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