src/kcategorizedview.cpp

   1 /**
   2   * This file is part of the KDE project
   3   * Copyright (C) 2007 Rafael Fernández López <ereslibre@kde.org>
   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 <kstyle.h>
  33
  34 #include "kcategorydrawer.h"
  35 #include "kcategorizedsortfilterproxymodel.h"
  36
  37 KCategorizedView::Private::Private(KCategorizedView *listView)
  38     : listView(listView)
  39     , categoryDrawer(0)
  40     , biggestItemSize(QSize(0, 0))
  41     , mouseButtonPressed(false)
  42     , isDragging(false)
  43     , dragLeftViewport(false)
  44     , proxyModel(0)
  45 {
  46 }
  47
  48 KCategorizedView::Private::~Private()
  49 {
  50 }
  51
  52 const QModelIndexList &KCategorizedView::Private::intersectionSet(const QRect &rect)
  53 {
  54     QModelIndex index;
  55     QRect indexVisualRect;
  56
  57     intersectedIndexes.clear();
  58
  59     int itemHeight;
  60
  61     if (listView->gridSize().isEmpty())
  62     {
  63         itemHeight = biggestItemSize.height();
  64     }
  65     else
  66     {
  67         itemHeight = listView->gridSize().height();
  68     }
  69
  70     // Lets find out where we should start
  71     int top = proxyModel->rowCount() - 1;
  72     int bottom = 0;
  73     int middle = (top + bottom) / 2;
  74     while (bottom <= top)
  75     {
  76         middle = (top + bottom) / 2;
  77
  78         index = proxyModel->index(middle, 0);
  79         indexVisualRect = visualRect(index);
  80         // We need the whole height (not only the visualRect). This will help us to update
  81         // all needed indexes correctly (ereslibre)
  82         indexVisualRect.setHeight(indexVisualRect.height() + (itemHeight - indexVisualRect.height()));
  83
  84         if (qMax(indexVisualRect.topLeft().y(),
  85                  indexVisualRect.bottomRight().y()) < qMin(rect.topLeft().y(),
  86                                                            rect.bottomRight().y()))
  87         {
  88             bottom = middle + 1;
  89         }
  90         else
  91         {
  92             top = middle - 1;
  93         }
  94     }
  95
  96     for (int i = middle; i < proxyModel->rowCount(); i++)
  97     {
  98         index = proxyModel->index(i, 0);
  99         indexVisualRect = visualRect(index);
 100
 101         if (rect.intersects(indexVisualRect))
 102             intersectedIndexes.append(index);
 103
 104         // If we passed next item, stop searching for hits
 105         if (qMax(rect.bottomRight().y(), rect.topLeft().y()) <
 106                                                   qMin(indexVisualRect.topLeft().y(),
 107                                                        indexVisualRect.bottomRight().y()))
 108             break;
 109     }
 110
 111     return intersectedIndexes;
 112 }
 113
 114 QRect KCategorizedView::Private::visualRectInViewport(const QModelIndex &index) const
 115 {
 116     if (!index.isValid())
 117         return QRect();
 118
 119     QString curCategory = elementsInfo[index.row()].category;
 120
 121     QRect retRect;
 122
 123     if (listView->layoutDirection() == Qt::LeftToRight)
 124     {
 125         retRect = QRect(listView->spacing(), listView->spacing() * 2 +
 126                         categoryDrawer->categoryHeight(listView->viewOptions()), 0, 0);
 127     }
 128     else
 129     {
 130         retRect = QRect(listView->viewport()->width() - listView->spacing(), listView->spacing() * 2 +
 131                         categoryDrawer->categoryHeight(listView->viewOptions()), 0, 0);
 132     }
 133
 134     int viewportWidth = listView->viewport()->width() - listView->spacing();
 135
 136     int itemHeight;
 137     int itemWidth;
 138
 139     if (listView->gridSize().isEmpty())
 140     {
 141         itemHeight = biggestItemSize.height();
 142         itemWidth = biggestItemSize.width();
 143     }
 144     else
 145     {
 146         itemHeight = listView->gridSize().height();
 147         itemWidth = listView->gridSize().width();
 148     }
 149
 150     int itemWidthPlusSeparation = listView->spacing() + itemWidth;
 151     int elementsPerRow = viewportWidth / itemWidthPlusSeparation;
 152     if (!elementsPerRow)
 153         elementsPerRow++;
 154
 155     int column = elementsInfo[index.row()].relativeOffsetToCategory % elementsPerRow;
 156     int row = elementsInfo[index.row()].relativeOffsetToCategory / elementsPerRow;
 157
 158     if (listView->layoutDirection() == Qt::LeftToRight)
 159     {
 160         retRect.setLeft(retRect.left() + column * listView->spacing() +
 161                         column * itemWidth);
 162     }
 163     else
 164     {
 165         retRect.setLeft(retRect.right() - column * listView->spacing() -
 166                          column * itemWidth - itemWidth);
 167
 168         retRect.setRight(retRect.right() - column * listView->spacing() -
 169                          column * itemWidth);
 170     }
 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
 180         int rowsInt = categoriesIndexes[category].count() / elementsPerRow;
 181
 182         if (rows - trunc(rows)) rowsInt++;
 183
 184         retRect.setTop(retRect.top() +
 185                        (rowsInt * itemHeight) +
 186                        categoryDrawer->categoryHeight(listView->viewOptions()) +
 187                        listView->spacing() * 2);
 188
 189         if (listView->gridSize().isEmpty())
 190         {
 191             retRect.setTop(retRect.top() +
 192                            (rowsInt * listView->spacing()));
 193         }
 194     }
 195
 196     if (listView->gridSize().isEmpty())
 197     {
 198         retRect.setTop(retRect.top() + row * listView->spacing() +
 199                        (row * itemHeight));
 200     }
 201     else
 202     {
 203         retRect.setTop(retRect.top() + (row * itemHeight));
 204     }
 205
 206     retRect.setWidth(itemWidth);
 207
 208     QModelIndex heightIndex = proxyModel->index(index.row(), 0);
 209     if (listView->gridSize().isEmpty())
 210     {
 211         retRect.setHeight(listView->sizeHintForIndex(heightIndex).height());
 212     }
 213     else
 214     {
 215         retRect.setHeight(qMin(listView->sizeHintForIndex(heightIndex).height(),
 216                                listView->gridSize().height()));
 217     }
 218
 219     return retRect;
 220 }
 221
 222 QRect KCategorizedView::Private::visualCategoryRectInViewport(const QString &category)
 223                                                                            const
 224 {
 225     QRect retRect(listView->spacing(),
 226                   listView->spacing(),
 227                   listView->viewport()->width() - listView->spacing() * 2,
 228                   0);
 229
 230     if (!proxyModel->rowCount() || !categories.contains(category))
 231         return QRect();
 232
 233     QModelIndex index = proxyModel->index(0, 0, QModelIndex());
 234
 235     int viewportWidth = listView->viewport()->width() - listView->spacing();
 236
 237     int itemHeight;
 238     int itemWidth;
 239
 240     if (listView->gridSize().isEmpty())
 241     {
 242         itemHeight = biggestItemSize.height();
 243         itemWidth = biggestItemSize.width();
 244     }
 245     else
 246     {
 247         itemHeight = listView->gridSize().height();
 248         itemWidth = listView->gridSize().width();
 249     }
 250
 251     int itemWidthPlusSeparation = listView->spacing() + itemWidth;
 252     int elementsPerRow = viewportWidth / itemWidthPlusSeparation;
 253
 254     if (!elementsPerRow)
 255         elementsPerRow++;
 256
 257     foreach (const QString &itCategory, categories)
 258     {
 259         if (itCategory == category)
 260             break;
 261
 262         float rows = (float) ((float) categoriesIndexes[itCategory].count() /
 263                               (float) elementsPerRow);
 264         int rowsInt = categoriesIndexes[itCategory].count() / elementsPerRow;
 265
 266         if (rows - trunc(rows)) rowsInt++;
 267
 268         retRect.setTop(retRect.top() +
 269                        (rowsInt * itemHeight) +
 270                        categoryDrawer->categoryHeight(listView->viewOptions()) +
 271                        listView->spacing() * 2);
 272
 273         if (listView->gridSize().isEmpty())
 274         {
 275             retRect.setTop(retRect.top() +
 276                            (rowsInt * listView->spacing()));
 277         }
 278     }
 279
 280     retRect.setHeight(categoryDrawer->categoryHeight(listView->viewOptions()));
 281
 282     return retRect;
 283 }
 284
 285 // We're sure elementsPosition doesn't contain index
 286 const QRect &KCategorizedView::Private::cacheIndex(const QModelIndex &index)
 287 {
 288     QRect rect = visualRectInViewport(index);
 289     elementsPosition[index.row()] = rect;
 290
 291     return elementsPosition[index.row()];
 292 }
 293
 294 // We're sure categoriesPosition doesn't contain category
 295 const QRect &KCategorizedView::Private::cacheCategory(const QString &category)
 296 {
 297     QRect rect = visualCategoryRectInViewport(category);
 298     categoriesPosition[category] = rect;
 299
 300     return categoriesPosition[category];
 301 }
 302
 303 const QRect &KCategorizedView::Private::cachedRectIndex(const QModelIndex &index)
 304 {
 305     if (elementsPosition.contains(index.row())) // If we have it cached
 306     {                                        // return it
 307         return elementsPosition[index.row()];
 308     }
 309     else                                     // Otherwise, cache it
 310     {                                        // and return it
 311         return cacheIndex(index);
 312     }
 313 }
 314
 315 const QRect &KCategorizedView::Private::cachedRectCategory(const QString &category)
 316 {
 317     if (categoriesPosition.contains(category)) // If we have it cached
 318     {                                                // return it
 319         return categoriesPosition[category];
 320     }
 321     else                                            // Otherwise, cache it and
 322     {                                               // return it
 323         return cacheCategory(category);
 324     }
 325 }
 326
 327 QRect KCategorizedView::Private::visualRect(const QModelIndex &index)
 328 {
 329     QRect retRect = cachedRectIndex(index);
 330     int dx = -listView->horizontalOffset();
 331     int dy = -listView->verticalOffset();
 332     retRect.adjust(dx, dy, dx, dy);
 333
 334     return retRect;
 335 }
 336
 337 QRect KCategorizedView::Private::categoryVisualRect(const QString &category)
 338 {
 339     QRect retRect = cachedRectCategory(category);
 340     int dx = -listView->horizontalOffset();
 341     int dy = -listView->verticalOffset();
 342     retRect.adjust(dx, dy, dx, dy);
 343
 344     return retRect;
 345 }
 346
 347 void KCategorizedView::Private::drawNewCategory(const QModelIndex &index,
 348                                                 int sortRole,
 349                                                 const QStyleOption &option,
 350                                                 QPainter *painter)
 351 {
 352     if (!index.isValid())
 353     {
 354         return;
 355     }
 356
 357     QStyleOption optionCopy = option;
 358     const QString category = proxyModel->data(index, KCategorizedSortFilterProxyModel::CategoryRole).toString();
 359
 360     optionCopy.state &= ~QStyle::State_Selected;
 361
 362     if ((category == hoveredCategory) && !mouseButtonPressed)
 363     {
 364         optionCopy.state |= QStyle::State_MouseOver;
 365     }
 366     else if ((category == hoveredCategory) && mouseButtonPressed)
 367     {
 368         QPoint initialPressPosition = listView->viewport()->mapFromGlobal(QCursor::pos());
 369         initialPressPosition.setY(initialPressPosition.y() + listView->verticalOffset());
 370         initialPressPosition.setX(initialPressPosition.x() + listView->horizontalOffset());
 371
 372         if (initialPressPosition == this->initialPressPosition)
 373         {
 374             optionCopy.state |= QStyle::State_Selected;
 375         }
 376     }
 377
 378     categoryDrawer->drawCategory(index,
 379                                  sortRole,
 380                                  optionCopy,
 381                                  painter);
 382 }
 383
 384
 385 void KCategorizedView::Private::updateScrollbars()
 386 {
 387     // find the last index in the last category
 388     QModelIndex lastIndex = categoriesIndexes.isEmpty() ? QModelIndex() : categoriesIndexes[categories.last()].last();
 389
 390     int lastItemBottom = cachedRectIndex(lastIndex).top() +
 391                          listView->spacing() + (listView->gridSize().isEmpty() ? 0 : listView->gridSize().height()) - listView->viewport()->height();
 392
 393     listView->verticalScrollBar()->setSingleStep(listView->viewport()->height() / 10);
 394     listView->verticalScrollBar()->setPageStep(listView->viewport()->height());
 395     listView->verticalScrollBar()->setRange(0, lastItemBottom);
 396 }
 397
 398 void KCategorizedView::Private::drawDraggedItems(QPainter *painter)
 399 {
 400     QStyleOptionViewItemV3 option = listView->viewOptions();
 401     option.state &= ~QStyle::State_MouseOver;
 402     foreach (const QModelIndex &index, listView->selectionModel()->selectedIndexes())
 403     {
 404         const int dx = mousePosition.x() - initialPressPosition.x() + listView->horizontalOffset();
 405         const int dy = mousePosition.y() - initialPressPosition.y() + listView->verticalOffset();
 406
 407         option.rect = visualRect(index);
 408         option.rect.adjust(dx, dy, dx, dy);
 409
 410         if (option.rect.intersects(listView->viewport()->rect()))
 411         {
 412             listView->itemDelegate(index)->paint(painter, option, index);
 413         }
 414     }
 415 }
 416
 417 void KCategorizedView::Private::drawDraggedItems()
 418 {
 419     QRect rectToUpdate;
 420     QRect currentRect;
 421     foreach (const QModelIndex &index, listView->selectionModel()->selectedIndexes())
 422     {
 423         int dx = mousePosition.x() - initialPressPosition.x() + listView->horizontalOffset();
 424         int dy = mousePosition.y() - initialPressPosition.y() + listView->verticalOffset();
 425
 426         currentRect = visualRect(index);
 427         currentRect.adjust(dx, dy, dx, dy);
 428
 429         if (currentRect.intersects(listView->viewport()->rect()))
 430         {
 431             rectToUpdate = rectToUpdate.united(currentRect);
 432         }
 433     }
 434
 435     listView->viewport()->update(lastDraggedItemsRect.united(rectToUpdate));
 436
 437     lastDraggedItemsRect = rectToUpdate;
 438 }
 439
 440
 441 //==============================================================================
 442
 443
 444 KCategorizedView::KCategorizedView(QWidget *parent)
 445     : QListView(parent)
 446     , d(new Private(this))
 447 {
 448 }
 449
 450 KCategorizedView::~KCategorizedView()
 451 {
 452     delete d;
 453 }
 454
 455 void KCategorizedView::setGridSize(const QSize &size)
 456 {
 457     QListView::setGridSize(size);
 458
 459     slotLayoutChanged();
 460 }
 461
 462 void KCategorizedView::setModel(QAbstractItemModel *model)
 463 {
 464     d->lastSelection = QItemSelection();
 465     d->currentViewIndex = QModelIndex();
 466     d->forcedSelectionPosition = 0;
 467     d->elementsInfo.clear();
 468     d->elementsPosition.clear();
 469     d->categoriesIndexes.clear();
 470     d->categoriesPosition.clear();
 471     d->categories.clear();
 472     d->intersectedIndexes.clear();
 473     d->modelIndexList.clear();
 474     d->hovered = QModelIndex();
 475     d->mouseButtonPressed = false;
 476
 477     if (d->proxyModel)
 478     {
 479         QObject::disconnect(d->proxyModel,
 480                             SIGNAL(layoutChanged()),
 481                             this, SLOT(slotLayoutChanged()));
 482
 483         QObject::disconnect(d->proxyModel,
 484                             SIGNAL(dataChanged(QModelIndex,QModelIndex)),
 485                             this, SLOT(slotLayoutChanged()));
 486     }
 487
 488     QListView::setModel(model);
 489
 490     d->proxyModel = dynamic_cast<KCategorizedSortFilterProxyModel*>(model);
 491
 492     if (d->proxyModel)
 493     {
 494         QObject::connect(d->proxyModel,
 495                          SIGNAL(layoutChanged()),
 496                          this, SLOT(slotLayoutChanged()));
 497
 498         QObject::connect(d->proxyModel,
 499                          SIGNAL(dataChanged(QModelIndex,QModelIndex)),
 500                          this, SLOT(slotLayoutChanged()));
 501     }
 502 }
 503
 504 QRect KCategorizedView::visualRect(const QModelIndex &index) const
 505 {
 506     if ((viewMode() != KCategorizedView::IconMode) || !d->proxyModel ||
 507         !d->categoryDrawer || !d->proxyModel->isCategorizedModel())
 508     {
 509         return QListView::visualRect(index);
 510     }
 511
 512     if (!qobject_cast<const QSortFilterProxyModel*>(index.model()))
 513     {
 514         return d->visualRect(d->proxyModel->mapFromSource(index));
 515     }
 516
 517     return d->visualRect(index);
 518 }
 519
 520 KCategoryDrawer *KCategorizedView::categoryDrawer() const
 521 {
 522     return d->categoryDrawer;
 523 }
 524
 525 void KCategorizedView::setCategoryDrawer(KCategoryDrawer *categoryDrawer)
 526 {
 527     d->lastSelection = QItemSelection();
 528     d->currentViewIndex = QModelIndex();
 529     d->forcedSelectionPosition = 0;
 530     d->elementsInfo.clear();
 531     d->elementsPosition.clear();
 532     d->categoriesIndexes.clear();
 533     d->categoriesPosition.clear();
 534     d->categories.clear();
 535     d->intersectedIndexes.clear();
 536     d->modelIndexList.clear();
 537     d->hovered = QModelIndex();
 538     d->mouseButtonPressed = false;
 539
 540     if (!categoryDrawer && d->proxyModel)
 541     {
 542         QObject::disconnect(d->proxyModel,
 543                             SIGNAL(layoutChanged()),
 544                             this, SLOT(slotLayoutChanged()));
 545
 546         QObject::disconnect(d->proxyModel,
 547                             SIGNAL(dataChanged(QModelIndex,QModelIndex)),
 548                             this, SLOT(slotLayoutChanged()));
 549     }
 550     else if (categoryDrawer && d->proxyModel)
 551     {
 552         QObject::connect(d->proxyModel,
 553                          SIGNAL(layoutChanged()),
 554                          this, SLOT(slotLayoutChanged()));
 555
 556         QObject::connect(d->proxyModel,
 557                          SIGNAL(dataChanged(QModelIndex,QModelIndex)),
 558                          this, SLOT(slotLayoutChanged()));
 559     }
 560
 561     d->categoryDrawer = categoryDrawer;
 562
 563     if (categoryDrawer)
 564     {
 565         if (d->proxyModel)
 566         {
 567             rowsInserted(QModelIndex(), 0, d->proxyModel->rowCount() - 1);
 568         }
 569     }
 570     else
 571     {
 572         updateGeometries();
 573     }
 574 }
 575
 576 QModelIndex KCategorizedView::indexAt(const QPoint &point) const
 577 {
 578     if ((viewMode() != KCategorizedView::IconMode) || !d->proxyModel ||
 579         !d->categoryDrawer || !d->proxyModel->isCategorizedModel())
 580     {
 581         return QListView::indexAt(point);
 582     }
 583
 584     QModelIndex index;
 585
 586     QModelIndexList item = d->intersectionSet(QRect(point, point));
 587
 588     if (item.count() == 1)
 589     {
 590         index = item[0];
 591     }
 592
 593     d->hovered = index;
 594
 595     return index;
 596 }
 597
 598 void KCategorizedView::reset()
 599 {
 600     QListView::reset();
 601
 602     d->lastSelection = QItemSelection();
 603     d->currentViewIndex = QModelIndex();
 604     d->forcedSelectionPosition = 0;
 605     d->elementsInfo.clear();
 606     d->elementsPosition.clear();
 607     d->categoriesIndexes.clear();
 608     d->categoriesPosition.clear();
 609     d->categories.clear();
 610     d->intersectedIndexes.clear();
 611     d->modelIndexList.clear();
 612     d->hovered = QModelIndex();
 613     d->biggestItemSize = QSize(0, 0);
 614     d->mouseButtonPressed = false;
 615 }
 616
 617 void KCategorizedView::paintEvent(QPaintEvent *event)
 618 {
 619     if ((viewMode() != KCategorizedView::IconMode) || !d->proxyModel ||
 620         !d->categoryDrawer || !d->proxyModel->isCategorizedModel())
 621     {
 622         QListView::paintEvent(event);
 623         return;
 624     }
 625
 626     QStyleOptionViewItemV3 option = viewOptions();
 627     option.widget = this;
 628     if (wordWrap())
 629     {
 630         option.features |= QStyleOptionViewItemV2::WrapText;
 631     }
 632
 633     QPainter painter(viewport());
 634     QRect area = event->rect();
 635     const bool focus = (hasFocus() || viewport()->hasFocus()) &&
 636                         currentIndex().isValid();
 637     const QStyle::State state = option.state;
 638     const bool enabled = (state & QStyle::State_Enabled) != 0;
 639
 640     painter.save();
 641
 642     QModelIndexList dirtyIndexes = d->intersectionSet(area);
 643     foreach (const QModelIndex &index, dirtyIndexes)
 644     {
 645         option.state = state;
 646         option.rect = visualRect(index);
 647
 648         if (selectionModel() && selectionModel()->isSelected(index))
 649         {
 650             option.state |= QStyle::State_Selected;
 651         }
 652
 653         if (enabled)
 654         {
 655             QPalette::ColorGroup cg;
 656             if ((d->proxyModel->flags(index) & Qt::ItemIsEnabled) == 0)
 657             {
 658                 option.state &= ~QStyle::State_Enabled;
 659                 cg = QPalette::Disabled;
 660             }
 661             else
 662             {
 663                 cg = QPalette::Normal;
 664             }
 665             option.palette.setCurrentColorGroup(cg);
 666         }
 667
 668         if (focus && currentIndex() == index)
 669         {
 670             option.state |= QStyle::State_HasFocus;
 671             if (this->state() == EditingState)
 672                 option.state |= QStyle::State_Editing;
 673         }
 674
 675         if ((index == d->hovered) && !d->mouseButtonPressed)
 676             option.state |= QStyle::State_MouseOver;
 677         else
 678             option.state &= ~QStyle::State_MouseOver;
 679
 680         itemDelegate(index)->paint(&painter, option, index);
 681     }
 682
 683     // Redraw categories
 684     QStyleOptionViewItem otherOption;
 685     foreach (const QString &category, d->categories)
 686     {
 687         otherOption = option;
 688         otherOption.rect = d->categoryVisualRect(category);
 689         otherOption.state &= ~QStyle::State_MouseOver;
 690
 691         if (otherOption.rect.intersects(area))
 692         {
 693             QModelIndex indexToDraw = d->proxyModel->index(d->categoriesIndexes[category][0].row(), d->proxyModel->sortColumn());
 694
 695             d->drawNewCategory(indexToDraw,
 696                                d->proxyModel->sortRole(), otherOption, &painter);
 697         }
 698     }
 699
 700     if (d->mouseButtonPressed && !d->isDragging)
 701     {
 702         QPoint start, end, initialPressPosition;
 703
 704         initialPressPosition = d->initialPressPosition;
 705
 706         initialPressPosition.setY(initialPressPosition.y() - verticalOffset());
 707         initialPressPosition.setX(initialPressPosition.x() - horizontalOffset());
 708
 709         if (d->initialPressPosition.x() > d->mousePosition.x() ||
 710             d->initialPressPosition.y() > d->mousePosition.y())
 711         {
 712             start = d->mousePosition;
 713             end = initialPressPosition;
 714         }
 715         else
 716         {
 717             start = initialPressPosition;
 718             end = d->mousePosition;
 719         }
 720
 721         QStyleOptionRubberBand yetAnotherOption;
 722         yetAnotherOption.initFrom(this);
 723         yetAnotherOption.shape = QRubberBand::Rectangle;
 724         yetAnotherOption.opaque = false;
 725         yetAnotherOption.rect = QRect(start, end).intersected(viewport()->rect().adjusted(-16, -16, 16, 16));
 726         painter.save();
 727         style()->drawControl(QStyle::CE_RubberBand, &yetAnotherOption, &painter);
 728         painter.restore();
 729     }
 730
 731     if (d->isDragging && !d->dragLeftViewport)
 732     {
 733         painter.setOpacity(0.5);
 734         d->drawDraggedItems(&painter);
 735     }
 736
 737     painter.restore();
 738 }
 739
 740 void KCategorizedView::resizeEvent(QResizeEvent *event)
 741 {
 742     QListView::resizeEvent(event);
 743
 744     // Clear the items positions cache
 745     d->elementsPosition.clear();
 746     d->categoriesPosition.clear();
 747     d->forcedSelectionPosition = 0;
 748
 749     if ((viewMode() != KCategorizedView::IconMode) || !d->proxyModel ||
 750         !d->categoryDrawer || !d->proxyModel->isCategorizedModel())
 751     {
 752         return;
 753     }
 754
 755     d->updateScrollbars();
 756 }
 757
 758 void KCategorizedView::setSelection(const QRect &rect,
 759                                     QItemSelectionModel::SelectionFlags flags)
 760 {
 761     if ((viewMode() != KCategorizedView::IconMode) || !d->proxyModel ||
 762         !d->categoryDrawer || !d->proxyModel->isCategorizedModel())
 763     {
 764         QListView::setSelection(rect, flags);
 765         return;
 766     }
 767
 768     if (!flags)
 769         return;
 770
 771     if (flags & QItemSelectionModel::Clear)
 772     {
 773         if (!rect.intersects(d->categoryVisualRect(d->hoveredCategory)))
 774         {
 775             d->lastSelection = QItemSelection();
 776         }
 777     }
 778
 779     selectionModel()->clear();
 780
 781     QModelIndexList dirtyIndexes = d->intersectionSet(rect);
 782
 783     if (!dirtyIndexes.count())
 784     {
 785         if (!d->lastSelection.isEmpty() &&
 786             (rect.intersects(d->categoryVisualRect(d->hoveredCategory)) || d->mouseButtonPressed))
 787         {
 788             selectionModel()->select(d->lastSelection, flags);
 789         }
 790
 791         return;
 792     }
 793
 794     QItemSelection selection;
 795
 796     if (!d->mouseButtonPressed)
 797     {
 798         selection = QItemSelection(dirtyIndexes[0], dirtyIndexes[0]);
 799         d->currentViewIndex = dirtyIndexes[0];
 800     }
 801     else
 802     {
 803         QModelIndex first = dirtyIndexes[0];
 804         QModelIndex last;
 805         foreach (const QModelIndex &index, dirtyIndexes)
 806         {
 807             if (last.isValid() && last.row() + 1 != index.row())
 808             {
 809                 QItemSelectionRange range(first, last);
 810
 811                 selection << range;
 812
 813                 first = index;
 814             }
 815
 816             last = index;
 817         }
 818
 819         if (last.isValid())
 820             selection << QItemSelectionRange(first, last);
 821     }
 822
 823     if (d->lastSelection.count())
 824     {
 825         if ((selection.count() == 1) && (selection[0].indexes().count() == 1))
 826             selection.merge(d->lastSelection, flags);
 827         else
 828             selection.merge(d->lastSelection, QItemSelectionModel::Select);
 829     }
 830
 831     selectionModel()->select(selection, flags);
 832 }
 833
 834 void KCategorizedView::mouseMoveEvent(QMouseEvent *event)
 835 {
 836     QListView::mouseMoveEvent(event);
 837
 838     if ((viewMode() != KCategorizedView::IconMode) || !d->proxyModel ||
 839         !d->categoryDrawer || !d->proxyModel->isCategorizedModel())
 840     {
 841         return;
 842     }
 843
 844     const QString previousHoveredCategory = d->hoveredCategory;
 845
 846     d->mousePosition = event->pos();
 847     d->hoveredCategory = QString();
 848
 849     // Redraw categories
 850     foreach (const QString &category, d->categories)
 851     {
 852         if (d->categoryVisualRect(category).intersects(QRect(event->pos(), event->pos())))
 853         {
 854             d->hoveredCategory = category;
 855             viewport()->update(d->categoryVisualRect(category));
 856         }
 857         else if ((category == previousHoveredCategory) &&
 858                  (!d->categoryVisualRect(previousHoveredCategory).intersects(QRect(event->pos(), event->pos()))))
 859         {
 860             viewport()->update(d->categoryVisualRect(category));
 861         }
 862     }
 863
 864     QRect rect;
 865     if (d->mouseButtonPressed && !d->isDragging)
 866     {
 867         QPoint start, end, initialPressPosition;
 868
 869         initialPressPosition = d->initialPressPosition;
 870
 871         initialPressPosition.setY(initialPressPosition.y() - verticalOffset());
 872         initialPressPosition.setX(initialPressPosition.x() - horizontalOffset());
 873
 874         if (d->initialPressPosition.x() > d->mousePosition.x() ||
 875             d->initialPressPosition.y() > d->mousePosition.y())
 876         {
 877             start = d->mousePosition;
 878             end = initialPressPosition;
 879         }
 880         else
 881         {
 882             start = initialPressPosition;
 883             end = d->mousePosition;
 884         }
 885
 886         rect = QRect(start, end).intersected(viewport()->rect().adjusted(-16, -16, 16, 16));
 887
 888         //viewport()->update(rect.united(d->lastSelectionRect));
 889
 890         d->lastSelectionRect = rect;
 891     }
 892 }
 893
 894 void KCategorizedView::mousePressEvent(QMouseEvent *event)
 895 {
 896     d->dragLeftViewport = false;
 897
 898     if (event->button() == Qt::LeftButton)
 899     {
 900         d->mouseButtonPressed = true;
 901
 902         d->initialPressPosition = event->pos();
 903         d->initialPressPosition.setY(d->initialPressPosition.y() +
 904                                                               verticalOffset());
 905         d->initialPressPosition.setX(d->initialPressPosition.x() +
 906                                                             horizontalOffset());
 907     }
 908
 909     QListView::mousePressEvent(event);
 910
 911     viewport()->update(d->categoryVisualRect(d->hoveredCategory));
 912 }
 913
 914 void KCategorizedView::mouseReleaseEvent(QMouseEvent *event)
 915 {
 916     d->mouseButtonPressed = false;
 917
 918     QListView::mouseReleaseEvent(event);
 919
 920     if ((viewMode() != KCategorizedView::IconMode) || !d->proxyModel ||
 921         !d->categoryDrawer || !d->proxyModel->isCategorizedModel())
 922     {
 923         return;
 924     }
 925
 926     QPoint initialPressPosition = viewport()->mapFromGlobal(QCursor::pos());
 927     initialPressPosition.setY(initialPressPosition.y() + verticalOffset());
 928     initialPressPosition.setX(initialPressPosition.x() + horizontalOffset());
 929
 930     QItemSelection selection;
 931     QItemSelection deselection;
 932
 933     if (initialPressPosition == d->initialPressPosition)
 934     {
 935         foreach(const QString &category, d->categories)
 936         {
 937             if (d->categoryVisualRect(category).contains(event->pos()))
 938             {
 939                 foreach (const QModelIndex &index, d->categoriesIndexes[category])
 940                 {
 941                     QModelIndex selectIndex = index.model()->index(index.row(), 0);
 942
 943                     if (!d->lastSelection.contains(selectIndex))
 944                     {
 945                         selection << QItemSelectionRange(selectIndex);
 946                     }
 947                     else
 948                     {
 949                         deselection << QItemSelectionRange(selectIndex);
 950                     }
 951                 }
 952
 953                 selectionModel()->select(selection, QItemSelectionModel::Select);
 954                 selectionModel()->select(deselection, QItemSelectionModel::Deselect);
 955
 956                 break;
 957             }
 958         }
 959     }
 960
 961     d->lastSelection = selectionModel()->selection();
 962
 963     if (d->hovered.isValid())
 964         viewport()->update(visualRect(d->hovered));
 965     else if (!d->hoveredCategory.isEmpty())
 966         viewport()->update(d->categoryVisualRect(d->hoveredCategory));
 967 }
 968
 969 void KCategorizedView::leaveEvent(QEvent *event)
 970 {
 971     d->hovered = QModelIndex();
 972     d->hoveredCategory = QString();
 973
 974     QListView::leaveEvent(event);
 975 }
 976
 977 void KCategorizedView::startDrag(Qt::DropActions supportedActions)
 978 {
 979     // FIXME: QAbstractItemView does far better here since it sets the
 980     //        pixmap of selected icons to the dragging cursor, but it sets a non
 981     //        ARGB window so it is no transparent. Use QAbstractItemView when
 982     //        this is fixed on Qt.
 983     //QListView::startDrag(supportedActions);
 984     QAbstractItemView::startDrag(supportedActions);
 985
 986     d->isDragging = false;
 987     d->mouseButtonPressed = false;
 988
 989     viewport()->update(d->lastDraggedItemsRect);
 990 }
 991
 992 void KCategorizedView::dragMoveEvent(QDragMoveEvent *event)
 993 {
 994     d->mousePosition = event->pos();
 995
 996     if (d->mouseButtonPressed)
 997     {
 998         d->isDragging = true;
 999     }
1000     else
1001     {
1002         d->isDragging = false;
1003     }
1004
1005     d->dragLeftViewport = false;
1006
1007     if ((viewMode() != KCategorizedView::IconMode) || !d->proxyModel ||
1008         !d->categoryDrawer || !d->proxyModel->isCategorizedModel())
1009     {
1010         QListView::dragMoveEvent(event);
1011         return;
1012     }
1013
1014     d->drawDraggedItems();
1015 }
1016
1017 void KCategorizedView::dragLeaveEvent(QDragLeaveEvent *event)
1018 {
1019     d->dragLeftViewport = true;
1020
1021     QListView::dragLeaveEvent(event);
1022 }
1023
1024 QModelIndex KCategorizedView::moveCursor(CursorAction cursorAction,
1025                                   Qt::KeyboardModifiers modifiers)
1026 {
1027     if ((viewMode() != KCategorizedView::IconMode) ||
1028          !d->proxyModel ||
1029          !d->categoryDrawer ||
1030           d->categories.isEmpty() ||
1031          !d->proxyModel->isCategorizedModel()
1032        )
1033     {
1034         return QListView::moveCursor(cursorAction, modifiers);
1035     }
1036
1037     const QModelIndex current = selectionModel()->currentIndex();
1038
1039     int viewportWidth = viewport()->width() - spacing();
1040     int itemWidth;
1041
1042     if (gridSize().isEmpty())
1043     {
1044         itemWidth = d->biggestItemSize.width();
1045     }
1046     else
1047     {
1048         itemWidth = gridSize().width();
1049     }
1050
1051     int itemWidthPlusSeparation = spacing() + itemWidth;
1052     int elementsPerRow = viewportWidth / itemWidthPlusSeparation;
1053
1054     QString lastCategory = d->categories.first();
1055     QString theCategory = d->categories.first();
1056     QString afterCategory = d->categories.first();
1057
1058     bool hasToBreak = false;
1059     foreach (const QString &category, d->categories)
1060     {
1061         if (hasToBreak)
1062         {
1063             afterCategory = category;
1064
1065             break;
1066         }
1067
1068         if (category == d->elementsInfo[current.row()].category)
1069         {
1070             theCategory = category;
1071
1072             hasToBreak = true;
1073         }
1074
1075         if (!hasToBreak)
1076         {
1077             lastCategory = category;
1078         }
1079     }
1080
1081     switch (cursorAction)
1082     {
1083         case QAbstractItemView::MoveUp: {
1084             if (d->elementsInfo[current.row()].relativeOffsetToCategory >= elementsPerRow)
1085             {
1086                 int indexToMove = current.row();
1087                 indexToMove -= qMin(((d->elementsInfo[current.row()].relativeOffsetToCategory) + d->forcedSelectionPosition), elementsPerRow - d->forcedSelectionPosition + (d->elementsInfo[current.row()].relativeOffsetToCategory % elementsPerRow));
1088
1089                 return d->proxyModel->index(indexToMove, 0);
1090             }
1091             else
1092             {
1093                 int lastCategoryLastRow = (d->categoriesIndexes[lastCategory].count() - 1) % elementsPerRow;
1094                 int indexToMove = current.row() - d->elementsInfo[current.row()].relativeOffsetToCategory;
1095
1096                 if (d->forcedSelectionPosition >= lastCategoryLastRow)
1097                 {
1098                     indexToMove -= 1;
1099                 }
1100                 else
1101                 {
1102                     indexToMove -= qMin((lastCategoryLastRow - d->forcedSelectionPosition + 1), d->forcedSelectionPosition + elementsPerRow + 1);
1103                 }
1104
1105                 return d->proxyModel->index(indexToMove, 0);
1106             }
1107         }
1108
1109         case QAbstractItemView::MoveDown: {
1110             if (d->elementsInfo[current.row()].relativeOffsetToCategory < (d->categoriesIndexes[theCategory].count() - 1 - ((d->categoriesIndexes[theCategory].count() - 1) % elementsPerRow)))
1111             {
1112                 int indexToMove = current.row();
1113                 indexToMove += qMin(elementsPerRow, d->categoriesIndexes[theCategory].count() - 1 - d->elementsInfo[current.row()].relativeOffsetToCategory);
1114
1115                 return d->proxyModel->index(indexToMove, 0);
1116             }
1117             else
1118             {
1119                 int afterCategoryLastRow = qMin(elementsPerRow, d->categoriesIndexes[afterCategory].count());
1120                 int indexToMove = current.row() + (d->categoriesIndexes[theCategory].count() - d->elementsInfo[current.row()].relativeOffsetToCategory);
1121
1122                 if (d->forcedSelectionPosition >= afterCategoryLastRow)
1123                 {
1124                     indexToMove += afterCategoryLastRow - 1;
1125                 }
1126                 else
1127                 {
1128                     indexToMove += qMin(d->forcedSelectionPosition, elementsPerRow);
1129                 }
1130
1131                 return d->proxyModel->index(indexToMove, 0);
1132             }
1133         }
1134
1135         case QAbstractItemView::MoveLeft:
1136             d->forcedSelectionPosition = d->elementsInfo[current.row() - 1].relativeOffsetToCategory % elementsPerRow;
1137
1138             if (d->forcedSelectionPosition < 0)
1139                 d->forcedSelectionPosition = (d->categoriesIndexes[theCategory].count() - 1) % elementsPerRow;
1140
1141             return d->proxyModel->index(current.row() - 1, 0);
1142
1143         case QAbstractItemView::MoveRight:
1144             d->forcedSelectionPosition = d->elementsInfo[current.row() + 1].relativeOffsetToCategory % elementsPerRow;
1145
1146             if (d->forcedSelectionPosition < 0)
1147                 d->forcedSelectionPosition = (d->categoriesIndexes[theCategory].count() - 1) % elementsPerRow;
1148
1149             return d->proxyModel->index(current.row() + 1, 0);
1150
1151         default:
1152             break;
1153     }
1154
1155     return QListView::moveCursor(cursorAction, modifiers);
1156 }
1157
1158 void KCategorizedView::rowsInserted(const QModelIndex &parent,
1159                              int start,
1160                              int end)
1161 {
1162     QListView::rowsInserted(parent, start, end);
1163
1164     if ((viewMode() != KCategorizedView::IconMode) || !d->proxyModel ||
1165         !d->categoryDrawer || !d->proxyModel->isCategorizedModel())
1166     {
1167         d->lastSelection = QItemSelection();
1168         d->currentViewIndex = QModelIndex();
1169         d->forcedSelectionPosition = 0;
1170         d->elementsInfo.clear();
1171         d->elementsPosition.clear();
1172         d->categoriesIndexes.clear();
1173         d->categoriesPosition.clear();
1174         d->categories.clear();
1175         d->intersectedIndexes.clear();
1176         d->modelIndexList.clear();
1177         d->hovered = QModelIndex();
1178         d->biggestItemSize = QSize(0, 0);
1179         d->mouseButtonPressed = false;
1180
1181         return;
1182     }
1183
1184     rowsInsertedArtifficial(parent, start, end);
1185 }
1186
1187 void KCategorizedView::rowsInsertedArtifficial(const QModelIndex &parent,
1188                                         int start,
1189                                         int end)
1190 {
1191     Q_UNUSED(parent);
1192
1193     d->lastSelection = QItemSelection();
1194     d->currentViewIndex = QModelIndex();
1195     d->forcedSelectionPosition = 0;
1196     d->elementsInfo.clear();
1197     d->elementsPosition.clear();
1198     d->categoriesIndexes.clear();
1199     d->categoriesPosition.clear();
1200     d->categories.clear();
1201     d->intersectedIndexes.clear();
1202     d->modelIndexList.clear();
1203     d->hovered = QModelIndex();
1204     d->biggestItemSize = QSize(0, 0);
1205     d->mouseButtonPressed = false;
1206
1207     if (start > end || end < 0 || start < 0 || !d->proxyModel->rowCount())
1208     {
1209         return;
1210     }
1211
1212     // Add all elements mapped to the source model
1213     for (int k = 0; k < d->proxyModel->rowCount(); k++)
1214     {
1215         d->biggestItemSize = QSize(qMax(sizeHintForIndex(d->proxyModel->index(k, 0)).width(),
1216                                         d->biggestItemSize.width()),
1217                                    qMax(sizeHintForIndex(d->proxyModel->index(k, 0)).height(),
1218                                         d->biggestItemSize.height()));
1219
1220         d->modelIndexList << d->proxyModel->index(k, d->proxyModel->sortColumn());
1221     }
1222
1223     // Explore categories
1224     QString prevCategory = d->proxyModel->data(d->modelIndexList[0], KCategorizedSortFilterProxyModel::CategoryRole).toString();
1225     QString lastCategory = prevCategory;
1226     QModelIndexList modelIndexList;
1227     struct Private::ElementInfo elementInfo;
1228     int offset = -1;
1229     foreach (const QModelIndex &index, d->modelIndexList)
1230     {
1231         lastCategory = d->proxyModel->data(index, KCategorizedSortFilterProxyModel::CategoryRole).toString();
1232
1233         elementInfo.category = lastCategory;
1234
1235         if (prevCategory != lastCategory)
1236         {
1237             offset = 0;
1238             d->categoriesIndexes.insert(prevCategory, modelIndexList);
1239             d->categories << prevCategory;
1240             modelIndexList.clear();
1241         }
1242         else
1243         {
1244             offset++;
1245         }
1246
1247         elementInfo.relativeOffsetToCategory = offset;
1248
1249         modelIndexList << index;
1250         prevCategory = lastCategory;
1251
1252         d->elementsInfo.insert(index.row(), elementInfo);
1253     }
1254
1255     d->categoriesIndexes.insert(prevCategory, modelIndexList);
1256     d->categories << prevCategory;
1257
1258     d->updateScrollbars();
1259 }
1260
1261 void KCategorizedView::rowsRemoved(const QModelIndex &parent,
1262                             int start,
1263                             int end)
1264 {
1265     if ((viewMode() == KCategorizedView::IconMode) && d->proxyModel &&
1266         d->categoryDrawer && d->proxyModel->isCategorizedModel())
1267     {
1268         // Force the view to update all elements
1269         rowsInsertedArtifficial(parent, start, end);
1270     }
1271 }
1272
1273 void KCategorizedView::updateGeometries()
1274 {
1275     if ((viewMode() != KCategorizedView::IconMode) || !d->proxyModel ||
1276         !d->categoryDrawer || !d->proxyModel->isCategorizedModel())
1277     {
1278         QListView::updateGeometries();
1279         return;
1280     }
1281
1282     // Avoid QListView::updateGeometries(), since it will try to set another
1283     // range to our scroll bars, what we don't want (ereslibre)
1284     QAbstractItemView::updateGeometries();
1285 }
1286
1287 void KCategorizedView::slotLayoutChanged()
1288 {
1289     if ((viewMode() == KCategorizedView::IconMode) && d->proxyModel &&
1290         d->categoryDrawer && d->proxyModel->isCategorizedModel())
1291     {
1292         // Force the view to update all elements
1293         rowsInsertedArtifficial(QModelIndex(), 0, d->proxyModel->rowCount() - 1);
1294     }
1295 }
1296
1297 #include "kcategorizedview.moc"