src/kitemviews/kstandarditemlistwidget.cpp

   1 /***************************************************************************
   2  *   Copyright (C) 2012 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 "kstandarditemlistwidget.h"
  21
  22 #include "kfileitemlistview.h"
  23 #include "kfileitemmodel.h"
  24
  25 #include <QIcon>
  26 #include <KIconEffect>
  27 #include <KIconLoader>
  28 #include <KRatingPainter>
  29 #include <KStringHandler>
  30
  31 #include "private/kfileitemclipboard.h"
  32 #include "private/kitemlistroleeditor.h"
  33 #include "private/kpixmapmodifier.h"
  34
  35 #include <QGraphicsScene>
  36 #include <QGraphicsSceneResizeEvent>
  37 #include <QGraphicsView>
  38 #include <QPainter>
  39 #include <QStyleOption>
  40 #include <QTextLayout>
  41 #include <QTextLine>
  42 #include <QPixmapCache>
  43
  44 // #define KSTANDARDITEMLISTWIDGET_DEBUG
  45
  46 KStandardItemListWidgetInformant::KStandardItemListWidgetInformant() :
  47     KItemListWidgetInformant()
  48 {
  49 }
  50
  51 KStandardItemListWidgetInformant::~KStandardItemListWidgetInformant()
  52 {
  53 }
  54
  55 void KStandardItemListWidgetInformant::calculateItemSizeHints(QVector<qreal>& logicalHeightHints, qreal& logicalWidthHint, const KItemListView* view) const
  56 {
  57     switch (static_cast<const KStandardItemListView*>(view)->itemLayout()) {
  58     case KStandardItemListWidget::IconsLayout:
  59         calculateIconsLayoutItemSizeHints(logicalHeightHints, logicalWidthHint, view);
  60         break;
  61
  62     case KStandardItemListWidget::CompactLayout:
  63         calculateCompactLayoutItemSizeHints(logicalHeightHints, logicalWidthHint, view);
  64         break;
  65
  66     case KStandardItemListWidget::DetailsLayout:
  67         calculateDetailsLayoutItemSizeHints(logicalHeightHints, logicalWidthHint, view);
  68         break;
  69
  70     default:
  71         Q_ASSERT(false);
  72         break;
  73     }
  74 }
  75
  76 qreal KStandardItemListWidgetInformant::preferredRoleColumnWidth(const QByteArray& role,
  77                                                                  int index,
  78                                                                  const KItemListView* view) const
  79 {
  80     const QHash<QByteArray, QVariant> values = view->model()->data(index);
  81     const KItemListStyleOption& option = view->styleOption();
  82
  83     const QString text = roleText(role, values);
  84     qreal width = KStandardItemListWidget::columnPadding(option);
  85
  86     const QFontMetrics& normalFontMetrics = option.fontMetrics;
  87     const QFontMetrics linkFontMetrics(customizedFontForLinks(option.font));
  88
  89     if (role == "rating") {
  90         width += KStandardItemListWidget::preferredRatingSize(option).width();
  91     } else {
  92         // If current item is a link, we use the customized link font metrics instead of the normal font metrics.
  93         const QFontMetrics& fontMetrics = itemIsLink(index, view) ? linkFontMetrics : normalFontMetrics;
  94
  95         width += fontMetrics.width(text);
  96
  97         if (role == "text") {
  98             if (view->supportsItemExpanding()) {
  99                 // Increase the width by the expansion-toggle and the current expansion level
 100                 const int expandedParentsCount = values.value("expandedParentsCount", 0).toInt();
 101                 const qreal height = option.padding * 2 + qMax(option.iconSize, fontMetrics.height());
 102                 width += (expandedParentsCount + 1) * height;
 103             }
 104
 105             // Increase the width by the required space for the icon
 106             width += option.padding * 2 + option.iconSize;
 107         }
 108     }
 109
 110     return width;
 111 }
 112
 113 QString KStandardItemListWidgetInformant::itemText(int index, const KItemListView* view) const
 114 {
 115     return view->model()->data(index).value("text").toString();
 116 }
 117
 118 bool KStandardItemListWidgetInformant::itemIsLink(int index, const KItemListView* view) const
 119 {
 120     Q_UNUSED(index);
 121     Q_UNUSED(view);
 122     return false;
 123 }
 124
 125 QString KStandardItemListWidgetInformant::roleText(const QByteArray& role,
 126                                                    const QHash<QByteArray, QVariant>& values) const
 127 {
 128     if (role == "rating") {
 129         // Always use an empty text, as the rating is shown by the image m_rating.
 130         return QString();
 131     }
 132     return values.value(role).toString();
 133 }
 134
 135 QFont KStandardItemListWidgetInformant::customizedFontForLinks(const QFont& baseFont) const
 136 {
 137     return baseFont;
 138 }
 139
 140 void KStandardItemListWidgetInformant::calculateIconsLayoutItemSizeHints(QVector<qreal>& logicalHeightHints, qreal& logicalWidthHint, const KItemListView* view) const
 141 {
 142     const KItemListStyleOption& option = view->styleOption();
 143     const QFont& normalFont = option.font;
 144     const int additionalRolesCount = qMax(view->visibleRoles().count() - 1, 0);
 145
 146     const qreal itemWidth = view->itemSize().width();
 147     const qreal maxWidth = itemWidth - 2 * option.padding;
 148     const qreal additionalRolesSpacing = additionalRolesCount * option.fontMetrics.lineSpacing();
 149     const qreal spacingAndIconHeight = option.iconSize + option.padding * 3;
 150
 151     const QFont linkFont = customizedFontForLinks(normalFont);
 152
 153     QTextOption textOption(Qt::AlignHCenter);
 154     textOption.setWrapMode(QTextOption::WrapAtWordBoundaryOrAnywhere);
 155
 156     for (int index = 0; index < logicalHeightHints.count(); ++index) {
 157         if (logicalHeightHints.at(index) > 0.0) {
 158             continue;
 159         }
 160
 161         // If the current item is a link, we use the customized link font instead of the normal font.
 162         const QFont& font = itemIsLink(index, view) ? linkFont : normalFont;
 163
 164         const QString& text = KStringHandler::preProcessWrap(itemText(index, view));
 165
 166         // Calculate the number of lines required for wrapping the name
 167         qreal textHeight = 0;
 168         QTextLayout layout(text, font);
 169         layout.setTextOption(textOption);
 170         layout.beginLayout();
 171         QTextLine line;
 172         int lineCount = 0;
 173         while ((line = layout.createLine()).isValid()) {
 174             line.setLineWidth(maxWidth);
 175             line.naturalTextWidth();
 176             textHeight += line.height();
 177
 178             ++lineCount;
 179             if (lineCount == option.maxTextLines) {
 180                 break;
 181             }
 182         }
 183         layout.endLayout();
 184
 185         // Add one line for each additional information
 186         textHeight += additionalRolesSpacing;
 187
 188         logicalHeightHints[index] = textHeight + spacingAndIconHeight;
 189     }
 190
 191     logicalWidthHint = itemWidth;
 192 }
 193
 194 void KStandardItemListWidgetInformant::calculateCompactLayoutItemSizeHints(QVector<qreal>& logicalHeightHints, qreal& logicalWidthHint, const KItemListView* view) const
 195 {
 196     const KItemListStyleOption& option = view->styleOption();
 197     const QFontMetrics& normalFontMetrics = option.fontMetrics;
 198     const int additionalRolesCount = qMax(view->visibleRoles().count() - 1, 0);
 199
 200     const QList<QByteArray>& visibleRoles = view->visibleRoles();
 201     const bool showOnlyTextRole = (visibleRoles.count() == 1) && (visibleRoles.first() == "text");
 202     const qreal maxWidth = option.maxTextWidth;
 203     const qreal paddingAndIconWidth = option.padding * 4 + option.iconSize;
 204     const qreal height = option.padding * 2 + qMax(option.iconSize, (1 + additionalRolesCount) * normalFontMetrics.lineSpacing());
 205
 206     const QFontMetrics linkFontMetrics(customizedFontForLinks(option.font));
 207
 208     for (int index = 0; index < logicalHeightHints.count(); ++index) {
 209         if (logicalHeightHints.at(index) > 0.0) {
 210             continue;
 211         }
 212
 213         // If the current item is a link, we use the customized link font metrics instead of the normal font metrics.
 214         const QFontMetrics& fontMetrics = itemIsLink(index, view) ? linkFontMetrics : normalFontMetrics;
 215
 216         // For each row exactly one role is shown. Calculate the maximum required width that is necessary
 217         // to show all roles without horizontal clipping.
 218         qreal maximumRequiredWidth = 0.0;
 219
 220         if (showOnlyTextRole) {
 221             maximumRequiredWidth = fontMetrics.width(itemText(index, view));
 222         } else {
 223             const QHash<QByteArray, QVariant>& values = view->model()->data(index);
 224             foreach (const QByteArray& role, visibleRoles) {
 225                 const QString& text = roleText(role, values);
 226                 const qreal requiredWidth = fontMetrics.width(text);
 227                 maximumRequiredWidth = qMax(maximumRequiredWidth, requiredWidth);
 228             }
 229         }
 230
 231         qreal width = paddingAndIconWidth + maximumRequiredWidth;
 232         if (maxWidth > 0 && width > maxWidth) {
 233             width = maxWidth;
 234         }
 235
 236         logicalHeightHints[index] = width;
 237     }
 238
 239     logicalWidthHint = height;
 240 }
 241
 242 void KStandardItemListWidgetInformant::calculateDetailsLayoutItemSizeHints(QVector<qreal>& logicalHeightHints, qreal& logicalWidthHint, const KItemListView* view) const
 243 {
 244     const KItemListStyleOption& option = view->styleOption();
 245     const qreal height = option.padding * 2 + qMax(option.iconSize, option.fontMetrics.height());
 246     logicalHeightHints.fill(height);
 247     logicalWidthHint = -1.0;
 248 }
 249
 250 KStandardItemListWidget::KStandardItemListWidget(KItemListWidgetInformant* informant, QGraphicsItem* parent) :
 251     KItemListWidget(informant, parent),
 252     m_isCut(false),
 253     m_isHidden(false),
 254     m_customizedFont(),
 255     m_customizedFontMetrics(m_customizedFont),
 256     m_isExpandable(false),
 257     m_supportsItemExpanding(false),
 258     m_dirtyLayout(true),
 259     m_dirtyContent(true),
 260     m_dirtyContentRoles(),
 261     m_layout(IconsLayout),
 262     m_pixmapPos(),
 263     m_pixmap(),
 264     m_scaledPixmapSize(),
 265     m_iconRect(),
 266     m_hoverPixmap(),
 267     m_textInfo(),
 268     m_textRect(),
 269     m_sortedVisibleRoles(),
 270     m_expansionArea(),
 271     m_customTextColor(),
 272     m_additionalInfoTextColor(),
 273     m_overlay(),
 274     m_rating(),
 275     m_roleEditor(0),
 276     m_oldRoleEditor(0)
 277 {
 278 }
 279
 280 KStandardItemListWidget::~KStandardItemListWidget()
 281 {
 282     qDeleteAll(m_textInfo);
 283     m_textInfo.clear();
 284
 285     if (m_roleEditor) {
 286         m_roleEditor->deleteLater();
 287     }
 288
 289     if (m_oldRoleEditor) {
 290         m_oldRoleEditor->deleteLater();
 291     }
 292 }
 293
 294 void KStandardItemListWidget::setLayout(Layout layout)
 295 {
 296     if (m_layout != layout) {
 297         m_layout = layout;
 298         m_dirtyLayout = true;
 299         updateAdditionalInfoTextColor();
 300         update();
 301     }
 302 }
 303
 304 KStandardItemListWidget::Layout KStandardItemListWidget::layout() const
 305 {
 306     return m_layout;
 307 }
 308
 309 void KStandardItemListWidget::setSupportsItemExpanding(bool supportsItemExpanding)
 310 {
 311     if (m_supportsItemExpanding != supportsItemExpanding) {
 312         m_supportsItemExpanding = supportsItemExpanding;
 313         m_dirtyLayout = true;
 314         update();
 315     }
 316 }
 317
 318 bool KStandardItemListWidget::supportsItemExpanding() const
 319 {
 320     return m_supportsItemExpanding;
 321 }
 322
 323 void KStandardItemListWidget::paint(QPainter* painter, const QStyleOptionGraphicsItem* option, QWidget* widget)
 324 {
 325     const_cast<KStandardItemListWidget*>(this)->triggerCacheRefreshing();
 326
 327     KItemListWidget::paint(painter, option, widget);
 328
 329     if (!m_expansionArea.isEmpty()) {
 330         drawSiblingsInformation(painter);
 331     }
 332
 333     const KItemListStyleOption& itemListStyleOption = styleOption();
 334     if (isHovered()) {
 335         if (hoverOpacity() < 1.0) {
 336             /*
 337              * Linear interpolation between m_pixmap and m_hoverPixmap.
 338              *
 339              * Note that this cannot be achieved by painting m_hoverPixmap over
 340              * m_pixmap, even if the opacities are adjusted. For details see
 341              * https://git.reviewboard.kde.org/r/109614/
 342              */
 343             // Paint pixmap1 so that pixmap1 = m_pixmap * (1.0 - hoverOpacity())
 344             QPixmap pixmap1(m_pixmap.size());
 345             pixmap1.fill(Qt::transparent);
 346             {
 347                 QPainter p(&pixmap1);
 348                 p.setOpacity(1.0 - hoverOpacity());
 349                 p.drawPixmap(0, 0, m_pixmap);
 350             }
 351
 352             // Paint pixmap2 so that pixmap2 = m_hoverPixmap * hoverOpacity()
 353             QPixmap pixmap2(pixmap1.size());
 354             pixmap2.fill(Qt::transparent);
 355             {
 356                 QPainter p(&pixmap2);
 357                 p.setOpacity(hoverOpacity());
 358                 p.drawPixmap(0, 0, m_hoverPixmap);
 359             }
 360
 361             // Paint pixmap2 on pixmap1 using CompositionMode_Plus
 362             // Now pixmap1 = pixmap2 + m_pixmap * (1.0 - hoverOpacity())
 363             //             = m_hoverPixmap * hoverOpacity() + m_pixmap * (1.0 - hoverOpacity())
 364             {
 365                 QPainter p(&pixmap1);
 366                 p.setCompositionMode(QPainter::CompositionMode_Plus);
 367                 p.drawPixmap(0, 0, pixmap2);
 368             }
 369
 370             // Finally paint pixmap1 on the widget
 371             drawPixmap(painter, pixmap1);
 372         } else {
 373             drawPixmap(painter, m_hoverPixmap);
 374         }
 375     } else {
 376         drawPixmap(painter, m_pixmap);
 377     }
 378
 379     painter->setFont(m_customizedFont);
 380     painter->setPen(textColor());
 381     const TextInfo* textInfo = m_textInfo.value("text");
 382
 383     if (!textInfo) {
 384         // It seems that we can end up here even if m_textInfo does not contain
 385         // the key "text", see bug 306167. According to triggerCacheRefreshing(),
 386         // this can only happen if the index is negative. This can happen when
 387         // the item is about to be removed, see KItemListView::slotItemsRemoved().
 388         // TODO: try to reproduce the crash and find a better fix.
 389         return;
 390     }
 391
 392     painter->drawStaticText(textInfo->pos, textInfo->staticText);
 393
 394     bool clipAdditionalInfoBounds = false;
 395     if (m_supportsItemExpanding) {
 396         // Prevent a possible overlapping of the additional-information texts
 397         // with the icon. This can happen if the user has minimized the width
 398         // of the name-column to a very small value.
 399         const qreal minX = m_pixmapPos.x() + m_pixmap.width() + 4 * itemListStyleOption.padding;
 400         if (textInfo->pos.x() + columnWidth("text") > minX) {
 401             clipAdditionalInfoBounds = true;
 402             painter->save();
 403             painter->setClipRect(minX, 0, size().width() - minX, size().height(), Qt::IntersectClip);
 404         }
 405     }
 406
 407     painter->setPen(m_additionalInfoTextColor);
 408     painter->setFont(m_customizedFont);
 409
 410     for (int i = 1; i < m_sortedVisibleRoles.count(); ++i) {
 411         const TextInfo* textInfo = m_textInfo.value(m_sortedVisibleRoles[i]);
 412         painter->drawStaticText(textInfo->pos, textInfo->staticText);
 413     }
 414
 415     if (!m_rating.isNull()) {
 416         const TextInfo* ratingTextInfo = m_textInfo.value("rating");
 417         QPointF pos = ratingTextInfo->pos;
 418         const Qt::Alignment align = ratingTextInfo->staticText.textOption().alignment();
 419         if (align & Qt::AlignHCenter) {
 420             pos.rx() += (size().width() - m_rating.width()) / 2 - 2;
 421         }
 422         painter->drawPixmap(pos, m_rating);
 423     }
 424
 425     if (clipAdditionalInfoBounds) {
 426         painter->restore();
 427     }
 428
 429 #ifdef KSTANDARDITEMLISTWIDGET_DEBUG
 430     painter->setBrush(Qt::NoBrush);
 431     painter->setPen(Qt::green);
 432     painter->drawRect(m_iconRect);
 433
 434     painter->setPen(Qt::blue);
 435     painter->drawRect(m_textRect);
 436
 437     painter->setPen(Qt::red);
 438     painter->drawText(QPointF(0, m_customizedFontMetrics.height()), QString::number(index()));
 439     painter->drawRect(rect());
 440 #endif
 441 }
 442
 443 QRectF KStandardItemListWidget::iconRect() const
 444 {
 445     const_cast<KStandardItemListWidget*>(this)->triggerCacheRefreshing();
 446     return m_iconRect;
 447 }
 448
 449 QRectF KStandardItemListWidget::textRect() const
 450 {
 451     const_cast<KStandardItemListWidget*>(this)->triggerCacheRefreshing();
 452     return m_textRect;
 453 }
 454
 455 QRectF KStandardItemListWidget::textFocusRect() const
 456 {
 457     // In the compact- and details-layout a larger textRect() is returned to be aligned
 458     // with the iconRect(). This is useful to have a larger selection/hover-area
 459     // when having a quite large icon size but only one line of text. Still the
 460     // focus rectangle should be shown as narrow as possible around the text.
 461
 462     const_cast<KStandardItemListWidget*>(this)->triggerCacheRefreshing();
 463
 464     switch (m_layout) {
 465     case CompactLayout: {
 466         QRectF rect = m_textRect;
 467         const TextInfo* topText    = m_textInfo.value(m_sortedVisibleRoles.first());
 468         const TextInfo* bottomText = m_textInfo.value(m_sortedVisibleRoles.last());
 469         rect.setTop(topText->pos.y());
 470         rect.setBottom(bottomText->pos.y() + bottomText->staticText.size().height());
 471         return rect;
 472     }
 473
 474     case DetailsLayout: {
 475         QRectF rect = m_textRect;
 476         const TextInfo* textInfo = m_textInfo.value(m_sortedVisibleRoles.first());
 477         rect.setTop(textInfo->pos.y());
 478         rect.setBottom(textInfo->pos.y() + textInfo->staticText.size().height());
 479
 480         const KItemListStyleOption& option = styleOption();
 481         if (option.extendedSelectionRegion) {
 482             const QString text = textInfo->staticText.text();
 483             rect.setWidth(m_customizedFontMetrics.width(text) + 2 * option.padding);
 484         }
 485
 486         return rect;
 487     }
 488
 489     default:
 490         break;
 491     }
 492
 493     return m_textRect;
 494 }
 495
 496 QRectF KStandardItemListWidget::selectionRect() const
 497 {
 498     const_cast<KStandardItemListWidget*>(this)->triggerCacheRefreshing();
 499
 500     switch (m_layout) {
 501     case IconsLayout:
 502         return m_textRect;
 503
 504     case CompactLayout:
 505     case DetailsLayout: {
 506         const int padding = styleOption().padding;
 507         QRectF adjustedIconRect = iconRect().adjusted(-padding, -padding, padding, padding);
 508         return adjustedIconRect | m_textRect;
 509     }
 510
 511     default:
 512         Q_ASSERT(false);
 513         break;
 514     }
 515
 516     return m_textRect;
 517 }
 518
 519 QRectF KStandardItemListWidget::expansionToggleRect() const
 520 {
 521     const_cast<KStandardItemListWidget*>(this)->triggerCacheRefreshing();
 522     return m_isExpandable ? m_expansionArea : QRectF();
 523 }
 524
 525 QRectF KStandardItemListWidget::selectionToggleRect() const
 526 {
 527     const_cast<KStandardItemListWidget*>(this)->triggerCacheRefreshing();
 528
 529     const int iconHeight = styleOption().iconSize;
 530
 531     int toggleSize = KIconLoader::SizeSmall;
 532     if (iconHeight >= KIconLoader::SizeEnormous) {
 533         toggleSize = KIconLoader::SizeMedium;
 534     } else if (iconHeight >= KIconLoader::SizeLarge) {
 535         toggleSize = KIconLoader::SizeSmallMedium;
 536     }
 537
 538     QPointF pos = iconRect().topLeft();
 539
 540     // If the selection toggle has a very small distance to the
 541     // widget borders, the size of the selection toggle will get
 542     // increased to prevent an accidental clicking of the item
 543     // when trying to hit the toggle.
 544     const int widgetHeight = size().height();
 545     const int widgetWidth = size().width();
 546     const int minMargin = 2;
 547
 548     if (toggleSize + minMargin * 2 >= widgetHeight) {
 549         pos.rx() -= (widgetHeight - toggleSize) / 2;
 550         toggleSize = widgetHeight;
 551         pos.setY(0);
 552     }
 553     if (toggleSize + minMargin * 2 >= widgetWidth) {
 554         pos.ry() -= (widgetWidth - toggleSize) / 2;
 555         toggleSize = widgetWidth;
 556         pos.setX(0);
 557     }
 558
 559     return QRectF(pos, QSizeF(toggleSize, toggleSize));
 560 }
 561
 562 QPixmap KStandardItemListWidget::createDragPixmap(const QStyleOptionGraphicsItem* option,
 563                                                   QWidget* widget)
 564 {
 565     QPixmap pixmap = KItemListWidget::createDragPixmap(option, widget);
 566     if (m_layout != DetailsLayout) {
 567         return pixmap;
 568     }
 569
 570     // Only return the content of the text-column as pixmap
 571     const int leftClip = m_pixmapPos.x();
 572
 573     const TextInfo* textInfo = m_textInfo.value("text");
 574     const int rightClip = textInfo->pos.x() +
 575                           textInfo->staticText.size().width() +
 576                           2 * styleOption().padding;
 577
 578     QPixmap clippedPixmap(rightClip - leftClip + 1, pixmap.height());
 579     clippedPixmap.fill(Qt::transparent);
 580
 581     QPainter painter(&clippedPixmap);
 582     painter.drawPixmap(-leftClip, 0, pixmap);
 583
 584     return clippedPixmap;
 585 }
 586
 587
 588 KItemListWidgetInformant* KStandardItemListWidget::createInformant()
 589 {
 590     return new KStandardItemListWidgetInformant();
 591 }
 592
 593 void KStandardItemListWidget::invalidateCache()
 594 {
 595     m_dirtyLayout = true;
 596     m_dirtyContent = true;
 597 }
 598
 599 void KStandardItemListWidget::refreshCache()
 600 {
 601 }
 602
 603 bool KStandardItemListWidget::isRoleRightAligned(const QByteArray& role) const
 604 {
 605     Q_UNUSED(role);
 606     return false;
 607 }
 608
 609 bool KStandardItemListWidget::isHidden() const
 610 {
 611     return false;
 612 }
 613
 614 QFont KStandardItemListWidget::customizedFont(const QFont& baseFont) const
 615 {
 616     return baseFont;
 617 }
 618
 619 QPalette::ColorRole KStandardItemListWidget::normalTextColorRole() const
 620 {
 621     return QPalette::Text;
 622 }
 623
 624 void KStandardItemListWidget::setTextColor(const QColor& color)
 625 {
 626     if (color != m_customTextColor) {
 627         m_customTextColor = color;
 628         updateAdditionalInfoTextColor();
 629         update();
 630     }
 631 }
 632
 633 QColor KStandardItemListWidget::textColor() const
 634 {
 635     if (!isSelected()) {
 636         if (m_isHidden) {
 637             return m_additionalInfoTextColor;
 638         } else if (m_customTextColor.isValid()) {
 639             return m_customTextColor;
 640         }
 641     }
 642
 643     const QPalette::ColorGroup group = isActiveWindow() ? QPalette::Active : QPalette::Inactive;
 644     const QPalette::ColorRole role = isSelected() ? QPalette::HighlightedText : normalTextColorRole();
 645     return styleOption().palette.color(group, role);
 646 }
 647
 648 void KStandardItemListWidget::setOverlay(const QPixmap& overlay)
 649 {
 650     m_overlay = overlay;
 651     m_dirtyContent = true;
 652     update();
 653 }
 654
 655 QPixmap KStandardItemListWidget::overlay() const
 656 {
 657     return m_overlay;
 658 }
 659
 660
 661 QString KStandardItemListWidget::roleText(const QByteArray& role,
 662                                           const QHash<QByteArray, QVariant>& values) const
 663 {
 664     return static_cast<const KStandardItemListWidgetInformant*>(informant())->roleText(role, values);
 665 }
 666
 667 void KStandardItemListWidget::dataChanged(const QHash<QByteArray, QVariant>& current,
 668                                           const QSet<QByteArray>& roles)
 669 {
 670     Q_UNUSED(current);
 671
 672     m_dirtyContent = true;
 673
 674     QSet<QByteArray> dirtyRoles;
 675     if (roles.isEmpty()) {
 676         dirtyRoles = visibleRoles().toSet();
 677     } else {
 678         dirtyRoles = roles;
 679     }
 680
 681     // The URL might have changed (i.e., if the sort order of the items has
 682     // been changed). Therefore, the "is cut" state must be updated.
 683     KFileItemClipboard* clipboard = KFileItemClipboard::instance();
 684     const QUrl itemUrl = data().value("url").value<QUrl>();
 685     m_isCut = clipboard->isCut(itemUrl);
 686
 687     // The icon-state might depend from other roles and hence is
 688     // marked as dirty whenever a role has been changed
 689     dirtyRoles.insert("iconPixmap");
 690     dirtyRoles.insert("iconName");
 691
 692     QSetIterator<QByteArray> it(dirtyRoles);
 693     while (it.hasNext()) {
 694         const QByteArray& role = it.next();
 695         m_dirtyContentRoles.insert(role);
 696     }
 697 }
 698
 699 void KStandardItemListWidget::visibleRolesChanged(const QList<QByteArray>& current,
 700                                               const QList<QByteArray>& previous)
 701 {
 702     Q_UNUSED(previous);
 703     m_sortedVisibleRoles = current;
 704     m_dirtyLayout = true;
 705 }
 706
 707 void KStandardItemListWidget::columnWidthChanged(const QByteArray& role,
 708                                              qreal current,
 709                                              qreal previous)
 710 {
 711     Q_UNUSED(role);
 712     Q_UNUSED(current);
 713     Q_UNUSED(previous);
 714     m_dirtyLayout = true;
 715 }
 716
 717 void KStandardItemListWidget::styleOptionChanged(const KItemListStyleOption& current,
 718                                              const KItemListStyleOption& previous)
 719 {
 720     Q_UNUSED(current);
 721     Q_UNUSED(previous);
 722     updateAdditionalInfoTextColor();
 723     m_dirtyLayout = true;
 724 }
 725
 726 void KStandardItemListWidget::hoveredChanged(bool hovered)
 727 {
 728     Q_UNUSED(hovered);
 729     m_dirtyLayout = true;
 730 }
 731
 732 void KStandardItemListWidget::selectedChanged(bool selected)
 733 {
 734     Q_UNUSED(selected);
 735     updateAdditionalInfoTextColor();
 736     m_dirtyContent = true;
 737 }
 738
 739 void KStandardItemListWidget::siblingsInformationChanged(const QBitArray& current, const QBitArray& previous)
 740 {
 741     Q_UNUSED(current);
 742     Q_UNUSED(previous);
 743     m_dirtyLayout = true;
 744 }
 745
 746 int KStandardItemListWidget::selectionLength(const QString& text) const
 747 {
 748     return text.length();
 749 }
 750
 751 void KStandardItemListWidget::editedRoleChanged(const QByteArray& current, const QByteArray& previous)
 752 {
 753     Q_UNUSED(previous);
 754
 755     QGraphicsView* parent = scene()->views()[0];
 756     if (current.isEmpty() || !parent || current != "text") {
 757         if (m_roleEditor) {
 758             emit roleEditingCanceled(index(), current, data().value(current));
 759
 760             disconnect(m_roleEditor, &KItemListRoleEditor::roleEditingCanceled,
 761                        this, &KStandardItemListWidget::slotRoleEditingCanceled);
 762             disconnect(m_roleEditor, &KItemListRoleEditor::roleEditingFinished,
 763                        this, &KStandardItemListWidget::slotRoleEditingFinished);
 764
 765             if (m_oldRoleEditor) {
 766                 m_oldRoleEditor->deleteLater();
 767             }
 768             m_oldRoleEditor = m_roleEditor;
 769             m_roleEditor->hide();
 770             m_roleEditor = 0;
 771         }
 772         return;
 773     }
 774
 775     Q_ASSERT(!m_roleEditor);
 776
 777     const TextInfo* textInfo = m_textInfo.value("text");
 778
 779     m_roleEditor = new KItemListRoleEditor(parent);
 780     m_roleEditor->setRole(current);
 781     m_roleEditor->setFont(styleOption().font);
 782
 783     const QString text = data().value(current).toString();
 784     m_roleEditor->setPlainText(text);
 785
 786     QTextOption textOption = textInfo->staticText.textOption();
 787     m_roleEditor->document()->setDefaultTextOption(textOption);
 788
 789     const int textSelectionLength = selectionLength(text);
 790
 791     if (textSelectionLength > 0) {
 792         QTextCursor cursor = m_roleEditor->textCursor();
 793         cursor.movePosition(QTextCursor::StartOfBlock);
 794         cursor.movePosition(QTextCursor::NextCharacter, QTextCursor::KeepAnchor, textSelectionLength);
 795         m_roleEditor->setTextCursor(cursor);
 796     }
 797
 798     connect(m_roleEditor, &KItemListRoleEditor::roleEditingCanceled,
 799             this, &KStandardItemListWidget::slotRoleEditingCanceled);
 800     connect(m_roleEditor, &KItemListRoleEditor::roleEditingFinished,
 801             this, &KStandardItemListWidget::slotRoleEditingFinished);
 802
 803     // Adjust the geometry of the editor
 804     QRectF rect = roleEditingRect(current);
 805     const int frameWidth = m_roleEditor->frameWidth();
 806     rect.adjust(-frameWidth, -frameWidth, frameWidth, frameWidth);
 807     rect.translate(pos());
 808     if (rect.right() > parent->width()) {
 809         rect.setWidth(parent->width() - rect.left());
 810     }
 811     m_roleEditor->setGeometry(rect.toRect());
 812     m_roleEditor->show();
 813     m_roleEditor->setFocus();
 814 }
 815
 816 void KStandardItemListWidget::resizeEvent(QGraphicsSceneResizeEvent* event)
 817 {
 818     if (m_roleEditor) {
 819         setEditedRole(QByteArray());
 820         Q_ASSERT(!m_roleEditor);
 821     }
 822
 823     KItemListWidget::resizeEvent(event);
 824
 825     m_dirtyLayout = true;
 826 }
 827
 828 void KStandardItemListWidget::showEvent(QShowEvent* event)
 829 {
 830     KItemListWidget::showEvent(event);
 831
 832     // Listen to changes of the clipboard to mark the item as cut/uncut
 833     KFileItemClipboard* clipboard = KFileItemClipboard::instance();
 834
 835     const QUrl itemUrl = data().value("url").value<QUrl>();
 836     m_isCut = clipboard->isCut(itemUrl);
 837
 838     connect(clipboard, &KFileItemClipboard::cutItemsChanged,
 839             this, &KStandardItemListWidget::slotCutItemsChanged);
 840 }
 841
 842 void KStandardItemListWidget::hideEvent(QHideEvent* event)
 843 {
 844     disconnect(KFileItemClipboard::instance(), &KFileItemClipboard::cutItemsChanged,
 845                this, &KStandardItemListWidget::slotCutItemsChanged);
 846
 847     KItemListWidget::hideEvent(event);
 848 }
 849
 850 void KStandardItemListWidget::slotCutItemsChanged()
 851 {
 852     const QUrl itemUrl = data().value("url").value<QUrl>();
 853     const bool isCut = KFileItemClipboard::instance()->isCut(itemUrl);
 854     if (m_isCut != isCut) {
 855         m_isCut = isCut;
 856         m_pixmap = QPixmap();
 857         m_dirtyContent = true;
 858         update();
 859     }
 860 }
 861
 862 void KStandardItemListWidget::slotRoleEditingCanceled(const QByteArray& role,
 863                                                       const QVariant& value)
 864 {
 865     closeRoleEditor();
 866     emit roleEditingCanceled(index(), role, value);
 867     setEditedRole(QByteArray());
 868 }
 869
 870 void KStandardItemListWidget::slotRoleEditingFinished(const QByteArray& role,
 871                                                       const QVariant& value)
 872 {
 873     closeRoleEditor();
 874     emit roleEditingFinished(index(), role, value);
 875     setEditedRole(QByteArray());
 876 }
 877
 878 void KStandardItemListWidget::triggerCacheRefreshing()
 879 {
 880     if ((!m_dirtyContent && !m_dirtyLayout) || index() < 0) {
 881         return;
 882     }
 883
 884     refreshCache();
 885
 886     const QHash<QByteArray, QVariant> values = data();
 887     m_isExpandable = m_supportsItemExpanding && values["isExpandable"].toBool();
 888     m_isHidden = isHidden();
 889     m_customizedFont = customizedFont(styleOption().font);
 890     m_customizedFontMetrics = QFontMetrics(m_customizedFont);
 891
 892     updateExpansionArea();
 893     updateTextsCache();
 894     updatePixmapCache();
 895
 896     m_dirtyLayout = false;
 897     m_dirtyContent = false;
 898     m_dirtyContentRoles.clear();
 899 }
 900
 901 void KStandardItemListWidget::updateExpansionArea()
 902 {
 903     if (m_supportsItemExpanding) {
 904         const QHash<QByteArray, QVariant> values = data();
 905         const int expandedParentsCount = values.value("expandedParentsCount", 0).toInt();
 906         if (expandedParentsCount >= 0) {
 907             const KItemListStyleOption& option = styleOption();
 908             const qreal widgetHeight = size().height();
 909             const qreal inc = (widgetHeight - option.iconSize) / 2;
 910             const qreal x = expandedParentsCount * widgetHeight + inc;
 911             const qreal y = inc;
 912             m_expansionArea = QRectF(x, y, option.iconSize, option.iconSize);
 913             return;
 914         }
 915     }
 916
 917     m_expansionArea = QRectF();
 918 }
 919
 920 void KStandardItemListWidget::updatePixmapCache()
 921 {
 922     // Precondition: Requires already updated m_textPos values to calculate
 923     // the remaining height when the alignment is vertical.
 924
 925     const QSizeF widgetSize = size();
 926     const bool iconOnTop = (m_layout == IconsLayout);
 927     const KItemListStyleOption& option = styleOption();
 928     const qreal padding = option.padding;
 929
 930     const int maxIconWidth = iconOnTop ? widgetSize.width() - 2 * padding : option.iconSize;
 931     const int maxIconHeight = option.iconSize;
 932
 933     const QHash<QByteArray, QVariant> values = data();
 934
 935     bool updatePixmap = (m_pixmap.width() != maxIconWidth || m_pixmap.height() != maxIconHeight);
 936     if (!updatePixmap && m_dirtyContent) {
 937         updatePixmap = m_dirtyContentRoles.isEmpty()
 938                        || m_dirtyContentRoles.contains("iconPixmap")
 939                        || m_dirtyContentRoles.contains("iconName")
 940                        || m_dirtyContentRoles.contains("iconOverlays");
 941     }
 942
 943     if (updatePixmap) {
 944         m_pixmap = values["iconPixmap"].value<QPixmap>();
 945         if (m_pixmap.isNull()) {
 946             // Use the icon that fits to the MIME-type
 947             QString iconName = values["iconName"].toString();
 948             if (iconName.isEmpty()) {
 949                 // The icon-name has not been not resolved by KFileItemModelRolesUpdater,
 950                 // use a generic icon as fallback
 951                 iconName = QLatin1String("unknown");
 952             }
 953             const QStringList overlays = values["iconOverlays"].toStringList();
 954             m_pixmap = pixmapForIcon(iconName, overlays, maxIconHeight);
 955         } else if (m_pixmap.width() != maxIconWidth || m_pixmap.height() != maxIconHeight) {
 956             // A custom pixmap has been applied. Assure that the pixmap
 957             // is scaled to the maximum available size.
 958             KPixmapModifier::scale(m_pixmap, QSize(maxIconWidth, maxIconHeight));
 959         }
 960
 961         if (m_isCut) {
 962             KIconEffect* effect = KIconLoader::global()->iconEffect();
 963             m_pixmap = effect->apply(m_pixmap, KIconLoader::Desktop, KIconLoader::DisabledState);
 964         }
 965
 966         if (m_isHidden) {
 967             KIconEffect::semiTransparent(m_pixmap);
 968         }
 969
 970         if (m_layout == IconsLayout && isSelected()) {
 971             const QColor color = palette().brush(QPalette::Normal, QPalette::Highlight).color();
 972             QImage image = m_pixmap.toImage();
 973             KIconEffect::colorize(image, color, 0.8f);
 974             m_pixmap = QPixmap::fromImage(image);
 975         }
 976     }
 977
 978     if (!m_overlay.isNull()) {
 979         QPainter painter(&m_pixmap);
 980         painter.drawPixmap(0, m_pixmap.height() - m_overlay.height(), m_overlay);
 981     }
 982
 983     int scaledIconSize = 0;
 984     if (iconOnTop) {
 985         const TextInfo* textInfo = m_textInfo.value("text");
 986         scaledIconSize = static_cast<int>(textInfo->pos.y() - 2 * padding);
 987     } else {
 988         const int textRowsCount = (m_layout == CompactLayout) ? visibleRoles().count() : 1;
 989         const qreal requiredTextHeight = textRowsCount * m_customizedFontMetrics.height();
 990         scaledIconSize = (requiredTextHeight < maxIconHeight) ?
 991                            widgetSize.height() - 2 * padding : maxIconHeight;
 992     }
 993
 994     const int maxScaledIconWidth = iconOnTop ? widgetSize.width() - 2 * padding : scaledIconSize;
 995     const int maxScaledIconHeight = scaledIconSize;
 996
 997     m_scaledPixmapSize = m_pixmap.size();
 998     m_scaledPixmapSize.scale(maxScaledIconWidth, maxScaledIconHeight, Qt::KeepAspectRatio);
 999
1000     if (iconOnTop) {
1001         // Center horizontally and align on bottom within the icon-area
1002         m_pixmapPos.setX((widgetSize.width() - m_scaledPixmapSize.width()) / 2);
1003         m_pixmapPos.setY(padding + scaledIconSize - m_scaledPixmapSize.height());
1004     } else {
1005         // Center horizontally and vertically within the icon-area
1006         const TextInfo* textInfo = m_textInfo.value("text");
1007         m_pixmapPos.setX(textInfo->pos.x() - 2 * padding
1008                          - (scaledIconSize + m_scaledPixmapSize.width()) / 2);
1009         m_pixmapPos.setY(padding
1010                          + (scaledIconSize - m_scaledPixmapSize.height()) / 2);
1011     }
1012
1013     m_iconRect = QRectF(m_pixmapPos, QSizeF(m_scaledPixmapSize));
1014
1015     // Prepare the pixmap that is used when the item gets hovered
1016     if (isHovered()) {
1017         m_hoverPixmap = m_pixmap;
1018         KIconEffect* effect = KIconLoader::global()->iconEffect();
1019         // In the KIconLoader terminology, active = hover.
1020         if (effect->hasEffect(KIconLoader::Desktop, KIconLoader::ActiveState)) {
1021             m_hoverPixmap = effect->apply(m_pixmap, KIconLoader::Desktop, KIconLoader::ActiveState);
1022         } else {
1023             m_hoverPixmap = m_pixmap;
1024         }
1025     } else if (hoverOpacity() <= 0.0) {
1026         // No hover animation is ongoing. Clear m_hoverPixmap to save memory.
1027         m_hoverPixmap = QPixmap();
1028     }
1029 }
1030
1031 void KStandardItemListWidget::updateTextsCache()
1032 {
1033     QTextOption textOption;
1034     switch (m_layout) {
1035     case IconsLayout:
1036         textOption.setWrapMode(QTextOption::WrapAtWordBoundaryOrAnywhere);
1037         textOption.setAlignment(Qt::AlignHCenter);
1038         break;
1039     case CompactLayout:
1040     case DetailsLayout:
1041         textOption.setAlignment(Qt::AlignLeft);
1042         textOption.setWrapMode(QTextOption::NoWrap);
1043         break;
1044     default:
1045         Q_ASSERT(false);
1046         break;
1047     }
1048
1049     qDeleteAll(m_textInfo);
1050     m_textInfo.clear();
1051     for (int i = 0; i < m_sortedVisibleRoles.count(); ++i) {
1052         TextInfo* textInfo = new TextInfo();
1053         textInfo->staticText.setTextFormat(Qt::PlainText);
1054         textInfo->staticText.setPerformanceHint(QStaticText::AggressiveCaching);
1055         textInfo->staticText.setTextOption(textOption);
1056         m_textInfo.insert(m_sortedVisibleRoles[i], textInfo);
1057     }
1058
1059     switch (m_layout) {
1060     case IconsLayout:   updateIconsLayoutTextCache(); break;
1061     case CompactLayout: updateCompactLayoutTextCache(); break;
1062     case DetailsLayout: updateDetailsLayoutTextCache(); break;
1063     default: Q_ASSERT(false); break;
1064     }
1065
1066     const TextInfo* ratingTextInfo = m_textInfo.value("rating");
1067     if (ratingTextInfo) {
1068         // The text of the rating-role has been set to empty to get
1069         // replaced by a rating-image showing the rating as stars.
1070         const KItemListStyleOption& option = styleOption();
1071         QSizeF ratingSize = preferredRatingSize(option);
1072
1073         const qreal availableWidth = (m_layout == DetailsLayout)
1074                                      ? columnWidth("rating") - columnPadding(option)
1075                                      : size().width();
1076         if (ratingSize.width() > availableWidth) {
1077             ratingSize.rwidth() = availableWidth;
1078         }
1079         m_rating = QPixmap(ratingSize.toSize());
1080         m_rating.fill(Qt::transparent);
1081
1082         QPainter painter(&m_rating);
1083         const QRect rect(0, 0, m_rating.width(), m_rating.height());
1084         const int rating = data().value("rating").toInt();
1085         KRatingPainter::paintRating(&painter, rect, Qt::AlignJustify | Qt::AlignVCenter, rating);
1086     } else if (!m_rating.isNull()) {
1087         m_rating = QPixmap();
1088     }
1089 }
1090
1091 void KStandardItemListWidget::updateIconsLayoutTextCache()
1092 {
1093     //      +------+
1094     //      | Icon |
1095     //      +------+
1096     //
1097     //    Name role that
1098     // might get wrapped above
1099     //    several lines.
1100     //  Additional role 1
1101     //  Additional role 2
1102
1103     const QHash<QByteArray, QVariant> values = data();
1104
1105     const KItemListStyleOption& option = styleOption();
1106     const qreal padding = option.padding;
1107     const qreal maxWidth = size().width() - 2 * padding;
1108     const qreal widgetHeight = size().height();
1109     const qreal lineSpacing = m_customizedFontMetrics.lineSpacing();
1110
1111     // Initialize properties for the "text" role. It will be used as anchor
1112     // for initializing the position of the other roles.
1113     TextInfo* nameTextInfo = m_textInfo.value("text");
1114     const QString nameText = KStringHandler::preProcessWrap(values["text"].toString());
1115     nameTextInfo->staticText.setText(nameText);
1116
1117     // Calculate the number of lines required for the name and the required width
1118     qreal nameWidth = 0;
1119     qreal nameHeight = 0;
1120     QTextLine line;
1121
1122     QTextLayout layout(nameTextInfo->staticText.text(), m_customizedFont);
1123     layout.setTextOption(nameTextInfo->staticText.textOption());
1124     layout.beginLayout();
1125     int nameLineIndex = 0;
1126     while ((line = layout.createLine()).isValid()) {
1127         line.setLineWidth(maxWidth);
1128         nameWidth = qMax(nameWidth, line.naturalTextWidth());
1129         nameHeight += line.height();
1130
1131         ++nameLineIndex;
1132         if (nameLineIndex == option.maxTextLines) {
1133             // The maximum number of textlines has been reached. If this is
1134             // the case provide an elided text if necessary.
1135             const int textLength = line.textStart() + line.textLength();
1136             if (textLength < nameText.length()) {
1137                 // Elide the last line of the text
1138                 qreal elidingWidth = maxWidth;
1139                 qreal lastLineWidth;
1140                 do {
1141                     QString lastTextLine = nameText.mid(line.textStart());
1142                     lastTextLine = m_customizedFontMetrics.elidedText(lastTextLine,
1143                                                                       Qt::ElideRight,
1144                                                                       elidingWidth);
1145                     const QString elidedText = nameText.left(line.textStart()) + lastTextLine;
1146                     nameTextInfo->staticText.setText(elidedText);
1147
1148                     lastLineWidth = m_customizedFontMetrics.boundingRect(lastTextLine).width();
1149
1150                     // We do the text eliding in a loop with decreasing width (1 px / iteration)
1151                     // to avoid problems related to different width calculation code paths
1152                     // within Qt. (see bug 337104)
1153                     elidingWidth -= 1.0;
1154                 } while (lastLineWidth > maxWidth);
1155
1156                 nameWidth = qMax(nameWidth, lastLineWidth);
1157             }
1158             break;
1159         }
1160     }
1161     layout.endLayout();
1162
1163     // Use one line for each additional information
1164     const int additionalRolesCount = qMax(visibleRoles().count() - 1, 0);
1165     nameTextInfo->staticText.setTextWidth(maxWidth);
1166     nameTextInfo->pos = QPointF(padding, widgetHeight -
1167                                          nameHeight -
1168                                          additionalRolesCount * lineSpacing -
1169                                          padding);
1170     m_textRect = QRectF(padding + (maxWidth - nameWidth) / 2,
1171                         nameTextInfo->pos.y(),
1172                         nameWidth,
1173                         nameHeight);
1174
1175     // Calculate the position for each additional information
1176     qreal y = nameTextInfo->pos.y() + nameHeight;
1177     foreach (const QByteArray& role, m_sortedVisibleRoles) {
1178         if (role == "text") {
1179             continue;
1180         }
1181
1182         const QString text = roleText(role, values);
1183         TextInfo* textInfo = m_textInfo.value(role);
1184         textInfo->staticText.setText(text);
1185
1186         qreal requiredWidth = 0;
1187
1188         QTextLayout layout(text, m_customizedFont);
1189         QTextOption textOption;
1190         textOption.setWrapMode(QTextOption::NoWrap);
1191         layout.setTextOption(textOption);
1192
1193         layout.beginLayout();
1194         QTextLine textLine = layout.createLine();
1195         if (textLine.isValid()) {
1196             textLine.setLineWidth(maxWidth);
1197             requiredWidth = textLine.naturalTextWidth();
1198             if (requiredWidth > maxWidth) {
1199                 const QString elidedText = m_customizedFontMetrics.elidedText(text, Qt::ElideRight, maxWidth);
1200                 textInfo->staticText.setText(elidedText);
1201                 requiredWidth = m_customizedFontMetrics.width(elidedText);
1202             } else if (role == "rating") {
1203                 // Use the width of the rating pixmap, because the rating text is empty.
1204                 requiredWidth = m_rating.width();
1205             }
1206         }
1207         layout.endLayout();
1208
1209         textInfo->pos = QPointF(padding, y);
1210         textInfo->staticText.setTextWidth(maxWidth);
1211
1212         const QRectF textRect(padding + (maxWidth - requiredWidth) / 2, y, requiredWidth, lineSpacing);
1213         m_textRect |= textRect;
1214
1215         y += lineSpacing;
1216     }
1217
1218     // Add a padding to the text rectangle
1219     m_textRect.adjust(-padding, -padding, padding, padding);
1220 }
1221
1222 void KStandardItemListWidget::updateCompactLayoutTextCache()
1223 {
1224     // +------+  Name role
1225     // | Icon |  Additional role 1
1226     // +------+  Additional role 2
1227
1228     const QHash<QByteArray, QVariant> values = data();
1229
1230     const KItemListStyleOption& option = styleOption();
1231     const qreal widgetHeight = size().height();
1232     const qreal lineSpacing = m_customizedFontMetrics.lineSpacing();
1233     const qreal textLinesHeight = qMax(visibleRoles().count(), 1) * lineSpacing;
1234     const int scaledIconSize = (textLinesHeight < option.iconSize) ? widgetHeight - 2 * option.padding : option.iconSize;
1235
1236     qreal maximumRequiredTextWidth = 0;
1237     const qreal x = option.padding * 3 + scaledIconSize;
1238     qreal y = qRound((widgetHeight - textLinesHeight) / 2);
1239     const qreal maxWidth = size().width() - x - option.padding;
1240     foreach (const QByteArray& role, m_sortedVisibleRoles) {
1241         const QString text = roleText(role, values);
1242         TextInfo* textInfo = m_textInfo.value(role);
1243         textInfo->staticText.setText(text);
1244
1245         qreal requiredWidth = m_customizedFontMetrics.width(text);
1246         if (requiredWidth > maxWidth) {
1247             requiredWidth = maxWidth;
1248             const QString elidedText = m_customizedFontMetrics.elidedText(text, Qt::ElideRight, maxWidth);
1249             textInfo->staticText.setText(elidedText);
1250         }
1251
1252         textInfo->pos = QPointF(x, y);
1253         textInfo->staticText.setTextWidth(maxWidth);
1254
1255         maximumRequiredTextWidth = qMax(maximumRequiredTextWidth, requiredWidth);
1256
1257         y += lineSpacing;
1258     }
1259
1260     m_textRect = QRectF(x - 2 * option.padding, 0, maximumRequiredTextWidth + 3 * option.padding, widgetHeight);
1261 }
1262
1263 void KStandardItemListWidget::updateDetailsLayoutTextCache()
1264 {
1265     // Precondition: Requires already updated m_expansionArea
1266     // to determine the left position.
1267
1268     // +------+
1269     // | Icon |  Name role   Additional role 1   Additional role 2
1270     // +------+
1271     m_textRect = QRectF();
1272
1273     const KItemListStyleOption& option = styleOption();
1274     const QHash<QByteArray, QVariant> values = data();
1275
1276     const qreal widgetHeight = size().height();
1277     const int scaledIconSize = widgetHeight - 2 * option.padding;
1278     const int fontHeight = m_customizedFontMetrics.height();
1279
1280     const qreal columnWidthInc = columnPadding(option);
1281     qreal firstColumnInc = scaledIconSize;
1282     if (m_supportsItemExpanding) {
1283         firstColumnInc += (m_expansionArea.left() + m_expansionArea.right() + widgetHeight) / 2;
1284     } else {
1285         firstColumnInc += option.padding;
1286     }
1287
1288     qreal x = firstColumnInc;
1289     const qreal y = qMax(qreal(option.padding), (widgetHeight - fontHeight) / 2);
1290
1291     foreach (const QByteArray& role, m_sortedVisibleRoles) {
1292         QString text = roleText(role, values);
1293
1294         // Elide the text in case it does not fit into the available column-width
1295         qreal requiredWidth = m_customizedFontMetrics.width(text);
1296         const qreal roleWidth = columnWidth(role);
1297         qreal availableTextWidth = roleWidth - columnWidthInc;
1298
1299         const bool isTextRole = (role == "text");
1300         if (isTextRole) {
1301             availableTextWidth -= firstColumnInc;
1302         }
1303
1304         if (requiredWidth > availableTextWidth) {
1305             text = m_customizedFontMetrics.elidedText(text, Qt::ElideRight, availableTextWidth);
1306             requiredWidth = m_customizedFontMetrics.width(text);
1307         }
1308
1309         TextInfo* textInfo = m_textInfo.value(role);
1310         textInfo->staticText.setText(text);
1311         textInfo->pos = QPointF(x + columnWidthInc / 2, y);
1312         x += roleWidth;
1313
1314         if (isTextRole) {
1315             const qreal textWidth = option.extendedSelectionRegion
1316                                     ? size().width() - textInfo->pos.x()
1317                                     : requiredWidth + 2 * option.padding;
1318             m_textRect = QRectF(textInfo->pos.x() - 2 * option.padding, 0,
1319                                 textWidth + option.padding, size().height());
1320
1321             // The column after the name should always be aligned on the same x-position independent
1322             // from the expansion-level shown in the name column
1323             x -= firstColumnInc;
1324         } else if (isRoleRightAligned(role)) {
1325             textInfo->pos.rx() += roleWidth - requiredWidth - columnWidthInc;
1326         }
1327     }
1328 }
1329
1330 void KStandardItemListWidget::updateAdditionalInfoTextColor()
1331 {
1332     QColor c1;
1333     if (m_customTextColor.isValid()) {
1334         c1 = m_customTextColor;
1335     } else if (isSelected() && m_layout != DetailsLayout) {
1336         c1 = styleOption().palette.highlightedText().color();
1337     } else {
1338         c1 = styleOption().palette.text().color();
1339     }
1340
1341     // For the color of the additional info the inactive text color
1342     // is not used as this might lead to unreadable text for some color schemes. Instead
1343     // the text color c1 is slightly mixed with the background color.
1344     const QColor c2 = styleOption().palette.base().color();
1345     const int p1 = 70;
1346     const int p2 = 100 - p1;
1347     m_additionalInfoTextColor = QColor((c1.red()   * p1 + c2.red()   * p2) / 100,
1348                                        (c1.green() * p1 + c2.green() * p2) / 100,
1349                                        (c1.blue()  * p1 + c2.blue()  * p2) / 100);
1350 }
1351
1352 void KStandardItemListWidget::drawPixmap(QPainter* painter, const QPixmap& pixmap)
1353 {
1354     if (m_scaledPixmapSize != pixmap.size()) {
1355         QPixmap scaledPixmap = pixmap;
1356         KPixmapModifier::scale(scaledPixmap, m_scaledPixmapSize);
1357         painter->drawPixmap(m_pixmapPos, scaledPixmap);
1358
1359 #ifdef KSTANDARDITEMLISTWIDGET_DEBUG
1360         painter->setPen(Qt::blue);
1361         painter->drawRect(QRectF(m_pixmapPos, QSizeF(m_scaledPixmapSize)));
1362 #endif
1363     } else {
1364         painter->drawPixmap(m_pixmapPos, pixmap);
1365     }
1366 }
1367
1368 void KStandardItemListWidget::drawSiblingsInformation(QPainter* painter)
1369 {
1370     const int siblingSize = size().height();
1371     const int x = (m_expansionArea.left() + m_expansionArea.right() - siblingSize) / 2;
1372     QRect siblingRect(x, 0, siblingSize, siblingSize);
1373
1374     QStyleOption option;
1375     option.palette.setColor(QPalette::Text, option.palette.color(normalTextColorRole()));
1376     bool isItemSibling = true;
1377
1378     const QBitArray siblings = siblingsInformation();
1379     for (int i = siblings.count() - 1; i >= 0; --i) {
1380         option.rect = siblingRect;
1381         option.state = siblings.at(i) ? QStyle::State_Sibling : QStyle::State_None;
1382
1383         if (isItemSibling) {
1384             option.state |= QStyle::State_Item;
1385             if (m_isExpandable) {
1386                 option.state |= QStyle::State_Children;
1387             }
1388             if (data()["isExpanded"].toBool()) {
1389                 option.state |= QStyle::State_Open;
1390             }
1391             isItemSibling = false;
1392         }
1393
1394         style()->drawPrimitive(QStyle::PE_IndicatorBranch, &option, painter);
1395
1396         siblingRect.translate(-siblingRect.width(), 0);
1397     }
1398 }
1399
1400 QRectF KStandardItemListWidget::roleEditingRect(const QByteArray& role) const
1401 {
1402     const TextInfo* textInfo = m_textInfo.value(role);
1403     if (!textInfo) {
1404         return QRectF();
1405     }
1406
1407     QRectF rect(textInfo->pos, textInfo->staticText.size());
1408     if (m_layout == DetailsLayout) {
1409         rect.setWidth(columnWidth(role) - rect.x());
1410     }
1411
1412     return rect;
1413 }
1414
1415 void KStandardItemListWidget::closeRoleEditor()
1416 {
1417     disconnect(m_roleEditor, &KItemListRoleEditor::roleEditingCanceled,
1418                this, &KStandardItemListWidget::slotRoleEditingCanceled);
1419     disconnect(m_roleEditor, &KItemListRoleEditor::roleEditingFinished,
1420                this, &KStandardItemListWidget::slotRoleEditingFinished);
1421
1422     if (m_roleEditor->hasFocus()) {
1423         // If the editing was not ended by a FocusOut event, we have
1424         // to transfer the keyboard focus back to the KItemListContainer.
1425         scene()->views()[0]->parentWidget()->setFocus();
1426     }
1427
1428     if (m_oldRoleEditor) {
1429         m_oldRoleEditor->deleteLater();
1430     }
1431     m_oldRoleEditor = m_roleEditor;
1432     m_roleEditor->hide();
1433     m_roleEditor = 0;
1434 }
1435
1436 QPixmap KStandardItemListWidget::pixmapForIcon(const QString& name, const QStringList& overlays, int size)
1437 {
1438     const QString key = "KStandardItemListWidget:" % name % ":" % overlays.join(":") % ":" % QString::number(size);
1439     QPixmap pixmap;
1440
1441     if (!QPixmapCache::find(key, pixmap)) {
1442         const QIcon icon = QIcon::fromTheme(name);
1443
1444         int requestedSize;
1445         if (size <= KIconLoader::SizeSmall) {
1446             requestedSize = KIconLoader::SizeSmall;
1447         } else if (size <= KIconLoader::SizeSmallMedium) {
1448             requestedSize = KIconLoader::SizeSmallMedium;
1449         } else if (size <= KIconLoader::SizeMedium) {
1450             requestedSize = KIconLoader::SizeMedium;
1451         } else if (size <= KIconLoader::SizeLarge) {
1452             requestedSize = KIconLoader::SizeLarge;
1453         } else if (size <= KIconLoader::SizeHuge) {
1454             requestedSize = KIconLoader::SizeHuge;
1455         } else if (size <= KIconLoader::SizeEnormous) {
1456             requestedSize = KIconLoader::SizeEnormous;
1457         } else if (size <= KIconLoader::SizeEnormous * 2) {
1458             requestedSize = KIconLoader::SizeEnormous * 2;
1459         } else {
1460             requestedSize = size;
1461         }
1462
1463         pixmap = icon.pixmap(requestedSize, requestedSize);
1464         if (requestedSize != size) {
1465             KPixmapModifier::scale(pixmap, QSize(size, size));
1466         }
1467
1468         // Strangely KFileItem::overlays() returns empty string-values, so
1469         // we need to check first whether an overlay must be drawn at all.
1470         // It is more efficient to do it here, as KIconLoader::drawOverlays()
1471         // assumes that an overlay will be drawn and has some additional
1472         // setup time.
1473         foreach (const QString& overlay, overlays) {
1474             if (!overlay.isEmpty()) {
1475                 // There is at least one overlay, draw all overlays above m_pixmap
1476                 // and cancel the check
1477                 KIconLoader::global()->drawOverlays(overlays, pixmap, KIconLoader::Desktop);
1478                 break;
1479             }
1480         }
1481
1482         QPixmapCache::insert(key, pixmap);
1483     }
1484
1485     return pixmap;
1486 }
1487
1488 QSizeF KStandardItemListWidget::preferredRatingSize(const KItemListStyleOption& option)
1489 {
1490     const qreal height = option.fontMetrics.ascent();
1491     return QSizeF(height * 5, height);
1492 }
1493
1494 qreal KStandardItemListWidget::columnPadding(const KItemListStyleOption& option)
1495 {
1496     return option.padding * 6;
1497 }
1498