src/kcategorizedview.cpp

   1 /**
   2   * This file is part of the KDE project
   3   * Copyright (C) 2007 Rafael Fernández López <ereslibre@kde.org>
   4   *
   5   * This library is free software; you can redistribute it and/or
   6   * modify it under the terms of the GNU Library General Public
   7   * License as published by the Free Software Foundation; either
   8   * version 2 of the License, or (at your option) any later version.
   9   *
  10   * This library is distributed in the hope that it will be useful,
  11   * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13   * Library General Public License for more details.
  14   *
  15   * You should have received a copy of the GNU Library General Public License
  16   * along with this library; see the file COPYING.LIB.  If not, write to
  17   * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  18   * Boston, MA 02110-1301, USA.
  19   */
  20
  21 #include "kcategorizedview.h"
  22 #include "kcategorizedview_p.h"
  23
  24 #include <math.h> // trunc on C99 compliant systems
  25 #include <kdefakes.h> // trunc for not C99 compliant systems
  26
  27 #include <QApplication>
  28 #include <QPainter>
  29 #include <QScrollBar>
  30 #include <QPaintEvent>
  31
  32 #include <kstyle.h>
  33
  34 #include "kcategorydrawer.h"
  35 #include "kcategorizedsortfilterproxymodel.h"
  36
  37 KCategorizedView::Private::Private(KCategorizedView *listView)
  38     : listView(listView)
  39     , categoryDrawer(0)
  40     , biggestItemSize(QSize(0, 0))
  41     , mouseButtonPressed(false)
  42     , isDragging(false)
  43     , dragLeftViewport(false)
  44     , proxyModel(0)
  45 {
  46 }
  47
  48 KCategorizedView::Private::~Private()
  49 {
  50 }
  51
  52 const QModelIndexList &KCategorizedView::Private::intersectionSet(const QRect &rect)
  53 {
  54     QModelIndex index;
  55     QRect indexVisualRect;
  56
  57     intersectedIndexes.clear();
  58
  59     int itemHeight;
  60
  61     if (listView->gridSize().isEmpty())
  62     {
  63         itemHeight = biggestItemSize.height();
  64     }
  65     else
  66     {
  67         itemHeight = listView->gridSize().height();
  68     }
  69
  70     // Lets find out where we should start
  71     int top = proxyModel->rowCount() - 1;
  72     int bottom = 0;
  73     int middle = (top + bottom) / 2;
  74     while (bottom <= top)
  75     {
  76         middle = (top + bottom) / 2;
  77
  78         index = proxyModel->index(middle, 0);
  79         indexVisualRect = visualRect(index);
  80         // We need the whole height (not only the visualRect). This will help us to update
  81         // all needed indexes correctly (ereslibre)
  82         indexVisualRect.setHeight(indexVisualRect.height() + (itemHeight - indexVisualRect.height()));
  83
  84         if (qMax(indexVisualRect.topLeft().y(),
  85                  indexVisualRect.bottomRight().y()) < qMin(rect.topLeft().y(),
  86                                                            rect.bottomRight().y()))
  87         {
  88             bottom = middle + 1;
  89         }
  90         else
  91         {
  92             top = middle - 1;
  93         }
  94     }
  95
  96     for (int i = middle; i < proxyModel->rowCount(); i++)
  97     {
  98         index = proxyModel->index(i, 0);
  99         indexVisualRect = visualRect(index);
 100
 101         if (rect.intersects(indexVisualRect))
 102             intersectedIndexes.append(index);
 103
 104         // If we passed next item, stop searching for hits
 105         if (qMax(rect.bottomRight().y(), rect.topLeft().y()) <
 106                                                   qMin(indexVisualRect.topLeft().y(),
 107                                                        indexVisualRect.bottomRight().y()))
 108             break;
 109     }
 110
 111     return intersectedIndexes;
 112 }
 113
 114 QRect KCategorizedView::Private::visualRectInViewport(const QModelIndex &index) const
 115 {
 116     if (!index.isValid())
 117         return QRect();
 118
 119     QString curCategory = elementsInfo[index.row()].category;
 120
 121     QRect retRect;
 122
 123     if (listView->layoutDirection() == Qt::LeftToRight)
 124     {
 125         retRect = QRect(listView->spacing(), listView->spacing() * 2 +
 126                         categoryDrawer->categoryHeight(listView->viewOptions()), 0, 0);
 127     }
 128     else
 129     {
 130         retRect = QRect(listView->viewport()->width() - listView->spacing(), listView->spacing() * 2 +
 131                         categoryDrawer->categoryHeight(listView->viewOptions()), 0, 0);
 132     }
 133
 134     int viewportWidth = listView->viewport()->width() - listView->spacing();
 135
 136     int itemHeight;
 137     int itemWidth;
 138
 139     if (listView->gridSize().isEmpty())
 140     {
 141         itemHeight = biggestItemSize.height();
 142         itemWidth = biggestItemSize.width();
 143     }
 144     else
 145     {
 146         itemHeight = listView->gridSize().height();
 147         itemWidth = listView->gridSize().width();
 148     }
 149
 150     int itemWidthPlusSeparation = listView->spacing() + itemWidth;
 151     int elementsPerRow = viewportWidth / itemWidthPlusSeparation;
 152     if (!elementsPerRow)
 153         elementsPerRow++;
 154
 155     int column = elementsInfo[index.row()].relativeOffsetToCategory % elementsPerRow;
 156     int row = elementsInfo[index.row()].relativeOffsetToCategory / elementsPerRow;
 157
 158     if (listView->layoutDirection() == Qt::LeftToRight)
 159     {
 160         retRect.setLeft(retRect.left() + column * listView->spacing() +
 161                         column * itemWidth);
 162     }
 163     else
 164     {
 165         retRect.setLeft(retRect.right() - column * listView->spacing() -
 166                          column * itemWidth - itemWidth);
 167
 168         retRect.setRight(retRect.right() - column * listView->spacing() -
 169                          column * itemWidth);
 170     }
 171
 172     foreach (const QString &category, categories)
 173     {
 174         if (category == curCategory)
 175             break;
 176
 177         float rows = (float) ((float) categoriesIndexes[category].count() /
 178                               (float) elementsPerRow);
 179
 180         int rowsInt = categoriesIndexes[category].count() / elementsPerRow;
 181
 182         if (rows - trunc(rows)) rowsInt++;
 183
 184         retRect.setTop(retRect.top() +
 185                        (rowsInt * itemHeight) +
 186                        categoryDrawer->categoryHeight(listView->viewOptions()) +
 187                        listView->spacing() * 2);
 188
 189         if (listView->gridSize().isEmpty())
 190         {
 191             retRect.setTop(retRect.top() +
 192                            (rowsInt * listView->spacing()));
 193         }
 194     }
 195
 196     if (listView->gridSize().isEmpty())
 197     {
 198         retRect.setTop(retRect.top() + row * listView->spacing() +
 199                        (row * itemHeight));
 200     }
 201     else
 202     {
 203         retRect.setTop(retRect.top() + (row * itemHeight));
 204     }
 205
 206     retRect.setWidth(itemWidth);
 207
 208     QModelIndex heightIndex = proxyModel->index(index.row(), 0);
 209     if (listView->gridSize().isEmpty())
 210     {
 211         retRect.setHeight(listView->sizeHintForIndex(heightIndex).height());
 212     }
 213     else
 214     {
 215         retRect.setHeight(qMin(listView->sizeHintForIndex(heightIndex).height(),
 216                                listView->gridSize().height()));
 217     }
 218
 219     return retRect;
 220 }
 221
 222 QRect KCategorizedView::Private::visualCategoryRectInViewport(const QString &category)
 223                                                                            const
 224 {
 225     QRect retRect(listView->spacing(),
 226                   listView->spacing(),
 227                   listView->viewport()->width() - listView->spacing() * 2,
 228                   0);
 229
 230     if (!proxyModel->rowCount() || !categories.contains(category))
 231         return QRect();
 232
 233     QModelIndex index = proxyModel->index(0, 0, QModelIndex());
 234
 235     int viewportWidth = listView->viewport()->width() - listView->spacing();
 236
 237     int itemHeight;
 238     int itemWidth;
 239
 240     if (listView->gridSize().isEmpty())
 241     {
 242         itemHeight = biggestItemSize.height();
 243         itemWidth = biggestItemSize.width();
 244     }
 245     else
 246     {
 247         itemHeight = listView->gridSize().height();
 248         itemWidth = listView->gridSize().width();
 249     }
 250
 251     int itemWidthPlusSeparation = listView->spacing() + itemWidth;
 252     int elementsPerRow = viewportWidth / itemWidthPlusSeparation;
 253
 254     if (!elementsPerRow)
 255         elementsPerRow++;
 256
 257     foreach (const QString &itCategory, categories)
 258     {
 259         if (itCategory == category)
 260             break;
 261
 262         float rows = (float) ((float) categoriesIndexes[itCategory].count() /
 263                               (float) elementsPerRow);
 264         int rowsInt = categoriesIndexes[itCategory].count() / elementsPerRow;
 265
 266         if (rows - trunc(rows)) rowsInt++;
 267
 268         retRect.setTop(retRect.top() +
 269                        (rowsInt * itemHeight) +
 270                        categoryDrawer->categoryHeight(listView->viewOptions()) +
 271                        listView->spacing() * 2);
 272
 273         if (listView->gridSize().isEmpty())
 274         {
 275             retRect.setTop(retRect.top() +
 276                            (rowsInt * listView->spacing()));
 277         }
 278     }
 279
 280     retRect.setHeight(categoryDrawer->categoryHeight(listView->viewOptions()));
 281
 282     return retRect;
 283 }
 284
 285 // We're sure elementsPosition doesn't contain index
 286 const QRect &KCategorizedView::Private::cacheIndex(const QModelIndex &index)
 287 {
 288     QRect rect = visualRectInViewport(index);
 289     elementsPosition[index.row()] = rect;
 290
 291     return elementsPosition[index.row()];
 292 }
 293
 294 // We're sure categoriesPosition doesn't contain category
 295 const QRect &KCategorizedView::Private::cacheCategory(const QString &category)
 296 {
 297     QRect rect = visualCategoryRectInViewport(category);
 298     categoriesPosition[category] = rect;
 299
 300     return categoriesPosition[category];
 301 }
 302
 303 const QRect &KCategorizedView::Private::cachedRectIndex(const QModelIndex &index)
 304 {
 305     if (elementsPosition.contains(index.row())) // If we have it cached
 306     {                                        // return it
 307         return elementsPosition[index.row()];
 308     }
 309     else                                     // Otherwise, cache it
 310     {                                        // and return it
 311         return cacheIndex(index);
 312     }
 313 }
 314
 315 const QRect &KCategorizedView::Private::cachedRectCategory(const QString &category)
 316 {
 317     if (categoriesPosition.contains(category)) // If we have it cached
 318     {                                                // return it
 319         return categoriesPosition[category];
 320     }
 321     else                                            // Otherwise, cache it and
 322     {                                               // return it
 323         return cacheCategory(category);
 324     }
 325 }
 326
 327 QRect KCategorizedView::Private::visualRect(const QModelIndex &index)
 328 {
 329     QRect retRect = cachedRectIndex(index);
 330     int dx = -listView->horizontalOffset();
 331     int dy = -listView->verticalOffset();
 332     retRect.adjust(dx, dy, dx, dy);
 333
 334     return retRect;
 335 }
 336
 337 QRect KCategorizedView::Private::categoryVisualRect(const QString &category)
 338 {
 339     QRect retRect = cachedRectCategory(category);
 340     int dx = -listView->horizontalOffset();
 341     int dy = -listView->verticalOffset();
 342     retRect.adjust(dx, dy, dx, dy);
 343
 344     return retRect;
 345 }
 346
 347 void KCategorizedView::Private::drawNewCategory(const QModelIndex &index,
 348                                                 int sortRole,
 349                                                 const QStyleOption &option,
 350                                                 QPainter *painter)
 351 {
 352     if (!index.isValid())
 353     {
 354         return;
 355     }
 356
 357     QStyleOption optionCopy = option;
 358     const QString category = proxyModel->data(index, KCategorizedSortFilterProxyModel::CategoryRole).toString();
 359
 360     optionCopy.state &= ~QStyle::State_Selected;
 361
 362     if ((category == hoveredCategory) && !mouseButtonPressed)
 363     {
 364         optionCopy.state |= QStyle::State_MouseOver;
 365     }
 366     else if ((category == hoveredCategory) && mouseButtonPressed)
 367     {
 368         QPoint initialPressPosition = listView->viewport()->mapFromGlobal(QCursor::pos());
 369         initialPressPosition.setY(initialPressPosition.y() + listView->verticalOffset());
 370         initialPressPosition.setX(initialPressPosition.x() + listView->horizontalOffset());
 371
 372         if (initialPressPosition == this->initialPressPosition)
 373         {
 374             optionCopy.state |= QStyle::State_Selected;
 375         }
 376     }
 377
 378     categoryDrawer->drawCategory(index,
 379                                  sortRole,
 380                                  optionCopy,
 381                                  painter);
 382 }
 383
 384
 385 void KCategorizedView::Private::updateScrollbars()
 386 {
 387     // find the last index in the last category
 388     QModelIndex lastIndex = categoriesIndexes.isEmpty() ? QModelIndex() : categoriesIndexes[categories.last()].last();
 389
 390     int lastItemBottom = cachedRectIndex(lastIndex).top() +
 391                          listView->spacing() + (listView->gridSize().isEmpty() ? 0 : listView->gridSize().height()) - listView->viewport()->height();
 392
 393     listView->verticalScrollBar()->setSingleStep(listView->viewport()->height() / 10);
 394     listView->verticalScrollBar()->setPageStep(listView->viewport()->height());
 395     listView->verticalScrollBar()->setRange(0, lastItemBottom);
 396 }
 397
 398 void KCategorizedView::Private::drawDraggedItems(QPainter *painter)
 399 {
 400     QStyleOptionViewItemV3 option = listView->viewOptions();
 401     option.state &= ~QStyle::State_MouseOver;
 402     foreach (const QModelIndex &index, listView->selectionModel()->selectedIndexes())
 403     {
 404         const int dx = mousePosition.x() - initialPressPosition.x() + listView->horizontalOffset();
 405         const int dy = mousePosition.y() - initialPressPosition.y() + listView->verticalOffset();
 406
 407         option.rect = visualRect(index);
 408         option.rect.adjust(dx, dy, dx, dy);
 409
 410         if (option.rect.intersects(listView->viewport()->rect()))
 411         {
 412             listView->itemDelegate(index)->paint(painter, option, index);
 413         }
 414     }
 415 }
 416
 417 void KCategorizedView::Private::drawDraggedItems()
 418 {
 419     QRect rectToUpdate;
 420     QRect currentRect;
 421     foreach (const QModelIndex &index, listView->selectionModel()->selectedIndexes())
 422     {
 423         int dx = mousePosition.x() - initialPressPosition.x() + listView->horizontalOffset();
 424         int dy = mousePosition.y() - initialPressPosition.y() + listView->verticalOffset();
 425
 426         currentRect = visualRect(index);
 427         currentRect.adjust(dx, dy, dx, dy);
 428
 429         if (currentRect.intersects(listView->viewport()->rect()))
 430         {
 431             rectToUpdate = rectToUpdate.united(currentRect);
 432         }
 433     }
 434
 435     listView->viewport()->update(lastDraggedItemsRect.united(rectToUpdate));
 436
 437     lastDraggedItemsRect = rectToUpdate;
 438 }
 439
 440
 441 //==============================================================================
 442
 443
 444 KCategorizedView::KCategorizedView(QWidget *parent)
 445     : QListView(parent)
 446     , d(new Private(this))
 447 {
 448 }
 449
 450 KCategorizedView::~KCategorizedView()
 451 {
 452     delete d;
 453 }
 454
 455 void KCategorizedView::setGridSize(const QSize &size)
 456 {
 457     QListView::setGridSize(size);
 458
 459     slotLayoutChanged();
 460 }
 461
 462 void KCategorizedView::setModel(QAbstractItemModel *model)
 463 {
 464     d->lastSelection = QItemSelection();
 465     d->currentViewIndex = QModelIndex();
 466     d->forcedSelectionPosition = 0;
 467     d->elementsInfo.clear();
 468     d->elementsPosition.clear();
 469     d->categoriesIndexes.clear();
 470     d->categoriesPosition.clear();
 471     d->categories.clear();
 472     d->intersectedIndexes.clear();
 473     d->modelIndexList.clear();
 474     d->hovered = QModelIndex();
 475     d->mouseButtonPressed = false;
 476
 477     if (d->proxyModel)
 478     {
 479         QObject::disconnect(d->proxyModel,
 480                             SIGNAL(layoutAboutToBeChanged()),
 481                             this, SLOT(slotLayoutAboutToBeChanged()));
 482
 483         QObject::disconnect(d->proxyModel,
 484                             SIGNAL(layoutChanged()),
 485                             this, SLOT(slotLayoutChanged()));
 486
 487         QObject::disconnect(d->proxyModel,
 488                             SIGNAL(dataChanged(QModelIndex,QModelIndex)),
 489                             this, SLOT(slotLayoutChanged()));
 490     }
 491
 492     QListView::setModel(model);
 493
 494     d->proxyModel = dynamic_cast<KCategorizedSortFilterProxyModel*>(model);
 495
 496     if (d->proxyModel)
 497     {
 498         d->modelSortRole = d->proxyModel->sortRole();
 499         d->modelSortColumn = d->proxyModel->sortColumn();
 500         d->modelSortOrder = d->proxyModel->sortOrder();
 501
 502         QObject::connect(d->proxyModel,
 503                          SIGNAL(layoutAboutToBeChanged()),
 504                          this, SLOT(slotLayoutAboutToBeChanged()));
 505
 506         QObject::connect(d->proxyModel,
 507                          SIGNAL(layoutChanged()),
 508                          this, SLOT(slotLayoutChanged()));
 509
 510         QObject::connect(d->proxyModel,
 511                          SIGNAL(dataChanged(QModelIndex,QModelIndex)),
 512                          this, SLOT(slotLayoutChanged()));
 513     }
 514 }
 515
 516 QRect KCategorizedView::visualRect(const QModelIndex &index) const
 517 {
 518     if ((viewMode() != KCategorizedView::IconMode) || !d->proxyModel ||
 519         !d->categoryDrawer || !d->proxyModel->isCategorizedModel())
 520     {
 521         return QListView::visualRect(index);
 522     }
 523
 524     if (!qobject_cast<const QSortFilterProxyModel*>(index.model()))
 525     {
 526         return d->visualRect(d->proxyModel->mapFromSource(index));
 527     }
 528
 529     return d->visualRect(index);
 530 }
 531
 532 KCategoryDrawer *KCategorizedView::categoryDrawer() const
 533 {
 534     return d->categoryDrawer;
 535 }
 536
 537 void KCategorizedView::setCategoryDrawer(KCategoryDrawer *categoryDrawer)
 538 {
 539     d->lastSelection = QItemSelection();
 540     d->currentViewIndex = QModelIndex();
 541     d->forcedSelectionPosition = 0;
 542     d->elementsInfo.clear();
 543     d->elementsPosition.clear();
 544     d->categoriesIndexes.clear();
 545     d->categoriesPosition.clear();
 546     d->categories.clear();
 547     d->intersectedIndexes.clear();
 548     d->modelIndexList.clear();
 549     d->hovered = QModelIndex();
 550     d->mouseButtonPressed = false;
 551
 552     if (!categoryDrawer && d->proxyModel)
 553     {
 554         QObject::disconnect(d->proxyModel,
 555                             SIGNAL(layoutAboutToBeChanged()),
 556                             this, SLOT(slotLayoutAboutToBeChanged()));
 557
 558         QObject::disconnect(d->proxyModel,
 559                             SIGNAL(layoutChanged()),
 560                             this, SLOT(slotLayoutChanged()));
 561
 562         QObject::disconnect(d->proxyModel,
 563                             SIGNAL(dataChanged(QModelIndex,QModelIndex)),
 564                             this, SLOT(slotLayoutChanged()));
 565     }
 566     else if (categoryDrawer && d->proxyModel)
 567     {
 568         QObject::connect(d->proxyModel,
 569                          SIGNAL(layoutAboutToBeChanged()),
 570                          this, SLOT(slotLayoutAboutToBeChanged()));
 571
 572         QObject::connect(d->proxyModel,
 573                          SIGNAL(layoutChanged()),
 574                          this, SLOT(slotLayoutChanged()));
 575
 576         QObject::connect(d->proxyModel,
 577                          SIGNAL(dataChanged(QModelIndex,QModelIndex)),
 578                          this, SLOT(slotLayoutChanged()));
 579     }
 580
 581     d->categoryDrawer = categoryDrawer;
 582
 583     if (categoryDrawer)
 584     {
 585         if (d->proxyModel)
 586         {
 587             rowsInserted(QModelIndex(), 0, d->proxyModel->rowCount() - 1);
 588         }
 589     }
 590     else
 591     {
 592         updateGeometries();
 593     }
 594 }
 595
 596 QModelIndex KCategorizedView::indexAt(const QPoint &point) const
 597 {
 598     if ((viewMode() != KCategorizedView::IconMode) || !d->proxyModel ||
 599         !d->categoryDrawer || !d->proxyModel->isCategorizedModel())
 600     {
 601         return QListView::indexAt(point);
 602     }
 603
 604     QModelIndex index;
 605
 606     QModelIndexList item = d->intersectionSet(QRect(point, point));
 607
 608     if (item.count() == 1)
 609     {
 610         index = item[0];
 611     }
 612
 613     d->hovered = index;
 614
 615     return index;
 616 }
 617
 618 void KCategorizedView::reset()
 619 {
 620     QListView::reset();
 621
 622     d->lastSelection = QItemSelection();
 623     d->currentViewIndex = QModelIndex();
 624     d->forcedSelectionPosition = 0;
 625     d->elementsInfo.clear();
 626     d->elementsPosition.clear();
 627     d->categoriesIndexes.clear();
 628     d->categoriesPosition.clear();
 629     d->categories.clear();
 630     d->intersectedIndexes.clear();
 631     d->modelIndexList.clear();
 632     d->hovered = QModelIndex();
 633     d->biggestItemSize = QSize(0, 0);
 634     d->mouseButtonPressed = false;
 635 }
 636
 637 void KCategorizedView::paintEvent(QPaintEvent *event)
 638 {
 639     if ((viewMode() != KCategorizedView::IconMode) || !d->proxyModel ||
 640         !d->categoryDrawer || !d->proxyModel->isCategorizedModel())
 641     {
 642         QListView::paintEvent(event);
 643         return;
 644     }
 645
 646     QStyleOptionViewItemV3 option = viewOptions();
 647     option.widget = this;
 648     if (wordWrap())
 649     {
 650         option.features |= QStyleOptionViewItemV2::WrapText;
 651     }
 652
 653     QPainter painter(viewport());
 654     QRect area = event->rect();
 655     const bool focus = (hasFocus() || viewport()->hasFocus()) &&
 656                         currentIndex().isValid();
 657     const QStyle::State state = option.state;
 658     const bool enabled = (state & QStyle::State_Enabled) != 0;
 659
 660     painter.save();
 661
 662     QModelIndexList dirtyIndexes = d->intersectionSet(area);
 663     foreach (const QModelIndex &index, dirtyIndexes)
 664     {
 665         option.state = state;
 666         option.rect = visualRect(index);
 667
 668         if (selectionModel() && selectionModel()->isSelected(index))
 669         {
 670             option.state |= QStyle::State_Selected;
 671         }
 672
 673         if (enabled)
 674         {
 675             QPalette::ColorGroup cg;
 676             if ((d->proxyModel->flags(index) & Qt::ItemIsEnabled) == 0)
 677             {
 678                 option.state &= ~QStyle::State_Enabled;
 679                 cg = QPalette::Disabled;
 680             }
 681             else
 682             {
 683                 cg = QPalette::Normal;
 684             }
 685             option.palette.setCurrentColorGroup(cg);
 686         }
 687
 688         if (focus && currentIndex() == index)
 689         {
 690             option.state |= QStyle::State_HasFocus;
 691             if (this->state() == EditingState)
 692                 option.state |= QStyle::State_Editing;
 693         }
 694
 695         if ((index == d->hovered) && !d->mouseButtonPressed)
 696             option.state |= QStyle::State_MouseOver;
 697         else
 698             option.state &= ~QStyle::State_MouseOver;
 699
 700         itemDelegate(index)->paint(&painter, option, index);
 701     }
 702
 703     // Redraw categories
 704     QStyleOptionViewItem otherOption;
 705     foreach (const QString &category, d->categories)
 706     {
 707         otherOption = option;
 708         otherOption.rect = d->categoryVisualRect(category);
 709         otherOption.state &= ~QStyle::State_MouseOver;
 710
 711         if (otherOption.rect.intersects(area))
 712         {
 713             QModelIndex indexToDraw = d->proxyModel->index(d->categoriesIndexes[category][0].row(), d->proxyModel->sortColumn());
 714
 715             d->drawNewCategory(indexToDraw,
 716                                d->proxyModel->sortRole(), otherOption, &painter);
 717         }
 718     }
 719
 720     if (d->mouseButtonPressed && !d->isDragging)
 721     {
 722         QPoint start, end, initialPressPosition;
 723
 724         initialPressPosition = d->initialPressPosition;
 725
 726         initialPressPosition.setY(initialPressPosition.y() - verticalOffset());
 727         initialPressPosition.setX(initialPressPosition.x() - horizontalOffset());
 728
 729         if (d->initialPressPosition.x() > d->mousePosition.x() ||
 730             d->initialPressPosition.y() > d->mousePosition.y())
 731         {
 732             start = d->mousePosition;
 733             end = initialPressPosition;
 734         }
 735         else
 736         {
 737             start = initialPressPosition;
 738             end = d->mousePosition;
 739         }
 740
 741         QStyleOptionRubberBand yetAnotherOption;
 742         yetAnotherOption.initFrom(this);
 743         yetAnotherOption.shape = QRubberBand::Rectangle;
 744         yetAnotherOption.opaque = false;
 745         yetAnotherOption.rect = QRect(start, end).intersected(viewport()->rect().adjusted(-16, -16, 16, 16));
 746         painter.save();
 747         style()->drawControl(QStyle::CE_RubberBand, &yetAnotherOption, &painter);
 748         painter.restore();
 749     }
 750
 751     if (d->isDragging && !d->dragLeftViewport)
 752     {
 753         painter.setOpacity(0.5);
 754         d->drawDraggedItems(&painter);
 755     }
 756
 757     painter.restore();
 758 }
 759
 760 void KCategorizedView::resizeEvent(QResizeEvent *event)
 761 {
 762     QListView::resizeEvent(event);
 763
 764     // Clear the items positions cache
 765     d->elementsPosition.clear();
 766     d->categoriesPosition.clear();
 767     d->forcedSelectionPosition = 0;
 768
 769     if ((viewMode() != KCategorizedView::IconMode) || !d->proxyModel ||
 770         !d->categoryDrawer || !d->proxyModel->isCategorizedModel())
 771     {
 772         return;
 773     }
 774
 775     d->updateScrollbars();
 776 }
 777
 778 void KCategorizedView::setSelection(const QRect &rect,
 779                                     QItemSelectionModel::SelectionFlags flags)
 780 {
 781     if ((viewMode() != KCategorizedView::IconMode) || !d->proxyModel ||
 782         !d->categoryDrawer || !d->proxyModel->isCategorizedModel())
 783     {
 784         QListView::setSelection(rect, flags);
 785         return;
 786     }
 787
 788     if (!flags)
 789         return;
 790
 791     if (flags & QItemSelectionModel::Clear)
 792     {
 793         if (!rect.intersects(d->categoryVisualRect(d->hoveredCategory)))
 794         {
 795             d->lastSelection = QItemSelection();
 796         }
 797     }
 798
 799     selectionModel()->clear();
 800
 801     QModelIndexList dirtyIndexes = d->intersectionSet(rect);
 802
 803     if (!dirtyIndexes.count())
 804     {
 805         if (!d->lastSelection.isEmpty() &&
 806             (rect.intersects(d->categoryVisualRect(d->hoveredCategory)) || d->mouseButtonPressed))
 807         {
 808             selectionModel()->select(d->lastSelection, flags);
 809         }
 810
 811         return;
 812     }
 813
 814     QItemSelection selection;
 815
 816     if (!d->mouseButtonPressed)
 817     {
 818         selection = QItemSelection(dirtyIndexes[0], dirtyIndexes[0]);
 819         d->currentViewIndex = dirtyIndexes[0];
 820     }
 821     else
 822     {
 823         QModelIndex first = dirtyIndexes[0];
 824         QModelIndex last;
 825         foreach (const QModelIndex &index, dirtyIndexes)
 826         {
 827             if (last.isValid() && last.row() + 1 != index.row())
 828             {
 829                 QItemSelectionRange range(first, last);
 830
 831                 selection << range;
 832
 833                 first = index;
 834             }
 835
 836             last = index;
 837         }
 838
 839         if (last.isValid())
 840             selection << QItemSelectionRange(first, last);
 841     }
 842
 843     if (d->lastSelection.count())
 844     {
 845         if ((selection.count() == 1) && (selection[0].indexes().count() == 1))
 846             selection.merge(d->lastSelection, flags);
 847         else
 848             selection.merge(d->lastSelection, QItemSelectionModel::Select);
 849     }
 850
 851     selectionModel()->select(selection, flags);
 852 }
 853
 854 void KCategorizedView::mouseMoveEvent(QMouseEvent *event)
 855 {
 856     QListView::mouseMoveEvent(event);
 857
 858     if ((viewMode() != KCategorizedView::IconMode) || !d->proxyModel ||
 859         !d->categoryDrawer || !d->proxyModel->isCategorizedModel())
 860     {
 861         return;
 862     }
 863
 864     const QString previousHoveredCategory = d->hoveredCategory;
 865
 866     d->mousePosition = event->pos();
 867     d->hoveredCategory = QString();
 868
 869     // Redraw categories
 870     foreach (const QString &category, d->categories)
 871     {
 872         if (d->categoryVisualRect(category).intersects(QRect(event->pos(), event->pos())))
 873         {
 874             d->hoveredCategory = category;
 875             viewport()->update(d->categoryVisualRect(category));
 876         }
 877         else if ((category == previousHoveredCategory) &&
 878                  (!d->categoryVisualRect(previousHoveredCategory).intersects(QRect(event->pos(), event->pos()))))
 879         {
 880             viewport()->update(d->categoryVisualRect(category));
 881         }
 882     }
 883
 884     QRect rect;
 885     if (d->mouseButtonPressed && !d->isDragging)
 886     {
 887         QPoint start, end, initialPressPosition;
 888
 889         initialPressPosition = d->initialPressPosition;
 890
 891         initialPressPosition.setY(initialPressPosition.y() - verticalOffset());
 892         initialPressPosition.setX(initialPressPosition.x() - horizontalOffset());
 893
 894         if (d->initialPressPosition.x() > d->mousePosition.x() ||
 895             d->initialPressPosition.y() > d->mousePosition.y())
 896         {
 897             start = d->mousePosition;
 898             end = initialPressPosition;
 899         }
 900         else
 901         {
 902             start = initialPressPosition;
 903             end = d->mousePosition;
 904         }
 905
 906         rect = QRect(start, end).intersected(viewport()->rect().adjusted(-16, -16, 16, 16));
 907
 908         //viewport()->update(rect.united(d->lastSelectionRect));
 909
 910         d->lastSelectionRect = rect;
 911     }
 912 }
 913
 914 void KCategorizedView::mousePressEvent(QMouseEvent *event)
 915 {
 916     d->dragLeftViewport = false;
 917
 918     if (event->button() == Qt::LeftButton)
 919     {
 920         d->mouseButtonPressed = true;
 921
 922         d->initialPressPosition = event->pos();
 923         d->initialPressPosition.setY(d->initialPressPosition.y() +
 924                                                               verticalOffset());
 925         d->initialPressPosition.setX(d->initialPressPosition.x() +
 926                                                             horizontalOffset());
 927     }
 928
 929     QListView::mousePressEvent(event);
 930
 931     viewport()->update(d->categoryVisualRect(d->hoveredCategory));
 932 }
 933
 934 void KCategorizedView::mouseReleaseEvent(QMouseEvent *event)
 935 {
 936     d->mouseButtonPressed = false;
 937
 938     QListView::mouseReleaseEvent(event);
 939
 940     if ((viewMode() != KCategorizedView::IconMode) || !d->proxyModel ||
 941         !d->categoryDrawer || !d->proxyModel->isCategorizedModel())
 942     {
 943         return;
 944     }
 945
 946     QPoint initialPressPosition = viewport()->mapFromGlobal(QCursor::pos());
 947     initialPressPosition.setY(initialPressPosition.y() + verticalOffset());
 948     initialPressPosition.setX(initialPressPosition.x() + horizontalOffset());
 949
 950     QItemSelection selection;
 951     QItemSelection deselection;
 952
 953     if (initialPressPosition == d->initialPressPosition)
 954     {
 955         foreach(const QString &category, d->categories)
 956         {
 957             if (d->categoryVisualRect(category).contains(event->pos()))
 958             {
 959                 foreach (const QModelIndex &index, d->categoriesIndexes[category])
 960                 {
 961                     QModelIndex selectIndex = index.model()->index(index.row(), 0);
 962
 963                     if (!d->lastSelection.contains(selectIndex))
 964                     {
 965                         selection << QItemSelectionRange(selectIndex);
 966                     }
 967                     else
 968                     {
 969                         deselection << QItemSelectionRange(selectIndex);
 970                     }
 971                 }
 972
 973                 selectionModel()->select(selection, QItemSelectionModel::Select);
 974                 selectionModel()->select(deselection, QItemSelectionModel::Deselect);
 975
 976                 break;
 977             }
 978         }
 979     }
 980
 981     d->lastSelection = selectionModel()->selection();
 982
 983     if (d->hovered.isValid())
 984         viewport()->update(visualRect(d->hovered));
 985     else if (!d->hoveredCategory.isEmpty())
 986         viewport()->update(d->categoryVisualRect(d->hoveredCategory));
 987 }
 988
 989 void KCategorizedView::leaveEvent(QEvent *event)
 990 {
 991     d->hovered = QModelIndex();
 992     d->hoveredCategory = QString();
 993
 994     QListView::leaveEvent(event);
 995 }
 996
 997 void KCategorizedView::startDrag(Qt::DropActions supportedActions)
 998 {
 999     // FIXME: QAbstractItemView does far better here since it sets the
1000     //        pixmap of selected icons to the dragging cursor, but it sets a non
1001     //        ARGB window so it is no transparent. Use QAbstractItemView when
1002     //        this is fixed on Qt.
1003     // QAbstractItemView::startDrag(supportedActions);
1004     QListView::startDrag(supportedActions);
1005
1006     d->isDragging = false;
1007     d->mouseButtonPressed = false;
1008
1009     viewport()->update(d->lastDraggedItemsRect);
1010 }
1011
1012 void KCategorizedView::dragMoveEvent(QDragMoveEvent *event)
1013 {
1014     d->mousePosition = event->pos();
1015
1016     if (d->mouseButtonPressed)
1017     {
1018         d->isDragging = true;
1019     }
1020     else
1021     {
1022         d->isDragging = false;
1023     }
1024
1025     d->dragLeftViewport = false;
1026
1027     if ((viewMode() != KCategorizedView::IconMode) || !d->proxyModel ||
1028         !d->categoryDrawer || !d->proxyModel->isCategorizedModel())
1029     {
1030         QListView::dragMoveEvent(event);
1031         return;
1032     }
1033
1034     d->drawDraggedItems();
1035 }
1036
1037 void KCategorizedView::dragLeaveEvent(QDragLeaveEvent *event)
1038 {
1039     d->dragLeftViewport = true;
1040
1041     QListView::dragLeaveEvent(event);
1042 }
1043
1044 QModelIndex KCategorizedView::moveCursor(CursorAction cursorAction,
1045                                          Qt::KeyboardModifiers modifiers)
1046 {
1047     if ((viewMode() != KCategorizedView::IconMode) ||
1048          !d->proxyModel ||
1049          !d->categoryDrawer ||
1050           d->categories.isEmpty() ||
1051          !d->proxyModel->isCategorizedModel()
1052        )
1053     {
1054         return QListView::moveCursor(cursorAction, modifiers);
1055     }
1056
1057     const QModelIndex current = selectionModel()->currentIndex();
1058
1059     int viewportWidth = viewport()->width() - spacing();
1060     int itemWidth;
1061
1062     if (gridSize().isEmpty())
1063     {
1064         itemWidth = d->biggestItemSize.width();
1065     }
1066     else
1067     {
1068         itemWidth = gridSize().width();
1069     }
1070
1071     int itemWidthPlusSeparation = spacing() + itemWidth;
1072     int elementsPerRow = viewportWidth / itemWidthPlusSeparation;
1073
1074     QString lastCategory = d->categories.first();
1075     QString theCategory = d->categories.first();
1076     QString afterCategory = d->categories.first();
1077
1078     bool hasToBreak = false;
1079     foreach (const QString &category, d->categories)
1080     {
1081         if (hasToBreak)
1082         {
1083             afterCategory = category;
1084
1085             break;
1086         }
1087
1088         if (category == d->elementsInfo[current.row()].category)
1089         {
1090             theCategory = category;
1091
1092             hasToBreak = true;
1093         }
1094
1095         if (!hasToBreak)
1096         {
1097             lastCategory = category;
1098         }
1099     }
1100
1101     switch (cursorAction)
1102     {
1103         case QAbstractItemView::MoveUp: {
1104             if (d->elementsInfo[current.row()].relativeOffsetToCategory >= elementsPerRow)
1105             {
1106                 int indexToMove = current.row();
1107                 indexToMove -= qMin(((d->elementsInfo[current.row()].relativeOffsetToCategory) + d->forcedSelectionPosition), elementsPerRow - d->forcedSelectionPosition + (d->elementsInfo[current.row()].relativeOffsetToCategory % elementsPerRow));
1108
1109                 return d->proxyModel->index(indexToMove, 0);
1110             }
1111             else
1112             {
1113                 int lastCategoryLastRow = (d->categoriesIndexes[lastCategory].count() - 1) % elementsPerRow;
1114                 int indexToMove = current.row() - d->elementsInfo[current.row()].relativeOffsetToCategory;
1115
1116                 if (d->forcedSelectionPosition >= lastCategoryLastRow)
1117                 {
1118                     indexToMove -= 1;
1119                 }
1120                 else
1121                 {
1122                     indexToMove -= qMin((lastCategoryLastRow - d->forcedSelectionPosition + 1), d->forcedSelectionPosition + elementsPerRow + 1);
1123                 }
1124
1125                 return d->proxyModel->index(indexToMove, 0);
1126             }
1127         }
1128
1129         case QAbstractItemView::MoveDown: {
1130             if (d->elementsInfo[current.row()].relativeOffsetToCategory < (d->categoriesIndexes[theCategory].count() - 1 - ((d->categoriesIndexes[theCategory].count() - 1) % elementsPerRow)))
1131             {
1132                 int indexToMove = current.row();
1133                 indexToMove += qMin(elementsPerRow, d->categoriesIndexes[theCategory].count() - 1 - d->elementsInfo[current.row()].relativeOffsetToCategory);
1134
1135                 return d->proxyModel->index(indexToMove, 0);
1136             }
1137             else
1138             {
1139                 int afterCategoryLastRow = qMin(elementsPerRow, d->categoriesIndexes[afterCategory].count());
1140                 int indexToMove = current.row() + (d->categoriesIndexes[theCategory].count() - d->elementsInfo[current.row()].relativeOffsetToCategory);
1141
1142                 if (d->forcedSelectionPosition >= afterCategoryLastRow)
1143                 {
1144                     indexToMove += afterCategoryLastRow - 1;
1145                 }
1146                 else
1147                 {
1148                     indexToMove += qMin(d->forcedSelectionPosition, elementsPerRow);
1149                 }
1150
1151                 return d->proxyModel->index(indexToMove, 0);
1152             }
1153         }
1154
1155         case QAbstractItemView::MoveLeft:
1156             if (layoutDirection() == Qt::RightToLeft)
1157             {
1158                 d->forcedSelectionPosition = d->elementsInfo[current.row() + 1].relativeOffsetToCategory % elementsPerRow;
1159
1160                 if (d->forcedSelectionPosition < 0)
1161                     d->forcedSelectionPosition = (d->categoriesIndexes[theCategory].count() - 1) % elementsPerRow;
1162
1163                 return d->proxyModel->index(current.row() + 1, 0);
1164             }
1165
1166             d->forcedSelectionPosition = d->elementsInfo[current.row() - 1].relativeOffsetToCategory % elementsPerRow;
1167
1168             if (d->forcedSelectionPosition < 0)
1169                 d->forcedSelectionPosition = (d->categoriesIndexes[theCategory].count() - 1) % elementsPerRow;
1170
1171             return d->proxyModel->index(current.row() - 1, 0);
1172
1173         case QAbstractItemView::MoveRight:
1174             if (layoutDirection() == Qt::RightToLeft)
1175             {
1176                 d->forcedSelectionPosition = d->elementsInfo[current.row() - 1].relativeOffsetToCategory % elementsPerRow;
1177
1178                 if (d->forcedSelectionPosition < 0)
1179                     d->forcedSelectionPosition = (d->categoriesIndexes[theCategory].count() - 1) % elementsPerRow;
1180
1181                 return d->proxyModel->index(current.row() - 1, 0);
1182             }
1183
1184             d->forcedSelectionPosition = d->elementsInfo[current.row() + 1].relativeOffsetToCategory % elementsPerRow;
1185
1186             if (d->forcedSelectionPosition < 0)
1187                 d->forcedSelectionPosition = (d->categoriesIndexes[theCategory].count() - 1) % elementsPerRow;
1188
1189             return d->proxyModel->index(current.row() + 1, 0);
1190
1191         default:
1192             break;
1193     }
1194
1195     return QListView::moveCursor(cursorAction, modifiers);
1196 }
1197
1198 void KCategorizedView::rowsInserted(const QModelIndex &parent,
1199                                     int start,
1200                                     int end)
1201 {
1202     QListView::rowsInserted(parent, start, end);
1203
1204     if ((viewMode() != KCategorizedView::IconMode) || !d->proxyModel ||
1205         !d->categoryDrawer || !d->proxyModel->isCategorizedModel())
1206     {
1207         d->lastSelection = QItemSelection();
1208         d->currentViewIndex = QModelIndex();
1209         d->forcedSelectionPosition = 0;
1210         d->elementsInfo.clear();
1211         d->elementsPosition.clear();
1212         d->categoriesIndexes.clear();
1213         d->categoriesPosition.clear();
1214         d->categories.clear();
1215         d->intersectedIndexes.clear();
1216         d->modelIndexList.clear();
1217         d->hovered = QModelIndex();
1218         d->biggestItemSize = QSize(0, 0);
1219         d->mouseButtonPressed = false;
1220
1221         return;
1222     }
1223
1224     rowsInsertedArtifficial(parent, start, end);
1225 }
1226
1227 void KCategorizedView::rowsInsertedArtifficial(const QModelIndex &parent,
1228                                         int start,
1229                                         int end)
1230 {
1231     Q_UNUSED(parent);
1232
1233     d->lastSelection = QItemSelection();
1234     d->currentViewIndex = QModelIndex();
1235     d->forcedSelectionPosition = 0;
1236     d->elementsInfo.clear();
1237     d->elementsPosition.clear();
1238     d->categoriesIndexes.clear();
1239     d->categoriesPosition.clear();
1240     d->categories.clear();
1241     d->intersectedIndexes.clear();
1242     d->modelIndexList.clear();
1243     d->hovered = QModelIndex();
1244     d->biggestItemSize = QSize(0, 0);
1245     d->mouseButtonPressed = false;
1246
1247     if (start > end || end < 0 || start < 0 || !d->proxyModel->rowCount())
1248     {
1249         return;
1250     }
1251
1252     // Add all elements mapped to the source model
1253     for (int k = 0; k < d->proxyModel->rowCount(); k++)
1254     {
1255         d->biggestItemSize = QSize(qMax(sizeHintForIndex(d->proxyModel->index(k, 0)).width(),
1256                                         d->biggestItemSize.width()),
1257                                    qMax(sizeHintForIndex(d->proxyModel->index(k, 0)).height(),
1258                                         d->biggestItemSize.height()));
1259
1260         d->modelIndexList << d->proxyModel->index(k, d->proxyModel->sortColumn());
1261     }
1262
1263     // Explore categories
1264     QString prevCategory = d->proxyModel->data(d->modelIndexList[0], KCategorizedSortFilterProxyModel::CategoryRole).toString();
1265     QString lastCategory = prevCategory;
1266     QModelIndexList modelIndexList;
1267     struct Private::ElementInfo elementInfo;
1268     int offset = -1;
1269     foreach (const QModelIndex &index, d->modelIndexList)
1270     {
1271         lastCategory = d->proxyModel->data(index, KCategorizedSortFilterProxyModel::CategoryRole).toString();
1272
1273         elementInfo.category = lastCategory;
1274
1275         if (prevCategory != lastCategory)
1276         {
1277             offset = 0;
1278             d->categoriesIndexes.insert(prevCategory, modelIndexList);
1279             d->categories << prevCategory;
1280             modelIndexList.clear();
1281         }
1282         else
1283         {
1284             offset++;
1285         }
1286
1287         elementInfo.relativeOffsetToCategory = offset;
1288
1289         modelIndexList << index;
1290         prevCategory = lastCategory;
1291
1292         d->elementsInfo.insert(index.row(), elementInfo);
1293     }
1294
1295     d->categoriesIndexes.insert(prevCategory, modelIndexList);
1296     d->categories << prevCategory;
1297
1298     d->updateScrollbars();
1299 }
1300
1301 void KCategorizedView::rowsRemoved(const QModelIndex &parent,
1302                             int start,
1303                             int end)
1304 {
1305     if ((viewMode() == KCategorizedView::IconMode) && d->proxyModel &&
1306         d->categoryDrawer && d->proxyModel->isCategorizedModel())
1307     {
1308         // Force the view to update all elements
1309         rowsInsertedArtifficial(parent, start, end);
1310     }
1311 }
1312
1313 void KCategorizedView::updateGeometries()
1314 {
1315     if ((viewMode() != KCategorizedView::IconMode) || !d->proxyModel ||
1316         !d->categoryDrawer || !d->proxyModel->isCategorizedModel())
1317     {
1318         QListView::updateGeometries();
1319         return;
1320     }
1321
1322     // Avoid QListView::updateGeometries(), since it will try to set another
1323     // range to our scroll bars, what we don't want (ereslibre)
1324     QAbstractItemView::updateGeometries();
1325 }
1326
1327 void KCategorizedView::slotLayoutAboutToBeChanged()
1328 {
1329     if ((viewMode() == KCategorizedView::IconMode) && d->proxyModel &&
1330         d->categoryDrawer && d->proxyModel->isCategorizedModel())
1331     {
1332         d->modelSortRole = d->proxyModel->sortRole();
1333         d->modelSortColumn = d->proxyModel->sortColumn();
1334         d->modelSortOrder = d->proxyModel->sortOrder();
1335     }
1336 }
1337
1338 void KCategorizedView::slotLayoutChanged()
1339 {
1340     if ((viewMode() == KCategorizedView::IconMode) && d->proxyModel &&
1341         d->categoryDrawer && d->proxyModel->isCategorizedModel() &&
1342         ((d->modelSortRole != d->proxyModel->sortRole()) ||
1343          (d->modelSortColumn != d->proxyModel->sortColumn()) ||
1344          (d->modelSortOrder != d->proxyModel->sortOrder())))
1345     {
1346         // Force the view to update all elements
1347         rowsInsertedArtifficial(QModelIndex(), 0, d->proxyModel->rowCount() - 1);
1348     }
1349 }
1350
1351 #include "kcategorizedview.moc"