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
 390     listView->verticalScrollBar()->setSingleStep(listView->viewport()->height() / 10);
 391     listView->verticalScrollBar()->setPageStep(listView->viewport()->height());
 392     listView->verticalScrollBar()->setRange(0, lastItemBottom);
 393 }
 394
 395
 396 //==============================================================================
 397
 398
 399 KListView::KListView(QWidget *parent)
 400     : QListView(parent)
 401     , d(new Private(this))
 402 {
 403 }
 404
 405 KListView::~KListView()
 406 {
 407     delete d;
 408 }
 409
 410 void KListView::setModel(QAbstractItemModel *model)
 411 {
 412     if (d->proxyModel)
 413     {
 414         QObject::disconnect(d->proxyModel,
 415                             SIGNAL(rowsRemoved(QModelIndex,int,int)),
 416                             this, SLOT(rowsRemoved(QModelIndex,int,int)));
 417
 418         QObject::disconnect(d->proxyModel,
 419                             SIGNAL(sortingRoleChanged()),
 420                             this, SLOT(slotSortingRoleChanged()));
 421     }
 422
 423     QListView::setModel(model);
 424
 425     d->proxyModel = dynamic_cast<KSortFilterProxyModel*>(model);
 426
 427     if (d->proxyModel)
 428     {
 429         QObject::connect(d->proxyModel,
 430                          SIGNAL(rowsRemoved(QModelIndex,int,int)),
 431                          this, SLOT(rowsRemoved(QModelIndex,int,int)));
 432
 433         QObject::connect(d->proxyModel,
 434                          SIGNAL(sortingRoleChanged()),
 435                          this, SLOT(slotSortingRoleChanged()));
 436     }
 437 }
 438
 439 QRect KListView::visualRect(const QModelIndex &index) const
 440 {
 441     if ((viewMode() == KListView::ListMode) || !d->proxyModel ||
 442         !d->itemCategorizer)
 443     {
 444         return QListView::visualRect(index);
 445     }
 446
 447     if (!qobject_cast<const QSortFilterProxyModel*>(index.model()))
 448     {
 449         return d->visualRect(d->proxyModel->mapFromSource(index));
 450     }
 451
 452     return d->visualRect(index);
 453 }
 454
 455 KItemCategorizer *KListView::itemCategorizer() const
 456 {
 457     return d->itemCategorizer;
 458 }
 459
 460 void KListView::setItemCategorizer(KItemCategorizer *itemCategorizer)
 461 {
 462     if (!itemCategorizer && d->proxyModel)
 463     {
 464         QObject::disconnect(d->proxyModel,
 465                             SIGNAL(rowsRemoved(QModelIndex,int,int)),
 466                             this, SLOT(rowsRemoved(QModelIndex,int,int)));
 467
 468         QObject::disconnect(d->proxyModel,
 469                             SIGNAL(sortingRoleChanged()),
 470                             this, SLOT(slotSortingRoleChanged()));
 471     }
 472     else if (itemCategorizer && d->proxyModel)
 473     {
 474         QObject::connect(d->proxyModel,
 475                          SIGNAL(rowsRemoved(QModelIndex,int,int)),
 476                          this, SLOT(rowsRemoved(QModelIndex,int,int)));
 477
 478         QObject::connect(d->proxyModel,
 479                          SIGNAL(sortingRoleChanged()),
 480                          this, SLOT(slotSortingRoleChanged()));
 481     }
 482
 483     d->itemCategorizer = itemCategorizer;
 484
 485     if (itemCategorizer)
 486     {
 487         rowsInserted(QModelIndex(), 0, d->proxyModel->rowCount() - 1);
 488     }
 489     else
 490     {
 491         updateGeometries();
 492     }
 493 }
 494
 495 QModelIndex KListView::indexAt(const QPoint &point) const
 496 {
 497     if ((viewMode() == KListView::ListMode) || !d->proxyModel ||
 498         !d->itemCategorizer)
 499     {
 500         return QListView::indexAt(point);
 501     }
 502
 503     QModelIndex index;
 504
 505     QModelIndexList item = d->intersectionSet(QRect(point, point));
 506
 507     if (item.count() == 1)
 508     {
 509         index = item[0];
 510     }
 511
 512     d->hovered = index;
 513
 514     return index;
 515 }
 516
 517 void KListView::reset()
 518 {
 519     QListView::reset();
 520
 521     if ((viewMode() == KListView::ListMode) || !d->proxyModel ||
 522         !d->itemCategorizer)
 523     {
 524         return;
 525     }
 526
 527     d->elementsInfo.clear();
 528     d->elementsPosition.clear();
 529     d->elementDictionary.clear();
 530     d->categoriesIndexes.clear();
 531     d->categoriesPosition.clear();
 532     d->categories.clear();
 533     d->intersectedIndexes.clear();
 534     d->sourceModelIndexList.clear();
 535     d->hovered = QModelIndex();
 536     d->mouseButtonPressed = false;
 537 }
 538
 539 void KListView::paintEvent(QPaintEvent *event)
 540 {
 541     if ((viewMode() == KListView::ListMode) || !d->proxyModel ||
 542         !d->itemCategorizer)
 543     {
 544         QListView::paintEvent(event);
 545         return;
 546     }
 547
 548     QStyleOptionViewItemV3 option = viewOptions();
 549     QPainter painter(viewport());
 550     QRect area = event->rect();
 551     const bool focus = (hasFocus() || viewport()->hasFocus()) &&
 552                         currentIndex().isValid();
 553     const QStyle::State state = option.state;
 554     const bool enabled = (state & QStyle::State_Enabled) != 0;
 555
 556     painter.save();
 557
 558     QModelIndexList dirtyIndexes = d->intersectionSet(area);
 559     foreach (const QModelIndex &index, dirtyIndexes)
 560     {
 561         option.state = state;
 562         option.rect = d->visualRect(index);
 563
 564         if (selectionModel() && selectionModel()->isSelected(index))
 565         {
 566             option.state |= QStyle::State_Selected;
 567         }
 568
 569         if (enabled)
 570         {
 571             QPalette::ColorGroup cg;
 572             if ((d->proxyModel->flags(index) & Qt::ItemIsEnabled) == 0)
 573             {
 574                 option.state &= ~QStyle::State_Enabled;
 575                 cg = QPalette::Disabled;
 576             }
 577             else
 578             {
 579                 cg = QPalette::Normal;
 580             }
 581             option.palette.setCurrentColorGroup(cg);
 582         }
 583
 584         if (focus && currentIndex() == index)
 585         {
 586             option.state |= QStyle::State_HasFocus;
 587             if (this->state() == EditingState)
 588                 option.state |= QStyle::State_Editing;
 589         }
 590
 591         if ((index == d->hovered) && !d->mouseButtonPressed)
 592             option.state |= QStyle::State_MouseOver;
 593         else
 594             option.state &= ~QStyle::State_MouseOver;
 595
 596         itemDelegate(index)->paint(&painter, option, index);
 597     }
 598
 599     // Redraw categories
 600     QStyleOptionViewItem otherOption;
 601     foreach (const QString &category, d->categories)
 602     {
 603         otherOption = option;
 604         otherOption.rect = d->categoryVisualRect(category);
 605
 606         if (otherOption.rect.intersects(area))
 607         {
 608             d->drawNewCategory(category, otherOption, &painter);
 609         }
 610     }
 611
 612     if (d->mouseButtonPressed)
 613     {
 614         QPoint start, end, initialPressPosition;
 615
 616         initialPressPosition = d->initialPressPosition;
 617
 618         initialPressPosition.setY(initialPressPosition.y() - verticalOffset());
 619         initialPressPosition.setX(initialPressPosition.x() - horizontalOffset());
 620
 621         if (d->initialPressPosition.x() > d->mousePosition.x() ||
 622             d->initialPressPosition.y() > d->mousePosition.y())
 623         {
 624             start = d->mousePosition;
 625             end = initialPressPosition;
 626         }
 627         else
 628         {
 629             start = initialPressPosition;
 630             end = d->mousePosition;
 631         }
 632
 633         QStyleOptionRubberBand yetAnotherOption;
 634         yetAnotherOption.initFrom(this);
 635         yetAnotherOption.shape = QRubberBand::Rectangle;
 636         yetAnotherOption.opaque = false;
 637         yetAnotherOption.rect = QRect(start, end).intersected(viewport()->rect().adjusted(-16, -16, 16, 16));
 638         painter.save();
 639         style()->drawControl(QStyle::CE_RubberBand, &yetAnotherOption, &painter);
 640         painter.restore();
 641     }
 642
 643     painter.restore();
 644 }
 645
 646 void KListView::resizeEvent(QResizeEvent *event)
 647 {
 648     QListView::resizeEvent(event);
 649
 650     if ((viewMode() == KListView::ListMode) || !d->proxyModel ||
 651         !d->itemCategorizer)
 652     {
 653         return;
 654     }
 655
 656     // Clear the items positions cache
 657     d->elementsPosition.clear();
 658     d->categoriesPosition.clear();
 659
 660     d->updateScrollbars();
 661 }
 662
 663 void KListView::setSelection(const QRect &rect,
 664                              QItemSelectionModel::SelectionFlags flags)
 665 {
 666     if ((viewMode() == KListView::ListMode) || !d->proxyModel ||
 667         !d->itemCategorizer)
 668     {
 669         QListView::setSelection(rect, flags);
 670         return;
 671     }
 672
 673     // FIXME: I have to rethink and rewrite this method (ereslibre)
 674
 675     QModelIndexList dirtyIndexes = d->intersectionSet(rect);
 676     foreach (const QModelIndex &index, dirtyIndexes)
 677     {
 678         if (!d->mouseButtonPressed && rect.intersects(visualRect(index)))
 679         {
 680             selectionModel()->select(index, flags);
 681         }
 682         else
 683         {
 684             selectionModel()->select(index, QItemSelectionModel::Select);
 685
 686             if (d->mouseButtonPressed)
 687                 d->tempSelected.append(index);
 688         }
 689     }
 690
 691     if (d->mouseButtonPressed)
 692     {
 693         foreach (const QModelIndex &index, selectionModel()->selectedIndexes())
 694         {
 695             if (!rect.intersects(visualRect(index)))
 696             {
 697                 selectionModel()->select(index, QItemSelectionModel::Deselect);
 698
 699                 if (d->mouseButtonPressed)
 700                 {
 701                     d->tempSelected.removeAll(index);
 702                 }
 703             }
 704         }
 705     }
 706 }
 707
 708 void KListView::mouseMoveEvent(QMouseEvent *event)
 709 {
 710     QListView::mouseMoveEvent(event);
 711
 712     d->mousePosition = event->pos();
 713
 714     if ((viewMode() == KListView::ListMode) || !d->proxyModel ||
 715         !d->itemCategorizer)
 716     {
 717         return;
 718     }
 719
 720     event->accept();
 721
 722     viewport()->update();
 723 }
 724
 725 void KListView::mousePressEvent(QMouseEvent *event)
 726 {
 727     QListView::mousePressEvent(event);
 728
 729     d->tempSelected.clear();
 730
 731     if ((viewMode() == KListView::ListMode) || !d->proxyModel ||
 732         !d->itemCategorizer)
 733     {
 734         return;
 735     }
 736
 737     event->accept();
 738
 739     if (event->button() == Qt::LeftButton)
 740     {
 741         d->mouseButtonPressed = true;
 742
 743         d->initialPressPosition = event->pos();
 744         d->initialPressPosition.setY(d->initialPressPosition.y() +
 745                                                               verticalOffset());
 746         d->initialPressPosition.setX(d->initialPressPosition.x() +
 747                                                             horizontalOffset());
 748     }
 749
 750     viewport()->update();
 751 }
 752
 753 void KListView::mouseReleaseEvent(QMouseEvent *event)
 754 {
 755     QListView::mouseReleaseEvent(event);
 756
 757     d->mouseButtonPressed = false;
 758
 759     if ((viewMode() == KListView::ListMode) || !d->proxyModel ||
 760         !d->itemCategorizer)
 761     {
 762         return;
 763     }
 764
 765     event->accept();
 766
 767     // FIXME: I have to rethink and rewrite this method (ereslibre)
 768
 769     QPoint initialPressPosition = viewport()->mapFromGlobal(QCursor::pos());
 770     initialPressPosition.setY(initialPressPosition.y() + verticalOffset());
 771     initialPressPosition.setX(initialPressPosition.x() + horizontalOffset());
 772
 773     if (initialPressPosition == d->initialPressPosition)
 774     {
 775         foreach(const QString &category, d->categories)
 776         {
 777             if (d->categoryVisualRect(category).contains(event->pos()))
 778             {
 779                 QModelIndex index;
 780                 QItemSelectionModel::SelectionFlag flag;
 781                 foreach (const QModelIndex &mappedIndex,
 782                          d->categoriesIndexes[category])
 783                 {
 784                     index = d->proxyModel->mapFromSource(mappedIndex);
 785
 786                     if (selectionModel()->selectedIndexes().contains(index))
 787                     {
 788                         flag = QItemSelectionModel::Deselect;
 789                     }
 790                     else
 791                     {
 792                         flag = QItemSelectionModel::Select;
 793                     }
 794
 795                     selectionModel()->select(index, flag);
 796                 }
 797             }
 798         }
 799     }
 800
 801     viewport()->update();
 802 }
 803
 804 void KListView::leaveEvent(QEvent *event)
 805 {
 806     QListView::leaveEvent(event);
 807
 808     d->hovered = QModelIndex();
 809
 810     if ((viewMode() == KListView::ListMode) || !d->proxyModel ||
 811         !d->itemCategorizer)
 812     {
 813         return;
 814     }
 815
 816     event->accept();
 817
 818     viewport()->update();
 819 }
 820
 821 void KListView::rowsInserted(const QModelIndex &parent,
 822                              int start,
 823                              int end)
 824 {
 825     QListView::rowsInserted(parent, start, end);
 826
 827     if ((viewMode() == KListView::ListMode) || !d->proxyModel ||
 828         !d->itemCategorizer)
 829     {
 830         return;
 831     }
 832
 833     rowsInsertedArtifficial(parent, start, end);
 834 }
 835
 836 void KListView::rowsInsertedArtifficial(const QModelIndex &parent,
 837                                                 int start,
 838                                                 int end)
 839 {
 840     d->elementsInfo.clear();
 841     d->elementsPosition.clear();
 842     d->elementDictionary.clear();
 843     d->categoriesIndexes.clear();
 844     d->categoriesPosition.clear();
 845     d->categories.clear();
 846     d->intersectedIndexes.clear();
 847     d->sourceModelIndexList.clear();
 848     d->hovered = QModelIndex();
 849     d->mouseButtonPressed = false;
 850
 851     if (start > end || end < 0 || start < 0 || !d->proxyModel->rowCount())
 852     {
 853         return;
 854     }
 855
 856     // Add all elements mapped to the source model
 857     for (int k = 0; k < d->proxyModel->rowCount(); k++)
 858     {
 859         d->sourceModelIndexList <<
 860                          d->proxyModel->mapToSource(d->proxyModel->index(k, 0));
 861     }
 862
 863     // Sort them with the general purpose lessThan method
 864     LessThan generalLessThan(d->proxyModel,
 865                              LessThan::GeneralPurpose);
 866
 867     qStableSort(d->sourceModelIndexList.begin(), d->sourceModelIndexList.end(),
 868                 generalLessThan);
 869
 870     // Explore categories
 871     QString prevCategory =
 872                  d->itemCategorizer->categoryForItem(d->sourceModelIndexList[0],
 873                                                      d->proxyModel->sortRole());
 874     QString lastCategory = prevCategory;
 875     QModelIndexList modelIndexList;
 876     struct Private::ElementInfo elementInfo;
 877     foreach (const QModelIndex &index, d->sourceModelIndexList)
 878     {
 879         lastCategory = d->itemCategorizer->categoryForItem(index,
 880                                                      d->proxyModel->sortRole());
 881
 882         elementInfo.category = lastCategory;
 883
 884         if (prevCategory != lastCategory)
 885         {
 886             d->categoriesIndexes.insert(prevCategory, modelIndexList);
 887             d->categories << prevCategory;
 888             modelIndexList.clear();
 889         }
 890
 891         modelIndexList << index;
 892         prevCategory = lastCategory;
 893
 894         d->elementsInfo.insert(index, elementInfo);
 895     }
 896
 897     d->categoriesIndexes.insert(prevCategory, modelIndexList);
 898     d->categories << prevCategory;
 899
 900     // Sort items locally in their respective categories with the category
 901     // purpose lessThan
 902     LessThan categoryLessThan(d->proxyModel,
 903                               LessThan::CategoryPurpose);
 904
 905     foreach (const QString &key, d->categories)
 906     {
 907         QModelIndexList &indexList = d->categoriesIndexes[key];
 908
 909         qStableSort(indexList.begin(), indexList.end(), categoryLessThan);
 910     }
 911
 912     d->lastIndex = d->categoriesIndexes[d->categories[d->categories.count() - 1]][d->categoriesIndexes[d->categories[d->categories.count() - 1]].count() - 1];
 913
 914     // Finally, fill data information of items situation. This will help when
 915     // trying to compute an item place in the viewport
 916     int i = 0; // position relative to the category beginning
 917     int j = 0; // number of elements before current
 918     foreach (const QString &key, d->categories)
 919     {
 920         foreach (const QModelIndex &index, d->categoriesIndexes[key])
 921         {
 922             struct Private::ElementInfo &elementInfo = d->elementsInfo[index];
 923
 924             elementInfo.relativeOffsetToCategory = i;
 925
 926             d->elementDictionary.insert(d->proxyModel->index(j, 0),
 927                                         d->proxyModel->mapFromSource(index));
 928
 929             i++;
 930             j++;
 931         }
 932
 933         i = 0;
 934     }
 935
 936     d->updateScrollbars();
 937 }
 938
 939 void KListView::rowsRemoved(const QModelIndex &parent,
 940                             int start,
 941                             int end)
 942 {
 943     if (d->proxyModel)
 944     {
 945         // Force the view to update all elements
 946         rowsInsertedArtifficial(parent, start, end);
 947     }
 948 }
 949
 950 void KListView::updateGeometries()
 951 {
 952     if ((viewMode() == KListView::ListMode) || !d->proxyModel ||
 953         !d->itemCategorizer)
 954     {
 955         QListView::updateGeometries();
 956         return;
 957     }
 958
 959     // Avoid QListView::updateGeometries(), since it will try to set another
 960     // range to our scroll bars, what we don't want (ereslibre)
 961     QAbstractItemView::updateGeometries();
 962 }
 963
 964 void KListView::slotSortingRoleChanged()
 965 {
 966     if ((viewMode() == KListView::IconMode) && d->proxyModel &&
 967         d->itemCategorizer)
 968     {
 969         // Force the view to update all elements
 970         rowsInsertedArtifficial(QModelIndex(), 0, d->proxyModel->rowCount() - 1);
 971     }
 972 }
 973
 974 #include "klistview.moc"