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         QObject::disconnect(d->proxyModel,
 488                             SIGNAL(rowsRemoved(QModelIndex,int,int)),
 489                             this, SLOT(rowsRemoved(QModelIndex,int,int)));
 490     }
 491
 492     QListView::setModel(model);
 493
 494     d->proxyModel = dynamic_cast<KCategorizedSortFilterProxyModel*>(model);
 495
 496     if (d->proxyModel)
 497     {
 498         d->modelSortRole = d->proxyModel->sortRole();
 499         d->modelSortColumn = d->proxyModel->sortColumn();
 500         d->modelCategorized = true;
 501         d->modelSortOrder = d->proxyModel->sortOrder();
 502
 503         QObject::connect(d->proxyModel,
 504                          SIGNAL(layoutChanged()),
 505                          this, SLOT(slotLayoutChanged()));
 506
 507         QObject::connect(d->proxyModel,
 508                          SIGNAL(dataChanged(QModelIndex,QModelIndex)),
 509                          this, SLOT(slotLayoutChanged()));
 510
 511         QObject::connect(d->proxyModel,
 512                          SIGNAL(rowsRemoved(QModelIndex,int,int)),
 513                          this, SLOT(rowsRemoved(QModelIndex,int,int)));
 514
 515         if (d->proxyModel->rowCount())
 516         {
 517             rowsInsertedArtifficial(QModelIndex(), 0, d->proxyModel->rowCount() - 1);
 518         }
 519     }
 520     else
 521     {
 522         d->modelCategorized = false;
 523     }
 524 }
 525
 526 QRect KCategorizedView::visualRect(const QModelIndex &index) const
 527 {
 528     if ((viewMode() != KCategorizedView::IconMode) || !d->proxyModel ||
 529         !d->categoryDrawer || !d->proxyModel->isCategorizedModel())
 530     {
 531         return QListView::visualRect(index);
 532     }
 533
 534     if (!qobject_cast<const QSortFilterProxyModel*>(index.model()))
 535     {
 536         return d->visualRect(d->proxyModel->mapFromSource(index));
 537     }
 538
 539     return d->visualRect(index);
 540 }
 541
 542 KCategoryDrawer *KCategorizedView::categoryDrawer() const
 543 {
 544     return d->categoryDrawer;
 545 }
 546
 547 void KCategorizedView::setCategoryDrawer(KCategoryDrawer *categoryDrawer)
 548 {
 549     d->lastSelection = QItemSelection();
 550     d->currentViewIndex = QModelIndex();
 551     d->forcedSelectionPosition = 0;
 552     d->elementsInfo.clear();
 553     d->elementsPosition.clear();
 554     d->categoriesIndexes.clear();
 555     d->categoriesPosition.clear();
 556     d->categories.clear();
 557     d->intersectedIndexes.clear();
 558     d->modelIndexList.clear();
 559     d->hovered = QModelIndex();
 560     d->mouseButtonPressed = false;
 561
 562     if (!categoryDrawer && d->proxyModel)
 563     {
 564         QObject::disconnect(d->proxyModel,
 565                             SIGNAL(layoutChanged()),
 566                             this, SLOT(slotLayoutChanged()));
 567
 568         QObject::disconnect(d->proxyModel,
 569                             SIGNAL(dataChanged(QModelIndex,QModelIndex)),
 570                             this, SLOT(slotLayoutChanged()));
 571
 572         QObject::disconnect(d->proxyModel,
 573                             SIGNAL(rowsRemoved(QModelIndex,int,int)),
 574                             this, SLOT(rowsRemoved(QModelIndex,int,int)));
 575     }
 576     else if (categoryDrawer && d->proxyModel)
 577     {
 578         QObject::connect(d->proxyModel,
 579                          SIGNAL(layoutChanged()),
 580                          this, SLOT(slotLayoutChanged()));
 581
 582         QObject::connect(d->proxyModel,
 583                          SIGNAL(dataChanged(QModelIndex,QModelIndex)),
 584                          this, SLOT(slotLayoutChanged()));
 585
 586         QObject::connect(d->proxyModel,
 587                          SIGNAL(rowsRemoved(QModelIndex,int,int)),
 588                          this, SLOT(rowsRemoved(QModelIndex,int,int)));
 589     }
 590
 591     d->categoryDrawer = categoryDrawer;
 592
 593     if (categoryDrawer)
 594     {
 595         if (d->proxyModel)
 596         {
 597             rowsInsertedArtifficial(QModelIndex(), 0, d->proxyModel->rowCount() - 1);
 598         }
 599     }
 600     else
 601     {
 602         updateGeometries();
 603     }
 604 }
 605
 606 QModelIndex KCategorizedView::indexAt(const QPoint &point) const
 607 {
 608     if ((viewMode() != KCategorizedView::IconMode) || !d->proxyModel ||
 609         !d->categoryDrawer || !d->proxyModel->isCategorizedModel())
 610     {
 611         return QListView::indexAt(point);
 612     }
 613
 614     QModelIndex index;
 615
 616     QModelIndexList item = d->intersectionSet(QRect(point, point));
 617
 618     if (item.count() == 1)
 619     {
 620         index = item[0];
 621     }
 622
 623     d->hovered = index;
 624
 625     return index;
 626 }
 627
 628 void KCategorizedView::reset()
 629 {
 630     QListView::reset();
 631
 632     d->lastSelection = QItemSelection();
 633     d->currentViewIndex = QModelIndex();
 634     d->forcedSelectionPosition = 0;
 635     d->elementsInfo.clear();
 636     d->elementsPosition.clear();
 637     d->categoriesIndexes.clear();
 638     d->categoriesPosition.clear();
 639     d->categories.clear();
 640     d->intersectedIndexes.clear();
 641     d->modelIndexList.clear();
 642     d->hovered = QModelIndex();
 643     d->biggestItemSize = QSize(0, 0);
 644     d->mouseButtonPressed = false;
 645 }
 646
 647 void KCategorizedView::paintEvent(QPaintEvent *event)
 648 {
 649     if ((viewMode() != KCategorizedView::IconMode) || !d->proxyModel ||
 650         !d->categoryDrawer || !d->proxyModel->isCategorizedModel())
 651     {
 652         QListView::paintEvent(event);
 653         return;
 654     }
 655
 656     QStyleOptionViewItemV3 option = viewOptions();
 657     option.widget = this;
 658     if (wordWrap())
 659     {
 660         option.features |= QStyleOptionViewItemV2::WrapText;
 661     }
 662
 663     QPainter painter(viewport());
 664     QRect area = event->rect();
 665     const bool focus = (hasFocus() || viewport()->hasFocus()) &&
 666                         currentIndex().isValid();
 667     const QStyle::State state = option.state;
 668     const bool enabled = (state & QStyle::State_Enabled) != 0;
 669
 670     painter.save();
 671
 672     QModelIndexList dirtyIndexes = d->intersectionSet(area);
 673     foreach (const QModelIndex &index, dirtyIndexes)
 674     {
 675         option.state = state;
 676         option.rect = visualRect(index);
 677
 678         if (selectionModel() && selectionModel()->isSelected(index))
 679         {
 680             option.state |= QStyle::State_Selected;
 681         }
 682
 683         if (enabled)
 684         {
 685             QPalette::ColorGroup cg;
 686             if ((d->proxyModel->flags(index) & Qt::ItemIsEnabled) == 0)
 687             {
 688                 option.state &= ~QStyle::State_Enabled;
 689                 cg = QPalette::Disabled;
 690             }
 691             else
 692             {
 693                 cg = QPalette::Normal;
 694             }
 695             option.palette.setCurrentColorGroup(cg);
 696         }
 697
 698         if (focus && currentIndex() == index)
 699         {
 700             option.state |= QStyle::State_HasFocus;
 701             if (this->state() == EditingState)
 702                 option.state |= QStyle::State_Editing;
 703         }
 704
 705         if ((index == d->hovered) && !d->mouseButtonPressed)
 706             option.state |= QStyle::State_MouseOver;
 707         else
 708             option.state &= ~QStyle::State_MouseOver;
 709
 710         itemDelegate(index)->paint(&painter, option, index);
 711     }
 712
 713     // Redraw categories
 714     QStyleOptionViewItem otherOption;
 715     foreach (const QString &category, d->categories)
 716     {
 717         otherOption = option;
 718         otherOption.rect = d->categoryVisualRect(category);
 719         otherOption.state &= ~QStyle::State_MouseOver;
 720
 721         if (otherOption.rect.intersects(area))
 722         {
 723             QModelIndex indexToDraw = d->proxyModel->index(d->categoriesIndexes[category][0].row(), d->proxyModel->sortColumn());
 724
 725             d->drawNewCategory(indexToDraw,
 726                                d->proxyModel->sortRole(), otherOption, &painter);
 727         }
 728     }
 729
 730     if (d->mouseButtonPressed && !d->isDragging)
 731     {
 732         QPoint start, end, initialPressPosition;
 733
 734         initialPressPosition = d->initialPressPosition;
 735
 736         initialPressPosition.setY(initialPressPosition.y() - verticalOffset());
 737         initialPressPosition.setX(initialPressPosition.x() - horizontalOffset());
 738
 739         if (d->initialPressPosition.x() > d->mousePosition.x() ||
 740             d->initialPressPosition.y() > d->mousePosition.y())
 741         {
 742             start = d->mousePosition;
 743             end = initialPressPosition;
 744         }
 745         else
 746         {
 747             start = initialPressPosition;
 748             end = d->mousePosition;
 749         }
 750
 751         QStyleOptionRubberBand yetAnotherOption;
 752         yetAnotherOption.initFrom(this);
 753         yetAnotherOption.shape = QRubberBand::Rectangle;
 754         yetAnotherOption.opaque = false;
 755         yetAnotherOption.rect = QRect(start, end).intersected(viewport()->rect().adjusted(-16, -16, 16, 16));
 756         painter.save();
 757         style()->drawControl(QStyle::CE_RubberBand, &yetAnotherOption, &painter);
 758         painter.restore();
 759     }
 760
 761     if (d->isDragging && !d->dragLeftViewport)
 762     {
 763         painter.setOpacity(0.5);
 764         d->drawDraggedItems(&painter);
 765     }
 766
 767     painter.restore();
 768 }
 769
 770 void KCategorizedView::resizeEvent(QResizeEvent *event)
 771 {
 772     QListView::resizeEvent(event);
 773
 774     // Clear the items positions cache
 775     d->elementsPosition.clear();
 776     d->categoriesPosition.clear();
 777     d->forcedSelectionPosition = 0;
 778
 779     if ((viewMode() != KCategorizedView::IconMode) || !d->proxyModel ||
 780         !d->categoryDrawer || !d->proxyModel->isCategorizedModel())
 781     {
 782         return;
 783     }
 784
 785     d->updateScrollbars();
 786 }
 787
 788 void KCategorizedView::setSelection(const QRect &rect,
 789                                     QItemSelectionModel::SelectionFlags flags)
 790 {
 791     if ((viewMode() != KCategorizedView::IconMode) || !d->proxyModel ||
 792         !d->categoryDrawer || !d->proxyModel->isCategorizedModel())
 793     {
 794         QListView::setSelection(rect, flags);
 795         return;
 796     }
 797
 798     if (!flags)
 799         return;
 800
 801     if (flags & QItemSelectionModel::Clear)
 802     {
 803         if (!rect.intersects(d->categoryVisualRect(d->hoveredCategory)))
 804         {
 805             d->lastSelection = QItemSelection();
 806         }
 807     }
 808
 809     selectionModel()->clear();
 810
 811     QModelIndexList dirtyIndexes = d->intersectionSet(rect);
 812
 813     if (!dirtyIndexes.count())
 814     {
 815         if (!d->lastSelection.isEmpty() &&
 816             (rect.intersects(d->categoryVisualRect(d->hoveredCategory)) || d->mouseButtonPressed))
 817         {
 818             selectionModel()->select(d->lastSelection, flags);
 819         }
 820
 821         return;
 822     }
 823
 824     QItemSelection selection;
 825
 826     if (!d->mouseButtonPressed)
 827     {
 828         selection = QItemSelection(dirtyIndexes[0], dirtyIndexes[0]);
 829         d->currentViewIndex = dirtyIndexes[0];
 830     }
 831     else
 832     {
 833         QModelIndex first = dirtyIndexes[0];
 834         QModelIndex last;
 835         foreach (const QModelIndex &index, dirtyIndexes)
 836         {
 837             if (last.isValid() && last.row() + 1 != index.row())
 838             {
 839                 QItemSelectionRange range(first, last);
 840
 841                 selection << range;
 842
 843                 first = index;
 844             }
 845
 846             last = index;
 847         }
 848
 849         if (last.isValid())
 850             selection << QItemSelectionRange(first, last);
 851     }
 852
 853     if (d->lastSelection.count())
 854     {
 855         if ((selection.count() == 1) && (selection[0].indexes().count() == 1))
 856             selection.merge(d->lastSelection, flags);
 857         else
 858             selection.merge(d->lastSelection, QItemSelectionModel::Select);
 859     }
 860
 861     selectionModel()->select(selection, flags);
 862 }
 863
 864 void KCategorizedView::mouseMoveEvent(QMouseEvent *event)
 865 {
 866     QListView::mouseMoveEvent(event);
 867
 868     if ((viewMode() != KCategorizedView::IconMode) || !d->proxyModel ||
 869         !d->categoryDrawer || !d->proxyModel->isCategorizedModel())
 870     {
 871         return;
 872     }
 873
 874     const QString previousHoveredCategory = d->hoveredCategory;
 875
 876     d->mousePosition = event->pos();
 877     d->hoveredCategory = QString();
 878
 879     // Redraw categories
 880     foreach (const QString &category, d->categories)
 881     {
 882         if (d->categoryVisualRect(category).intersects(QRect(event->pos(), event->pos())))
 883         {
 884             d->hoveredCategory = category;
 885             viewport()->update(d->categoryVisualRect(category));
 886         }
 887         else if ((category == previousHoveredCategory) &&
 888                  (!d->categoryVisualRect(previousHoveredCategory).intersects(QRect(event->pos(), event->pos()))))
 889         {
 890             viewport()->update(d->categoryVisualRect(category));
 891         }
 892     }
 893
 894     QRect rect;
 895     if (d->mouseButtonPressed && !d->isDragging)
 896     {
 897         QPoint start, end, initialPressPosition;
 898
 899         initialPressPosition = d->initialPressPosition;
 900
 901         initialPressPosition.setY(initialPressPosition.y() - verticalOffset());
 902         initialPressPosition.setX(initialPressPosition.x() - horizontalOffset());
 903
 904         if (d->initialPressPosition.x() > d->mousePosition.x() ||
 905             d->initialPressPosition.y() > d->mousePosition.y())
 906         {
 907             start = d->mousePosition;
 908             end = initialPressPosition;
 909         }
 910         else
 911         {
 912             start = initialPressPosition;
 913             end = d->mousePosition;
 914         }
 915
 916         rect = QRect(start, end).intersected(viewport()->rect().adjusted(-16, -16, 16, 16));
 917
 918         //viewport()->update(rect.united(d->lastSelectionRect));
 919
 920         d->lastSelectionRect = rect;
 921     }
 922 }
 923
 924 void KCategorizedView::mousePressEvent(QMouseEvent *event)
 925 {
 926     d->dragLeftViewport = false;
 927
 928     if (event->button() == Qt::LeftButton)
 929     {
 930         d->mouseButtonPressed = true;
 931
 932         d->initialPressPosition = event->pos();
 933         d->initialPressPosition.setY(d->initialPressPosition.y() +
 934                                                               verticalOffset());
 935         d->initialPressPosition.setX(d->initialPressPosition.x() +
 936                                                             horizontalOffset());
 937     }
 938
 939     QListView::mousePressEvent(event);
 940
 941     viewport()->update(d->categoryVisualRect(d->hoveredCategory));
 942 }
 943
 944 void KCategorizedView::mouseReleaseEvent(QMouseEvent *event)
 945 {
 946     d->mouseButtonPressed = false;
 947
 948     QListView::mouseReleaseEvent(event);
 949
 950     if ((viewMode() != KCategorizedView::IconMode) || !d->proxyModel ||
 951         !d->categoryDrawer || !d->proxyModel->isCategorizedModel())
 952     {
 953         return;
 954     }
 955
 956     QPoint initialPressPosition = viewport()->mapFromGlobal(QCursor::pos());
 957     initialPressPosition.setY(initialPressPosition.y() + verticalOffset());
 958     initialPressPosition.setX(initialPressPosition.x() + horizontalOffset());
 959
 960     QItemSelection selection;
 961     QItemSelection deselection;
 962
 963     if (initialPressPosition == d->initialPressPosition)
 964     {
 965         foreach(const QString &category, d->categories)
 966         {
 967             if (d->categoryVisualRect(category).contains(event->pos()))
 968             {
 969                 foreach (const QModelIndex &index, d->categoriesIndexes[category])
 970                 {
 971                     QModelIndex selectIndex = index.model()->index(index.row(), 0);
 972
 973                     if (!d->lastSelection.contains(selectIndex))
 974                     {
 975                         selection << QItemSelectionRange(selectIndex);
 976                     }
 977                     else
 978                     {
 979                         deselection << QItemSelectionRange(selectIndex);
 980                     }
 981                 }
 982
 983                 selectionModel()->select(selection, QItemSelectionModel::Select);
 984                 selectionModel()->select(deselection, QItemSelectionModel::Deselect);
 985
 986                 break;
 987             }
 988         }
 989     }
 990
 991     d->lastSelection = selectionModel()->selection();
 992
 993     if (d->hovered.isValid())
 994         viewport()->update(visualRect(d->hovered));
 995     else if (!d->hoveredCategory.isEmpty())
 996         viewport()->update(d->categoryVisualRect(d->hoveredCategory));
 997 }
 998
 999 void KCategorizedView::leaveEvent(QEvent *event)
1000 {
1001     d->hovered = QModelIndex();
1002     d->hoveredCategory = QString();
1003
1004     QListView::leaveEvent(event);
1005 }
1006
1007 void KCategorizedView::startDrag(Qt::DropActions supportedActions)
1008 {
1009     // FIXME: QAbstractItemView does far better here since it sets the
1010     //        pixmap of selected icons to the dragging cursor, but it sets a non
1011     //        ARGB window so it is no transparent. Use QAbstractItemView when
1012     //        this is fixed on Qt.
1013     // QAbstractItemView::startDrag(supportedActions);
1014     QListView::startDrag(supportedActions);
1015
1016     d->isDragging = false;
1017     d->mouseButtonPressed = false;
1018
1019     viewport()->update(d->lastDraggedItemsRect);
1020 }
1021
1022 void KCategorizedView::dragMoveEvent(QDragMoveEvent *event)
1023 {
1024     d->mousePosition = event->pos();
1025
1026     if (d->mouseButtonPressed)
1027     {
1028         d->isDragging = true;
1029     }
1030     else
1031     {
1032         d->isDragging = false;
1033     }
1034
1035     d->dragLeftViewport = false;
1036
1037     if ((viewMode() != KCategorizedView::IconMode) || !d->proxyModel ||
1038         !d->categoryDrawer || !d->proxyModel->isCategorizedModel())
1039     {
1040         QListView::dragMoveEvent(event);
1041         return;
1042     }
1043
1044     d->drawDraggedItems();
1045 }
1046
1047 void KCategorizedView::dragLeaveEvent(QDragLeaveEvent *event)
1048 {
1049     d->dragLeftViewport = true;
1050
1051     QListView::dragLeaveEvent(event);
1052 }
1053
1054 QModelIndex KCategorizedView::moveCursor(CursorAction cursorAction,
1055                                          Qt::KeyboardModifiers modifiers)
1056 {
1057     if ((viewMode() != KCategorizedView::IconMode) ||
1058          !d->proxyModel ||
1059          !d->categoryDrawer ||
1060           d->categories.isEmpty() ||
1061          !d->proxyModel->isCategorizedModel()
1062        )
1063     {
1064         return QListView::moveCursor(cursorAction, modifiers);
1065     }
1066
1067     const QModelIndex current = selectionModel()->currentIndex();
1068
1069     int viewportWidth = viewport()->width() - spacing();
1070     int itemWidth;
1071
1072     if (gridSize().isEmpty())
1073     {
1074         itemWidth = d->biggestItemSize.width();
1075     }
1076     else
1077     {
1078         itemWidth = gridSize().width();
1079     }
1080
1081     int itemWidthPlusSeparation = spacing() + itemWidth;
1082     int elementsPerRow = viewportWidth / itemWidthPlusSeparation;
1083
1084     QString lastCategory = d->categories.first();
1085     QString theCategory = d->categories.first();
1086     QString afterCategory = d->categories.first();
1087
1088     bool hasToBreak = false;
1089     foreach (const QString &category, d->categories)
1090     {
1091         if (hasToBreak)
1092         {
1093             afterCategory = category;
1094
1095             break;
1096         }
1097
1098         if (category == d->elementsInfo[current.row()].category)
1099         {
1100             theCategory = category;
1101
1102             hasToBreak = true;
1103         }
1104
1105         if (!hasToBreak)
1106         {
1107             lastCategory = category;
1108         }
1109     }
1110
1111     switch (cursorAction)
1112     {
1113         case QAbstractItemView::MoveUp: {
1114             if (d->elementsInfo[current.row()].relativeOffsetToCategory >= elementsPerRow)
1115             {
1116                 int indexToMove = current.row();
1117                 indexToMove -= qMin(((d->elementsInfo[current.row()].relativeOffsetToCategory) + d->forcedSelectionPosition), elementsPerRow - d->forcedSelectionPosition + (d->elementsInfo[current.row()].relativeOffsetToCategory % elementsPerRow));
1118
1119                 return d->proxyModel->index(indexToMove, 0);
1120             }
1121             else
1122             {
1123                 int lastCategoryLastRow = (d->categoriesIndexes[lastCategory].count() - 1) % elementsPerRow;
1124                 int indexToMove = current.row() - d->elementsInfo[current.row()].relativeOffsetToCategory;
1125
1126                 if (d->forcedSelectionPosition >= lastCategoryLastRow)
1127                 {
1128                     indexToMove -= 1;
1129                 }
1130                 else
1131                 {
1132                     indexToMove -= qMin((lastCategoryLastRow - d->forcedSelectionPosition + 1), d->forcedSelectionPosition + elementsPerRow + 1);
1133                 }
1134
1135                 return d->proxyModel->index(indexToMove, 0);
1136             }
1137         }
1138
1139         case QAbstractItemView::MoveDown: {
1140             if (d->elementsInfo[current.row()].relativeOffsetToCategory < (d->categoriesIndexes[theCategory].count() - 1 - ((d->categoriesIndexes[theCategory].count() - 1) % elementsPerRow)))
1141             {
1142                 int indexToMove = current.row();
1143                 indexToMove += qMin(elementsPerRow, d->categoriesIndexes[theCategory].count() - 1 - d->elementsInfo[current.row()].relativeOffsetToCategory);
1144
1145                 return d->proxyModel->index(indexToMove, 0);
1146             }
1147             else
1148             {
1149                 int afterCategoryLastRow = qMin(elementsPerRow, d->categoriesIndexes[afterCategory].count());
1150                 int indexToMove = current.row() + (d->categoriesIndexes[theCategory].count() - d->elementsInfo[current.row()].relativeOffsetToCategory);
1151
1152                 if (d->forcedSelectionPosition >= afterCategoryLastRow)
1153                 {
1154                     indexToMove += afterCategoryLastRow - 1;
1155                 }
1156                 else
1157                 {
1158                     indexToMove += qMin(d->forcedSelectionPosition, elementsPerRow);
1159                 }
1160
1161                 return d->proxyModel->index(indexToMove, 0);
1162             }
1163         }
1164
1165         case QAbstractItemView::MoveLeft:
1166             if (layoutDirection() == Qt::RightToLeft)
1167             {
1168                 d->forcedSelectionPosition = d->elementsInfo[current.row() + 1].relativeOffsetToCategory % elementsPerRow;
1169
1170                 if (d->forcedSelectionPosition < 0)
1171                     d->forcedSelectionPosition = (d->categoriesIndexes[theCategory].count() - 1) % elementsPerRow;
1172
1173                 return d->proxyModel->index(current.row() + 1, 0);
1174             }
1175
1176             d->forcedSelectionPosition = d->elementsInfo[current.row() - 1].relativeOffsetToCategory % elementsPerRow;
1177
1178             if (d->forcedSelectionPosition < 0)
1179                 d->forcedSelectionPosition = (d->categoriesIndexes[theCategory].count() - 1) % elementsPerRow;
1180
1181             return d->proxyModel->index(current.row() - 1, 0);
1182
1183         case QAbstractItemView::MoveRight:
1184             if (layoutDirection() == Qt::RightToLeft)
1185             {
1186                 d->forcedSelectionPosition = d->elementsInfo[current.row() - 1].relativeOffsetToCategory % elementsPerRow;
1187
1188                 if (d->forcedSelectionPosition < 0)
1189                     d->forcedSelectionPosition = (d->categoriesIndexes[theCategory].count() - 1) % elementsPerRow;
1190
1191                 return d->proxyModel->index(current.row() - 1, 0);
1192             }
1193
1194             d->forcedSelectionPosition = d->elementsInfo[current.row() + 1].relativeOffsetToCategory % elementsPerRow;
1195
1196             if (d->forcedSelectionPosition < 0)
1197                 d->forcedSelectionPosition = (d->categoriesIndexes[theCategory].count() - 1) % elementsPerRow;
1198
1199             return d->proxyModel->index(current.row() + 1, 0);
1200
1201         default:
1202             break;
1203     }
1204
1205     return QListView::moveCursor(cursorAction, modifiers);
1206 }
1207
1208 void KCategorizedView::rowsInserted(const QModelIndex &parent,
1209                                     int start,
1210                                     int end)
1211 {
1212     QListView::rowsInserted(parent, start, end);
1213
1214     if ((viewMode() != KCategorizedView::IconMode) || !d->proxyModel ||
1215         !d->categoryDrawer || !d->proxyModel->isCategorizedModel())
1216     {
1217         d->lastSelection = QItemSelection();
1218         d->currentViewIndex = QModelIndex();
1219         d->forcedSelectionPosition = 0;
1220         d->elementsInfo.clear();
1221         d->elementsPosition.clear();
1222         d->categoriesIndexes.clear();
1223         d->categoriesPosition.clear();
1224         d->categories.clear();
1225         d->intersectedIndexes.clear();
1226         d->modelIndexList.clear();
1227         d->hovered = QModelIndex();
1228         d->biggestItemSize = QSize(0, 0);
1229         d->mouseButtonPressed = false;
1230
1231         return;
1232     }
1233
1234     rowsInsertedArtifficial(parent, start, end);
1235 }
1236
1237 void KCategorizedView::rowsInsertedArtifficial(const QModelIndex &parent,
1238                                                int start,
1239                                                int end)
1240 {
1241     Q_UNUSED(parent);
1242
1243     d->lastSelection = QItemSelection();
1244     d->currentViewIndex = QModelIndex();
1245     d->forcedSelectionPosition = 0;
1246     d->elementsInfo.clear();
1247     d->elementsPosition.clear();
1248     d->categoriesIndexes.clear();
1249     d->categoriesPosition.clear();
1250     d->categories.clear();
1251     d->intersectedIndexes.clear();
1252     d->modelIndexList.clear();
1253     d->hovered = QModelIndex();
1254     d->biggestItemSize = QSize(0, 0);
1255     d->mouseButtonPressed = false;
1256
1257     if (start > end || end < 0 || start < 0 || !d->proxyModel->rowCount())
1258     {
1259         return;
1260     }
1261
1262     // Add all elements mapped to the source model and explore categories
1263     QString prevCategory = d->proxyModel->data(d->proxyModel->index(0, d->proxyModel->sortColumn()), KCategorizedSortFilterProxyModel::CategoryRole).toString();
1264     QString lastCategory = prevCategory;
1265     QModelIndexList modelIndexList;
1266     struct Private::ElementInfo elementInfo;
1267     int offset = -1;
1268     for (int k = 0; k < d->proxyModel->rowCount(); ++k)
1269     {
1270         QModelIndex index = d->proxyModel->index(k, d->proxyModel->sortColumn());
1271         QModelIndex indexSize = d->proxyModel->index(k, 0);
1272
1273         d->biggestItemSize = QSize(qMax(sizeHintForIndex(indexSize).width(),
1274                                         d->biggestItemSize.width()),
1275                                    qMax(sizeHintForIndex(indexSize).height(),
1276                                         d->biggestItemSize.height()));
1277
1278         d->modelIndexList << index;
1279
1280         lastCategory = d->proxyModel->data(index, KCategorizedSortFilterProxyModel::CategoryRole).toString();
1281
1282         elementInfo.category = lastCategory;
1283
1284         if (prevCategory != lastCategory)
1285         {
1286             offset = 0;
1287             d->categoriesIndexes.insert(prevCategory, modelIndexList);
1288             d->categories << prevCategory;
1289             modelIndexList.clear();
1290         }
1291         else
1292         {
1293             offset++;
1294         }
1295
1296         elementInfo.relativeOffsetToCategory = offset;
1297
1298         modelIndexList << index;
1299         prevCategory = lastCategory;
1300
1301         d->elementsInfo.insert(index.row(), elementInfo);
1302     }
1303
1304     d->categoriesIndexes.insert(prevCategory, modelIndexList);
1305     d->categories << prevCategory;
1306
1307     d->updateScrollbars();
1308 }
1309
1310 void KCategorizedView::rowsRemoved(const QModelIndex &parent,
1311                                    int start,
1312                                    int end)
1313 {
1314     if ((viewMode() == KCategorizedView::IconMode) && d->proxyModel &&
1315         d->categoryDrawer && d->proxyModel->isCategorizedModel())
1316     {
1317         // Force the view to update all elements
1318         rowsInsertedArtifficial(QModelIndex(), 0, d->proxyModel->rowCount() - 1);
1319     }
1320 }
1321
1322 void KCategorizedView::updateGeometries()
1323 {
1324     if ((viewMode() != KCategorizedView::IconMode) || !d->proxyModel ||
1325         !d->categoryDrawer || !d->proxyModel->isCategorizedModel())
1326     {
1327         QListView::updateGeometries();
1328         return;
1329     }
1330
1331     // Avoid QListView::updateGeometries(), since it will try to set another
1332     // range to our scroll bars, what we don't want (ereslibre)
1333     QAbstractItemView::updateGeometries();
1334 }
1335
1336 void KCategorizedView::slotLayoutChanged()
1337 {
1338     if ((viewMode() == KCategorizedView::IconMode) && d->proxyModel &&
1339         d->categoryDrawer && d->proxyModel->isCategorizedModel() &&
1340         ((d->modelSortRole != d->proxyModel->sortRole()) ||
1341          (d->modelSortColumn != d->proxyModel->sortColumn()) ||
1342          (d->modelSortOrder != d->proxyModel->sortOrder()) ||
1343          (d->modelCategorized != d->proxyModel->isCategorizedModel())))
1344     {
1345         // Force the view to update all elements
1346         rowsInsertedArtifficial(QModelIndex(), 0, d->proxyModel->rowCount() - 1);
1347
1348         d->modelSortRole = d->proxyModel->sortRole();
1349         d->modelSortColumn = d->proxyModel->sortColumn();
1350         d->modelCategorized = d->proxyModel->isCategorizedModel();
1351         d->modelSortOrder = d->proxyModel->sortOrder();
1352     }
1353     else if ((viewMode() == KCategorizedView::IconMode) && d->proxyModel &&
1354              d->categoryDrawer && d->proxyModel->isCategorizedModel())
1355     {
1356         d->updateScrollbars();
1357     }
1358 }
1359
1360 #include "kcategorizedview.moc"