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  *   http://qt.gitorious.org/qt-labs/itemviews-ng                          *
   7  *                                                                         *
   8  *   This program is free software; you can redistribute it and/or modify  *
   9  *   it under the terms of the GNU General Public License as published by  *
  10  *   the Free Software Foundation; either version 2 of the License, or     *
  11  *   (at your option) any later version.                                   *
  12  *                                                                         *
  13  *   This program is distributed in the hope that it will be useful,       *
  14  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  15  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  16  *   GNU General Public License for more details.                          *
  17  *                                                                         *
  18  *   You should have received a copy of the GNU General Public License     *
  19  *   along with this program; if not, write to the                         *
  20  *   Free Software Foundation, Inc.,                                       *
  21  *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA            *
  22  ***************************************************************************/
  23
  24 #include "kitemlistcontroller.h"
  25
  26 #include "kitemlistselectionmanager.h"
  27 #include "kitemlistview.h"
  28 #include "private/kitemlistkeyboardsearchmanager.h"
  29 #include "private/kitemlistrubberband.h"
  30 #include "views/draganddrophelper.h"
  31
  32 #include <QAccessible>
  33 #include <QApplication>
  34 #include <QDrag>
  35 #include <QGraphicsScene>
  36 #include <QGraphicsSceneEvent>
  37 #include <QGraphicsView>
  38 #include <QMimeData>
  39 #include <QTimer>
  40
  41 KItemListController::KItemListController(KItemModelBase* model, KItemListView* view, QObject* parent) :
  42     QObject(parent),
  43     m_singleClickActivationEnforced(false),
  44     m_selectionTogglePressed(false),
  45     m_clearSelectionIfItemsAreNotDragged(false),
  46     m_selectionBehavior(NoSelection),
  47     m_autoActivationBehavior(ActivationAndExpansion),
  48     m_mouseDoubleClickAction(ActivateItemOnly),
  49     m_model(nullptr),
  50     m_view(nullptr),
  51     m_selectionManager(new KItemListSelectionManager(this)),
  52     m_keyboardManager(new KItemListKeyboardSearchManager(this)),
  53     m_pressedIndex(-1),
  54     m_pressedMousePos(),
  55     m_autoActivationTimer(nullptr),
  56     m_oldSelection(),
  57     m_keyboardAnchorIndex(-1),
  58     m_keyboardAnchorPos(0)
  59 {
  60     connect(m_keyboardManager, &KItemListKeyboardSearchManager::changeCurrentItem,
  61             this, &KItemListController::slotChangeCurrentItem);
  62     connect(m_selectionManager, &KItemListSelectionManager::currentChanged,
  63             m_keyboardManager, &KItemListKeyboardSearchManager::slotCurrentChanged);
  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
  74 KItemListController::~KItemListController()
  75 {
  76     setView(nullptr);
  77     Q_ASSERT(!m_view);
  78
  79     setModel(nullptr);
  80     Q_ASSERT(!m_model);
  81 }
  82
  83 void KItemListController::setModel(KItemModelBase* model)
  84 {
  85     if (m_model == model) {
  86         return;
  87     }
  88
  89     KItemModelBase* oldModel = m_model;
  90     if (oldModel) {
  91         oldModel->deleteLater();
  92     }
  93
  94     m_model = model;
  95     if (m_model) {
  96         m_model->setParent(this);
  97     }
  98
  99     if (m_view) {
 100         m_view->setModel(m_model);
 101     }
 102
 103     m_selectionManager->setModel(m_model);
 104
 105     emit modelChanged(m_model, oldModel);
 106 }
 107
 108 KItemModelBase* KItemListController::model() const
 109 {
 110     return m_model;
 111 }
 112
 113 KItemListSelectionManager* KItemListController::selectionManager() const
 114 {
 115     return m_selectionManager;
 116 }
 117
 118 void KItemListController::setView(KItemListView* view)
 119 {
 120     if (m_view == view) {
 121         return;
 122     }
 123
 124     KItemListView* oldView = m_view;
 125     if (oldView) {
 126         disconnect(oldView, &KItemListView::scrollOffsetChanged, this, &KItemListController::slotViewScrollOffsetChanged);
 127         oldView->deleteLater();
 128     }
 129
 130     m_view = view;
 131
 132     if (m_view) {
 133         m_view->setParent(this);
 134         m_view->setController(this);
 135         m_view->setModel(m_model);
 136         connect(m_view, &KItemListView::scrollOffsetChanged, this, &KItemListController::slotViewScrollOffsetChanged);
 137         updateExtendedSelectionRegion();
 138     }
 139
 140     emit viewChanged(m_view, oldView);
 141 }
 142
 143 KItemListView* KItemListController::view() const
 144 {
 145     return m_view;
 146 }
 147
 148 void KItemListController::setSelectionBehavior(SelectionBehavior behavior)
 149 {
 150     m_selectionBehavior = behavior;
 151     updateExtendedSelectionRegion();
 152 }
 153
 154 KItemListController::SelectionBehavior KItemListController::selectionBehavior() const
 155 {
 156     return m_selectionBehavior;
 157 }
 158
 159 void KItemListController::setAutoActivationBehavior(AutoActivationBehavior behavior)
 160 {
 161     m_autoActivationBehavior = behavior;
 162 }
 163
 164 KItemListController::AutoActivationBehavior KItemListController::autoActivationBehavior() const
 165 {
 166     return m_autoActivationBehavior;
 167 }
 168
 169 void KItemListController::setMouseDoubleClickAction(MouseDoubleClickAction action)
 170 {
 171     m_mouseDoubleClickAction = action;
 172 }
 173
 174 KItemListController::MouseDoubleClickAction KItemListController::mouseDoubleClickAction() const
 175 {
 176     return m_mouseDoubleClickAction;
 177 }
 178
 179 int KItemListController::indexCloseToMousePressedPosition() const
 180 {
 181     QHashIterator<KItemListWidget*, KItemListGroupHeader*> it(m_view->m_visibleGroups);
 182     while (it.hasNext()) {
 183         it.next();
 184         KItemListGroupHeader *groupHeader = it.value();
 185         const QPointF mappedToGroup = groupHeader->mapFromItem(nullptr, m_pressedMousePos);
 186         if (groupHeader->contains(mappedToGroup)) {
 187             return it.key()->index();
 188         }
 189     }
 190     return -1;
 191 }
 192
 193 void KItemListController::setAutoActivationDelay(int delay)
 194 {
 195     m_autoActivationTimer->setInterval(delay);
 196 }
 197
 198 int KItemListController::autoActivationDelay() const
 199 {
 200     return m_autoActivationTimer->interval();
 201 }
 202
 203 void KItemListController::setSingleClickActivationEnforced(bool singleClick)
 204 {
 205     m_singleClickActivationEnforced = singleClick;
 206 }
 207
 208 bool KItemListController::singleClickActivationEnforced() const
 209 {
 210     return m_singleClickActivationEnforced;
 211 }
 212
 213 bool KItemListController::keyPressEvent(QKeyEvent* event)
 214 {
 215     int index = m_selectionManager->currentItem();
 216     int key = event->key();
 217
 218     // Handle the expanding/collapsing of items
 219     if (m_view->supportsItemExpanding() && m_model->isExpandable(index)) {
 220         if (key == Qt::Key_Right) {
 221             if (m_model->setExpanded(index, true)) {
 222                 return true;
 223             }
 224         } else if (key == Qt::Key_Left) {
 225             if (m_model->setExpanded(index, false)) {
 226                 return true;
 227             }
 228         }
 229     }
 230
 231     const bool shiftPressed = event->modifiers() & Qt::ShiftModifier;
 232     const bool controlPressed = event->modifiers() & Qt::ControlModifier;
 233     const bool shiftOrControlPressed = shiftPressed || controlPressed;
 234     const bool navigationPressed = key == Qt::Key_Home || key == Qt::Key_End  ||
 235                                    key == Qt::Key_PageUp || key == Qt::Key_PageDown ||
 236                                    key == Qt::Key_Up || key == Qt::Key_Down ||
 237                                    key == Qt::Key_Left || key == Qt::Key_Right;
 238
 239     const int itemCount = m_model->count();
 240
 241     // For horizontal scroll orientation, transform
 242     // the arrow keys to simplify the event handling.
 243     if (m_view->scrollOrientation() == Qt::Horizontal) {
 244         switch (key) {
 245         case Qt::Key_Up:    key = Qt::Key_Left; break;
 246         case Qt::Key_Down:  key = Qt::Key_Right; break;
 247         case Qt::Key_Left:  key = Qt::Key_Up; break;
 248         case Qt::Key_Right: key = Qt::Key_Down; break;
 249         default:            break;
 250         }
 251     }
 252
 253     const bool selectSingleItem = m_selectionBehavior != NoSelection && itemCount == 1 && navigationPressed;
 254
 255     if (selectSingleItem) {
 256         const int current = m_selectionManager->currentItem();
 257         m_selectionManager->setSelected(current);
 258         return true;
 259     }
 260
 261     switch (key) {
 262     case Qt::Key_Home:
 263         index = 0;
 264         m_keyboardAnchorIndex = index;
 265         m_keyboardAnchorPos = keyboardAnchorPos(index);
 266         break;
 267
 268     case Qt::Key_End:
 269         index = itemCount - 1;
 270         m_keyboardAnchorIndex = index;
 271         m_keyboardAnchorPos = keyboardAnchorPos(index);
 272         break;
 273
 274     case Qt::Key_Left:
 275         if (index > 0) {
 276             const int expandedParentsCount = m_model->expandedParentsCount(index);
 277             if (expandedParentsCount == 0) {
 278                 --index;
 279             } else {
 280                 // Go to the parent of the current item.
 281                 do {
 282                     --index;
 283                 } while (index > 0 && m_model->expandedParentsCount(index) == expandedParentsCount);
 284             }
 285             m_keyboardAnchorIndex = index;
 286             m_keyboardAnchorPos = keyboardAnchorPos(index);
 287         }
 288         break;
 289
 290     case Qt::Key_Right:
 291         if (index < itemCount - 1) {
 292             ++index;
 293             m_keyboardAnchorIndex = index;
 294             m_keyboardAnchorPos = keyboardAnchorPos(index);
 295         }
 296         break;
 297
 298     case Qt::Key_Up:
 299         updateKeyboardAnchor();
 300         index = previousRowIndex(index);
 301         break;
 302
 303     case Qt::Key_Down:
 304         updateKeyboardAnchor();
 305         index = nextRowIndex(index);
 306         break;
 307
 308     case Qt::Key_PageUp:
 309         if (m_view->scrollOrientation() == Qt::Horizontal) {
 310             // The new current index should correspond to the first item in the current column.
 311             int newIndex = qMax(index - 1, 0);
 312             while (newIndex != index && m_view->itemRect(newIndex).topLeft().y() < m_view->itemRect(index).topLeft().y()) {
 313                 index = newIndex;
 314                 newIndex = qMax(index - 1, 0);
 315             }
 316             m_keyboardAnchorIndex = index;
 317             m_keyboardAnchorPos = keyboardAnchorPos(index);
 318         } else {
 319             const qreal currentItemBottom = m_view->itemRect(index).bottomLeft().y();
 320             const qreal height = m_view->geometry().height();
 321
 322             // The new current item should be the first item in the current
 323             // column whose itemRect's top coordinate is larger than targetY.
 324             const qreal targetY = currentItemBottom - height;
 325
 326             updateKeyboardAnchor();
 327             int newIndex = previousRowIndex(index);
 328             do {
 329                 index = newIndex;
 330                 updateKeyboardAnchor();
 331                 newIndex = previousRowIndex(index);
 332             } while (m_view->itemRect(newIndex).topLeft().y() > targetY && newIndex != index);
 333         }
 334         break;
 335
 336     case Qt::Key_PageDown:
 337         if (m_view->scrollOrientation() == Qt::Horizontal) {
 338             // The new current index should correspond to the last item in the current column.
 339             int newIndex = qMin(index + 1, m_model->count() - 1);
 340             while (newIndex != index && m_view->itemRect(newIndex).topLeft().y() > m_view->itemRect(index).topLeft().y()) {
 341                 index = newIndex;
 342                 newIndex = qMin(index + 1, m_model->count() - 1);
 343             }
 344             m_keyboardAnchorIndex = index;
 345             m_keyboardAnchorPos = keyboardAnchorPos(index);
 346         } else {
 347             const qreal currentItemTop = m_view->itemRect(index).topLeft().y();
 348             const qreal height = m_view->geometry().height();
 349
 350             // The new current item should be the last item in the current
 351             // column whose itemRect's bottom coordinate is smaller than targetY.
 352             const qreal targetY = currentItemTop + height;
 353
 354             updateKeyboardAnchor();
 355             int newIndex = nextRowIndex(index);
 356             do {
 357                 index = newIndex;
 358                 updateKeyboardAnchor();
 359                 newIndex = nextRowIndex(index);
 360             } while (m_view->itemRect(newIndex).bottomLeft().y() < targetY && newIndex != index);
 361         }
 362         break;
 363
 364     case Qt::Key_Enter:
 365     case Qt::Key_Return: {
 366         const KItemSet selectedItems = m_selectionManager->selectedItems();
 367         if (selectedItems.count() >= 2) {
 368             emit itemsActivated(selectedItems);
 369         } else if (selectedItems.count() == 1) {
 370             emit itemActivated(selectedItems.first());
 371         } else {
 372             emit itemActivated(index);
 373         }
 374         break;
 375     }
 376
 377     case Qt::Key_Menu: {
 378         // Emit the signal itemContextMenuRequested() in case if at least one
 379         // item is selected. Otherwise the signal viewContextMenuRequested() will be emitted.
 380         const KItemSet selectedItems = m_selectionManager->selectedItems();
 381         int index = -1;
 382         if (selectedItems.count() >= 2) {
 383             const int currentItemIndex = m_selectionManager->currentItem();
 384             index = selectedItems.contains(currentItemIndex)
 385                     ? currentItemIndex : selectedItems.first();
 386         } else if (selectedItems.count() == 1) {
 387             index = selectedItems.first();
 388         }
 389
 390         if (index >= 0) {
 391             const QRectF contextRect = m_view->itemContextRect(index);
 392             const QPointF pos(m_view->scene()->views().first()->mapToGlobal(contextRect.bottomRight().toPoint()));
 393             emit itemContextMenuRequested(index, pos);
 394         } else {
 395             emit viewContextMenuRequested(QCursor::pos());
 396         }
 397         break;
 398     }
 399
 400     case Qt::Key_Escape:
 401         if (m_selectionBehavior != SingleSelection) {
 402             m_selectionManager->clearSelection();
 403         }
 404         m_keyboardManager->cancelSearch();
 405         emit escapePressed();
 406         break;
 407
 408     case Qt::Key_Space:
 409         if (m_selectionBehavior == MultiSelection) {
 410             if (controlPressed) {
 411                 // Toggle the selection state of the current item.
 412                 m_selectionManager->endAnchoredSelection();
 413                 m_selectionManager->setSelected(index, 1, KItemListSelectionManager::Toggle);
 414                 m_selectionManager->beginAnchoredSelection(index);
 415                 break;
 416             } else {
 417                 // Select the current item if it is not selected yet.
 418                 const int current = m_selectionManager->currentItem();
 419                 if (!m_selectionManager->isSelected(current)) {
 420                     m_selectionManager->setSelected(current);
 421                     break;
 422                 }
 423             }
 424         }
 425         Q_FALLTHROUGH();  // fall through to the default case and add the Space to the current search string.
 426     default:
 427         m_keyboardManager->addKeys(event->text());
 428         // Make sure unconsumed events get propagated up the chain. #302329
 429         event->ignore();
 430         return false;
 431     }
 432
 433     if (m_selectionManager->currentItem() != index) {
 434         switch (m_selectionBehavior) {
 435         case NoSelection:
 436             m_selectionManager->setCurrentItem(index);
 437             break;
 438
 439         case SingleSelection:
 440             m_selectionManager->setCurrentItem(index);
 441             m_selectionManager->clearSelection();
 442             m_selectionManager->setSelected(index, 1);
 443             break;
 444
 445         case MultiSelection:
 446             if (controlPressed) {
 447                 m_selectionManager->endAnchoredSelection();
 448             }
 449
 450             m_selectionManager->setCurrentItem(index);
 451
 452             if (!shiftOrControlPressed) {
 453                 m_selectionManager->clearSelection();
 454                 m_selectionManager->setSelected(index, 1);
 455             }
 456
 457             if (!shiftPressed) {
 458                 m_selectionManager->beginAnchoredSelection(index);
 459             }
 460             break;
 461         }
 462     }
 463
 464     if (navigationPressed) {
 465         m_view->scrollToItem(index);
 466     }
 467     return true;
 468 }
 469
 470 void KItemListController::slotChangeCurrentItem(const QString& text, bool searchFromNextItem)
 471 {
 472     if (!m_model || m_model->count() == 0) {
 473         return;
 474     }
 475     const int currentIndex = m_selectionManager->currentItem();
 476     int index;
 477     if (searchFromNextItem) {
 478         index = m_model->indexForKeyboardSearch(text, (currentIndex + 1) % m_model->count());
 479     } else {
 480         index = m_model->indexForKeyboardSearch(text, currentIndex);
 481     }
 482     if (index >= 0) {
 483         m_selectionManager->setCurrentItem(index);
 484
 485         if (m_selectionBehavior != NoSelection) {
 486             m_selectionManager->clearSelection();
 487             m_selectionManager->setSelected(index, 1);
 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     event->setAccepted(!DragAndDropHelper::urlListMatchesUrl(event->mimeData()->urls(), hoveredDir));
 933
 934     return false;
 935 }
 936
 937 bool KItemListController::dropEvent(QGraphicsSceneDragDropEvent* event, const QTransform& transform)
 938 {
 939     if (!m_view) {
 940         return false;
 941     }
 942
 943     m_autoActivationTimer->stop();
 944     m_view->setAutoScroll(false);
 945
 946     const QPointF pos = transform.map(event->pos());
 947
 948     int dropAboveIndex = -1;
 949     if (m_model->sortRole().isEmpty()) {
 950         // The model supports inserting of items between other items.
 951         dropAboveIndex = m_view->showDropIndicator(pos);
 952     }
 953
 954     if (dropAboveIndex >= 0) {
 955         // Something has been dropped between two items.
 956         m_view->hideDropIndicator();
 957         emit aboveItemDropEvent(dropAboveIndex, event);
 958     } else if (!event->mimeData()->hasFormat(m_model->blacklistItemDropEventMimeType())) {
 959         // Something has been dropped on an item or on an empty part of the view.
 960         emit itemDropEvent(m_view->itemAt(pos), event);
 961     }
 962
 963     QAccessibleEvent accessibilityEvent(view(), QAccessible::DragDropEnd);
 964     QAccessible::updateAccessibility(&accessibilityEvent);
 965
 966     return true;
 967 }
 968
 969 bool KItemListController::hoverEnterEvent(QGraphicsSceneHoverEvent* event, const QTransform& transform)
 970 {
 971     Q_UNUSED(event);
 972     Q_UNUSED(transform);
 973     return false;
 974 }
 975
 976 bool KItemListController::hoverMoveEvent(QGraphicsSceneHoverEvent* event, const QTransform& transform)
 977 {
 978     Q_UNUSED(transform);
 979     if (!m_model || !m_view) {
 980         return false;
 981     }
 982
 983     KItemListWidget* oldHoveredWidget = hoveredWidget();
 984     const QPointF pos = transform.map(event->pos());
 985     KItemListWidget* newHoveredWidget = widgetForPos(pos);
 986
 987     if (oldHoveredWidget != newHoveredWidget) {
 988         if (oldHoveredWidget) {
 989             oldHoveredWidget->setHovered(false);
 990             emit itemUnhovered(oldHoveredWidget->index());
 991         }
 992
 993         if (newHoveredWidget) {
 994             newHoveredWidget->setHovered(true);
 995             const QPointF mappedPos = newHoveredWidget->mapFromItem(m_view, pos);
 996             newHoveredWidget->setHoverPosition(mappedPos);
 997             emit itemHovered(newHoveredWidget->index());
 998         }
 999     } else if (oldHoveredWidget) {
1000         const QPointF mappedPos = oldHoveredWidget->mapFromItem(m_view, pos);
1001         oldHoveredWidget->setHoverPosition(mappedPos);
1002     }
1003
1004     return false;
1005 }
1006
1007 bool KItemListController::hoverLeaveEvent(QGraphicsSceneHoverEvent* event, const QTransform& transform)
1008 {
1009     Q_UNUSED(event);
1010     Q_UNUSED(transform);
1011
1012     if (!m_model || !m_view) {
1013         return false;
1014     }
1015
1016     foreach (KItemListWidget* widget, m_view->visibleItemListWidgets()) {
1017         if (widget->isHovered()) {
1018             widget->setHovered(false);
1019             emit itemUnhovered(widget->index());
1020         }
1021     }
1022     return false;
1023 }
1024
1025 bool KItemListController::wheelEvent(QGraphicsSceneWheelEvent* event, const QTransform& transform)
1026 {
1027     Q_UNUSED(event);
1028     Q_UNUSED(transform);
1029     return false;
1030 }
1031
1032 bool KItemListController::resizeEvent(QGraphicsSceneResizeEvent* event, const QTransform& transform)
1033 {
1034     Q_UNUSED(event);
1035     Q_UNUSED(transform);
1036     return false;
1037 }
1038
1039 bool KItemListController::processEvent(QEvent* event, const QTransform& transform)
1040 {
1041     if (!event) {
1042         return false;
1043     }
1044
1045     switch (event->type()) {
1046     case QEvent::KeyPress:
1047         return keyPressEvent(static_cast<QKeyEvent*>(event));
1048     case QEvent::InputMethod:
1049         return inputMethodEvent(static_cast<QInputMethodEvent*>(event));
1050     case QEvent::GraphicsSceneMousePress:
1051         return mousePressEvent(static_cast<QGraphicsSceneMouseEvent*>(event), QTransform());
1052     case QEvent::GraphicsSceneMouseMove:
1053         return mouseMoveEvent(static_cast<QGraphicsSceneMouseEvent*>(event), QTransform());
1054     case QEvent::GraphicsSceneMouseRelease:
1055         return mouseReleaseEvent(static_cast<QGraphicsSceneMouseEvent*>(event), QTransform());
1056     case QEvent::GraphicsSceneMouseDoubleClick:
1057         return mouseDoubleClickEvent(static_cast<QGraphicsSceneMouseEvent*>(event), QTransform());
1058     case QEvent::GraphicsSceneWheel:
1059          return wheelEvent(static_cast<QGraphicsSceneWheelEvent*>(event), QTransform());
1060     case QEvent::GraphicsSceneDragEnter:
1061         return dragEnterEvent(static_cast<QGraphicsSceneDragDropEvent*>(event), QTransform());
1062     case QEvent::GraphicsSceneDragLeave:
1063         return dragLeaveEvent(static_cast<QGraphicsSceneDragDropEvent*>(event), QTransform());
1064     case QEvent::GraphicsSceneDragMove:
1065         return dragMoveEvent(static_cast<QGraphicsSceneDragDropEvent*>(event), QTransform());
1066     case QEvent::GraphicsSceneDrop:
1067         return dropEvent(static_cast<QGraphicsSceneDragDropEvent*>(event), QTransform());
1068     case QEvent::GraphicsSceneHoverEnter:
1069         return hoverEnterEvent(static_cast<QGraphicsSceneHoverEvent*>(event), QTransform());
1070     case QEvent::GraphicsSceneHoverMove:
1071         return hoverMoveEvent(static_cast<QGraphicsSceneHoverEvent*>(event), QTransform());
1072     case QEvent::GraphicsSceneHoverLeave:
1073         return hoverLeaveEvent(static_cast<QGraphicsSceneHoverEvent*>(event), QTransform());
1074     case QEvent::GraphicsSceneResize:
1075         return resizeEvent(static_cast<QGraphicsSceneResizeEvent*>(event), transform);
1076     default:
1077         break;
1078     }
1079
1080     return false;
1081 }
1082
1083 void KItemListController::slotViewScrollOffsetChanged(qreal current, qreal previous)
1084 {
1085     if (!m_view) {
1086         return;
1087     }
1088
1089     KItemListRubberBand* rubberBand = m_view->rubberBand();
1090     if (rubberBand->isActive()) {
1091         const qreal diff = current - previous;
1092         // TODO: Ideally just QCursor::pos() should be used as
1093         // new end-position but it seems there is no easy way
1094         // to have something like QWidget::mapFromGlobal() for QGraphicsWidget
1095         // (... or I just missed an easy way to do the mapping)
1096         QPointF endPos = rubberBand->endPosition();
1097         if (m_view->scrollOrientation() == Qt::Vertical) {
1098             endPos.ry() += diff;
1099         } else {
1100             endPos.rx() += diff;
1101         }
1102
1103         rubberBand->setEndPosition(endPos);
1104     }
1105 }
1106
1107 void KItemListController::slotRubberBandChanged()
1108 {
1109     if (!m_view || !m_model || m_model->count() <= 0) {
1110         return;
1111     }
1112
1113     const KItemListRubberBand* rubberBand = m_view->rubberBand();
1114     const QPointF startPos = rubberBand->startPosition();
1115     const QPointF endPos = rubberBand->endPosition();
1116     QRectF rubberBandRect = QRectF(startPos, endPos).normalized();
1117
1118     const bool scrollVertical = (m_view->scrollOrientation() == Qt::Vertical);
1119     if (scrollVertical) {
1120         rubberBandRect.translate(0, -m_view->scrollOffset());
1121     } else {
1122         rubberBandRect.translate(-m_view->scrollOffset(), 0);
1123     }
1124
1125     if (!m_oldSelection.isEmpty()) {
1126         // Clear the old selection that was available before the rubberband has
1127         // been activated in case if no Shift- or Control-key are pressed
1128         const bool shiftOrControlPressed = QApplication::keyboardModifiers() & Qt::ShiftModifier ||
1129                                            QApplication::keyboardModifiers() & Qt::ControlModifier;
1130         if (!shiftOrControlPressed) {
1131             m_oldSelection.clear();
1132         }
1133     }
1134
1135     KItemSet selectedItems;
1136
1137     // Select all visible items that intersect with the rubberband
1138     foreach (const KItemListWidget* widget, m_view->visibleItemListWidgets()) {
1139         const int index = widget->index();
1140
1141         const QRectF widgetRect = m_view->itemRect(index);
1142         if (widgetRect.intersects(rubberBandRect)) {
1143             const QRectF iconRect = widget->iconRect().translated(widgetRect.topLeft());
1144             const QRectF textRect = widget->textRect().translated(widgetRect.topLeft());
1145             if (iconRect.intersects(rubberBandRect) || textRect.intersects(rubberBandRect)) {
1146                 selectedItems.insert(index);
1147             }
1148         }
1149     }
1150
1151     // Select all invisible items that intersect with the rubberband. Instead of
1152     // iterating all items only the area which might be touched by the rubberband
1153     // will be checked.
1154     const bool increaseIndex = scrollVertical ?
1155                                startPos.y() > endPos.y(): startPos.x() > endPos.x();
1156
1157     int index = increaseIndex ? m_view->lastVisibleIndex() + 1 : m_view->firstVisibleIndex() - 1;
1158     bool selectionFinished = false;
1159     do {
1160         const QRectF widgetRect = m_view->itemRect(index);
1161         if (widgetRect.intersects(rubberBandRect)) {
1162             selectedItems.insert(index);
1163         }
1164
1165         if (increaseIndex) {
1166             ++index;
1167             selectionFinished = (index >= m_model->count()) ||
1168                                 ( scrollVertical && widgetRect.top()  > rubberBandRect.bottom()) ||
1169                                 (!scrollVertical && widgetRect.left() > rubberBandRect.right());
1170         } else {
1171             --index;
1172             selectionFinished = (index < 0) ||
1173                                 ( scrollVertical && widgetRect.bottom() < rubberBandRect.top()) ||
1174                                 (!scrollVertical && widgetRect.right()  < rubberBandRect.left());
1175         }
1176     } while (!selectionFinished);
1177
1178     if (QApplication::keyboardModifiers() & Qt::ControlModifier) {
1179         // If Control is pressed, the selection state of all items in the rubberband is toggled.
1180         // Therefore, the new selection contains:
1181         // 1. All previously selected items which are not inside the rubberband, and
1182         // 2. all items inside the rubberband which have not been selected previously.
1183         m_selectionManager->setSelectedItems(m_oldSelection ^ selectedItems);
1184     }
1185     else {
1186         m_selectionManager->setSelectedItems(selectedItems + m_oldSelection);
1187     }
1188 }
1189
1190 void KItemListController::startDragging()
1191 {
1192     if (!m_view || !m_model) {
1193         return;
1194     }
1195
1196     const KItemSet selectedItems = m_selectionManager->selectedItems();
1197     if (selectedItems.isEmpty()) {
1198         return;
1199     }
1200
1201     QMimeData* data = m_model->createMimeData(selectedItems);
1202     if (!data) {
1203         return;
1204     }
1205
1206     // The created drag object will be owned and deleted
1207     // by QApplication::activeWindow().
1208     QDrag* drag = new QDrag(QApplication::activeWindow());
1209     drag->setMimeData(data);
1210
1211     const QPixmap pixmap = m_view->createDragPixmap(selectedItems);
1212     drag->setPixmap(pixmap);
1213
1214     const QPoint hotSpot((pixmap.width() / pixmap.devicePixelRatio()) / 2, 0);
1215     drag->setHotSpot(hotSpot);
1216
1217     drag->exec(Qt::MoveAction | Qt::CopyAction | Qt::LinkAction, Qt::CopyAction);
1218
1219     QAccessibleEvent accessibilityEvent(view(), QAccessible::DragDropStart);
1220     QAccessible::updateAccessibility(&accessibilityEvent);
1221 }
1222
1223 KItemListWidget* KItemListController::hoveredWidget() const
1224 {
1225     Q_ASSERT(m_view);
1226
1227     foreach (KItemListWidget* widget, m_view->visibleItemListWidgets()) {
1228         if (widget->isHovered()) {
1229             return widget;
1230         }
1231     }
1232
1233     return nullptr;
1234 }
1235
1236 KItemListWidget* KItemListController::widgetForPos(const QPointF& pos) const
1237 {
1238     Q_ASSERT(m_view);
1239
1240     foreach (KItemListWidget* widget, m_view->visibleItemListWidgets()) {
1241         const QPointF mappedPos = widget->mapFromItem(m_view, pos);
1242
1243         const bool hovered = widget->contains(mappedPos) &&
1244                              !widget->expansionToggleRect().contains(mappedPos);
1245         if (hovered) {
1246             return widget;
1247         }
1248     }
1249
1250     return nullptr;
1251 }
1252
1253 void KItemListController::updateKeyboardAnchor()
1254 {
1255     const bool validAnchor = m_keyboardAnchorIndex >= 0 &&
1256                              m_keyboardAnchorIndex < m_model->count() &&
1257                              keyboardAnchorPos(m_keyboardAnchorIndex) == m_keyboardAnchorPos;
1258     if (!validAnchor) {
1259         const int index = m_selectionManager->currentItem();
1260         m_keyboardAnchorIndex = index;
1261         m_keyboardAnchorPos = keyboardAnchorPos(index);
1262     }
1263 }
1264
1265 int KItemListController::nextRowIndex(int index) const
1266 {
1267     if (m_keyboardAnchorIndex < 0) {
1268         return index;
1269     }
1270
1271     const int maxIndex = m_model->count() - 1;
1272     if (index == maxIndex) {
1273         return index;
1274     }
1275
1276     // Calculate the index of the last column inside the row of the current index
1277     int lastColumnIndex = index;
1278     while (keyboardAnchorPos(lastColumnIndex + 1) > keyboardAnchorPos(lastColumnIndex)) {
1279         ++lastColumnIndex;
1280         if (lastColumnIndex >= maxIndex) {
1281             return index;
1282         }
1283     }
1284
1285     // Based on the last column index go to the next row and calculate the nearest index
1286     // that is below the current index
1287     int nextRowIndex = lastColumnIndex + 1;
1288     int searchIndex = nextRowIndex;
1289     qreal minDiff = qAbs(m_keyboardAnchorPos - keyboardAnchorPos(nextRowIndex));
1290     while (searchIndex < maxIndex && keyboardAnchorPos(searchIndex + 1) > keyboardAnchorPos(searchIndex)) {
1291         ++searchIndex;
1292         const qreal searchDiff = qAbs(m_keyboardAnchorPos - keyboardAnchorPos(searchIndex));
1293         if (searchDiff < minDiff) {
1294             minDiff = searchDiff;
1295             nextRowIndex = searchIndex;
1296         }
1297     }
1298
1299     return nextRowIndex;
1300 }
1301
1302 int KItemListController::previousRowIndex(int index) const
1303 {
1304     if (m_keyboardAnchorIndex < 0 || index == 0) {
1305         return index;
1306     }
1307
1308     // Calculate the index of the first column inside the row of the current index
1309     int firstColumnIndex = index;
1310     while (keyboardAnchorPos(firstColumnIndex - 1) < keyboardAnchorPos(firstColumnIndex)) {
1311         --firstColumnIndex;
1312         if (firstColumnIndex <= 0) {
1313             return index;
1314         }
1315     }
1316
1317     // Based on the first column index go to the previous row and calculate the nearest index
1318     // that is above the current index
1319     int previousRowIndex = firstColumnIndex - 1;
1320     int searchIndex = previousRowIndex;
1321     qreal minDiff = qAbs(m_keyboardAnchorPos - keyboardAnchorPos(previousRowIndex));
1322     while (searchIndex > 0 && keyboardAnchorPos(searchIndex - 1) < keyboardAnchorPos(searchIndex)) {
1323         --searchIndex;
1324         const qreal searchDiff = qAbs(m_keyboardAnchorPos - keyboardAnchorPos(searchIndex));
1325         if (searchDiff < minDiff) {
1326             minDiff = searchDiff;
1327             previousRowIndex = searchIndex;
1328         }
1329     }
1330
1331     return previousRowIndex;
1332 }
1333
1334 qreal KItemListController::keyboardAnchorPos(int index) const
1335 {
1336     const QRectF itemRect = m_view->itemRect(index);
1337     if (!itemRect.isEmpty()) {
1338         return (m_view->scrollOrientation() == Qt::Vertical) ? itemRect.x() : itemRect.y();
1339     }
1340
1341     return 0;
1342 }
1343
1344 void KItemListController::updateExtendedSelectionRegion()
1345 {
1346     if (m_view) {
1347         const bool extend = (m_selectionBehavior != MultiSelection);
1348         KItemListStyleOption option = m_view->styleOption();
1349         if (option.extendedSelectionRegion != extend) {
1350             option.extendedSelectionRegion = extend;
1351             m_view->setStyleOption(option);
1352         }
1353     }
1354 }
1355