src/klistview.cpp

   1 /**
   2   * This file is part of the KDE project
   3   * Copyright (C) 2007 Rafael Fernández López <ereslibre@gmail.com>
   4   *
   5   * This library is free software; you can redistribute it and/or
   6   * modify it under the terms of the GNU Library General Public
   7   * License as published by the Free Software Foundation; either
   8   * version 2 of the License, or (at your option) any later version.
   9   *
  10   * This library is distributed in the hope that it will be useful,
  11   * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13   * Library General Public License for more details.
  14   *
  15   * You should have received a copy of the GNU Library General Public License
  16   * along with this library; see the file COPYING.LIB.  If not, write to
  17   * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  18   * Boston, MA 02110-1301, USA.
  19   */
  20
  21 #include "klistview.h"
  22 #include "klistview_p.h"
  23
  24 #include <math.h> // trunc on C99 compliant systems
  25 #include <kdefakes.h> // trunc for not C99 compliant systems
  26
  27 #include <QApplication>
  28 #include <QPainter>
  29 #include <QScrollBar>
  30 #include <QPaintEvent>
  31
  32 #include <kdebug.h>
  33 #include <kstyle.h>
  34
  35 #include "kitemcategorizer.h"
  36 #include "ksortfilterproxymodel.h"
  37
  38 class LessThan
  39 {
  40 public:
  41     enum Purpose
  42     {
  43         GeneralPurpose = 0,
  44         CategoryPurpose
  45     };
  46
  47     inline LessThan(const KSortFilterProxyModel *proxyModel,
  48                     Purpose purpose)
  49         : proxyModel(proxyModel)
  50         , purpose(purpose)
  51     {
  52     }
  53
  54     inline bool operator()(const QModelIndex &left,
  55                            const QModelIndex &right) const
  56     {
  57         if (purpose == GeneralPurpose)
  58         {
  59             return proxyModel->sortOrder() == Qt::AscendingOrder ?
  60                    proxyModel->lessThanGeneralPurpose(left, right) :
  61                    !proxyModel->lessThanGeneralPurpose(left, right);
  62         }
  63
  64         return proxyModel->sortOrder() == Qt::AscendingOrder ?
  65                proxyModel->lessThanCategoryPurpose(left, right) :
  66                !proxyModel->lessThanCategoryPurpose(left, right);
  67     }
  68
  69 private:
  70     const KSortFilterProxyModel *proxyModel;
  71     const Purpose purpose;
  72 };
  73
  74
  75 //==============================================================================
  76
  77
  78 KListView::Private::Private(KListView *listView)
  79     : listView(listView)
  80     , itemCategorizer(0)
  81     , mouseButtonPressed(false)
  82     , isDragging(false)
  83     , dragLeftViewport(false)
  84     , proxyModel(0)
  85     , lastIndex(QModelIndex())
  86 {
  87 }
  88
  89 KListView::Private::~Private()
  90 {
  91 }
  92
  93 const QModelIndexList &KListView::Private::intersectionSet(const QRect &rect)
  94 {
  95     QModelIndex index;
  96     QRect indexVisualRect;
  97
  98     intersectedIndexes.clear();
  99
 100     // Lets find out where we should start
 101     int top = proxyModel->rowCount() - 1;
 102     int bottom = 0;
 103     int middle = (top + bottom) / 2;
 104     while (bottom <= top)
 105     {
 106         middle = (top + bottom) / 2;
 107
 108         index = elementDictionary[proxyModel->index(middle, 0)];
 109         indexVisualRect = visualRect(index);
 110
 111         if (qMax(indexVisualRect.topLeft().y(),
 112                  indexVisualRect.bottomRight().y()) < qMin(rect.topLeft().y(),
 113                                                         rect.bottomRight().y()))
 114         {
 115             bottom = middle + 1;
 116         }
 117         else
 118         {
 119             top = middle - 1;
 120         }
 121     }
 122
 123     for (int i = middle; i < proxyModel->rowCount(); i++)
 124     {
 125         index = elementDictionary[proxyModel->index(i, 0)];
 126         indexVisualRect = visualRect(index);
 127
 128         if (rect.intersects(indexVisualRect))
 129             intersectedIndexes.append(index);
 130
 131         // If we passed next item, stop searching for hits
 132         if (qMax(rect.bottomRight().y(), rect.topLeft().y()) <
 133                                                   qMin(indexVisualRect.topLeft().y(),
 134                                                        indexVisualRect.bottomRight().y()))
 135             break;
 136     }
 137
 138     return intersectedIndexes;
 139 }
 140
 141 QRect KListView::Private::visualRectInViewport(const QModelIndex &index) const
 142 {
 143     if (!index.isValid())
 144         return QRect();
 145
 146     QString curCategory = elementsInfo[index].category;
 147
 148     QRect retRect(listView->spacing(), listView->spacing() * 2 +
 149                        30 /* categoryHeight */, 0, 0);
 150
 151     int viewportWidth = listView->viewport()->width() - listView->spacing();
 152
 153     // We really need all items to be of same size. Otherwise we cannot do this
 154     // (ereslibre)
 155     // QSize itemSize =
 156     //             listView->sizeHintForIndex(proxyModel->mapFromSource(index));
 157     // int itemHeight = itemSize.height();
 158     // int itemWidth = itemSize.width();*/
 159     int itemHeight = 107;
 160     int itemWidth = 130;
 161     int itemWidthPlusSeparation = listView->spacing() + itemWidth;
 162     int elementsPerRow = viewportWidth / itemWidthPlusSeparation;
 163     if (!elementsPerRow)
 164         elementsPerRow++;
 165
 166     int column = elementsInfo[index].relativeOffsetToCategory % elementsPerRow;
 167     int row = elementsInfo[index].relativeOffsetToCategory / elementsPerRow;
 168
 169     retRect.setLeft(retRect.left() + column * listView->spacing() +
 170                     column * itemWidth);
 171
 172     float rows;
 173     int rowsInt;
 174     foreach (const QString &category, categories)
 175     {
 176         if (category == curCategory)
 177             break;
 178
 179         rows = (float) ((float) categoriesIndexes[category].count() /
 180                         (float) elementsPerRow);
 181         rowsInt = categoriesIndexes[category].count() / elementsPerRow;
 182
 183         if (rows - trunc(rows)) rowsInt++;
 184
 185         retRect.setTop(retRect.top() +
 186                        (rowsInt * listView->spacing()) +
 187                        (rowsInt * itemHeight) +
 188                        30 /* categoryHeight */ +
 189                        listView->spacing() * 2);
 190     }
 191
 192     retRect.setTop(retRect.top() + row * listView->spacing() +
 193                    row * itemHeight);
 194
 195     retRect.setWidth(itemWidth);
 196     retRect.setHeight(itemHeight);
 197
 198     return retRect;
 199 }
 200
 201 QRect KListView::Private::visualCategoryRectInViewport(const QString &category)
 202                                                                            const
 203 {
 204     QRect retRect(listView->spacing(),
 205                   listView->spacing(),
 206                   listView->viewport()->width() - listView->spacing() * 2,
 207                   0);
 208
 209     if (!proxyModel->rowCount() || !categories.contains(category))
 210         return QRect();
 211
 212     QModelIndex index = proxyModel->index(0, 0, QModelIndex());
 213
 214     int viewportWidth = listView->viewport()->width() - listView->spacing();
 215
 216     // We really need all items to be of same size. Otherwise we cannot do this
 217     // (ereslibre)
 218     // QSize itemSize = listView->sizeHintForIndex(index);
 219     // int itemHeight = itemSize.height();
 220     // int itemWidth = itemSize.width();
 221     int itemHeight = 107;
 222     int itemWidth = 130;
 223     int itemWidthPlusSeparation = listView->spacing() + itemWidth;
 224     int elementsPerRow = viewportWidth / itemWidthPlusSeparation;
 225
 226     if (!elementsPerRow)
 227         elementsPerRow++;
 228
 229     float rows;
 230     int rowsInt;
 231     foreach (const QString &itCategory, categories)
 232     {
 233         if (itCategory == category)
 234             break;
 235
 236         rows = (float) ((float) categoriesIndexes[itCategory].count() /
 237                         (float) elementsPerRow);
 238         rowsInt = categoriesIndexes[itCategory].count() / elementsPerRow;
 239
 240         if (rows - trunc(rows)) rowsInt++;
 241
 242         retRect.setTop(retRect.top() +
 243                        (rowsInt * listView->spacing()) +
 244                        (rowsInt * itemHeight) +
 245                        30 /* categoryHeight */ +
 246                        listView->spacing() * 2);
 247     }
 248
 249     retRect.setHeight(30 /* categoryHeight */);
 250
 251     return retRect;
 252 }
 253
 254 // We're sure elementsPosition doesn't contain index
 255 const QRect &KListView::Private::cacheIndex(const QModelIndex &index)
 256 {
 257     QRect rect = visualRectInViewport(index);
 258     elementsPosition[index] = rect;
 259
 260     return elementsPosition[index];
 261 }
 262
 263 // We're sure categoriesPosition doesn't contain category
 264 const QRect &KListView::Private::cacheCategory(const QString &category)
 265 {
 266     QRect rect = visualCategoryRectInViewport(category);
 267     categoriesPosition[category] = rect;
 268
 269     return categoriesPosition[category];
 270 }
 271
 272 const QRect &KListView::Private::cachedRectIndex(const QModelIndex &index)
 273 {
 274     if (elementsPosition.contains(index)) // If we have it cached
 275     {                                        // return it
 276         return elementsPosition[index];
 277     }
 278     else                                     // Otherwise, cache it
 279     {                                        // and return it
 280         return cacheIndex(index);
 281     }
 282 }
 283
 284 const QRect &KListView::Private::cachedRectCategory(const QString &category)
 285 {
 286     if (categoriesPosition.contains(category)) // If we have it cached
 287     {                                                // return it
 288         return categoriesPosition[category];
 289     }
 290     else                                            // Otherwise, cache it and
 291     {                                               // return it
 292         return cacheCategory(category);
 293     }
 294 }
 295
 296 QRect KListView::Private::visualRect(const QModelIndex &index)
 297 {
 298     QModelIndex mappedIndex = proxyModel->mapToSource(index);
 299
 300     QRect retRect = cachedRectIndex(mappedIndex);
 301     int dx = -listView->horizontalOffset();
 302     int dy = -listView->verticalOffset();
 303     retRect.adjust(dx, dy, dx, dy);
 304
 305     return retRect;
 306 }
 307
 308 QRect KListView::Private::categoryVisualRect(const QString &category)
 309 {
 310     QRect retRect = cachedRectCategory(category);
 311     int dx = -listView->horizontalOffset();
 312     int dy = -listView->verticalOffset();
 313     retRect.adjust(dx, dy, dx, dy);
 314
 315     return retRect;
 316 }
 317
 318 void KListView::Private::drawNewCategory(const QString &category,
 319                                          const QStyleOption &option,
 320                                          QPainter *painter)
 321 {
 322     QColor color = option.palette.color(QPalette::Text);
 323
 324     painter->save();
 325     painter->setRenderHint(QPainter::Antialiasing);
 326
 327     QStyleOptionButton opt;
 328
 329     opt.rect = option.rect;
 330     opt.palette = option.palette;
 331     opt.direction = option.direction;
 332     opt.text = category;
 333
 334     if ((category == hoveredCategory) && !mouseButtonPressed)
 335     {
 336         const QPalette::ColorGroup group =
 337                                           option.state & QStyle::State_Enabled ?
 338                                           QPalette::Normal : QPalette::Disabled;
 339
 340         QLinearGradient gradient(option.rect.topLeft(),
 341                                  option.rect.bottomRight());
 342         gradient.setColorAt(0,
 343                             option.palette.color(group,
 344                                                  QPalette::Highlight).light());
 345         gradient.setColorAt(1, Qt::transparent);
 346
 347         painter->fillRect(option.rect, gradient);
 348     }
 349
 350     /*if (const KStyle *style = dynamic_cast<const KStyle*>(QApplication::style()))
 351         {
 352         style->drawControl(KStyle::CE_Category, &opt, painter, this);
 353         }
 354     else
 355     {*/
 356         QFont painterFont = painter->font();
 357         painterFont.setWeight(QFont::Bold);
 358         QFontMetrics metrics(painterFont);
 359         painter->setFont(painterFont);
 360
 361         QPainterPath path;
 362         path.addRect(option.rect.left(),
 363                      option.rect.bottom() - 2,
 364                      option.rect.width(),
 365                      2);
 366
 367         QLinearGradient gradient(option.rect.topLeft(),
 368                                  option.rect.bottomRight());
 369         gradient.setColorAt(0, color);
 370         gradient.setColorAt(1, Qt::transparent);
 371
 372         painter->setBrush(gradient);
 373         painter->fillPath(path, gradient);
 374
 375         painter->setPen(color);
 376
 377         painter->drawText(option.rect, Qt::AlignVCenter | Qt::AlignLeft,
 378              metrics.elidedText(category, Qt::ElideRight, option.rect.width()));
 379     //}
 380     painter->restore();
 381 }
 382
 383
 384 void KListView::Private::updateScrollbars()
 385 {
 386     int lastItemBottom = cachedRectIndex(lastIndex).bottom() +
 387                            listView->spacing() - listView->viewport()->height();
 388
 389     listView->verticalScrollBar()->setSingleStep(listView->viewport()->height() / 10);
 390     listView->verticalScrollBar()->setPageStep(listView->viewport()->height());
 391     listView->verticalScrollBar()->setRange(0, lastItemBottom);
 392 }
 393
 394 void KListView::Private::drawDraggedItems(QPainter *painter)
 395 {
 396     QStyleOptionViewItemV3 option = listView->viewOptions();
 397     option.state &= ~QStyle::State_MouseOver;
 398     int dx;
 399     int dy;
 400     foreach (const QModelIndex &index, listView->selectionModel()->selectedIndexes())
 401     {
 402         dx = mousePosition.x() - initialPressPosition.x() + listView->horizontalOffset();
 403         dy = mousePosition.y() - initialPressPosition.y() + listView->verticalOffset();
 404
 405         option.rect = visualRect(index);
 406         option.rect.adjust(dx, dy, dx, dy);
 407
 408         listView->itemDelegate(index)->paint(painter, option, index);
 409     }
 410 }
 411
 412 void KListView::Private::drawDraggedItems()
 413 {
 414     int dx;
 415     int dy;
 416     QRect rectToUpdate;
 417     QRect currentRect;
 418     foreach (const QModelIndex &index, listView->selectionModel()->selectedIndexes())
 419     {
 420         dx = mousePosition.x() - initialPressPosition.x() + listView->horizontalOffset();
 421         dy = mousePosition.y() - initialPressPosition.y() + listView->verticalOffset();
 422
 423         currentRect = visualRect(index);
 424         currentRect.adjust(dx, dy, dx, dy);
 425
 426         rectToUpdate = rectToUpdate.united(currentRect);
 427     }
 428
 429     listView->viewport()->update(lastDraggedItemsRect);
 430
 431     lastDraggedItemsRect = rectToUpdate;
 432
 433     listView->viewport()->update(rectToUpdate);
 434 }
 435
 436
 437 //==============================================================================
 438
 439
 440 KListView::KListView(QWidget *parent)
 441     : QListView(parent)
 442     , d(new Private(this))
 443 {
 444 }
 445
 446 KListView::~KListView()
 447 {
 448     delete d;
 449 }
 450
 451 void KListView::setModel(QAbstractItemModel *model)
 452 {
 453     if (d->proxyModel)
 454     {
 455         QObject::disconnect(d->proxyModel,
 456                             SIGNAL(rowsRemoved(QModelIndex,int,int)),
 457                             this, SLOT(rowsRemoved(QModelIndex,int,int)));
 458
 459         QObject::disconnect(d->proxyModel,
 460                             SIGNAL(sortingRoleChanged()),
 461                             this, SLOT(slotSortingRoleChanged()));
 462     }
 463
 464     QListView::setModel(model);
 465
 466     d->proxyModel = dynamic_cast<KSortFilterProxyModel*>(model);
 467
 468     if (d->proxyModel)
 469     {
 470         QObject::connect(d->proxyModel,
 471                          SIGNAL(rowsRemoved(QModelIndex,int,int)),
 472                          this, SLOT(rowsRemoved(QModelIndex,int,int)));
 473
 474         QObject::connect(d->proxyModel,
 475                          SIGNAL(sortingRoleChanged()),
 476                          this, SLOT(slotSortingRoleChanged()));
 477     }
 478 }
 479
 480 QRect KListView::visualRect(const QModelIndex &index) const
 481 {
 482     if ((viewMode() != KListView::IconMode) || !d->proxyModel ||
 483         !d->itemCategorizer)
 484     {
 485         return QListView::visualRect(index);
 486     }
 487
 488     if (!qobject_cast<const QSortFilterProxyModel*>(index.model()))
 489     {
 490         return d->visualRect(d->proxyModel->mapFromSource(index));
 491     }
 492
 493     return d->visualRect(index);
 494 }
 495
 496 KItemCategorizer *KListView::itemCategorizer() const
 497 {
 498     return d->itemCategorizer;
 499 }
 500
 501 void KListView::setItemCategorizer(KItemCategorizer *itemCategorizer)
 502 {
 503     if (!itemCategorizer && d->proxyModel)
 504     {
 505         QObject::disconnect(d->proxyModel,
 506                             SIGNAL(rowsRemoved(QModelIndex,int,int)),
 507                             this, SLOT(rowsRemoved(QModelIndex,int,int)));
 508
 509         QObject::disconnect(d->proxyModel,
 510                             SIGNAL(sortingRoleChanged()),
 511                             this, SLOT(slotSortingRoleChanged()));
 512     }
 513     else if (itemCategorizer && d->proxyModel)
 514     {
 515         QObject::connect(d->proxyModel,
 516                          SIGNAL(rowsRemoved(QModelIndex,int,int)),
 517                          this, SLOT(rowsRemoved(QModelIndex,int,int)));
 518
 519         QObject::connect(d->proxyModel,
 520                          SIGNAL(sortingRoleChanged()),
 521                          this, SLOT(slotSortingRoleChanged()));
 522     }
 523
 524     d->itemCategorizer = itemCategorizer;
 525
 526     if (itemCategorizer)
 527     {
 528         rowsInserted(QModelIndex(), 0, d->proxyModel->rowCount() - 1);
 529     }
 530     else
 531     {
 532         updateGeometries();
 533     }
 534 }
 535
 536 QModelIndex KListView::indexAt(const QPoint &point) const
 537 {
 538     if ((viewMode() != KListView::IconMode) || !d->proxyModel ||
 539         !d->itemCategorizer)
 540     {
 541         return QListView::indexAt(point);
 542     }
 543
 544     QModelIndex index;
 545
 546     QModelIndexList item = d->intersectionSet(QRect(point, point));
 547
 548     if (item.count() == 1)
 549     {
 550         index = item[0];
 551     }
 552
 553     d->hovered = index;
 554
 555     return index;
 556 }
 557
 558 void KListView::reset()
 559 {
 560     QListView::reset();
 561
 562     if ((viewMode() != KListView::IconMode) || !d->proxyModel ||
 563         !d->itemCategorizer)
 564     {
 565         return;
 566     }
 567
 568     d->elementsInfo.clear();
 569     d->elementsPosition.clear();
 570     d->elementDictionary.clear();
 571     d->categoriesIndexes.clear();
 572     d->categoriesPosition.clear();
 573     d->categories.clear();
 574     d->intersectedIndexes.clear();
 575     d->sourceModelIndexList.clear();
 576     d->hovered = QModelIndex();
 577     d->mouseButtonPressed = false;
 578 }
 579
 580 void KListView::paintEvent(QPaintEvent *event)
 581 {
 582     if ((viewMode() != KListView::IconMode) || !d->proxyModel ||
 583         !d->itemCategorizer)
 584     {
 585         QListView::paintEvent(event);
 586         return;
 587     }
 588
 589     QStyleOptionViewItemV3 option = viewOptions();
 590     QPainter painter(viewport());
 591     QRect area = event->rect();
 592     const bool focus = (hasFocus() || viewport()->hasFocus()) &&
 593                         currentIndex().isValid();
 594     const QStyle::State state = option.state;
 595     const bool enabled = (state & QStyle::State_Enabled) != 0;
 596
 597     painter.save();
 598
 599     QModelIndexList dirtyIndexes = d->intersectionSet(area);
 600     foreach (const QModelIndex &index, dirtyIndexes)
 601     {
 602         option.state = state;
 603         option.rect = d->visualRect(index);
 604
 605         if (selectionModel() && selectionModel()->isSelected(index))
 606         {
 607             option.state |= QStyle::State_Selected;
 608         }
 609
 610         if (enabled)
 611         {
 612             QPalette::ColorGroup cg;
 613             if ((d->proxyModel->flags(index) & Qt::ItemIsEnabled) == 0)
 614             {
 615                 option.state &= ~QStyle::State_Enabled;
 616                 cg = QPalette::Disabled;
 617             }
 618             else
 619             {
 620                 cg = QPalette::Normal;
 621             }
 622             option.palette.setCurrentColorGroup(cg);
 623         }
 624
 625         if (focus && currentIndex() == index)
 626         {
 627             option.state |= QStyle::State_HasFocus;
 628             if (this->state() == EditingState)
 629                 option.state |= QStyle::State_Editing;
 630         }
 631
 632         if ((index == d->hovered) && !d->mouseButtonPressed)
 633             option.state |= QStyle::State_MouseOver;
 634         else
 635             option.state &= ~QStyle::State_MouseOver;
 636
 637         itemDelegate(index)->paint(&painter, option, index);
 638     }
 639
 640     if (d->mouseButtonPressed && !d->isDragging)
 641     {
 642         QPoint start, end, initialPressPosition;
 643
 644         initialPressPosition = d->initialPressPosition;
 645
 646         initialPressPosition.setY(initialPressPosition.y() - verticalOffset());
 647         initialPressPosition.setX(initialPressPosition.x() - horizontalOffset());
 648
 649         if (d->initialPressPosition.x() > d->mousePosition.x() ||
 650             d->initialPressPosition.y() > d->mousePosition.y())
 651         {
 652             start = d->mousePosition;
 653             end = initialPressPosition;
 654         }
 655         else
 656         {
 657             start = initialPressPosition;
 658             end = d->mousePosition;
 659         }
 660
 661         QStyleOptionRubberBand yetAnotherOption;
 662         yetAnotherOption.initFrom(this);
 663         yetAnotherOption.shape = QRubberBand::Rectangle;
 664         yetAnotherOption.opaque = false;
 665         yetAnotherOption.rect = QRect(start, end).intersected(viewport()->rect().adjusted(-16, -16, 16, 16));
 666         painter.save();
 667         style()->drawControl(QStyle::CE_RubberBand, &yetAnotherOption, &painter);
 668         painter.restore();
 669     }
 670
 671     // Redraw categories
 672     QStyleOptionViewItem otherOption;
 673     foreach (const QString &category, d->categories)
 674     {
 675         otherOption = option;
 676         otherOption.rect = d->categoryVisualRect(category);
 677
 678         if (otherOption.rect.intersects(area))
 679         {
 680             d->drawNewCategory(category, otherOption, &painter);
 681         }
 682     }
 683
 684     if (d->isDragging && !d->dragLeftViewport)
 685     {
 686         painter.setOpacity(0.5);
 687         d->drawDraggedItems(&painter);
 688     }
 689
 690     painter.restore();
 691 }
 692
 693 void KListView::resizeEvent(QResizeEvent *event)
 694 {
 695     QListView::resizeEvent(event);
 696
 697     if ((viewMode() != KListView::IconMode) || !d->proxyModel ||
 698         !d->itemCategorizer)
 699     {
 700         return;
 701     }
 702
 703     // Clear the items positions cache
 704     d->elementsPosition.clear();
 705     d->categoriesPosition.clear();
 706
 707     d->updateScrollbars();
 708 }
 709
 710 void KListView::setSelection(const QRect &rect,
 711                              QItemSelectionModel::SelectionFlags flags)
 712 {
 713     if ((viewMode() != KListView::IconMode) || !d->proxyModel ||
 714         !d->itemCategorizer)
 715     {
 716         QListView::setSelection(rect, flags);
 717         return;
 718     }
 719
 720     if (!flags)
 721         return;
 722
 723     selectionModel()->clear();
 724
 725     if (flags & QItemSelectionModel::Clear)
 726     {
 727         d->lastSelection = QItemSelection();
 728     }
 729
 730     QModelIndexList dirtyIndexes = d->intersectionSet(rect);
 731     QItemSelection selection;
 732
 733     if (!dirtyIndexes.count())
 734     {
 735         if (d->lastSelection.count())
 736         {
 737             selectionModel()->select(d->lastSelection, flags);
 738         }
 739
 740         return;
 741     }
 742
 743     if (!d->mouseButtonPressed)
 744     {
 745         selection = QItemSelection(dirtyIndexes[0], dirtyIndexes[0]);
 746     }
 747     else
 748     {
 749         QModelIndex first = dirtyIndexes[0];
 750         QModelIndex last;
 751         foreach (const QModelIndex &index, dirtyIndexes)
 752         {
 753             if (last.isValid() && last.row() + 1 != index.row())
 754             {
 755                 QItemSelectionRange range(first, last);
 756
 757                 selection << range;
 758
 759                 first = index;
 760             }
 761
 762             last = index;
 763         }
 764
 765         if (last.isValid())
 766             selection << QItemSelectionRange(first, last);
 767     }
 768
 769     if (d->lastSelection.count() && !d->mouseButtonPressed)
 770     {
 771         selection.merge(d->lastSelection, flags);
 772     }
 773     else if (d->lastSelection.count())
 774     {
 775         selection.merge(d->lastSelection, QItemSelectionModel::Select);
 776     }
 777
 778     selectionModel()->select(selection, flags);
 779 }
 780
 781 void KListView::mouseMoveEvent(QMouseEvent *event)
 782 {
 783     QListView::mouseMoveEvent(event);
 784
 785     if ((viewMode() != KListView::IconMode) || !d->proxyModel ||
 786         !d->itemCategorizer)
 787     {
 788         return;
 789     }
 790
 791     d->mousePosition = event->pos();
 792     d->hoveredCategory = QString();
 793
 794     // Redraw categories
 795     foreach (const QString &category, d->categories)
 796     {
 797         if (d->categoryVisualRect(category).intersects(QRect(event->pos(), event->pos())))
 798         {
 799             d->hoveredCategory = category;
 800         }
 801
 802         viewport()->update(d->categoryVisualRect(category));
 803     }
 804
 805     QRect rect;
 806     if (d->mouseButtonPressed && !d->isDragging)
 807     {
 808         QPoint start, end, initialPressPosition;
 809
 810         initialPressPosition = d->initialPressPosition;
 811
 812         initialPressPosition.setY(initialPressPosition.y() - verticalOffset());
 813         initialPressPosition.setX(initialPressPosition.x() - horizontalOffset());
 814
 815         if (d->initialPressPosition.x() > d->mousePosition.x() ||
 816             d->initialPressPosition.y() > d->mousePosition.y())
 817         {
 818             start = d->mousePosition;
 819             end = initialPressPosition;
 820         }
 821         else
 822         {
 823             start = initialPressPosition;
 824             end = d->mousePosition;
 825         }
 826
 827         viewport()->update(d->lastSelectionRect);
 828
 829         rect = QRect(start, end).intersected(viewport()->rect().adjusted(-16, -16, 16, 16));
 830
 831         viewport()->update(rect);
 832
 833         d->lastSelectionRect = rect;
 834     }
 835 }
 836
 837 void KListView::mousePressEvent(QMouseEvent *event)
 838 {
 839     QListView::mousePressEvent(event);
 840
 841     if ((viewMode() != KListView::IconMode) || !d->proxyModel ||
 842         !d->itemCategorizer)
 843     {
 844         return;
 845     }
 846
 847     d->dragLeftViewport = false;
 848
 849     if (event->button() == Qt::LeftButton)
 850     {
 851         d->mouseButtonPressed = true;
 852
 853         d->initialPressPosition = event->pos();
 854         d->initialPressPosition.setY(d->initialPressPosition.y() +
 855                                                               verticalOffset());
 856         d->initialPressPosition.setX(d->initialPressPosition.x() +
 857                                                             horizontalOffset());
 858     }
 859 }
 860
 861 void KListView::mouseReleaseEvent(QMouseEvent *event)
 862 {
 863     QListView::mouseReleaseEvent(event);
 864
 865     if ((viewMode() != KListView::IconMode) || !d->proxyModel ||
 866         !d->itemCategorizer)
 867     {
 868         return;
 869     }
 870
 871     d->mouseButtonPressed = false;
 872
 873     QPoint initialPressPosition = viewport()->mapFromGlobal(QCursor::pos());
 874     initialPressPosition.setY(initialPressPosition.y() + verticalOffset());
 875     initialPressPosition.setX(initialPressPosition.x() + horizontalOffset());
 876
 877     QItemSelection selection;
 878
 879     if (initialPressPosition == d->initialPressPosition)
 880     {
 881         foreach(const QString &category, d->categories)
 882         {
 883             if (d->categoryVisualRect(category).contains(event->pos()))
 884             {
 885                 QItemSelectionRange selectionRange(d->proxyModel->mapFromSource(d->categoriesIndexes[category][0]),
 886                                                    d->proxyModel->mapFromSource(d->categoriesIndexes[category][d->categoriesIndexes[category].count() - 1]));
 887
 888                 selection << selectionRange;
 889
 890                 selectionModel()->select(selection, QItemSelectionModel::Select);
 891
 892                 break;
 893             }
 894         }
 895     }
 896
 897     d->lastSelection = selectionModel()->selection();
 898
 899     if (d->hovered.isValid())
 900         viewport()->update(d->visualRect(d->hovered));
 901     else if (!d->hoveredCategory.isEmpty())
 902         viewport()->update(d->categoryVisualRect(d->hoveredCategory));
 903 }
 904
 905 void KListView::leaveEvent(QEvent *event)
 906 {
 907     QListView::leaveEvent(event);
 908
 909     if ((viewMode() != KListView::IconMode) || !d->proxyModel ||
 910         !d->itemCategorizer)
 911     {
 912         return;
 913     }
 914
 915     d->hovered = QModelIndex();
 916     d->hoveredCategory = QString();
 917 }
 918
 919 void KListView::startDrag(Qt::DropActions supportedActions)
 920 {
 921     QListView::startDrag(supportedActions);
 922
 923     d->isDragging = false;
 924     d->mouseButtonPressed = false;
 925 }
 926
 927 void KListView::dragMoveEvent(QDragMoveEvent *event)
 928 {
 929     if ((viewMode() != KListView::IconMode) || !d->proxyModel ||
 930         !d->itemCategorizer)
 931     {
 932         QListView::dragMoveEvent(event);
 933         return;
 934     }
 935
 936     d->mousePosition = event->pos();
 937
 938     if (d->mouseButtonPressed)
 939     {
 940         d->isDragging = true;
 941     }
 942     else
 943     {
 944         d->isDragging = false;
 945     }
 946
 947     d->dragLeftViewport = false;
 948
 949     d->drawDraggedItems();
 950 }
 951
 952 void KListView::dragLeaveEvent(QDragLeaveEvent *event)
 953 {
 954     QListView::dragLeaveEvent(event);
 955
 956     if ((viewMode() != KListView::IconMode) || !d->proxyModel ||
 957         !d->itemCategorizer)
 958     {
 959         return;
 960     }
 961
 962     d->dragLeftViewport = true;
 963 }
 964
 965 QModelIndex KListView::moveCursor(CursorAction cursorAction,
 966                                   Qt::KeyboardModifiers modifiers)
 967 {
 968     if ((viewMode() != KListView::IconMode) || !d->proxyModel ||
 969         !d->itemCategorizer)
 970     {
 971         return QListView::moveCursor(cursorAction, modifiers);
 972     }
 973
 974     return QListView::moveCursor(cursorAction, modifiers);
 975 }
 976
 977 void KListView::rowsInserted(const QModelIndex &parent,
 978                              int start,
 979                              int end)
 980 {
 981     QListView::rowsInserted(parent, start, end);
 982
 983     if ((viewMode() != KListView::IconMode) || !d->proxyModel ||
 984         !d->itemCategorizer)
 985     {
 986         return;
 987     }
 988
 989     rowsInsertedArtifficial(parent, start, end);
 990 }
 991
 992 void KListView::rowsInsertedArtifficial(const QModelIndex &parent,
 993                                         int start,
 994                                         int end)
 995 {
 996     d->lastSelection = QItemSelection();
 997     d->elementsInfo.clear();
 998     d->elementsPosition.clear();
 999     d->elementDictionary.clear();
1000     d->categoriesIndexes.clear();
1001     d->categoriesPosition.clear();
1002     d->categories.clear();
1003     d->intersectedIndexes.clear();
1004     d->sourceModelIndexList.clear();
1005     d->hovered = QModelIndex();
1006     d->mouseButtonPressed = false;
1007
1008     if (start > end || end < 0 || start < 0 || !d->proxyModel->rowCount())
1009     {
1010         return;
1011     }
1012
1013     // Add all elements mapped to the source model
1014     for (int k = 0; k < d->proxyModel->rowCount(); k++)
1015     {
1016         d->sourceModelIndexList <<
1017                          d->proxyModel->mapToSource(d->proxyModel->index(k, 0));
1018     }
1019
1020     // Sort them with the general purpose lessThan method
1021     LessThan generalLessThan(d->proxyModel,
1022                              LessThan::GeneralPurpose);
1023
1024     qStableSort(d->sourceModelIndexList.begin(), d->sourceModelIndexList.end(),
1025                 generalLessThan);
1026
1027     // Explore categories
1028     QString prevCategory =
1029                  d->itemCategorizer->categoryForItem(d->sourceModelIndexList[0],
1030                                                      d->proxyModel->sortRole());
1031     QString lastCategory = prevCategory;
1032     QModelIndexList modelIndexList;
1033     struct Private::ElementInfo elementInfo;
1034     foreach (const QModelIndex &index, d->sourceModelIndexList)
1035     {
1036         lastCategory = d->itemCategorizer->categoryForItem(index,
1037                                                      d->proxyModel->sortRole());
1038
1039         elementInfo.category = lastCategory;
1040
1041         if (prevCategory != lastCategory)
1042         {
1043             d->categoriesIndexes.insert(prevCategory, modelIndexList);
1044             d->categories << prevCategory;
1045             modelIndexList.clear();
1046         }
1047
1048         modelIndexList << index;
1049         prevCategory = lastCategory;
1050
1051         d->elementsInfo.insert(index, elementInfo);
1052     }
1053
1054     d->categoriesIndexes.insert(prevCategory, modelIndexList);
1055     d->categories << prevCategory;
1056
1057     // Sort items locally in their respective categories with the category
1058     // purpose lessThan
1059     LessThan categoryLessThan(d->proxyModel,
1060                               LessThan::CategoryPurpose);
1061
1062     foreach (const QString &key, d->categories)
1063     {
1064         QModelIndexList &indexList = d->categoriesIndexes[key];
1065
1066         qStableSort(indexList.begin(), indexList.end(), categoryLessThan);
1067     }
1068
1069     d->lastIndex = d->categoriesIndexes[d->categories[d->categories.count() - 1]][d->categoriesIndexes[d->categories[d->categories.count() - 1]].count() - 1];
1070
1071     // Finally, fill data information of items situation. This will help when
1072     // trying to compute an item place in the viewport
1073     int i = 0; // position relative to the category beginning
1074     int j = 0; // number of elements before current
1075     foreach (const QString &key, d->categories)
1076     {
1077         foreach (const QModelIndex &index, d->categoriesIndexes[key])
1078         {
1079             struct Private::ElementInfo &elementInfo = d->elementsInfo[index];
1080
1081             elementInfo.relativeOffsetToCategory = i;
1082
1083             d->elementDictionary.insert(d->proxyModel->index(j, 0),
1084                                         d->proxyModel->mapFromSource(index));
1085
1086             i++;
1087             j++;
1088         }
1089
1090         i = 0;
1091     }
1092
1093     d->updateScrollbars();
1094 }
1095
1096 void KListView::rowsRemoved(const QModelIndex &parent,
1097                             int start,
1098                             int end)
1099 {
1100     if ((viewMode() == KListView::IconMode) && d->proxyModel &&
1101         d->itemCategorizer)
1102     {
1103         // Force the view to update all elements
1104         rowsInsertedArtifficial(parent, start, end);
1105     }
1106 }
1107
1108 void KListView::updateGeometries()
1109 {
1110     if ((viewMode() != KListView::IconMode) || !d->proxyModel ||
1111         !d->itemCategorizer)
1112     {
1113         QListView::updateGeometries();
1114         return;
1115     }
1116
1117     // Avoid QListView::updateGeometries(), since it will try to set another
1118     // range to our scroll bars, what we don't want (ereslibre)
1119     QAbstractItemView::updateGeometries();
1120 }
1121
1122 void KListView::slotSortingRoleChanged()
1123 {
1124     if ((viewMode() == KListView::IconMode) && d->proxyModel &&
1125         d->itemCategorizer)
1126     {
1127         // Force the view to update all elements
1128         rowsInsertedArtifficial(QModelIndex(), 0, d->proxyModel->rowCount() - 1);
1129     }
1130 }
1131
1132 #include "klistview.moc"