src/kitemviews/kfileitemlistwidget.cpp

   1 /***************************************************************************
   2  *   Copyright (C) 2011 by Peter Penz <peter.penz19@gmail.com>             *
   3  *                                                                         *
   4  *   This program is free software; you can redistribute it and/or modify  *
   5  *   it under the terms of the GNU General Public License as published by  *
   6  *   the Free Software Foundation; either version 2 of the License, or     *
   7  *   (at your option) any later version.                                   *
   8  *                                                                         *
   9  *   This program is distributed in the hope that it will be useful,       *
  10  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  11  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  12  *   GNU General Public License for more details.                          *
  13  *                                                                         *
  14  *   You should have received a copy of the GNU General Public License     *
  15  *   along with this program; if not, write to the                         *
  16  *   Free Software Foundation, Inc.,                                       *
  17  *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA            *
  18  ***************************************************************************/
  19
  20 #include "kfileitemlistwidget.h"
  21
  22 #include "kfileitemclipboard_p.h"
  23 #include "kfileitemmodel.h"
  24 #include "kitemlistview.h"
  25 #include "kpixmapmodifier_p.h"
  26
  27 #include <KIcon>
  28 #include <KIconEffect>
  29 #include <KIconLoader>
  30 #include <KLocale>
  31 #include <KStringHandler>
  32 #include <KDebug>
  33
  34 #include <QFontMetricsF>
  35 #include <QGraphicsSceneResizeEvent>
  36 #include <QPainter>
  37 #include <QStyleOption>
  38 #include <QTextLayout>
  39 #include <QTextLine>
  40
  41 // #define KFILEITEMLISTWIDGET_DEBUG
  42
  43 KFileItemListWidget::KFileItemListWidget(QGraphicsItem* parent) :
  44     KItemListWidget(parent),
  45     m_isCut(false),
  46     m_isHidden(false),
  47     m_isExpandable(false),
  48     m_supportsItemExpanding(false),
  49     m_dirtyLayout(true),
  50     m_dirtyContent(true),
  51     m_dirtyContentRoles(),
  52     m_layout(IconsLayout),
  53     m_pixmapPos(),
  54     m_pixmap(),
  55     m_scaledPixmapSize(),
  56     m_iconRect(),
  57     m_hoverPixmap(),
  58     m_textPos(),
  59     m_text(),
  60     m_textRect(),
  61     m_sortedVisibleRoles(),
  62     m_expansionArea(),
  63     m_customTextColor(),
  64     m_additionalInfoTextColor(),
  65     m_overlay()
  66 {
  67     for (int i = 0; i < TextIdCount; ++i) {
  68         m_text[i].setTextFormat(Qt::PlainText);
  69         m_text[i].setPerformanceHint(QStaticText::AggressiveCaching);
  70     }
  71 }
  72
  73 KFileItemListWidget::~KFileItemListWidget()
  74 {
  75 }
  76
  77 void KFileItemListWidget::setLayout(Layout layout)
  78 {
  79     if (m_layout != layout) {
  80         m_layout = layout;
  81         m_dirtyLayout = true;
  82         updateAdditionalInfoTextColor();
  83         update();
  84     }
  85 }
  86
  87 KFileItemListWidget::Layout KFileItemListWidget::layout() const
  88 {
  89     return m_layout;
  90 }
  91
  92 void KFileItemListWidget::setSupportsItemExpanding(bool supportsItemExpanding)
  93 {
  94     if (m_supportsItemExpanding != supportsItemExpanding) {
  95         m_supportsItemExpanding = supportsItemExpanding;
  96         m_dirtyLayout = true;
  97         update();
  98     }
  99 }
 100
 101 bool KFileItemListWidget::supportsItemExpanding() const
 102 {
 103     return m_supportsItemExpanding;
 104 }
 105
 106 void KFileItemListWidget::paint(QPainter* painter, const QStyleOptionGraphicsItem* option, QWidget* widget)
 107 {
 108     const_cast<KFileItemListWidget*>(this)->triggerCacheRefreshing();
 109
 110     KItemListWidget::paint(painter, option, widget);
 111
 112     if (!m_expansionArea.isEmpty()) {
 113         drawSiblingsInformation(painter);
 114     }
 115
 116     const KItemListStyleOption& itemListStyleOption = styleOption();
 117     if (isHovered()) {
 118         // Blend the unhovered and hovered pixmap if the hovering
 119         // animation is ongoing
 120         if (hoverOpacity() < 1.0) {
 121             drawPixmap(painter, m_pixmap);
 122         }
 123
 124         const qreal opacity = painter->opacity();
 125         painter->setOpacity(hoverOpacity() * opacity);
 126         drawPixmap(painter, m_hoverPixmap);
 127         painter->setOpacity(opacity);
 128     } else {
 129         drawPixmap(painter, m_pixmap);
 130     }
 131
 132     painter->setFont(itemListStyleOption.font);
 133     painter->setPen(textColor());
 134     painter->drawStaticText(m_textPos[Name], m_text[Name]);
 135
 136     bool clipAdditionalInfoBounds = false;
 137     if (m_supportsItemExpanding) {
 138         // Prevent a possible overlapping of the additional-information texts
 139         // with the icon. This can happen if the user has minimized the width
 140         // of the name-column to a very small value.
 141         const qreal minX = m_pixmapPos.x() + m_pixmap.width() + 4 * itemListStyleOption.padding;
 142         if (m_textPos[Name].x() + columnWidth("name") > minX) {
 143             clipAdditionalInfoBounds = true;
 144             painter->save();
 145             painter->setClipRect(minX, 0, size().width() - minX, size().height(), Qt::IntersectClip);
 146         }
 147     }
 148
 149     painter->setPen(m_additionalInfoTextColor);
 150     painter->setFont(itemListStyleOption.font);
 151     for (int i = Name + 1; i < TextIdCount; ++i) {
 152         painter->drawStaticText(m_textPos[i], m_text[i]);
 153     }
 154
 155     if (clipAdditionalInfoBounds) {
 156         painter->restore();
 157     }
 158
 159 #ifdef KFILEITEMLISTWIDGET_DEBUG
 160     painter->setBrush(Qt::NoBrush);
 161     painter->setPen(Qt::green);
 162     painter->drawRect(m_iconRect);
 163
 164     painter->setPen(Qt::red);
 165     painter->drawText(QPointF(0, itemListStyleOption.fontMetrics.height()), QString::number(index()));
 166     painter->drawRect(rect());
 167 #endif
 168 }
 169
 170 QRectF KFileItemListWidget::iconRect() const
 171 {
 172     const_cast<KFileItemListWidget*>(this)->triggerCacheRefreshing();
 173     return m_iconRect;
 174 }
 175
 176 QRectF KFileItemListWidget::textRect() const
 177 {
 178     const_cast<KFileItemListWidget*>(this)->triggerCacheRefreshing();
 179     return m_textRect;
 180 }
 181
 182 QRectF KFileItemListWidget::expansionToggleRect() const
 183 {
 184     const_cast<KFileItemListWidget*>(this)->triggerCacheRefreshing();
 185     return m_isExpandable ? m_expansionArea : QRectF();
 186 }
 187
 188 QRectF KFileItemListWidget::selectionToggleRect() const
 189 {
 190     const_cast<KFileItemListWidget*>(this)->triggerCacheRefreshing();
 191
 192     const int iconHeight = styleOption().iconSize;
 193
 194     int toggleSize = KIconLoader::SizeSmall;
 195     if (iconHeight >= KIconLoader::SizeEnormous) {
 196         toggleSize = KIconLoader::SizeMedium;
 197     } else if (iconHeight >= KIconLoader::SizeLarge) {
 198         toggleSize = KIconLoader::SizeSmallMedium;
 199     }
 200
 201     QPointF pos = iconRect().topLeft();
 202
 203     // If the selection toggle has a very small distance to the
 204     // widget borders, the size of the selection toggle will get
 205     // increased to prevent an accidental clicking of the item
 206     // when trying to hit the toggle.
 207     const int widgetHeight = size().height();
 208     const int widgetWidth = size().width();
 209     const int minMargin = 2;
 210
 211     if (toggleSize + minMargin * 2 >= widgetHeight) {
 212         pos.rx() -= (widgetHeight - toggleSize) / 2;
 213         toggleSize = widgetHeight;
 214         pos.setY(0);
 215     }
 216     if (toggleSize + minMargin * 2 >= widgetWidth) {
 217         pos.ry() -= (widgetWidth - toggleSize) / 2;
 218         toggleSize = widgetWidth;
 219         pos.setX(0);
 220     }
 221
 222     return QRectF(pos, QSizeF(toggleSize, toggleSize));
 223 }
 224
 225 QString KFileItemListWidget::roleText(const QByteArray& role, const QHash<QByteArray, QVariant>& values)
 226 {
 227     QString text;
 228     const QVariant roleValue = values.value(role);
 229
 230     switch (roleTextId(role)) {
 231     case Name:
 232     case Permissions:
 233     case Owner:
 234     case Group:
 235     case Type:
 236     case Destination:
 237     case Path:
 238         text = roleValue.toString();
 239         break;
 240
 241     case Size: {
 242         if (values.value("isDir").toBool()) {
 243             // The item represents a directory. Show the number of sub directories
 244             // instead of the file size of the directory.
 245             if (!roleValue.isNull()) {
 246                 const int count = roleValue.toInt();
 247                 if (count < 0) {
 248                     text = i18nc("@item:intable", "Unknown");
 249                 } else {
 250                     text = i18ncp("@item:intable", "%1 item", "%1 items", count);
 251                 }
 252             }
 253         } else {
 254             // Show the size in kilobytes (always round up)
 255             const KLocale* locale = KGlobal::locale();
 256             const int roundInc = (locale->binaryUnitDialect() == KLocale::MetricBinaryDialect) ? 499 : 511;
 257             const KIO::filesize_t size = roleValue.value<KIO::filesize_t>() + roundInc;
 258             text = locale->formatByteSize(size, 0, KLocale::DefaultBinaryDialect, KLocale::UnitKiloByte);
 259         }
 260         break;
 261     }
 262
 263     case Date: {
 264         const QDateTime dateTime = roleValue.toDateTime();
 265         text = KGlobal::locale()->formatDateTime(dateTime);
 266         break;
 267     }
 268
 269     default:
 270         Q_ASSERT(false);
 271         break;
 272     }
 273
 274     return text;
 275 }
 276
 277 void KFileItemListWidget::invalidateCache()
 278 {
 279     m_dirtyLayout = true;
 280     m_dirtyContent = true;
 281 }
 282
 283 void KFileItemListWidget::refreshCache()
 284 {
 285 }
 286
 287 void KFileItemListWidget::setTextColor(const QColor& color)
 288 {
 289     if (color != m_customTextColor) {
 290         m_customTextColor = color;
 291         updateAdditionalInfoTextColor();
 292         update();
 293     }
 294 }
 295
 296 QColor KFileItemListWidget::textColor() const
 297 {
 298     if (m_customTextColor.isValid() && !isSelected()) {
 299         return m_customTextColor;
 300     }
 301
 302     const QPalette::ColorGroup group = isActiveWindow() ? QPalette::Active : QPalette::Inactive;
 303     const QPalette::ColorRole role = isSelected() ? QPalette::HighlightedText : QPalette::Text;
 304     return styleOption().palette.brush(group, role).color();
 305 }
 306
 307 void KFileItemListWidget::setOverlay(const QPixmap& overlay)
 308 {
 309     m_overlay = overlay;
 310     m_dirtyContent = true;
 311     update();
 312 }
 313
 314 QPixmap KFileItemListWidget::overlay() const
 315 {
 316     return m_overlay;
 317 }
 318
 319 void KFileItemListWidget::dataChanged(const QHash<QByteArray, QVariant>& current,
 320                                       const QSet<QByteArray>& roles)
 321 {
 322     Q_UNUSED(current);
 323
 324     m_dirtyContent = true;
 325
 326     QSet<QByteArray> dirtyRoles;
 327     if (roles.isEmpty()) {
 328         dirtyRoles = visibleRoles().toSet();
 329         dirtyRoles.insert("iconPixmap");
 330         dirtyRoles.insert("iconName");
 331     } else {
 332         dirtyRoles = roles;
 333     }
 334
 335     QSetIterator<QByteArray> it(dirtyRoles);
 336     while (it.hasNext()) {
 337         const QByteArray& role = it.next();
 338         m_dirtyContentRoles.insert(role);
 339     }
 340 }
 341
 342 void KFileItemListWidget::visibleRolesChanged(const QList<QByteArray>& current,
 343                                               const QList<QByteArray>& previous)
 344 {
 345     Q_UNUSED(previous);
 346     m_sortedVisibleRoles = current;
 347     m_dirtyLayout = true;
 348 }
 349
 350 void KFileItemListWidget::columnWidthChanged(const QByteArray& role,
 351                                              qreal current,
 352                                              qreal previous)
 353 {
 354     Q_UNUSED(role);
 355     Q_UNUSED(current);
 356     Q_UNUSED(previous);
 357     m_dirtyLayout = true;
 358 }
 359
 360 void KFileItemListWidget::styleOptionChanged(const KItemListStyleOption& current,
 361                                              const KItemListStyleOption& previous)
 362 {
 363     Q_UNUSED(current);
 364     Q_UNUSED(previous);
 365     updateAdditionalInfoTextColor();
 366     m_dirtyLayout = true;
 367 }
 368
 369 void KFileItemListWidget::hoveredChanged(bool hovered)
 370 {
 371     Q_UNUSED(hovered);
 372     m_dirtyLayout = true;
 373 }
 374
 375 void KFileItemListWidget::selectedChanged(bool selected)
 376 {
 377     Q_UNUSED(selected);
 378     updateAdditionalInfoTextColor();
 379 }
 380
 381 void KFileItemListWidget::siblingsInformationChanged(const QBitArray& current, const QBitArray& previous)
 382 {
 383     Q_UNUSED(current);
 384     Q_UNUSED(previous);
 385     m_dirtyLayout = true;
 386 }
 387
 388
 389 void KFileItemListWidget::resizeEvent(QGraphicsSceneResizeEvent* event)
 390 {
 391     KItemListWidget::resizeEvent(event);
 392     m_dirtyLayout = true;
 393 }
 394
 395 void KFileItemListWidget::showEvent(QShowEvent* event)
 396 {
 397     KItemListWidget::showEvent(event);
 398
 399     // Listen to changes of the clipboard to mark the item as cut/uncut
 400     KFileItemClipboard* clipboard = KFileItemClipboard::instance();
 401
 402     const KUrl itemUrl = data().value("url").value<KUrl>();
 403     m_isCut = clipboard->isCut(itemUrl);
 404
 405     connect(clipboard, SIGNAL(cutItemsChanged()),
 406             this, SLOT(slotCutItemsChanged()));
 407 }
 408
 409 void KFileItemListWidget::hideEvent(QHideEvent* event)
 410 {
 411     disconnect(KFileItemClipboard::instance(), SIGNAL(cutItemsChanged()),
 412                this, SLOT(slotCutItemsChanged()));
 413
 414     KItemListWidget::hideEvent(event);
 415 }
 416
 417 void KFileItemListWidget::slotCutItemsChanged()
 418 {
 419     const KUrl itemUrl = data().value("url").value<KUrl>();
 420     const bool isCut = KFileItemClipboard::instance()->isCut(itemUrl);
 421     if (m_isCut != isCut) {
 422         m_isCut = isCut;
 423         m_pixmap = QPixmap();
 424         m_dirtyContent = true;
 425         update();
 426     }
 427 }
 428
 429 void KFileItemListWidget::triggerCacheRefreshing()
 430 {
 431     if ((!m_dirtyContent && !m_dirtyLayout) || index() < 0) {
 432         return;
 433     }
 434
 435     refreshCache();
 436
 437     const QHash<QByteArray, QVariant> values = data();
 438     m_isExpandable = m_supportsItemExpanding && values["isExpandable"].toBool();
 439     m_isHidden = values["name"].toString().startsWith(QLatin1Char('.'));
 440
 441     updateExpansionArea();
 442     updateTextsCache();
 443     updatePixmapCache();
 444
 445     m_dirtyLayout = false;
 446     m_dirtyContent = false;
 447     m_dirtyContentRoles.clear();
 448 }
 449
 450 void KFileItemListWidget::updateExpansionArea()
 451 {
 452     if (m_supportsItemExpanding) {
 453         const QHash<QByteArray, QVariant> values = data();
 454         Q_ASSERT(values.contains("expandedParentsCount"));
 455         const int expandedParentsCount = values.value("expandedParentsCount", 0).toInt();
 456         if (expandedParentsCount >= 0) {
 457             const qreal widgetHeight = size().height();
 458             const qreal inc = (widgetHeight - KIconLoader::SizeSmall) / 2;
 459             const qreal x = expandedParentsCount * widgetHeight + inc;
 460             const qreal y = inc;
 461             m_expansionArea = QRectF(x, y, KIconLoader::SizeSmall, KIconLoader::SizeSmall);
 462             return;
 463         }
 464     }
 465
 466     m_expansionArea = QRectF();
 467 }
 468
 469 void KFileItemListWidget::updatePixmapCache()
 470 {
 471     // Precondition: Requires already updated m_textPos values to calculate
 472     // the remaining height when the alignment is vertical.
 473
 474     const QSizeF widgetSize = size();
 475     const bool iconOnTop = (m_layout == IconsLayout);
 476     const KItemListStyleOption& option = styleOption();
 477     const qreal padding = option.padding;
 478
 479     const int maxIconWidth = iconOnTop ? widgetSize.width() - 2 * padding : option.iconSize;
 480     const int maxIconHeight = option.iconSize;
 481
 482     const QHash<QByteArray, QVariant> values = data();
 483
 484     bool updatePixmap = (m_pixmap.width() != maxIconWidth || m_pixmap.height() != maxIconHeight);
 485     if (!updatePixmap && m_dirtyContent) {
 486         updatePixmap = m_dirtyContentRoles.isEmpty()
 487                        || m_dirtyContentRoles.contains("iconPixmap")
 488                        || m_dirtyContentRoles.contains("iconName")
 489                        || m_dirtyContentRoles.contains("iconOverlays");
 490     }
 491
 492     if (updatePixmap) {
 493         m_pixmap = values["iconPixmap"].value<QPixmap>();
 494         if (m_pixmap.isNull()) {
 495             // Use the icon that fits to the MIME-type
 496             QString iconName = values["iconName"].toString();
 497             if (iconName.isEmpty()) {
 498                 // The icon-name has not been not resolved by KFileItemModelRolesUpdater,
 499                 // use a generic icon as fallback
 500                 iconName = QLatin1String("unknown");
 501             }
 502             m_pixmap = pixmapForIcon(iconName, maxIconHeight);
 503         } else if (m_pixmap.width() != maxIconWidth || m_pixmap.height() != maxIconHeight) {
 504             // A custom pixmap has been applied. Assure that the pixmap
 505             // is scaled to the maximum available size.
 506             KPixmapModifier::scale(m_pixmap, QSize(maxIconWidth, maxIconHeight));
 507         }
 508
 509         const QStringList overlays = values["iconOverlays"].toStringList();
 510
 511         // Strangely KFileItem::overlays() returns empty string-values, so
 512         // we need to check first whether an overlay must be drawn at all.
 513         // It is more efficient to do it here, as KIconLoader::drawOverlays()
 514         // assumes that an overlay will be drawn and has some additional
 515         // setup time.
 516         foreach (const QString& overlay, overlays) {
 517             if (!overlay.isEmpty()) {
 518                 // There is at least one overlay, draw all overlays above m_pixmap
 519                 // and cancel the check
 520                 KIconLoader::global()->drawOverlays(overlays, m_pixmap, KIconLoader::Desktop);
 521                 break;
 522             }
 523         }
 524
 525         if (m_isCut) {
 526             applyCutEffect(m_pixmap);
 527         }
 528
 529         if (m_isHidden) {
 530             applyHiddenEffect(m_pixmap);
 531         }
 532     }
 533
 534     if (!m_overlay.isNull()) {
 535         QPainter painter(&m_pixmap);
 536         painter.drawPixmap(0, m_pixmap.height() - m_overlay.height(), m_overlay);
 537     }
 538
 539     int scaledIconSize = 0;
 540     if (iconOnTop) {
 541         scaledIconSize = static_cast<int>(m_textPos[Name].y() - 2 * padding);
 542     } else {
 543         const int textRowsCount = (m_layout == CompactLayout) ? visibleRoles().count() : 1;
 544         const qreal requiredTextHeight = textRowsCount * option.fontMetrics.height();
 545         scaledIconSize = (requiredTextHeight < maxIconHeight) ?
 546                            widgetSize.height() - 2 * padding : maxIconHeight;
 547     }
 548
 549     const int maxScaledIconWidth = iconOnTop ? widgetSize.width() - 2 * padding : scaledIconSize;
 550     const int maxScaledIconHeight = scaledIconSize;
 551
 552     m_scaledPixmapSize = m_pixmap.size();
 553     m_scaledPixmapSize.scale(maxScaledIconWidth, maxScaledIconHeight, Qt::KeepAspectRatio);
 554
 555     if (iconOnTop) {
 556         // Center horizontally and align on bottom within the icon-area
 557         m_pixmapPos.setX((widgetSize.width() - m_scaledPixmapSize.width()) / 2);
 558         m_pixmapPos.setY(padding + scaledIconSize - m_scaledPixmapSize.height());
 559     } else {
 560         // Center horizontally and vertically within the icon-area
 561         m_pixmapPos.setX(m_textPos[Name].x() - 2 * padding
 562                          - (scaledIconSize + m_scaledPixmapSize.width()) / 2);
 563         m_pixmapPos.setY(padding
 564                          + (scaledIconSize - m_scaledPixmapSize.height()) / 2);
 565     }
 566
 567     m_iconRect = QRectF(m_pixmapPos, QSizeF(m_scaledPixmapSize));
 568
 569     // Prepare the pixmap that is used when the item gets hovered
 570     if (isHovered()) {
 571         m_hoverPixmap = m_pixmap;
 572         KIconEffect* effect = KIconLoader::global()->iconEffect();
 573         // In the KIconLoader terminology, active = hover.
 574         if (effect->hasEffect(KIconLoader::Desktop, KIconLoader::ActiveState)) {
 575             m_hoverPixmap = effect->apply(m_pixmap, KIconLoader::Desktop, KIconLoader::ActiveState);
 576         } else {
 577             m_hoverPixmap = m_pixmap;
 578         }
 579     } else if (hoverOpacity() <= 0.0) {
 580         // No hover animation is ongoing. Clear m_hoverPixmap to save memory.
 581         m_hoverPixmap = QPixmap();
 582     }
 583 }
 584
 585 void KFileItemListWidget::updateTextsCache()
 586 {
 587     QTextOption textOption;
 588     switch (m_layout) {
 589     case IconsLayout:
 590         textOption.setWrapMode(QTextOption::WrapAtWordBoundaryOrAnywhere);
 591         textOption.setAlignment(Qt::AlignHCenter);
 592         break;
 593     case CompactLayout:
 594     case DetailsLayout:
 595         textOption.setAlignment(Qt::AlignLeft);
 596         textOption.setWrapMode(QTextOption::NoWrap);
 597         break;
 598     default:
 599         Q_ASSERT(false);
 600         break;
 601     }
 602
 603     for (int i = 0; i < TextIdCount; ++i) {
 604         m_text[i].setText(QString());
 605         m_text[i].setTextOption(textOption);
 606     }
 607
 608     switch (m_layout) {
 609     case IconsLayout:   updateIconsLayoutTextCache(); break;
 610     case CompactLayout: updateCompactLayoutTextCache(); break;
 611     case DetailsLayout: updateDetailsLayoutTextCache(); break;
 612     default: Q_ASSERT(false); break;
 613     }
 614 }
 615
 616 void KFileItemListWidget::updateIconsLayoutTextCache()
 617 {
 618     //      +------+
 619     //      | Icon |
 620     //      +------+
 621     //
 622     //    Name role that
 623     // might get wrapped above
 624     //    several lines.
 625     //  Additional role 1
 626     //  Additional role 2
 627
 628     const QHash<QByteArray, QVariant> values = data();
 629
 630     const KItemListStyleOption& option = styleOption();
 631     const qreal padding = option.padding;
 632     const qreal maxWidth = size().width() - 2 * padding;
 633     const qreal widgetHeight = size().height();
 634     const qreal fontHeight = option.fontMetrics.height();
 635
 636     // Initialize properties for the "name" role. It will be used as anchor
 637     // for initializing the position of the other roles.
 638     m_text[Name].setText(KStringHandler::preProcessWrap(values["name"].toString()));
 639
 640     // Calculate the number of lines required for the name and the required width
 641     int textLinesCountForName = 0;
 642     qreal requiredWidthForName = 0;
 643     QTextLine line;
 644
 645     QTextLayout layout(m_text[Name].text(), option.font);
 646     layout.setTextOption(m_text[Name].textOption());
 647     layout.beginLayout();
 648     while ((line = layout.createLine()).isValid()) {
 649         line.setLineWidth(maxWidth);
 650         requiredWidthForName = qMax(requiredWidthForName, line.naturalTextWidth());
 651         ++textLinesCountForName;
 652     }
 653     layout.endLayout();
 654
 655     // Use one line for each additional information
 656     int textLinesCount = textLinesCountForName;
 657     const int additionalRolesCount = qMax(visibleRoles().count() - 1, 0);
 658     textLinesCount += additionalRolesCount;
 659
 660     m_text[Name].setTextWidth(maxWidth);
 661     m_textPos[Name] = QPointF(padding, widgetHeight - textLinesCount * fontHeight - padding);
 662     m_textRect = QRectF(padding + (maxWidth - requiredWidthForName) / 2,
 663                         m_textPos[Name].y(),
 664                         requiredWidthForName,
 665                         textLinesCountForName * fontHeight);
 666
 667     // Calculate the position for each additional information
 668     qreal y = m_textPos[Name].y() + textLinesCountForName * fontHeight;
 669     foreach (const QByteArray& role, m_sortedVisibleRoles) {
 670         const TextId textId = roleTextId(role);
 671         if (textId == Name) {
 672             continue;
 673         }
 674
 675         const QString text = roleText(role, values);
 676         m_text[textId].setText(text);
 677
 678         qreal requiredWidth = 0;
 679
 680         QTextLayout layout(text, option.font);
 681         layout.setTextOption(m_text[textId].textOption());
 682         layout.beginLayout();
 683         QTextLine textLine = layout.createLine();
 684         if (textLine.isValid()) {
 685             textLine.setLineWidth(maxWidth);
 686             requiredWidth = textLine.naturalTextWidth();
 687             if (textLine.textLength() < text.length()) {
 688                 // TODO: QFontMetrics::elidedText() works different regarding the given width
 689                 // in comparison to QTextLine::setLineWidth(). It might happen that the text does
 690                 // not get elided although it does not fit into the given width. As workaround
 691                 // the padding is substracted.
 692                 const QString elidedText = option.fontMetrics.elidedText(text, Qt::ElideRight, maxWidth - padding);
 693                 m_text[textId].setText(elidedText);
 694             }
 695         }
 696         layout.endLayout();
 697
 698         m_textPos[textId] = QPointF(padding, y);
 699         m_text[textId].setTextWidth(maxWidth);
 700
 701         const QRectF textRect(padding + (maxWidth - requiredWidth) / 2, y, requiredWidth, fontHeight);
 702         m_textRect |= textRect;
 703
 704         y += fontHeight;
 705     }
 706
 707     // Add a padding to the text rectangle
 708     m_textRect.adjust(-padding, -padding, padding, padding);
 709 }
 710
 711 void KFileItemListWidget::updateCompactLayoutTextCache()
 712 {
 713     // +------+  Name role
 714     // | Icon |  Additional role 1
 715     // +------+  Additional role 2
 716
 717     const QHash<QByteArray, QVariant> values = data();
 718
 719     const KItemListStyleOption& option = styleOption();
 720     const qreal widgetHeight = size().height();
 721     const qreal fontHeight = option.fontMetrics.height();
 722     const qreal textLinesHeight = qMax(visibleRoles().count(), 1) * fontHeight;
 723     const int scaledIconSize = (textLinesHeight < option.iconSize) ? widgetHeight - 2 * option.padding : option.iconSize;
 724
 725     qreal maximumRequiredTextWidth = 0;
 726     const qreal x = option.padding * 3 + scaledIconSize;
 727     qreal y = (widgetHeight - textLinesHeight) / 2;
 728     const qreal maxWidth = size().width() - x - option.padding;
 729     foreach (const QByteArray& role, m_sortedVisibleRoles) {
 730         const TextId textId = roleTextId(role);
 731
 732         const QString text = roleText(role, values);
 733         m_text[textId].setText(text);
 734
 735         qreal requiredWidth = option.fontMetrics.width(text);
 736         if (requiredWidth > maxWidth) {
 737             requiredWidth = maxWidth;
 738             const QString elidedText = option.fontMetrics.elidedText(text, Qt::ElideRight, maxWidth);
 739             m_text[textId].setText(elidedText);
 740         }
 741
 742         m_textPos[textId] = QPointF(x, y);
 743         m_text[textId].setTextWidth(maxWidth);
 744
 745         maximumRequiredTextWidth = qMax(maximumRequiredTextWidth, requiredWidth);
 746
 747         y += fontHeight;
 748     }
 749
 750     m_textRect = QRectF(x - option.padding, 0, maximumRequiredTextWidth + 2 * option.padding, widgetHeight);
 751 }
 752
 753 void KFileItemListWidget::updateDetailsLayoutTextCache()
 754 {
 755     // Precondition: Requires already updated m_expansionArea
 756     // to determine the left position.
 757
 758     // +------+
 759     // | Icon |  Name role   Additional role 1   Additional role 2
 760     // +------+
 761     m_textRect = QRectF();
 762
 763     const KItemListStyleOption& option = styleOption();
 764     const QHash<QByteArray, QVariant> values = data();
 765
 766     const qreal widgetHeight = size().height();
 767     const int scaledIconSize = widgetHeight - 2 * option.padding;
 768     const int fontHeight = option.fontMetrics.height();
 769
 770     const qreal columnPadding = option.padding * 3;
 771     qreal firstColumnInc = scaledIconSize;
 772     if (m_supportsItemExpanding) {
 773         firstColumnInc += (m_expansionArea.left() + m_expansionArea.right() + widgetHeight) / 2;
 774     } else {
 775         firstColumnInc += option.padding;
 776     }
 777
 778     qreal x = firstColumnInc;
 779     const qreal y = qMax(qreal(option.padding), (widgetHeight - fontHeight) / 2);
 780
 781     foreach (const QByteArray& role, m_sortedVisibleRoles) {
 782         const TextId textId = roleTextId(role);
 783
 784         QString text = roleText(role, values);
 785
 786         // Elide the text in case it does not fit into the available column-width
 787         qreal requiredWidth = option.fontMetrics.width(text);
 788         const qreal roleWidth = columnWidth(role);
 789         qreal availableTextWidth = roleWidth - 2 * columnPadding;
 790         if (textId == Name) {
 791             availableTextWidth -= firstColumnInc;
 792         }
 793
 794         if (requiredWidth > availableTextWidth) {
 795             text = option.fontMetrics.elidedText(text, Qt::ElideRight, availableTextWidth);
 796             requiredWidth = option.fontMetrics.width(text);
 797         }
 798
 799         m_text[textId].setText(text);
 800         m_textPos[textId] = QPointF(x + columnPadding, y);
 801         x += roleWidth;
 802
 803         switch (textId) {
 804         case Name: {
 805             const qreal textWidth = option.extendedSelectionRegion
 806                                     ? size().width() - m_textPos[textId].x()
 807                                     : requiredWidth + 2 * option.padding;
 808             m_textRect = QRectF(m_textPos[textId].x() - option.padding, 0,
 809                                 textWidth, size().height());
 810
 811             // The column after the name should always be aligned on the same x-position independent
 812             // from the expansion-level shown in the name column
 813             x -= firstColumnInc;
 814             break;
 815         }
 816         case Size:
 817             // The values for the size should be right aligned
 818             m_textPos[textId].rx() += roleWidth - requiredWidth - 2 * columnPadding;
 819             break;
 820
 821         default:
 822             break;
 823         }
 824     }
 825 }
 826
 827 void KFileItemListWidget::updateAdditionalInfoTextColor()
 828 {
 829     QColor c1;
 830     if (m_customTextColor.isValid()) {
 831         c1 = m_customTextColor;
 832     } else if (isSelected() && m_layout != DetailsLayout) {
 833         c1 = styleOption().palette.highlightedText().color();
 834     } else {
 835         c1 = styleOption().palette.text().color();
 836     }
 837
 838     // For the color of the additional info the inactive text color
 839     // is not used as this might lead to unreadable text for some color schemes. Instead
 840     // the text color c1 is slightly mixed with the background color.
 841     const QColor c2 = styleOption().palette.base().color();
 842     const int p1 = 70;
 843     const int p2 = 100 - p1;
 844     m_additionalInfoTextColor = QColor((c1.red()   * p1 + c2.red()   * p2) / 100,
 845                                        (c1.green() * p1 + c2.green() * p2) / 100,
 846                                        (c1.blue()  * p1 + c2.blue()  * p2) / 100);
 847 }
 848
 849 void KFileItemListWidget::drawPixmap(QPainter* painter, const QPixmap& pixmap)
 850 {
 851     if (m_scaledPixmapSize != pixmap.size()) {
 852         QPixmap scaledPixmap = pixmap;
 853         KPixmapModifier::scale(scaledPixmap, m_scaledPixmapSize);
 854         painter->drawPixmap(m_pixmapPos, scaledPixmap);
 855
 856 #ifdef KFILEITEMLISTWIDGET_DEBUG
 857         painter->setPen(Qt::blue);
 858         painter->drawRect(QRectF(m_pixmapPos, QSizeF(m_scaledPixmapSize)));
 859 #endif
 860     } else {
 861         painter->drawPixmap(m_pixmapPos, pixmap);
 862     }
 863 }
 864
 865 void KFileItemListWidget::drawSiblingsInformation(QPainter* painter)
 866 {
 867     const int siblingSize = size().height();
 868     const int x = (m_expansionArea.left() + m_expansionArea.right() - siblingSize) / 2;
 869     QRect siblingRect(x, 0, siblingSize, siblingSize);
 870
 871     QStyleOption option;
 872     bool isItemSibling = true;
 873
 874     const QBitArray siblings = siblingsInformation();
 875     for (int i = siblings.count() - 1; i >= 0; --i) {
 876         option.rect = siblingRect;
 877         option.state = siblings.at(i) ? QStyle::State_Sibling : QStyle::State_None;
 878
 879         if (isItemSibling) {
 880             option.state |= QStyle::State_Item;
 881             if (m_isExpandable) {
 882                 option.state |= QStyle::State_Children;
 883             }
 884             if (data()["isExpanded"].toBool()) {
 885                 option.state |= QStyle::State_Open;
 886             }
 887             isItemSibling = false;
 888         }
 889
 890         style()->drawPrimitive(QStyle::PE_IndicatorBranch, &option, painter);
 891
 892         siblingRect.translate(-siblingRect.width(), 0);
 893     }
 894 }
 895
 896 QPixmap KFileItemListWidget::pixmapForIcon(const QString& name, int size)
 897 {
 898     const KIcon icon(name);
 899
 900     int requestedSize;
 901     if (size <= KIconLoader::SizeSmall) {
 902         requestedSize = KIconLoader::SizeSmall;
 903     } else if (size <= KIconLoader::SizeSmallMedium) {
 904         requestedSize = KIconLoader::SizeSmallMedium;
 905     } else if (size <= KIconLoader::SizeMedium) {
 906         requestedSize = KIconLoader::SizeMedium;
 907     } else if (size <= KIconLoader::SizeLarge) {
 908         requestedSize = KIconLoader::SizeLarge;
 909     } else if (size <= KIconLoader::SizeHuge) {
 910         requestedSize = KIconLoader::SizeHuge;
 911     } else if (size <= KIconLoader::SizeEnormous) {
 912         requestedSize = KIconLoader::SizeEnormous;
 913     } else if (size <= KIconLoader::SizeEnormous * 2) {
 914         requestedSize = KIconLoader::SizeEnormous * 2;
 915     } else {
 916         requestedSize = size;
 917     }
 918
 919     QPixmap pixmap = icon.pixmap(requestedSize, requestedSize);
 920     if (requestedSize != size) {
 921         KPixmapModifier::scale(pixmap, QSize(size, size));
 922     }
 923
 924     return pixmap;
 925 }
 926
 927 KFileItemListWidget::TextId KFileItemListWidget::roleTextId(const QByteArray& role)
 928 {
 929     static QHash<QByteArray, TextId> rolesHash;
 930     if (rolesHash.isEmpty()) {
 931         rolesHash.insert("name", Name);
 932         rolesHash.insert("size", Size);
 933         rolesHash.insert("date", Date);
 934         rolesHash.insert("permissions", Permissions);
 935         rolesHash.insert("owner", Owner);
 936         rolesHash.insert("group", Group);
 937         rolesHash.insert("type", Type);
 938         rolesHash.insert("destination", Destination);
 939         rolesHash.insert("path", Path);
 940     }
 941
 942     return rolesHash.value(role);
 943 }
 944
 945 void KFileItemListWidget::applyCutEffect(QPixmap& pixmap)
 946 {
 947     KIconEffect* effect = KIconLoader::global()->iconEffect();
 948     pixmap = effect->apply(pixmap, KIconLoader::Desktop, KIconLoader::DisabledState);
 949 }
 950
 951 void KFileItemListWidget::applyHiddenEffect(QPixmap& pixmap)
 952 {
 953     KIconEffect::semiTransparent(pixmap);
 954 }
 955
 956 #include "kfileitemlistwidget.moc"