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 <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     selectionModel()->clear();
 772
 773     if (flags & QItemSelectionModel::Clear)
 774     {
 775         d->lastSelection = QItemSelection();
 776     }
 777
 778     QModelIndexList dirtyIndexes = d->intersectionSet(rect);
 779
 780     QItemSelection selection;
 781
 782     if (!dirtyIndexes.count())
 783     {
 784         if (d->lastSelection.count())
 785         {
 786             selectionModel()->select(d->lastSelection, flags);
 787         }
 788
 789         return;
 790     }
 791
 792     if (!d->mouseButtonPressed)
 793     {
 794         selection = QItemSelection(dirtyIndexes[0], dirtyIndexes[0]);
 795         d->currentViewIndex = dirtyIndexes[0];
 796     }
 797     else
 798     {
 799         QModelIndex first = dirtyIndexes[0];
 800         QModelIndex last;
 801         foreach (const QModelIndex &index, dirtyIndexes)
 802         {
 803             if (last.isValid() && last.row() + 1 != index.row())
 804             {
 805                 QItemSelectionRange range(first, last);
 806
 807                 selection << range;
 808
 809                 first = index;
 810             }
 811
 812             last = index;
 813         }
 814
 815         if (last.isValid())
 816             selection << QItemSelectionRange(first, last);
 817     }
 818
 819     if (d->lastSelection.count())
 820     {
 821         if ((selection.count() == 1) && (selection[0].indexes().count() == 1))
 822             selection.merge(d->lastSelection, flags);
 823         else
 824             selection.merge(d->lastSelection, QItemSelectionModel::Select);
 825     }
 826
 827     selectionModel()->select(selection, flags);
 828 }
 829
 830 void KCategorizedView::mouseMoveEvent(QMouseEvent *event)
 831 {
 832     QListView::mouseMoveEvent(event);
 833
 834     if ((viewMode() != KCategorizedView::IconMode) || !d->proxyModel ||
 835         !d->categoryDrawer || !d->proxyModel->isCategorizedModel())
 836     {
 837         return;
 838     }
 839
 840     const QString previousHoveredCategory = d->hoveredCategory;
 841
 842     d->mousePosition = event->pos();
 843     d->hoveredCategory = QString();
 844
 845     // Redraw categories
 846     foreach (const QString &category, d->categories)
 847     {
 848         if (d->categoryVisualRect(category).intersects(QRect(event->pos(), event->pos())))
 849         {
 850             d->hoveredCategory = category;
 851             viewport()->update(d->categoryVisualRect(category));
 852         }
 853         else if ((category == previousHoveredCategory) &&
 854                  (!d->categoryVisualRect(previousHoveredCategory).intersects(QRect(event->pos(), event->pos()))))
 855         {
 856             viewport()->update(d->categoryVisualRect(category));
 857         }
 858     }
 859
 860     QRect rect;
 861     if (d->mouseButtonPressed && !d->isDragging)
 862     {
 863         QPoint start, end, initialPressPosition;
 864
 865         initialPressPosition = d->initialPressPosition;
 866
 867         initialPressPosition.setY(initialPressPosition.y() - verticalOffset());
 868         initialPressPosition.setX(initialPressPosition.x() - horizontalOffset());
 869
 870         if (d->initialPressPosition.x() > d->mousePosition.x() ||
 871             d->initialPressPosition.y() > d->mousePosition.y())
 872         {
 873             start = d->mousePosition;
 874             end = initialPressPosition;
 875         }
 876         else
 877         {
 878             start = initialPressPosition;
 879             end = d->mousePosition;
 880         }
 881
 882         rect = QRect(start, end).intersected(viewport()->rect().adjusted(-16, -16, 16, 16));
 883
 884         //viewport()->update(rect.united(d->lastSelectionRect));
 885
 886         d->lastSelectionRect = rect;
 887     }
 888 }
 889
 890 void KCategorizedView::mousePressEvent(QMouseEvent *event)
 891 {
 892     d->dragLeftViewport = false;
 893
 894     if (event->button() == Qt::LeftButton)
 895     {
 896         d->mouseButtonPressed = true;
 897
 898         d->initialPressPosition = event->pos();
 899         d->initialPressPosition.setY(d->initialPressPosition.y() +
 900                                                               verticalOffset());
 901         d->initialPressPosition.setX(d->initialPressPosition.x() +
 902                                                             horizontalOffset());
 903     }
 904
 905     QListView::mousePressEvent(event);
 906
 907     viewport()->update(d->categoryVisualRect(d->hoveredCategory));
 908 }
 909
 910 void KCategorizedView::mouseReleaseEvent(QMouseEvent *event)
 911 {
 912     d->mouseButtonPressed = false;
 913
 914     QListView::mouseReleaseEvent(event);
 915
 916     if ((viewMode() != KCategorizedView::IconMode) || !d->proxyModel ||
 917         !d->categoryDrawer || !d->proxyModel->isCategorizedModel())
 918     {
 919         return;
 920     }
 921
 922     QPoint initialPressPosition = viewport()->mapFromGlobal(QCursor::pos());
 923     initialPressPosition.setY(initialPressPosition.y() + verticalOffset());
 924     initialPressPosition.setX(initialPressPosition.x() + horizontalOffset());
 925
 926     QItemSelection selection;
 927
 928     if (initialPressPosition == d->initialPressPosition)
 929     {
 930         foreach(const QString &category, d->categories)
 931         {
 932             if (d->categoryVisualRect(category).contains(event->pos()))
 933             {
 934                 foreach (const QModelIndex &index, d->categoriesIndexes[category])
 935                 {
 936                     QModelIndex selectIndex = index.model()->index(index.row(), 0);
 937
 938                     selection << QItemSelectionRange(selectIndex);
 939                 }
 940
 941                 selectionModel()->select(selection, QItemSelectionModel::Select);
 942
 943                 break;
 944             }
 945         }
 946     }
 947
 948     d->lastSelection = selectionModel()->selection();
 949
 950     if (d->hovered.isValid())
 951         viewport()->update(visualRect(d->hovered));
 952     else if (!d->hoveredCategory.isEmpty())
 953         viewport()->update(d->categoryVisualRect(d->hoveredCategory));
 954 }
 955
 956 void KCategorizedView::leaveEvent(QEvent *event)
 957 {
 958     d->hovered = QModelIndex();
 959     d->hoveredCategory = QString();
 960
 961     QListView::leaveEvent(event);
 962 }
 963
 964 void KCategorizedView::startDrag(Qt::DropActions supportedActions)
 965 {
 966     QListView::startDrag(supportedActions);
 967
 968     d->isDragging = false;
 969     d->mouseButtonPressed = false;
 970
 971     viewport()->update(d->lastDraggedItemsRect);
 972 }
 973
 974 void KCategorizedView::dragMoveEvent(QDragMoveEvent *event)
 975 {
 976     d->mousePosition = event->pos();
 977
 978     if (d->mouseButtonPressed)
 979     {
 980         d->isDragging = true;
 981     }
 982     else
 983     {
 984         d->isDragging = false;
 985     }
 986
 987     d->dragLeftViewport = false;
 988
 989     if ((viewMode() != KCategorizedView::IconMode) || !d->proxyModel ||
 990         !d->categoryDrawer || !d->proxyModel->isCategorizedModel())
 991     {
 992         QListView::dragMoveEvent(event);
 993         return;
 994     }
 995
 996     d->drawDraggedItems();
 997 }
 998
 999 void KCategorizedView::dragLeaveEvent(QDragLeaveEvent *event)
1000 {
1001     d->dragLeftViewport = true;
1002
1003     QListView::dragLeaveEvent(event);
1004 }
1005
1006 QModelIndex KCategorizedView::moveCursor(CursorAction cursorAction,
1007                                   Qt::KeyboardModifiers modifiers)
1008 {
1009     if ((viewMode() != KCategorizedView::IconMode) ||
1010          !d->proxyModel ||
1011          !d->categoryDrawer ||
1012           d->categories.isEmpty() ||
1013          !d->proxyModel->isCategorizedModel()
1014        )
1015     {
1016         return QListView::moveCursor(cursorAction, modifiers);
1017     }
1018
1019     const QModelIndex current = selectionModel()->currentIndex();
1020
1021     int viewportWidth = viewport()->width() - spacing();
1022     int itemWidth;
1023
1024     if (gridSize().isEmpty())
1025     {
1026         itemWidth = d->biggestItemSize.width();
1027     }
1028     else
1029     {
1030         itemWidth = gridSize().width();
1031     }
1032
1033     int itemWidthPlusSeparation = spacing() + itemWidth;
1034     int elementsPerRow = viewportWidth / itemWidthPlusSeparation;
1035
1036     QString lastCategory = d->categories.first();
1037     QString theCategory = d->categories.first();
1038     QString afterCategory = d->categories.first();
1039
1040     bool hasToBreak = false;
1041     foreach (const QString &category, d->categories)
1042     {
1043         if (hasToBreak)
1044         {
1045             afterCategory = category;
1046
1047             break;
1048         }
1049
1050         if (category == d->elementsInfo[d->proxyModel->mapToSource(current).row()].category)
1051         {
1052             theCategory = category;
1053
1054             hasToBreak = true;
1055         }
1056
1057         if (!hasToBreak)
1058         {
1059             lastCategory = category;
1060         }
1061     }
1062 // ### FIXME !!!
1063 #if 0
1064     switch (cursorAction)
1065     {
1066         case QAbstractItemView::MoveUp: {
1067             if (d->elementsInfo[d->proxyModel->mapToSource(current).row()].relativeOffsetToCategory >= elementsPerRow)
1068             {
1069                 int indexToMove = d->invertedElementDictionary[current.row()].row();
1070                 indexToMove -= qMin(((d->elementsInfo[d->proxyModel->mapToSource(current).row()].relativeOffsetToCategory) + d->forcedSelectionPosition), elementsPerRow - d->forcedSelectionPosition + (d->elementsInfo[d->proxyModel->mapToSource(current).row()].relativeOffsetToCategory % elementsPerRow));
1071
1072                 return d->elementDictionary[indexToMove];
1073             }
1074             else
1075             {
1076                 int lastCategoryLastRow = (d->categoriesIndexes[lastCategory].count() - 1) % elementsPerRow;
1077                 int indexToMove = d->invertedElementDictionary[current.row()].row() - d->elementsInfo[d->proxyModel->mapToSource(current).row()].relativeOffsetToCategory;
1078
1079                 if (d->forcedSelectionPosition >= lastCategoryLastRow)
1080                 {
1081                     indexToMove -= 1;
1082                 }
1083                 else
1084                 {
1085                     indexToMove -= qMin((lastCategoryLastRow - d->forcedSelectionPosition + 1), d->forcedSelectionPosition + elementsPerRow + 1);
1086                 }
1087
1088                 return d->elementDictionary[indexToMove];
1089             }
1090         }
1091
1092         case QAbstractItemView::MoveDown: {
1093             if (d->elementsInfo[d->proxyModel->mapToSource(current).row()].relativeOffsetToCategory < (d->categoriesIndexes[theCategory].count() - 1 - ((d->categoriesIndexes[theCategory].count() - 1) % elementsPerRow)))
1094             {
1095                 int indexToMove = d->invertedElementDictionary[current.row()].row();
1096                 indexToMove += qMin(elementsPerRow, d->categoriesIndexes[theCategory].count() - 1 - d->elementsInfo[d->proxyModel->mapToSource(current).row()].relativeOffsetToCategory);
1097
1098                 return d->elementDictionary[indexToMove];
1099             }
1100             else
1101             {
1102                 int afterCategoryLastRow = qMin(elementsPerRow, d->categoriesIndexes[afterCategory].count());
1103                 int indexToMove = d->invertedElementDictionary[current.row()].row() + (d->categoriesIndexes[theCategory].count() - d->elementsInfo[d->proxyModel->mapToSource(current).row()].relativeOffsetToCategory);
1104
1105                 if (d->forcedSelectionPosition >= afterCategoryLastRow)
1106                 {
1107                     indexToMove += afterCategoryLastRow - 1;
1108                 }
1109                 else
1110                 {
1111                     indexToMove += qMin(d->forcedSelectionPosition, elementsPerRow);
1112                 }
1113
1114                 return d->elementDictionary[indexToMove];
1115             }
1116         }
1117
1118         case QAbstractItemView::MoveLeft:
1119             d->forcedSelectionPosition = d->elementsInfo[d->proxyModel->mapToSource(d->elementDictionary[d->proxyModel->index(d->invertedElementDictionary[current.row()].row() - 1, 0).row()]).row()].relativeOffsetToCategory % elementsPerRow;
1120
1121             if (d->forcedSelectionPosition < 0)
1122                 d->forcedSelectionPosition = (d->categoriesIndexes[theCategory].count() - 1) % elementsPerRow;
1123
1124             return d->elementDictionary[d->proxyModel->index(d->invertedElementDictionary[current.row()].row() - 1, 0).row()];
1125
1126         case QAbstractItemView::MoveRight:
1127             d->forcedSelectionPosition = d->elementsInfo[d->proxyModel->mapToSource(d->elementDictionary[d->proxyModel->index(d->invertedElementDictionary[current.row()].row() + 1, 0).row()]).row()].relativeOffsetToCategory % elementsPerRow;
1128
1129             if (d->forcedSelectionPosition < 0)
1130                 d->forcedSelectionPosition = (d->categoriesIndexes[theCategory].count() - 1) % elementsPerRow;
1131
1132             return d->elementDictionary[d->proxyModel->index(d->invertedElementDictionary[current.row()].row() + 1, 0).row()];
1133
1134         default:
1135             break;
1136     }
1137 #endif
1138     return QListView::moveCursor(cursorAction, modifiers);
1139 }
1140
1141 void KCategorizedView::rowsInserted(const QModelIndex &parent,
1142                              int start,
1143                              int end)
1144 {
1145     QListView::rowsInserted(parent, start, end);
1146
1147     if ((viewMode() != KCategorizedView::IconMode) || !d->proxyModel ||
1148         !d->categoryDrawer || !d->proxyModel->isCategorizedModel())
1149     {
1150         d->lastSelection = QItemSelection();
1151         d->currentViewIndex = QModelIndex();
1152         d->forcedSelectionPosition = 0;
1153         d->elementsInfo.clear();
1154         d->elementsPosition.clear();
1155         d->categoriesIndexes.clear();
1156         d->categoriesPosition.clear();
1157         d->categories.clear();
1158         d->intersectedIndexes.clear();
1159         d->modelIndexList.clear();
1160         d->hovered = QModelIndex();
1161         d->biggestItemSize = QSize(0, 0);
1162         d->mouseButtonPressed = false;
1163
1164         return;
1165     }
1166
1167     rowsInsertedArtifficial(parent, start, end);
1168 }
1169
1170 void KCategorizedView::rowsInsertedArtifficial(const QModelIndex &parent,
1171                                         int start,
1172                                         int end)
1173 {
1174     Q_UNUSED(parent);
1175
1176     d->lastSelection = QItemSelection();
1177     d->currentViewIndex = QModelIndex();
1178     d->forcedSelectionPosition = 0;
1179     d->elementsInfo.clear();
1180     d->elementsPosition.clear();
1181     d->categoriesIndexes.clear();
1182     d->categoriesPosition.clear();
1183     d->categories.clear();
1184     d->intersectedIndexes.clear();
1185     d->modelIndexList.clear();
1186     d->hovered = QModelIndex();
1187     d->biggestItemSize = QSize(0, 0);
1188     d->mouseButtonPressed = false;
1189
1190     if (start > end || end < 0 || start < 0 || !d->proxyModel->rowCount())
1191     {
1192         return;
1193     }
1194
1195     // Add all elements mapped to the source model
1196     for (int k = 0; k < d->proxyModel->rowCount(); k++)
1197     {
1198         d->biggestItemSize = QSize(qMax(sizeHintForIndex(d->proxyModel->index(k, 0)).width(),
1199                                         d->biggestItemSize.width()),
1200                                    qMax(sizeHintForIndex(d->proxyModel->index(k, 0)).height(),
1201                                         d->biggestItemSize.height()));
1202
1203         d->modelIndexList << d->proxyModel->index(k, d->proxyModel->sortColumn());
1204     }
1205
1206     // Explore categories
1207     QString prevCategory = d->proxyModel->data(d->modelIndexList[0], KCategorizedSortFilterProxyModel::CategoryRole).toString();
1208     QString lastCategory = prevCategory;
1209     QModelIndexList modelIndexList;
1210     struct Private::ElementInfo elementInfo;
1211     int offset = -1;
1212     foreach (const QModelIndex &index, d->modelIndexList)
1213     {
1214         lastCategory = d->proxyModel->data(index, KCategorizedSortFilterProxyModel::CategoryRole).toString();
1215
1216         elementInfo.category = lastCategory;
1217
1218         if (prevCategory != lastCategory)
1219         {
1220             offset = 0;
1221             d->categoriesIndexes.insert(prevCategory, modelIndexList);
1222             d->categories << prevCategory;
1223             modelIndexList.clear();
1224         }
1225         else
1226         {
1227             offset++;
1228         }
1229
1230         elementInfo.relativeOffsetToCategory = offset;
1231
1232         modelIndexList << index;
1233         prevCategory = lastCategory;
1234
1235         d->elementsInfo.insert(index.row(), elementInfo);
1236     }
1237
1238     d->categoriesIndexes.insert(prevCategory, modelIndexList);
1239     d->categories << prevCategory;
1240
1241     d->updateScrollbars();
1242 }
1243
1244 void KCategorizedView::rowsRemoved(const QModelIndex &parent,
1245                             int start,
1246                             int end)
1247 {
1248     if ((viewMode() == KCategorizedView::IconMode) && d->proxyModel &&
1249         d->categoryDrawer && d->proxyModel->isCategorizedModel())
1250     {
1251         // Force the view to update all elements
1252         rowsInsertedArtifficial(parent, start, end);
1253     }
1254 }
1255
1256 void KCategorizedView::updateGeometries()
1257 {
1258     if ((viewMode() != KCategorizedView::IconMode) || !d->proxyModel ||
1259         !d->categoryDrawer || !d->proxyModel->isCategorizedModel())
1260     {
1261         QListView::updateGeometries();
1262         return;
1263     }
1264
1265     // Avoid QListView::updateGeometries(), since it will try to set another
1266     // range to our scroll bars, what we don't want (ereslibre)
1267     QAbstractItemView::updateGeometries();
1268 }
1269
1270 void KCategorizedView::slotLayoutChanged()
1271 {
1272     if ((viewMode() == KCategorizedView::IconMode) && d->proxyModel &&
1273         d->categoryDrawer && d->proxyModel->isCategorizedModel())
1274     {
1275         // Force the view to update all elements
1276         rowsInsertedArtifficial(QModelIndex(), 0, d->proxyModel->rowCount() - 1);
1277     }
1278 }
1279
1280 #include "kcategorizedview.moc"