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