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_originalPixmapSize(),
  56     m_iconRect(),
  57     m_hoverPixmap(),
  58     m_textPos(),
  59     m_text(),
  60     m_textRect(),
  61     m_sortedVisibleRoles(),
  62     m_expansionArea(),
  63     m_customTextColor(),
  64     m_additionalInfoTextColor(),
  65     m_overlay()
  66 {
  67     for (int i = 0; i < TextIdCount; ++i) {
  68         m_text[i].setTextFormat(Qt::PlainText);
  69         m_text[i].setPerformanceHint(QStaticText::AggressiveCaching);
  70     }
  71 }
  72
  73 KFileItemListWidget::~KFileItemListWidget()
  74 {
  75 }
  76
  77 void KFileItemListWidget::setLayout(Layout layout)
  78 {
  79     if (m_layout != layout) {
  80         m_layout = layout;
  81         m_dirtyLayout = true;
  82         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                 text = i18nc("@item:intable", "Unknown");
 235             } else {
 236                 const KIO::filesize_t size = roleValue.value<KIO::filesize_t>();
 237                 text = i18ncp("@item:intable", "%1 item", "%1 items", size);
 238             }
 239         } else {
 240             // Show the size in kilobytes (always round up)
 241             const KLocale* locale = KGlobal::locale();
 242             const int roundInc = (locale->binaryUnitDialect() == KLocale::MetricBinaryDialect) ? 499 : 511;
 243             const KIO::filesize_t size = roleValue.value<KIO::filesize_t>() + roundInc;
 244             text = locale->formatByteSize(size, 0, KLocale::DefaultBinaryDialect, KLocale::UnitKiloByte);
 245         }
 246         break;
 247     }
 248
 249     case Date: {
 250         const QDateTime dateTime = roleValue.toDateTime();
 251         text = KGlobal::locale()->formatDateTime(dateTime);
 252         break;
 253     }
 254
 255     default:
 256         Q_ASSERT(false);
 257         break;
 258     }
 259
 260     return text;
 261 }
 262
 263 void KFileItemListWidget::invalidateCache()
 264 {
 265     m_dirtyLayout = true;
 266     m_dirtyContent = true;
 267 }
 268
 269 void KFileItemListWidget::refreshCache()
 270 {
 271 }
 272
 273 void KFileItemListWidget::setTextColor(const QColor& color)
 274 {
 275     if (color != m_customTextColor) {
 276         m_customTextColor = color;
 277         updateAdditionalInfoTextColor();
 278         update();
 279     }
 280 }
 281
 282 QColor KFileItemListWidget::textColor() const
 283 {
 284     if (m_customTextColor.isValid() && !isSelected()) {
 285         return m_customTextColor;
 286     }
 287
 288     const QPalette::ColorGroup group = isActiveWindow() ? QPalette::Active : QPalette::Inactive;
 289     const QPalette::ColorRole role = isSelected() ? QPalette::HighlightedText : QPalette::Text;
 290     return styleOption().palette.brush(group, role).color();
 291 }
 292
 293 void KFileItemListWidget::setOverlay(const QPixmap& overlay)
 294 {
 295     m_overlay = overlay;
 296     m_dirtyContent = true;
 297     update();
 298 }
 299
 300 QPixmap KFileItemListWidget::overlay() const
 301 {
 302     return m_overlay;
 303 }
 304
 305 void KFileItemListWidget::dataChanged(const QHash<QByteArray, QVariant>& current,
 306                                       const QSet<QByteArray>& roles)
 307 {
 308     KItemListWidget::dataChanged(current, roles);
 309     m_dirtyContent = true;
 310
 311     QSet<QByteArray> dirtyRoles;
 312     if (roles.isEmpty()) {
 313         dirtyRoles = visibleRoles().toSet();
 314         dirtyRoles.insert("iconPixmap");
 315         dirtyRoles.insert("iconName");
 316     } else {
 317         dirtyRoles = roles;
 318     }
 319
 320     QSetIterator<QByteArray> it(dirtyRoles);
 321     while (it.hasNext()) {
 322         const QByteArray& role = it.next();
 323         m_dirtyContentRoles.insert(role);
 324     }
 325 }
 326
 327 void KFileItemListWidget::visibleRolesChanged(const QList<QByteArray>& current,
 328                                               const QList<QByteArray>& previous)
 329 {
 330     KItemListWidget::visibleRolesChanged(current, previous);
 331     m_sortedVisibleRoles = current;
 332     m_dirtyLayout = true;
 333 }
 334
 335 void KFileItemListWidget::visibleRolesSizesChanged(const QHash<QByteArray, QSizeF>& current,
 336                                                    const QHash<QByteArray, QSizeF>& previous)
 337 {
 338     KItemListWidget::visibleRolesSizesChanged(current, previous);
 339     m_dirtyLayout = true;
 340 }
 341
 342 void KFileItemListWidget::styleOptionChanged(const KItemListStyleOption& current,
 343                                              const KItemListStyleOption& previous)
 344 {
 345     KItemListWidget::styleOptionChanged(current, previous);
 346     updateAdditionalInfoTextColor();
 347     m_dirtyLayout = true;
 348 }
 349
 350 void KFileItemListWidget::hoveredChanged(bool hovered)
 351 {
 352     Q_UNUSED(hovered);
 353     m_dirtyLayout = true;
 354 }
 355
 356 void KFileItemListWidget::selectedChanged(bool selected)
 357 {
 358     Q_UNUSED(selected);
 359     updateAdditionalInfoTextColor();
 360 }
 361
 362 void KFileItemListWidget::resizeEvent(QGraphicsSceneResizeEvent* event)
 363 {
 364     KItemListWidget::resizeEvent(event);
 365     m_dirtyLayout = true;
 366 }
 367
 368 void KFileItemListWidget::showEvent(QShowEvent* event)
 369 {
 370     KItemListWidget::showEvent(event);
 371
 372     // Listen to changes of the clipboard to mark the item as cut/uncut
 373     KFileItemClipboard* clipboard = KFileItemClipboard::instance();
 374
 375     const KUrl itemUrl = data().value("url").value<KUrl>();
 376     m_isCut = clipboard->isCut(itemUrl);
 377
 378     connect(clipboard, SIGNAL(cutItemsChanged()),
 379             this, SLOT(slotCutItemsChanged()));
 380 }
 381
 382 void KFileItemListWidget::hideEvent(QHideEvent* event)
 383 {
 384     disconnect(KFileItemClipboard::instance(), SIGNAL(cutItemsChanged()),
 385                this, SLOT(slotCutItemsChanged()));
 386
 387     KItemListWidget::hideEvent(event);
 388 }
 389
 390 void KFileItemListWidget::slotCutItemsChanged()
 391 {
 392     const KUrl itemUrl = data().value("url").value<KUrl>();
 393     const bool isCut = KFileItemClipboard::instance()->isCut(itemUrl);
 394     if (m_isCut != isCut) {
 395         m_isCut = isCut;
 396         m_pixmap = QPixmap();
 397         m_dirtyContent = true;
 398         update();
 399     }
 400 }
 401
 402 void KFileItemListWidget::triggerCacheRefreshing()
 403 {
 404     if ((!m_dirtyContent && !m_dirtyLayout) || index() < 0) {
 405         return;
 406     }
 407
 408     refreshCache();
 409
 410     const QHash<QByteArray, QVariant> values = data();
 411     m_isExpandable = values["isExpandable"].toBool();
 412     m_isHidden = values["name"].toString().startsWith(QLatin1Char('.'));
 413
 414     updateExpansionArea();
 415     updateTextsCache();
 416     updatePixmapCache();
 417
 418     m_dirtyLayout = false;
 419     m_dirtyContent = false;
 420     m_dirtyContentRoles.clear();
 421 }
 422
 423 void KFileItemListWidget::updateExpansionArea()
 424 {
 425     if (m_layout == DetailsLayout) {
 426         const QHash<QByteArray, QVariant> values = data();
 427         Q_ASSERT(values.contains("expansionLevel"));
 428         const KItemListStyleOption& option = styleOption();
 429         const int expansionLevel = values.value("expansionLevel", 0).toInt();
 430         if (expansionLevel >= 0) {
 431             const qreal widgetHeight = size().height();
 432             const qreal expansionLevelSize = KIconLoader::SizeSmall;
 433             const qreal x = option.margin + expansionLevel * widgetHeight;
 434             const qreal y = (widgetHeight - expansionLevelSize) / 2;
 435             m_expansionArea = QRectF(x, y, expansionLevelSize, expansionLevelSize);
 436             return;
 437         }
 438     }
 439
 440     m_expansionArea = QRectF();
 441 }
 442
 443 void KFileItemListWidget::updatePixmapCache()
 444 {
 445     // Precondition: Requires already updated m_textPos values to calculate
 446     // the remaining height when the alignment is vertical.
 447
 448     const bool iconOnTop = (m_layout == IconsLayout);
 449     const KItemListStyleOption& option = styleOption();
 450     const int iconHeight = option.iconSize;
 451
 452     const QHash<QByteArray, QVariant> values = data();
 453     const QSizeF widgetSize = size();
 454
 455     int scaledIconHeight = 0;
 456     if (iconOnTop) {
 457         scaledIconHeight = static_cast<int>(m_textPos[Name].y() - 3 * option.margin);
 458     } else {
 459         const int textRowsCount = (m_layout == CompactLayout) ? visibleRoles().count() : 1;
 460         const qreal requiredTextHeight = textRowsCount * option.fontMetrics.height();
 461         scaledIconHeight = (requiredTextHeight < iconHeight) ? widgetSize.height() - 2 * option.margin : iconHeight;
 462     }
 463
 464     bool updatePixmap = (iconHeight != m_pixmap.height());
 465     if (!updatePixmap && m_dirtyContent) {
 466         updatePixmap = m_dirtyContentRoles.isEmpty()
 467                        || m_dirtyContentRoles.contains("iconPixmap")
 468                        || m_dirtyContentRoles.contains("iconName")
 469                        || m_dirtyContentRoles.contains("iconOverlays");
 470     }
 471
 472     if (updatePixmap) {
 473         m_pixmap = values["iconPixmap"].value<QPixmap>();
 474         if (m_pixmap.isNull()) {
 475             // Use the icon that fits to the MIME-type
 476             QString iconName = values["iconName"].toString();
 477             if (iconName.isEmpty()) {
 478                 // The icon-name has not been not resolved by KFileItemModelRolesUpdater,
 479                 // use a generic icon as fallback
 480                 iconName = QLatin1String("unknown");
 481             }
 482             m_pixmap = pixmapForIcon(iconName, iconHeight);
 483             m_originalPixmapSize = m_pixmap.size();
 484         } else if (m_pixmap.size() != QSize(iconHeight, iconHeight)) {
 485             // A custom pixmap has been applied. Assure that the pixmap
 486             // is scaled to the available size.
 487             const bool scale = m_pixmap.width() > iconHeight || m_pixmap.height() > iconHeight ||
 488                                (m_pixmap.width() < iconHeight && m_pixmap.height() < iconHeight);
 489             if (scale) {
 490                 KPixmapModifier::scale(m_pixmap, QSize(iconHeight, iconHeight));
 491             }
 492             m_originalPixmapSize = m_pixmap.size();
 493
 494             // To simplify the handling of scaling the original pixmap
 495             // will be embedded into a square pixmap.
 496             QPixmap squarePixmap(iconHeight, iconHeight);
 497             squarePixmap.fill(Qt::transparent);
 498
 499             QPainter painter(&squarePixmap);
 500             const int x = (iconHeight - m_pixmap.width()) / 2;  // Center horizontally
 501             int y = iconHeight - m_pixmap.height();             // Move to bottom
 502             if (!iconOnTop) {
 503                 y /= 2.0;                                       // Center vertically
 504             }
 505             painter.drawPixmap(x, y, m_pixmap);
 506
 507             m_pixmap = squarePixmap;
 508         } else {
 509             m_originalPixmapSize = m_pixmap.size();
 510         }
 511
 512         const QStringList overlays = values["iconOverlays"].toStringList();
 513
 514         // Strangely KFileItem::overlays() returns empty string-values, so
 515         // we need to check first whether an overlay must be drawn at all.
 516         // It is more efficient to do it here, as KIconLoader::drawOverlays()
 517         // assumes that an overlay will be drawn and has some additional
 518         // setup time.
 519         foreach (const QString& overlay, overlays) {
 520             if (!overlay.isEmpty()) {
 521                 // There is at least one overlay, draw all overlays above m_pixmap
 522                 // and cancel the check
 523                 KIconLoader::global()->drawOverlays(overlays, m_pixmap, KIconLoader::Desktop);
 524                 break;
 525             }
 526         }
 527
 528         if (m_isCut) {
 529             applyCutEffect(m_pixmap);
 530         }
 531
 532         if (m_isHidden) {
 533             applyHiddenEffect(m_pixmap);
 534         }
 535
 536         Q_ASSERT(m_pixmap.height() == iconHeight);
 537     }
 538     if (!m_overlay.isNull()) {
 539         QPainter painter(&m_pixmap);
 540         painter.drawPixmap(0, m_pixmap.height() - m_overlay.height(), m_overlay);
 541     }
 542
 543     m_scaledPixmapSize = QSize(scaledIconHeight, scaledIconHeight);
 544
 545     if (iconOnTop) {
 546         m_pixmapPos.setX((widgetSize.width() - m_scaledPixmapSize.width()) / 2);
 547     } else {
 548         m_pixmapPos.setX(m_textPos[Name].x() - 2 * option.margin - scaledIconHeight);
 549     }
 550     m_pixmapPos.setY(option.margin);
 551
 552     // Center the hover rectangle horizontally and align it on bottom
 553     qreal hoverWidth = m_originalPixmapSize.width();
 554     qreal hoverHeight = m_originalPixmapSize.height();
 555     if (scaledIconHeight != m_pixmap.height()) {
 556         const qreal scaleFactor = qreal(scaledIconHeight) / qreal(m_pixmap.height());
 557         hoverWidth  *= scaleFactor;
 558         hoverHeight *= scaleFactor;
 559     }
 560     const qreal hoverX = m_pixmapPos.x() + (m_scaledPixmapSize.width() - hoverWidth) / 2.0;
 561     qreal hoverY = m_scaledPixmapSize.height() - hoverHeight;
 562     if (!iconOnTop) {
 563         hoverY /= 2.0;
 564     }
 565     hoverY += m_pixmapPos.y();
 566
 567     m_iconRect = QRectF(hoverX, hoverY, hoverWidth, hoverHeight);
 568     const qreal margin = option.margin;
 569     m_iconRect.adjust(-margin, -margin, margin, margin);
 570
 571     // Prepare the pixmap that is used when the item gets hovered
 572     if (isHovered()) {
 573         m_hoverPixmap = m_pixmap;
 574         KIconEffect* effect = KIconLoader::global()->iconEffect();
 575         // In the KIconLoader terminology, active = hover.
 576         if (effect->hasEffect(KIconLoader::Desktop, KIconLoader::ActiveState)) {
 577             m_hoverPixmap = effect->apply(m_pixmap, KIconLoader::Desktop, KIconLoader::ActiveState);
 578         } else {
 579             m_hoverPixmap = m_pixmap;
 580         }
 581     } else if (hoverOpacity() <= 0.0) {
 582         // No hover animation is ongoing. Clear m_hoverPixmap to save memory.
 583         m_hoverPixmap = QPixmap();
 584     }
 585 }
 586
 587 void KFileItemListWidget::updateTextsCache()
 588 {
 589     QTextOption textOption;
 590     switch (m_layout) {
 591     case IconsLayout:
 592         textOption.setWrapMode(QTextOption::WrapAtWordBoundaryOrAnywhere);
 593         textOption.setAlignment(Qt::AlignHCenter);
 594         break;
 595     case CompactLayout:
 596     case DetailsLayout:
 597         textOption.setAlignment(Qt::AlignLeft);
 598         textOption.setWrapMode(QTextOption::NoWrap);
 599         break;
 600     default:
 601         Q_ASSERT(false);
 602         break;
 603     }
 604
 605     for (int i = 0; i < TextIdCount; ++i) {
 606         m_text[i].setText(QString());
 607         m_text[i].setTextOption(textOption);
 608     }
 609
 610     switch (m_layout) {
 611     case IconsLayout:   updateIconsLayoutTextCache(); break;
 612     case CompactLayout: updateCompactLayoutTextCache(); break;
 613     case DetailsLayout: updateDetailsLayoutTextCache(); break;
 614     default: Q_ASSERT(false); break;
 615     }
 616 }
 617
 618 void KFileItemListWidget::updateIconsLayoutTextCache()
 619 {
 620     //      +------+
 621     //      | Icon |
 622     //      +------+
 623     //
 624     //    Name role that
 625     // might get wrapped above
 626     //    several lines.
 627     //  Additional role 1
 628     //  Additional role 2
 629
 630     const QHash<QByteArray, QVariant> values = data();
 631
 632     const KItemListStyleOption& option = styleOption();
 633     const qreal maxWidth = size().width() - 2 * option.margin;
 634     const qreal widgetHeight = size().height();
 635     const qreal fontHeight = option.fontMetrics.height();
 636
 637     // Initialize properties for the "name" role. It will be used as anchor
 638     // for initializing the position of the other roles.
 639     m_text[Name].setText(KStringHandler::preProcessWrap(values["name"].toString()));
 640
 641     // Calculate the number of lines required for the name and the required width
 642     int textLinesCountForName = 0;
 643     qreal requiredWidthForName = 0;
 644     QTextLine line;
 645
 646     QTextLayout layout(m_text[Name].text(), option.font);
 647     layout.setTextOption(m_text[Name].textOption());
 648     layout.beginLayout();
 649     while ((line = layout.createLine()).isValid()) {
 650         line.setLineWidth(maxWidth);
 651         requiredWidthForName = qMax(requiredWidthForName, line.naturalTextWidth());
 652         ++textLinesCountForName;
 653     }
 654     layout.endLayout();
 655
 656     // Use one line for each additional information
 657     int textLinesCount = textLinesCountForName;
 658     const int additionalRolesCount = qMax(visibleRoles().count() - 1, 0);
 659     textLinesCount += additionalRolesCount;
 660
 661     m_text[Name].setTextWidth(maxWidth);
 662     m_textPos[Name] = QPointF(option.margin, widgetHeight - textLinesCount * fontHeight - option.margin);
 663     m_textRect = QRectF(option.margin + (maxWidth - requiredWidthForName) / 2,
 664                         m_textPos[Name].y(),
 665                         requiredWidthForName,
 666                         textLinesCountForName * fontHeight);
 667
 668     // Calculate the position for each additional information
 669     qreal y = m_textPos[Name].y() + textLinesCountForName * fontHeight;
 670     foreach (const QByteArray& role, m_sortedVisibleRoles) {
 671         const TextId textId = roleTextId(role);
 672         if (textId == Name) {
 673             continue;
 674         }
 675
 676         const QString text = roleText(role, values);
 677         m_text[textId].setText(text);
 678
 679         qreal requiredWidth = 0;
 680
 681         QTextLayout layout(text, option.font);
 682         layout.setTextOption(m_text[textId].textOption());
 683         layout.beginLayout();
 684         QTextLine textLine = layout.createLine();
 685         if (textLine.isValid()) {
 686             textLine.setLineWidth(maxWidth);
 687             requiredWidth = textLine.naturalTextWidth();
 688             if (textLine.textLength() < text.length()) {
 689                 // TODO: QFontMetrics::elidedText() works different regarding the given width
 690                 // in comparison to QTextLine::setLineWidth(). It might happen that the text does
 691                 // not get elided although it does not fit into the given width. As workaround
 692                 // the margin is substracted.
 693                 const QString elidedText = option.fontMetrics.elidedText(text, Qt::ElideRight, maxWidth - option.margin);
 694                 m_text[textId].setText(elidedText);
 695             }
 696         }
 697         layout.endLayout();
 698
 699         m_textPos[textId] = QPointF(option.margin, y);
 700         m_text[textId].setTextWidth(maxWidth);
 701
 702         const QRectF textRect(option.margin + (maxWidth - requiredWidth) / 2, y, requiredWidth, fontHeight);
 703         m_textRect |= textRect;
 704
 705         y += fontHeight;
 706     }
 707
 708     // Add a margin to the text rectangle
 709     const qreal margin = option.margin;
 710     m_textRect.adjust(-margin, -margin, margin, margin);
 711 }
 712
 713 void KFileItemListWidget::updateCompactLayoutTextCache()
 714 {
 715     // +------+  Name role
 716     // | Icon |  Additional role 1
 717     // +------+  Additional role 2
 718
 719     const QHash<QByteArray, QVariant> values = data();
 720
 721     const KItemListStyleOption& option = styleOption();
 722     const qreal widgetHeight = size().height();
 723     const qreal fontHeight = option.fontMetrics.height();
 724     const qreal textLinesHeight = qMax(visibleRoles().count(), 1) * fontHeight;
 725     const int scaledIconSize = (textLinesHeight < option.iconSize) ? widgetHeight - 2 * option.margin : option.iconSize;
 726
 727     qreal maximumRequiredTextWidth = 0;
 728     const qreal x = option.margin * 3 + scaledIconSize;
 729     qreal y = (widgetHeight - textLinesHeight) / 2;
 730     const qreal maxWidth = size().width() - x - option.margin;
 731     foreach (const QByteArray& role, m_sortedVisibleRoles) {
 732         const TextId textId = roleTextId(role);
 733
 734         const QString text = roleText(role, values);
 735         m_text[textId].setText(text);
 736
 737         qreal requiredWidth = option.fontMetrics.width(text);
 738         if (requiredWidth > maxWidth) {
 739             requiredWidth = maxWidth;
 740             const QString elidedText = option.fontMetrics.elidedText(text, Qt::ElideRight, maxWidth);
 741             m_text[textId].setText(elidedText);
 742         }
 743
 744         m_textPos[textId] = QPointF(x, y);
 745         m_text[textId].setTextWidth(maxWidth);
 746
 747         maximumRequiredTextWidth = qMax(maximumRequiredTextWidth, requiredWidth);
 748
 749         y += fontHeight;
 750     }
 751
 752     m_textRect = QRectF(x - option.margin, 0, maximumRequiredTextWidth + 2 * option.margin, widgetHeight);
 753 }
 754
 755 void KFileItemListWidget::updateDetailsLayoutTextCache()
 756 {
 757     // Precondition: Requires already updated m_expansionArea
 758     // to determine the left position.
 759
 760     // +------+
 761     // | Icon |  Name role   Additional role 1   Additional role 2
 762     // +------+
 763     m_textRect = QRectF();
 764
 765     const KItemListStyleOption& option = styleOption();
 766     const QHash<QByteArray, QVariant> values = data();
 767
 768     const qreal widgetHeight = size().height();
 769     const int scaledIconSize = widgetHeight - 2 * option.margin;
 770     const int fontHeight = option.fontMetrics.height();
 771
 772     const qreal columnMargin = option.margin * 3;
 773     const qreal firstColumnInc = m_expansionArea.right() + option.margin * 2 + scaledIconSize;
 774     qreal x = firstColumnInc;
 775     const qreal y = qMax(qreal(option.margin), (widgetHeight - fontHeight) / 2);
 776
 777     foreach (const QByteArray& role, m_sortedVisibleRoles) {
 778         const TextId textId = roleTextId(role);
 779
 780         QString text = roleText(role, values);
 781
 782         // Elide the text in case it does not fit into the available column-width
 783         qreal requiredWidth = option.fontMetrics.width(text);
 784         const qreal columnWidth = visibleRolesSizes().value(role, QSizeF(0, 0)).width();
 785         qreal availableTextWidth = columnWidth - 2 * columnMargin;
 786         if (textId == Name) {
 787             availableTextWidth -= firstColumnInc;
 788         }
 789
 790         if (requiredWidth > availableTextWidth) {
 791             text = option.fontMetrics.elidedText(text, Qt::ElideRight, availableTextWidth);
 792             requiredWidth = option.fontMetrics.width(text);
 793         }
 794
 795         m_text[textId].setText(text);
 796         m_textPos[textId] = QPointF(x + columnMargin, y);
 797         x += columnWidth;
 798
 799         switch (textId) {
 800         case Name: {
 801             m_textRect = QRectF(m_textPos[textId].x() - option.margin, 0,
 802                                         requiredWidth + 2 * option.margin, size().height());
 803
 804             // The column after the name should always be aligned on the same x-position independent
 805             // from the expansion-level shown in the name column
 806             x -= firstColumnInc;
 807             break;
 808         }
 809         case Size:
 810             // The values for the size should be right aligned
 811             m_textPos[textId].rx() += columnWidth - requiredWidth - 2 * columnMargin;
 812             break;
 813
 814         default:
 815             break;
 816         }
 817     }
 818 }
 819
 820 void KFileItemListWidget::updateAdditionalInfoTextColor()
 821 {
 822     QColor c1;
 823     if (m_customTextColor.isValid()) {
 824         c1 = m_customTextColor;
 825     } else if (isSelected() && m_layout != DetailsLayout) {
 826         c1 = styleOption().palette.highlightedText().color();
 827     } else {
 828         c1 = styleOption().palette.text().color();
 829     }
 830
 831     // For the color of the additional info the inactive text color
 832     // is not used as this might lead to unreadable text for some color schemes. Instead
 833     // the text color c1 is slightly mixed with the background color.
 834     const QColor c2 = styleOption().palette.base().color();
 835     const int p1 = 70;
 836     const int p2 = 100 - p1;
 837     m_additionalInfoTextColor = QColor((c1.red()   * p1 + c2.red()   * p2) / 100,
 838                                        (c1.green() * p1 + c2.green() * p2) / 100,
 839                                        (c1.blue()  * p1 + c2.blue()  * p2) / 100);
 840 }
 841
 842 void KFileItemListWidget::drawPixmap(QPainter* painter, const QPixmap& pixmap)
 843 {
 844     if (m_scaledPixmapSize != pixmap.size()) {
 845         QPixmap scaledPixmap = pixmap;
 846         KPixmapModifier::scale(scaledPixmap, m_scaledPixmapSize);
 847         painter->drawPixmap(m_pixmapPos, scaledPixmap);
 848
 849 #ifdef KFILEITEMLISTWIDGET_DEBUG
 850         painter->setPen(Qt::blue);
 851         painter->drawRect(QRectF(m_pixmapPos, QSizeF(scaledPixmap.size())));
 852 #endif
 853     } else {
 854         painter->drawPixmap(m_pixmapPos, pixmap);
 855     }
 856 }
 857
 858 QPixmap KFileItemListWidget::pixmapForIcon(const QString& name, int size)
 859 {
 860     const KIcon icon(name);
 861
 862     int requestedSize;
 863     if (size <= KIconLoader::SizeSmall) {
 864         requestedSize = KIconLoader::SizeSmall;
 865     } else if (size <= KIconLoader::SizeSmallMedium) {
 866         requestedSize = KIconLoader::SizeSmallMedium;
 867     } else if (size <= KIconLoader::SizeMedium) {
 868         requestedSize = KIconLoader::SizeMedium;
 869     } else if (size <= KIconLoader::SizeLarge) {
 870         requestedSize = KIconLoader::SizeLarge;
 871     } else if (size <= KIconLoader::SizeHuge) {
 872         requestedSize = KIconLoader::SizeHuge;
 873     } else if (size <= KIconLoader::SizeEnormous) {
 874         requestedSize = KIconLoader::SizeEnormous;
 875     } else if (size <= KIconLoader::SizeEnormous * 2) {
 876         requestedSize = KIconLoader::SizeEnormous * 2;
 877     } else {
 878         requestedSize = size;
 879     }
 880
 881     QPixmap pixmap = icon.pixmap(requestedSize, requestedSize);
 882     if (requestedSize != size) {
 883         KPixmapModifier::scale(pixmap, QSize(size, size));
 884     }
 885
 886     return pixmap;
 887 }
 888
 889 KFileItemListWidget::TextId KFileItemListWidget::roleTextId(const QByteArray& role)
 890 {
 891     static QHash<QByteArray, TextId> rolesHash;
 892     if (rolesHash.isEmpty()) {
 893         rolesHash.insert("name", Name);
 894         rolesHash.insert("size", Size);
 895         rolesHash.insert("date", Date);
 896         rolesHash.insert("permissions", Permissions);
 897         rolesHash.insert("owner", Owner);
 898         rolesHash.insert("group", Group);
 899         rolesHash.insert("type", Type);
 900         rolesHash.insert("destination", Destination);
 901         rolesHash.insert("path", Path);
 902     }
 903
 904     return rolesHash.value(role);
 905 }
 906
 907 void KFileItemListWidget::applyCutEffect(QPixmap& pixmap)
 908 {
 909     KIconEffect* effect = KIconLoader::global()->iconEffect();
 910     pixmap = effect->apply(pixmap, KIconLoader::Desktop, KIconLoader::DisabledState);
 911 }
 912
 913 void KFileItemListWidget::applyHiddenEffect(QPixmap& pixmap)
 914 {
 915     KIconEffect::semiTransparent(pixmap);
 916 }
 917
 918 #include "kfileitemlistwidget.moc"