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) {
  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->setPen(Qt::red);
 151     painter->setBrush(Qt::NoBrush);
 152     painter->drawText(QPointF(0, itemListStyleOption.fontMetrics.height()), QString::number(index()));
 153     painter->drawRect(rect());
 154 #endif
 155 }
 156
 157 QRectF KFileItemListWidget::iconRect() const
 158 {
 159     const_cast<KFileItemListWidget*>(this)->triggerCacheRefreshing();
 160     return m_iconRect;
 161 }
 162
 163 QRectF KFileItemListWidget::textRect() const
 164 {
 165     const_cast<KFileItemListWidget*>(this)->triggerCacheRefreshing();
 166     return m_textRect;
 167 }
 168
 169 QRectF KFileItemListWidget::expansionToggleRect() const
 170 {
 171     const_cast<KFileItemListWidget*>(this)->triggerCacheRefreshing();
 172     return m_isExpandable ? m_expansionArea : QRectF();
 173 }
 174
 175 QRectF KFileItemListWidget::selectionToggleRect() const
 176 {
 177     const_cast<KFileItemListWidget*>(this)->triggerCacheRefreshing();
 178
 179     const int iconHeight = m_pixmap.height();
 180
 181     int toggleSize = KIconLoader::SizeSmall;
 182     if (iconHeight >= KIconLoader::SizeEnormous) {
 183         toggleSize = KIconLoader::SizeMedium;
 184     } else if (iconHeight >= KIconLoader::SizeLarge) {
 185         toggleSize = KIconLoader::SizeSmallMedium;
 186     }
 187
 188     QPointF pos = iconRect().topLeft();
 189
 190     // If the selection toggle has a very small distance to the
 191     // widget borders, the size of the selection toggle will get
 192     // increased to prevent an accidental clicking of the item
 193     // when trying to hit the toggle.
 194     const int widgetHeight = size().height();
 195     const int widgetWidth = size().width();
 196     const int minMargin = 2;
 197
 198     if (toggleSize + minMargin * 2 >= widgetHeight) {
 199         toggleSize = widgetHeight;
 200         pos.setY(0);
 201     }
 202     if (toggleSize + minMargin * 2 >= widgetWidth) {
 203         toggleSize = widgetWidth;
 204         pos.setX(0);
 205     }
 206
 207     return QRectF(pos, QSizeF(toggleSize, toggleSize));
 208 }
 209
 210 QString KFileItemListWidget::roleText(const QByteArray& role, const QHash<QByteArray, QVariant>& values)
 211 {
 212     QString text;
 213     const QVariant roleValue = values.value(role);
 214
 215     switch (roleTextId(role)) {
 216     case Name:
 217     case Permissions:
 218     case Owner:
 219     case Group:
 220     case Type:
 221     case Destination:
 222     case Path:
 223         text = roleValue.toString();
 224         break;
 225
 226     case Size: {
 227         if (values.value("isDir").toBool()) {
 228             // The item represents a directory. Show the number of sub directories
 229             // instead of the file size of the directory.
 230             if (roleValue.isNull()) {
 231                 text = i18nc("@item:intable", "Unknown");
 232             } else {
 233                 const KIO::filesize_t size = roleValue.value<KIO::filesize_t>();
 234                 text = i18ncp("@item:intable", "%1 item", "%1 items", size);
 235             }
 236         } else {
 237             // Show the size in kilobytes (always round up)
 238             const KLocale* locale = KGlobal::locale();
 239             const int roundInc = (locale->binaryUnitDialect() == KLocale::MetricBinaryDialect) ? 499 : 511;
 240             const KIO::filesize_t size = roleValue.value<KIO::filesize_t>() + roundInc;
 241             text = locale->formatByteSize(size, 0, KLocale::DefaultBinaryDialect, KLocale::UnitKiloByte);
 242         }
 243         break;
 244     }
 245
 246     case Date: {
 247         const QDateTime dateTime = roleValue.toDateTime();
 248         text = KGlobal::locale()->formatDateTime(dateTime);
 249         break;
 250     }
 251
 252     default:
 253         Q_ASSERT(false);
 254         break;
 255     }
 256
 257     return text;
 258 }
 259
 260 void KFileItemListWidget::invalidateCache()
 261 {
 262     m_dirtyLayout = true;
 263     m_dirtyContent = true;
 264 }
 265
 266 void KFileItemListWidget::refreshCache()
 267 {
 268 }
 269
 270 void KFileItemListWidget::setTextColor(const QColor& color)
 271 {
 272     if (color != m_customTextColor) {
 273         m_customTextColor = color;
 274         updateAdditionalInfoTextColor();
 275         update();
 276     }
 277 }
 278
 279 QColor KFileItemListWidget::textColor() const
 280 {
 281     if (m_customTextColor.isValid() && !isSelected()) {
 282         return m_customTextColor;
 283     }
 284
 285     const QPalette::ColorGroup group = isActiveWindow() ? QPalette::Active : QPalette::Inactive;
 286     const QPalette::ColorRole role = isSelected() ? QPalette::HighlightedText : QPalette::Text;
 287     return styleOption().palette.brush(group, role).color();
 288 }
 289
 290 void KFileItemListWidget::setOverlay(const QPixmap& overlay)
 291 {
 292     m_overlay = overlay;
 293     m_dirtyContent = true;
 294     update();
 295 }
 296
 297 QPixmap KFileItemListWidget::overlay() const
 298 {
 299     return m_overlay;
 300 }
 301
 302 void KFileItemListWidget::dataChanged(const QHash<QByteArray, QVariant>& current,
 303                                       const QSet<QByteArray>& roles)
 304 {
 305     KItemListWidget::dataChanged(current, roles);
 306     m_dirtyContent = true;
 307
 308     QSet<QByteArray> dirtyRoles;
 309     if (roles.isEmpty()) {
 310         dirtyRoles = visibleRoles().toSet();
 311         dirtyRoles.insert("iconPixmap");
 312         dirtyRoles.insert("iconName");
 313     } else {
 314         dirtyRoles = roles;
 315     }
 316
 317     QSetIterator<QByteArray> it(dirtyRoles);
 318     while (it.hasNext()) {
 319         const QByteArray& role = it.next();
 320         m_dirtyContentRoles.insert(role);
 321     }
 322 }
 323
 324 void KFileItemListWidget::visibleRolesChanged(const QList<QByteArray>& current,
 325                                               const QList<QByteArray>& previous)
 326 {
 327     KItemListWidget::visibleRolesChanged(current, previous);
 328     m_sortedVisibleRoles = current;
 329     m_dirtyLayout = true;
 330 }
 331
 332 void KFileItemListWidget::visibleRolesSizesChanged(const QHash<QByteArray, QSizeF>& current,
 333                                                    const QHash<QByteArray, QSizeF>& previous)
 334 {
 335     KItemListWidget::visibleRolesSizesChanged(current, previous);
 336     m_dirtyLayout = true;
 337 }
 338
 339 void KFileItemListWidget::styleOptionChanged(const KItemListStyleOption& current,
 340                                              const KItemListStyleOption& previous)
 341 {
 342     KItemListWidget::styleOptionChanged(current, previous);
 343     updateAdditionalInfoTextColor();
 344     m_dirtyLayout = true;
 345 }
 346
 347 void KFileItemListWidget::hoveredChanged(bool hovered)
 348 {
 349     Q_UNUSED(hovered);
 350     m_dirtyLayout = true;
 351 }
 352
 353 void KFileItemListWidget::selectedChanged(bool selected)
 354 {
 355     Q_UNUSED(selected);
 356     updateAdditionalInfoTextColor();
 357 }
 358
 359 void KFileItemListWidget::resizeEvent(QGraphicsSceneResizeEvent* event)
 360 {
 361     KItemListWidget::resizeEvent(event);
 362     m_dirtyLayout = true;
 363 }
 364
 365 void KFileItemListWidget::showEvent(QShowEvent* event)
 366 {
 367     KItemListWidget::showEvent(event);
 368
 369     // Listen to changes of the clipboard to mark the item as cut/uncut
 370     KFileItemClipboard* clipboard = KFileItemClipboard::instance();
 371
 372     const KUrl itemUrl = data().value("url").value<KUrl>();
 373     m_isCut = clipboard->isCut(itemUrl);
 374
 375     connect(clipboard, SIGNAL(cutItemsChanged()),
 376             this, SLOT(slotCutItemsChanged()));
 377 }
 378
 379 void KFileItemListWidget::hideEvent(QHideEvent* event)
 380 {
 381     disconnect(KFileItemClipboard::instance(), SIGNAL(cutItemsChanged()),
 382                this, SLOT(slotCutItemsChanged()));
 383
 384     KItemListWidget::hideEvent(event);
 385 }
 386
 387 void KFileItemListWidget::slotCutItemsChanged()
 388 {
 389     const KUrl itemUrl = data().value("url").value<KUrl>();
 390     const bool isCut = KFileItemClipboard::instance()->isCut(itemUrl);
 391     if (m_isCut != isCut) {
 392         m_isCut = isCut;
 393         m_pixmap = QPixmap();
 394         m_dirtyContent = true;
 395         update();
 396     }
 397 }
 398
 399 void KFileItemListWidget::triggerCacheRefreshing()
 400 {
 401     if ((!m_dirtyContent && !m_dirtyLayout) || index() < 0) {
 402         return;
 403     }
 404
 405     refreshCache();
 406
 407     const QHash<QByteArray, QVariant> values = data();
 408     m_isExpandable = values["isExpandable"].toBool();
 409     m_isHidden = values["name"].toString().startsWith(QLatin1Char('.'));
 410
 411     updateExpansionArea();
 412     updateTextsCache();
 413     updatePixmapCache();
 414
 415     m_dirtyLayout = false;
 416     m_dirtyContent = false;
 417     m_dirtyContentRoles.clear();
 418 }
 419
 420 void KFileItemListWidget::updateExpansionArea()
 421 {
 422     if (m_layout == DetailsLayout) {
 423         const QHash<QByteArray, QVariant> values = data();
 424         Q_ASSERT(values.contains("expansionLevel"));
 425         const KItemListStyleOption& option = styleOption();
 426         const int expansionLevel = values.value("expansionLevel", 0).toInt();
 427         if (expansionLevel >= 0) {
 428             const qreal widgetHeight = size().height();
 429             const qreal expansionLevelSize = KIconLoader::SizeSmall;
 430             const qreal x = option.margin + expansionLevel * widgetHeight;
 431             const qreal y = (widgetHeight - expansionLevelSize) / 2;
 432             m_expansionArea = QRectF(x, y, expansionLevelSize, expansionLevelSize);
 433             return;
 434         }
 435     }
 436
 437     m_expansionArea = QRectF();
 438 }
 439
 440 void KFileItemListWidget::updatePixmapCache()
 441 {
 442     // Precondition: Requires already updated m_textPos values to calculate
 443     // the remaining height when the alignment is vertical.
 444
 445     const bool iconOnTop = (m_layout == IconsLayout);
 446     const KItemListStyleOption& option = styleOption();
 447     const int iconHeight = option.iconSize;
 448
 449     const QHash<QByteArray, QVariant> values = data();
 450     const QSizeF widgetSize = size();
 451
 452     int scaledIconHeight = 0;
 453     if (iconOnTop) {
 454         scaledIconHeight = static_cast<int>(m_textPos[Name].y() - 3 * option.margin);
 455     } else {
 456         const int textRowsCount = (m_layout == CompactLayout) ? visibleRoles().count() : 1;
 457         const qreal requiredTextHeight = textRowsCount * option.fontMetrics.height();
 458         scaledIconHeight = (requiredTextHeight < iconHeight) ? widgetSize.height() - 2 * option.margin : iconHeight;
 459     }
 460
 461     bool updatePixmap = (iconHeight != m_pixmap.height());
 462     if (!updatePixmap && m_dirtyContent) {
 463         updatePixmap = m_dirtyContentRoles.isEmpty()
 464                        || m_dirtyContentRoles.contains("iconPixmap")
 465                        || m_dirtyContentRoles.contains("iconName")
 466                        || m_dirtyContentRoles.contains("iconOverlays");
 467     }
 468
 469     if (updatePixmap) {
 470         m_pixmap = values["iconPixmap"].value<QPixmap>();
 471         if (m_pixmap.isNull()) {
 472             // Use the icon that fits to the MIME-type
 473             QString iconName = values["iconName"].toString();
 474             if (iconName.isEmpty()) {
 475                 // The icon-name has not been not resolved by KFileItemModelRolesUpdater,
 476                 // use a generic icon as fallback
 477                 iconName = QLatin1String("unknown");
 478             }
 479             m_pixmap = pixmapForIcon(iconName, iconHeight);
 480             m_originalPixmapSize = m_pixmap.size();
 481         } else if (m_pixmap.size() != QSize(iconHeight, iconHeight)) {
 482             // A custom pixmap has been applied. Assure that the pixmap
 483             // is scaled to the available size.
 484             const bool scale = m_pixmap.width() > iconHeight || m_pixmap.height() > iconHeight ||
 485                                (m_pixmap.width() < iconHeight && m_pixmap.height() < iconHeight);
 486             if (scale) {
 487                 KPixmapModifier::scale(m_pixmap, QSize(iconHeight, iconHeight));
 488             }
 489             m_originalPixmapSize = m_pixmap.size();
 490
 491             // To simplify the handling of scaling the original pixmap
 492             // will be embedded into a square pixmap.
 493             QPixmap squarePixmap(iconHeight, iconHeight);
 494             squarePixmap.fill(Qt::transparent);
 495
 496             QPainter painter(&squarePixmap);
 497             int x, y;
 498             if (iconOnTop) {
 499                 x = (iconHeight - m_pixmap.width()) / 2;  // Center horizontally
 500                 y = iconHeight - m_pixmap.height();       // Align on bottom
 501                 painter.drawPixmap(x, y, m_pixmap);
 502             } else {
 503                 x = iconHeight - m_pixmap.width();        // Align right
 504                 y = (iconHeight - m_pixmap.height()) / 2; // Center vertically
 505                 painter.drawPixmap(x, y, m_pixmap);
 506             }
 507
 508             m_pixmap = squarePixmap;
 509         } else {
 510             m_originalPixmapSize = m_pixmap.size();
 511         }
 512
 513         const QStringList overlays = values["iconOverlays"].toStringList();
 514
 515         // Strangely KFileItem::overlays() returns empty string-values, so
 516         // we need to check first whether an overlay must be drawn at all.
 517         // It is more efficient to do it here, as KIconLoader::drawOverlays()
 518         // assumes that an overlay will be drawn and has some additional
 519         // setup time.
 520         foreach (const QString& overlay, overlays) {
 521             if (!overlay.isEmpty()) {
 522                 // There is at least one overlay, draw all overlays above m_pixmap
 523                 // and cancel the check
 524                 KIconLoader::global()->drawOverlays(overlays, m_pixmap, KIconLoader::Desktop);
 525                 break;
 526             }
 527         }
 528
 529         if (m_isCut) {
 530             applyCutEffect(m_pixmap);
 531         }
 532
 533         if (m_isHidden) {
 534             applyHiddenEffect(m_pixmap);
 535         }
 536
 537         Q_ASSERT(m_pixmap.height() == iconHeight);
 538     }
 539     if (!m_overlay.isNull()) {
 540         QPainter painter(&m_pixmap);
 541         painter.drawPixmap(0, m_pixmap.height() - m_overlay.height(), m_overlay);
 542     }
 543
 544     m_scaledPixmapSize = QSize(scaledIconHeight, scaledIconHeight);
 545
 546     if (iconOnTop) {
 547         m_pixmapPos.setX((widgetSize.width() - m_scaledPixmapSize.width()) / 2);
 548     } else {
 549         m_pixmapPos.setX(m_textPos[Name].x() - 2 * option.margin - scaledIconHeight);
 550     }
 551     m_pixmapPos.setY(option.margin);
 552
 553     // Center the hover rectangle horizontally and align it on bottom
 554     qreal hoverWidth = m_originalPixmapSize.width();
 555     qreal hoverHeight = m_originalPixmapSize.height();
 556     if (scaledIconHeight != m_pixmap.height()) {
 557         const qreal scaleFactor = qreal(scaledIconHeight) / qreal(m_pixmap.height());
 558         hoverWidth  *= scaleFactor;
 559         hoverHeight *= scaleFactor;
 560     }
 561     const qreal hoverX = m_pixmapPos.x() + (m_scaledPixmapSize.width() - hoverWidth) / 2.0;
 562     const qreal hoverY = m_pixmapPos.y() + m_scaledPixmapSize.height() - hoverHeight;
 563     m_iconRect = QRectF(hoverX, hoverY, hoverWidth, hoverHeight);
 564     const qreal margin = option.margin;
 565     m_iconRect.adjust(-margin, -margin, margin, margin);
 566
 567     // Prepare the pixmap that is used when the item gets hovered
 568     if (isHovered()) {
 569         m_hoverPixmap = m_pixmap;
 570         KIconEffect* effect = KIconLoader::global()->iconEffect();
 571         // In the KIconLoader terminology, active = hover.
 572         if (effect->hasEffect(KIconLoader::Desktop, KIconLoader::ActiveState)) {
 573             m_hoverPixmap = effect->apply(m_pixmap, KIconLoader::Desktop, KIconLoader::ActiveState);
 574         } else {
 575             m_hoverPixmap = m_pixmap;
 576         }
 577     } else if (hoverOpacity() <= 0.0) {
 578         // No hover animation is ongoing. Clear m_hoverPixmap to save memory.
 579         m_hoverPixmap = QPixmap();
 580     }
 581 }
 582
 583 void KFileItemListWidget::updateTextsCache()
 584 {
 585     QTextOption textOption;
 586     switch (m_layout) {
 587     case IconsLayout:
 588         textOption.setWrapMode(QTextOption::WrapAtWordBoundaryOrAnywhere);
 589         textOption.setAlignment(Qt::AlignHCenter);
 590         break;
 591     case CompactLayout:
 592     case DetailsLayout:
 593         textOption.setAlignment(Qt::AlignLeft);
 594         textOption.setWrapMode(QTextOption::NoWrap);
 595         break;
 596     default:
 597         Q_ASSERT(false);
 598         break;
 599     }
 600
 601     for (int i = 0; i < TextIdCount; ++i) {
 602         m_text[i].setText(QString());
 603         m_text[i].setTextOption(textOption);
 604     }
 605
 606     switch (m_layout) {
 607     case IconsLayout:   updateIconsLayoutTextCache(); break;
 608     case CompactLayout: updateCompactLayoutTextCache(); break;
 609     case DetailsLayout: updateDetailsLayoutTextCache(); break;
 610     default: Q_ASSERT(false); break;
 611     }
 612 }
 613
 614 void KFileItemListWidget::updateIconsLayoutTextCache()
 615 {
 616     //      +------+
 617     //      | Icon |
 618     //      +------+
 619     //
 620     //    Name role that
 621     // might get wrapped above
 622     //    several lines.
 623     //  Additional role 1
 624     //  Additional role 2
 625
 626     const QHash<QByteArray, QVariant> values = data();
 627
 628     const KItemListStyleOption& option = styleOption();
 629     const qreal maxWidth = size().width() - 2 * option.margin;
 630     const qreal widgetHeight = size().height();
 631     const qreal fontHeight = option.fontMetrics.height();
 632
 633     // Initialize properties for the "name" role. It will be used as anchor
 634     // for initializing the position of the other roles.
 635     m_text[Name].setText(KStringHandler::preProcessWrap(values["name"].toString()));
 636
 637     // Calculate the number of lines required for the name and the required width
 638     int textLinesCountForName = 0;
 639     qreal requiredWidthForName = 0;
 640     QTextLine line;
 641
 642     QTextLayout layout(m_text[Name].text(), option.font);
 643     layout.setTextOption(m_text[Name].textOption());
 644     layout.beginLayout();
 645     while ((line = layout.createLine()).isValid()) {
 646         line.setLineWidth(maxWidth);
 647         requiredWidthForName = qMax(requiredWidthForName, line.naturalTextWidth());
 648         ++textLinesCountForName;
 649     }
 650     layout.endLayout();
 651
 652     // Use one line for each additional information
 653     int textLinesCount = textLinesCountForName;
 654     const int additionalRolesCount = qMax(visibleRoles().count() - 1, 0);
 655     textLinesCount += additionalRolesCount;
 656
 657     m_text[Name].setTextWidth(maxWidth);
 658     m_textPos[Name] = QPointF(option.margin, widgetHeight - textLinesCount * fontHeight - option.margin);
 659     m_textRect = QRectF(option.margin + (maxWidth - requiredWidthForName) / 2,
 660                         m_textPos[Name].y(),
 661                         requiredWidthForName,
 662                         textLinesCountForName * fontHeight);
 663
 664     // Calculate the position for each additional information
 665     qreal y = m_textPos[Name].y() + textLinesCountForName * fontHeight;
 666     foreach (const QByteArray& role, m_sortedVisibleRoles) {
 667         const TextId textId = roleTextId(role);
 668         if (textId == Name) {
 669             continue;
 670         }
 671
 672         const QString text = roleText(role, values);
 673         m_text[textId].setText(text);
 674
 675         qreal requiredWidth = 0;
 676
 677         QTextLayout layout(text, option.font);
 678         layout.setTextOption(m_text[textId].textOption());
 679         layout.beginLayout();
 680         QTextLine textLine = layout.createLine();
 681         if (textLine.isValid()) {
 682             textLine.setLineWidth(maxWidth);
 683             requiredWidth = textLine.naturalTextWidth();
 684             if (textLine.textLength() < text.length()) {
 685                 // TODO: QFontMetrics::elidedText() works different regarding the given width
 686                 // in comparison to QTextLine::setLineWidth(). It might happen that the text does
 687                 // not get elided although it does not fit into the given width. As workaround
 688                 // the margin is substracted.
 689                 const QString elidedText = option.fontMetrics.elidedText(text, Qt::ElideRight, maxWidth - option.margin);
 690                 m_text[textId].setText(elidedText);
 691             }
 692         }
 693         layout.endLayout();
 694
 695         m_textPos[textId] = QPointF(option.margin, y);
 696         m_text[textId].setTextWidth(maxWidth);
 697
 698         const QRectF textRect(option.margin + (maxWidth - requiredWidth) / 2, y, requiredWidth, fontHeight);
 699         m_textRect |= textRect;
 700
 701         y += fontHeight;
 702     }
 703
 704     // Add a margin to the text rectangle
 705     const qreal margin = option.margin;
 706     m_textRect.adjust(-margin, -margin, margin, margin);
 707 }
 708
 709 void KFileItemListWidget::updateCompactLayoutTextCache()
 710 {
 711     // +------+  Name role
 712     // | Icon |  Additional role 1
 713     // +------+  Additional role 2
 714
 715     const QHash<QByteArray, QVariant> values = data();
 716
 717     const KItemListStyleOption& option = styleOption();
 718     const qreal widgetHeight = size().height();
 719     const qreal fontHeight = option.fontMetrics.height();
 720     const qreal textLinesHeight = qMax(visibleRoles().count(), 1) * fontHeight;
 721     const int scaledIconSize = (textLinesHeight < option.iconSize) ? widgetHeight - 2 * option.margin : option.iconSize;
 722
 723     qreal maximumRequiredTextWidth = 0;
 724     const qreal x = option.margin * 3 + scaledIconSize;
 725     qreal y = (widgetHeight - textLinesHeight) / 2;
 726     const qreal maxWidth = size().width() - x - option.margin;
 727     foreach (const QByteArray& role, m_sortedVisibleRoles) {
 728         const TextId textId = roleTextId(role);
 729
 730         const QString text = roleText(role, values);
 731         m_text[textId].setText(text);
 732
 733         qreal requiredWidth = option.fontMetrics.width(text);
 734         if (requiredWidth > maxWidth) {
 735             requiredWidth = maxWidth;
 736             const QString elidedText = option.fontMetrics.elidedText(text, Qt::ElideRight, maxWidth);
 737             m_text[textId].setText(elidedText);
 738         }
 739
 740         m_textPos[textId] = QPointF(x, y);
 741         m_text[textId].setTextWidth(maxWidth);
 742
 743         maximumRequiredTextWidth = qMax(maximumRequiredTextWidth, requiredWidth);
 744
 745         y += fontHeight;
 746     }
 747
 748     m_textRect = QRectF(x - option.margin, 0, maximumRequiredTextWidth + 2 * option.margin, widgetHeight);
 749 }
 750
 751 void KFileItemListWidget::updateDetailsLayoutTextCache()
 752 {
 753     // Precondition: Requires already updated m_expansionArea
 754     // to determine the left position.
 755
 756     // +------+
 757     // | Icon |  Name role   Additional role 1   Additional role 2
 758     // +------+
 759     m_textRect = QRectF();
 760
 761     const KItemListStyleOption& option = styleOption();
 762     const QHash<QByteArray, QVariant> values = data();
 763
 764     const qreal widgetHeight = size().height();
 765     const int scaledIconSize = widgetHeight - 2 * option.margin;
 766     const int fontHeight = option.fontMetrics.height();
 767
 768     const qreal columnMargin = option.margin * 3;
 769     const qreal firstColumnInc = m_expansionArea.right() + option.margin * 2 + scaledIconSize;
 770     qreal x = firstColumnInc;
 771     const qreal y = qMax(qreal(option.margin), (widgetHeight - fontHeight) / 2);
 772
 773     foreach (const QByteArray& role, m_sortedVisibleRoles) {
 774         const TextId textId = roleTextId(role);
 775
 776         QString text = roleText(role, values);
 777
 778         // Elide the text in case it does not fit into the available column-width
 779         qreal requiredWidth = option.fontMetrics.width(text);
 780         const qreal columnWidth = visibleRolesSizes().value(role, QSizeF(0, 0)).width();
 781         qreal availableTextWidth = columnWidth - 2 * columnMargin;
 782         if (textId == Name) {
 783             availableTextWidth -= firstColumnInc;
 784         }
 785
 786         if (requiredWidth > availableTextWidth) {
 787             text = option.fontMetrics.elidedText(text, Qt::ElideRight, availableTextWidth);
 788             requiredWidth = option.fontMetrics.width(text);
 789         }
 790
 791         m_text[textId].setText(text);
 792         m_textPos[textId] = QPointF(x + columnMargin, y);
 793         x += columnWidth;
 794
 795         switch (textId) {
 796         case Name: {
 797             m_textRect = QRectF(m_textPos[textId].x() - option.margin, 0,
 798                                         requiredWidth + 2 * option.margin, size().height());
 799
 800             // The column after the name should always be aligned on the same x-position independent
 801             // from the expansion-level shown in the name column
 802             x -= firstColumnInc;
 803             break;
 804         }
 805         case Size:
 806             // The values for the size should be right aligned
 807             m_textPos[textId].rx() += columnWidth - requiredWidth - 2 * columnMargin;
 808             break;
 809
 810         default:
 811             break;
 812         }
 813     }
 814 }
 815
 816 void KFileItemListWidget::updateAdditionalInfoTextColor()
 817 {
 818     QColor c1;
 819     if (m_customTextColor.isValid()) {
 820         c1 = m_customTextColor;
 821     } else if (isSelected() && m_layout != DetailsLayout) {
 822         c1 = styleOption().palette.highlightedText().color();
 823     } else {
 824         c1 = styleOption().palette.text().color();
 825     }
 826
 827     // For the color of the additional info the inactive text color
 828     // is not used as this might lead to unreadable text for some color schemes. Instead
 829     // the text color c1 is slightly mixed with the background color.
 830     const QColor c2 = styleOption().palette.base().color();
 831     const int p1 = 70;
 832     const int p2 = 100 - p1;
 833     m_additionalInfoTextColor = QColor((c1.red()   * p1 + c2.red()   * p2) / 100,
 834                                        (c1.green() * p1 + c2.green() * p2) / 100,
 835                                        (c1.blue()  * p1 + c2.blue()  * p2) / 100);
 836 }
 837
 838 void KFileItemListWidget::drawPixmap(QPainter* painter, const QPixmap& pixmap)
 839 {
 840     if (m_scaledPixmapSize != pixmap.size()) {
 841         QPixmap scaledPixmap = pixmap;
 842         KPixmapModifier::scale(scaledPixmap, m_scaledPixmapSize);
 843         painter->drawPixmap(m_pixmapPos, scaledPixmap);
 844
 845 #ifdef KFILEITEMLISTWIDGET_DEBUG
 846         painter->setPen(Qt::green);
 847         painter->drawRect(QRectF(m_pixmapPos, QSizeF(scaledPixmap.size())));
 848 #endif
 849     } else {
 850         painter->drawPixmap(m_pixmapPos, pixmap);
 851     }
 852 }
 853
 854 QPixmap KFileItemListWidget::pixmapForIcon(const QString& name, int size)
 855 {
 856     const KIcon icon(name);
 857
 858     int requestedSize;
 859     if (size <= KIconLoader::SizeSmall) {
 860         requestedSize = KIconLoader::SizeSmall;
 861     } else if (size <= KIconLoader::SizeSmallMedium) {
 862         requestedSize = KIconLoader::SizeSmallMedium;
 863     } else if (size <= KIconLoader::SizeMedium) {
 864         requestedSize = KIconLoader::SizeMedium;
 865     } else if (size <= KIconLoader::SizeLarge) {
 866         requestedSize = KIconLoader::SizeLarge;
 867     } else if (size <= KIconLoader::SizeHuge) {
 868         requestedSize = KIconLoader::SizeHuge;
 869     } else if (size <= KIconLoader::SizeEnormous) {
 870         requestedSize = KIconLoader::SizeEnormous;
 871     } else if (size <= KIconLoader::SizeEnormous * 2) {
 872         requestedSize = KIconLoader::SizeEnormous * 2;
 873     } else {
 874         requestedSize = size;
 875     }
 876
 877     QPixmap pixmap = icon.pixmap(requestedSize, requestedSize);
 878     if (requestedSize != size) {
 879         KPixmapModifier::scale(pixmap, QSize(size, size));
 880     }
 881
 882     return pixmap;
 883 }
 884
 885 KFileItemListWidget::TextId KFileItemListWidget::roleTextId(const QByteArray& role)
 886 {
 887     static QHash<QByteArray, TextId> rolesHash;
 888     if (rolesHash.isEmpty()) {
 889         rolesHash.insert("name", Name);
 890         rolesHash.insert("size", Size);
 891         rolesHash.insert("date", Date);
 892         rolesHash.insert("permissions", Permissions);
 893         rolesHash.insert("owner", Owner);
 894         rolesHash.insert("group", Group);
 895         rolesHash.insert("type", Type);
 896         rolesHash.insert("destination", Destination);
 897         rolesHash.insert("path", Path);
 898     }
 899
 900     return rolesHash.value(role);
 901 }
 902
 903 void KFileItemListWidget::applyCutEffect(QPixmap& pixmap)
 904 {
 905     KIconEffect* effect = KIconLoader::global()->iconEffect();
 906     pixmap = effect->apply(pixmap, KIconLoader::Desktop, KIconLoader::DisabledState);
 907 }
 908
 909 void KFileItemListWidget::applyHiddenEffect(QPixmap& pixmap)
 910 {
 911     KIconEffect::semiTransparent(pixmap);
 912 }
 913
 914 #include "kfileitemlistwidget.moc"