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     if (buttons & (Qt::BackButton | Qt::ForwardButton)) {
 561         // Do not select items when clicking the back/forward buttons, see
 562         // https://bugs.kde.org/show_bug.cgi?id=327412.
 563         return true;
 564     }
 565
 566     return true;
 567 }
 568
 569 bool KItemListController::mouseMoveEvent(QGraphicsSceneMouseEvent* event, const QTransform& transform)
 570 {
 571     if (!m_view) {
 572         return false;
 573     }
 574
 575     if (m_view->m_tapAndHoldIndicator->isActive()) {
 576         m_view->m_tapAndHoldIndicator->setActive(false);
 577     }
 578
 579     if (event->source() == Qt::MouseEventSynthesizedByQt && !m_dragActionOrRightClick && m_isTouchEvent) {
 580         return false;
 581     }
 582
 583     if (m_pressedIndex >= 0) {
 584         // Check whether a dragging should be started
 585         if (event->buttons() & Qt::LeftButton) {
 586             const QPointF pos = transform.map(event->pos());
 587             if ((pos - m_pressedMousePos).manhattanLength() >= QApplication::startDragDistance()) {
 588                 if (!m_selectionManager->isSelected(m_pressedIndex)) {
 589                     // Always assure that the dragged item gets selected. Usually this is already
 590                     // done on the mouse-press event, but when using the selection-toggle on a
 591                     // selected item the dragged item is not selected yet.
 592                     m_selectionManager->setSelected(m_pressedIndex, 1, KItemListSelectionManager::Toggle);
 593                 } else {
 594                     // A selected item has been clicked to drag all selected items
 595                     // -> the selection should not be cleared when the mouse button is released.
 596                     m_clearSelectionIfItemsAreNotDragged = false;
 597                 }
 598                 startDragging();
 599                 m_mousePress = false;
 600             }
 601         }
 602     } else {
 603         KItemListRubberBand* rubberBand = m_view->rubberBand();
 604         if (rubberBand->isActive()) {
 605             QPointF endPos = transform.map(event->pos());
 606
 607             // Update the current item.
 608             const int newCurrent = m_view->itemAt(endPos);
 609             if (newCurrent >= 0) {
 610                 // It's expected that the new current index is also the new anchor (bug 163451).
 611                 m_selectionManager->endAnchoredSelection();
 612                 m_selectionManager->setCurrentItem(newCurrent);
 613                 m_selectionManager->beginAnchoredSelection(newCurrent);
 614             }
 615
 616             if (m_view->scrollOrientation() == Qt::Vertical) {
 617                 endPos.ry() += m_view->scrollOffset();
 618                 if (m_view->itemSize().width() < 0) {
 619                     // Use a special rubberband for views that have only one column and
 620                     // expand the rubberband to use the whole width of the view.
 621                     endPos.setX(m_view->size().width());
 622                 }
 623             } else {
 624                 endPos.rx() += m_view->scrollOffset();
 625             }
 626             rubberBand->setEndPosition(endPos);
 627         }
 628     }
 629
 630     return false;
 631 }
 632
 633 bool KItemListController::mouseReleaseEvent(QGraphicsSceneMouseEvent* event, const QTransform& transform)
 634 {
 635     m_mousePress = false;
 636     m_isTouchEvent = false;
 637
 638     if (!m_view) {
 639         return false;
 640     }
 641
 642     if (m_view->m_tapAndHoldIndicator->isActive()) {
 643         m_view->m_tapAndHoldIndicator->setActive(false);
 644     }
 645
 646     KItemListRubberBand* rubberBand = m_view->rubberBand();
 647     if (event->source() == Qt::MouseEventSynthesizedByQt && !rubberBand->isActive() && m_isTouchEvent) {
 648         return false;
 649     }
 650
 651     emit mouseButtonReleased(m_pressedIndex, event->buttons());
 652
 653     return onRelease(transform.map(event->pos()), event->modifiers(), event->button(), false);
 654 }
 655
 656 bool KItemListController::mouseDoubleClickEvent(QGraphicsSceneMouseEvent* event, const QTransform& transform)
 657 {
 658     const QPointF pos = transform.map(event->pos());
 659     const int index = m_view->itemAt(pos);
 660
 661     // Expand item if desired - See Bug 295573
 662     if (m_mouseDoubleClickAction != ActivateItemOnly) {
 663         if (m_view && m_model && m_view->supportsItemExpanding() && m_model->isExpandable(index)) {
 664             const bool expanded = m_model->isExpanded(index);
 665             m_model->setExpanded(index, !expanded);
 666         }
 667     }
 668
 669     if (event->button() & Qt::RightButton) {
 670         m_selectionManager->clearSelection();
 671         if (index >= 0) {
 672             m_selectionManager->setSelected(index);
 673             emit itemContextMenuRequested(index, event->screenPos());
 674         } else {
 675             const QRectF headerBounds = m_view->headerBoundaries();
 676             if (headerBounds.contains(event->pos())) {
 677                 emit headerContextMenuRequested(event->screenPos());
 678             } else {
 679                 emit viewContextMenuRequested(event->screenPos());
 680             }
 681         }
 682         return true;
 683     }
 684
 685     bool emitItemActivated = !(m_view->style()->styleHint(QStyle::SH_ItemView_ActivateItemOnSingleClick) || m_singleClickActivationEnforced) &&
 686                              (event->button() & Qt::LeftButton) &&
 687                              index >= 0 && index < m_model->count();
 688     if (emitItemActivated) {
 689         emit itemActivated(index);
 690     }
 691     return false;
 692 }
 693
 694 bool KItemListController::dragEnterEvent(QGraphicsSceneDragDropEvent* event, const QTransform& transform)
 695 {
 696     Q_UNUSED(event)
 697     Q_UNUSED(transform)
 698
 699     DragAndDropHelper::clearUrlListMatchesUrlCache();
 700
 701     return false;
 702 }
 703
 704 bool KItemListController::dragLeaveEvent(QGraphicsSceneDragDropEvent* event, const QTransform& transform)
 705 {
 706     Q_UNUSED(event)
 707     Q_UNUSED(transform)
 708
 709     m_autoActivationTimer->stop();
 710     m_view->setAutoScroll(false);
 711     m_view->hideDropIndicator();
 712
 713     KItemListWidget* widget = hoveredWidget();
 714     if (widget) {
 715         widget->setHovered(false);
 716         emit itemUnhovered(widget->index());
 717     }
 718     return false;
 719 }
 720
 721 bool KItemListController::dragMoveEvent(QGraphicsSceneDragDropEvent* event, const QTransform& transform)
 722 {
 723     if (!m_model || !m_view) {
 724         return false;
 725     }
 726
 727
 728     QUrl hoveredDir = m_model->directory();
 729     KItemListWidget* oldHoveredWidget = hoveredWidget();
 730
 731     const QPointF pos = transform.map(event->pos());
 732     KItemListWidget* newHoveredWidget = widgetForPos(pos);
 733
 734     if (oldHoveredWidget != newHoveredWidget) {
 735         m_autoActivationTimer->stop();
 736
 737         if (oldHoveredWidget) {
 738             oldHoveredWidget->setHovered(false);
 739             emit itemUnhovered(oldHoveredWidget->index());
 740         }
 741     }
 742
 743     if (newHoveredWidget) {
 744         bool droppingBetweenItems = false;
 745         if (m_model->sortRole().isEmpty()) {
 746             // The model supports inserting items between other items.
 747             droppingBetweenItems = (m_view->showDropIndicator(pos) >= 0);
 748         }
 749
 750         const int index = newHoveredWidget->index();
 751
 752         if (m_model->isDir(index)) {
 753             hoveredDir = m_model->url(index);
 754         }
 755
 756         if (!droppingBetweenItems) {
 757             if (m_model->supportsDropping(index)) {
 758                 // Something has been dragged on an item.
 759                 m_view->hideDropIndicator();
 760                 if (!newHoveredWidget->isHovered()) {
 761                     newHoveredWidget->setHovered(true);
 762                     emit itemHovered(index);
 763                 }
 764
 765                 if (!m_autoActivationTimer->isActive() && m_autoActivationTimer->interval() >= 0) {
 766                     m_autoActivationTimer->setProperty("index", index);
 767                     m_autoActivationTimer->start();
 768                 }
 769             }
 770         } else {
 771             m_autoActivationTimer->stop();
 772             if (newHoveredWidget && newHoveredWidget->isHovered()) {
 773                 newHoveredWidget->setHovered(false);
 774                 emit itemUnhovered(index);
 775             }
 776         }
 777     } else {
 778         m_view->hideDropIndicator();
 779     }
 780
 781     if (DragAndDropHelper::urlListMatchesUrl(event->mimeData()->urls(), hoveredDir)) {
 782         event->setDropAction(Qt::IgnoreAction);
 783         event->ignore();
 784     } else {
 785         event->setDropAction(event->proposedAction());
 786         event->accept();
 787     }
 788     return false;
 789 }
 790
 791 bool KItemListController::dropEvent(QGraphicsSceneDragDropEvent* event, const QTransform& transform)
 792 {
 793     if (!m_view) {
 794         return false;
 795     }
 796
 797     m_autoActivationTimer->stop();
 798     m_view->setAutoScroll(false);
 799
 800     const QPointF pos = transform.map(event->pos());
 801
 802     int dropAboveIndex = -1;
 803     if (m_model->sortRole().isEmpty()) {
 804         // The model supports inserting of items between other items.
 805         dropAboveIndex = m_view->showDropIndicator(pos);
 806     }
 807
 808     if (dropAboveIndex >= 0) {
 809         // Something has been dropped between two items.
 810         m_view->hideDropIndicator();
 811         emit aboveItemDropEvent(dropAboveIndex, event);
 812     } else if (!event->mimeData()->hasFormat(m_model->blacklistItemDropEventMimeType())) {
 813         // Something has been dropped on an item or on an empty part of the view.
 814         emit itemDropEvent(m_view->itemAt(pos), event);
 815     }
 816
 817     QAccessibleEvent accessibilityEvent(view(), QAccessible::DragDropEnd);
 818     QAccessible::updateAccessibility(&accessibilityEvent);
 819
 820     return true;
 821 }
 822
 823 bool KItemListController::hoverEnterEvent(QGraphicsSceneHoverEvent* event, const QTransform& transform)
 824 {
 825     Q_UNUSED(event)
 826     Q_UNUSED(transform)
 827     return false;
 828 }
 829
 830 bool KItemListController::hoverMoveEvent(QGraphicsSceneHoverEvent* event, const QTransform& transform)
 831 {
 832     Q_UNUSED(transform)
 833     if (!m_model || !m_view) {
 834         return false;
 835     }
 836
 837     KItemListWidget* oldHoveredWidget = hoveredWidget();
 838     const QPointF pos = transform.map(event->pos());
 839     KItemListWidget* newHoveredWidget = widgetForPos(pos);
 840
 841     if (oldHoveredWidget != newHoveredWidget) {
 842         if (oldHoveredWidget) {
 843             oldHoveredWidget->setHovered(false);
 844             emit itemUnhovered(oldHoveredWidget->index());
 845         }
 846
 847         if (newHoveredWidget) {
 848             newHoveredWidget->setHovered(true);
 849             const QPointF mappedPos = newHoveredWidget->mapFromItem(m_view, pos);
 850             newHoveredWidget->setHoverPosition(mappedPos);
 851             emit itemHovered(newHoveredWidget->index());
 852         }
 853     } else if (oldHoveredWidget) {
 854         const QPointF mappedPos = oldHoveredWidget->mapFromItem(m_view, pos);
 855         oldHoveredWidget->setHoverPosition(mappedPos);
 856     }
 857
 858     return false;
 859 }
 860
 861 bool KItemListController::hoverLeaveEvent(QGraphicsSceneHoverEvent* event, const QTransform& transform)
 862 {
 863     Q_UNUSED(event)
 864     Q_UNUSED(transform)
 865
 866     m_mousePress = false;
 867     m_isTouchEvent = false;
 868
 869     if (!m_model || !m_view) {
 870         return false;
 871     }
 872
 873     foreach (KItemListWidget* widget, m_view->visibleItemListWidgets()) {
 874         if (widget->isHovered()) {
 875             widget->setHovered(false);
 876             emit itemUnhovered(widget->index());
 877         }
 878     }
 879     return false;
 880 }
 881
 882 bool KItemListController::wheelEvent(QGraphicsSceneWheelEvent* event, const QTransform& transform)
 883 {
 884     Q_UNUSED(event)
 885     Q_UNUSED(transform)
 886     return false;
 887 }
 888
 889 bool KItemListController::resizeEvent(QGraphicsSceneResizeEvent* event, const QTransform& transform)
 890 {
 891     Q_UNUSED(event)
 892     Q_UNUSED(transform)
 893     return false;
 894 }
 895
 896 bool KItemListController::gestureEvent(QGestureEvent* event, const QTransform& transform)
 897 {
 898     if (!m_view) {
 899         return false;
 900     }
 901
 902     //you can touch on different views at the same time, but only one QWidget gets a mousePressEvent
 903     //we use this to get the right QWidget
 904     //the only exception is a tap gesture with state GestureStarted, we need to reset some variable
 905     if (!m_mousePress) {
 906         if (QGesture* tap = event->gesture(Qt::TapGesture)) {
 907             QTapGesture* tapGesture = static_cast<QTapGesture*>(tap);
 908             if (tapGesture->state() == Qt::GestureStarted) {
 909                 tapTriggered(tapGesture, transform);
 910             }
 911         }
 912         return false;
 913     }
 914
 915     bool accepted = false;
 916
 917     if (QGesture* tap = event->gesture(Qt::TapGesture)) {
 918         tapTriggered(static_cast<QTapGesture*>(tap), transform);
 919         accepted = true;
 920     }
 921     if (event->gesture(Qt::TapAndHoldGesture)) {
 922         tapAndHoldTriggered(event, transform);
 923         accepted = true;
 924     }
 925     if (event->gesture(Qt::PinchGesture)) {
 926         pinchTriggered(event, transform);
 927         accepted = true;
 928     }
 929     if (event->gesture(m_swipeGesture)) {
 930         swipeTriggered(event, transform);
 931         accepted = true;
 932     }
 933     if (event->gesture(m_twoFingerTapGesture)) {
 934         twoFingerTapTriggered(event, transform);
 935         accepted = true;
 936     }
 937     return accepted;
 938 }
 939
 940 bool KItemListController::touchBeginEvent(QTouchEvent* event, const QTransform& transform)
 941 {
 942     Q_UNUSED(event)
 943     Q_UNUSED(transform)
 944
 945     m_isTouchEvent = true;
 946     return false;
 947 }
 948
 949 void KItemListController::tapTriggered(QTapGesture* tap, const QTransform& transform)
 950 {
 951     static bool scrollerWasActive = false;
 952
 953     if (tap->state() == Qt::GestureStarted) {
 954         m_dragActionOrRightClick = false;
 955         m_isSwipeGesture = false;
 956         m_pinchGestureInProgress = false;
 957         scrollerWasActive = m_scrollerIsScrolling;
 958     }
 959
 960     if (tap->state() == Qt::GestureFinished) {
 961         m_mousePress = false;
 962
 963         //if at the moment of the gesture start the QScroller was active, the user made the tap
 964         //to stop the QScroller and not to tap on an item
 965         if (scrollerWasActive) {
 966             return;
 967         }
 968
 969         if (m_view->m_tapAndHoldIndicator->isActive()) {
 970             m_view->m_tapAndHoldIndicator->setActive(false);
 971         }
 972
 973         m_pressedMousePos = transform.map(tap->position());
 974         m_pressedIndex = m_view->itemAt(m_pressedMousePos);
 975
 976         if (m_dragActionOrRightClick) {
 977             onPress(tap->hotSpot().toPoint(), tap->position().toPoint(), Qt::NoModifier, Qt::RightButton);
 978             onRelease(transform.map(tap->position()), Qt::NoModifier, Qt::RightButton, false);
 979             m_dragActionOrRightClick = false;
 980         }
 981         else {
 982             onPress(tap->hotSpot().toPoint(), tap->position().toPoint(), Qt::NoModifier, Qt::LeftButton);
 983             onRelease(transform.map(tap->position()), Qt::NoModifier, Qt::LeftButton, true);
 984         }
 985         m_isTouchEvent = false;
 986     }
 987 }
 988
 989 void KItemListController::tapAndHoldTriggered(QGestureEvent* event, const QTransform& transform)
 990 {
 991
 992     //the Qt TabAndHold gesture is triggerable with a mouse click, we don't want this
 993     if (!m_isTouchEvent) {
 994         return;
 995     }
 996
 997     const QTapAndHoldGesture* tap = static_cast<QTapAndHoldGesture*>(event->gesture(Qt::TapAndHoldGesture));
 998     if (tap->state() == Qt::GestureFinished) {
 999         //if a pinch gesture is in progress we don't want a TabAndHold gesture
1000         if (m_pinchGestureInProgress) {
1001             return;
1002         }
1003         m_pressedMousePos = transform.map(event->mapToGraphicsScene(tap->position()));
1004         m_pressedIndex = m_view->itemAt(m_pressedMousePos);
1005
1006         if (m_pressedIndex >= 0 && !m_selectionManager->isSelected(m_pressedIndex)) {
1007             m_selectionManager->clearSelection();
1008             m_selectionManager->setSelected(m_pressedIndex);
1009         } else if (m_pressedIndex == -1) {
1010             m_selectionManager->clearSelection();
1011             startRubberBand();
1012         }
1013
1014         emit scrollerStop();
1015
1016         m_view->m_tapAndHoldIndicator->setStartPosition(m_pressedMousePos);
1017         m_view->m_tapAndHoldIndicator->setActive(true);
1018
1019         m_dragActionOrRightClick = true;
1020     }
1021 }
1022
1023 void KItemListController::pinchTriggered(QGestureEvent* event, const QTransform& transform)
1024 {
1025     Q_UNUSED(transform)
1026
1027     const QPinchGesture* pinch = static_cast<QPinchGesture*>(event->gesture(Qt::PinchGesture));
1028     const qreal sensitivityModifier = 0.2;
1029     static qreal counter = 0;
1030
1031     if (pinch->state() == Qt::GestureStarted) {
1032         m_pinchGestureInProgress = true;
1033         counter = 0;
1034     }
1035     if (pinch->state() == Qt::GestureUpdated) {
1036         //if a swipe gesture was recognized or in progress, we don't want a pinch gesture to change the zoom
1037         if (m_isSwipeGesture) {
1038             return;
1039         }
1040         counter = counter + (pinch->scaleFactor() - 1);
1041         if (counter >= sensitivityModifier) {
1042             emit increaseZoom();
1043             counter = 0;
1044         } else if (counter <= -sensitivityModifier) {
1045             emit decreaseZoom();
1046             counter = 0;
1047         }
1048     }
1049 }
1050
1051 void KItemListController::swipeTriggered(QGestureEvent* event, const QTransform& transform)
1052 {
1053     Q_UNUSED(transform)
1054
1055     const KTwoFingerSwipe* swipe = static_cast<KTwoFingerSwipe*>(event->gesture(m_swipeGesture));
1056
1057     if (!swipe) {
1058         return;
1059     }
1060     if (swipe->state() == Qt::GestureStarted) {
1061         m_isSwipeGesture = true;
1062     }
1063
1064     if (swipe->state() == Qt::GestureCanceled) {
1065         m_isSwipeGesture = false;
1066     }
1067
1068     if (swipe->state() == Qt::GestureFinished) {
1069         emit scrollerStop();
1070
1071         if (swipe->swipeAngle() <= 20 || swipe->swipeAngle() >= 340) {
1072             emit mouseButtonPressed(m_pressedIndex, Qt::BackButton);
1073         } else if (swipe->swipeAngle() <= 200 && swipe->swipeAngle() >= 160) {
1074             emit mouseButtonPressed(m_pressedIndex, Qt::ForwardButton);
1075         } else if (swipe->swipeAngle() <= 110 && swipe->swipeAngle() >= 60) {
1076             emit swipeUp();
1077         }
1078         m_isSwipeGesture = true;
1079     }
1080 }
1081
1082 void KItemListController::twoFingerTapTriggered(QGestureEvent* event, const QTransform& transform)
1083 {
1084     const KTwoFingerTap* twoTap = static_cast<KTwoFingerTap*>(event->gesture(m_twoFingerTapGesture));
1085
1086     if (!twoTap) {
1087         return;
1088     }
1089
1090     if (twoTap->state() == Qt::GestureStarted) {
1091         m_pressedMousePos = transform.map(twoTap->pos());
1092         m_pressedIndex = m_view->itemAt(m_pressedMousePos);
1093         if (m_pressedIndex >= 0) {
1094             onPress(twoTap->screenPos().toPoint(), twoTap->pos().toPoint(), Qt::ControlModifier, Qt::LeftButton);
1095             onRelease(transform.map(twoTap->pos()), Qt::ControlModifier, Qt::LeftButton, false);
1096         }
1097
1098     }
1099 }
1100
1101 bool KItemListController::processEvent(QEvent* event, const QTransform& transform)
1102 {
1103     if (!event) {
1104         return false;
1105     }
1106
1107     switch (event->type()) {
1108     case QEvent::KeyPress:
1109         return keyPressEvent(static_cast<QKeyEvent*>(event));
1110     case QEvent::InputMethod:
1111         return inputMethodEvent(static_cast<QInputMethodEvent*>(event));
1112     case QEvent::GraphicsSceneMousePress:
1113         return mousePressEvent(static_cast<QGraphicsSceneMouseEvent*>(event), QTransform());
1114     case QEvent::GraphicsSceneMouseMove:
1115         return mouseMoveEvent(static_cast<QGraphicsSceneMouseEvent*>(event), QTransform());
1116     case QEvent::GraphicsSceneMouseRelease:
1117         return mouseReleaseEvent(static_cast<QGraphicsSceneMouseEvent*>(event), QTransform());
1118     case QEvent::GraphicsSceneMouseDoubleClick:
1119         return mouseDoubleClickEvent(static_cast<QGraphicsSceneMouseEvent*>(event), QTransform());
1120     case QEvent::GraphicsSceneWheel:
1121          return wheelEvent(static_cast<QGraphicsSceneWheelEvent*>(event), QTransform());
1122     case QEvent::GraphicsSceneDragEnter:
1123         return dragEnterEvent(static_cast<QGraphicsSceneDragDropEvent*>(event), QTransform());
1124     case QEvent::GraphicsSceneDragLeave:
1125         return dragLeaveEvent(static_cast<QGraphicsSceneDragDropEvent*>(event), QTransform());
1126     case QEvent::GraphicsSceneDragMove:
1127         return dragMoveEvent(static_cast<QGraphicsSceneDragDropEvent*>(event), QTransform());
1128     case QEvent::GraphicsSceneDrop:
1129         return dropEvent(static_cast<QGraphicsSceneDragDropEvent*>(event), QTransform());
1130     case QEvent::GraphicsSceneHoverEnter:
1131         return hoverEnterEvent(static_cast<QGraphicsSceneHoverEvent*>(event), QTransform());
1132     case QEvent::GraphicsSceneHoverMove:
1133         return hoverMoveEvent(static_cast<QGraphicsSceneHoverEvent*>(event), QTransform());
1134     case QEvent::GraphicsSceneHoverLeave:
1135         return hoverLeaveEvent(static_cast<QGraphicsSceneHoverEvent*>(event), QTransform());
1136     case QEvent::GraphicsSceneResize:
1137         return resizeEvent(static_cast<QGraphicsSceneResizeEvent*>(event), transform);
1138     case QEvent::Gesture:
1139         return gestureEvent(static_cast<QGestureEvent*>(event), transform);
1140     case QEvent::TouchBegin:
1141         return touchBeginEvent(static_cast<QTouchEvent*>(event), transform);
1142     default:
1143         break;
1144     }
1145
1146     return false;
1147 }
1148
1149 void KItemListController::slotViewScrollOffsetChanged(qreal current, qreal previous)
1150 {
1151     if (!m_view) {
1152         return;
1153     }
1154
1155     KItemListRubberBand* rubberBand = m_view->rubberBand();
1156     if (rubberBand->isActive()) {
1157         const qreal diff = current - previous;
1158         // TODO: Ideally just QCursor::pos() should be used as
1159         // new end-position but it seems there is no easy way
1160         // to have something like QWidget::mapFromGlobal() for QGraphicsWidget
1161         // (... or I just missed an easy way to do the mapping)
1162         QPointF endPos = rubberBand->endPosition();
1163         if (m_view->scrollOrientation() == Qt::Vertical) {
1164             endPos.ry() += diff;
1165         } else {
1166             endPos.rx() += diff;
1167         }
1168
1169         rubberBand->setEndPosition(endPos);
1170     }
1171 }
1172
1173 void KItemListController::slotRubberBandChanged()
1174 {
1175     if (!m_view || !m_model || m_model->count() <= 0) {
1176         return;
1177     }
1178
1179     const KItemListRubberBand* rubberBand = m_view->rubberBand();
1180     const QPointF startPos = rubberBand->startPosition();
1181     const QPointF endPos = rubberBand->endPosition();
1182     QRectF rubberBandRect = QRectF(startPos, endPos).normalized();
1183
1184     const bool scrollVertical = (m_view->scrollOrientation() == Qt::Vertical);
1185     if (scrollVertical) {
1186         rubberBandRect.translate(0, -m_view->scrollOffset());
1187     } else {
1188         rubberBandRect.translate(-m_view->scrollOffset(), 0);
1189     }
1190
1191     if (!m_oldSelection.isEmpty()) {
1192         // Clear the old selection that was available before the rubberband has
1193         // been activated in case if no Shift- or Control-key are pressed
1194         const bool shiftOrControlPressed = QApplication::keyboardModifiers() & Qt::ShiftModifier ||
1195                                            QApplication::keyboardModifiers() & Qt::ControlModifier;
1196         if (!shiftOrControlPressed) {
1197             m_oldSelection.clear();
1198         }
1199     }
1200
1201     KItemSet selectedItems;
1202
1203     // Select all visible items that intersect with the rubberband
1204     foreach (const KItemListWidget* widget, m_view->visibleItemListWidgets()) {
1205         const int index = widget->index();
1206
1207         const QRectF widgetRect = m_view->itemRect(index);
1208         if (widgetRect.intersects(rubberBandRect)) {
1209             const QRectF iconRect = widget->iconRect().translated(widgetRect.topLeft());
1210             const QRectF textRect = widget->textRect().translated(widgetRect.topLeft());
1211             if (iconRect.intersects(rubberBandRect) || textRect.intersects(rubberBandRect)) {
1212                 selectedItems.insert(index);
1213             }
1214         }
1215     }
1216
1217     // Select all invisible items that intersect with the rubberband. Instead of
1218     // iterating all items only the area which might be touched by the rubberband
1219     // will be checked.
1220     const bool increaseIndex = scrollVertical ?
1221                                startPos.y() > endPos.y(): startPos.x() > endPos.x();
1222
1223     int index = increaseIndex ? m_view->lastVisibleIndex() + 1 : m_view->firstVisibleIndex() - 1;
1224     bool selectionFinished = false;
1225     do {
1226         const QRectF widgetRect = m_view->itemRect(index);
1227         if (widgetRect.intersects(rubberBandRect)) {
1228             selectedItems.insert(index);
1229         }
1230
1231         if (increaseIndex) {
1232             ++index;
1233             selectionFinished = (index >= m_model->count()) ||
1234                                 ( scrollVertical && widgetRect.top()  > rubberBandRect.bottom()) ||
1235                                 (!scrollVertical && widgetRect.left() > rubberBandRect.right());
1236         } else {
1237             --index;
1238             selectionFinished = (index < 0) ||
1239                                 ( scrollVertical && widgetRect.bottom() < rubberBandRect.top()) ||
1240                                 (!scrollVertical && widgetRect.right()  < rubberBandRect.left());
1241         }
1242     } while (!selectionFinished);
1243
1244     if (QApplication::keyboardModifiers() & Qt::ControlModifier) {
1245         // If Control is pressed, the selection state of all items in the rubberband is toggled.
1246         // Therefore, the new selection contains:
1247         // 1. All previously selected items which are not inside the rubberband, and
1248         // 2. all items inside the rubberband which have not been selected previously.
1249         m_selectionManager->setSelectedItems(m_oldSelection ^ selectedItems);
1250     }
1251     else {
1252         m_selectionManager->setSelectedItems(selectedItems + m_oldSelection);
1253     }
1254 }
1255
1256 void KItemListController::startDragging()
1257 {
1258     if (!m_view || !m_model) {
1259         return;
1260     }
1261
1262     const KItemSet selectedItems = m_selectionManager->selectedItems();
1263     if (selectedItems.isEmpty()) {
1264         return;
1265     }
1266
1267     QMimeData* data = m_model->createMimeData(selectedItems);
1268     if (!data) {
1269         return;
1270     }
1271
1272     // The created drag object will be owned and deleted
1273     // by QApplication::activeWindow().
1274     QDrag* drag = new QDrag(QApplication::activeWindow());
1275     drag->setMimeData(data);
1276
1277     const QPixmap pixmap = m_view->createDragPixmap(selectedItems);
1278     drag->setPixmap(pixmap);
1279
1280     const QPoint hotSpot((pixmap.width() / pixmap.devicePixelRatio()) / 2, 0);
1281     drag->setHotSpot(hotSpot);
1282
1283     drag->exec(Qt::MoveAction | Qt::CopyAction | Qt::LinkAction, Qt::CopyAction);
1284
1285     QAccessibleEvent accessibilityEvent(view(), QAccessible::DragDropStart);
1286     QAccessible::updateAccessibility(&accessibilityEvent);
1287 }
1288
1289 KItemListWidget* KItemListController::hoveredWidget() const
1290 {
1291     Q_ASSERT(m_view);
1292
1293     foreach (KItemListWidget* widget, m_view->visibleItemListWidgets()) {
1294         if (widget->isHovered()) {
1295             return widget;
1296         }
1297     }
1298
1299     return nullptr;
1300 }
1301
1302 KItemListWidget* KItemListController::widgetForPos(const QPointF& pos) const
1303 {
1304     Q_ASSERT(m_view);
1305
1306     foreach (KItemListWidget* widget, m_view->visibleItemListWidgets()) {
1307         const QPointF mappedPos = widget->mapFromItem(m_view, pos);
1308
1309         const bool hovered = widget->contains(mappedPos) &&
1310                              !widget->expansionToggleRect().contains(mappedPos);
1311         if (hovered) {
1312             return widget;
1313         }
1314     }
1315
1316     return nullptr;
1317 }
1318
1319 void KItemListController::updateKeyboardAnchor()
1320 {
1321     const bool validAnchor = m_keyboardAnchorIndex >= 0 &&
1322                              m_keyboardAnchorIndex < m_model->count() &&
1323                              keyboardAnchorPos(m_keyboardAnchorIndex) == m_keyboardAnchorPos;
1324     if (!validAnchor) {
1325         const int index = m_selectionManager->currentItem();
1326         m_keyboardAnchorIndex = index;
1327         m_keyboardAnchorPos = keyboardAnchorPos(index);
1328     }
1329 }
1330
1331 int KItemListController::nextRowIndex(int index) const
1332 {
1333     if (m_keyboardAnchorIndex < 0) {
1334         return index;
1335     }
1336
1337     const int maxIndex = m_model->count() - 1;
1338     if (index == maxIndex) {
1339         return index;
1340     }
1341
1342     // Calculate the index of the last column inside the row of the current index
1343     int lastColumnIndex = index;
1344     while (keyboardAnchorPos(lastColumnIndex + 1) > keyboardAnchorPos(lastColumnIndex)) {
1345         ++lastColumnIndex;
1346         if (lastColumnIndex >= maxIndex) {
1347             return index;
1348         }
1349     }
1350
1351     // Based on the last column index go to the next row and calculate the nearest index
1352     // that is below the current index
1353     int nextRowIndex = lastColumnIndex + 1;
1354     int searchIndex = nextRowIndex;
1355     qreal minDiff = qAbs(m_keyboardAnchorPos - keyboardAnchorPos(nextRowIndex));
1356     while (searchIndex < maxIndex && keyboardAnchorPos(searchIndex + 1) > keyboardAnchorPos(searchIndex)) {
1357         ++searchIndex;
1358         const qreal searchDiff = qAbs(m_keyboardAnchorPos - keyboardAnchorPos(searchIndex));
1359         if (searchDiff < minDiff) {
1360             minDiff = searchDiff;
1361             nextRowIndex = searchIndex;
1362         }
1363     }
1364
1365     return nextRowIndex;
1366 }
1367
1368 int KItemListController::previousRowIndex(int index) const
1369 {
1370     if (m_keyboardAnchorIndex < 0 || index == 0) {
1371         return index;
1372     }
1373
1374     // Calculate the index of the first column inside the row of the current index
1375     int firstColumnIndex = index;
1376     while (keyboardAnchorPos(firstColumnIndex - 1) < keyboardAnchorPos(firstColumnIndex)) {
1377         --firstColumnIndex;
1378         if (firstColumnIndex <= 0) {
1379             return index;
1380         }
1381     }
1382
1383     // Based on the first column index go to the previous row and calculate the nearest index
1384     // that is above the current index
1385     int previousRowIndex = firstColumnIndex - 1;
1386     int searchIndex = previousRowIndex;
1387     qreal minDiff = qAbs(m_keyboardAnchorPos - keyboardAnchorPos(previousRowIndex));
1388     while (searchIndex > 0 && keyboardAnchorPos(searchIndex - 1) < keyboardAnchorPos(searchIndex)) {
1389         --searchIndex;
1390         const qreal searchDiff = qAbs(m_keyboardAnchorPos - keyboardAnchorPos(searchIndex));
1391         if (searchDiff < minDiff) {
1392             minDiff = searchDiff;
1393             previousRowIndex = searchIndex;
1394         }
1395     }
1396
1397     return previousRowIndex;
1398 }
1399
1400 qreal KItemListController::keyboardAnchorPos(int index) const
1401 {
1402     const QRectF itemRect = m_view->itemRect(index);
1403     if (!itemRect.isEmpty()) {
1404         return (m_view->scrollOrientation() == Qt::Vertical) ? itemRect.x() : itemRect.y();
1405     }
1406
1407     return 0;
1408 }
1409
1410 void KItemListController::updateExtendedSelectionRegion()
1411 {
1412     if (m_view) {
1413         const bool extend = (m_selectionBehavior != MultiSelection);
1414         KItemListStyleOption option = m_view->styleOption();
1415         if (option.extendedSelectionRegion != extend) {
1416             option.extendedSelectionRegion = extend;
1417             m_view->setStyleOption(option);
1418         }
1419     }
1420 }
1421
1422 bool KItemListController::onPress(const QPoint& screenPos, const QPointF& pos, const Qt::KeyboardModifiers modifiers, const Qt::MouseButtons buttons)
1423 {
1424     emit mouseButtonPressed(m_pressedIndex, buttons);
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 }