m_mousePress = false;
 956
 957         //if at the moment of the gesture start the QScroller was active, the user made the tap
 958         //to stop the QScroller and not to tap on an item
 959         if (scrollerWasActive) {
 960             return;
 961         }
 962
 963         if (m_view->m_tapAndHoldIndicator->isActive()) {
 964             m_view->m_tapAndHoldIndicator->setActive(false);
 965         }
 966
 967         m_pressedMousePos = transform.map(tap->position());
 968         m_pressedIndex = m_view->itemAt(m_pressedMousePos);
 969
 970         if (m_dragActionOrRightClick) {
 971             onPress(tap->hotSpot().toPoint(), tap->position().toPoint(), Qt::NoModifier, Qt::RightButton);
 972             onRelease(transform.map(tap->position()), Qt::NoModifier, Qt::RightButton, false);
 973             m_dragActionOrRightClick = false;
 974         }
 975         else {
 976             onPress(tap->hotSpot().toPoint(), tap->position().toPoint(), Qt::NoModifier, Qt::LeftButton);
 977             onRelease(transform.map(tap->position()), Qt::NoModifier, Qt::LeftButton, true);
 978         }
 979         m_isTouchEvent = false;
 980     }
 981 }
 982
 983 void KItemListController::tapAndHoldTriggered(QGestureEvent* event, const QTransform& transform)
 984 {
 985
 986     //the Qt TabAndHold gesture is triggerable with a mouse click, we don't want this
 987     if (!m_isTouchEvent) {
 988         return;
 989     }
 990
 991     const QTapAndHoldGesture* tap = static_cast<QTapAndHoldGesture*>(event->gesture(Qt::TapAndHoldGesture));
 992     if (tap->state() == Qt::GestureFinished) {
 993         //if a pinch gesture is in progress we don't want a TabAndHold gesture
 994         if (m_pinchGestureInProgress) {
 995             return;
 996         }
 997         m_pressedMousePos = transform.map(event->mapToGraphicsScene(tap->position()));
 998         m_pressedIndex = m_view->itemAt(m_pressedMousePos);
 999
1000         if (m_pressedIndex >= 0 && !m_selectionManager->isSelected(m_pressedIndex)) {
1001             m_selectionManager->clearSelection();
1002             m_selectionManager->setSelected(m_pressedIndex);
1003         } else if (m_pressedIndex == -1) {
1004             m_selectionManager->clearSelection();
1005             startRubberBand();
1006         }
1007
1008         emit scrollerStop();
1009
1010         m_view->m_tapAndHoldIndicator->setStartPosition(m_pressedMousePos);
1011         m_view->m_tapAndHoldIndicator->setActive(true);
1012
1013         m_dragActionOrRightClick = true;
1014     }
1015 }
1016
1017 void KItemListController::pinchTriggered(QGestureEvent* event, const QTransform& transform)
1018 {
1019     Q_UNUSED(transform)
1020
1021     const QPinchGesture* pinch = static_cast<QPinchGesture*>(event->gesture(Qt::PinchGesture));
1022     const qreal sensitivityModifier = 0.2;
1023     static qreal counter = 0;
1024
1025     if (pinch->state() == Qt::GestureStarted) {
1026         m_pinchGestureInProgress = true;
1027         counter = 0;
1028     }
1029     if (pinch->state() == Qt::GestureUpdated) {
1030         //if a swipe gesture was recognized or in progress, we don't want a pinch gesture to change the zoom
1031         if (m_isSwipeGesture) {
1032             return;
1033         }
1034         counter = counter + (pinch->scaleFactor() - 1);
1035         if (counter >= sensitivityModifier) {
1036             emit increaseZoom();
1037             counter = 0;
1038         } else if (counter <= -sensitivityModifier) {
1039             emit decreaseZoom();
1040             counter = 0;
1041         }
1042     }
1043 }
1044
1045 void KItemListController::swipeTriggered(QGestureEvent* event, const QTransform& transform)
1046 {
1047     Q_UNUSED(transform)
1048
1049     const KTwoFingerSwipe* swipe = static_cast<KTwoFingerSwipe*>(event->gesture(m_swipeGesture));
1050
1051     if (!swipe) {
1052         return;
1053     }
1054     if (swipe->state() == Qt::GestureStarted) {
1055         m_isSwipeGesture = true;
1056     }
1057
1058     if (swipe->state() == Qt::GestureCanceled) {
1059         m_isSwipeGesture = false;
1060     }
1061
1062     if (swipe->state() == Qt::GestureFinished) {
1063         emit scrollerStop();
1064
1065         if (swipe->swipeAngle() <= 20 || swipe->swipeAngle() >= 340) {
1066             emit mouseButtonPressed(m_pressedIndex, Qt::BackButton);
1067         } else if (swipe->swipeAngle() <= 200 && swipe->swipeAngle() >= 160) {
1068             emit mouseButtonPressed(m_pressedIndex, Qt::ForwardButton);
1069         } else if (swipe->swipeAngle() <= 110 && swipe->swipeAngle() >= 60) {
1070             emit swipeUp();
1071         }
1072         m_isSwipeGesture = true;
1073     }
1074 }
1075
1076 void KItemListController::twoFingerTapTriggered(QGestureEvent* event, const QTransform& transform)
1077 {
1078     const KTwoFingerTap* twoTap = static_cast<KTwoFingerTap*>(event->gesture(m_twoFingerTapGesture));
1079
1080     if (!twoTap) {
1081         return;
1082     }
1083
1084     if (twoTap->state() == Qt::GestureStarted) {
1085         m_pressedMousePos = transform.map(twoTap->pos());
1086         m_pressedIndex = m_view->itemAt(m_pressedMousePos);
1087         if (m_pressedIndex >= 0) {
1088             onPress(twoTap->screenPos().toPoint(), twoTap->pos().toPoint(), Qt::ControlModifier, Qt::LeftButton);
1089             onRelease(transform.map(twoTap->pos()), Qt::ControlModifier, Qt::LeftButton, false);
1090         }
1091
1092     }
1093 }
1094
1095 bool KItemListController::processEvent(QEvent* event, const QTransform& transform)
1096 {
1097     if (!event) {
1098         return false;
1099     }
1100
1101     switch (event->type()) {
1102     case QEvent::KeyPress:
1103         return keyPressEvent(static_cast<QKeyEvent*>(event));
1104     case QEvent::InputMethod:
1105         return inputMethodEvent(static_cast<QInputMethodEvent*>(event));
1106     case QEvent::GraphicsSceneMousePress:
1107         return mousePressEvent(static_cast<QGraphicsSceneMouseEvent*>(event), QTransform());
1108     case QEvent::GraphicsSceneMouseMove:
1109         return mouseMoveEvent(static_cast<QGraphicsSceneMouseEvent*>(event), QTransform());
1110     case QEvent::GraphicsSceneMouseRelease:
1111         return mouseReleaseEvent(static_cast<QGraphicsSceneMouseEvent*>(event), QTransform());
1112     case QEvent::GraphicsSceneMouseDoubleClick:
1113         return mouseDoubleClickEvent(static_cast<QGraphicsSceneMouseEvent*>(event), QTransform());
1114     case QEvent::GraphicsSceneWheel:
1115          return wheelEvent(static_cast<QGraphicsSceneWheelEvent*>(event), QTransform());
1116     case QEvent::GraphicsSceneDragEnter:
1117         return dragEnterEvent(static_cast<QGraphicsSceneDragDropEvent*>(event), QTransform());
1118     case QEvent::GraphicsSceneDragLeave:
1119         return dragLeaveEvent(static_cast<QGraphicsSceneDragDropEvent*>(event), QTransform());
1120     case QEvent::GraphicsSceneDragMove:
1121         return dragMoveEvent(static_cast<QGraphicsSceneDragDropEvent*>(event), QTransform());
1122     case QEvent::GraphicsSceneDrop:
1123         return dropEvent(static_cast<QGraphicsSceneDragDropEvent*>(event), QTransform());
1124     case QEvent::GraphicsSceneHoverEnter:
1125         return hoverEnterEvent(static_cast<QGraphicsSceneHoverEvent*>(event), QTransform());
1126     case QEvent::GraphicsSceneHoverMove:
1127         return hoverMoveEvent(static_cast<QGraphicsSceneHoverEvent*>(event), QTransform());
1128     case QEvent::GraphicsSceneHoverLeave:
1129         return hoverLeaveEvent(static_cast<QGraphicsSceneHoverEvent*>(event), QTransform());
1130     case QEvent::GraphicsSceneResize:
1131         return resizeEvent(static_cast<QGraphicsSceneResizeEvent*>(event), transform);
1132     case QEvent::Gesture:
1133         return gestureEvent(static_cast<QGestureEvent*>(event), transform);
1134     case QEvent::TouchBegin:
1135         return touchBeginEvent(static_cast<QTouchEvent*>(event), transform);
1136     default:
1137         break;
1138     }
1139
1140     return false;
1141 }
1142
1143 void KItemListController::slotViewScrollOffsetChanged(qreal current, qreal previous)
1144 {
1145     if (!m_view) {
1146         return;
1147     }
1148
1149     KItemListRubberBand* rubberBand = m_view->rubberBand();
1150     if (rubberBand->isActive()) {
1151         const qreal diff = current - previous;
1152         // TODO: Ideally just QCursor::pos() should be used as
1153         // new end-position but it seems there is no easy way
1154         // to have something like QWidget::mapFromGlobal() for QGraphicsWidget
1155         // (... or I just missed an easy way to do the mapping)
1156         QPointF endPos = rubberBand->endPosition();
1157         if (m_view->scrollOrientation() == Qt::Vertical) {
1158             endPos.ry() += diff;
1159         } else {
1160             endPos.rx() += diff;
1161         }
1162
1163         rubberBand->setEndPosition(endPos);
1164     }
1165 }
1166
1167 void KItemListController::slotRubberBandChanged()
1168 {
1169     if (!m_view || !m_model || m_model->count() <= 0) {
1170         return;
1171     }
1172
1173     const KItemListRubberBand* rubberBand = m_view->rubberBand();
1174     const QPointF startPos = rubberBand->startPosition();
1175     const QPointF endPos = rubberBand->endPosition();
1176     QRectF rubberBandRect = QRectF(startPos, endPos).normalized();
1177
1178     const bool scrollVertical = (m_view->scrollOrientation() == Qt::Vertical);
1179     if (scrollVertical) {
1180         rubberBandRect.translate(0, -m_view->scrollOffset());
1181     } else {
1182         rubberBandRect.translate(-m_view->scrollOffset(), 0);
1183     }
1184
1185     if (!m_oldSelection.isEmpty()) {
1186         // Clear the old selection that was available before the rubberband has
1187         // been activated in case if no Shift- or Control-key are pressed
1188         const bool shiftOrControlPressed = QApplication::keyboardModifiers() & Qt::ShiftModifier ||
1189                                            QApplication::keyboardModifiers() & Qt::ControlModifier;
1190         if (!shiftOrControlPressed) {
1191             m_oldSelection.clear();
1192         }
1193     }
1194
1195     KItemSet selectedItems;
1196
1197     // Select all visible items that intersect with the rubberband
1198     foreach (const KItemListWidget* widget, m_view->visibleItemListWidgets()) {
1199         const int index = widget->index();
1200
1201         const QRectF widgetRect = m_view->itemRect(index);
1202         if (widgetRect.intersects(rubberBandRect)) {
1203             const QRectF iconRect = widget->iconRect().translated(widgetRect.topLeft());
1204             const QRectF textRect = widget->textRect().translated(widgetRect.topLeft());
1205             if (iconRect.intersects(rubberBandRect) || textRect.intersects(rubberBandRect)) {
1206                 selectedItems.insert(index);
1207             }
1208         }
1209     }
1210
1211     // Select all invisible items that intersect with the rubberband. Instead of
1212     // iterating all items only the area which might be touched by the rubberband
1213     // will be checked.
1214     const bool increaseIndex = scrollVertical ?
1215                                startPos.y() > endPos.y(): startPos.x() > endPos.x();
1216
1217     int index = increaseIndex ? m_view->lastVisibleIndex() + 1 : m_view->firstVisibleIndex() - 1;
1218     bool selectionFinished = false;
1219     do {
1220         const QRectF widgetRect = m_view->itemRect(index);
1221         if (widgetRect.intersects(rubberBandRect)) {
1222             selectedItems.insert(index);
1223         }
1224
1225         if (increaseIndex) {
1226             ++index;
1227             selectionFinished = (index >= m_model->count()) ||
1228                                 ( scrollVertical && widgetRect.top()  > rubberBandRect.bottom()) ||
1229                                 (!scrollVertical && widgetRect.left() > rubberBandRect.right());
1230         } else {
1231             --index;
1232             selectionFinished = (index < 0) ||
1233                                 ( scrollVertical && widgetRect.bottom() < rubberBandRect.top()) ||
1234                                 (!scrollVertical && widgetRect.right()  < rubberBandRect.left());
1235         }
1236     } while (!selectionFinished);
1237
1238     if (QApplication::keyboardModifiers() & Qt::ControlModifier) {
1239         // If Control is pressed, the selection state of all items in the rubberband is toggled.
1240         // Therefore, the new selection contains:
1241         // 1. All previously selected items which are not inside the rubberband, and
1242         // 2. all items inside the rubberband which have not been selected previously.
1243         m_selectionManager->setSelectedItems(m_oldSelection ^ selectedItems);
1244     }
1245     else {
1246         m_selectionManager->setSelectedItems(selectedItems + m_oldSelection);
1247     }
1248 }
1249
1250 void KItemListController::startDragging()
1251 {
1252     if (!m_view || !m_model) {
1253         return;
1254     }
1255
1256     const KItemSet selectedItems = m_selectionManager->selectedItems();
1257     if (selectedItems.isEmpty()) {
1258         return;
1259     }
1260
1261     QMimeData* data = m_model->createMimeData(selectedItems);
1262     if (!data) {
1263         return;
1264     }
1265
1266     // The created drag object will be owned and deleted
1267     // by QApplication::activeWindow().
1268     QDrag* drag = new QDrag(QApplication::activeWindow());
1269     drag->setMimeData(data);
1270
1271     const QPixmap pixmap = m_view->createDragPixmap(selectedItems);
1272     drag->setPixmap(pixmap);
1273
1274     const QPoint hotSpot((pixmap.width() / pixmap.devicePixelRatio()) / 2, 0);
1275     drag->setHotSpot(hotSpot);
1276
1277     drag->exec(Qt::MoveAction | Qt::CopyAction | Qt::LinkAction, Qt::CopyAction);
1278
1279     QAccessibleEvent accessibilityEvent(view(), QAccessible::DragDropStart);
1280     QAccessible::updateAccessibility(&accessibilityEvent);
1281 }
1282
1283 KItemListWidget* KItemListController::hoveredWidget() const
1284 {
1285     Q_ASSERT(m_view);
1286
1287     foreach (KItemListWidget* widget, m_view->visibleItemListWidgets()) {
1288         if (widget->isHovered()) {
1289             return widget;
1290         }
1291     }
1292
1293     return nullptr;
1294 }
1295
1296 KItemListWidget* KItemListController::widgetForPos(const QPointF& pos) const
1297 {
1298     Q_ASSERT(m_view);
1299
1300     foreach (KItemListWidget* widget, m_view->visibleItemListWidgets()) {
1301         const QPointF mappedPos = widget->mapFromItem(m_view, pos);
1302
1303         const bool hovered = widget->contains(mappedPos) &&
1304                              !widget->expansionToggleRect().contains(mappedPos);
1305         if (hovered) {
1306             return widget;
1307         }
1308     }
1309
1310     return nullptr;
1311 }
1312
1313 void KItemListController::updateKeyboardAnchor()
1314 {
1315     const bool validAnchor = m_keyboardAnchorIndex >= 0 &&
1316                              m_keyboardAnchorIndex < m_model->count() &&
1317                              keyboardAnchorPos(m_keyboardAnchorIndex) == m_keyboardAnchorPos;
1318     if (!validAnchor) {
1319         const int index = m_selectionManager->currentItem();
1320         m_keyboardAnchorIndex = index;
1321         m_keyboardAnchorPos = keyboardAnchorPos(index);
1322     }
1323 }
1324
1325 int KItemListController::nextRowIndex(int index) const
1326 {
1327     if (m_keyboardAnchorIndex < 0) {
1328         return index;
1329     }
1330
1331     const int maxIndex = m_model->count() - 1;
1332     if (index == maxIndex) {
1333         return index;
1334     }
1335
1336     // Calculate the index of the last column inside the row of the current index
1337     int lastColumnIndex = index;
1338     while (keyboardAnchorPos(lastColumnIndex + 1) > keyboardAnchorPos(lastColumnIndex)) {
1339         ++lastColumnIndex;
1340         if (lastColumnIndex >= maxIndex) {
1341             return index;
1342         }
1343     }
1344
1345     // Based on the last column index go to the next row and calculate the nearest index
1346     // that is below the current index
1347     int nextRowIndex = lastColumnIndex + 1;
1348     int searchIndex = nextRowIndex;
1349     qreal minDiff = qAbs(m_keyboardAnchorPos - keyboardAnchorPos(nextRowIndex));
1350     while (searchIndex < maxIndex && keyboardAnchorPos(searchIndex + 1) > keyboardAnchorPos(searchIndex)) {
1351         ++searchIndex;
1352         const qreal searchDiff = qAbs(m_keyboardAnchorPos - keyboardAnchorPos(searchIndex));
1353         if (searchDiff < minDiff) {
1354             minDiff = searchDiff;
1355             nextRowIndex = searchIndex;
1356         }
1357     }
1358
1359     return nextRowIndex;
1360 }
1361
1362 int KItemListController::previousRowIndex(int index) const
1363 {
1364     if (m_keyboardAnchorIndex < 0 || index == 0) {
1365         return index;
1366     }
1367
1368     // Calculate the index of the first column inside the row of the current index
1369     int firstColumnIndex = index;
1370     while (keyboardAnchorPos(firstColumnIndex - 1) < keyboardAnchorPos(firstColumnIndex)) {
1371         --firstColumnIndex;
1372         if (firstColumnIndex <= 0) {
1373             return index;
1374         }
1375     }
1376
1377     // Based on the first column index go to the previous row and calculate the nearest index
1378     // that is above the current index
1379     int previousRowIndex = firstColumnIndex - 1;
1380     int searchIndex = previousRowIndex;
1381     qreal minDiff = qAbs(m_keyboardAnchorPos - keyboardAnchorPos(previousRowIndex));
1382     while (searchIndex > 0 && keyboardAnchorPos(searchIndex - 1) < keyboardAnchorPos(searchIndex)) {
1383         --searchIndex;
1384         const qreal searchDiff = qAbs(m_keyboardAnchorPos - keyboardAnchorPos(searchIndex));
1385         if (searchDiff < minDiff) {
1386             minDiff = searchDiff;
1387             previousRowIndex = searchIndex;
1388         }
1389     }
1390
1391     return previousRowIndex;
1392 }
1393
1394 qreal KItemListController::keyboardAnchorPos(int index) const
1395 {
1396     const QRectF itemRect = m_view->itemRect(index);
1397     if (!itemRect.isEmpty()) {
1398         return (m_view->scrollOrientation() == Qt::Vertical) ? itemRect.x() : itemRect.y();
1399     }
1400
1401     return 0;
1402 }
1403
1404 void KItemListController::updateExtendedSelectionRegion()
1405 {
1406     if (m_view) {
1407         const bool extend = (m_selectionBehavior != MultiSelection);
1408         KItemListStyleOption option = m_view->styleOption();
1409         if (option.extendedSelectionRegion != extend) {
1410             option.extendedSelectionRegion = extend;
1411             m_view->setStyleOption(option);
1412         }
1413     }
1414 }
1415
1416 bool KItemListController::onPress(const QPoint& screenPos, const QPointF& pos, const Qt::KeyboardModifiers modifiers, const Qt::MouseButtons buttons)
1417 {
1418     emit mouseButtonPressed(m_pressedIndex, buttons);
1419
1420     if (buttons & (Qt::BackButton | Qt::ForwardButton)) {
1421         // Do not select items when clicking the back/forward buttons, see
1422         // https://bugs.kde.org/show_bug.cgi?id=327412.
1423         return true;
1424     }
1425
1426     if (m_view->isAboveExpansionToggle(m_pressedIndex, m_pressedMousePos)) {
1427         m_selectionManager->endAnchoredSelection();
1428         m_selectionManager->setCurrentItem(m_pressedIndex);
1429         m_selectionManager->beginAnchoredSelection(m_pressedIndex);
1430         return true;
1431     }
1432
1433     m_selectionTogglePressed = m_view->isAboveSelectionToggle(m_pressedIndex, m_pressedMousePos);
1434     if (m_selectionTogglePressed) {
1435         m_selectionManager->setSelected(m_pressedIndex, 1, KItemListSelectionManager::Toggle);
1436         // The previous anchored selection has been finished already in
1437         // KItemListSelectionManager::setSelected(). We can safely change
1438         // the current item and start a new anchored selection now.
1439         m_selectionManager->setCurrentItem(m_pressedIndex);
1440         m_selectionManager->beginAnchoredSelection(m_pressedIndex);
1441         return true;
1442     }
1443
1444     const bool shiftPressed = modifiers & Qt::ShiftModifier;
1445     const bool controlPressed = modifiers & Qt::ControlModifier;
1446
1447     // The previous selection is cleared if either
1448     // 1. The selection mode is SingleSelection, or
1449     // 2. the selection mode is MultiSelection, and *none* of the following conditions are met:
1450     //    a) Shift or Control are pressed.
1451     //    b) The clicked item is selected already. In that case, the user might want to:
1452     //       - start dragging multiple items, or
1453     //       - open the context menu and perform an action for all selected items.
1454     const bool shiftOrControlPressed = shiftPressed || controlPressed;
1455     const bool pressedItemAlreadySelected = m_pressedIndex >= 0 && m_selectionManager->isSelected(m_pressedIndex);
1456     const bool clearSelection = m_selectionBehavior == SingleSelection ||
1457                                 (!shiftOrControlPressed && !pressedItemAlreadySelected);
1458     if (clearSelection) {
1459         m_selectionManager->clearSelection();
1460     } else if (pressedItemAlreadySelected && !shiftOrControlPressed && (buttons & Qt::LeftButton)) {
1461         // The user might want to start dragging multiple items, but if he clicks the item
1462         // in order to trigger it instead, the other selected items must be deselected.
1463         // However, we do not know yet what the user is going to do.
1464         // -> remember that the user pressed an item which had been selected already and
1465         //    clear the selection in mouseReleaseEvent(), unless the items are dragged.
1466         m_clearSelectionIfItemsAreNotDragged = true;
1467
1468         if (m_selectionManager->selectedItems().count() == 1 && m_view->isAboveText(m_pressedIndex, m_pressedMousePos)) {
1469             emit selectedItemTextPressed(m_pressedIndex);
1470         }
1471     }
1472
1473     if (!shiftPressed) {
1474         // Finish the anchored selection before the current index is changed
1475         m_selectionManager->endAnchoredSelection();
1476     }
1477
1478     if (buttons & Qt::RightButton) {
1479         // Stop rubber band from persisting after right-clicks
1480         KItemListRubberBand* rubberBand = m_view->rubberBand();
1481         if (rubberBand->isActive()) {
1482             disconnect(rubberBand, &KItemListRubberBand::endPositionChanged, this, &KItemListController::slotRubberBandChanged);
1483             rubberBand->setActive(false);
1484             m_view->setAutoScroll(false);
1485         }
1486     }
1487
1488     if (m_pressedIndex >= 0) {
1489         m_selectionManager->setCurrentItem(m_pressedIndex);
1490
1491         switch (m_selectionBehavior) {
1492         case NoSelection:
1493             break;
1494
1495         case SingleSelection:
1496             m_selectionManager->setSelected(m_pressedIndex);
1497             break;
1498
1499         case MultiSelection:
1500             if (controlPressed && !shiftPressed) {
1501                 m_selectionManager->setSelected(m_pressedIndex, 1, KItemListSelectionManager::Toggle);
1502                 m_selectionManager->beginAnchoredSelection(m_pressedIndex);
1503             } else if (!shiftPressed || !m_selectionManager->isAnchoredSelectionActive()) {
1504                 // Select the pressed item and start a new anchored selection
1505                 m_selectionManager->setSelected(m_pressedIndex, 1, KItemListSelectionManager::Select);
1506                 m_selectionManager->beginAnchoredSelection(m_pressedIndex);
1507             }
1508             break;
1509
1510         default:
1511             Q_ASSERT(false);
1512             break;
1513         }
1514
1515         if (buttons & Qt::RightButton) {
1516             emit itemContextMenuRequested(m_pressedIndex, screenPos);
1517         }
1518
1519         return true;
1520     }
1521
1522     if (buttons & Qt::RightButton) {
1523         const QRectF headerBounds = m_view->headerBoundaries();
1524         if (headerBounds.contains(pos)) {
1525             emit headerContextMenuRequested(screenPos);
1526         } else {
1527             emit viewContextMenuRequested(screenPos);
1528         }
1529         return true;
1530     }
1531
1532     return false;
1533 }
1534
1535 bool KItemListController::onRelease(const QPointF& pos, const Qt::KeyboardModifiers modifiers, const Qt::MouseButtons buttons, bool touch)
1536 {
1537     const bool isAboveSelectionToggle = m_view->isAboveSelectionToggle(m_pressedIndex, m_pressedMousePos);
1538     if (isAboveSelectionToggle) {
1539         m_selectionTogglePressed = false;
1540         return true;
1541     }
1542
1543     if (!isAboveSelectionToggle && m_selectionTogglePressed) {
1544         m_selectionManager->setSelected(m_pressedIndex, 1, KItemListSelectionManager::Toggle);
1545         m_selectionTogglePressed = false;
1546         return true;
1547     }
1548
1549     const bool shiftOrControlPressed = modifiers & Qt::ShiftModifier ||
1550                                        modifiers & Qt::ControlModifier;
1551
1552     KItemListRubberBand* rubberBand = m_view->rubberBand();
1553     if (rubberBand->isActive()) {
1554         disconnect(rubberBand, &KItemListRubberBand::endPositionChanged, this, &KItemListController::slotRubberBandChanged);
1555         rubberBand->setActive(false);
1556         m_oldSelection.clear();
1557         m_view->setAutoScroll(false);
1558     }
1559
1560     const int index = m_view->itemAt(pos);
1561
1562     if (index >= 0 && index == m_pressedIndex) {
1563         // The release event is done above the same item as the press event
1564
1565         if (m_clearSelectionIfItemsAreNotDragged) {
1566             // A selected item has been clicked, but no drag operation has been started
1567             // -> clear the rest of the selection.
1568             m_selectionManager->clearSelection();
1569             m_selectionManager->setSelected(m_pressedIndex, 1, KItemListSelectionManager::Select);
1570             m_selectionManager->beginAnchoredSelection(m_pressedIndex);
1571         }
1572
1573         if (buttons & Qt::LeftButton) {
1574             bool emitItemActivated = true;
1575             if (m_view->isAboveExpansionToggle(index, pos)) {
1576                 const bool expanded = m_model->isExpanded(index);
1577                 m_model->setExpanded(index, !expanded);
1578
1579                 emit itemExpansionToggleClicked(index);
1580                 emitItemActivated = false;
1581             } else if (shiftOrControlPressed) {
1582                 // The mouse click should only update the selection, not trigger the item
1583                 emitItemActivated = false;
1584             } else if (!(m_view->style()->styleHint(QStyle::SH_ItemView_ActivateItemOnSingleClick) || m_singleClickActivationEnforced)) {
1585                 if (touch) {
1586                 emitItemActivated = true;
1587                 } else {
1588                 emitItemActivated = false;
1589                 }
1590             }
1591             if (emitItemActivated) {
1592                 emit itemActivated(index);
1593             }
1594         } else if (buttons & Qt::MiddleButton) {
1595             emit itemMiddleClicked(index);
1596         }
1597     }
1598
1599     m_pressedMousePos = QPointF();
1600     m_pressedIndex = -1;
1601     m_clearSelectionIfItemsAreNotDragged = false;
1602     return false;
1603 }
1604
1605 void KItemListController::startRubberBand()
1606 {
1607     if (m_selectionBehavior == MultiSelection) {
1608         QPointF startPos = m_pressedMousePos;
1609         if (m_view->scrollOrientation() == Qt::Vertical) {
1610             startPos.ry() += m_view->scrollOffset();
1611             if (m_view->itemSize().width() < 0) {
1612                 // Use a special rubberband for views that have only one column and
1613                 // expand the rubberband to use the whole width of the view.
1614                 startPos.setX(0);
1615             }
1616         } else {
1617             startPos.rx() += m_view->scrollOffset();
1618         }
1619
1620         m_oldSelection = m_selectionManager->selectedItems();
1621         KItemListRubberBand* rubberBand = m_view->rubberBand();
1622         rubberBand->setStartPosition(startPos);
1623         rubberBand->setEndPosition(startPos);
1624         rubberBand->setActive(true);
1625         connect(rubberBand, &KItemListRubberBand::endPositionChanged, this, &KItemListController::slotRubberBandChanged);
1626         m_view->setAutoScroll(true);
1627     }
1628 }
1629
1630 void KItemListController::slotStateChanged(QScroller::State newState)
1631 {
1632     if (newState == QScroller::Scrolling) {
1633         m_scrollerIsScrolling = true;
1634     } else if (newState == QScroller::Inactive) {
1635         m_scrollerIsScrolling = false;
1636     }
1637 }