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