src/kitemviews/kitemlistcontroller.cpp

   1 /***************************************************************************
   2  *   Copyright (C) 2011 by Peter Penz <peter.penz19@gmail.com>             *
   3  *                                                                         *
   4  *   Based on the Itemviews NG project from Trolltech Labs:                *
   5  *   http://qt.gitorious.org/qt-labs/itemviews-ng                          *
   6  *                                                                         *
   7  *   This program is free software; you can redistribute it and/or modify  *
   8  *   it under the terms of the GNU General Public License as published by  *
   9  *   the Free Software Foundation; either version 2 of the License, or     *
  10  *   (at your option) any later version.                                   *
  11  *                                                                         *
  12  *   This program is distributed in the hope that it will be useful,       *
  13  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  14  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  15  *   GNU General Public License for more details.                          *
  16  *                                                                         *
  17  *   You should have received a copy of the GNU General Public License     *
  18  *   along with this program; if not, write to the                         *
  19  *   Free Software Foundation, Inc.,                                       *
  20  *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA            *
  21  ***************************************************************************/
  22
  23 #include "kitemlistcontroller.h"
  24
  25 #include "kitemlistview.h"
  26 #include "kitemlistrubberband_p.h"
  27 #include "kitemlistselectionmanager.h"
  28
  29 // TODO: Remove after moving mimeData() and createDropPixmap() into
  30 // KFileItemModel/KFileItemListView
  31 #include "kfileitemmodel.h"
  32 #include <KIcon>
  33
  34 #include <QApplication>
  35 #include <QDrag>
  36 #include <QEvent>
  37 #include <QGraphicsSceneEvent>
  38 #include <QMimeData>
  39
  40 #include <KDebug>
  41
  42 KItemListController::KItemListController(QObject* parent) :
  43     QObject(parent),
  44     m_dragging(false),
  45     m_selectionBehavior(NoSelection),
  46     m_model(0),
  47     m_view(0),
  48     m_selectionManager(new KItemListSelectionManager(this)),
  49     m_pressedIndex(-1),
  50     m_pressedMousePos(),
  51     m_oldSelection()
  52 {
  53 }
  54
  55 KItemListController::~KItemListController()
  56 {
  57 }
  58
  59 void KItemListController::setModel(KItemModelBase* model)
  60 {
  61     if (m_model == model) {
  62         return;
  63     }
  64
  65     KItemModelBase* oldModel = m_model;
  66     m_model = model;
  67
  68     if (m_view) {
  69         m_view->setModel(m_model);
  70     }
  71
  72     m_selectionManager->setModel(m_model);
  73
  74     emit modelChanged(m_model, oldModel);
  75 }
  76
  77 KItemModelBase* KItemListController::model() const
  78 {
  79     return m_model;
  80 }
  81
  82 KItemListSelectionManager* KItemListController::selectionManager() const
  83 {
  84     return m_selectionManager;
  85 }
  86
  87 void KItemListController::setView(KItemListView* view)
  88 {
  89     if (m_view == view) {
  90         return;
  91     }
  92
  93     KItemListView* oldView = m_view;
  94     if (oldView) {
  95         disconnect(oldView, SIGNAL(offsetChanged(qreal,qreal)), this, SLOT(slotViewOffsetChanged(qreal,qreal)));
  96     }
  97
  98     m_view = view;
  99
 100     if (m_view) {
 101         m_view->setController(this);
 102         m_view->setModel(m_model);
 103         connect(m_view, SIGNAL(offsetChanged(qreal,qreal)), this, SLOT(slotViewOffsetChanged(qreal,qreal)));
 104     }
 105
 106     emit viewChanged(m_view, oldView);
 107 }
 108
 109 KItemListView* KItemListController::view() const
 110 {
 111     return m_view;
 112 }
 113
 114 void KItemListController::setSelectionBehavior(SelectionBehavior behavior)
 115 {
 116     m_selectionBehavior = behavior;
 117 }
 118
 119 KItemListController::SelectionBehavior KItemListController::selectionBehavior() const
 120 {
 121     return m_selectionBehavior;
 122 }
 123
 124 bool KItemListController::showEvent(QShowEvent* event)
 125 {
 126     Q_UNUSED(event);
 127     return false;
 128 }
 129
 130 bool KItemListController::hideEvent(QHideEvent* event)
 131 {
 132     Q_UNUSED(event);
 133     return false;
 134 }
 135
 136 bool KItemListController::keyPressEvent(QKeyEvent* event)
 137 {
 138     const bool shiftPressed = event->modifiers() & Qt::ShiftModifier;
 139     const bool controlPressed = event->modifiers() & Qt::ControlModifier;
 140     const bool shiftOrControlPressed = shiftPressed || controlPressed;
 141
 142     int index = m_selectionManager->currentItem();
 143     const int itemCount = m_model->count();
 144     const int itemsPerRow = m_view->itemsPerOffset();
 145
 146     // For horizontal scroll orientation, transform
 147     // the arrow keys to simplify the event handling.
 148     int key = event->key();
 149     if (m_view->scrollOrientation() == Qt::Horizontal) {
 150         switch (key) {
 151         case Qt::Key_Up:    key = Qt::Key_Left; break;
 152         case Qt::Key_Down:  key = Qt::Key_Right; break;
 153         case Qt::Key_Left:  key = Qt::Key_Up; break;
 154         case Qt::Key_Right: key = Qt::Key_Down; break;
 155         default:            break;
 156         }
 157     }
 158
 159     switch (key) {
 160     case Qt::Key_Home:
 161         index = 0;
 162         break;
 163
 164     case Qt::Key_End:
 165         index = itemCount - 1;
 166         break;
 167
 168     case Qt::Key_Left:
 169         if (index > 0) {
 170             index--;
 171         }
 172         break;
 173
 174     case Qt::Key_Right:
 175         if (index < itemCount - 1) {
 176             index++;
 177         }
 178         break;
 179
 180     case Qt::Key_Up:
 181         if (index >= itemsPerRow) {
 182             index -= itemsPerRow;
 183         }
 184         break;
 185
 186     case Qt::Key_Down:
 187         if (index + itemsPerRow < itemCount) {
 188             // We are not in the last row yet.
 189             index += itemsPerRow;
 190         }
 191         else {
 192             // We are either in the last row already, or we are in the second-last row,
 193             // and there is no item below the current item.
 194             // In the latter case, we jump to the very last item.
 195             const int currentColumn = index % itemsPerRow;
 196             const int lastItemColumn = (itemCount - 1) % itemsPerRow;
 197             const bool inLastRow = currentColumn < lastItemColumn;
 198             if (!inLastRow) {
 199                 index = itemCount - 1;
 200             }
 201         }
 202         break;
 203
 204     case Qt::Key_Space:
 205         if (controlPressed) {
 206             m_selectionManager->endAnchoredSelection();
 207             m_selectionManager->setSelected(index, 1, KItemListSelectionManager::Toggle);
 208             m_selectionManager->beginAnchoredSelection(index);
 209         }
 210
 211     default:
 212         break;
 213     }
 214
 215     if (m_selectionManager->currentItem() != index) {
 216         if (controlPressed) {
 217             m_selectionManager->endAnchoredSelection();
 218         }
 219
 220         m_selectionManager->setCurrentItem(index);
 221
 222         if (!shiftOrControlPressed || m_selectionBehavior == SingleSelection) {
 223             m_selectionManager->clearSelection();
 224             m_selectionManager->setSelected(index, 1);
 225         }
 226
 227         if (!shiftPressed) {
 228             m_selectionManager->beginAnchoredSelection(index);
 229         }
 230     }
 231     return true;
 232 }
 233
 234 bool KItemListController::inputMethodEvent(QInputMethodEvent* event)
 235 {
 236     Q_UNUSED(event);
 237     return false;
 238 }
 239
 240 bool KItemListController::mousePressEvent(QGraphicsSceneMouseEvent* event, const QTransform& transform)
 241 {
 242     if (!m_view) {
 243         return false;
 244     }
 245
 246     m_pressedMousePos = transform.map(event->pos());
 247     m_pressedIndex = m_view->itemAt(m_pressedMousePos);
 248
 249     if (m_view->isAboveExpansionToggle(m_pressedIndex, m_pressedMousePos)) {
 250         return true;
 251     }
 252
 253     const bool shiftPressed = event->modifiers() & Qt::ShiftModifier;
 254     const bool controlPressed = event->modifiers() & Qt::ControlModifier;
 255     const bool shiftOrControlPressed = shiftPressed || controlPressed;
 256
 257     if (!shiftOrControlPressed || m_selectionBehavior == SingleSelection) {
 258         m_selectionManager->clearSelection();
 259     }
 260
 261     if (!shiftPressed) {
 262         // Finish the anchored selection before the current index is changed
 263         m_selectionManager->endAnchoredSelection();
 264     }
 265
 266     if (m_pressedIndex >= 0) {
 267         m_selectionManager->setCurrentItem(m_pressedIndex);
 268
 269         switch (m_selectionBehavior) {
 270         case NoSelection:
 271             break;
 272
 273         case SingleSelection:
 274             m_selectionManager->setSelected(m_pressedIndex);
 275             break;
 276
 277         case MultiSelection:
 278             if (controlPressed) {
 279                 m_selectionManager->setSelected(m_pressedIndex, 1, KItemListSelectionManager::Toggle);
 280                 m_selectionManager->beginAnchoredSelection(m_pressedIndex);
 281             } else if (!shiftPressed || !m_selectionManager->isAnchoredSelectionActive()) {
 282                 // Select the pressed item and start a new anchored selection
 283                 m_selectionManager->setSelected(m_pressedIndex, 1, KItemListSelectionManager::Select);
 284                 m_selectionManager->beginAnchoredSelection(m_pressedIndex);
 285             }
 286             break;
 287
 288         default:
 289             Q_ASSERT(false);
 290             break;
 291         }
 292
 293         return true;
 294     } else {
 295         KItemListRubberBand* rubberBand = m_view->rubberBand();
 296         QPointF startPos = m_pressedMousePos;
 297         if (m_view->scrollOrientation() == Qt::Vertical) {
 298             startPos.ry() += m_view->offset();
 299             if (m_view->itemSize().width() < 0) {
 300                 // Use a special rubberband for views that have only one column and
 301                 // expand the rubberband to use the whole width of the view.
 302                 startPos.setX(0);
 303             }
 304         } else {
 305             startPos.rx() += m_view->offset();
 306         }
 307
 308         m_oldSelection = m_selectionManager->selectedItems();
 309         rubberBand->setStartPosition(startPos);
 310         rubberBand->setEndPosition(startPos);
 311         rubberBand->setActive(true);
 312         connect(rubberBand, SIGNAL(endPositionChanged(QPointF,QPointF)), this, SLOT(slotRubberBandChanged()));
 313     }
 314
 315     return false;
 316 }
 317
 318 bool KItemListController::mouseMoveEvent(QGraphicsSceneMouseEvent* event, const QTransform& transform)
 319 {
 320     if (!m_view) {
 321         return false;
 322     }
 323
 324     if (m_pressedIndex >= 0) {
 325         // Check whether a dragging should be started
 326         if (!m_dragging) {
 327             const QPointF pos = transform.map(event->pos());
 328             const qreal minDragDiff = 4;
 329             m_dragging = qAbs(pos.x() - m_pressedMousePos.x()) >= minDragDiff ||
 330                          qAbs(pos.y() - m_pressedMousePos.y()) >= minDragDiff;
 331             if (m_dragging) {
 332                 startDragging();
 333             }
 334         }
 335     } else {
 336         KItemListRubberBand* rubberBand = m_view->rubberBand();
 337         if (rubberBand->isActive()) {
 338             QPointF endPos = transform.map(event->pos());
 339             if (m_view->scrollOrientation() == Qt::Vertical) {
 340                 endPos.ry() += m_view->offset();
 341                 if (m_view->itemSize().width() < 0) {
 342                     // Use a special rubberband for views that have only one column and
 343                     // expand the rubberband to use the whole width of the view.
 344                     endPos.setX(m_view->size().width());
 345                 }
 346             } else {
 347                 endPos.rx() += m_view->offset();
 348             }
 349             rubberBand->setEndPosition(endPos);
 350         }
 351     }
 352
 353     return false;
 354 }
 355
 356 bool KItemListController::mouseReleaseEvent(QGraphicsSceneMouseEvent* event, const QTransform& transform)
 357 {
 358     if (!m_view) {
 359         return false;
 360     }
 361
 362     KItemListRubberBand* rubberBand = m_view->rubberBand();
 363     if (rubberBand->isActive()) {
 364         disconnect(rubberBand, SIGNAL(endPositionChanged(QPointF,QPointF)), this, SLOT(slotRubberBandChanged()));
 365         rubberBand->setActive(false);
 366         m_oldSelection.clear();
 367     } else {
 368         const QPointF pos = transform.map(event->pos());
 369         const int index = m_view->itemAt(pos);
 370         const bool shiftOrControlPressed = event->modifiers() & Qt::ShiftModifier ||
 371                                            event->modifiers() & Qt::ControlModifier;
 372
 373         if (index >= 0 && index == m_pressedIndex) {
 374             // The release event is done above the same item as the press event
 375             bool emitItemClicked = true;
 376             if (event->button() & Qt::LeftButton) {
 377                 if (m_view->isAboveExpansionToggle(index, pos)) {
 378                     emit itemExpansionToggleClicked(index);
 379                     emitItemClicked = false;
 380                 } else if (shiftOrControlPressed) {
 381                     // The mouse click should only update the selection, not trigger the item
 382                     emitItemClicked = false;
 383                 }
 384             }
 385
 386             if (emitItemClicked) {
 387                 emit itemClicked(index, event->button());
 388             }
 389         } else if (!shiftOrControlPressed) {
 390             m_selectionManager->clearSelection();
 391         }
 392     }
 393
 394     m_dragging = false;
 395     m_pressedMousePos = QPointF();
 396     m_pressedIndex = -1;
 397     return false;
 398 }
 399
 400 bool KItemListController::mouseDoubleClickEvent(QGraphicsSceneMouseEvent* event, const QTransform& transform)
 401 {
 402     Q_UNUSED(event);
 403     Q_UNUSED(transform);
 404     return false;
 405 }
 406
 407 bool KItemListController::dragEnterEvent(QGraphicsSceneDragDropEvent* event, const QTransform& transform)
 408 {
 409     Q_UNUSED(event);
 410     Q_UNUSED(transform);
 411     return false;
 412 }
 413
 414 bool KItemListController::dragLeaveEvent(QGraphicsSceneDragDropEvent* event, const QTransform& transform)
 415 {
 416     Q_UNUSED(event);
 417     Q_UNUSED(transform);
 418     return false;
 419 }
 420
 421 bool KItemListController::dragMoveEvent(QGraphicsSceneDragDropEvent* event, const QTransform& transform)
 422 {
 423     Q_UNUSED(event);
 424     Q_UNUSED(transform);
 425     return false;
 426 }
 427
 428 bool KItemListController::dropEvent(QGraphicsSceneDragDropEvent* event, const QTransform& transform)
 429 {
 430     Q_UNUSED(event);
 431     Q_UNUSED(transform);
 432
 433     m_dragging = false;
 434     return false;
 435 }
 436
 437 bool KItemListController::hoverEnterEvent(QGraphicsSceneHoverEvent* event, const QTransform& transform)
 438 {
 439     Q_UNUSED(event);
 440     Q_UNUSED(transform);
 441     return false;
 442 }
 443
 444 bool KItemListController::hoverMoveEvent(QGraphicsSceneHoverEvent* event, const QTransform& transform)
 445 {
 446     // The implementation assumes that only one item can get hovered no matter
 447     // whether they overlap or not.
 448
 449     Q_UNUSED(transform);
 450     if (!m_model || !m_view) {
 451         return false;
 452     }
 453
 454     // Search the previously hovered item that might get unhovered
 455     KItemListWidget* unhoveredWidget = 0;
 456     foreach (KItemListWidget* widget, m_view->visibleItemListWidgets()) {
 457         if (widget->isHovered()) {
 458             unhoveredWidget = widget;
 459             break;
 460         }
 461     }
 462
 463     // Search the currently hovered item
 464     KItemListWidget* hoveredWidget = 0;
 465     foreach (KItemListWidget* widget, m_view->visibleItemListWidgets()) {
 466         const QPointF mappedPos = widget->mapFromItem(m_view, event->pos());
 467
 468         const bool hovered = widget->contains(mappedPos) &&
 469                              !widget->expansionToggleRect().contains(mappedPos) &&
 470                              !widget->selectionToggleRect().contains(mappedPos);
 471         if (hovered) {
 472             hoveredWidget = widget;
 473             break;
 474         }
 475     }
 476
 477     if (unhoveredWidget != hoveredWidget) {
 478         if (unhoveredWidget) {
 479             unhoveredWidget->setHovered(false);
 480             emit itemUnhovered(unhoveredWidget->index());
 481         }
 482
 483         if (hoveredWidget) {
 484             hoveredWidget->setHovered(true);
 485             emit itemHovered(hoveredWidget->index());
 486         }
 487     }
 488
 489     return false;
 490 }
 491
 492 bool KItemListController::hoverLeaveEvent(QGraphicsSceneHoverEvent* event, const QTransform& transform)
 493 {
 494     Q_UNUSED(event);
 495     Q_UNUSED(transform);
 496
 497     if (!m_model || !m_view) {
 498         return false;
 499     }
 500
 501     foreach (KItemListWidget* widget, m_view->visibleItemListWidgets()) {
 502         if (widget->isHovered()) {
 503             widget->setHovered(false);
 504             emit itemUnhovered(widget->index());
 505         }
 506     }
 507     return false;
 508 }
 509
 510 bool KItemListController::wheelEvent(QGraphicsSceneWheelEvent* event, const QTransform& transform)
 511 {
 512     Q_UNUSED(event);
 513     Q_UNUSED(transform);
 514     return false;
 515 }
 516
 517 bool KItemListController::resizeEvent(QGraphicsSceneResizeEvent* event, const QTransform& transform)
 518 {
 519     Q_UNUSED(event);
 520     Q_UNUSED(transform);
 521     return false;
 522 }
 523
 524 bool KItemListController::processEvent(QEvent* event, const QTransform& transform)
 525 {
 526     if (!event) {
 527         return false;
 528     }
 529
 530     switch (event->type()) {
 531     case QEvent::KeyPress:
 532         return keyPressEvent(static_cast<QKeyEvent*>(event));
 533     case QEvent::InputMethod:
 534         return inputMethodEvent(static_cast<QInputMethodEvent*>(event));
 535     case QEvent::GraphicsSceneMousePress:
 536         return mousePressEvent(static_cast<QGraphicsSceneMouseEvent*>(event), QTransform());
 537     case QEvent::GraphicsSceneMouseMove:
 538         return mouseMoveEvent(static_cast<QGraphicsSceneMouseEvent*>(event), QTransform());
 539     case QEvent::GraphicsSceneMouseRelease:
 540         return mouseReleaseEvent(static_cast<QGraphicsSceneMouseEvent*>(event), QTransform());
 541     case QEvent::GraphicsSceneWheel:
 542          return wheelEvent(static_cast<QGraphicsSceneWheelEvent*>(event), QTransform());
 543     case QEvent::GraphicsSceneDragEnter:
 544         return dragEnterEvent(static_cast<QGraphicsSceneDragDropEvent*>(event), QTransform());
 545     case QEvent::GraphicsSceneDragLeave:
 546         return dragLeaveEvent(static_cast<QGraphicsSceneDragDropEvent*>(event), QTransform());
 547     case QEvent::GraphicsSceneDragMove:
 548         return dragMoveEvent(static_cast<QGraphicsSceneDragDropEvent*>(event), QTransform());
 549     case QEvent::GraphicsSceneDrop:
 550         return dropEvent(static_cast<QGraphicsSceneDragDropEvent*>(event), QTransform());
 551     case QEvent::GraphicsSceneHoverEnter:
 552         return hoverEnterEvent(static_cast<QGraphicsSceneHoverEvent*>(event), QTransform());
 553     case QEvent::GraphicsSceneHoverMove:
 554         return hoverMoveEvent(static_cast<QGraphicsSceneHoverEvent*>(event), QTransform());
 555     case QEvent::GraphicsSceneHoverLeave:
 556         return hoverLeaveEvent(static_cast<QGraphicsSceneHoverEvent*>(event), QTransform());
 557     case QEvent::GraphicsSceneResize:
 558         return resizeEvent(static_cast<QGraphicsSceneResizeEvent*>(event), transform);
 559     default:
 560         break;
 561     }
 562
 563     return false;
 564 }
 565
 566 void KItemListController::slotViewOffsetChanged(qreal current, qreal previous)
 567 {
 568     if (!m_view) {
 569         return;
 570     }
 571
 572     KItemListRubberBand* rubberBand = m_view->rubberBand();
 573     if (rubberBand->isActive()) {
 574         const qreal diff = current - previous;
 575         // TODO: Ideally just QCursor::pos() should be used as
 576         // new end-position but it seems there is no easy way
 577         // to have something like QWidget::mapFromGlobal() for QGraphicsWidget
 578         // (... or I just missed an easy way to do the mapping)
 579         QPointF endPos = rubberBand->endPosition();
 580         if (m_view->scrollOrientation() == Qt::Vertical) {
 581             endPos.ry() += diff;
 582         } else {
 583             endPos.rx() += diff;
 584         }
 585
 586         rubberBand->setEndPosition(endPos);
 587     }
 588 }
 589
 590 void KItemListController::slotRubberBandChanged()
 591 {
 592     if (!m_view || !m_model || m_model->count() <= 0) {
 593         return;
 594     }
 595
 596     const KItemListRubberBand* rubberBand = m_view->rubberBand();
 597     const QPointF startPos = rubberBand->startPosition();
 598     const QPointF endPos = rubberBand->endPosition();
 599     QRectF rubberBandRect = QRectF(startPos, endPos).normalized();
 600
 601     const bool scrollVertical = (m_view->scrollOrientation() == Qt::Vertical);
 602     if (scrollVertical) {
 603         rubberBandRect.translate(0, -m_view->offset());
 604     } else {
 605         rubberBandRect.translate(-m_view->offset(), 0);
 606     }
 607
 608     if (!m_oldSelection.isEmpty()) {
 609         // Clear the old selection that was available before the rubberband has
 610         // been activated in case if no Shift- or Control-key are pressed
 611         const bool shiftOrControlPressed = QApplication::keyboardModifiers() & Qt::ShiftModifier ||
 612                                            QApplication::keyboardModifiers() & Qt::ControlModifier;
 613         if (!shiftOrControlPressed) {
 614             m_oldSelection.clear();
 615         }
 616     }
 617
 618     QSet<int> selectedItems;
 619
 620     // Select all visible items that intersect with the rubberband
 621     foreach (const KItemListWidget* widget, m_view->visibleItemListWidgets()) {
 622         const int index = widget->index();
 623
 624         const QRectF widgetRect = m_view->itemBoundingRect(index);
 625         if (widgetRect.intersects(rubberBandRect)) {
 626             const QRectF iconRect = widget->iconBoundingRect().translated(widgetRect.topLeft());
 627             const QRectF textRect = widget->textBoundingRect().translated(widgetRect.topLeft());
 628             if (iconRect.intersects(rubberBandRect) || textRect.intersects(rubberBandRect)) {
 629                 selectedItems.insert(index);
 630             }
 631         }
 632     }
 633
 634     // Select all invisible items that intersect with the rubberband. Instead of
 635     // iterating all items only the area which might be touched by the rubberband
 636     // will be checked.
 637     const bool increaseIndex = scrollVertical ?
 638                                startPos.y() > endPos.y(): startPos.x() > endPos.x();
 639
 640     int index = increaseIndex ? m_view->lastVisibleIndex() + 1 : m_view->firstVisibleIndex() - 1;
 641     bool selectionFinished = false;
 642     do {
 643         const QRectF widgetRect = m_view->itemBoundingRect(index);
 644         if (widgetRect.intersects(rubberBandRect)) {
 645             selectedItems.insert(index);
 646         }
 647
 648         if (increaseIndex) {
 649             ++index;
 650             selectionFinished = (index >= m_model->count()) ||
 651                                 ( scrollVertical && widgetRect.top()  > rubberBandRect.bottom()) ||
 652                                 (!scrollVertical && widgetRect.left() > rubberBandRect.right());
 653         } else {
 654             --index;
 655             selectionFinished = (index < 0) ||
 656                                 ( scrollVertical && widgetRect.bottom() < rubberBandRect.top()) ||
 657                                 (!scrollVertical && widgetRect.right()  < rubberBandRect.left());
 658         }
 659     } while (!selectionFinished);
 660
 661     m_selectionManager->setSelectedItems(selectedItems + m_oldSelection);
 662 }
 663
 664 QPixmap KItemListController::createDragPixmap(const QSet<int>& indexes) const
 665 {
 666     if (!m_model || !m_view) {
 667         return QPixmap();
 668     }
 669
 670     // TODO: The current hack assumes a property "iconPixmap" in the model. The method
 671     // will get an interface of KFileItemList later.
 672     QSetIterator<int> it(indexes);
 673     while (it.hasNext()) {
 674         const int index = it.next();
 675         // TODO: Only one item is considered currently
 676         QPixmap pixmap = m_model->data(index).value("iconPixmap").value<QPixmap>();
 677         if (pixmap.isNull()) {
 678             KIcon icon(m_model->data(index).value("iconName").toString());
 679             const QSizeF size = m_view->itemSize();
 680             pixmap = icon.pixmap(size.toSize());
 681         }
 682         return pixmap;
 683     }
 684
 685     return QPixmap();
 686 }
 687
 688 QMimeData* KItemListController::createMimeData(const QSet<int>& indexes) const
 689 {
 690     if (!m_model) {
 691         return 0;
 692     }
 693
 694     QMimeData* data = new QMimeData();
 695
 696     // TODO: Check KDirModel::mimeData() for a good reference implementation
 697     KUrl::List urls;
 698     QSetIterator<int> it(indexes);
 699     while (it.hasNext()) {
 700         const int index = it.next();
 701         // TODO: Big hack to use KFileItemModel here. Remove after moving mimeData()
 702         // into KFileItemModel.
 703         KFileItemModel* model = qobject_cast<KFileItemModel*>(m_model);
 704         Q_ASSERT(model);
 705         const KUrl url = model->fileItem(index).url();
 706         urls.append(url);
 707     }
 708
 709     urls.populateMimeData(data);
 710
 711     return data;
 712 }
 713
 714 void KItemListController::startDragging()
 715 {
 716     // The created drag object will be owned and deleted
 717     // by QApplication::activeWindow().
 718     QDrag* drag = new QDrag(QApplication::activeWindow());
 719
 720     const QSet<int> selectedItems = m_selectionManager->selectedItems();
 721
 722     const QPixmap pixmap = createDragPixmap(selectedItems);
 723     drag->setPixmap(pixmap);
 724
 725     QMimeData* data = createMimeData(selectedItems);
 726     drag->setMimeData(data);
 727
 728     drag->exec(Qt::MoveAction | Qt::CopyAction | Qt::LinkAction, Qt::IgnoreAction);
 729 }
 730
 731 #include "kitemlistcontroller.moc"