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::layoutChanged(bool forceItemReload)
 418 {
 419     if ((listView->viewMode() == KCategorizedView::IconMode) && proxyModel &&
 420         categoryDrawer && proxyModel->isCategorizedModel() &&
 421         ((forceItemReload ||
 422           (modelSortRole != proxyModel->sortRole()) ||
 423           (modelSortColumn != proxyModel->sortColumn()) ||
 424           (modelSortOrder != proxyModel->sortOrder()) ||
 425           (modelCategorized != proxyModel->isCategorizedModel()))))
 426     {
 427         // Force the view to update all elements
 428         listView->rowsInsertedArtifficial(QModelIndex(), 0, proxyModel->rowCount() - 1);
 429
 430         if (!forceItemReload)
 431         {
 432             modelSortRole = proxyModel->sortRole();
 433             modelSortColumn = proxyModel->sortColumn();
 434             modelSortOrder = proxyModel->sortOrder();
 435             modelCategorized = proxyModel->isCategorizedModel();
 436         }
 437     }
 438     else if ((listView->viewMode() == KCategorizedView::IconMode) && proxyModel &&
 439              categoryDrawer && proxyModel->isCategorizedModel())
 440     {
 441         updateScrollbars();
 442     }
 443 }
 444
 445 void KCategorizedView::Private::drawDraggedItems()
 446 {
 447     QRect rectToUpdate;
 448     QRect currentRect;
 449     foreach (const QModelIndex &index, listView->selectionModel()->selectedIndexes())
 450     {
 451         int dx = mousePosition.x() - initialPressPosition.x() + listView->horizontalOffset();
 452         int dy = mousePosition.y() - initialPressPosition.y() + listView->verticalOffset();
 453
 454         currentRect = visualRect(index);
 455         currentRect.adjust(dx, dy, dx, dy);
 456
 457         if (currentRect.intersects(listView->viewport()->rect()))
 458         {
 459             rectToUpdate = rectToUpdate.united(currentRect);
 460         }
 461     }
 462
 463     listView->viewport()->update(lastDraggedItemsRect.united(rectToUpdate));
 464
 465     lastDraggedItemsRect = rectToUpdate;
 466 }
 467
 468
 469 //==============================================================================
 470
 471
 472 KCategorizedView::KCategorizedView(QWidget *parent)
 473     : QListView(parent)
 474     , d(new Private(this))
 475 {
 476 }
 477
 478 KCategorizedView::~KCategorizedView()
 479 {
 480     delete d;
 481 }
 482
 483 void KCategorizedView::setGridSize(const QSize &size)
 484 {
 485     QListView::setGridSize(size);
 486
 487     d->layoutChanged(true);
 488 }
 489
 490 void KCategorizedView::setModel(QAbstractItemModel *model)
 491 {
 492     d->lastSelection = QItemSelection();
 493     d->currentViewIndex = QModelIndex();
 494     d->forcedSelectionPosition = 0;
 495     d->elementsInfo.clear();
 496     d->elementsPosition.clear();
 497     d->categoriesIndexes.clear();
 498     d->categoriesPosition.clear();
 499     d->categories.clear();
 500     d->intersectedIndexes.clear();
 501     d->modelIndexList.clear();
 502     d->hovered = QModelIndex();
 503     d->mouseButtonPressed = false;
 504
 505     if (d->proxyModel)
 506     {
 507         QObject::disconnect(d->proxyModel,
 508                             SIGNAL(layoutChanged()),
 509                             this, SLOT(slotLayoutChanged()));
 510
 511         QObject::disconnect(d->proxyModel,
 512                             SIGNAL(dataChanged(QModelIndex,QModelIndex)),
 513                             this, SLOT(slotLayoutChanged()));
 514
 515         QObject::disconnect(d->proxyModel,
 516                             SIGNAL(rowsRemoved(QModelIndex,int,int)),
 517                             this, SLOT(rowsRemoved(QModelIndex,int,int)));
 518     }
 519
 520     QListView::setModel(model);
 521
 522     d->proxyModel = dynamic_cast<KCategorizedSortFilterProxyModel*>(model);
 523
 524     if (d->proxyModel)
 525     {
 526         d->modelSortRole = d->proxyModel->sortRole();
 527         d->modelSortColumn = d->proxyModel->sortColumn();
 528         d->modelSortOrder = d->proxyModel->sortOrder();
 529         d->modelCategorized = d->proxyModel->isCategorizedModel();
 530
 531         QObject::connect(d->proxyModel,
 532                          SIGNAL(layoutChanged()),
 533                          this, SLOT(slotLayoutChanged()));
 534
 535         QObject::connect(d->proxyModel,
 536                          SIGNAL(dataChanged(QModelIndex,QModelIndex)),
 537                          this, SLOT(slotLayoutChanged()));
 538
 539         QObject::connect(d->proxyModel,
 540                          SIGNAL(rowsRemoved(QModelIndex,int,int)),
 541                          this, SLOT(rowsRemoved(QModelIndex,int,int)));
 542
 543         if (d->proxyModel->rowCount())
 544         {
 545             d->layoutChanged(true);
 546         }
 547     }
 548     else
 549     {
 550         d->modelCategorized = false;
 551     }
 552 }
 553
 554 QRect KCategorizedView::visualRect(const QModelIndex &index) const
 555 {
 556     if ((viewMode() != KCategorizedView::IconMode) || !d->proxyModel ||
 557         !d->categoryDrawer || !d->proxyModel->isCategorizedModel())
 558     {
 559         return QListView::visualRect(index);
 560     }
 561
 562     if (!qobject_cast<const QSortFilterProxyModel*>(index.model()))
 563     {
 564         return d->visualRect(d->proxyModel->mapFromSource(index));
 565     }
 566
 567     return d->visualRect(index);
 568 }
 569
 570 KCategoryDrawer *KCategorizedView::categoryDrawer() const
 571 {
 572     return d->categoryDrawer;
 573 }
 574
 575 void KCategorizedView::setCategoryDrawer(KCategoryDrawer *categoryDrawer)
 576 {
 577     d->lastSelection = QItemSelection();
 578     d->currentViewIndex = QModelIndex();
 579     d->forcedSelectionPosition = 0;
 580     d->elementsInfo.clear();
 581     d->elementsPosition.clear();
 582     d->categoriesIndexes.clear();
 583     d->categoriesPosition.clear();
 584     d->categories.clear();
 585     d->intersectedIndexes.clear();
 586     d->modelIndexList.clear();
 587     d->hovered = QModelIndex();
 588     d->mouseButtonPressed = false;
 589
 590     if (!categoryDrawer && d->proxyModel)
 591     {
 592         QObject::disconnect(d->proxyModel,
 593                             SIGNAL(layoutChanged()),
 594                             this, SLOT(slotLayoutChanged()));
 595
 596         QObject::disconnect(d->proxyModel,
 597                             SIGNAL(dataChanged(QModelIndex,QModelIndex)),
 598                             this, SLOT(slotLayoutChanged()));
 599
 600         QObject::disconnect(d->proxyModel,
 601                             SIGNAL(rowsRemoved(QModelIndex,int,int)),
 602                             this, SLOT(rowsRemoved(QModelIndex,int,int)));
 603     }
 604     else if (categoryDrawer && d->proxyModel)
 605     {
 606         QObject::connect(d->proxyModel,
 607                          SIGNAL(layoutChanged()),
 608                          this, SLOT(slotLayoutChanged()));
 609
 610         QObject::connect(d->proxyModel,
 611                          SIGNAL(dataChanged(QModelIndex,QModelIndex)),
 612                          this, SLOT(slotLayoutChanged()));
 613
 614         QObject::connect(d->proxyModel,
 615                          SIGNAL(rowsRemoved(QModelIndex,int,int)),
 616                          this, SLOT(rowsRemoved(QModelIndex,int,int)));
 617     }
 618
 619     d->categoryDrawer = categoryDrawer;
 620
 621     if (categoryDrawer)
 622     {
 623         if (d->proxyModel)
 624         {
 625             if (d->proxyModel->rowCount())
 626             {
 627                 d->layoutChanged(true);
 628             }
 629         }
 630     }
 631     else
 632     {
 633         updateGeometries();
 634     }
 635 }
 636
 637 QModelIndex KCategorizedView::indexAt(const QPoint &point) const
 638 {
 639     if ((viewMode() != KCategorizedView::IconMode) || !d->proxyModel ||
 640         !d->categoryDrawer || !d->proxyModel->isCategorizedModel())
 641     {
 642         return QListView::indexAt(point);
 643     }
 644
 645     QModelIndex index;
 646
 647     QModelIndexList item = d->intersectionSet(QRect(point, point));
 648
 649     if (item.count() == 1)
 650     {
 651         index = item[0];
 652     }
 653
 654     d->hovered = index;
 655
 656     return index;
 657 }
 658
 659 void KCategorizedView::reset()
 660 {
 661     QListView::reset();
 662
 663     d->lastSelection = QItemSelection();
 664     d->currentViewIndex = QModelIndex();
 665     d->forcedSelectionPosition = 0;
 666     d->elementsInfo.clear();
 667     d->elementsPosition.clear();
 668     d->categoriesIndexes.clear();
 669     d->categoriesPosition.clear();
 670     d->categories.clear();
 671     d->intersectedIndexes.clear();
 672     d->modelIndexList.clear();
 673     d->hovered = QModelIndex();
 674     d->biggestItemSize = QSize(0, 0);
 675     d->mouseButtonPressed = false;
 676 }
 677
 678 void KCategorizedView::paintEvent(QPaintEvent *event)
 679 {
 680     if ((viewMode() != KCategorizedView::IconMode) || !d->proxyModel ||
 681         !d->categoryDrawer || !d->proxyModel->isCategorizedModel())
 682     {
 683         QListView::paintEvent(event);
 684         return;
 685     }
 686
 687     QStyleOptionViewItemV3 option = viewOptions();
 688     option.widget = this;
 689     if (wordWrap())
 690     {
 691         option.features |= QStyleOptionViewItemV2::WrapText;
 692     }
 693
 694     QPainter painter(viewport());
 695     QRect area = event->rect();
 696     const bool focus = (hasFocus() || viewport()->hasFocus()) &&
 697                         currentIndex().isValid();
 698     const QStyle::State state = option.state;
 699     const bool enabled = (state & QStyle::State_Enabled) != 0;
 700
 701     painter.save();
 702
 703     QModelIndexList dirtyIndexes = d->intersectionSet(area);
 704     foreach (const QModelIndex &index, dirtyIndexes)
 705     {
 706         option.state = state;
 707         option.rect = visualRect(index);
 708
 709         if (selectionModel() && selectionModel()->isSelected(index))
 710         {
 711             option.state |= QStyle::State_Selected;
 712         }
 713
 714         if (enabled)
 715         {
 716             QPalette::ColorGroup cg;
 717             if ((d->proxyModel->flags(index) & Qt::ItemIsEnabled) == 0)
 718             {
 719                 option.state &= ~QStyle::State_Enabled;
 720                 cg = QPalette::Disabled;
 721             }
 722             else
 723             {
 724                 cg = QPalette::Normal;
 725             }
 726             option.palette.setCurrentColorGroup(cg);
 727         }
 728
 729         if (focus && currentIndex() == index)
 730         {
 731             option.state |= QStyle::State_HasFocus;
 732             if (this->state() == EditingState)
 733                 option.state |= QStyle::State_Editing;
 734         }
 735
 736         if ((index == d->hovered) && !d->mouseButtonPressed)
 737             option.state |= QStyle::State_MouseOver;
 738         else
 739             option.state &= ~QStyle::State_MouseOver;
 740
 741         itemDelegate(index)->paint(&painter, option, index);
 742     }
 743
 744     // Redraw categories
 745     QStyleOptionViewItem otherOption;
 746     bool intersectedInThePast = false;
 747     foreach (const QString &category, d->categories)
 748     {
 749         otherOption = option;
 750         otherOption.rect = d->categoryVisualRect(category);
 751         otherOption.state &= ~QStyle::State_MouseOver;
 752
 753         if (otherOption.rect.intersects(area))
 754         {
 755             intersectedInThePast = true;
 756
 757             QModelIndex indexToDraw = d->proxyModel->index(d->categoriesIndexes[category][0].row(), d->proxyModel->sortColumn());
 758
 759             d->drawNewCategory(indexToDraw,
 760                                d->proxyModel->sortRole(), otherOption, &painter);
 761         }
 762         else if (intersectedInThePast)
 763         {
 764             break; // the visible area has been finished, we don't need to keep asking, the rest won't intersect
 765                    // this is doable because we know that categories are correctly ordered on the list
 766         }
 767     }
 768
 769     if (d->mouseButtonPressed && !d->isDragging)
 770     {
 771         QPoint start, end, initialPressPosition;
 772
 773         initialPressPosition = d->initialPressPosition;
 774
 775         initialPressPosition.setY(initialPressPosition.y() - verticalOffset());
 776         initialPressPosition.setX(initialPressPosition.x() - horizontalOffset());
 777
 778         if (d->initialPressPosition.x() > d->mousePosition.x() ||
 779             d->initialPressPosition.y() > d->mousePosition.y())
 780         {
 781             start = d->mousePosition;
 782             end = initialPressPosition;
 783         }
 784         else
 785         {
 786             start = initialPressPosition;
 787             end = d->mousePosition;
 788         }
 789
 790         QStyleOptionRubberBand yetAnotherOption;
 791         yetAnotherOption.initFrom(this);
 792         yetAnotherOption.shape = QRubberBand::Rectangle;
 793         yetAnotherOption.opaque = false;
 794         yetAnotherOption.rect = QRect(start, end).intersected(viewport()->rect().adjusted(-16, -16, 16, 16));
 795         painter.save();
 796         style()->drawControl(QStyle::CE_RubberBand, &yetAnotherOption, &painter);
 797         painter.restore();
 798     }
 799
 800     if (d->isDragging && !d->dragLeftViewport)
 801     {
 802         painter.setOpacity(0.5);
 803         d->drawDraggedItems(&painter);
 804     }
 805
 806     painter.restore();
 807 }
 808
 809 void KCategorizedView::resizeEvent(QResizeEvent *event)
 810 {
 811     QListView::resizeEvent(event);
 812
 813     // Clear the items positions cache
 814     d->elementsPosition.clear();
 815     d->categoriesPosition.clear();
 816     d->forcedSelectionPosition = 0;
 817
 818     if ((viewMode() != KCategorizedView::IconMode) || !d->proxyModel ||
 819         !d->categoryDrawer || !d->proxyModel->isCategorizedModel())
 820     {
 821         return;
 822     }
 823
 824     d->updateScrollbars();
 825 }
 826
 827 void KCategorizedView::setSelection(const QRect &rect,
 828                                     QItemSelectionModel::SelectionFlags flags)
 829 {
 830     if ((viewMode() != KCategorizedView::IconMode) || !d->proxyModel ||
 831         !d->categoryDrawer || !d->proxyModel->isCategorizedModel())
 832     {
 833         QListView::setSelection(rect, flags);
 834         return;
 835     }
 836
 837     if (!flags)
 838         return;
 839
 840     if (flags & QItemSelectionModel::Clear)
 841     {
 842         if (!rect.intersects(d->categoryVisualRect(d->hoveredCategory)))
 843         {
 844             d->lastSelection = QItemSelection();
 845         }
 846     }
 847
 848     selectionModel()->clear();
 849
 850     QModelIndexList dirtyIndexes = d->intersectionSet(rect);
 851
 852     if (!dirtyIndexes.count())
 853     {
 854         if (!d->lastSelection.isEmpty() &&
 855             (rect.intersects(d->categoryVisualRect(d->hoveredCategory)) || d->mouseButtonPressed))
 856         {
 857             selectionModel()->select(d->lastSelection, flags);
 858         }
 859
 860         return;
 861     }
 862
 863     QItemSelection selection;
 864
 865     if (!d->mouseButtonPressed)
 866     {
 867         selection = QItemSelection(dirtyIndexes[0], dirtyIndexes[0]);
 868         d->currentViewIndex = dirtyIndexes[0];
 869     }
 870     else
 871     {
 872         QModelIndex first = dirtyIndexes[0];
 873         QModelIndex last;
 874         foreach (const QModelIndex &index, dirtyIndexes)
 875         {
 876             if (last.isValid() && last.row() + 1 != index.row())
 877             {
 878                 QItemSelectionRange range(first, last);
 879
 880                 selection << range;
 881
 882                 first = index;
 883             }
 884
 885             last = index;
 886         }
 887
 888         if (last.isValid())
 889             selection << QItemSelectionRange(first, last);
 890     }
 891
 892     if (d->lastSelection.count())
 893     {
 894         if ((selection.count() == 1) && (selection[0].indexes().count() == 1))
 895             selection.merge(d->lastSelection, flags);
 896         else
 897             selection.merge(d->lastSelection, QItemSelectionModel::Select);
 898     }
 899
 900     selectionModel()->select(selection, flags);
 901 }
 902
 903 void KCategorizedView::mouseMoveEvent(QMouseEvent *event)
 904 {
 905     QListView::mouseMoveEvent(event);
 906
 907     if ((viewMode() != KCategorizedView::IconMode) || !d->proxyModel ||
 908         !d->categoryDrawer || !d->proxyModel->isCategorizedModel())
 909     {
 910         return;
 911     }
 912
 913     const QString previousHoveredCategory = d->hoveredCategory;
 914
 915     d->mousePosition = event->pos();
 916     d->hoveredCategory = QString();
 917
 918     // Redraw categories
 919     foreach (const QString &category, d->categories)
 920     {
 921         if (d->categoryVisualRect(category).intersects(QRect(event->pos(), event->pos())))
 922         {
 923             d->hoveredCategory = category;
 924             viewport()->update(d->categoryVisualRect(category));
 925         }
 926         else if ((category == previousHoveredCategory) &&
 927                  (!d->categoryVisualRect(previousHoveredCategory).intersects(QRect(event->pos(), event->pos()))))
 928         {
 929             viewport()->update(d->categoryVisualRect(category));
 930         }
 931     }
 932
 933     QRect rect;
 934     if (d->mouseButtonPressed && !d->isDragging)
 935     {
 936         QPoint start, end, initialPressPosition;
 937
 938         initialPressPosition = d->initialPressPosition;
 939
 940         initialPressPosition.setY(initialPressPosition.y() - verticalOffset());
 941         initialPressPosition.setX(initialPressPosition.x() - horizontalOffset());
 942
 943         if (d->initialPressPosition.x() > d->mousePosition.x() ||
 944             d->initialPressPosition.y() > d->mousePosition.y())
 945         {
 946             start = d->mousePosition;
 947             end = initialPressPosition;
 948         }
 949         else
 950         {
 951             start = initialPressPosition;
 952             end = d->mousePosition;
 953         }
 954
 955         rect = QRect(start, end).intersected(viewport()->rect().adjusted(-16, -16, 16, 16));
 956
 957         //viewport()->update(rect.united(d->lastSelectionRect));
 958
 959         d->lastSelectionRect = rect;
 960     }
 961 }
 962
 963 void KCategorizedView::mousePressEvent(QMouseEvent *event)
 964 {
 965     d->dragLeftViewport = false;
 966
 967     if (event->button() == Qt::LeftButton)
 968     {
 969         d->mouseButtonPressed = true;
 970
 971         d->initialPressPosition = event->pos();
 972         d->initialPressPosition.setY(d->initialPressPosition.y() +
 973                                                               verticalOffset());
 974         d->initialPressPosition.setX(d->initialPressPosition.x() +
 975                                                             horizontalOffset());
 976     }
 977
 978     QListView::mousePressEvent(event);
 979
 980     viewport()->update(d->categoryVisualRect(d->hoveredCategory));
 981 }
 982
 983 void KCategorizedView::mouseReleaseEvent(QMouseEvent *event)
 984 {
 985     d->mouseButtonPressed = false;
 986
 987     QListView::mouseReleaseEvent(event);
 988
 989     if ((viewMode() != KCategorizedView::IconMode) || !d->proxyModel ||
 990         !d->categoryDrawer || !d->proxyModel->isCategorizedModel())
 991     {
 992         return;
 993     }
 994
 995     QPoint initialPressPosition = viewport()->mapFromGlobal(QCursor::pos());
 996     initialPressPosition.setY(initialPressPosition.y() + verticalOffset());
 997     initialPressPosition.setX(initialPressPosition.x() + horizontalOffset());
 998
 999     QItemSelection selection;
1000     QItemSelection deselection;
1001
1002     if (initialPressPosition == d->initialPressPosition)
1003     {
1004         foreach(const QString &category, d->categories)
1005         {
1006             if (d->categoryVisualRect(category).contains(event->pos()))
1007             {
1008                 foreach (const QModelIndex &index, d->categoriesIndexes[category])
1009                 {
1010                     QModelIndex selectIndex = index.model()->index(index.row(), 0);
1011
1012                     if (!d->lastSelection.contains(selectIndex))
1013                     {
1014                         selection << QItemSelectionRange(selectIndex);
1015                     }
1016                     else
1017                     {
1018                         deselection << QItemSelectionRange(selectIndex);
1019                     }
1020                 }
1021
1022                 selectionModel()->select(selection, QItemSelectionModel::Select);
1023                 selectionModel()->select(deselection, QItemSelectionModel::Deselect);
1024
1025                 break;
1026             }
1027         }
1028     }
1029
1030     d->lastSelection = selectionModel()->selection();
1031
1032     if (d->hovered.isValid())
1033         viewport()->update(visualRect(d->hovered));
1034     else if (!d->hoveredCategory.isEmpty())
1035         viewport()->update(d->categoryVisualRect(d->hoveredCategory));
1036 }
1037
1038 void KCategorizedView::leaveEvent(QEvent *event)
1039 {
1040     d->hovered = QModelIndex();
1041     d->hoveredCategory = QString();
1042
1043     QListView::leaveEvent(event);
1044 }
1045
1046 void KCategorizedView::startDrag(Qt::DropActions supportedActions)
1047 {
1048     // FIXME: QAbstractItemView does far better here since it sets the
1049     //        pixmap of selected icons to the dragging cursor, but it sets a non
1050     //        ARGB window so it is no transparent. Use QAbstractItemView when
1051     //        this is fixed on Qt.
1052     // QAbstractItemView::startDrag(supportedActions);
1053     QListView::startDrag(supportedActions);
1054
1055     d->isDragging = false;
1056     d->mouseButtonPressed = false;
1057
1058     viewport()->update(d->lastDraggedItemsRect);
1059 }
1060
1061 void KCategorizedView::dragMoveEvent(QDragMoveEvent *event)
1062 {
1063     d->mousePosition = event->pos();
1064
1065     if (d->mouseButtonPressed)
1066     {
1067         d->isDragging = true;
1068     }
1069     else
1070     {
1071         d->isDragging = false;
1072     }
1073
1074     d->dragLeftViewport = false;
1075
1076     if ((viewMode() != KCategorizedView::IconMode) || !d->proxyModel ||
1077         !d->categoryDrawer || !d->proxyModel->isCategorizedModel())
1078     {
1079         QListView::dragMoveEvent(event);
1080         return;
1081     }
1082
1083     d->drawDraggedItems();
1084 }
1085
1086 void KCategorizedView::dragLeaveEvent(QDragLeaveEvent *event)
1087 {
1088     d->dragLeftViewport = true;
1089
1090     QListView::dragLeaveEvent(event);
1091 }
1092
1093 QModelIndex KCategorizedView::moveCursor(CursorAction cursorAction,
1094                                          Qt::KeyboardModifiers modifiers)
1095 {
1096     if ((viewMode() != KCategorizedView::IconMode) ||
1097          !d->proxyModel ||
1098          !d->categoryDrawer ||
1099           d->categories.isEmpty() ||
1100          !d->proxyModel->isCategorizedModel()
1101        )
1102     {
1103         return QListView::moveCursor(cursorAction, modifiers);
1104     }
1105
1106     const QModelIndex current = selectionModel()->currentIndex();
1107
1108     int viewportWidth = viewport()->width() - spacing();
1109     int itemWidth;
1110
1111     if (gridSize().isEmpty())
1112     {
1113         itemWidth = d->biggestItemSize.width();
1114     }
1115     else
1116     {
1117         itemWidth = gridSize().width();
1118     }
1119
1120     int itemWidthPlusSeparation = spacing() + itemWidth;
1121     int elementsPerRow = viewportWidth / itemWidthPlusSeparation;
1122
1123     QString lastCategory = d->categories.first();
1124     QString theCategory = d->categories.first();
1125     QString afterCategory = d->categories.first();
1126
1127     bool hasToBreak = false;
1128     foreach (const QString &category, d->categories)
1129     {
1130         if (hasToBreak)
1131         {
1132             afterCategory = category;
1133
1134             break;
1135         }
1136
1137         if (category == d->elementsInfo[current.row()].category)
1138         {
1139             theCategory = category;
1140
1141             hasToBreak = true;
1142         }
1143
1144         if (!hasToBreak)
1145         {
1146             lastCategory = category;
1147         }
1148     }
1149
1150     switch (cursorAction)
1151     {
1152         case QAbstractItemView::MoveUp: {
1153             if (d->elementsInfo[current.row()].relativeOffsetToCategory >= elementsPerRow)
1154             {
1155                 int indexToMove = current.row();
1156                 indexToMove -= qMin(((d->elementsInfo[current.row()].relativeOffsetToCategory) + d->forcedSelectionPosition), elementsPerRow - d->forcedSelectionPosition + (d->elementsInfo[current.row()].relativeOffsetToCategory % elementsPerRow));
1157
1158                 return d->proxyModel->index(indexToMove, 0);
1159             }
1160             else
1161             {
1162                 int lastCategoryLastRow = (d->categoriesIndexes[lastCategory].count() - 1) % elementsPerRow;
1163                 int indexToMove = current.row() - d->elementsInfo[current.row()].relativeOffsetToCategory;
1164
1165                 if (d->forcedSelectionPosition >= lastCategoryLastRow)
1166                 {
1167                     indexToMove -= 1;
1168                 }
1169                 else
1170                 {
1171                     indexToMove -= qMin((lastCategoryLastRow - d->forcedSelectionPosition + 1), d->forcedSelectionPosition + elementsPerRow + 1);
1172                 }
1173
1174                 return d->proxyModel->index(indexToMove, 0);
1175             }
1176         }
1177
1178         case QAbstractItemView::MoveDown: {
1179             if (d->elementsInfo[current.row()].relativeOffsetToCategory < (d->categoriesIndexes[theCategory].count() - 1 - ((d->categoriesIndexes[theCategory].count() - 1) % elementsPerRow)))
1180             {
1181                 int indexToMove = current.row();
1182                 indexToMove += qMin(elementsPerRow, d->categoriesIndexes[theCategory].count() - 1 - d->elementsInfo[current.row()].relativeOffsetToCategory);
1183
1184                 return d->proxyModel->index(indexToMove, 0);
1185             }
1186             else
1187             {
1188                 int afterCategoryLastRow = qMin(elementsPerRow, d->categoriesIndexes[afterCategory].count());
1189                 int indexToMove = current.row() + (d->categoriesIndexes[theCategory].count() - d->elementsInfo[current.row()].relativeOffsetToCategory);
1190
1191                 if (d->forcedSelectionPosition >= afterCategoryLastRow)
1192                 {
1193                     indexToMove += afterCategoryLastRow - 1;
1194                 }
1195                 else
1196                 {
1197                     indexToMove += qMin(d->forcedSelectionPosition, elementsPerRow);
1198                 }
1199
1200                 return d->proxyModel->index(indexToMove, 0);
1201             }
1202         }
1203
1204         case QAbstractItemView::MoveLeft:
1205             if (layoutDirection() == Qt::RightToLeft)
1206             {
1207                 d->forcedSelectionPosition = d->elementsInfo[current.row() + 1].relativeOffsetToCategory % elementsPerRow;
1208
1209                 if (d->forcedSelectionPosition < 0)
1210                     d->forcedSelectionPosition = (d->categoriesIndexes[theCategory].count() - 1) % elementsPerRow;
1211
1212                 return d->proxyModel->index(current.row() + 1, 0);
1213             }
1214
1215             d->forcedSelectionPosition = d->elementsInfo[current.row() - 1].relativeOffsetToCategory % elementsPerRow;
1216
1217             if (d->forcedSelectionPosition < 0)
1218                 d->forcedSelectionPosition = (d->categoriesIndexes[theCategory].count() - 1) % elementsPerRow;
1219
1220             return d->proxyModel->index(current.row() - 1, 0);
1221
1222         case QAbstractItemView::MoveRight:
1223             if (layoutDirection() == Qt::RightToLeft)
1224             {
1225                 d->forcedSelectionPosition = d->elementsInfo[current.row() - 1].relativeOffsetToCategory % elementsPerRow;
1226
1227                 if (d->forcedSelectionPosition < 0)
1228                     d->forcedSelectionPosition = (d->categoriesIndexes[theCategory].count() - 1) % elementsPerRow;
1229
1230                 return d->proxyModel->index(current.row() - 1, 0);
1231             }
1232
1233             d->forcedSelectionPosition = d->elementsInfo[current.row() + 1].relativeOffsetToCategory % elementsPerRow;
1234
1235             if (d->forcedSelectionPosition < 0)
1236                 d->forcedSelectionPosition = (d->categoriesIndexes[theCategory].count() - 1) % elementsPerRow;
1237
1238             return d->proxyModel->index(current.row() + 1, 0);
1239
1240         default:
1241             break;
1242     }
1243
1244     return QListView::moveCursor(cursorAction, modifiers);
1245 }
1246
1247 void KCategorizedView::rowsInserted(const QModelIndex &parent,
1248                                     int start,
1249                                     int end)
1250 {
1251     QListView::rowsInserted(parent, start, end);
1252
1253     if ((viewMode() != KCategorizedView::IconMode) || !d->proxyModel ||
1254         !d->categoryDrawer || !d->proxyModel->isCategorizedModel())
1255     {
1256         d->lastSelection = QItemSelection();
1257         d->currentViewIndex = QModelIndex();
1258         d->forcedSelectionPosition = 0;
1259         d->elementsInfo.clear();
1260         d->elementsPosition.clear();
1261         d->categoriesIndexes.clear();
1262         d->categoriesPosition.clear();
1263         d->categories.clear();
1264         d->intersectedIndexes.clear();
1265         d->modelIndexList.clear();
1266         d->hovered = QModelIndex();
1267         d->biggestItemSize = QSize(0, 0);
1268         d->mouseButtonPressed = false;
1269
1270         return;
1271     }
1272
1273     rowsInsertedArtifficial(parent, start, end);
1274 }
1275
1276 void KCategorizedView::rowsInsertedArtifficial(const QModelIndex &parent,
1277                                                int start,
1278                                                int end)
1279 {
1280     Q_UNUSED(parent);
1281
1282     d->lastSelection = QItemSelection();
1283     d->currentViewIndex = QModelIndex();
1284     d->forcedSelectionPosition = 0;
1285     d->elementsInfo.clear();
1286     d->elementsPosition.clear();
1287     d->categoriesIndexes.clear();
1288     d->categoriesPosition.clear();
1289     d->categories.clear();
1290     d->intersectedIndexes.clear();
1291     d->modelIndexList.clear();
1292     d->hovered = QModelIndex();
1293     d->biggestItemSize = QSize(0, 0);
1294     d->mouseButtonPressed = false;
1295
1296     if (start > end || end < 0 || start < 0 || !d->proxyModel->rowCount())
1297     {
1298         return;
1299     }
1300
1301     // Add all elements mapped to the source model and explore categories
1302     QString prevCategory = d->proxyModel->data(d->proxyModel->index(0, d->proxyModel->sortColumn()), KCategorizedSortFilterProxyModel::CategoryRole).toString();
1303     QString lastCategory = prevCategory;
1304     QModelIndexList modelIndexList;
1305     struct Private::ElementInfo elementInfo;
1306     int offset = -1;
1307     for (int k = 0; k < d->proxyModel->rowCount(); ++k)
1308     {
1309         QModelIndex index = d->proxyModel->index(k, d->proxyModel->sortColumn());
1310         QModelIndex indexSize = d->proxyModel->index(k, 0);
1311
1312         d->biggestItemSize = QSize(qMax(sizeHintForIndex(indexSize).width(),
1313                                         d->biggestItemSize.width()),
1314                                    qMax(sizeHintForIndex(indexSize).height(),
1315                                         d->biggestItemSize.height()));
1316
1317         d->modelIndexList << index;
1318
1319         lastCategory = d->proxyModel->data(index, KCategorizedSortFilterProxyModel::CategoryRole).toString();
1320
1321         elementInfo.category = lastCategory;
1322
1323         if (prevCategory != lastCategory)
1324         {
1325             offset = 0;
1326             d->categoriesIndexes.insert(prevCategory, modelIndexList);
1327             d->categories << prevCategory;
1328             modelIndexList.clear();
1329         }
1330         else
1331         {
1332             offset++;
1333         }
1334
1335         elementInfo.relativeOffsetToCategory = offset;
1336
1337         modelIndexList << index;
1338         prevCategory = lastCategory;
1339
1340         d->elementsInfo.insert(index.row(), elementInfo);
1341     }
1342
1343     d->categoriesIndexes.insert(prevCategory, modelIndexList);
1344     d->categories << prevCategory;
1345
1346     d->updateScrollbars();
1347 }
1348
1349 void KCategorizedView::rowsRemoved(const QModelIndex &parent,
1350                                    int start,
1351                                    int end)
1352 {
1353     if ((viewMode() == KCategorizedView::IconMode) && d->proxyModel &&
1354         d->categoryDrawer && d->proxyModel->isCategorizedModel())
1355     {
1356         // Force the view to update all elements
1357         rowsInsertedArtifficial(QModelIndex(), 0, d->proxyModel->rowCount() - 1);
1358     }
1359 }
1360
1361 void KCategorizedView::updateGeometries()
1362 {
1363     if ((viewMode() != KCategorizedView::IconMode) || !d->proxyModel ||
1364         !d->categoryDrawer || !d->proxyModel->isCategorizedModel())
1365     {
1366         QListView::updateGeometries();
1367         return;
1368     }
1369
1370     // Avoid QListView::updateGeometries(), since it will try to set another
1371     // range to our scroll bars, what we don't want (ereslibre)
1372     QAbstractItemView::updateGeometries();
1373 }
1374
1375 void KCategorizedView::slotLayoutChanged()
1376 {
1377     d->layoutChanged();
1378 }
1379
1380 #include "kcategorizedview.moc"