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     , proxyModel(0)
  83     , lastIndex(QModelIndex())
  84 {
  85 }
  86
  87 KListView::Private::~Private()
  88 {
  89 }
  90
  91 const QModelIndexList &KListView::Private::intersectionSet(const QRect &rect)
  92 {
  93     QModelIndex index;
  94     QRect indexVisualRect;
  95
  96     intersectedIndexes.clear();
  97
  98     // Lets find out where we should start
  99     int top = proxyModel->rowCount() - 1;
 100     int bottom = 0;
 101     int middle = (top + bottom) / 2;
 102     while (bottom <= top)
 103     {
 104         middle = (top + bottom) / 2;
 105
 106         index = elementDictionary[proxyModel->index(middle, 0)];
 107         indexVisualRect = visualRect(index);
 108
 109         if (qMax(indexVisualRect.topLeft().y(),
 110                  indexVisualRect.bottomRight().y()) < qMin(rect.topLeft().y(),
 111                                                         rect.bottomRight().y()))
 112         {
 113             bottom = middle + 1;
 114         }
 115         else
 116         {
 117             top = middle - 1;
 118         }
 119     }
 120
 121     int j = 0;
 122     for (int i = middle; i < proxyModel->rowCount(); i++)
 123     {
 124         index = elementDictionary[proxyModel->index(i, 0)];
 125         indexVisualRect = visualRect(index);
 126
 127         if (rect.intersects(indexVisualRect))
 128             intersectedIndexes.append(index);
 129
 130         // If we passed next item, stop searching for hits
 131         if (qMax(rect.bottomRight().y(), rect.topLeft().y()) <
 132                                                   indexVisualRect.topLeft().y())
 133             break;
 134
 135         j++;
 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 (option.rect.contains(listView->viewport()->mapFromGlobal(QCursor::pos())) &&
 335         !mouseButtonPressed)
 336     {
 337         const QPalette::ColorGroup group =
 338                                           option.state & QStyle::State_Enabled ?
 339                                           QPalette::Normal : QPalette::Disabled;
 340
 341         QLinearGradient gradient(option.rect.topLeft(),
 342                                  option.rect.bottomRight());
 343         gradient.setColorAt(0,
 344                             option.palette.color(group,
 345                                                  QPalette::Highlight).light());
 346         gradient.setColorAt(1, Qt::transparent);
 347
 348         painter->fillRect(option.rect, gradient);
 349     }
 350
 351     /*if (const KStyle *style = dynamic_cast<const KStyle*>(QApplication::style()))
 352         {
 353         style->drawControl(KStyle::CE_Category, &opt, painter, this);
 354         }
 355     else
 356     {*/
 357         QFont painterFont = painter->font();
 358         painterFont.setWeight(QFont::Bold);
 359         QFontMetrics metrics(painterFont);
 360         painter->setFont(painterFont);
 361
 362         QPainterPath path;
 363         path.addRect(option.rect.left(),
 364                      option.rect.bottom() - 2,
 365                      option.rect.width(),
 366                      2);
 367
 368         QLinearGradient gradient(option.rect.topLeft(),
 369                                  option.rect.bottomRight());
 370         gradient.setColorAt(0, color);
 371         gradient.setColorAt(1, Qt::transparent);
 372
 373         painter->setBrush(gradient);
 374         painter->fillPath(path, gradient);
 375
 376         painter->setPen(color);
 377
 378         painter->drawText(option.rect, Qt::AlignVCenter | Qt::AlignLeft,
 379              metrics.elidedText(category, Qt::ElideRight, option.rect.width()));
 380     //}
 381     painter->restore();
 382 }
 383
 384
 385 void KListView::Private::updateScrollbars()
 386 {
 387     int lastItemBottom = cachedRectIndex(lastIndex).bottom() +
 388                            listView->spacing() - listView->viewport()->height();
 389     listView->verticalScrollBar()->setRange(0, lastItemBottom);
 390 }
 391
 392
 393 //==============================================================================
 394
 395
 396 KListView::KListView(QWidget *parent)
 397     : QListView(parent)
 398     , d(new Private(this))
 399 {
 400 }
 401
 402 KListView::~KListView()
 403 {
 404     delete d;
 405 }
 406
 407 void KListView::setModel(QAbstractItemModel *model)
 408 {
 409     if (d->proxyModel)
 410     {
 411         QObject::disconnect(d->proxyModel,
 412                             SIGNAL(rowsRemoved(QModelIndex,int,int)),
 413                             this, SLOT(rowsRemoved(QModelIndex,int,int)));
 414
 415         QObject::disconnect(d->proxyModel,
 416                             SIGNAL(sortingRoleChanged()),
 417                             this, SLOT(slotSortingRoleChanged()));
 418     }
 419
 420     QListView::setModel(model);
 421
 422     d->proxyModel = dynamic_cast<KSortFilterProxyModel*>(model);
 423
 424     if (d->proxyModel)
 425     {
 426         QObject::connect(d->proxyModel,
 427                          SIGNAL(rowsRemoved(QModelIndex,int,int)),
 428                          this, SLOT(rowsRemoved(QModelIndex,int,int)));
 429
 430         QObject::connect(d->proxyModel,
 431                          SIGNAL(sortingRoleChanged()),
 432                          this, SLOT(slotSortingRoleChanged()));
 433     }
 434 }
 435
 436 QRect KListView::visualRect(const QModelIndex &index) const
 437 {
 438     if ((viewMode() == KListView::ListMode) || !d->proxyModel ||
 439         !d->itemCategorizer)
 440     {
 441         return QListView::visualRect(index);
 442     }
 443
 444     if (!qobject_cast<const QSortFilterProxyModel*>(index.model()))
 445     {
 446         return d->visualRect(d->proxyModel->mapFromSource(index));
 447     }
 448
 449     return d->visualRect(index);
 450 }
 451
 452 KItemCategorizer *KListView::itemCategorizer() const
 453 {
 454     return d->itemCategorizer;
 455 }
 456
 457 void KListView::setItemCategorizer(KItemCategorizer *itemCategorizer)
 458 {
 459     if (!itemCategorizer && d->proxyModel)
 460     {
 461         QObject::disconnect(d->proxyModel,
 462                             SIGNAL(rowsRemoved(QModelIndex,int,int)),
 463                             this, SLOT(rowsRemoved(QModelIndex,int,int)));
 464
 465         QObject::disconnect(d->proxyModel,
 466                             SIGNAL(sortingRoleChanged()),
 467                             this, SLOT(slotSortingRoleChanged()));
 468     }
 469     else if (itemCategorizer && d->proxyModel)
 470     {
 471         QObject::connect(d->proxyModel,
 472                          SIGNAL(rowsRemoved(QModelIndex,int,int)),
 473                          this, SLOT(rowsRemoved(QModelIndex,int,int)));
 474
 475         QObject::connect(d->proxyModel,
 476                          SIGNAL(sortingRoleChanged()),
 477                          this, SLOT(slotSortingRoleChanged()));
 478     }
 479
 480     d->itemCategorizer = itemCategorizer;
 481
 482     if (itemCategorizer)
 483     {
 484         rowsInserted(QModelIndex(), 0, d->proxyModel->rowCount() - 1);
 485     }
 486 }
 487
 488 QModelIndex KListView::indexAt(const QPoint &point) const
 489 {
 490     if ((viewMode() == KListView::ListMode) || !d->proxyModel ||
 491         !d->itemCategorizer)
 492     {
 493         return QListView::indexAt(point);
 494     }
 495
 496     QModelIndex index;
 497
 498     QModelIndexList item = d->intersectionSet(QRect(point, point));
 499
 500     if (item.count() == 1)
 501     {
 502         index = item[0];
 503     }
 504
 505     d->hovered = index;
 506
 507     return index;
 508 }
 509
 510 void KListView::reset()
 511 {
 512     QListView::reset();
 513
 514     if ((viewMode() == KListView::ListMode) || !d->proxyModel ||
 515         !d->itemCategorizer)
 516     {
 517         return;
 518     }
 519
 520     d->elementsInfo.clear();
 521     d->elementsPosition.clear();
 522     d->elementDictionary.clear();
 523     d->categoriesIndexes.clear();
 524     d->categoriesPosition.clear();
 525     d->categories.clear();
 526     d->intersectedIndexes.clear();
 527     d->sourceModelIndexList.clear();
 528     d->hovered = QModelIndex();
 529     d->mouseButtonPressed = false;
 530 }
 531
 532 void KListView::paintEvent(QPaintEvent *event)
 533 {
 534     if ((viewMode() == KListView::ListMode) || !d->proxyModel ||
 535         !d->itemCategorizer)
 536     {
 537         QListView::paintEvent(event);
 538         return;
 539     }
 540
 541     QStyleOptionViewItemV3 option = viewOptions();
 542     QPainter painter(viewport());
 543     QRect area = event->rect();
 544     const bool focus = (hasFocus() || viewport()->hasFocus()) &&
 545                         currentIndex().isValid();
 546     const QStyle::State state = option.state;
 547     const bool enabled = (state & QStyle::State_Enabled) != 0;
 548
 549     painter.save();
 550
 551     QModelIndexList dirtyIndexes = d->intersectionSet(area);
 552     foreach (const QModelIndex &index, dirtyIndexes)
 553     {
 554         option.state = state;
 555         option.rect = d->visualRect(index);
 556
 557         if (selectionModel() && selectionModel()->isSelected(index))
 558         {
 559             option.state |= QStyle::State_Selected;
 560         }
 561
 562         if (enabled)
 563         {
 564             QPalette::ColorGroup cg;
 565             if ((d->proxyModel->flags(index) & Qt::ItemIsEnabled) == 0)
 566             {
 567                 option.state &= ~QStyle::State_Enabled;
 568                 cg = QPalette::Disabled;
 569             }
 570             else
 571             {
 572                 cg = QPalette::Normal;
 573             }
 574             option.palette.setCurrentColorGroup(cg);
 575         }
 576
 577         if (focus && currentIndex() == index)
 578         {
 579             option.state |= QStyle::State_HasFocus;
 580             if (this->state() == EditingState)
 581                 option.state |= QStyle::State_Editing;
 582         }
 583
 584         if ((index == d->hovered) && !d->mouseButtonPressed)
 585             option.state |= QStyle::State_MouseOver;
 586         else
 587             option.state &= ~QStyle::State_MouseOver;
 588
 589         itemDelegate(index)->paint(&painter, option, index);
 590     }
 591
 592     // Redraw categories
 593     QStyleOptionViewItem otherOption;
 594     foreach (const QString &category, d->categories)
 595     {
 596         otherOption = option;
 597         otherOption.rect = d->categoryVisualRect(category);
 598
 599         if (otherOption.rect.intersects(area))
 600         {
 601             d->drawNewCategory(category, otherOption, &painter);
 602         }
 603     }
 604
 605     if (d->mouseButtonPressed)
 606     {
 607         QPoint start, end, initialPressPosition;
 608
 609         initialPressPosition = d->initialPressPosition;
 610
 611         initialPressPosition.setY(initialPressPosition.y() - verticalOffset());
 612         initialPressPosition.setX(initialPressPosition.x() - horizontalOffset());
 613
 614         if (d->initialPressPosition.x() > d->mousePosition.x() ||
 615             d->initialPressPosition.y() > d->mousePosition.y())
 616         {
 617             start = d->mousePosition;
 618             end = initialPressPosition;
 619         }
 620         else
 621         {
 622             start = initialPressPosition;
 623             end = d->mousePosition;
 624         }
 625
 626         QStyleOptionRubberBand yetAnotherOption;
 627         yetAnotherOption.initFrom(this);
 628         yetAnotherOption.shape = QRubberBand::Rectangle;
 629         yetAnotherOption.opaque = false;
 630         yetAnotherOption.rect = QRect(start, end).intersected(viewport()->rect().adjusted(-16, -16, 16, 16));
 631         painter.save();
 632         style()->drawControl(QStyle::CE_RubberBand, &yetAnotherOption, &painter);
 633         painter.restore();
 634     }
 635
 636     painter.restore();
 637 }
 638
 639 void KListView::resizeEvent(QResizeEvent *event)
 640 {
 641     QListView::resizeEvent(event);
 642
 643     if ((viewMode() == KListView::ListMode) || !d->proxyModel ||
 644         !d->itemCategorizer)
 645     {
 646         return;
 647     }
 648
 649     // Clear the items positions cache
 650     d->elementsPosition.clear();
 651     d->categoriesPosition.clear();
 652
 653     d->updateScrollbars();
 654 }
 655
 656 void KListView::setSelection(const QRect &rect,
 657                              QItemSelectionModel::SelectionFlags flags)
 658 {
 659     if ((viewMode() == KListView::ListMode) || !d->proxyModel ||
 660         !d->itemCategorizer)
 661     {
 662         QListView::setSelection(rect, flags);
 663         return;
 664     }
 665
 666     // FIXME: I have to rethink and rewrite this method (ereslibre)
 667
 668     QModelIndexList dirtyIndexes = d->intersectionSet(rect);
 669     foreach (const QModelIndex &index, dirtyIndexes)
 670     {
 671         if (!d->mouseButtonPressed && rect.intersects(visualRect(index)))
 672         {
 673             selectionModel()->select(index, flags);
 674         }
 675         else
 676         {
 677             selectionModel()->select(index, QItemSelectionModel::Select);
 678
 679             if (d->mouseButtonPressed)
 680                 d->tempSelected.append(index);
 681         }
 682     }
 683
 684     if (d->mouseButtonPressed)
 685     {
 686         foreach (const QModelIndex &index, selectionModel()->selectedIndexes())
 687         {
 688             if (!rect.intersects(visualRect(index)))
 689             {
 690                 selectionModel()->select(index, QItemSelectionModel::Deselect);
 691
 692                 if (d->mouseButtonPressed)
 693                 {
 694                     d->tempSelected.removeAll(index);
 695                 }
 696             }
 697         }
 698     }
 699 }
 700
 701 void KListView::mouseMoveEvent(QMouseEvent *event)
 702 {
 703     QListView::mouseMoveEvent(event);
 704
 705     d->mousePosition = event->pos();
 706
 707     if ((viewMode() == KListView::ListMode) || !d->proxyModel ||
 708         !d->itemCategorizer)
 709     {
 710         return;
 711     }
 712
 713     event->accept();
 714
 715     viewport()->update();
 716 }
 717
 718 void KListView::mousePressEvent(QMouseEvent *event)
 719 {
 720     QListView::mousePressEvent(event);
 721
 722     d->tempSelected.clear();
 723
 724     if ((viewMode() == KListView::ListMode) || !d->proxyModel ||
 725         !d->itemCategorizer)
 726     {
 727         return;
 728     }
 729
 730     event->accept();
 731
 732     if (event->button() == Qt::LeftButton)
 733     {
 734         d->mouseButtonPressed = true;
 735
 736         d->initialPressPosition = event->pos();
 737         d->initialPressPosition.setY(d->initialPressPosition.y() +
 738                                                               verticalOffset());
 739         d->initialPressPosition.setX(d->initialPressPosition.x() +
 740                                                             horizontalOffset());
 741     }
 742
 743     viewport()->update();
 744 }
 745
 746 void KListView::mouseReleaseEvent(QMouseEvent *event)
 747 {
 748     QListView::mouseReleaseEvent(event);
 749
 750     d->mouseButtonPressed = false;
 751
 752     if ((viewMode() == KListView::ListMode) || !d->proxyModel ||
 753         !d->itemCategorizer)
 754     {
 755         return;
 756     }
 757
 758     event->accept();
 759
 760     // FIXME: I have to rethink and rewrite this method (ereslibre)
 761
 762     QPoint initialPressPosition = viewport()->mapFromGlobal(QCursor::pos());
 763     initialPressPosition.setY(initialPressPosition.y() + verticalOffset());
 764     initialPressPosition.setX(initialPressPosition.x() + horizontalOffset());
 765
 766     if (initialPressPosition == d->initialPressPosition)
 767     {
 768         foreach(const QString &category, d->categories)
 769         {
 770             if (d->categoryVisualRect(category).contains(event->pos()))
 771             {
 772                 QModelIndex index;
 773                 QItemSelectionModel::SelectionFlag flag;
 774                 foreach (const QModelIndex &mappedIndex,
 775                          d->categoriesIndexes[category])
 776                 {
 777                     index = d->proxyModel->mapFromSource(mappedIndex);
 778
 779                     if (selectionModel()->selectedIndexes().contains(index))
 780                     {
 781                         flag = QItemSelectionModel::Deselect;
 782                     }
 783                     else
 784                     {
 785                         flag = QItemSelectionModel::Select;
 786                     }
 787
 788                     selectionModel()->select(index, flag);
 789                 }
 790             }
 791         }
 792     }
 793
 794     viewport()->update();
 795 }
 796
 797 void KListView::leaveEvent(QEvent *event)
 798 {
 799     QListView::leaveEvent(event);
 800
 801     d->hovered = QModelIndex();
 802
 803     if ((viewMode() == KListView::ListMode) || !d->proxyModel ||
 804         !d->itemCategorizer)
 805     {
 806         return;
 807     }
 808
 809     event->accept();
 810
 811     viewport()->update();
 812 }
 813
 814 void KListView::rowsInserted(const QModelIndex &parent,
 815                              int start,
 816                              int end)
 817 {
 818     QListView::rowsInserted(parent, start, end);
 819
 820     if ((viewMode() == KListView::ListMode) || !d->proxyModel ||
 821         !d->itemCategorizer)
 822     {
 823         return;
 824     }
 825
 826     rowsInsertedArtifficial(parent, start, end);
 827 }
 828
 829 void KListView::rowsInsertedArtifficial(const QModelIndex &parent,
 830                                                 int start,
 831                                                 int end)
 832 {
 833     d->elementsInfo.clear();
 834     d->elementsPosition.clear();
 835     d->elementDictionary.clear();
 836     d->categoriesIndexes.clear();
 837     d->categoriesPosition.clear();
 838     d->categories.clear();
 839     d->intersectedIndexes.clear();
 840     d->sourceModelIndexList.clear();
 841     d->hovered = QModelIndex();
 842     d->mouseButtonPressed = false;
 843
 844     if (start > end || end < 0 || start < 0 || !d->proxyModel->rowCount())
 845     {
 846         return;
 847     }
 848
 849     // Add all elements mapped to the source model
 850     for (int k = 0; k < d->proxyModel->rowCount(); k++)
 851     {
 852         d->sourceModelIndexList <<
 853                          d->proxyModel->mapToSource(d->proxyModel->index(k, 0));
 854     }
 855
 856     // Sort them with the general purpose lessThan method
 857     LessThan generalLessThan(d->proxyModel,
 858                              LessThan::GeneralPurpose);
 859
 860     qStableSort(d->sourceModelIndexList.begin(), d->sourceModelIndexList.end(),
 861                 generalLessThan);
 862
 863     // Explore categories
 864     QString prevCategory =
 865                  d->itemCategorizer->categoryForItem(d->sourceModelIndexList[0],
 866                                                      d->proxyModel->sortRole());
 867     QString lastCategory = prevCategory;
 868     QModelIndexList modelIndexList;
 869     struct Private::ElementInfo elementInfo;
 870     foreach (const QModelIndex &index, d->sourceModelIndexList)
 871     {
 872         lastCategory = d->itemCategorizer->categoryForItem(index,
 873                                                      d->proxyModel->sortRole());
 874
 875         elementInfo.category = lastCategory;
 876
 877         if (prevCategory != lastCategory)
 878         {
 879             d->categoriesIndexes.insert(prevCategory, modelIndexList);
 880             d->categories << prevCategory;
 881             modelIndexList.clear();
 882         }
 883
 884         modelIndexList << index;
 885         prevCategory = lastCategory;
 886
 887         d->elementsInfo.insert(index, elementInfo);
 888     }
 889
 890     d->categoriesIndexes.insert(prevCategory, modelIndexList);
 891     d->categories << prevCategory;
 892
 893     // Sort items locally in their respective categories with the category
 894     // purpose lessThan
 895     LessThan categoryLessThan(d->proxyModel,
 896                               LessThan::CategoryPurpose);
 897
 898     foreach (const QString &key, d->categories)
 899     {
 900         QModelIndexList &indexList = d->categoriesIndexes[key];
 901
 902         qStableSort(indexList.begin(), indexList.end(), categoryLessThan);
 903     }
 904
 905     d->lastIndex = d->categoriesIndexes[d->categories[d->categories.count() - 1]][d->categoriesIndexes[d->categories[d->categories.count() - 1]].count() - 1];
 906
 907     // Finally, fill data information of items situation. This will help when
 908     // trying to compute an item place in the viewport
 909     int i = 0; // position relative to the category beginning
 910     int j = 0; // number of elements before current
 911     foreach (const QString &key, d->categories)
 912     {
 913         foreach (const QModelIndex &index, d->categoriesIndexes[key])
 914         {
 915             struct Private::ElementInfo &elementInfo = d->elementsInfo[index];
 916
 917             elementInfo.relativeOffsetToCategory = i;
 918
 919             d->elementDictionary.insert(d->proxyModel->index(j, 0),
 920                                         d->proxyModel->mapFromSource(index));
 921
 922             i++;
 923             j++;
 924         }
 925
 926         i = 0;
 927     }
 928
 929     d->updateScrollbars();
 930 }
 931
 932 void KListView::rowsRemoved(const QModelIndex &parent,
 933                             int start,
 934                             int end)
 935 {
 936     if (d->proxyModel)
 937     {
 938         // Force the view to update all elements
 939         rowsInsertedArtifficial(parent, start, end);
 940     }
 941 }
 942
 943 void KListView::updateGeometries()
 944 {
 945     if ((viewMode() == KListView::ListMode) || !d->proxyModel ||
 946         !d->itemCategorizer)
 947     {
 948         QListView::updateGeometries();
 949         return;
 950     }
 951
 952     // Avoid QListView::updateGeometries(), since it will try to set another
 953     // range to our scroll bars, what we don't want (ereslibre)
 954     QAbstractItemView::updateGeometries();
 955 }
 956
 957 void KListView::slotSortingRoleChanged()
 958 {
 959     if (d->proxyModel)
 960     {
 961         // Force the view to update all elements
 962         rowsInsertedArtifficial(QModelIndex(), 0, d->proxyModel->rowCount() -
 963                                                                              1);
 964     }
 965 }
 966
 967 #include "klistview.moc"