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