src/kitemviews/kitemlistcontroller.cpp

   1 /***************************************************************************
   2  *   Copyright (C) 2011 by Peter Penz <peter.penz19@gmail.com>             *
   3  *   Copyright (C) 2012 by Frank Reininghaus <frank78ac@googlemail.com>    *
   4  *                                                                         *
   5  *   Based on the Itemviews NG project from Trolltech Labs                 *
   6  *                                                                         *
   7  *   This program is free software; you can redistribute it and/or modify  *
   8  *   it under the terms of the GNU General Public License as published by  *
   9  *   the Free Software Foundation; either version 2 of the License, or     *
  10  *   (at your option) any later version.                                   *
  11  *                                                                         *
  12  *   This program is distributed in the hope that it will be useful,       *
  13  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  14  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  15  *   GNU General Public License for more details.                          *
  16  *                                                                         *
  17  *   You should have received a copy of the GNU General Public License     *
  18  *   along with this program; if not, write to the                         *
  19  *   Free Software Foundation, Inc.,                                       *
  20  *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA            *
  21  ***************************************************************************/
  22
  23 #include "kitemlistcontroller.h"
  24
  25 #include "kitemlistselectionmanager.h"
  26 #include "kitemlistview.h"
  27 #include "private/kitemlistkeyboardsearchmanager.h"
  28 #include "private/kitemlistrubberband.h"
  29 #include "views/draganddrophelper.h"
  30
  31 #include <QAccessible>
  32 #include <QApplication>
  33 #include <QDrag>
  34 #include <QGraphicsScene>
  35 #include <QGraphicsSceneEvent>
  36 #include <QGraphicsView>
  37 #include <QMimeData>
  38 #include <QTimer>
  39
  40 KItemListController::KItemListController(KItemModelBase* model, KItemListView* view, QObject* parent) :
  41     QObject(parent),
  42     m_singleClickActivationEnforced(false),
  43     m_selectionTogglePressed(false),
  44     m_clearSelectionIfItemsAreNotDragged(false),
  45     m_selectionBehavior(NoSelection),
  46     m_autoActivationBehavior(ActivationAndExpansion),
  47     m_mouseDoubleClickAction(ActivateItemOnly),
  48     m_model(nullptr),
  49     m_view(nullptr),
  50     m_selectionManager(new KItemListSelectionManager(this)),
  51     m_keyboardManager(new KItemListKeyboardSearchManager(this)),
  52     m_pressedIndex(-1),
  53     m_pressedMousePos(),
  54     m_autoActivationTimer(nullptr),
  55     m_oldSelection(),
  56     m_keyboardAnchorIndex(-1),
  57     m_keyboardAnchorPos(0)
  58 {
  59     connect(m_keyboardManager, &KItemListKeyboardSearchManager::changeCurrentItem,
  60             this, &KItemListController::slotChangeCurrentItem);
  61     connect(m_selectionManager, &KItemListSelectionManager::currentChanged,
  62             m_keyboardManager, &KItemListKeyboardSearchManager::slotCurrentChanged);
  63     connect(m_selectionManager, &KItemListSelectionManager::selectionChanged,
  64             m_keyboardManager, &KItemListKeyboardSearchManager::slotSelectionChanged);
  65
  66     m_autoActivationTimer = new QTimer(this);
  67     m_autoActivationTimer->setSingleShot(true);
  68     m_autoActivationTimer->setInterval(-1);
  69     connect(m_autoActivationTimer, &QTimer::timeout, this, &KItemListController::slotAutoActivationTimeout);
  70
  71     setModel(model);
  72     setView(view);
  73 }
  74
  75 KItemListController::~KItemListController()
  76 {
  77     setView(nullptr);
  78     Q_ASSERT(!m_view);
  79
  80     setModel(nullptr);
  81     Q_ASSERT(!m_model);
  82 }
  83
  84 void KItemListController::setModel(KItemModelBase* model)
  85 {
  86     if (m_model == model) {
  87         return;
  88     }
  89
  90     KItemModelBase* oldModel = m_model;
  91     if (oldModel) {
  92         oldModel->deleteLater();
  93     }
  94
  95     m_model = model;
  96     if (m_model) {
  97         m_model->setParent(this);
  98     }
  99
 100     if (m_view) {
 101         m_view->setModel(m_model);
 102     }
 103
 104     m_selectionManager->setModel(m_model);
 105
 106     emit modelChanged(m_model, oldModel);
 107 }
 108
 109 KItemModelBase* KItemListController::model() const
 110 {
 111     return m_model;
 112 }
 113
 114 KItemListSelectionManager* KItemListController::selectionManager() const
 115 {
 116     return m_selectionManager;
 117 }
 118
 119 void KItemListController::setView(KItemListView* view)
 120 {
 121     if (m_view == view) {
 122         return;
 123     }
 124
 125     KItemListView* oldView = m_view;
 126     if (oldView) {
 127         disconnect(oldView, &KItemListView::scrollOffsetChanged, this, &KItemListController::slotViewScrollOffsetChanged);
 128         oldView->deleteLater();
 129     }
 130
 131     m_view = view;
 132
 133     if (m_view) {
 134         m_view->setParent(this);
 135         m_view->setController(this);
 136         m_view->setModel(m_model);
 137         connect(m_view, &KItemListView::scrollOffsetChanged, this, &KItemListController::slotViewScrollOffsetChanged);
 138         updateExtendedSelectionRegion();
 139     }
 140
 141     emit viewChanged(m_view, oldView);
 142 }
 143
 144 KItemListView* KItemListController::view() const
 145 {
 146     return m_view;
 147 }
 148
 149 void KItemListController::setSelectionBehavior(SelectionBehavior behavior)
 150 {
 151     m_selectionBehavior = behavior;
 152     updateExtendedSelectionRegion();
 153 }
 154
 155 KItemListController::SelectionBehavior KItemListController::selectionBehavior() const
 156 {
 157     return m_selectionBehavior;
 158 }
 159
 160 void KItemListController::setAutoActivationBehavior(AutoActivationBehavior behavior)
 161 {
 162     m_autoActivationBehavior = behavior;
 163 }
 164
 165 KItemListController::AutoActivationBehavior KItemListController::autoActivationBehavior() const
 166 {
 167     return m_autoActivationBehavior;
 168 }
 169
 170 void KItemListController::setMouseDoubleClickAction(MouseDoubleClickAction action)
 171 {
 172     m_mouseDoubleClickAction = action;
 173 }
 174
 175 KItemListController::MouseDoubleClickAction KItemListController::mouseDoubleClickAction() const
 176 {
 177     return m_mouseDoubleClickAction;
 178 }
 179
 180 int KItemListController::indexCloseToMousePressedPosition() const
 181 {
 182     QHashIterator<KItemListWidget*, KItemListGroupHeader*> it(m_view->m_visibleGroups);
 183     while (it.hasNext()) {
 184         it.next();
 185         KItemListGroupHeader *groupHeader = it.value();
 186         const QPointF mappedToGroup = groupHeader->mapFromItem(nullptr, m_pressedMousePos);
 187         if (groupHeader->contains(mappedToGroup)) {
 188             return it.key()->index();
 189         }
 190     }
 191     return -1;
 192 }
 193
 194 void KItemListController::setAutoActivationDelay(int delay)
 195 {
 196     m_autoActivationTimer->setInterval(delay);
 197 }
 198
 199 int KItemListController::autoActivationDelay() const
 200 {
 201     return m_autoActivationTimer->interval();
 202 }
 203
 204 void KItemListController::setSingleClickActivationEnforced(bool singleClick)
 205 {
 206     m_singleClickActivationEnforced = singleClick;
 207 }
 208
 209 bool KItemListController::singleClickActivationEnforced() const
 210 {
 211     return m_singleClickActivationEnforced;
 212 }
 213
 214 bool KItemListController::keyPressEvent(QKeyEvent* event)
 215 {
 216     int index = m_selectionManager->currentItem();
 217     int key = event->key();
 218
 219     // Handle the expanding/collapsing of items
 220     if (m_view->supportsItemExpanding() && m_model->isExpandable(index)) {
 221         if (key == Qt::Key_Right) {
 222             if (m_model->setExpanded(index, true)) {
 223                 return true;
 224             }
 225         } else if (key == Qt::Key_Left) {
 226             if (m_model->setExpanded(index, false)) {
 227                 return true;
 228             }
 229         }
 230     }
 231
 232     const bool shiftPressed = event->modifiers() & Qt::ShiftModifier;
 233     const bool controlPressed = event->modifiers() & Qt::ControlModifier;
 234     const bool shiftOrControlPressed = shiftPressed || controlPressed;
 235     const bool navigationPressed = key == Qt::Key_Home || key == Qt::Key_End  ||
 236                                    key == Qt::Key_PageUp || key == Qt::Key_PageDown ||
 237                                    key == Qt::Key_Up || key == Qt::Key_Down ||
 238                                    key == Qt::Key_Left || key == Qt::Key_Right;
 239
 240     const int itemCount = m_model->count();
 241
 242     // For horizontal scroll orientation, transform
 243     // the arrow keys to simplify the event handling.
 244     if (m_view->scrollOrientation() == Qt::Horizontal) {
 245         switch (key) {
 246         case Qt::Key_Up:    key = Qt::Key_Left; break;
 247         case Qt::Key_Down:  key = Qt::Key_Right; break;
 248         case Qt::Key_Left:  key = Qt::Key_Up; break;
 249         case Qt::Key_Right: key = Qt::Key_Down; break;
 250         default:            break;
 251         }
 252     }
 253
 254     const bool selectSingleItem = m_selectionBehavior != NoSelection && itemCount == 1 && navigationPressed;
 255
 256     if (selectSingleItem) {
 257         const int current = m_selectionManager->currentItem();
 258         m_selectionManager->setSelected(current);
 259         return true;
 260     }
 261
 262     switch (key) {
 263     case Qt::Key_Home:
 264         index = 0;
 265         m_keyboardAnchorIndex = index;
 266         m_keyboardAnchorPos = keyboardAnchorPos(index);
 267         break;
 268
 269     case Qt::Key_End:
 270         index = itemCount - 1;
 271         m_keyboardAnchorIndex = index;
 272         m_keyboardAnchorPos = keyboardAnchorPos(index);
 273         break;
 274
 275     case Qt::Key_Left:
 276         if (index > 0) {
 277             const int expandedParentsCount = m_model->expandedParentsCount(index);
 278             if (expandedParentsCount == 0) {
 279                 --index;
 280             } else {
 281                 // Go to the parent of the current item.
 282                 do {
 283                     --index;
 284                 } while (index > 0 && m_model->expandedParentsCount(index) == expandedParentsCount);
 285             }
 286             m_keyboardAnchorIndex = index;
 287             m_keyboardAnchorPos = keyboardAnchorPos(index);
 288         }
 289         break;
 290
 291     case Qt::Key_Right:
 292         if (index < itemCount - 1) {
 293             ++index;
 294             m_keyboardAnchorIndex = index;
 295             m_keyboardAnchorPos = keyboardAnchorPos(index);
 296         }
 297         break;
 298
 299     case Qt::Key_Up:
 300         updateKeyboardAnchor();
 301         index = previousRowIndex(index);
 302         break;
 303
 304     case Qt::Key_Down:
 305         updateKeyboardAnchor();
 306         index = nextRowIndex(index);
 307         break;
 308
 309     case Qt::Key_PageUp:
 310         if (m_view->scrollOrientation() == Qt::Horizontal) {
 311             // The new current index should correspond to the first item in the current column.
 312             int newIndex = qMax(index - 1, 0);
 313             while (newIndex != index && m_view->itemRect(newIndex).topLeft().y() < m_view->itemRect(index).topLeft().y()) {
 314                 index = newIndex;
 315                 newIndex = qMax(index - 1, 0);
 316             }
 317             m_keyboardAnchorIndex = index;
 318             m_keyboardAnchorPos = keyboardAnchorPos(index);
 319         } else {
 320             const qreal currentItemBottom = m_view->itemRect(index).bottomLeft().y();
 321             const qreal height = m_view->geometry().height();
 322
 323             // The new current item should be the first item in the current
 324             // column whose itemRect's top coordinate is larger than targetY.
 325             const qreal targetY = currentItemBottom - height;
 326
 327             updateKeyboardAnchor();
 328             int newIndex = previousRowIndex(index);
 329             do {
 330                 index = newIndex;
 331                 updateKeyboardAnchor();
 332                 newIndex = previousRowIndex(index);
 333             } while (m_view->itemRect(newIndex).topLeft().y() > targetY && newIndex != index);
 334         }
 335         break;
 336
 337     case Qt::Key_PageDown:
 338         if (m_view->scrollOrientation() == Qt::Horizontal) {
 339             // The new current index should correspond to the last item in the current column.
 340             int newIndex = qMin(index + 1, m_model->count() - 1);
 341             while (newIndex != index && m_view->itemRect(newIndex).topLeft().y() > m_view->itemRect(index).topLeft().y()) {
 342                 index = newIndex;
 343                 newIndex = qMin(index + 1, m_model->count() - 1);
 344             }
 345             m_keyboardAnchorIndex = index;
 346             m_keyboardAnchorPos = keyboardAnchorPos(index);
 347         } else {
 348             const qreal currentItemTop = m_view->itemRect(index).topLeft().y();
 349             const qreal height = m_view->geometry().height();
 350
 351             // The new current item should be the last item in the current
 352             // column whose itemRect's bottom coordinate is smaller than targetY.
 353             const qreal targetY = currentItemTop + height;
 354
 355             updateKeyboardAnchor();
 356             int newIndex = nextRowIndex(index);
 357             do {
 358                 index = newIndex;
 359                 updateKeyboardAnchor();
 360                 newIndex = nextRowIndex(index);
 361             } while (m_view->itemRect(newIndex).bottomLeft().y() < targetY && newIndex != index);
 362         }
 363         break;
 364
 365     case Qt::Key_Enter:
 366     case Qt::Key_Return: {
 367         const KItemSet selectedItems = m_selectionManager->selectedItems();
 368         if (selectedItems.count() >= 2) {
 369             emit itemsActivated(selectedItems);
 370         } else if (selectedItems.count() == 1) {
 371             emit itemActivated(selectedItems.first());
 372         } else {
 373             emit itemActivated(index);
 374         }
 375         break;
 376     }
 377
 378     case Qt::Key_Menu: {
 379         // Emit the signal itemContextMenuRequested() in case if at least one
 380         // item is selected. Otherwise the signal viewContextMenuRequested() will be emitted.
 381         const KItemSet selectedItems = m_selectionManager->selectedItems();
 382         int index = -1;
 383         if (selectedItems.count() >= 2) {
 384             const int currentItemIndex = m_selectionManager->currentItem();
 385             index = selectedItems.contains(currentItemIndex)
 386                     ? currentItemIndex : selectedItems.first();
 387         } else if (selectedItems.count() == 1) {
 388             index = selectedItems.first();
 389         }
 390
 391         if (index >= 0) {
 392             const QRectF contextRect = m_view->itemContextRect(index);
 393             const QPointF pos(m_view->scene()->views().first()->mapToGlobal(contextRect.bottomRight().toPoint()));
 394             emit itemContextMenuRequested(index, pos);
 395         } else {
 396             emit viewContextMenuRequested(QCursor::pos());
 397         }
 398         break;
 399     }
 400
 401     case Qt::Key_Escape:
 402         if (m_selectionBehavior != SingleSelection) {
 403             m_selectionManager->clearSelection();
 404         }
 405         m_keyboardManager->cancelSearch();
 406         emit escapePressed();
 407         break;
 408
 409     case Qt::Key_Space:
 410         if (m_selectionBehavior == MultiSelection) {
 411             if (controlPressed) {
 412                 // Toggle the selection state of the current item.
 413                 m_selectionManager->endAnchoredSelection();
 414                 m_selectionManager->setSelected(index, 1, KItemListSelectionManager::Toggle);
 415                 m_selectionManager->beginAnchoredSelection(index);
 416                 break;
 417             } else {
 418                 // Select the current item if it is not selected yet.
 419                 const int current = m_selectionManager->currentItem();
 420                 if (!m_selectionManager->isSelected(current)) {
 421                     m_selectionManager->setSelected(current);
 422                     break;
 423                 }
 424             }
 425         }
 426         Q_FALLTHROUGH();  // fall through to the default case and add the Space to the current search string.
 427     default:
 428         m_keyboardManager->addKeys(event->text());
 429         // Make sure unconsumed events get propagated up the chain. #302329
 430         event->ignore();
 431         return false;
 432     }
 433
 434     if (m_selectionManager->currentItem() != index) {
 435         switch (m_selectionBehavior) {
 436         case NoSelection:
 437             m_selectionManager->setCurrentItem(index);
 438             break;
 439
 440         case SingleSelection:
 441             m_selectionManager->setCurrentItem(index);
 442             m_selectionManager->clearSelection();
 443             m_selectionManager->setSelected(index, 1);
 444             break;
 445
 446         case MultiSelection:
 447             if (controlPressed) {
 448                 m_selectionManager->endAnchoredSelection();
 449             }
 450
 451             m_selectionManager->setCurrentItem(index);
 452
 453             if (!shiftOrControlPressed) {
 454                 m_selectionManager->clearSelection();
 455                 m_selectionManager->setSelected(index, 1);
 456             }
 457
 458             if (!shiftPressed) {
 459                 m_selectionManager->beginAnchoredSelection(index);
 460             }
 461             break;
 462         }
 463     }
 464
 465     if (navigationPressed) {
 466         m_view->scrollToItem(index);
 467     }
 468     return true;
 469 }
 470
 471 void KItemListController::slotChangeCurrentItem(const QString& text, bool searchFromNextItem)
 472 {
 473     if (!m_model || m_model->count() == 0) {
 474         return;
 475     }
 476     int index;
 477     if (searchFromNextItem) {
 478         const int currentIndex = m_selectionManager->currentItem();
 479         index = m_model->indexForKeyboardSearch(text, (currentIndex + 1) % m_model->count());
 480     } else {
 481         index = m_model->indexForKeyboardSearch(text, 0);
 482     }
 483     if (index >= 0) {
 484         m_selectionManager->setCurrentItem(index);
 485
 486         if (m_selectionBehavior != NoSelection) {
 487             m_selectionManager->replaceSelection(index);
 488             m_selectionManager->beginAnchoredSelection(index);
 489         }
 490
 491         m_view->scrollToItem(index);
 492     }
 493 }
 494
 495 void KItemListController::slotAutoActivationTimeout()
 496 {
 497     if (!m_model || !m_view) {
 498         return;
 499     }
 500
 501     const int index = m_autoActivationTimer->property("index").toInt();
 502     if (index < 0 || index >= m_model->count()) {
 503         return;
 504     }
 505
 506     /* m_view->isUnderMouse() fixes a bug in the Folder-View-Panel and in the
 507      * Places-Panel.
 508      *
 509      * Bug: When you drag a file onto a Folder-View-Item or a Places-Item and
 510      * then move away before the auto-activation timeout triggers, than the
 511      * item still becomes activated/expanded.
 512      *
 513      * See Bug 293200 and 305783
 514      */
 515     if (m_model->supportsDropping(index) && m_view->isUnderMouse()) {
 516         if (m_view->supportsItemExpanding() && m_model->isExpandable(index)) {
 517             const bool expanded = m_model->isExpanded(index);
 518             m_model->setExpanded(index, !expanded);
 519         } else if (m_autoActivationBehavior != ExpansionOnly) {
 520             emit itemActivated(index);
 521         }
 522     }
 523 }
 524
 525 bool KItemListController::inputMethodEvent(QInputMethodEvent* event)
 526 {
 527     Q_UNUSED(event)
 528     return false;
 529 }
 530
 531 bool KItemListController::mousePressEvent(QGraphicsSceneMouseEvent* event, const QTransform& transform)
 532 {
 533     if (!m_view) {
 534         return false;
 535     }
 536
 537     m_pressedMousePos = transform.map(event->pos());
 538     m_pressedIndex = m_view->itemAt(m_pressedMousePos);
 539     emit mouseButtonPressed(m_pressedIndex, event->buttons());
 540
 541     if (event->buttons() & (Qt::BackButton | Qt::ForwardButton)) {
 542         // Do not select items when clicking the back/forward buttons, see
 543         // https://bugs.kde.org/show_bug.cgi?id=327412.
 544         return true;
 545     }
 546
 547     if (m_view->isAboveExpansionToggle(m_pressedIndex, m_pressedMousePos)) {
 548         m_selectionManager->endAnchoredSelection();
 549         m_selectionManager->setCurrentItem(m_pressedIndex);
 550         m_selectionManager->beginAnchoredSelection(m_pressedIndex);
 551         return true;
 552     }
 553
 554     m_selectionTogglePressed = m_view->isAboveSelectionToggle(m_pressedIndex, m_pressedMousePos);
 555     if (m_selectionTogglePressed) {
 556         m_selectionManager->setSelected(m_pressedIndex, 1, KItemListSelectionManager::Toggle);
 557         // The previous anchored selection has been finished already in
 558         // KItemListSelectionManager::setSelected(). We can safely change
 559         // the current item and start a new anchored selection now.
 560         m_selectionManager->setCurrentItem(m_pressedIndex);
 561         m_selectionManager->beginAnchoredSelection(m_pressedIndex);
 562         return true;
 563     }
 564
 565     const bool shiftPressed = event->modifiers() & Qt::ShiftModifier;
 566     const bool controlPressed = event->modifiers() & Qt::ControlModifier;
 567
 568     // The previous selection is cleared if either
 569     // 1. The selection mode is SingleSelection, or
 570     // 2. the selection mode is MultiSelection, and *none* of the following conditions are met:
 571     //    a) Shift or Control are pressed.
 572     //    b) The clicked item is selected already. In that case, the user might want to:
 573     //       - start dragging multiple items, or
 574     //       - open the context menu and perform an action for all selected items.
 575     const bool shiftOrControlPressed = shiftPressed || controlPressed;
 576     const bool pressedItemAlreadySelected = m_pressedIndex >= 0 && m_selectionManager->isSelected(m_pressedIndex);
 577     const bool clearSelection = m_selectionBehavior == SingleSelection ||
 578                                 (!shiftOrControlPressed && !pressedItemAlreadySelected);
 579     if (clearSelection) {
 580         m_selectionManager->clearSelection();
 581     } else if (pressedItemAlreadySelected && !shiftOrControlPressed && (event->buttons() & Qt::LeftButton)) {
 582         // The user might want to start dragging multiple items, but if he clicks the item
 583         // in order to trigger it instead, the other selected items must be deselected.
 584         // However, we do not know yet what the user is going to do.
 585         // -> remember that the user pressed an item which had been selected already and
 586         //    clear the selection in mouseReleaseEvent(), unless the items are dragged.
 587         m_clearSelectionIfItemsAreNotDragged = true;
 588
 589         if (m_selectionManager->selectedItems().count() == 1 && m_view->isAboveText(m_pressedIndex, m_pressedMousePos)) {
 590             emit selectedItemTextPressed(m_pressedIndex);
 591         }
 592     }
 593
 594     if (!shiftPressed) {
 595         // Finish the anchored selection before the current index is changed
 596         m_selectionManager->endAnchoredSelection();
 597     }
 598
 599     if (event->buttons() & Qt::RightButton) {
 600         // Stop rubber band from persisting after right-clicks
 601         KItemListRubberBand* rubberBand = m_view->rubberBand();
 602         if (rubberBand->isActive()) {
 603             disconnect(rubberBand, &KItemListRubberBand::endPositionChanged, this, &KItemListController::slotRubberBandChanged);
 604             rubberBand->setActive(false);
 605             m_view->setAutoScroll(false);
 606         }
 607     }
 608
 609     if (m_pressedIndex >= 0) {
 610         m_selectionManager->setCurrentItem(m_pressedIndex);
 611
 612         switch (m_selectionBehavior) {
 613         case NoSelection:
 614             break;
 615
 616         case SingleSelection:
 617             m_selectionManager->setSelected(m_pressedIndex);
 618             break;
 619
 620         case MultiSelection:
 621             if (controlPressed && !shiftPressed) {
 622                 m_selectionManager->setSelected(m_pressedIndex, 1, KItemListSelectionManager::Toggle);
 623                 m_selectionManager->beginAnchoredSelection(m_pressedIndex);
 624             } else if (!shiftPressed || !m_selectionManager->isAnchoredSelectionActive()) {
 625                 // Select the pressed item and start a new anchored selection
 626                 m_selectionManager->setSelected(m_pressedIndex, 1, KItemListSelectionManager::Select);
 627                 m_selectionManager->beginAnchoredSelection(m_pressedIndex);
 628             }
 629             break;
 630
 631         default:
 632             Q_ASSERT(false);
 633             break;
 634         }
 635
 636         if (event->buttons() & Qt::RightButton) {
 637             emit itemContextMenuRequested(m_pressedIndex, event->screenPos());
 638         }
 639
 640         return true;
 641     }
 642
 643     if (event->buttons() & Qt::RightButton) {
 644         const QRectF headerBounds = m_view->headerBoundaries();
 645         if (headerBounds.contains(event->pos())) {
 646             emit headerContextMenuRequested(event->screenPos());
 647         } else {
 648             emit viewContextMenuRequested(event->screenPos());
 649         }
 650         return true;
 651     }
 652
 653     if (m_selectionBehavior == MultiSelection) {
 654         QPointF startPos = m_pressedMousePos;
 655         if (m_view->scrollOrientation() == Qt::Vertical) {
 656             startPos.ry() += m_view->scrollOffset();
 657             if (m_view->itemSize().width() < 0) {
 658                 // Use a special rubberband for views that have only one column and
 659                 // expand the rubberband to use the whole width of the view.
 660                 startPos.setX(0);
 661             }
 662         } else {
 663             startPos.rx() += m_view->scrollOffset();
 664         }
 665
 666         m_oldSelection = m_selectionManager->selectedItems();
 667         KItemListRubberBand* rubberBand = m_view->rubberBand();
 668         rubberBand->setStartPosition(startPos);
 669         rubberBand->setEndPosition(startPos);
 670         rubberBand->setActive(true);
 671         connect(rubberBand, &KItemListRubberBand::endPositionChanged, this, &KItemListController::slotRubberBandChanged);
 672         m_view->setAutoScroll(true);
 673     }
 674
 675     return false;
 676 }
 677
 678 bool KItemListController::mouseMoveEvent(QGraphicsSceneMouseEvent* event, const QTransform& transform)
 679 {
 680     if (!m_view) {
 681         return false;
 682     }
 683
 684     if (m_pressedIndex >= 0) {
 685         // Check whether a dragging should be started
 686         if (event->buttons() & Qt::LeftButton) {
 687             const QPointF pos = transform.map(event->pos());
 688             if ((pos - m_pressedMousePos).manhattanLength() >= QApplication::startDragDistance()) {
 689                 if (!m_selectionManager->isSelected(m_pressedIndex)) {
 690                     // Always assure that the dragged item gets selected. Usually this is already
 691                     // done on the mouse-press event, but when using the selection-toggle on a
 692                     // selected item the dragged item is not selected yet.
 693                     m_selectionManager->setSelected(m_pressedIndex, 1, KItemListSelectionManager::Toggle);
 694                 } else {
 695                     // A selected item has been clicked to drag all selected items
 696                     // -> the selection should not be cleared when the mouse button is released.
 697                     m_clearSelectionIfItemsAreNotDragged = false;
 698                 }
 699
 700                 startDragging();
 701             }
 702         }
 703     } else {
 704         KItemListRubberBand* rubberBand = m_view->rubberBand();
 705         if (rubberBand->isActive()) {
 706             QPointF endPos = transform.map(event->pos());
 707
 708             // Update the current item.
 709             const int newCurrent = m_view->itemAt(endPos);
 710             if (newCurrent >= 0) {
 711                 // It's expected that the new current index is also the new anchor (bug 163451).
 712                 m_selectionManager->endAnchoredSelection();
 713                 m_selectionManager->setCurrentItem(newCurrent);
 714                 m_selectionManager->beginAnchoredSelection(newCurrent);
 715             }
 716
 717             if (m_view->scrollOrientation() == Qt::Vertical) {
 718                 endPos.ry() += m_view->scrollOffset();
 719                 if (m_view->itemSize().width() < 0) {
 720                     // Use a special rubberband for views that have only one column and
 721                     // expand the rubberband to use the whole width of the view.
 722                     endPos.setX(m_view->size().width());
 723                 }
 724             } else {
 725                 endPos.rx() += m_view->scrollOffset();
 726             }
 727             rubberBand->setEndPosition(endPos);
 728         }
 729     }
 730
 731     return false;
 732 }
 733
 734 bool KItemListController::mouseReleaseEvent(QGraphicsSceneMouseEvent* event, const QTransform& transform)
 735 {
 736     if (!m_view) {
 737         return false;
 738     }
 739
 740     emit mouseButtonReleased(m_pressedIndex, event->buttons());
 741
 742     const bool isAboveSelectionToggle = m_view->isAboveSelectionToggle(m_pressedIndex, m_pressedMousePos);
 743     if (isAboveSelectionToggle) {
 744         m_selectionTogglePressed = false;
 745         return true;
 746     }
 747
 748     if (!isAboveSelectionToggle && m_selectionTogglePressed) {
 749         m_selectionManager->setSelected(m_pressedIndex, 1, KItemListSelectionManager::Toggle);
 750         m_selectionTogglePressed = false;
 751         return true;
 752     }
 753
 754     const bool shiftOrControlPressed = event->modifiers() & Qt::ShiftModifier ||
 755                                        event->modifiers() & Qt::ControlModifier;
 756
 757     KItemListRubberBand* rubberBand = m_view->rubberBand();
 758     if (rubberBand->isActive()) {
 759         disconnect(rubberBand, &KItemListRubberBand::endPositionChanged, this, &KItemListController::slotRubberBandChanged);
 760         rubberBand->setActive(false);
 761         m_oldSelection.clear();
 762         m_view->setAutoScroll(false);
 763     }
 764
 765     const QPointF pos = transform.map(event->pos());
 766     const int index = m_view->itemAt(pos);
 767
 768     if (index >= 0 && index == m_pressedIndex) {
 769         // The release event is done above the same item as the press event
 770
 771         if (m_clearSelectionIfItemsAreNotDragged) {
 772             // A selected item has been clicked, but no drag operation has been started
 773             // -> clear the rest of the selection.
 774             m_selectionManager->clearSelection();
 775             m_selectionManager->setSelected(m_pressedIndex, 1, KItemListSelectionManager::Select);
 776             m_selectionManager->beginAnchoredSelection(m_pressedIndex);
 777         }
 778
 779         if (event->button() & Qt::LeftButton) {
 780             bool emitItemActivated = true;
 781             if (m_view->isAboveExpansionToggle(index, pos)) {
 782                 const bool expanded = m_model->isExpanded(index);
 783                 m_model->setExpanded(index, !expanded);
 784
 785                 emit itemExpansionToggleClicked(index);
 786                 emitItemActivated = false;
 787             } else if (shiftOrControlPressed) {
 788                 // The mouse click should only update the selection, not trigger the item
 789                 emitItemActivated = false;
 790             } else if (!(m_view->style()->styleHint(QStyle::SH_ItemView_ActivateItemOnSingleClick) || m_singleClickActivationEnforced)) {
 791                 emitItemActivated = false;
 792             }
 793             if (emitItemActivated) {
 794                 emit itemActivated(index);
 795             }
 796         } else if (event->button() & Qt::MidButton) {
 797             emit itemMiddleClicked(index);
 798         }
 799     }
 800
 801     m_pressedMousePos = QPointF();
 802     m_pressedIndex = -1;
 803     m_clearSelectionIfItemsAreNotDragged = false;
 804     return false;
 805 }
 806
 807 bool KItemListController::mouseDoubleClickEvent(QGraphicsSceneMouseEvent* event, const QTransform& transform)
 808 {
 809     const QPointF pos = transform.map(event->pos());
 810     const int index = m_view->itemAt(pos);
 811
 812     // Expand item if desired - See Bug 295573
 813     if (m_mouseDoubleClickAction != ActivateItemOnly) {
 814         if (m_view && m_model && m_view->supportsItemExpanding() && m_model->isExpandable(index)) {
 815             const bool expanded = m_model->isExpanded(index);
 816             m_model->setExpanded(index, !expanded);
 817         }
 818     }
 819
 820     if (event->button() & Qt::RightButton) {
 821         m_selectionManager->clearSelection();
 822         if (index >= 0) {
 823             m_selectionManager->setSelected(index);
 824             emit itemContextMenuRequested(index, event->screenPos());
 825         } else {
 826             const QRectF headerBounds = m_view->headerBoundaries();
 827             if (headerBounds.contains(event->pos())) {
 828                 emit headerContextMenuRequested(event->screenPos());
 829             } else {
 830                 emit viewContextMenuRequested(event->screenPos());
 831             }
 832         }
 833         return true;
 834     }
 835
 836     bool emitItemActivated = !(m_view->style()->styleHint(QStyle::SH_ItemView_ActivateItemOnSingleClick) || m_singleClickActivationEnforced) &&
 837                              (event->button() & Qt::LeftButton) &&
 838                              index >= 0 && index < m_model->count();
 839     if (emitItemActivated) {
 840         emit itemActivated(index);
 841     }
 842     return false;
 843 }
 844
 845 bool KItemListController::dragEnterEvent(QGraphicsSceneDragDropEvent* event, const QTransform& transform)
 846 {
 847     Q_UNUSED(event)
 848     Q_UNUSED(transform)
 849
 850     DragAndDropHelper::clearUrlListMatchesUrlCache();
 851
 852     return false;
 853 }
 854
 855 bool KItemListController::dragLeaveEvent(QGraphicsSceneDragDropEvent* event, const QTransform& transform)
 856 {
 857     Q_UNUSED(event)
 858     Q_UNUSED(transform)
 859
 860     m_autoActivationTimer->stop();
 861     m_view->setAutoScroll(false);
 862     m_view->hideDropIndicator();
 863
 864     KItemListWidget* widget = hoveredWidget();
 865     if (widget) {
 866         widget->setHovered(false);
 867         emit itemUnhovered(widget->index());
 868     }
 869     return false;
 870 }
 871
 872 bool KItemListController::dragMoveEvent(QGraphicsSceneDragDropEvent* event, const QTransform& transform)
 873 {
 874     if (!m_model || !m_view) {
 875         return false;
 876     }
 877
 878
 879     QUrl hoveredDir = m_model->directory();
 880     KItemListWidget* oldHoveredWidget = hoveredWidget();
 881
 882     const QPointF pos = transform.map(event->pos());
 883     KItemListWidget* newHoveredWidget = widgetForPos(pos);
 884
 885     if (oldHoveredWidget != newHoveredWidget) {
 886         m_autoActivationTimer->stop();
 887
 888         if (oldHoveredWidget) {
 889             oldHoveredWidget->setHovered(false);
 890             emit itemUnhovered(oldHoveredWidget->index());
 891         }
 892     }
 893
 894     if (newHoveredWidget) {
 895         bool droppingBetweenItems = false;
 896         if (m_model->sortRole().isEmpty()) {
 897             // The model supports inserting items between other items.
 898             droppingBetweenItems = (m_view->showDropIndicator(pos) >= 0);
 899         }
 900
 901         const int index = newHoveredWidget->index();
 902
 903         if (m_model->isDir(index)) {
 904             hoveredDir = m_model->url(index);
 905         }
 906
 907         if (!droppingBetweenItems) {
 908             if (m_model->supportsDropping(index)) {
 909                 // Something has been dragged on an item.
 910                 m_view->hideDropIndicator();
 911                 if (!newHoveredWidget->isHovered()) {
 912                     newHoveredWidget->setHovered(true);
 913                     emit itemHovered(index);
 914                 }
 915
 916                 if (!m_autoActivationTimer->isActive() && m_autoActivationTimer->interval() >= 0) {
 917                     m_autoActivationTimer->setProperty("index", index);
 918                     m_autoActivationTimer->start();
 919                 }
 920             }
 921         } else {
 922             m_autoActivationTimer->stop();
 923             if (newHoveredWidget && newHoveredWidget->isHovered()) {
 924                 newHoveredWidget->setHovered(false);
 925                 emit itemUnhovered(index);
 926             }
 927         }
 928     } else {
 929         m_view->hideDropIndicator();
 930     }
 931
 932     if (DragAndDropHelper::urlListMatchesUrl(event->mimeData()->urls(), hoveredDir)) {
 933         event->setDropAction(Qt::IgnoreAction);
 934         event->ignore();
 935     } else {
 936         event->setDropAction(event->proposedAction());
 937         event->accept();
 938     }
 939     return false;
 940 }
 941
 942 bool KItemListController::dropEvent(QGraphicsSceneDragDropEvent* event, const QTransform& transform)
 943 {
 944     if (!m_view) {
 945         return false;
 946     }
 947
 948     m_autoActivationTimer->stop();
 949     m_view->setAutoScroll(false);
 950
 951     const QPointF pos = transform.map(event->pos());
 952
 953     int dropAboveIndex = -1;
 954     if (m_model->sortRole().isEmpty()) {
 955         // The model supports inserting of items between other items.
 956         dropAboveIndex = m_view->showDropIndicator(pos);
 957     }
 958
 959     if (dropAboveIndex >= 0) {
 960         // Something has been dropped between two items.
 961         m_view->hideDropIndicator();
 962         emit aboveItemDropEvent(dropAboveIndex, event);
 963     } else if (!event->mimeData()->hasFormat(m_model->blacklistItemDropEventMimeType())) {
 964         // Something has been dropped on an item or on an empty part of the view.
 965         emit itemDropEvent(m_view->itemAt(pos), event);
 966     }
 967
 968     QAccessibleEvent accessibilityEvent(view(), QAccessible::DragDropEnd);
 969     QAccessible::updateAccessibility(&accessibilityEvent);
 970
 971     return true;
 972 }
 973
 974 bool KItemListController::hoverEnterEvent(QGraphicsSceneHoverEvent* event, const QTransform& transform)
 975 {
 976     Q_UNUSED(event)
 977     Q_UNUSED(transform)
 978     return false;
 979 }
 980
 981 bool KItemListController::hoverMoveEvent(QGraphicsSceneHoverEvent* event, const QTransform& transform)
 982 {
 983     Q_UNUSED(transform)
 984     if (!m_model || !m_view) {
 985         return false;
 986     }
 987
 988     KItemListWidget* oldHoveredWidget = hoveredWidget();
 989     const QPointF pos = transform.map(event->pos());
 990     KItemListWidget* newHoveredWidget = widgetForPos(pos);
 991
 992     if (oldHoveredWidget != newHoveredWidget) {
 993         if (oldHoveredWidget) {
 994             oldHoveredWidget->setHovered(false);
 995             emit itemUnhovered(oldHoveredWidget->index());
 996         }
 997
 998         if (newHoveredWidget) {
 999             newHoveredWidget->setHovered(true);
1000             const QPointF mappedPos = newHoveredWidget->mapFromItem(m_view, pos);
1001             newHoveredWidget->setHoverPosition(mappedPos);
1002             emit itemHovered(newHoveredWidget->index());
1003         }
1004     } else if (oldHoveredWidget) {
1005         const QPointF mappedPos = oldHoveredWidget->mapFromItem(m_view, pos);
1006         oldHoveredWidget->setHoverPosition(mappedPos);
1007     }
1008
1009     return false;
1010 }
1011
1012 bool KItemListController::hoverLeaveEvent(QGraphicsSceneHoverEvent* event, const QTransform& transform)
1013 {
1014     Q_UNUSED(event)
1015     Q_UNUSED(transform)
1016
1017     if (!m_model || !m_view) {
1018         return false;
1019     }
1020
1021     foreach (KItemListWidget* widget, m_view->visibleItemListWidgets()) {
1022         if (widget->isHovered()) {
1023             widget->setHovered(false);
1024             emit itemUnhovered(widget->index());
1025         }
1026     }
1027     return false;
1028 }
1029
1030 bool KItemListController::wheelEvent(QGraphicsSceneWheelEvent* event, const QTransform& transform)
1031 {
1032     Q_UNUSED(event)
1033     Q_UNUSED(transform)
1034     return false;
1035 }
1036
1037 bool KItemListController::resizeEvent(QGraphicsSceneResizeEvent* event, const QTransform& transform)
1038 {
1039     Q_UNUSED(event)
1040     Q_UNUSED(transform)
1041     return false;
1042 }
1043
1044 bool KItemListController::processEvent(QEvent* event, const QTransform& transform)
1045 {
1046     if (!event) {
1047         return false;
1048     }
1049
1050     switch (event->type()) {
1051     case QEvent::KeyPress:
1052         return keyPressEvent(static_cast<QKeyEvent*>(event));
1053     case QEvent::InputMethod:
1054         return inputMethodEvent(static_cast<QInputMethodEvent*>(event));
1055     case QEvent::GraphicsSceneMousePress:
1056         return mousePressEvent(static_cast<QGraphicsSceneMouseEvent*>(event), QTransform());
1057     case QEvent::GraphicsSceneMouseMove:
1058         return mouseMoveEvent(static_cast<QGraphicsSceneMouseEvent*>(event), QTransform());
1059     case QEvent::GraphicsSceneMouseRelease:
1060         return mouseReleaseEvent(static_cast<QGraphicsSceneMouseEvent*>(event), QTransform());
1061     case QEvent::GraphicsSceneMouseDoubleClick:
1062         return mouseDoubleClickEvent(static_cast<QGraphicsSceneMouseEvent*>(event), QTransform());
1063     case QEvent::GraphicsSceneWheel:
1064          return wheelEvent(static_cast<QGraphicsSceneWheelEvent*>(event), QTransform());
1065     case QEvent::GraphicsSceneDragEnter:
1066         return dragEnterEvent(static_cast<QGraphicsSceneDragDropEvent*>(event), QTransform());
1067     case QEvent::GraphicsSceneDragLeave:
1068         return dragLeaveEvent(static_cast<QGraphicsSceneDragDropEvent*>(event), QTransform());
1069     case QEvent::GraphicsSceneDragMove:
1070         return dragMoveEvent(static_cast<QGraphicsSceneDragDropEvent*>(event), QTransform());
1071     case QEvent::GraphicsSceneDrop:
1072         return dropEvent(static_cast<QGraphicsSceneDragDropEvent*>(event), QTransform());
1073     case QEvent::GraphicsSceneHoverEnter:
1074         return hoverEnterEvent(static_cast<QGraphicsSceneHoverEvent*>(event), QTransform());
1075     case QEvent::GraphicsSceneHoverMove:
1076         return hoverMoveEvent(static_cast<QGraphicsSceneHoverEvent*>(event), QTransform());
1077     case QEvent::GraphicsSceneHoverLeave:
1078         return hoverLeaveEvent(static_cast<QGraphicsSceneHoverEvent*>(event), QTransform());
1079     case QEvent::GraphicsSceneResize:
1080         return resizeEvent(static_cast<QGraphicsSceneResizeEvent*>(event), transform);
1081     default:
1082         break;
1083     }
1084
1085     return false;
1086 }
1087
1088 void KItemListController::slotViewScrollOffsetChanged(qreal current, qreal previous)
1089 {
1090     if (!m_view) {
1091         return;
1092     }
1093
1094     KItemListRubberBand* rubberBand = m_view->rubberBand();
1095     if (rubberBand->isActive()) {
1096         const qreal diff = current - previous;
1097         // TODO: Ideally just QCursor::pos() should be used as
1098         // new end-position but it seems there is no easy way
1099         // to have something like QWidget::mapFromGlobal() for QGraphicsWidget
1100         // (... or I just missed an easy way to do the mapping)
1101         QPointF endPos = rubberBand->endPosition();
1102         if (m_view->scrollOrientation() == Qt::Vertical) {
1103             endPos.ry() += diff;
1104         } else {
1105             endPos.rx() += diff;
1106         }
1107
1108         rubberBand->setEndPosition(endPos);
1109     }
1110 }
1111
1112 void KItemListController::slotRubberBandChanged()
1113 {
1114     if (!m_view || !m_model || m_model->count() <= 0) {
1115         return;
1116     }
1117
1118     const KItemListRubberBand* rubberBand = m_view->rubberBand();
1119     const QPointF startPos = rubberBand->startPosition();
1120     const QPointF endPos = rubberBand->endPosition();
1121     QRectF rubberBandRect = QRectF(startPos, endPos).normalized();
1122
1123     const bool scrollVertical = (m_view->scrollOrientation() == Qt::Vertical);
1124     if (scrollVertical) {
1125         rubberBandRect.translate(0, -m_view->scrollOffset());
1126     } else {
1127         rubberBandRect.translate(-m_view->scrollOffset(), 0);
1128     }
1129
1130     if (!m_oldSelection.isEmpty()) {
1131         // Clear the old selection that was available before the rubberband has
1132         // been activated in case if no Shift- or Control-key are pressed
1133         const bool shiftOrControlPressed = QApplication::keyboardModifiers() & Qt::ShiftModifier ||
1134                                            QApplication::keyboardModifiers() & Qt::ControlModifier;
1135         if (!shiftOrControlPressed) {
1136             m_oldSelection.clear();
1137         }
1138     }
1139
1140     KItemSet selectedItems;
1141
1142     // Select all visible items that intersect with the rubberband
1143     foreach (const KItemListWidget* widget, m_view->visibleItemListWidgets()) {
1144         const int index = widget->index();
1145
1146         const QRectF widgetRect = m_view->itemRect(index);
1147         if (widgetRect.intersects(rubberBandRect)) {
1148             const QRectF iconRect = widget->iconRect().translated(widgetRect.topLeft());
1149             const QRectF textRect = widget->textRect().translated(widgetRect.topLeft());
1150             if (iconRect.intersects(rubberBandRect) || textRect.intersects(rubberBandRect)) {
1151                 selectedItems.insert(index);
1152             }
1153         }
1154     }
1155
1156     // Select all invisible items that intersect with the rubberband. Instead of
1157     // iterating all items only the area which might be touched by the rubberband
1158     // will be checked.
1159     const bool increaseIndex = scrollVertical ?
1160                                startPos.y() > endPos.y(): startPos.x() > endPos.x();
1161
1162     int index = increaseIndex ? m_view->lastVisibleIndex() + 1 : m_view->firstVisibleIndex() - 1;
1163     bool selectionFinished = false;
1164     do {
1165         const QRectF widgetRect = m_view->itemRect(index);
1166         if (widgetRect.intersects(rubberBandRect)) {
1167             selectedItems.insert(index);
1168         }
1169
1170         if (increaseIndex) {
1171             ++index;
1172             selectionFinished = (index >= m_model->count()) ||
1173                                 ( scrollVertical && widgetRect.top()  > rubberBandRect.bottom()) ||
1174                                 (!scrollVertical && widgetRect.left() > rubberBandRect.right());
1175         } else {
1176             --index;
1177             selectionFinished = (index < 0) ||
1178                                 ( scrollVertical && widgetRect.bottom() < rubberBandRect.top()) ||
1179                                 (!scrollVertical && widgetRect.right()  < rubberBandRect.left());
1180         }
1181     } while (!selectionFinished);
1182
1183     if (QApplication::keyboardModifiers() & Qt::ControlModifier) {
1184         // If Control is pressed, the selection state of all items in the rubberband is toggled.
1185         // Therefore, the new selection contains:
1186         // 1. All previously selected items which are not inside the rubberband, and
1187         // 2. all items inside the rubberband which have not been selected previously.
1188         m_selectionManager->setSelectedItems(m_oldSelection ^ selectedItems);
1189     }
1190     else {
1191         m_selectionManager->setSelectedItems(selectedItems + m_oldSelection);
1192     }
1193 }
1194
1195 void KItemListController::startDragging()
1196 {
1197     if (!m_view || !m_model) {
1198         return;
1199     }
1200
1201     const KItemSet selectedItems = m_selectionManager->selectedItems();
1202     if (selectedItems.isEmpty()) {
1203         return;
1204     }
1205
1206     QMimeData* data = m_model->createMimeData(selectedItems);
1207     if (!data) {
1208         return;
1209     }
1210
1211     // The created drag object will be owned and deleted
1212     // by QApplication::activeWindow().
1213     QDrag* drag = new QDrag(QApplication::activeWindow());
1214     drag->setMimeData(data);
1215
1216     const QPixmap pixmap = m_view->createDragPixmap(selectedItems);
1217     drag->setPixmap(pixmap);
1218
1219     const QPoint hotSpot((pixmap.width() / pixmap.devicePixelRatio()) / 2, 0);
1220     drag->setHotSpot(hotSpot);
1221
1222     drag->exec(Qt::MoveAction | Qt::CopyAction | Qt::LinkAction, Qt::MoveAction);
1223
1224     QAccessibleEvent accessibilityEvent(view(), QAccessible::DragDropStart);
1225     QAccessible::updateAccessibility(&accessibilityEvent);
1226 }
1227
1228 KItemListWidget* KItemListController::hoveredWidget() const
1229 {
1230     Q_ASSERT(m_view);
1231
1232     foreach (KItemListWidget* widget, m_view->visibleItemListWidgets()) {
1233         if (widget->isHovered()) {
1234             return widget;
1235         }
1236     }
1237
1238     return nullptr;
1239 }
1240
1241 KItemListWidget* KItemListController::widgetForPos(const QPointF& pos) const
1242 {
1243     Q_ASSERT(m_view);
1244
1245     foreach (KItemListWidget* widget, m_view->visibleItemListWidgets()) {
1246         const QPointF mappedPos = widget->mapFromItem(m_view, pos);
1247
1248         const bool hovered = widget->contains(mappedPos) &&
1249                              !widget->expansionToggleRect().contains(mappedPos);
1250         if (hovered) {
1251             return widget;
1252         }
1253     }
1254
1255     return nullptr;
1256 }
1257
1258 void KItemListController::updateKeyboardAnchor()
1259 {
1260     const bool validAnchor = m_keyboardAnchorIndex >= 0 &&
1261                              m_keyboardAnchorIndex < m_model->count() &&
1262                              keyboardAnchorPos(m_keyboardAnchorIndex) == m_keyboardAnchorPos;
1263     if (!validAnchor) {
1264         const int index = m_selectionManager->currentItem();
1265         m_keyboardAnchorIndex = index;
1266         m_keyboardAnchorPos = keyboardAnchorPos(index);
1267     }
1268 }
1269
1270 int KItemListController::nextRowIndex(int index) const
1271 {
1272     if (m_keyboardAnchorIndex < 0) {
1273         return index;
1274     }
1275
1276     const int maxIndex = m_model->count() - 1;
1277     if (index == maxIndex) {
1278         return index;
1279     }
1280
1281     // Calculate the index of the last column inside the row of the current index
1282     int lastColumnIndex = index;
1283     while (keyboardAnchorPos(lastColumnIndex + 1) > keyboardAnchorPos(lastColumnIndex)) {
1284         ++lastColumnIndex;
1285         if (lastColumnIndex >= maxIndex) {
1286             return index;
1287         }
1288     }
1289
1290     // Based on the last column index go to the next row and calculate the nearest index
1291     // that is below the current index
1292     int nextRowIndex = lastColumnIndex + 1;
1293     int searchIndex = nextRowIndex;
1294     qreal minDiff = qAbs(m_keyboardAnchorPos - keyboardAnchorPos(nextRowIndex));
1295     while (searchIndex < maxIndex && keyboardAnchorPos(searchIndex + 1) > keyboardAnchorPos(searchIndex)) {
1296         ++searchIndex;
1297         const qreal searchDiff = qAbs(m_keyboardAnchorPos - keyboardAnchorPos(searchIndex));
1298         if (searchDiff < minDiff) {
1299             minDiff = searchDiff;
1300             nextRowIndex = searchIndex;
1301         }
1302     }
1303
1304     return nextRowIndex;
1305 }
1306
1307 int KItemListController::previousRowIndex(int index) const
1308 {
1309     if (m_keyboardAnchorIndex < 0 || index == 0) {
1310         return index;
1311     }
1312
1313     // Calculate the index of the first column inside the row of the current index
1314     int firstColumnIndex = index;
1315     while (keyboardAnchorPos(firstColumnIndex - 1) < keyboardAnchorPos(firstColumnIndex)) {
1316         --firstColumnIndex;
1317         if (firstColumnIndex <= 0) {
1318             return index;
1319         }
1320     }
1321
1322     // Based on the first column index go to the previous row and calculate the nearest index
1323     // that is above the current index
1324     int previousRowIndex = firstColumnIndex - 1;
1325     int searchIndex = previousRowIndex;
1326     qreal minDiff = qAbs(m_keyboardAnchorPos - keyboardAnchorPos(previousRowIndex));
1327     while (searchIndex > 0 && keyboardAnchorPos(searchIndex - 1) < keyboardAnchorPos(searchIndex)) {
1328         --searchIndex;
1329         const qreal searchDiff = qAbs(m_keyboardAnchorPos - keyboardAnchorPos(searchIndex));
1330         if (searchDiff < minDiff) {
1331             minDiff = searchDiff;
1332             previousRowIndex = searchIndex;
1333         }
1334     }
1335
1336     return previousRowIndex;
1337 }
1338
1339 qreal KItemListController::keyboardAnchorPos(int index) const
1340 {
1341     const QRectF itemRect = m_view->itemRect(index);
1342     if (!itemRect.isEmpty()) {
1343         return (m_view->scrollOrientation() == Qt::Vertical) ? itemRect.x() : itemRect.y();
1344     }
1345
1346     return 0;
1347 }
1348
1349 void KItemListController::updateExtendedSelectionRegion()
1350 {
1351     if (m_view) {
1352         const bool extend = (m_selectionBehavior != MultiSelection);
1353         KItemListStyleOption option = m_view->styleOption();
1354         if (option.extendedSelectionRegion != extend) {
1355             option.extendedSelectionRegion = extend;
1356             m_view->setStyleOption(option);
1357         }
1358     }
1359 }
1360