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           (modelLastRowCount != proxyModel->rowCount()) ||
 426           (modelCategorized != proxyModel->isCategorizedModel()))))
 427     {
 428         // Force the view to update all elements
 429         listView->rowsInsertedArtifficial(QModelIndex(), 0, proxyModel->rowCount() - 1);
 430
 431         if (!forceItemReload)
 432         {
 433             modelSortRole = proxyModel->sortRole();
 434             modelSortColumn = proxyModel->sortColumn();
 435             modelSortOrder = proxyModel->sortOrder();
 436             modelLastRowCount = proxyModel->rowCount();
 437             modelCategorized = proxyModel->isCategorizedModel();
 438         }
 439     }
 440     else if ((listView->viewMode() == KCategorizedView::IconMode) && proxyModel &&
 441              categoryDrawer && proxyModel->isCategorizedModel())
 442     {
 443         updateScrollbars();
 444     }
 445 }
 446
 447 void KCategorizedView::Private::drawDraggedItems()
 448 {
 449     QRect rectToUpdate;
 450     QRect currentRect;
 451     foreach (const QModelIndex &index, listView->selectionModel()->selectedIndexes())
 452     {
 453         int dx = mousePosition.x() - initialPressPosition.x() + listView->horizontalOffset();
 454         int dy = mousePosition.y() - initialPressPosition.y() + listView->verticalOffset();
 455
 456         currentRect = visualRect(index);
 457         currentRect.adjust(dx, dy, dx, dy);
 458
 459         if (currentRect.intersects(listView->viewport()->rect()))
 460         {
 461             rectToUpdate = rectToUpdate.united(currentRect);
 462         }
 463     }
 464
 465     listView->viewport()->update(lastDraggedItemsRect.united(rectToUpdate));
 466
 467     lastDraggedItemsRect = rectToUpdate;
 468 }
 469
 470
 471 //==============================================================================
 472
 473
 474 KCategorizedView::KCategorizedView(QWidget *parent)
 475     : QListView(parent)
 476     , d(new Private(this))
 477 {
 478 }
 479
 480 KCategorizedView::~KCategorizedView()
 481 {
 482     delete d;
 483 }
 484
 485 void KCategorizedView::setGridSize(const QSize &size)
 486 {
 487     QListView::setGridSize(size);
 488
 489     d->layoutChanged(true);
 490 }
 491
 492 void KCategorizedView::setModel(QAbstractItemModel *model)
 493 {
 494     d->lastSelection = QItemSelection();
 495     d->currentViewIndex = QModelIndex();
 496     d->forcedSelectionPosition = 0;
 497     d->elementsInfo.clear();
 498     d->elementsPosition.clear();
 499     d->categoriesIndexes.clear();
 500     d->categoriesPosition.clear();
 501     d->categories.clear();
 502     d->intersectedIndexes.clear();
 503     d->modelIndexList.clear();
 504     d->hovered = QModelIndex();
 505     d->mouseButtonPressed = false;
 506
 507     if (d->proxyModel)
 508     {
 509         QObject::disconnect(d->proxyModel,
 510                             SIGNAL(layoutChanged()),
 511                             this, SLOT(slotLayoutChanged()));
 512
 513         QObject::disconnect(d->proxyModel,
 514                             SIGNAL(dataChanged(QModelIndex,QModelIndex)),
 515                             this, SLOT(slotLayoutChanged()));
 516
 517         QObject::disconnect(d->proxyModel,
 518                             SIGNAL(rowsRemoved(QModelIndex,int,int)),
 519                             this, SLOT(rowsRemoved(QModelIndex,int,int)));
 520     }
 521
 522     QListView::setModel(model);
 523
 524     d->proxyModel = dynamic_cast<KCategorizedSortFilterProxyModel*>(model);
 525
 526     if (d->proxyModel)
 527     {
 528         d->modelSortRole = d->proxyModel->sortRole();
 529         d->modelSortColumn = d->proxyModel->sortColumn();
 530         d->modelSortOrder = d->proxyModel->sortOrder();
 531         d->modelLastRowCount = d->proxyModel->rowCount();
 532         d->modelCategorized = d->proxyModel->isCategorizedModel();
 533
 534         QObject::connect(d->proxyModel,
 535                          SIGNAL(layoutChanged()),
 536                          this, SLOT(slotLayoutChanged()));
 537
 538         QObject::connect(d->proxyModel,
 539                          SIGNAL(dataChanged(QModelIndex,QModelIndex)),
 540                          this, SLOT(slotLayoutChanged()));
 541
 542         QObject::connect(d->proxyModel,
 543                          SIGNAL(rowsRemoved(QModelIndex,int,int)),
 544                          this, SLOT(rowsRemoved(QModelIndex,int,int)));
 545
 546         if (d->proxyModel->rowCount())
 547         {
 548             d->layoutChanged(true);
 549         }
 550     }
 551     else
 552     {
 553         d->modelCategorized = false;
 554     }
 555 }
 556
 557 QRect KCategorizedView::visualRect(const QModelIndex &index) const
 558 {
 559     if ((viewMode() != KCategorizedView::IconMode) || !d->proxyModel ||
 560         !d->categoryDrawer || !d->proxyModel->isCategorizedModel())
 561     {
 562         return QListView::visualRect(index);
 563     }
 564
 565     if (!qobject_cast<const QSortFilterProxyModel*>(index.model()))
 566     {
 567         return d->visualRect(d->proxyModel->mapFromSource(index));
 568     }
 569
 570     return d->visualRect(index);
 571 }
 572
 573 KCategoryDrawer *KCategorizedView::categoryDrawer() const
 574 {
 575     return d->categoryDrawer;
 576 }
 577
 578 void KCategorizedView::setCategoryDrawer(KCategoryDrawer *categoryDrawer)
 579 {
 580     d->lastSelection = QItemSelection();
 581     d->currentViewIndex = QModelIndex();
 582     d->forcedSelectionPosition = 0;
 583     d->elementsInfo.clear();
 584     d->elementsPosition.clear();
 585     d->categoriesIndexes.clear();
 586     d->categoriesPosition.clear();
 587     d->categories.clear();
 588     d->intersectedIndexes.clear();
 589     d->modelIndexList.clear();
 590     d->hovered = QModelIndex();
 591     d->mouseButtonPressed = false;
 592
 593     if (!categoryDrawer && d->proxyModel)
 594     {
 595         QObject::disconnect(d->proxyModel,
 596                             SIGNAL(layoutChanged()),
 597                             this, SLOT(slotLayoutChanged()));
 598
 599         QObject::disconnect(d->proxyModel,
 600                             SIGNAL(dataChanged(QModelIndex,QModelIndex)),
 601                             this, SLOT(slotLayoutChanged()));
 602
 603         QObject::disconnect(d->proxyModel,
 604                             SIGNAL(rowsRemoved(QModelIndex,int,int)),
 605                             this, SLOT(rowsRemoved(QModelIndex,int,int)));
 606     }
 607     else if (categoryDrawer && d->proxyModel)
 608     {
 609         QObject::connect(d->proxyModel,
 610                          SIGNAL(layoutChanged()),
 611                          this, SLOT(slotLayoutChanged()));
 612
 613         QObject::connect(d->proxyModel,
 614                          SIGNAL(dataChanged(QModelIndex,QModelIndex)),
 615                          this, SLOT(slotLayoutChanged()));
 616
 617         QObject::connect(d->proxyModel,
 618                          SIGNAL(rowsRemoved(QModelIndex,int,int)),
 619                          this, SLOT(rowsRemoved(QModelIndex,int,int)));
 620     }
 621
 622     d->categoryDrawer = categoryDrawer;
 623
 624     if (categoryDrawer)
 625     {
 626         if (d->proxyModel)
 627         {
 628             if (d->proxyModel->rowCount())
 629             {
 630                 d->layoutChanged(true);
 631             }
 632         }
 633     }
 634     else
 635     {
 636         updateGeometries();
 637     }
 638 }
 639
 640 QModelIndex KCategorizedView::indexAt(const QPoint &point) const
 641 {
 642     if ((viewMode() != KCategorizedView::IconMode) || !d->proxyModel ||
 643         !d->categoryDrawer || !d->proxyModel->isCategorizedModel())
 644     {
 645         return QListView::indexAt(point);
 646     }
 647
 648     QModelIndex index;
 649
 650     QModelIndexList item = d->intersectionSet(QRect(point, point));
 651
 652     if (item.count() == 1)
 653     {
 654         index = item[0];
 655     }
 656
 657     d->hovered = index;
 658
 659     return index;
 660 }
 661
 662 void KCategorizedView::reset()
 663 {
 664     QListView::reset();
 665
 666     d->lastSelection = QItemSelection();
 667     d->currentViewIndex = QModelIndex();
 668     d->forcedSelectionPosition = 0;
 669     d->elementsInfo.clear();
 670     d->elementsPosition.clear();
 671     d->categoriesIndexes.clear();
 672     d->categoriesPosition.clear();
 673     d->categories.clear();
 674     d->intersectedIndexes.clear();
 675     d->modelIndexList.clear();
 676     d->hovered = QModelIndex();
 677     d->biggestItemSize = QSize(0, 0);
 678     d->mouseButtonPressed = false;
 679 }
 680
 681 void KCategorizedView::paintEvent(QPaintEvent *event)
 682 {
 683     if ((viewMode() != KCategorizedView::IconMode) || !d->proxyModel ||
 684         !d->categoryDrawer || !d->proxyModel->isCategorizedModel())
 685     {
 686         QListView::paintEvent(event);
 687         return;
 688     }
 689
 690     QStyleOptionViewItemV3 option = viewOptions();
 691     option.widget = this;
 692     if (wordWrap())
 693     {
 694         option.features |= QStyleOptionViewItemV2::WrapText;
 695     }
 696
 697     QPainter painter(viewport());
 698     QRect area = event->rect();
 699     const bool focus = (hasFocus() || viewport()->hasFocus()) &&
 700                         currentIndex().isValid();
 701     const QStyle::State state = option.state;
 702     const bool enabled = (state & QStyle::State_Enabled) != 0;
 703
 704     painter.save();
 705
 706     QModelIndexList dirtyIndexes = d->intersectionSet(area);
 707     foreach (const QModelIndex &index, dirtyIndexes)
 708     {
 709         option.state = state;
 710         option.rect = visualRect(index);
 711
 712         if (selectionModel() && selectionModel()->isSelected(index))
 713         {
 714             option.state |= QStyle::State_Selected;
 715         }
 716
 717         if (enabled)
 718         {
 719             QPalette::ColorGroup cg;
 720             if ((d->proxyModel->flags(index) & Qt::ItemIsEnabled) == 0)
 721             {
 722                 option.state &= ~QStyle::State_Enabled;
 723                 cg = QPalette::Disabled;
 724             }
 725             else
 726             {
 727                 cg = QPalette::Normal;
 728             }
 729             option.palette.setCurrentColorGroup(cg);
 730         }
 731
 732         if (focus && currentIndex() == index)
 733         {
 734             option.state |= QStyle::State_HasFocus;
 735             if (this->state() == EditingState)
 736                 option.state |= QStyle::State_Editing;
 737         }
 738
 739         if ((index == d->hovered) && !d->mouseButtonPressed)
 740             option.state |= QStyle::State_MouseOver;
 741         else
 742             option.state &= ~QStyle::State_MouseOver;
 743
 744         itemDelegate(index)->paint(&painter, option, index);
 745     }
 746
 747     // Redraw categories
 748     QStyleOptionViewItem otherOption;
 749     bool intersectedInThePast = false;
 750     foreach (const QString &category, d->categories)
 751     {
 752         otherOption = option;
 753         otherOption.rect = d->categoryVisualRect(category);
 754         otherOption.state &= ~QStyle::State_MouseOver;
 755
 756         if (otherOption.rect.intersects(area))
 757         {
 758             intersectedInThePast = true;
 759
 760             QModelIndex indexToDraw = d->proxyModel->index(d->categoriesIndexes[category][0].row(), d->proxyModel->sortColumn());
 761
 762             d->drawNewCategory(indexToDraw,
 763                                d->proxyModel->sortRole(), otherOption, &painter);
 764         }
 765         else if (intersectedInThePast)
 766         {
 767             break; // the visible area has been finished, we don't need to keep asking, the rest won't intersect
 768                    // this is doable because we know that categories are correctly ordered on the list
 769         }
 770     }
 771
 772     if (d->mouseButtonPressed && !d->isDragging)
 773     {
 774         QPoint start, end, initialPressPosition;
 775
 776         initialPressPosition = d->initialPressPosition;
 777
 778         initialPressPosition.setY(initialPressPosition.y() - verticalOffset());
 779         initialPressPosition.setX(initialPressPosition.x() - horizontalOffset());
 780
 781         if (d->initialPressPosition.x() > d->mousePosition.x() ||
 782             d->initialPressPosition.y() > d->mousePosition.y())
 783         {
 784             start = d->mousePosition;
 785             end = initialPressPosition;
 786         }
 787         else
 788         {
 789             start = initialPressPosition;
 790             end = d->mousePosition;
 791         }
 792
 793         QStyleOptionRubberBand yetAnotherOption;
 794         yetAnotherOption.initFrom(this);
 795         yetAnotherOption.shape = QRubberBand::Rectangle;
 796         yetAnotherOption.opaque = false;
 797         yetAnotherOption.rect = QRect(start, end).intersected(viewport()->rect().adjusted(-16, -16, 16, 16));
 798         painter.save();
 799         style()->drawControl(QStyle::CE_RubberBand, &yetAnotherOption, &painter);
 800         painter.restore();
 801     }
 802
 803     if (d->isDragging && !d->dragLeftViewport)
 804     {
 805         painter.setOpacity(0.5);
 806         d->drawDraggedItems(&painter);
 807     }
 808
 809     painter.restore();
 810 }
 811
 812 void KCategorizedView::resizeEvent(QResizeEvent *event)
 813 {
 814     QListView::resizeEvent(event);
 815
 816     // Clear the items positions cache
 817     d->elementsPosition.clear();
 818     d->categoriesPosition.clear();
 819     d->forcedSelectionPosition = 0;
 820
 821     if ((viewMode() != KCategorizedView::IconMode) || !d->proxyModel ||
 822         !d->categoryDrawer || !d->proxyModel->isCategorizedModel())
 823     {
 824         return;
 825     }
 826
 827     d->updateScrollbars();
 828 }
 829
 830 void KCategorizedView::setSelection(const QRect &rect,
 831                                     QItemSelectionModel::SelectionFlags flags)
 832 {
 833     if ((viewMode() != KCategorizedView::IconMode) || !d->proxyModel ||
 834         !d->categoryDrawer || !d->proxyModel->isCategorizedModel())
 835     {
 836         QListView::setSelection(rect, flags);
 837         return;
 838     }
 839
 840     if (!flags)
 841         return;
 842
 843     if (flags & QItemSelectionModel::Clear)
 844     {
 845         if (!rect.intersects(d->categoryVisualRect(d->hoveredCategory)))
 846         {
 847             d->lastSelection = QItemSelection();
 848         }
 849     }
 850
 851     selectionModel()->clear();
 852
 853     QModelIndexList dirtyIndexes = d->intersectionSet(rect);
 854
 855     if (!dirtyIndexes.count())
 856     {
 857         if (!d->lastSelection.isEmpty() &&
 858             (rect.intersects(d->categoryVisualRect(d->hoveredCategory)) || d->mouseButtonPressed))
 859         {
 860             selectionModel()->select(d->lastSelection, flags);
 861         }
 862
 863         return;
 864     }
 865
 866     QItemSelection selection;
 867
 868     if (!d->mouseButtonPressed)
 869     {
 870         selection = QItemSelection(dirtyIndexes[0], dirtyIndexes[0]);
 871         d->currentViewIndex = dirtyIndexes[0];
 872     }
 873     else
 874     {
 875         QModelIndex first = dirtyIndexes[0];
 876         QModelIndex last;
 877         foreach (const QModelIndex &index, dirtyIndexes)
 878         {
 879             if (last.isValid() && last.row() + 1 != index.row())
 880             {
 881                 QItemSelectionRange range(first, last);
 882
 883                 selection << range;
 884
 885                 first = index;
 886             }
 887
 888             last = index;
 889         }
 890
 891         if (last.isValid())
 892             selection << QItemSelectionRange(first, last);
 893     }
 894
 895     if (d->lastSelection.count())
 896     {
 897         if ((selection.count() == 1) && (selection[0].indexes().count() == 1))
 898             selection.merge(d->lastSelection, flags);
 899         else
 900             selection.merge(d->lastSelection, QItemSelectionModel::Select);
 901     }
 902
 903     selectionModel()->select(selection, flags);
 904 }
 905
 906 void KCategorizedView::mouseMoveEvent(QMouseEvent *event)
 907 {
 908     QListView::mouseMoveEvent(event);
 909
 910     if ((viewMode() != KCategorizedView::IconMode) || !d->proxyModel ||
 911         !d->categoryDrawer || !d->proxyModel->isCategorizedModel())
 912     {
 913         return;
 914     }
 915
 916     const QString previousHoveredCategory = d->hoveredCategory;
 917
 918     d->mousePosition = event->pos();
 919     d->hoveredCategory = QString();
 920
 921     // Redraw categories
 922     foreach (const QString &category, d->categories)
 923     {
 924         if (d->categoryVisualRect(category).intersects(QRect(event->pos(), event->pos())))
 925         {
 926             d->hoveredCategory = category;
 927             viewport()->update(d->categoryVisualRect(category));
 928         }
 929         else if ((category == previousHoveredCategory) &&
 930                  (!d->categoryVisualRect(previousHoveredCategory).intersects(QRect(event->pos(), event->pos()))))
 931         {
 932             viewport()->update(d->categoryVisualRect(category));
 933         }
 934     }
 935
 936     QRect rect;
 937     if (d->mouseButtonPressed && !d->isDragging)
 938     {
 939         QPoint start, end, initialPressPosition;
 940
 941         initialPressPosition = d->initialPressPosition;
 942
 943         initialPressPosition.setY(initialPressPosition.y() - verticalOffset());
 944         initialPressPosition.setX(initialPressPosition.x() - horizontalOffset());
 945
 946         if (d->initialPressPosition.x() > d->mousePosition.x() ||
 947             d->initialPressPosition.y() > d->mousePosition.y())
 948         {
 949             start = d->mousePosition;
 950             end = initialPressPosition;
 951         }
 952         else
 953         {
 954             start = initialPressPosition;
 955             end = d->mousePosition;
 956         }
 957
 958         rect = QRect(start, end).intersected(viewport()->rect().adjusted(-16, -16, 16, 16));
 959
 960         //viewport()->update(rect.united(d->lastSelectionRect));
 961
 962         d->lastSelectionRect = rect;
 963     }
 964 }
 965
 966 void KCategorizedView::mousePressEvent(QMouseEvent *event)
 967 {
 968     d->dragLeftViewport = false;
 969
 970     if (event->button() == Qt::LeftButton)
 971     {
 972         d->mouseButtonPressed = true;
 973
 974         d->initialPressPosition = event->pos();
 975         d->initialPressPosition.setY(d->initialPressPosition.y() +
 976                                                               verticalOffset());
 977         d->initialPressPosition.setX(d->initialPressPosition.x() +
 978                                                             horizontalOffset());
 979     }
 980
 981     QListView::mousePressEvent(event);
 982
 983     viewport()->update(d->categoryVisualRect(d->hoveredCategory));
 984 }
 985
 986 void KCategorizedView::mouseReleaseEvent(QMouseEvent *event)
 987 {
 988     d->mouseButtonPressed = false;
 989
 990     QListView::mouseReleaseEvent(event);
 991
 992     if ((viewMode() != KCategorizedView::IconMode) || !d->proxyModel ||
 993         !d->categoryDrawer || !d->proxyModel->isCategorizedModel())
 994     {
 995         return;
 996     }
 997
 998     QPoint initialPressPosition = viewport()->mapFromGlobal(QCursor::pos());
 999     initialPressPosition.setY(initialPressPosition.y() + verticalOffset());
1000     initialPressPosition.setX(initialPressPosition.x() + horizontalOffset());
1001
1002     QItemSelection selection;
1003     QItemSelection deselection;
1004
1005     if (initialPressPosition == d->initialPressPosition)
1006     {
1007         foreach(const QString &category, d->categories)
1008         {
1009             if (d->categoryVisualRect(category).contains(event->pos()))
1010             {
1011                 foreach (const QModelIndex &index, d->categoriesIndexes[category])
1012                 {
1013                     QModelIndex selectIndex = index.model()->index(index.row(), 0);
1014
1015                     if (!d->lastSelection.contains(selectIndex))
1016                     {
1017                         selection << QItemSelectionRange(selectIndex);
1018                     }
1019                     else
1020                     {
1021                         deselection << QItemSelectionRange(selectIndex);
1022                     }
1023                 }
1024
1025                 selectionModel()->select(selection, QItemSelectionModel::Select);
1026                 selectionModel()->select(deselection, QItemSelectionModel::Deselect);
1027
1028                 break;
1029             }
1030         }
1031     }
1032
1033     d->lastSelection = selectionModel()->selection();
1034
1035     if (d->hovered.isValid())
1036         viewport()->update(visualRect(d->hovered));
1037     else if (!d->hoveredCategory.isEmpty())
1038         viewport()->update(d->categoryVisualRect(d->hoveredCategory));
1039 }
1040
1041 void KCategorizedView::leaveEvent(QEvent *event)
1042 {
1043     d->hovered = QModelIndex();
1044     d->hoveredCategory = QString();
1045
1046     QListView::leaveEvent(event);
1047 }
1048
1049 void KCategorizedView::startDrag(Qt::DropActions supportedActions)
1050 {
1051     // FIXME: QAbstractItemView does far better here since it sets the
1052     //        pixmap of selected icons to the dragging cursor, but it sets a non
1053     //        ARGB window so it is no transparent. Use QAbstractItemView when
1054     //        this is fixed on Qt.
1055     // QAbstractItemView::startDrag(supportedActions);
1056     QListView::startDrag(supportedActions);
1057
1058     d->isDragging = false;
1059     d->mouseButtonPressed = false;
1060
1061     viewport()->update(d->lastDraggedItemsRect);
1062 }
1063
1064 void KCategorizedView::dragMoveEvent(QDragMoveEvent *event)
1065 {
1066     d->mousePosition = event->pos();
1067
1068     if (d->mouseButtonPressed)
1069     {
1070         d->isDragging = true;
1071     }
1072     else
1073     {
1074         d->isDragging = false;
1075     }
1076
1077     d->dragLeftViewport = false;
1078
1079     if ((viewMode() != KCategorizedView::IconMode) || !d->proxyModel ||
1080         !d->categoryDrawer || !d->proxyModel->isCategorizedModel())
1081     {
1082         QListView::dragMoveEvent(event);
1083         return;
1084     }
1085
1086     d->drawDraggedItems();
1087 }
1088
1089 void KCategorizedView::dragLeaveEvent(QDragLeaveEvent *event)
1090 {
1091     d->dragLeftViewport = true;
1092
1093     QListView::dragLeaveEvent(event);
1094 }
1095
1096 QModelIndex KCategorizedView::moveCursor(CursorAction cursorAction,
1097                                          Qt::KeyboardModifiers modifiers)
1098 {
1099     if ((viewMode() != KCategorizedView::IconMode) ||
1100          !d->proxyModel ||
1101          !d->categoryDrawer ||
1102           d->categories.isEmpty() ||
1103          !d->proxyModel->isCategorizedModel()
1104        )
1105     {
1106         return QListView::moveCursor(cursorAction, modifiers);
1107     }
1108
1109     const QModelIndex current = selectionModel()->currentIndex();
1110
1111     int viewportWidth = viewport()->width() - spacing();
1112     int itemWidth;
1113
1114     if (gridSize().isEmpty())
1115     {
1116         itemWidth = d->biggestItemSize.width();
1117     }
1118     else
1119     {
1120         itemWidth = gridSize().width();
1121     }
1122
1123     int itemWidthPlusSeparation = spacing() + itemWidth;
1124     int elementsPerRow = viewportWidth / itemWidthPlusSeparation;
1125
1126     QString lastCategory = d->categories.first();
1127     QString theCategory = d->categories.first();
1128     QString afterCategory = d->categories.first();
1129
1130     bool hasToBreak = false;
1131     foreach (const QString &category, d->categories)
1132     {
1133         if (hasToBreak)
1134         {
1135             afterCategory = category;
1136
1137             break;
1138         }
1139
1140         if (category == d->elementsInfo[current.row()].category)
1141         {
1142             theCategory = category;
1143
1144             hasToBreak = true;
1145         }
1146
1147         if (!hasToBreak)
1148         {
1149             lastCategory = category;
1150         }
1151     }
1152
1153     switch (cursorAction)
1154     {
1155         case QAbstractItemView::MoveUp: {
1156             if (d->elementsInfo[current.row()].relativeOffsetToCategory >= elementsPerRow)
1157             {
1158                 int indexToMove = current.row();
1159                 indexToMove -= qMin(((d->elementsInfo[current.row()].relativeOffsetToCategory) + d->forcedSelectionPosition), elementsPerRow - d->forcedSelectionPosition + (d->elementsInfo[current.row()].relativeOffsetToCategory % elementsPerRow));
1160
1161                 return d->proxyModel->index(indexToMove, 0);
1162             }
1163             else
1164             {
1165                 int lastCategoryLastRow = (d->categoriesIndexes[lastCategory].count() - 1) % elementsPerRow;
1166                 int indexToMove = current.row() - d->elementsInfo[current.row()].relativeOffsetToCategory;
1167
1168                 if (d->forcedSelectionPosition >= lastCategoryLastRow)
1169                 {
1170                     indexToMove -= 1;
1171                 }
1172                 else
1173                 {
1174                     indexToMove -= qMin((lastCategoryLastRow - d->forcedSelectionPosition + 1), d->forcedSelectionPosition + elementsPerRow + 1);
1175                 }
1176
1177                 return d->proxyModel->index(indexToMove, 0);
1178             }
1179         }
1180
1181         case QAbstractItemView::MoveDown: {
1182             if (d->elementsInfo[current.row()].relativeOffsetToCategory < (d->categoriesIndexes[theCategory].count() - 1 - ((d->categoriesIndexes[theCategory].count() - 1) % elementsPerRow)))
1183             {
1184                 int indexToMove = current.row();
1185                 indexToMove += qMin(elementsPerRow, d->categoriesIndexes[theCategory].count() - 1 - d->elementsInfo[current.row()].relativeOffsetToCategory);
1186
1187                 return d->proxyModel->index(indexToMove, 0);
1188             }
1189             else
1190             {
1191                 int afterCategoryLastRow = qMin(elementsPerRow, d->categoriesIndexes[afterCategory].count());
1192                 int indexToMove = current.row() + (d->categoriesIndexes[theCategory].count() - d->elementsInfo[current.row()].relativeOffsetToCategory);
1193
1194                 if (d->forcedSelectionPosition >= afterCategoryLastRow)
1195                 {
1196                     indexToMove += afterCategoryLastRow - 1;
1197                 }
1198                 else
1199                 {
1200                     indexToMove += qMin(d->forcedSelectionPosition, elementsPerRow);
1201                 }
1202
1203                 return d->proxyModel->index(indexToMove, 0);
1204             }
1205         }
1206
1207         case QAbstractItemView::MoveLeft:
1208             if (layoutDirection() == Qt::RightToLeft)
1209             {
1210                 d->forcedSelectionPosition = d->elementsInfo[current.row() + 1].relativeOffsetToCategory % elementsPerRow;
1211
1212                 if (d->forcedSelectionPosition < 0)
1213                     d->forcedSelectionPosition = (d->categoriesIndexes[theCategory].count() - 1) % elementsPerRow;
1214
1215                 return d->proxyModel->index(current.row() + 1, 0);
1216             }
1217
1218             d->forcedSelectionPosition = d->elementsInfo[current.row() - 1].relativeOffsetToCategory % elementsPerRow;
1219
1220             if (d->forcedSelectionPosition < 0)
1221                 d->forcedSelectionPosition = (d->categoriesIndexes[theCategory].count() - 1) % elementsPerRow;
1222
1223             return d->proxyModel->index(current.row() - 1, 0);
1224
1225         case QAbstractItemView::MoveRight:
1226             if (layoutDirection() == Qt::RightToLeft)
1227             {
1228                 d->forcedSelectionPosition = d->elementsInfo[current.row() - 1].relativeOffsetToCategory % elementsPerRow;
1229
1230                 if (d->forcedSelectionPosition < 0)
1231                     d->forcedSelectionPosition = (d->categoriesIndexes[theCategory].count() - 1) % elementsPerRow;
1232
1233                 return d->proxyModel->index(current.row() - 1, 0);
1234             }
1235
1236             d->forcedSelectionPosition = d->elementsInfo[current.row() + 1].relativeOffsetToCategory % elementsPerRow;
1237
1238             if (d->forcedSelectionPosition < 0)
1239                 d->forcedSelectionPosition = (d->categoriesIndexes[theCategory].count() - 1) % elementsPerRow;
1240
1241             return d->proxyModel->index(current.row() + 1, 0);
1242
1243         default:
1244             break;
1245     }
1246
1247     return QListView::moveCursor(cursorAction, modifiers);
1248 }
1249
1250 void KCategorizedView::rowsInserted(const QModelIndex &parent,
1251                                     int start,
1252                                     int end)
1253 {
1254     QListView::rowsInserted(parent, start, end);
1255
1256     if ((viewMode() != KCategorizedView::IconMode) || !d->proxyModel ||
1257         !d->categoryDrawer || !d->proxyModel->isCategorizedModel())
1258     {
1259         d->lastSelection = QItemSelection();
1260         d->currentViewIndex = QModelIndex();
1261         d->forcedSelectionPosition = 0;
1262         d->elementsInfo.clear();
1263         d->elementsPosition.clear();
1264         d->categoriesIndexes.clear();
1265         d->categoriesPosition.clear();
1266         d->categories.clear();
1267         d->intersectedIndexes.clear();
1268         d->modelIndexList.clear();
1269         d->hovered = QModelIndex();
1270         d->biggestItemSize = QSize(0, 0);
1271         d->mouseButtonPressed = false;
1272
1273         return;
1274     }
1275
1276     rowsInsertedArtifficial(parent, start, end);
1277 }
1278
1279 void KCategorizedView::rowsInsertedArtifficial(const QModelIndex &parent,
1280                                                int start,
1281                                                int end)
1282 {
1283     Q_UNUSED(parent);
1284
1285     d->lastSelection = QItemSelection();
1286     d->currentViewIndex = QModelIndex();
1287     d->forcedSelectionPosition = 0;
1288     d->elementsInfo.clear();
1289     d->elementsPosition.clear();
1290     d->categoriesIndexes.clear();
1291     d->categoriesPosition.clear();
1292     d->categories.clear();
1293     d->intersectedIndexes.clear();
1294     d->modelIndexList.clear();
1295     d->hovered = QModelIndex();
1296     d->biggestItemSize = QSize(0, 0);
1297     d->mouseButtonPressed = false;
1298
1299     if (start > end || end < 0 || start < 0 || !d->proxyModel->rowCount())
1300     {
1301         return;
1302     }
1303
1304     // Add all elements mapped to the source model and explore categories
1305     QString prevCategory = d->proxyModel->data(d->proxyModel->index(0, d->proxyModel->sortColumn()), KCategorizedSortFilterProxyModel::CategoryRole).toString();
1306     QString lastCategory = prevCategory;
1307     QModelIndexList modelIndexList;
1308     struct Private::ElementInfo elementInfo;
1309     int offset = -1;
1310     for (int k = 0; k < d->proxyModel->rowCount(); ++k)
1311     {
1312         QModelIndex index = d->proxyModel->index(k, d->proxyModel->sortColumn());
1313         QModelIndex indexSize = d->proxyModel->index(k, 0);
1314
1315         d->biggestItemSize = QSize(qMax(sizeHintForIndex(indexSize).width(),
1316                                         d->biggestItemSize.width()),
1317                                    qMax(sizeHintForIndex(indexSize).height(),
1318                                         d->biggestItemSize.height()));
1319
1320         d->modelIndexList << index;
1321
1322         lastCategory = d->proxyModel->data(index, KCategorizedSortFilterProxyModel::CategoryRole).toString();
1323
1324         elementInfo.category = lastCategory;
1325
1326         if (prevCategory != lastCategory)
1327         {
1328             offset = 0;
1329             d->categoriesIndexes.insert(prevCategory, modelIndexList);
1330             d->categories << prevCategory;
1331             modelIndexList.clear();
1332         }
1333         else
1334         {
1335             offset++;
1336         }
1337
1338         elementInfo.relativeOffsetToCategory = offset;
1339
1340         modelIndexList << index;
1341         prevCategory = lastCategory;
1342
1343         d->elementsInfo.insert(index.row(), elementInfo);
1344     }
1345
1346     d->categoriesIndexes.insert(prevCategory, modelIndexList);
1347     d->categories << prevCategory;
1348
1349     d->updateScrollbars();
1350 }
1351
1352 void KCategorizedView::rowsRemoved(const QModelIndex &parent,
1353                                    int start,
1354                                    int end)
1355 {
1356     if ((viewMode() == KCategorizedView::IconMode) && d->proxyModel &&
1357         d->categoryDrawer && d->proxyModel->isCategorizedModel())
1358     {
1359         // Force the view to update all elements
1360         rowsInsertedArtifficial(QModelIndex(), 0, d->proxyModel->rowCount() - 1);
1361     }
1362 }
1363
1364 void KCategorizedView::updateGeometries()
1365 {
1366     if ((viewMode() != KCategorizedView::IconMode) || !d->proxyModel ||
1367         !d->categoryDrawer || !d->proxyModel->isCategorizedModel())
1368     {
1369         QListView::updateGeometries();
1370         return;
1371     }
1372
1373     // Avoid QListView::updateGeometries(), since it will try to set another
1374     // range to our scroll bars, what we don't want (ereslibre)
1375     QAbstractItemView::updateGeometries();
1376 }
1377
1378 void KCategorizedView::slotLayoutChanged()
1379 {
1380     d->layoutChanged();
1381 }
1382
1383 #include "kcategorizedview.moc"