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