src/kcategorizedview.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 "kcategorizedview.h"
  22 #include "kcategorizedview_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 KCategorizedView::Private::Private(KCategorizedView *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 KCategorizedView::Private::~Private()
  90 {
  91 }
  92
  93 const QModelIndexList &KCategorizedView::Private::intersectionSet(const QRect &rect)
  94 {
  95     QModelIndex index;
  96     QRect indexVisualRect;
  97
  98     intersectedIndexes.clear();
  99
 100     // Lets find out where we should start
 101     int top = proxyModel->rowCount() - 1;
 102     int bottom = 0;
 103     int middle = (top + bottom) / 2;
 104     while (bottom <= top)
 105     {
 106         middle = (top + bottom) / 2;
 107
 108         index = elementDictionary[proxyModel->index(middle, 0)];
 109         indexVisualRect = visualRect(index);
 110
 111         if (qMax(indexVisualRect.topLeft().y(),
 112                  indexVisualRect.bottomRight().y()) < qMin(rect.topLeft().y(),
 113                                                         rect.bottomRight().y()))
 114         {
 115             bottom = middle + 1;
 116         }
 117         else
 118         {
 119             top = middle - 1;
 120         }
 121     }
 122
 123     for (int i = middle; i < proxyModel->rowCount(); i++)
 124     {
 125         index = elementDictionary[proxyModel->index(i, 0)];
 126         indexVisualRect = visualRect(index);
 127
 128         if (rect.intersects(indexVisualRect))
 129             intersectedIndexes.append(index);
 130
 131         // If we passed next item, stop searching for hits
 132         if (qMax(rect.bottomRight().y(), rect.topLeft().y()) <
 133                                                   qMin(indexVisualRect.topLeft().y(),
 134                                                        indexVisualRect.bottomRight().y()))
 135             break;
 136     }
 137
 138     return intersectedIndexes;
 139 }
 140
 141 QRect KCategorizedView::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                   itemCategorizer->categoryHeight(listView->viewOptions()), 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     foreach (const QString &category, categories)
 173     {
 174         if (category == curCategory)
 175             break;
 176
 177         float rows = (float) ((float) categoriesIndexes[category].count() /
 178                               (float) elementsPerRow);
 179         int rowsInt = categoriesIndexes[category].count() / elementsPerRow;
 180
 181         if (rows - trunc(rows)) rowsInt++;
 182
 183         retRect.setTop(retRect.top() +
 184                        (rowsInt * listView->spacing()) +
 185                        (rowsInt * itemHeight) +
 186                        itemCategorizer->categoryHeight(listView->viewOptions()) +
 187                        listView->spacing() * 2);
 188     }
 189
 190     retRect.setTop(retRect.top() + row * listView->spacing() +
 191                    row * itemHeight);
 192
 193     retRect.setWidth(itemWidth);
 194     retRect.setHeight(itemHeight);
 195
 196     return retRect;
 197 }
 198
 199 QRect KCategorizedView::Private::visualCategoryRectInViewport(const QString &category)
 200                                                                            const
 201 {
 202     QRect retRect(listView->spacing(),
 203                   listView->spacing(),
 204                   listView->viewport()->width() - listView->spacing() * 2,
 205                   0);
 206
 207     if (!proxyModel->rowCount() || !categories.contains(category))
 208         return QRect();
 209
 210     QModelIndex index = proxyModel->index(0, 0, QModelIndex());
 211
 212     int viewportWidth = listView->viewport()->width() - listView->spacing();
 213
 214     // We really need all items to be of same size. Otherwise we cannot do this
 215     // (ereslibre)
 216     // QSize itemSize = listView->sizeHintForIndex(index);
 217     // int itemHeight = itemSize.height();
 218     // int itemWidth = itemSize.width();
 219     int itemHeight = 107;
 220     int itemWidth = 130;
 221     int itemWidthPlusSeparation = listView->spacing() + itemWidth;
 222     int elementsPerRow = viewportWidth / itemWidthPlusSeparation;
 223
 224     if (!elementsPerRow)
 225         elementsPerRow++;
 226
 227     foreach (const QString &itCategory, categories)
 228     {
 229         if (itCategory == category)
 230             break;
 231
 232         float rows = (float) ((float) categoriesIndexes[itCategory].count() /
 233                               (float) elementsPerRow);
 234         int rowsInt = categoriesIndexes[itCategory].count() / elementsPerRow;
 235
 236         if (rows - trunc(rows)) rowsInt++;
 237
 238         retRect.setTop(retRect.top() +
 239                        (rowsInt * listView->spacing()) +
 240                        (rowsInt * itemHeight) +
 241                        itemCategorizer->categoryHeight(listView->viewOptions()) +
 242                        listView->spacing() * 2);
 243     }
 244
 245     retRect.setHeight(itemCategorizer->categoryHeight(listView->viewOptions()));
 246
 247     return retRect;
 248 }
 249
 250 // We're sure elementsPosition doesn't contain index
 251 const QRect &KCategorizedView::Private::cacheIndex(const QModelIndex &index)
 252 {
 253     QRect rect = visualRectInViewport(index);
 254     elementsPosition[index] = rect;
 255
 256     return elementsPosition[index];
 257 }
 258
 259 // We're sure categoriesPosition doesn't contain category
 260 const QRect &KCategorizedView::Private::cacheCategory(const QString &category)
 261 {
 262     QRect rect = visualCategoryRectInViewport(category);
 263     categoriesPosition[category] = rect;
 264
 265     return categoriesPosition[category];
 266 }
 267
 268 const QRect &KCategorizedView::Private::cachedRectIndex(const QModelIndex &index)
 269 {
 270     if (elementsPosition.contains(index)) // If we have it cached
 271     {                                        // return it
 272         return elementsPosition[index];
 273     }
 274     else                                     // Otherwise, cache it
 275     {                                        // and return it
 276         return cacheIndex(index);
 277     }
 278 }
 279
 280 const QRect &KCategorizedView::Private::cachedRectCategory(const QString &category)
 281 {
 282     if (categoriesPosition.contains(category)) // If we have it cached
 283     {                                                // return it
 284         return categoriesPosition[category];
 285     }
 286     else                                            // Otherwise, cache it and
 287     {                                               // return it
 288         return cacheCategory(category);
 289     }
 290 }
 291
 292 QRect KCategorizedView::Private::visualRect(const QModelIndex &index)
 293 {
 294     QModelIndex mappedIndex = proxyModel->mapToSource(index);
 295
 296     QRect retRect = cachedRectIndex(mappedIndex);
 297     int dx = -listView->horizontalOffset();
 298     int dy = -listView->verticalOffset();
 299     retRect.adjust(dx, dy, dx, dy);
 300
 301     return retRect;
 302 }
 303
 304 QRect KCategorizedView::Private::categoryVisualRect(const QString &category)
 305 {
 306     QRect retRect = cachedRectCategory(category);
 307     int dx = -listView->horizontalOffset();
 308     int dy = -listView->verticalOffset();
 309     retRect.adjust(dx, dy, dx, dy);
 310
 311     return retRect;
 312 }
 313
 314 void KCategorizedView::Private::drawNewCategory(const QModelIndex &index,
 315                                          int sortRole,
 316                                          const QStyleOption &option,
 317                                          QPainter *painter)
 318 {
 319     QStyleOption optionCopy = option;
 320     const QString category = itemCategorizer->categoryForItem(index, sortRole);
 321
 322     if ((category == hoveredCategory) && !mouseButtonPressed)
 323     {
 324         optionCopy.state |= QStyle::State_MouseOver;
 325     }
 326
 327     itemCategorizer->drawCategory(index,
 328                                   sortRole,
 329                                   optionCopy,
 330                                   painter);
 331 }
 332
 333
 334 void KCategorizedView::Private::updateScrollbars()
 335 {
 336     int lastItemBottom = cachedRectIndex(lastIndex).bottom() +
 337                            listView->spacing() - listView->viewport()->height();
 338
 339     listView->verticalScrollBar()->setSingleStep(listView->viewport()->height() / 10);
 340     listView->verticalScrollBar()->setPageStep(listView->viewport()->height());
 341     listView->verticalScrollBar()->setRange(0, lastItemBottom);
 342 }
 343
 344 void KCategorizedView::Private::drawDraggedItems(QPainter *painter)
 345 {
 346     QStyleOptionViewItemV3 option = listView->viewOptions();
 347     option.state &= ~QStyle::State_MouseOver;
 348     foreach (const QModelIndex &index, listView->selectionModel()->selectedIndexes())
 349     {
 350         const int dx = mousePosition.x() - initialPressPosition.x() + listView->horizontalOffset();
 351         const int dy = mousePosition.y() - initialPressPosition.y() + listView->verticalOffset();
 352
 353         option.rect = visualRect(index);
 354         option.rect.adjust(dx, dy, dx, dy);
 355
 356         if (option.rect.intersects(listView->viewport()->rect()))
 357         {
 358             listView->itemDelegate(index)->paint(painter, option, index);
 359         }
 360     }
 361 }
 362
 363 void KCategorizedView::Private::drawDraggedItems()
 364 {
 365     QRect rectToUpdate;
 366     QRect currentRect;
 367     foreach (const QModelIndex &index, listView->selectionModel()->selectedIndexes())
 368     {
 369         int dx = mousePosition.x() - initialPressPosition.x() + listView->horizontalOffset();
 370         int dy = mousePosition.y() - initialPressPosition.y() + listView->verticalOffset();
 371
 372         currentRect = visualRect(index);
 373         currentRect.adjust(dx, dy, dx, dy);
 374
 375         if (currentRect.intersects(listView->viewport()->rect()))
 376         {
 377             rectToUpdate = rectToUpdate.united(currentRect);
 378         }
 379     }
 380
 381     listView->viewport()->update(lastDraggedItemsRect.united(rectToUpdate));
 382
 383     lastDraggedItemsRect = rectToUpdate;
 384 }
 385
 386
 387 //==============================================================================
 388
 389
 390 KCategorizedView::KCategorizedView(QWidget *parent)
 391     : QListView(parent)
 392     , d(new Private(this))
 393 {
 394 }
 395
 396 KCategorizedView::~KCategorizedView()
 397 {
 398     delete d;
 399 }
 400
 401 void KCategorizedView::setModel(QAbstractItemModel *model)
 402 {
 403     d->lastSelection = QItemSelection();
 404     d->currentViewIndex = QModelIndex();
 405     d->forcedSelectionPosition = 0;
 406     d->elementsInfo.clear();
 407     d->elementsPosition.clear();
 408     d->elementDictionary.clear();
 409     d->invertedElementDictionary.clear();
 410     d->categoriesIndexes.clear();
 411     d->categoriesPosition.clear();
 412     d->categories.clear();
 413     d->intersectedIndexes.clear();
 414     d->sourceModelIndexList.clear();
 415     d->hovered = QModelIndex();
 416     d->mouseButtonPressed = false;
 417
 418     if (d->proxyModel)
 419     {
 420         QObject::disconnect(d->proxyModel,
 421                             SIGNAL(rowsRemoved(QModelIndex,int,int)),
 422                             this, SLOT(rowsRemoved(QModelIndex,int,int)));
 423
 424         QObject::disconnect(d->proxyModel,
 425                             SIGNAL(sortingRoleChanged()),
 426                             this, SLOT(slotSortingRoleChanged()));
 427     }
 428
 429     QListView::setModel(model);
 430
 431     d->proxyModel = dynamic_cast<KSortFilterProxyModel*>(model);
 432
 433     if (d->proxyModel)
 434     {
 435         QObject::connect(d->proxyModel,
 436                          SIGNAL(rowsRemoved(QModelIndex,int,int)),
 437                          this, SLOT(rowsRemoved(QModelIndex,int,int)));
 438
 439         QObject::connect(d->proxyModel,
 440                          SIGNAL(sortingRoleChanged()),
 441                          this, SLOT(slotSortingRoleChanged()));
 442     }
 443 }
 444
 445 QRect KCategorizedView::visualRect(const QModelIndex &index) const
 446 {
 447     if ((viewMode() != KCategorizedView::IconMode) || !d->proxyModel ||
 448         !d->itemCategorizer)
 449     {
 450         return QListView::visualRect(index);
 451     }
 452
 453     if (!qobject_cast<const QSortFilterProxyModel*>(index.model()))
 454     {
 455         return d->visualRect(d->proxyModel->mapFromSource(index));
 456     }
 457
 458     return d->visualRect(index);
 459 }
 460
 461 KItemCategorizer *KCategorizedView::itemCategorizer() const
 462 {
 463     return d->itemCategorizer;
 464 }
 465
 466 void KCategorizedView::setItemCategorizer(KItemCategorizer *itemCategorizer)
 467 {
 468     d->lastSelection = QItemSelection();
 469     d->currentViewIndex = QModelIndex();
 470     d->forcedSelectionPosition = 0;
 471     d->elementsInfo.clear();
 472     d->elementsPosition.clear();
 473     d->elementDictionary.clear();
 474     d->invertedElementDictionary.clear();
 475     d->categoriesIndexes.clear();
 476     d->categoriesPosition.clear();
 477     d->categories.clear();
 478     d->intersectedIndexes.clear();
 479     d->sourceModelIndexList.clear();
 480     d->hovered = QModelIndex();
 481     d->mouseButtonPressed = false;
 482
 483     if (!itemCategorizer && d->proxyModel)
 484     {
 485         QObject::disconnect(d->proxyModel,
 486                             SIGNAL(rowsRemoved(QModelIndex,int,int)),
 487                             this, SLOT(rowsRemoved(QModelIndex,int,int)));
 488
 489         QObject::disconnect(d->proxyModel,
 490                             SIGNAL(sortingRoleChanged()),
 491                             this, SLOT(slotSortingRoleChanged()));
 492     }
 493     else if (itemCategorizer && d->proxyModel)
 494     {
 495         QObject::connect(d->proxyModel,
 496                          SIGNAL(rowsRemoved(QModelIndex,int,int)),
 497                          this, SLOT(rowsRemoved(QModelIndex,int,int)));
 498
 499         QObject::connect(d->proxyModel,
 500                          SIGNAL(sortingRoleChanged()),
 501                          this, SLOT(slotSortingRoleChanged()));
 502     }
 503
 504     d->itemCategorizer = itemCategorizer;
 505
 506     if (itemCategorizer)
 507     {
 508         rowsInserted(QModelIndex(), 0, d->proxyModel->rowCount() - 1);
 509     }
 510     else
 511     {
 512         updateGeometries();
 513     }
 514 }
 515
 516 QModelIndex KCategorizedView::indexAt(const QPoint &point) const
 517 {
 518     if ((viewMode() != KCategorizedView::IconMode) || !d->proxyModel ||
 519         !d->itemCategorizer)
 520     {
 521         return QListView::indexAt(point);
 522     }
 523
 524     QModelIndex index;
 525
 526     QModelIndexList item = d->intersectionSet(QRect(point, point));
 527
 528     if (item.count() == 1)
 529     {
 530         index = item[0];
 531     }
 532
 533     d->hovered = index;
 534
 535     return index;
 536 }
 537
 538 void KCategorizedView::reset()
 539 {
 540     QListView::reset();
 541
 542     d->lastSelection = QItemSelection();
 543     d->currentViewIndex = QModelIndex();
 544     d->forcedSelectionPosition = 0;
 545     d->elementsInfo.clear();
 546     d->elementsPosition.clear();
 547     d->elementDictionary.clear();
 548     d->invertedElementDictionary.clear();
 549     d->categoriesIndexes.clear();
 550     d->categoriesPosition.clear();
 551     d->categories.clear();
 552     d->intersectedIndexes.clear();
 553     d->sourceModelIndexList.clear();
 554     d->hovered = QModelIndex();
 555     d->mouseButtonPressed = false;
 556 }
 557
 558 void KCategorizedView::paintEvent(QPaintEvent *event)
 559 {
 560     if ((viewMode() != KCategorizedView::IconMode) || !d->proxyModel ||
 561         !d->itemCategorizer)
 562     {
 563         QListView::paintEvent(event);
 564         return;
 565     }
 566
 567     QStyleOptionViewItemV3 option = viewOptions();
 568     option.widget = this;
 569     QPainter painter(viewport());
 570     QRect area = event->rect();
 571     const bool focus = (hasFocus() || viewport()->hasFocus()) &&
 572                         currentIndex().isValid();
 573     const QStyle::State state = option.state;
 574     const bool enabled = (state & QStyle::State_Enabled) != 0;
 575
 576     painter.save();
 577
 578     QModelIndexList dirtyIndexes = d->intersectionSet(area);
 579     foreach (const QModelIndex &index, dirtyIndexes)
 580     {
 581         option.state = state;
 582         option.rect = d->visualRect(index);
 583
 584         if (selectionModel() && selectionModel()->isSelected(index))
 585         {
 586             option.state |= QStyle::State_Selected;
 587         }
 588
 589         if (enabled)
 590         {
 591             QPalette::ColorGroup cg;
 592             if ((d->proxyModel->flags(index) & Qt::ItemIsEnabled) == 0)
 593             {
 594                 option.state &= ~QStyle::State_Enabled;
 595                 cg = QPalette::Disabled;
 596             }
 597             else
 598             {
 599                 cg = QPalette::Normal;
 600             }
 601             option.palette.setCurrentColorGroup(cg);
 602         }
 603
 604         if (focus && currentIndex() == index)
 605         {
 606             option.state |= QStyle::State_HasFocus;
 607             if (this->state() == EditingState)
 608                 option.state |= QStyle::State_Editing;
 609         }
 610
 611         if ((index == d->hovered) && !d->mouseButtonPressed)
 612             option.state |= QStyle::State_MouseOver;
 613         else
 614             option.state &= ~QStyle::State_MouseOver;
 615
 616         itemDelegate(index)->paint(&painter, option, index);
 617     }
 618
 619     // Redraw categories
 620     int i = 0;
 621     QStyleOptionViewItem otherOption;
 622     foreach (const QString &category, d->categories)
 623     {
 624         otherOption = option;
 625         otherOption.rect = d->categoryVisualRect(category);
 626         otherOption.state &= ~QStyle::State_MouseOver;
 627
 628         if (otherOption.rect.intersects(area))
 629         {
 630             d->drawNewCategory(d->categoriesIndexes[category][0],
 631                                d->proxyModel->sortRole(), otherOption, &painter);
 632         }
 633     }
 634
 635     if (d->mouseButtonPressed && !d->isDragging)
 636     {
 637         QPoint start, end, initialPressPosition;
 638
 639         initialPressPosition = d->initialPressPosition;
 640
 641         initialPressPosition.setY(initialPressPosition.y() - verticalOffset());
 642         initialPressPosition.setX(initialPressPosition.x() - horizontalOffset());
 643
 644         if (d->initialPressPosition.x() > d->mousePosition.x() ||
 645             d->initialPressPosition.y() > d->mousePosition.y())
 646         {
 647             start = d->mousePosition;
 648             end = initialPressPosition;
 649         }
 650         else
 651         {
 652             start = initialPressPosition;
 653             end = d->mousePosition;
 654         }
 655
 656         QStyleOptionRubberBand yetAnotherOption;
 657         yetAnotherOption.initFrom(this);
 658         yetAnotherOption.shape = QRubberBand::Rectangle;
 659         yetAnotherOption.opaque = false;
 660         yetAnotherOption.rect = QRect(start, end).intersected(viewport()->rect().adjusted(-16, -16, 16, 16));
 661         painter.save();
 662         style()->drawControl(QStyle::CE_RubberBand, &yetAnotherOption, &painter);
 663         painter.restore();
 664     }
 665
 666     if (d->isDragging && !d->dragLeftViewport)
 667     {
 668         painter.setOpacity(0.5);
 669         d->drawDraggedItems(&painter);
 670     }
 671
 672     painter.restore();
 673 }
 674
 675 void KCategorizedView::resizeEvent(QResizeEvent *event)
 676 {
 677     QListView::resizeEvent(event);
 678
 679     // Clear the items positions cache
 680     d->elementsPosition.clear();
 681     d->categoriesPosition.clear();
 682     d->forcedSelectionPosition = 0;
 683
 684     if ((viewMode() != KCategorizedView::IconMode) || !d->proxyModel ||
 685         !d->itemCategorizer)
 686     {
 687         return;
 688     }
 689
 690     d->updateScrollbars();
 691 }
 692
 693 void KCategorizedView::setSelection(const QRect &rect,
 694                                     QItemSelectionModel::SelectionFlags flags)
 695 {
 696     if ((viewMode() != KCategorizedView::IconMode) || !d->proxyModel ||
 697         !d->itemCategorizer)
 698     {
 699         QListView::setSelection(rect, flags);
 700         return;
 701     }
 702
 703     if (!flags)
 704         return;
 705
 706     selectionModel()->clear();
 707
 708     if (flags & QItemSelectionModel::Clear)
 709     {
 710         d->lastSelection = QItemSelection();
 711     }
 712
 713     QModelIndexList dirtyIndexes = d->intersectionSet(rect);
 714
 715     QItemSelection selection;
 716
 717     if (!dirtyIndexes.count())
 718     {
 719         if (d->lastSelection.count())
 720         {
 721             selectionModel()->select(d->lastSelection, flags);
 722         }
 723
 724         return;
 725     }
 726
 727     if (!d->mouseButtonPressed)
 728     {
 729         selection = QItemSelection(dirtyIndexes[0], dirtyIndexes[0]);
 730         d->currentViewIndex = dirtyIndexes[0];
 731     }
 732     else
 733     {
 734         QModelIndex first = dirtyIndexes[0];
 735         QModelIndex last;
 736         foreach (const QModelIndex &index, dirtyIndexes)
 737         {
 738             if (last.isValid() && last.row() + 1 != index.row())
 739             {
 740                 QItemSelectionRange range(first, last);
 741
 742                 selection << range;
 743
 744                 first = index;
 745             }
 746
 747             last = index;
 748         }
 749
 750         if (last.isValid())
 751             selection << QItemSelectionRange(first, last);
 752     }
 753
 754     if (d->lastSelection.count() && !d->mouseButtonPressed)
 755     {
 756         selection.merge(d->lastSelection, flags);
 757     }
 758     else if (d->lastSelection.count())
 759     {
 760         selection.merge(d->lastSelection, QItemSelectionModel::Select);
 761     }
 762
 763     selectionModel()->select(selection, flags);
 764 }
 765
 766 void KCategorizedView::mouseMoveEvent(QMouseEvent *event)
 767 {
 768     QListView::mouseMoveEvent(event);
 769
 770     if ((viewMode() != KCategorizedView::IconMode) || !d->proxyModel ||
 771         !d->itemCategorizer)
 772     {
 773         return;
 774     }
 775
 776     const QString previousHoveredCategory = d->hoveredCategory;
 777
 778     d->mousePosition = event->pos();
 779     d->hoveredCategory = QString();
 780
 781     // Redraw categories
 782     foreach (const QString &category, d->categories)
 783     {
 784         if (d->categoryVisualRect(category).intersects(QRect(event->pos(), event->pos())))
 785         {
 786             d->hoveredCategory = category;
 787             viewport()->update(d->categoryVisualRect(category));
 788         }
 789         else if ((category == previousHoveredCategory) &&
 790                  (!d->categoryVisualRect(previousHoveredCategory).intersects(QRect(event->pos(), event->pos()))))
 791         {
 792             viewport()->update(d->categoryVisualRect(category));
 793         }
 794     }
 795
 796     QRect rect;
 797     if (d->mouseButtonPressed && !d->isDragging)
 798     {
 799         QPoint start, end, initialPressPosition;
 800
 801         initialPressPosition = d->initialPressPosition;
 802
 803         initialPressPosition.setY(initialPressPosition.y() - verticalOffset());
 804         initialPressPosition.setX(initialPressPosition.x() - horizontalOffset());
 805
 806         if (d->initialPressPosition.x() > d->mousePosition.x() ||
 807             d->initialPressPosition.y() > d->mousePosition.y())
 808         {
 809             start = d->mousePosition;
 810             end = initialPressPosition;
 811         }
 812         else
 813         {
 814             start = initialPressPosition;
 815             end = d->mousePosition;
 816         }
 817
 818         rect = QRect(start, end).intersected(viewport()->rect().adjusted(-16, -16, 16, 16));
 819
 820         //viewport()->update(rect.united(d->lastSelectionRect));
 821
 822         d->lastSelectionRect = rect;
 823     }
 824 }
 825
 826 void KCategorizedView::mousePressEvent(QMouseEvent *event)
 827 {
 828     d->dragLeftViewport = false;
 829
 830     if (event->button() == Qt::LeftButton)
 831     {
 832         d->mouseButtonPressed = true;
 833
 834         d->initialPressPosition = event->pos();
 835         d->initialPressPosition.setY(d->initialPressPosition.y() +
 836                                                               verticalOffset());
 837         d->initialPressPosition.setX(d->initialPressPosition.x() +
 838                                                             horizontalOffset());
 839     }
 840
 841     QListView::mousePressEvent(event);
 842 }
 843
 844 void KCategorizedView::mouseReleaseEvent(QMouseEvent *event)
 845 {
 846     d->mouseButtonPressed = false;
 847
 848     QListView::mouseReleaseEvent(event);
 849
 850     if ((viewMode() != KCategorizedView::IconMode) || !d->proxyModel ||
 851         !d->itemCategorizer)
 852     {
 853         return;
 854     }
 855
 856     QPoint initialPressPosition = viewport()->mapFromGlobal(QCursor::pos());
 857     initialPressPosition.setY(initialPressPosition.y() + verticalOffset());
 858     initialPressPosition.setX(initialPressPosition.x() + horizontalOffset());
 859
 860     QItemSelection selection;
 861
 862     if (initialPressPosition == d->initialPressPosition)
 863     {
 864         foreach(const QString &category, d->categories)
 865         {
 866             if (d->categoryVisualRect(category).contains(event->pos()))
 867             {
 868                 foreach (const QModelIndex &index, d->categoriesIndexes[category])
 869                 {
 870                     selection << QItemSelectionRange(d->proxyModel->mapFromSource(index));
 871                 }
 872
 873                 selectionModel()->select(selection, QItemSelectionModel::Select);
 874
 875                 break;
 876             }
 877         }
 878     }
 879
 880     d->lastSelection = selectionModel()->selection();
 881
 882     if (d->hovered.isValid())
 883         viewport()->update(d->visualRect(d->hovered));
 884     else if (!d->hoveredCategory.isEmpty())
 885         viewport()->update(d->categoryVisualRect(d->hoveredCategory));
 886 }
 887
 888 void KCategorizedView::leaveEvent(QEvent *event)
 889 {
 890     d->hovered = QModelIndex();
 891     d->hoveredCategory = QString();
 892
 893     QListView::leaveEvent(event);
 894 }
 895
 896 void KCategorizedView::startDrag(Qt::DropActions supportedActions)
 897 {
 898     QListView::startDrag(supportedActions);
 899
 900     d->isDragging = false;
 901     d->mouseButtonPressed = false;
 902
 903     viewport()->update(d->lastDraggedItemsRect);
 904 }
 905
 906 void KCategorizedView::dragMoveEvent(QDragMoveEvent *event)
 907 {
 908     d->mousePosition = event->pos();
 909
 910     if (d->mouseButtonPressed)
 911     {
 912         d->isDragging = true;
 913     }
 914     else
 915     {
 916         d->isDragging = false;
 917     }
 918
 919     d->dragLeftViewport = false;
 920
 921     if ((viewMode() != KCategorizedView::IconMode) || !d->proxyModel ||
 922         !d->itemCategorizer)
 923     {
 924         QListView::dragMoveEvent(event);
 925         return;
 926     }
 927
 928     d->drawDraggedItems();
 929 }
 930
 931 void KCategorizedView::dragLeaveEvent(QDragLeaveEvent *event)
 932 {
 933     d->dragLeftViewport = true;
 934
 935     QListView::dragLeaveEvent(event);
 936 }
 937
 938 QModelIndex KCategorizedView::moveCursor(CursorAction cursorAction,
 939                                   Qt::KeyboardModifiers modifiers)
 940 {
 941     if ((viewMode() != KCategorizedView::IconMode) || !d->proxyModel ||
 942         !d->itemCategorizer)
 943     {
 944         return QListView::moveCursor(cursorAction, modifiers);
 945     }
 946
 947     const QModelIndex current = selectionModel()->currentIndex();
 948
 949     int viewportWidth = viewport()->width() - spacing();
 950     // We really need all items to be of same size. Otherwise we cannot do this
 951     // (ereslibre)
 952     // QSize itemSize = listView->sizeHintForIndex(index);
 953     // int itemHeight = itemSize.height();
 954     // int itemWidth = itemSize.width();
 955     int itemHeight = 107;
 956     int itemWidth = 130;
 957     int itemWidthPlusSeparation = spacing() + itemWidth;
 958     int elementsPerRow = viewportWidth / itemWidthPlusSeparation;
 959
 960     QString lastCategory = d->categories[0];
 961     QString theCategory = d->categories[0];
 962     QString afterCategory = d->categories[0];
 963     bool hasToBreak = false;
 964     foreach (const QString &category, d->categories)
 965     {
 966         if (hasToBreak)
 967         {
 968             afterCategory = category;
 969
 970             break;
 971         }
 972
 973         if (category == d->elementsInfo[d->proxyModel->mapToSource(current)].category)
 974         {
 975             theCategory = category;
 976
 977             hasToBreak = true;
 978         }
 979
 980         if (!hasToBreak)
 981         {
 982             lastCategory = category;
 983         }
 984     }
 985
 986     switch (cursorAction)
 987     {
 988         case QAbstractItemView::MoveUp: {
 989             if (d->elementsInfo[d->proxyModel->mapToSource(current)].relativeOffsetToCategory >= elementsPerRow)
 990             {
 991                 int indexToMove = d->invertedElementDictionary[current].row();
 992                 indexToMove -= qMin(((d->elementsInfo[d->proxyModel->mapToSource(current)].relativeOffsetToCategory) + d->forcedSelectionPosition), elementsPerRow - d->forcedSelectionPosition + (d->elementsInfo[d->proxyModel->mapToSource(current)].relativeOffsetToCategory % elementsPerRow));
 993
 994                 return d->elementDictionary[d->proxyModel->index(indexToMove, 0)];
 995             }
 996             else
 997             {
 998                 int lastCategoryLastRow = (d->categoriesIndexes[lastCategory].count() - 1) % elementsPerRow;
 999                 int indexToMove = d->invertedElementDictionary[current].row() - d->elementsInfo[d->proxyModel->mapToSource(current)].relativeOffsetToCategory;
1000
1001                 if (d->forcedSelectionPosition >= lastCategoryLastRow)
1002                 {
1003                     indexToMove -= 1;
1004                 }
1005                 else
1006                 {
1007                     indexToMove -= qMin((lastCategoryLastRow - d->forcedSelectionPosition + 1), d->forcedSelectionPosition + elementsPerRow + 1);
1008                 }
1009
1010                 return d->elementDictionary[d->proxyModel->index(indexToMove, 0)];
1011             }
1012         }
1013
1014         case QAbstractItemView::MoveDown: {
1015             if (d->elementsInfo[d->proxyModel->mapToSource(current)].relativeOffsetToCategory < (d->categoriesIndexes[theCategory].count() - 1 - ((d->categoriesIndexes[theCategory].count() - 1) % elementsPerRow)))
1016             {
1017                 int indexToMove = d->invertedElementDictionary[current].row();
1018                 indexToMove += qMin(elementsPerRow, d->categoriesIndexes[theCategory].count() - 1 - d->elementsInfo[d->proxyModel->mapToSource(current)].relativeOffsetToCategory);
1019
1020                 return d->elementDictionary[d->proxyModel->index(indexToMove, 0)];
1021             }
1022             else
1023             {
1024                 int afterCategoryLastRow = qMin(elementsPerRow, d->categoriesIndexes[afterCategory].count());
1025                 int indexToMove = d->invertedElementDictionary[current].row() + (d->categoriesIndexes[theCategory].count() - d->elementsInfo[d->proxyModel->mapToSource(current)].relativeOffsetToCategory);
1026
1027                 if (d->forcedSelectionPosition >= afterCategoryLastRow)
1028                 {
1029                     indexToMove += afterCategoryLastRow - 1;
1030                 }
1031                 else
1032                 {
1033                     indexToMove += qMin(d->forcedSelectionPosition, elementsPerRow);
1034                 }
1035
1036                 return d->elementDictionary[d->proxyModel->index(indexToMove, 0)];
1037             }
1038         }
1039
1040         case QAbstractItemView::MoveLeft:
1041             d->forcedSelectionPosition = d->elementsInfo[d->proxyModel->mapToSource(d->elementDictionary[d->proxyModel->index(d->invertedElementDictionary[current].row() - 1, 0)])].relativeOffsetToCategory % elementsPerRow;
1042
1043             if (d->forcedSelectionPosition < 0)
1044                 d->forcedSelectionPosition = (d->categoriesIndexes[theCategory].count() - 1) % elementsPerRow;
1045
1046             return d->elementDictionary[d->proxyModel->index(d->invertedElementDictionary[current].row() - 1, 0)];
1047
1048         case QAbstractItemView::MoveRight:
1049             d->forcedSelectionPosition = d->elementsInfo[d->proxyModel->mapToSource(d->elementDictionary[d->proxyModel->index(d->invertedElementDictionary[current].row() + 1, 0)])].relativeOffsetToCategory % elementsPerRow;
1050
1051             if (d->forcedSelectionPosition < 0)
1052                 d->forcedSelectionPosition = (d->categoriesIndexes[theCategory].count() - 1) % elementsPerRow;
1053
1054             return d->elementDictionary[d->proxyModel->index(d->invertedElementDictionary[current].row() + 1, 0)];
1055
1056         default:
1057             break;
1058     }
1059
1060     return QListView::moveCursor(cursorAction, modifiers);
1061 }
1062
1063 void KCategorizedView::rowsInserted(const QModelIndex &parent,
1064                              int start,
1065                              int end)
1066 {
1067     QListView::rowsInserted(parent, start, end);
1068
1069     if ((viewMode() != KCategorizedView::IconMode) || !d->proxyModel ||
1070         !d->itemCategorizer)
1071     {
1072         d->lastSelection = QItemSelection();
1073         d->currentViewIndex = QModelIndex();
1074         d->forcedSelectionPosition = 0;
1075         d->elementsInfo.clear();
1076         d->elementsPosition.clear();
1077         d->elementDictionary.clear();
1078         d->invertedElementDictionary.clear();
1079         d->categoriesIndexes.clear();
1080         d->categoriesPosition.clear();
1081         d->categories.clear();
1082         d->intersectedIndexes.clear();
1083         d->sourceModelIndexList.clear();
1084         d->hovered = QModelIndex();
1085         d->mouseButtonPressed = false;
1086
1087         return;
1088     }
1089
1090     rowsInsertedArtifficial(parent, start, end);
1091 }
1092
1093 void KCategorizedView::rowsInsertedArtifficial(const QModelIndex &parent,
1094                                         int start,
1095                                         int end)
1096 {
1097     Q_UNUSED(parent);
1098
1099     d->lastSelection = QItemSelection();
1100     d->currentViewIndex = QModelIndex();
1101     d->forcedSelectionPosition = 0;
1102     d->elementsInfo.clear();
1103     d->elementsPosition.clear();
1104     d->elementDictionary.clear();
1105     d->invertedElementDictionary.clear();
1106     d->categoriesIndexes.clear();
1107     d->categoriesPosition.clear();
1108     d->categories.clear();
1109     d->intersectedIndexes.clear();
1110     d->sourceModelIndexList.clear();
1111     d->hovered = QModelIndex();
1112     d->mouseButtonPressed = false;
1113
1114     if (start > end || end < 0 || start < 0 || !d->proxyModel->rowCount())
1115     {
1116         return;
1117     }
1118
1119     // Add all elements mapped to the source model
1120     for (int k = 0; k < d->proxyModel->rowCount(); k++)
1121     {
1122         d->sourceModelIndexList <<
1123                          d->proxyModel->mapToSource(d->proxyModel->index(k, 0));
1124     }
1125
1126     // Sort them with the general purpose lessThan method
1127     LessThan generalLessThan(d->proxyModel,
1128                              LessThan::GeneralPurpose);
1129
1130     qStableSort(d->sourceModelIndexList.begin(), d->sourceModelIndexList.end(),
1131                 generalLessThan);
1132
1133     // Explore categories
1134     QString prevCategory =
1135                  d->itemCategorizer->categoryForItem(d->sourceModelIndexList[0],
1136                                                      d->proxyModel->sortRole());
1137     QString lastCategory = prevCategory;
1138     QModelIndexList modelIndexList;
1139     struct Private::ElementInfo elementInfo;
1140     foreach (const QModelIndex &index, d->sourceModelIndexList)
1141     {
1142         lastCategory = d->itemCategorizer->categoryForItem(index,
1143                                                      d->proxyModel->sortRole());
1144
1145         elementInfo.category = lastCategory;
1146
1147         if (prevCategory != lastCategory)
1148         {
1149             d->categoriesIndexes.insert(prevCategory, modelIndexList);
1150             d->categories << prevCategory;
1151             modelIndexList.clear();
1152         }
1153
1154         modelIndexList << index;
1155         prevCategory = lastCategory;
1156
1157         d->elementsInfo.insert(index, elementInfo);
1158     }
1159
1160     d->categoriesIndexes.insert(prevCategory, modelIndexList);
1161     d->categories << prevCategory;
1162
1163     // Sort items locally in their respective categories with the category
1164     // purpose lessThan
1165     LessThan categoryLessThan(d->proxyModel,
1166                               LessThan::CategoryPurpose);
1167
1168     foreach (const QString &key, d->categories)
1169     {
1170         QModelIndexList &indexList = d->categoriesIndexes[key];
1171
1172         qStableSort(indexList.begin(), indexList.end(), categoryLessThan);
1173     }
1174
1175     d->lastIndex = d->categoriesIndexes[d->categories[d->categories.count() - 1]][d->categoriesIndexes[d->categories[d->categories.count() - 1]].count() - 1];
1176
1177     // Finally, fill data information of items situation. This will help when
1178     // trying to compute an item place in the viewport
1179     int i = 0; // position relative to the category beginning
1180     int j = 0; // number of elements before current
1181     foreach (const QString &key, d->categories)
1182     {
1183         foreach (const QModelIndex &index, d->categoriesIndexes[key])
1184         {
1185             struct Private::ElementInfo &elementInfo = d->elementsInfo[index];
1186
1187             elementInfo.relativeOffsetToCategory = i;
1188
1189             d->elementDictionary.insert(d->proxyModel->index(j, 0),
1190                                         d->proxyModel->mapFromSource(index));
1191
1192             d->invertedElementDictionary.insert(d->proxyModel->mapFromSource(index),
1193                                                 d->proxyModel->index(j, 0));
1194
1195             i++;
1196             j++;
1197         }
1198
1199         i = 0;
1200     }
1201
1202     d->updateScrollbars();
1203 }
1204
1205 void KCategorizedView::rowsRemoved(const QModelIndex &parent,
1206                             int start,
1207                             int end)
1208 {
1209     if ((viewMode() == KCategorizedView::IconMode) && d->proxyModel &&
1210         d->itemCategorizer)
1211     {
1212         // Force the view to update all elements
1213         rowsInsertedArtifficial(parent, start, end);
1214     }
1215 }
1216
1217 void KCategorizedView::updateGeometries()
1218 {
1219     if ((viewMode() != KCategorizedView::IconMode) || !d->proxyModel ||
1220         !d->itemCategorizer)
1221     {
1222         QListView::updateGeometries();
1223         return;
1224     }
1225
1226     // Avoid QListView::updateGeometries(), since it will try to set another
1227     // range to our scroll bars, what we don't want (ereslibre)
1228     QAbstractItemView::updateGeometries();
1229 }
1230
1231 void KCategorizedView::slotSortingRoleChanged()
1232 {
1233     if ((viewMode() == KCategorizedView::IconMode) && d->proxyModel &&
1234         d->itemCategorizer)
1235     {
1236         // Force the view to update all elements
1237         rowsInsertedArtifficial(QModelIndex(), 0, d->proxyModel->rowCount() - 1);
1238     }
1239 }
1240
1241 #include "kcategorizedview.moc"