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 "kfileitemmodel.h"
  23 #include "kitemlistview.h"
  24 #include "kpixmapmodifier_p.h"
  25
  26 #include <KIcon>
  27 #include <KIconEffect>
  28 #include <KIconLoader>
  29 #include <KLocale>
  30 #include <KStringHandler>
  31 #include <KDebug>
  32
  33 #include <QFontMetricsF>
  34 #include <QGraphicsSceneResizeEvent>
  35 #include <QPainter>
  36 #include <QStyleOption>
  37 #include <QTextLayout>
  38 #include <QTextLine>
  39
  40 //#define KFILEITEMLISTWIDGET_DEBUG
  41
  42 KFileItemListWidget::KFileItemListWidget(QGraphicsItem* parent) :
  43     KItemListWidget(parent),
  44     m_isDir(false),
  45     m_dirtyLayout(true),
  46     m_dirtyContent(true),
  47     m_dirtyContentRoles(),
  48     m_layout(IconsLayout),
  49     m_pixmapPos(),
  50     m_pixmap(),
  51     m_scaledPixmapSize(),
  52     m_hoverPixmapRect(),
  53     m_hoverPixmap(),
  54     m_textPos(),
  55     m_text(),
  56     m_textRect(),
  57     m_sortedVisibleRoles(),
  58     m_expansionArea(),
  59     m_customTextColor(),
  60     m_additionalInfoTextColor(),
  61     m_overlay()
  62 {
  63     for (int i = 0; i < TextIdCount; ++i) {
  64         m_text[i].setTextFormat(Qt::PlainText);
  65         m_text[i].setPerformanceHint(QStaticText::AggressiveCaching);
  66     }
  67 }
  68
  69 KFileItemListWidget::~KFileItemListWidget()
  70 {
  71 }
  72
  73 void KFileItemListWidget::setLayout(Layout layout)
  74 {
  75     if (m_layout != layout) {
  76         m_layout = layout;
  77         m_dirtyLayout = true;
  78         update();
  79     }
  80 }
  81
  82 KFileItemListWidget::Layout KFileItemListWidget::layout() const
  83 {
  84     return m_layout;
  85 }
  86
  87 void KFileItemListWidget::paint(QPainter* painter, const QStyleOptionGraphicsItem* option, QWidget* widget)
  88 {
  89     KItemListWidget::paint(painter, option, widget);
  90
  91     const_cast<KFileItemListWidget*>(this)->triggerCacheRefreshing();
  92
  93     // Draw expansion toggle '>' or 'V'
  94     if (m_isDir && !m_expansionArea.isEmpty()) {
  95         QStyleOption arrowOption;
  96         arrowOption.rect = m_expansionArea.toRect();
  97         const QStyle::PrimitiveElement arrow = data()["isExpanded"].toBool()
  98                                                ? QStyle::PE_IndicatorArrowDown : QStyle::PE_IndicatorArrowRight;
  99         style()->drawPrimitive(arrow, &arrowOption, painter);
 100     }
 101
 102     const KItemListStyleOption& itemListStyleOption = styleOption();
 103     if (isHovered()) {
 104         // Blend the unhovered and hovered pixmap if the hovering
 105         // animation is ongoing
 106         if (hoverOpacity() < 1.0) {
 107             drawPixmap(painter, m_pixmap);
 108         }
 109
 110         const qreal opacity = painter->opacity();
 111         painter->setOpacity(hoverOpacity() * opacity);
 112         drawPixmap(painter, m_hoverPixmap);
 113         painter->setOpacity(opacity);
 114     } else {
 115         drawPixmap(painter, m_pixmap);
 116     }
 117
 118     painter->setFont(itemListStyleOption.font);
 119     painter->setPen(textColor());
 120     painter->drawStaticText(m_textPos[Name], m_text[Name]);
 121
 122     bool clipAdditionalInfoBounds = false;
 123     if (m_layout == DetailsLayout) {
 124         // Prevent a possible overlapping of the additional-information texts
 125         // with the icon. This can happen if the user has minimized the width
 126         // of the name-column to a very small value.
 127         const qreal minX = m_pixmapPos.x() + m_pixmap.width() + 4 * itemListStyleOption.margin;
 128         if (m_textPos[Name + 1].x() < minX) {
 129             clipAdditionalInfoBounds = true;
 130             painter->save();
 131             painter->setClipRect(minX, 0, size().width() - minX, size().height(), Qt::IntersectClip);
 132         }
 133     }
 134
 135     painter->setPen(m_additionalInfoTextColor);
 136     painter->setFont(itemListStyleOption.font);
 137     for (int i = Name + 1; i < TextIdCount; ++i) {
 138         painter->drawStaticText(m_textPos[i], m_text[i]);
 139     }
 140
 141     if (clipAdditionalInfoBounds) {
 142         painter->restore();
 143     }
 144
 145 #ifdef KFILEITEMLISTWIDGET_DEBUG
 146     painter->setPen(Qt::red);
 147     painter->setBrush(Qt::NoBrush);
 148     painter->drawText(QPointF(0, itemListStyleOption.fontMetrics.height()), QString::number(index()));
 149     painter->drawRect(rect());
 150 #endif
 151 }
 152
 153 QRectF KFileItemListWidget::iconRect() const
 154 {
 155     const_cast<KFileItemListWidget*>(this)->triggerCacheRefreshing();
 156
 157     QRectF bounds = m_hoverPixmapRect;
 158     const qreal margin = styleOption().margin;
 159     bounds.adjust(-margin, -margin, margin, margin);
 160     return bounds;
 161 }
 162
 163 QRectF KFileItemListWidget::textRect() const
 164 {
 165     const_cast<KFileItemListWidget*>(this)->triggerCacheRefreshing();
 166     return m_textRect;
 167 }
 168
 169 QRectF KFileItemListWidget::expansionToggleRect() const
 170 {
 171     const_cast<KFileItemListWidget*>(this)->triggerCacheRefreshing();
 172     return m_isDir ? m_expansionArea : QRectF();
 173 }
 174
 175 QString KFileItemListWidget::roleText(const QByteArray& role, const QHash<QByteArray, QVariant>& values)
 176 {
 177     QString text;
 178     const QVariant roleValue = values.value(role);
 179
 180     switch (roleTextId(role)) {
 181     case Name:
 182     case Permissions:
 183     case Owner:
 184     case Group:
 185     case Type:
 186     case Destination:
 187     case Path:
 188         text = roleValue.toString();
 189         break;
 190
 191     case Size: {
 192         if (values.value("isDir").toBool()) {
 193             // The item represents a directory. Show the number of sub directories
 194             // instead of the file size of the directory.
 195             if (roleValue.isNull()) {
 196                 text = i18nc("@item:intable", "Unknown");
 197             } else {
 198                 const KIO::filesize_t size = roleValue.value<KIO::filesize_t>();
 199                 text = i18ncp("@item:intable", "%1 item", "%1 items", size);
 200             }
 201         } else {
 202             // Show the size in kilobytes (always round up)
 203             const KLocale* locale = KGlobal::locale();
 204             const int roundInc = (locale->binaryUnitDialect() == KLocale::MetricBinaryDialect) ? 499 : 511;
 205             const KIO::filesize_t size = roleValue.value<KIO::filesize_t>() + roundInc;
 206             text = locale->formatByteSize(size, 0, KLocale::DefaultBinaryDialect, KLocale::UnitKiloByte);
 207         }
 208         break;
 209     }
 210
 211     case Date: {
 212         const QDateTime dateTime = roleValue.toDateTime();
 213         text = KGlobal::locale()->formatDateTime(dateTime);
 214         break;
 215     }
 216
 217     default:
 218         Q_ASSERT(false);
 219         break;
 220     }
 221
 222     return text;
 223 }
 224
 225 void KFileItemListWidget::invalidateCache()
 226 {
 227     m_dirtyLayout = true;
 228     m_dirtyContent = true;
 229 }
 230
 231 void KFileItemListWidget::refreshCache()
 232 {
 233 }
 234
 235 void KFileItemListWidget::setTextColor(const QColor& color)
 236 {
 237     if (color != m_customTextColor) {
 238         m_customTextColor = color;
 239         updateAdditionalInfoTextColor();
 240         update();
 241     }
 242 }
 243
 244 QColor KFileItemListWidget::textColor() const
 245 {
 246     return m_customTextColor.isValid() ? m_customTextColor : styleOption().palette.text().color();
 247 }
 248
 249 void KFileItemListWidget::setOverlay(const QPixmap& overlay)
 250 {
 251     m_overlay = overlay;
 252     m_dirtyContent = true;
 253     update();
 254 }
 255
 256 QPixmap KFileItemListWidget::overlay() const
 257 {
 258     return m_overlay;
 259 }
 260
 261 void KFileItemListWidget::dataChanged(const QHash<QByteArray, QVariant>& current,
 262                                       const QSet<QByteArray>& roles)
 263 {
 264     KItemListWidget::dataChanged(current, roles);
 265     m_dirtyContent = true;
 266
 267     QSet<QByteArray> dirtyRoles;
 268     if (roles.isEmpty()) {
 269         dirtyRoles = visibleRoles().toSet();
 270         dirtyRoles.insert("iconPixmap");
 271         dirtyRoles.insert("iconName");
 272     } else {
 273         dirtyRoles = roles;
 274     }
 275
 276     QSetIterator<QByteArray> it(dirtyRoles);
 277     while (it.hasNext()) {
 278         const QByteArray& role = it.next();
 279         m_dirtyContentRoles.insert(role);
 280     }
 281 }
 282
 283 void KFileItemListWidget::visibleRolesChanged(const QList<QByteArray>& current,
 284                                               const QList<QByteArray>& previous)
 285 {
 286     KItemListWidget::visibleRolesChanged(current, previous);
 287     m_sortedVisibleRoles = current;
 288     m_dirtyLayout = true;
 289 }
 290
 291 void KFileItemListWidget::visibleRolesSizesChanged(const QHash<QByteArray, QSizeF>& current,
 292                                                    const QHash<QByteArray, QSizeF>& previous)
 293 {
 294     KItemListWidget::visibleRolesSizesChanged(current, previous);
 295     m_dirtyLayout = true;
 296 }
 297
 298 void KFileItemListWidget::styleOptionChanged(const KItemListStyleOption& current,
 299                                              const KItemListStyleOption& previous)
 300 {
 301     KItemListWidget::styleOptionChanged(current, previous);
 302     updateAdditionalInfoTextColor();
 303     m_dirtyLayout = true;
 304 }
 305
 306 void KFileItemListWidget::hoveredChanged(bool hovered)
 307 {
 308     Q_UNUSED(hovered);
 309     m_dirtyLayout = true;
 310 }
 311
 312 void KFileItemListWidget::resizeEvent(QGraphicsSceneResizeEvent* event)
 313 {
 314     KItemListWidget::resizeEvent(event);
 315     m_dirtyLayout = true;
 316 }
 317
 318 void KFileItemListWidget::triggerCacheRefreshing()
 319 {
 320     if ((!m_dirtyContent && !m_dirtyLayout) || index() < 0) {
 321         return;
 322     }
 323
 324     refreshCache();
 325
 326     m_isDir = data()["isDir"].toBool();
 327
 328     updateExpansionArea();
 329     updateTextsCache();
 330     updatePixmapCache();
 331
 332     m_dirtyLayout = false;
 333     m_dirtyContent = false;
 334     m_dirtyContentRoles.clear();
 335 }
 336
 337 void KFileItemListWidget::updateExpansionArea()
 338 {
 339     if (m_layout == DetailsLayout) {
 340         const QHash<QByteArray, QVariant> values = data();
 341         Q_ASSERT(values.contains("expansionLevel"));
 342         const KItemListStyleOption& option = styleOption();
 343         const int expansionLevel = values.value("expansionLevel", 0).toInt();
 344
 345         const qreal widgetHeight = size().height();
 346         const qreal expansionLevelSize = KIconLoader::SizeSmall;
 347         const qreal x = option.margin + expansionLevel * widgetHeight;
 348         const qreal y = (widgetHeight - expansionLevelSize) / 2;
 349         m_expansionArea = QRectF(x, y, expansionLevelSize, expansionLevelSize);
 350     } else {
 351         m_expansionArea = QRectF();
 352     }
 353 }
 354
 355 void KFileItemListWidget::updatePixmapCache()
 356 {
 357     // Precondition: Requires already updated m_textPos values to calculate
 358     // the remaining height when the alignment is vertical.
 359
 360     const bool iconOnTop = (m_layout == IconsLayout);
 361     const KItemListStyleOption& option = styleOption();
 362     const int iconHeight = option.iconSize;
 363
 364     const QHash<QByteArray, QVariant> values = data();
 365     const QSizeF widgetSize = size();
 366
 367     int scaledIconHeight = 0;
 368     if (iconOnTop) {
 369         scaledIconHeight = static_cast<int>(m_textPos[Name].y() - 3 * option.margin);
 370     } else {
 371         const int textRowsCount = (m_layout == CompactLayout) ? visibleRoles().count() : 1;
 372         const qreal requiredTextHeight = textRowsCount * option.fontMetrics.height();
 373         scaledIconHeight = (requiredTextHeight < iconHeight) ? widgetSize.height() - 2 * option.margin : iconHeight;
 374     }
 375
 376     bool updatePixmap = (iconHeight != m_pixmap.height());
 377     if (!updatePixmap && m_dirtyContent) {
 378         updatePixmap = m_dirtyContentRoles.isEmpty()
 379                        || m_dirtyContentRoles.contains("iconPixmap")
 380                        || m_dirtyContentRoles.contains("iconName");
 381     }
 382
 383     if (updatePixmap) {
 384         m_pixmap = values["iconPixmap"].value<QPixmap>();
 385         if (m_pixmap.isNull()) {
 386             // Use the icon that fits to the MIME-type
 387             QString iconName = values["iconName"].toString();
 388             if (iconName.isEmpty()) {
 389                 // The icon-name has not been not resolved by KFileItemModelRolesUpdater,
 390                 // use a generic icon as fallback
 391                 iconName = QLatin1String("unknown");
 392             }
 393             m_pixmap = pixmapForIcon(iconName, iconHeight);
 394             m_hoverPixmapRect.setSize(m_pixmap.size());
 395         } else if (m_pixmap.size() != QSize(iconHeight, iconHeight)) {
 396             // A custom pixmap has been applied. Assure that the pixmap
 397             // is scaled to the available size.
 398             const bool scale = m_pixmap.width() > iconHeight || m_pixmap.height() > iconHeight ||
 399                                (m_pixmap.width() < iconHeight && m_pixmap.height() < iconHeight);
 400             if (scale) {
 401                 KPixmapModifier::scale(m_pixmap, QSize(iconHeight, iconHeight));
 402             }
 403             m_hoverPixmapRect.setSize(m_pixmap.size());
 404
 405             // To simplify the handling of scaling the original pixmap
 406             // will be embedded into a square pixmap.
 407             QPixmap squarePixmap(iconHeight, iconHeight);
 408             squarePixmap.fill(Qt::transparent);
 409
 410             QPainter painter(&squarePixmap);
 411             if (iconOnTop) {
 412                 const int x = (iconHeight - m_pixmap.width()) / 2;  // Center horizontally
 413                 const int y = iconHeight - m_pixmap.height();       // Align on bottom
 414                 painter.drawPixmap(x, y, m_pixmap);
 415             } else {
 416                 const int x = iconHeight - m_pixmap.width();        // Align right
 417                 const int y = (iconHeight - m_pixmap.height()) / 2; // Center vertically
 418                 painter.drawPixmap(x, y, m_pixmap);
 419             }
 420
 421             m_pixmap = squarePixmap;
 422         } else {
 423             m_hoverPixmapRect.setSize(m_pixmap.size());
 424         }
 425
 426         Q_ASSERT(m_pixmap.height() == iconHeight);
 427     }
 428     if (!m_overlay.isNull()) {
 429         QPainter painter(&m_pixmap);
 430         painter.drawPixmap(0, m_pixmap.height() - m_overlay.height(), m_overlay);
 431     }
 432
 433     m_scaledPixmapSize = QSize(scaledIconHeight, scaledIconHeight);
 434
 435     if (iconOnTop) {
 436         m_pixmapPos.setX((widgetSize.width() - m_scaledPixmapSize.width()) / 2);
 437     } else {
 438         m_pixmapPos.setX(m_textPos[Name].x() - 2 * option.margin - scaledIconHeight);
 439     }
 440     m_pixmapPos.setY(option.margin);
 441
 442     // Center the hover rectangle horizontally and align it on bottom
 443     const qreal x = m_pixmapPos.x() + (m_scaledPixmapSize.width() - m_hoverPixmapRect.width()) / 2.0;
 444     const qreal y = m_pixmapPos.y() + m_scaledPixmapSize.height() - m_hoverPixmapRect.height();
 445     m_hoverPixmapRect.moveTopLeft(QPointF(x, y));
 446
 447     // Prepare the pixmap that is used when the item gets hovered
 448     if (isHovered()) {
 449         m_hoverPixmap = m_pixmap;
 450         KIconEffect* effect = KIconLoader::global()->iconEffect();
 451         // In the KIconLoader terminology, active = hover.
 452         if (effect->hasEffect(KIconLoader::Desktop, KIconLoader::ActiveState)) {
 453             m_hoverPixmap =  effect->apply(m_pixmap, KIconLoader::Desktop, KIconLoader::ActiveState);
 454         } else {
 455             m_hoverPixmap = m_pixmap;
 456         }
 457     } else if (hoverOpacity() <= 0.0) {
 458         // No hover animation is ongoing. Clear m_hoverPixmap to save memory.
 459         m_hoverPixmap = QPixmap();
 460     }
 461 }
 462
 463 void KFileItemListWidget::updateTextsCache()
 464 {
 465     QTextOption textOption;
 466     switch (m_layout) {
 467     case IconsLayout:
 468         textOption.setWrapMode(QTextOption::WrapAtWordBoundaryOrAnywhere);
 469         textOption.setAlignment(Qt::AlignHCenter);
 470         break;
 471     case CompactLayout:
 472     case DetailsLayout:
 473         textOption.setAlignment(Qt::AlignLeft);
 474         textOption.setWrapMode(QTextOption::NoWrap);
 475         break;
 476     default:
 477         Q_ASSERT(false);
 478         break;
 479     }
 480
 481     for (int i = 0; i < TextIdCount; ++i) {
 482         m_text[i].setText(QString());
 483         m_text[i].setTextOption(textOption);
 484     }
 485
 486     switch (m_layout) {
 487     case IconsLayout:   updateIconsLayoutTextCache(); break;
 488     case CompactLayout: updateCompactLayoutTextCache(); break;
 489     case DetailsLayout: updateDetailsLayoutTextCache(); break;
 490     default: Q_ASSERT(false); break;
 491     }
 492 }
 493
 494 void KFileItemListWidget::updateIconsLayoutTextCache()
 495 {
 496     //      +------+
 497     //      | Icon |
 498     //      +------+
 499     //
 500     //    Name role that
 501     // might get wrapped above
 502     //    several lines.
 503     //  Additional role 1
 504     //  Additional role 2
 505
 506     const QHash<QByteArray, QVariant> values = data();
 507
 508     const KItemListStyleOption& option = styleOption();
 509     const qreal maxWidth = size().width() - 2 * option.margin;
 510     const qreal widgetHeight = size().height();
 511     const qreal fontHeight = option.fontMetrics.height();
 512
 513     // Initialize properties for the "name" role. It will be used as anchor
 514     // for initializing the position of the other roles.
 515     m_text[Name].setText(KStringHandler::preProcessWrap(values["name"].toString()));
 516
 517     // Calculate the number of lines required for the name and the required width
 518     int textLinesCountForName = 0;
 519     qreal requiredWidthForName = 0;
 520     QTextLine line;
 521
 522     QTextLayout layout(m_text[Name].text(), option.font);
 523     layout.setTextOption(m_text[Name].textOption());
 524     layout.beginLayout();
 525     while ((line = layout.createLine()).isValid()) {
 526         line.setLineWidth(maxWidth);
 527         requiredWidthForName = qMax(requiredWidthForName, line.naturalTextWidth());
 528         ++textLinesCountForName;
 529     }
 530     layout.endLayout();
 531
 532     // Use one line for each additional information
 533     int textLinesCount = textLinesCountForName;
 534     const int additionalRolesCount = qMax(visibleRoles().count() - 1, 0);
 535     textLinesCount += additionalRolesCount;
 536
 537     m_text[Name].setTextWidth(maxWidth);
 538     m_textPos[Name] = QPointF(option.margin, widgetHeight - textLinesCount * fontHeight - option.margin);
 539     m_textRect = QRectF(option.margin + (maxWidth - requiredWidthForName) / 2,
 540                                  m_textPos[Name].y(),
 541                                  requiredWidthForName,
 542                                  m_text[Name].size().height());
 543
 544     // Calculate the position for each additional information
 545     qreal y = m_textPos[Name].y() + textLinesCountForName * fontHeight;
 546     foreach (const QByteArray& role, m_sortedVisibleRoles) {
 547         const TextId textId = roleTextId(role);
 548         if (textId == Name) {
 549             continue;
 550         }
 551
 552         const QString text = roleText(role, values);
 553         m_text[textId].setText(text);
 554
 555         qreal requiredWidth = 0;
 556
 557         QTextLayout layout(text, option.font);
 558         layout.setTextOption(m_text[textId].textOption());
 559         layout.beginLayout();
 560         QTextLine textLine = layout.createLine();
 561         if (textLine.isValid()) {
 562             textLine.setLineWidth(maxWidth);
 563             requiredWidth = textLine.naturalTextWidth();
 564             if (textLine.textLength() < text.length()) {
 565                 // TODO: QFontMetrics::elidedText() works different regarding the given width
 566                 // in comparison to QTextLine::setLineWidth(). It might happen that the text does
 567                 // not get elided although it does not fit into the given width. As workaround
 568                 // the margin is substracted.
 569                 const QString elidedText = option.fontMetrics.elidedText(text, Qt::ElideRight, maxWidth - option.margin);
 570                 m_text[textId].setText(elidedText);
 571             }
 572         }
 573         layout.endLayout();
 574
 575         m_textPos[textId] = QPointF(option.margin, y);
 576         m_text[textId].setTextWidth(maxWidth);
 577
 578         const QRectF textRect(option.margin + (maxWidth - requiredWidth) / 2, y, requiredWidth, fontHeight);
 579         m_textRect |= textRect;
 580
 581         y += fontHeight;
 582     }
 583
 584     // Add a margin to the text rectangle
 585     const qreal margin = option.margin;
 586     m_textRect.adjust(-margin, -margin, margin, margin);
 587 }
 588
 589 void KFileItemListWidget::updateCompactLayoutTextCache()
 590 {
 591     // +------+  Name role
 592     // | Icon |  Additional role 1
 593     // +------+  Additional role 2
 594
 595     const QHash<QByteArray, QVariant> values = data();
 596
 597     const KItemListStyleOption& option = styleOption();
 598     const qreal widgetHeight = size().height();
 599     const qreal fontHeight = option.fontMetrics.height();
 600     const qreal textLinesHeight = qMax(visibleRoles().count(), 1) * fontHeight;
 601     const int scaledIconSize = (textLinesHeight < option.iconSize) ? widgetHeight - 2 * option.margin : option.iconSize;
 602
 603     qreal maximumRequiredTextWidth = 0;
 604     const qreal x = option.margin * 3 + scaledIconSize;
 605     qreal y = (widgetHeight - textLinesHeight) / 2;
 606     const qreal maxWidth = size().width() - x - option.margin;
 607     foreach (const QByteArray& role, m_sortedVisibleRoles) {
 608         const TextId textId = roleTextId(role);
 609
 610         const QString text = roleText(role, values);
 611         m_text[textId].setText(text);
 612
 613         qreal requiredWidth = option.fontMetrics.width(text);
 614         if (requiredWidth > maxWidth) {
 615             requiredWidth = maxWidth;
 616             const QString elidedText = option.fontMetrics.elidedText(text, Qt::ElideRight, maxWidth);
 617             m_text[textId].setText(elidedText);
 618         }
 619
 620         m_textPos[textId] = QPointF(x, y);
 621         m_text[textId].setTextWidth(maxWidth);
 622
 623         maximumRequiredTextWidth = qMax(maximumRequiredTextWidth, requiredWidth);
 624
 625         y += fontHeight;
 626     }
 627
 628     m_textRect = QRectF(x - option.margin, 0, maximumRequiredTextWidth + 2 * option.margin, widgetHeight);
 629 }
 630
 631 void KFileItemListWidget::updateDetailsLayoutTextCache()
 632 {
 633     // Precondition: Requires already updated m_expansionArea
 634     // to determine the left position.
 635
 636     // +------+
 637     // | Icon |  Name role   Additional role 1   Additional role 2
 638     // +------+
 639     m_textRect = QRectF();
 640
 641     const KItemListStyleOption& option = styleOption();
 642     const QHash<QByteArray, QVariant> values = data();
 643
 644     const qreal widgetHeight = size().height();
 645     const int scaledIconSize = widgetHeight - 2 * option.margin;
 646     const int fontHeight = option.fontMetrics.height();
 647
 648     const qreal columnMargin = option.margin * 3;
 649     const qreal firstColumnInc = m_expansionArea.right() + option.margin * 2 + scaledIconSize;
 650     qreal x = firstColumnInc;
 651     const qreal y = qMax(qreal(option.margin), (widgetHeight - fontHeight) / 2);
 652
 653     foreach (const QByteArray& role, m_sortedVisibleRoles) {
 654         const TextId textId = roleTextId(role);
 655
 656         QString text = roleText(role, values);
 657
 658         // Elide the text in case it does not fit into the available column-width
 659         qreal requiredWidth = option.fontMetrics.width(text);
 660         const qreal columnWidth = visibleRolesSizes().value(role, QSizeF(0, 0)).width();
 661         qreal availableTextWidth = columnWidth - 2 * columnMargin;
 662         if (textId == Name) {
 663             availableTextWidth -= firstColumnInc;
 664         }
 665
 666         if (requiredWidth > availableTextWidth) {
 667             text = option.fontMetrics.elidedText(text, Qt::ElideRight, availableTextWidth);
 668             requiredWidth = option.fontMetrics.width(text);
 669         }
 670
 671         m_text[textId].setText(text);
 672         m_textPos[textId] = QPointF(x + columnMargin, y);
 673         x += columnWidth;
 674
 675         switch (textId) {
 676         case Name: {
 677             m_textRect = QRectF(m_textPos[textId].x() - option.margin, 0,
 678                                         requiredWidth + 2 * option.margin, size().height());
 679
 680             // The column after the name should always be aligned on the same x-position independent
 681             // from the expansion-level shown in the name column
 682             x -= firstColumnInc;
 683             break;
 684         }
 685         case Size:
 686             // The values for the size should be right aligned
 687             m_textPos[textId].rx() += columnWidth - requiredWidth - 2 * columnMargin;
 688             break;
 689
 690         default:
 691             break;
 692         }
 693     }
 694 }
 695
 696 void KFileItemListWidget::updateAdditionalInfoTextColor()
 697 {
 698     // For the color of the additional info the inactive text color
 699     // is not used as this might lead to unreadable text for some color schemes. Instead
 700     // the text color is slightly mixed with the background color.
 701     const QColor c1 = textColor();
 702     const QColor c2 = styleOption().palette.base().color();
 703     const int p1 = 70;
 704     const int p2 = 100 - p1;
 705     m_additionalInfoTextColor = QColor((c1.red()   * p1 + c2.red()   * p2) / 100,
 706                                        (c1.green() * p1 + c2.green() * p2) / 100,
 707                                        (c1.blue()  * p1 + c2.blue()  * p2) / 100);
 708 }
 709
 710 void KFileItemListWidget::drawPixmap(QPainter* painter, const QPixmap& pixmap)
 711 {
 712     const bool isHiddenItem = m_text[Name].text().startsWith(QLatin1Char('.'));
 713     qreal opacity;
 714     if (isHiddenItem) {
 715         opacity = painter->opacity();
 716         painter->setOpacity(opacity * 0.3);
 717     }
 718
 719     if (m_scaledPixmapSize != pixmap.size()) {
 720         QPixmap scaledPixmap = pixmap;
 721         KPixmapModifier::scale(scaledPixmap, m_scaledPixmapSize);
 722         painter->drawPixmap(m_pixmapPos, scaledPixmap);
 723
 724 #ifdef KFILEITEMLISTWIDGET_DEBUG
 725         painter->setPen(Qt::green);
 726         painter->drawRect(QRectF(m_pixmapPos, QSizeF(scaledPixmap.size())));
 727 #endif
 728     } else {
 729         painter->drawPixmap(m_pixmapPos, pixmap);
 730     }
 731
 732     if (isHiddenItem) {
 733         painter->setOpacity(opacity);
 734     }
 735 }
 736
 737 QPixmap KFileItemListWidget::pixmapForIcon(const QString& name, int size)
 738 {
 739     const KIcon icon(name);
 740
 741     int requestedSize;
 742     if (size <= KIconLoader::SizeSmall) {
 743         requestedSize = KIconLoader::SizeSmall;
 744     } else if (size <= KIconLoader::SizeSmallMedium) {
 745         requestedSize = KIconLoader::SizeSmallMedium;
 746     } else if (size <= KIconLoader::SizeMedium) {
 747         requestedSize = KIconLoader::SizeMedium;
 748     } else if (size <= KIconLoader::SizeLarge) {
 749         requestedSize = KIconLoader::SizeLarge;
 750     } else if (size <= KIconLoader::SizeHuge) {
 751         requestedSize = KIconLoader::SizeHuge;
 752     } else if (size <= KIconLoader::SizeEnormous) {
 753         requestedSize = KIconLoader::SizeEnormous;
 754     } else if (size <= KIconLoader::SizeEnormous * 2) {
 755         requestedSize = KIconLoader::SizeEnormous * 2;
 756     } else {
 757         requestedSize = size;
 758     }
 759
 760     QPixmap pixmap = icon.pixmap(requestedSize, requestedSize);
 761     if (requestedSize != size) {
 762         KPixmapModifier::scale(pixmap, QSize(size, size));
 763     }
 764
 765     return pixmap;
 766 }
 767
 768 KFileItemListWidget::TextId KFileItemListWidget::roleTextId(const QByteArray& role)
 769 {
 770     static QHash<QByteArray, TextId> rolesHash;
 771     if (rolesHash.isEmpty()) {
 772         rolesHash.insert("name", Name);
 773         rolesHash.insert("size", Size);
 774         rolesHash.insert("date", Date);
 775         rolesHash.insert("permissions", Permissions);
 776         rolesHash.insert("owner", Owner);
 777         rolesHash.insert("group", Group);
 778         rolesHash.insert("type", Type);
 779         rolesHash.insert("destination", Destination);
 780         rolesHash.insert("path", Path);
 781     }
 782
 783     return rolesHash.value(role);
 784 }
 785
 786 #include "kfileitemlistwidget.moc"