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