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.h>
  29 #include <KStringHandler>
  30 #include <QDebug>
  31
  32 #include "private/kfileitemclipboard.h"
  33 #include "private/kitemlistroleeditor.h"
  34 #include "private/kpixmapmodifier.h"
  35
  36 #include <QGraphicsScene>
  37 #include <QGraphicsSceneResizeEvent>
  38 #include <QGraphicsView>
  39 #include <QPainter>
  40 #include <QStyleOption>
  41 #include <QTextLayout>
  42 #include <QTextLine>
  43 #include <QPixmapCache>
  44
  45 // #define KSTANDARDITEMLISTWIDGET_DEBUG
  46
  47 KStandardItemListWidgetInformant::KStandardItemListWidgetInformant() :
  48     KItemListWidgetInformant()
  49 {
  50 }
  51
  52 KStandardItemListWidgetInformant::~KStandardItemListWidgetInformant()
  53 {
  54 }
  55
  56 void KStandardItemListWidgetInformant::calculateItemSizeHints(QVector<qreal>& logicalHeightHints, qreal& logicalWidthHint, const KItemListView* view) const
  57 {
  58     switch (static_cast<const KStandardItemListView*>(view)->itemLayout()) {
  59     case KStandardItemListWidget::IconsLayout:
  60         calculateIconsLayoutItemSizeHints(logicalHeightHints, logicalWidthHint, view);
  61         break;
  62
  63     case KStandardItemListWidget::CompactLayout:
  64         calculateCompactLayoutItemSizeHints(logicalHeightHints, logicalWidthHint, view);
  65         break;
  66
  67     case KStandardItemListWidget::DetailsLayout:
  68         calculateDetailsLayoutItemSizeHints(logicalHeightHints, logicalWidthHint, view);
  69         break;
  70
  71     default:
  72         Q_ASSERT(false);
  73         break;
  74     }
  75 }
  76
  77 qreal KStandardItemListWidgetInformant::preferredRoleColumnWidth(const QByteArray& role,
  78                                                                  int index,
  79                                                                  const KItemListView* view) const
  80 {
  81     const QHash<QByteArray, QVariant> values = view->model()->data(index);
  82     const KItemListStyleOption& option = view->styleOption();
  83
  84     const QString text = roleText(role, values);
  85     qreal width = KStandardItemListWidget::columnPadding(option);
  86
  87     const QFontMetrics& normalFontMetrics = option.fontMetrics;
  88     const QFontMetrics linkFontMetrics(customizedFontForLinks(option.font));
  89
  90     if (role == "rating") {
  91         width += KStandardItemListWidget::preferredRatingSize(option).width();
  92     } else {
  93         // If current item is a link, we use the customized link font metrics instead of the normal font metrics.
  94         const QFontMetrics& fontMetrics = itemIsLink(index, view) ? linkFontMetrics : normalFontMetrics;
  95
  96         width += fontMetrics.width(text);
  97
  98         if (role == "text") {
  99             if (view->supportsItemExpanding()) {
 100                 // Increase the width by the expansion-toggle and the current expansion level
 101                 const int expandedParentsCount = values.value("expandedParentsCount", 0).toInt();
 102                 const qreal height = option.padding * 2 + qMax(option.iconSize, fontMetrics.height());
 103                 width += (expandedParentsCount + 1) * height;
 104             }
 105
 106             // Increase the width by the required space for the icon
 107             width += option.padding * 2 + option.iconSize;
 108         }
 109     }
 110
 111     return width;
 112 }
 113
 114 QString KStandardItemListWidgetInformant::itemText(int index, const KItemListView* view) const
 115 {
 116     return view->model()->data(index).value("text").toString();
 117 }
 118
 119 bool KStandardItemListWidgetInformant::itemIsLink(int index, const KItemListView* view) const
 120 {
 121     Q_UNUSED(index);
 122     Q_UNUSED(view);
 123     return false;
 124 }
 125
 126 QString KStandardItemListWidgetInformant::roleText(const QByteArray& role,
 127                                                    const QHash<QByteArray, QVariant>& values) const
 128 {
 129     if (role == "rating") {
 130         // Always use an empty text, as the rating is shown by the image m_rating.
 131         return QString();
 132     }
 133     return values.value(role).toString();
 134 }
 135
 136 QFont KStandardItemListWidgetInformant::customizedFontForLinks(const QFont& baseFont) const
 137 {
 138     return baseFont;
 139 }
 140
 141 void KStandardItemListWidgetInformant::calculateIconsLayoutItemSizeHints(QVector<qreal>& logicalHeightHints, qreal& logicalWidthHint, const KItemListView* view) const
 142 {
 143     const KItemListStyleOption& option = view->styleOption();
 144     const QFont& normalFont = option.font;
 145     const int additionalRolesCount = qMax(view->visibleRoles().count() - 1, 0);
 146
 147     const qreal itemWidth = view->itemSize().width();
 148     const qreal maxWidth = itemWidth - 2 * option.padding;
 149     const qreal additionalRolesSpacing = additionalRolesCount * option.fontMetrics.lineSpacing();
 150     const qreal spacingAndIconHeight = option.iconSize + option.padding * 3;
 151
 152     const QFont linkFont = customizedFontForLinks(normalFont);
 153
 154     QTextOption textOption(Qt::AlignHCenter);
 155     textOption.setWrapMode(QTextOption::WrapAtWordBoundaryOrAnywhere);
 156
 157     for (int index = 0; index < logicalHeightHints.count(); ++index) {
 158         if (logicalHeightHints.at(index) > 0.0) {
 159             continue;
 160         }
 161
 162         // If the current item is a link, we use the customized link font instead of the normal font.
 163         const QFont& font = itemIsLink(index, view) ? linkFont : normalFont;
 164
 165         const QString& text = KStringHandler::preProcessWrap(itemText(index, view));
 166
 167         // Calculate the number of lines required for wrapping the name
 168         qreal textHeight = 0;
 169         QTextLayout layout(text, font);
 170         layout.setTextOption(textOption);
 171         layout.beginLayout();
 172         QTextLine line;
 173         int lineCount = 0;
 174         while ((line = layout.createLine()).isValid()) {
 175             line.setLineWidth(maxWidth);
 176             line.naturalTextWidth();
 177             textHeight += line.height();
 178
 179             ++lineCount;
 180             if (lineCount == option.maxTextLines) {
 181                 break;
 182             }
 183         }
 184         layout.endLayout();
 185
 186         // Add one line for each additional information
 187         textHeight += additionalRolesSpacing;
 188
 189         logicalHeightHints[index] = textHeight + spacingAndIconHeight;
 190     }
 191
 192     logicalWidthHint = itemWidth;
 193 }
 194
 195 void KStandardItemListWidgetInformant::calculateCompactLayoutItemSizeHints(QVector<qreal>& logicalHeightHints, qreal& logicalWidthHint, const KItemListView* view) const
 196 {
 197     const KItemListStyleOption& option = view->styleOption();
 198     const QFontMetrics& normalFontMetrics = option.fontMetrics;
 199     const int additionalRolesCount = qMax(view->visibleRoles().count() - 1, 0);
 200
 201     const QList<QByteArray>& visibleRoles = view->visibleRoles();
 202     const bool showOnlyTextRole = (visibleRoles.count() == 1) && (visibleRoles.first() == "text");
 203     const qreal maxWidth = option.maxTextWidth;
 204     const qreal paddingAndIconWidth = option.padding * 4 + option.iconSize;
 205     const qreal height = option.padding * 2 + qMax(option.iconSize, (1 + additionalRolesCount) * normalFontMetrics.lineSpacing());
 206
 207     const QFontMetrics linkFontMetrics(customizedFontForLinks(option.font));
 208
 209     for (int index = 0; index < logicalHeightHints.count(); ++index) {
 210         if (logicalHeightHints.at(index) > 0.0) {
 211             continue;
 212         }
 213
 214         // If the current item is a link, we use the customized link font metrics instead of the normal font metrics.
 215         const QFontMetrics& fontMetrics = itemIsLink(index, view) ? linkFontMetrics : normalFontMetrics;
 216
 217         // For each row exactly one role is shown. Calculate the maximum required width that is necessary
 218         // to show all roles without horizontal clipping.
 219         qreal maximumRequiredWidth = 0.0;
 220
 221         if (showOnlyTextRole) {
 222             maximumRequiredWidth = fontMetrics.width(itemText(index, view));
 223         } else {
 224             const QHash<QByteArray, QVariant>& values = view->model()->data(index);
 225             foreach (const QByteArray& role, visibleRoles) {
 226                 const QString& text = roleText(role, values);
 227                 const qreal requiredWidth = fontMetrics.width(text);
 228                 maximumRequiredWidth = qMax(maximumRequiredWidth, requiredWidth);
 229             }
 230         }
 231
 232         qreal width = paddingAndIconWidth + maximumRequiredWidth;
 233         if (maxWidth > 0 && width > maxWidth) {
 234             width = maxWidth;
 235         }
 236
 237         logicalHeightHints[index] = width;
 238     }
 239
 240     logicalWidthHint = height;
 241 }
 242
 243 void KStandardItemListWidgetInformant::calculateDetailsLayoutItemSizeHints(QVector<qreal>& logicalHeightHints, qreal& logicalWidthHint, const KItemListView* view) const
 244 {
 245     const KItemListStyleOption& option = view->styleOption();
 246     const qreal height = option.padding * 2 + qMax(option.iconSize, option.fontMetrics.height());
 247     logicalHeightHints.fill(height);
 248     logicalWidthHint = -1.0;
 249 }
 250
 251 KStandardItemListWidget::KStandardItemListWidget(KItemListWidgetInformant* informant, QGraphicsItem* parent) :
 252     KItemListWidget(informant, parent),
 253     m_isCut(false),
 254     m_isHidden(false),
 255     m_customizedFont(),
 256     m_customizedFontMetrics(m_customizedFont),
 257     m_isExpandable(false),
 258     m_supportsItemExpanding(false),
 259     m_dirtyLayout(true),
 260     m_dirtyContent(true),
 261     m_dirtyContentRoles(),
 262     m_layout(IconsLayout),
 263     m_pixmapPos(),
 264     m_pixmap(),
 265     m_scaledPixmapSize(),
 266     m_iconRect(),
 267     m_hoverPixmap(),
 268     m_textInfo(),
 269     m_textRect(),
 270     m_sortedVisibleRoles(),
 271     m_expansionArea(),
 272     m_customTextColor(),
 273     m_additionalInfoTextColor(),
 274     m_overlay(),
 275     m_rating(),
 276     m_roleEditor(0),
 277     m_oldRoleEditor(0)
 278 {
 279 }
 280
 281 KStandardItemListWidget::~KStandardItemListWidget()
 282 {
 283     qDeleteAll(m_textInfo);
 284     m_textInfo.clear();
 285
 286     if (m_roleEditor) {
 287         m_roleEditor->deleteLater();
 288     }
 289
 290     if (m_oldRoleEditor) {
 291         m_oldRoleEditor->deleteLater();
 292     }
 293 }
 294
 295 void KStandardItemListWidget::setLayout(Layout layout)
 296 {
 297     if (m_layout != layout) {
 298         m_layout = layout;
 299         m_dirtyLayout = true;
 300         updateAdditionalInfoTextColor();
 301         update();
 302     }
 303 }
 304
 305 KStandardItemListWidget::Layout KStandardItemListWidget::layout() const
 306 {
 307     return m_layout;
 308 }
 309
 310 void KStandardItemListWidget::setSupportsItemExpanding(bool supportsItemExpanding)
 311 {
 312     if (m_supportsItemExpanding != supportsItemExpanding) {
 313         m_supportsItemExpanding = supportsItemExpanding;
 314         m_dirtyLayout = true;
 315         update();
 316     }
 317 }
 318
 319 bool KStandardItemListWidget::supportsItemExpanding() const
 320 {
 321     return m_supportsItemExpanding;
 322 }
 323
 324 void KStandardItemListWidget::paint(QPainter* painter, const QStyleOptionGraphicsItem* option, QWidget* widget)
 325 {
 326     const_cast<KStandardItemListWidget*>(this)->triggerCacheRefreshing();
 327
 328     KItemListWidget::paint(painter, option, widget);
 329
 330     if (!m_expansionArea.isEmpty()) {
 331         drawSiblingsInformation(painter);
 332     }
 333
 334     const KItemListStyleOption& itemListStyleOption = styleOption();
 335     if (isHovered()) {
 336         if (hoverOpacity() < 1.0) {
 337             /*
 338              * Linear interpolation between m_pixmap and m_hoverPixmap.
 339              *
 340              * Note that this cannot be achieved by painting m_hoverPixmap over
 341              * m_pixmap, even if the opacities are adjusted. For details see
 342              * https://git.reviewboard.kde.org/r/109614/
 343              */
 344             // Paint pixmap1 so that pixmap1 = m_pixmap * (1.0 - hoverOpacity())
 345             QPixmap pixmap1(m_pixmap.size());
 346             pixmap1.fill(Qt::transparent);
 347             {
 348                 QPainter p(&pixmap1);
 349                 p.setOpacity(1.0 - hoverOpacity());
 350                 p.drawPixmap(0, 0, m_pixmap);
 351             }
 352
 353             // Paint pixmap2 so that pixmap2 = m_hoverPixmap * hoverOpacity()
 354             QPixmap pixmap2(pixmap1.size());
 355             pixmap2.fill(Qt::transparent);
 356             {
 357                 QPainter p(&pixmap2);
 358                 p.setOpacity(hoverOpacity());
 359                 p.drawPixmap(0, 0, m_hoverPixmap);
 360             }
 361
 362             // Paint pixmap2 on pixmap1 using CompositionMode_Plus
 363             // Now pixmap1 = pixmap2 + m_pixmap * (1.0 - hoverOpacity())
 364             //             = m_hoverPixmap * hoverOpacity() + m_pixmap * (1.0 - hoverOpacity())
 365             {
 366                 QPainter p(&pixmap1);
 367                 p.setCompositionMode(QPainter::CompositionMode_Plus);
 368                 p.drawPixmap(0, 0, pixmap2);
 369             }
 370
 371             // Finally paint pixmap1 on the widget
 372             drawPixmap(painter, pixmap1);
 373         } else {
 374             drawPixmap(painter, m_hoverPixmap);
 375         }
 376     } else {
 377         drawPixmap(painter, m_pixmap);
 378     }
 379
 380     painter->setFont(m_customizedFont);
 381     painter->setPen(textColor());
 382     const TextInfo* textInfo = m_textInfo.value("text");
 383
 384     if (!textInfo) {
 385         // It seems that we can end up here even if m_textInfo does not contain
 386         // the key "text", see bug 306167. According to triggerCacheRefreshing(),
 387         // this can only happen if the index is negative. This can happen when
 388         // the item is about to be removed, see KItemListView::slotItemsRemoved().
 389         // TODO: try to reproduce the crash and find a better fix.
 390         return;
 391     }
 392
 393     painter->drawStaticText(textInfo->pos, textInfo->staticText);
 394
 395     bool clipAdditionalInfoBounds = false;
 396     if (m_supportsItemExpanding) {
 397         // Prevent a possible overlapping of the additional-information texts
 398         // with the icon. This can happen if the user has minimized the width
 399         // of the name-column to a very small value.
 400         const qreal minX = m_pixmapPos.x() + m_pixmap.width() + 4 * itemListStyleOption.padding;
 401         if (textInfo->pos.x() + columnWidth("text") > minX) {
 402             clipAdditionalInfoBounds = true;
 403             painter->save();
 404             painter->setClipRect(minX, 0, size().width() - minX, size().height(), Qt::IntersectClip);
 405         }
 406     }
 407
 408     painter->setPen(m_additionalInfoTextColor);
 409     painter->setFont(m_customizedFont);
 410
 411     for (int i = 1; i < m_sortedVisibleRoles.count(); ++i) {
 412         const TextInfo* textInfo = m_textInfo.value(m_sortedVisibleRoles[i]);
 413         painter->drawStaticText(textInfo->pos, textInfo->staticText);
 414     }
 415
 416     if (!m_rating.isNull()) {
 417         const TextInfo* ratingTextInfo = m_textInfo.value("rating");
 418         QPointF pos = ratingTextInfo->pos;
 419         const Qt::Alignment align = ratingTextInfo->staticText.textOption().alignment();
 420         if (align & Qt::AlignHCenter) {
 421             pos.rx() += (size().width() - m_rating.width()) / 2 - 2;
 422         }
 423         painter->drawPixmap(pos, m_rating);
 424     }
 425
 426     if (clipAdditionalInfoBounds) {
 427         painter->restore();
 428     }
 429
 430 #ifdef KSTANDARDITEMLISTWIDGET_DEBUG
 431     painter->setBrush(Qt::NoBrush);
 432     painter->setPen(Qt::green);
 433     painter->drawRect(m_iconRect);
 434
 435     painter->setPen(Qt::blue);
 436     painter->drawRect(m_textRect);
 437
 438     painter->setPen(Qt::red);
 439     painter->drawText(QPointF(0, m_customizedFontMetrics.height()), QString::number(index()));
 440     painter->drawRect(rect());
 441 #endif
 442 }
 443
 444 QRectF KStandardItemListWidget::iconRect() const
 445 {
 446     const_cast<KStandardItemListWidget*>(this)->triggerCacheRefreshing();
 447     return m_iconRect;
 448 }
 449
 450 QRectF KStandardItemListWidget::textRect() const
 451 {
 452     const_cast<KStandardItemListWidget*>(this)->triggerCacheRefreshing();
 453     return m_textRect;
 454 }
 455
 456 QRectF KStandardItemListWidget::textFocusRect() const
 457 {
 458     // In the compact- and details-layout a larger textRect() is returned to be aligned
 459     // with the iconRect(). This is useful to have a larger selection/hover-area
 460     // when having a quite large icon size but only one line of text. Still the
 461     // focus rectangle should be shown as narrow as possible around the text.
 462
 463     const_cast<KStandardItemListWidget*>(this)->triggerCacheRefreshing();
 464
 465     switch (m_layout) {
 466     case CompactLayout: {
 467         QRectF rect = m_textRect;
 468         const TextInfo* topText    = m_textInfo.value(m_sortedVisibleRoles.first());
 469         const TextInfo* bottomText = m_textInfo.value(m_sortedVisibleRoles.last());
 470         rect.setTop(topText->pos.y());
 471         rect.setBottom(bottomText->pos.y() + bottomText->staticText.size().height());
 472         return rect;
 473     }
 474
 475     case DetailsLayout: {
 476         QRectF rect = m_textRect;
 477         const TextInfo* textInfo = m_textInfo.value(m_sortedVisibleRoles.first());
 478         rect.setTop(textInfo->pos.y());
 479         rect.setBottom(textInfo->pos.y() + textInfo->staticText.size().height());
 480
 481         const KItemListStyleOption& option = styleOption();
 482         if (option.extendedSelectionRegion) {
 483             const QString text = textInfo->staticText.text();
 484             rect.setWidth(m_customizedFontMetrics.width(text) + 2 * option.padding);
 485         }
 486
 487         return rect;
 488     }
 489
 490     default:
 491         break;
 492     }
 493
 494     return m_textRect;
 495 }
 496
 497 QRectF KStandardItemListWidget::selectionRect() const
 498 {
 499     const_cast<KStandardItemListWidget*>(this)->triggerCacheRefreshing();
 500
 501     switch (m_layout) {
 502     case IconsLayout:
 503         return m_textRect;
 504
 505     case CompactLayout:
 506     case DetailsLayout: {
 507         const int padding = styleOption().padding;
 508         QRectF adjustedIconRect = iconRect().adjusted(-padding, -padding, padding, padding);
 509         return adjustedIconRect | m_textRect;
 510     }
 511
 512     default:
 513         Q_ASSERT(false);
 514         break;
 515     }
 516
 517     return m_textRect;
 518 }
 519
 520 QRectF KStandardItemListWidget::expansionToggleRect() const
 521 {
 522     const_cast<KStandardItemListWidget*>(this)->triggerCacheRefreshing();
 523     return m_isExpandable ? m_expansionArea : QRectF();
 524 }
 525
 526 QRectF KStandardItemListWidget::selectionToggleRect() const
 527 {
 528     const_cast<KStandardItemListWidget*>(this)->triggerCacheRefreshing();
 529
 530     const int iconHeight = styleOption().iconSize;
 531
 532     int toggleSize = KIconLoader::SizeSmall;
 533     if (iconHeight >= KIconLoader::SizeEnormous) {
 534         toggleSize = KIconLoader::SizeMedium;
 535     } else if (iconHeight >= KIconLoader::SizeLarge) {
 536         toggleSize = KIconLoader::SizeSmallMedium;
 537     }
 538
 539     QPointF pos = iconRect().topLeft();
 540
 541     // If the selection toggle has a very small distance to the
 542     // widget borders, the size of the selection toggle will get
 543     // increased to prevent an accidental clicking of the item
 544     // when trying to hit the toggle.
 545     const int widgetHeight = size().height();
 546     const int widgetWidth = size().width();
 547     const int minMargin = 2;
 548
 549     if (toggleSize + minMargin * 2 >= widgetHeight) {
 550         pos.rx() -= (widgetHeight - toggleSize) / 2;
 551         toggleSize = widgetHeight;
 552         pos.setY(0);
 553     }
 554     if (toggleSize + minMargin * 2 >= widgetWidth) {
 555         pos.ry() -= (widgetWidth - toggleSize) / 2;
 556         toggleSize = widgetWidth;
 557         pos.setX(0);
 558     }
 559
 560     return QRectF(pos, QSizeF(toggleSize, toggleSize));
 561 }
 562
 563 QPixmap KStandardItemListWidget::createDragPixmap(const QStyleOptionGraphicsItem* option,
 564                                                   QWidget* widget)
 565 {
 566     QPixmap pixmap = KItemListWidget::createDragPixmap(option, widget);
 567     if (m_layout != DetailsLayout) {
 568         return pixmap;
 569     }
 570
 571     // Only return the content of the text-column as pixmap
 572     const int leftClip = m_pixmapPos.x();
 573
 574     const TextInfo* textInfo = m_textInfo.value("text");
 575     const int rightClip = textInfo->pos.x() +
 576                           textInfo->staticText.size().width() +
 577                           2 * styleOption().padding;
 578
 579     QPixmap clippedPixmap(rightClip - leftClip + 1, pixmap.height());
 580     clippedPixmap.fill(Qt::transparent);
 581
 582     QPainter painter(&clippedPixmap);
 583     painter.drawPixmap(-leftClip, 0, pixmap);
 584
 585     return clippedPixmap;
 586 }
 587
 588
 589 KItemListWidgetInformant* KStandardItemListWidget::createInformant()
 590 {
 591     return new KStandardItemListWidgetInformant();
 592 }
 593
 594 void KStandardItemListWidget::invalidateCache()
 595 {
 596     m_dirtyLayout = true;
 597     m_dirtyContent = true;
 598 }
 599
 600 void KStandardItemListWidget::refreshCache()
 601 {
 602 }
 603
 604 bool KStandardItemListWidget::isRoleRightAligned(const QByteArray& role) const
 605 {
 606     Q_UNUSED(role);
 607     return false;
 608 }
 609
 610 bool KStandardItemListWidget::isHidden() const
 611 {
 612     return false;
 613 }
 614
 615 QFont KStandardItemListWidget::customizedFont(const QFont& baseFont) const
 616 {
 617     return baseFont;
 618 }
 619
 620 QPalette::ColorRole KStandardItemListWidget::normalTextColorRole() const
 621 {
 622     return QPalette::Text;
 623 }
 624
 625 void KStandardItemListWidget::setTextColor(const QColor& color)
 626 {
 627     if (color != m_customTextColor) {
 628         m_customTextColor = color;
 629         updateAdditionalInfoTextColor();
 630         update();
 631     }
 632 }
 633
 634 QColor KStandardItemListWidget::textColor() const
 635 {
 636     if (!isSelected()) {
 637         if (m_isHidden) {
 638             return m_additionalInfoTextColor;
 639         } else if (m_customTextColor.isValid()) {
 640             return m_customTextColor;
 641         }
 642     }
 643
 644     const QPalette::ColorGroup group = isActiveWindow() ? QPalette::Active : QPalette::Inactive;
 645     const QPalette::ColorRole role = isSelected() ? QPalette::HighlightedText : normalTextColorRole();
 646     return styleOption().palette.color(group, role);
 647 }
 648
 649 void KStandardItemListWidget::setOverlay(const QPixmap& overlay)
 650 {
 651     m_overlay = overlay;
 652     m_dirtyContent = true;
 653     update();
 654 }
 655
 656 QPixmap KStandardItemListWidget::overlay() const
 657 {
 658     return m_overlay;
 659 }
 660
 661
 662 QString KStandardItemListWidget::roleText(const QByteArray& role,
 663                                           const QHash<QByteArray, QVariant>& values) const
 664 {
 665     return static_cast<const KStandardItemListWidgetInformant*>(informant())->roleText(role, values);
 666 }
 667
 668 void KStandardItemListWidget::dataChanged(const QHash<QByteArray, QVariant>& current,
 669                                           const QSet<QByteArray>& roles)
 670 {
 671     Q_UNUSED(current);
 672
 673     m_dirtyContent = true;
 674
 675     QSet<QByteArray> dirtyRoles;
 676     if (roles.isEmpty()) {
 677         dirtyRoles = visibleRoles().toSet();
 678     } else {
 679         dirtyRoles = roles;
 680     }
 681
 682     // The URL might have changed (i.e., if the sort order of the items has
 683     // been changed). Therefore, the "is cut" state must be updated.
 684     KFileItemClipboard* clipboard = KFileItemClipboard::instance();
 685     const QUrl itemUrl = data().value("url").value<QUrl>();
 686     m_isCut = clipboard->isCut(itemUrl);
 687
 688     // The icon-state might depend from other roles and hence is
 689     // marked as dirty whenever a role has been changed
 690     dirtyRoles.insert("iconPixmap");
 691     dirtyRoles.insert("iconName");
 692
 693     QSetIterator<QByteArray> it(dirtyRoles);
 694     while (it.hasNext()) {
 695         const QByteArray& role = it.next();
 696         m_dirtyContentRoles.insert(role);
 697     }
 698 }
 699
 700 void KStandardItemListWidget::visibleRolesChanged(const QList<QByteArray>& current,
 701                                               const QList<QByteArray>& previous)
 702 {
 703     Q_UNUSED(previous);
 704     m_sortedVisibleRoles = current;
 705     m_dirtyLayout = true;
 706 }
 707
 708 void KStandardItemListWidget::columnWidthChanged(const QByteArray& role,
 709                                              qreal current,
 710                                              qreal previous)
 711 {
 712     Q_UNUSED(role);
 713     Q_UNUSED(current);
 714     Q_UNUSED(previous);
 715     m_dirtyLayout = true;
 716 }
 717
 718 void KStandardItemListWidget::styleOptionChanged(const KItemListStyleOption& current,
 719                                              const KItemListStyleOption& previous)
 720 {
 721     Q_UNUSED(current);
 722     Q_UNUSED(previous);
 723     updateAdditionalInfoTextColor();
 724     m_dirtyLayout = true;
 725 }
 726
 727 void KStandardItemListWidget::hoveredChanged(bool hovered)
 728 {
 729     Q_UNUSED(hovered);
 730     m_dirtyLayout = true;
 731 }
 732
 733 void KStandardItemListWidget::selectedChanged(bool selected)
 734 {
 735     Q_UNUSED(selected);
 736     updateAdditionalInfoTextColor();
 737     m_dirtyContent = true;
 738 }
 739
 740 void KStandardItemListWidget::siblingsInformationChanged(const QBitArray& current, const QBitArray& previous)
 741 {
 742     Q_UNUSED(current);
 743     Q_UNUSED(previous);
 744     m_dirtyLayout = true;
 745 }
 746
 747 int KStandardItemListWidget::selectionLength(const QString& text) const
 748 {
 749     return text.length();
 750 }
 751
 752 void KStandardItemListWidget::editedRoleChanged(const QByteArray& current, const QByteArray& previous)
 753 {
 754     Q_UNUSED(previous);
 755
 756     QGraphicsView* parent = scene()->views()[0];
 757     if (current.isEmpty() || !parent || current != "text") {
 758         if (m_roleEditor) {
 759             emit roleEditingCanceled(index(), current, data().value(current));
 760
 761             disconnect(m_roleEditor, &KItemListRoleEditor::roleEditingCanceled,
 762                        this, &KStandardItemListWidget::slotRoleEditingCanceled);
 763             disconnect(m_roleEditor, &KItemListRoleEditor::roleEditingFinished,
 764                        this, &KStandardItemListWidget::slotRoleEditingFinished);
 765
 766             if (m_oldRoleEditor) {
 767                 m_oldRoleEditor->deleteLater();
 768             }
 769             m_oldRoleEditor = m_roleEditor;
 770             m_roleEditor->hide();
 771             m_roleEditor = 0;
 772         }
 773         return;
 774     }
 775
 776     Q_ASSERT(!m_roleEditor);
 777
 778     const TextInfo* textInfo = m_textInfo.value("text");
 779
 780     m_roleEditor = new KItemListRoleEditor(parent);
 781     m_roleEditor->setRole(current);
 782     m_roleEditor->setFont(styleOption().font);
 783
 784     const QString text = data().value(current).toString();
 785     m_roleEditor->setPlainText(text);
 786
 787     QTextOption textOption = textInfo->staticText.textOption();
 788     m_roleEditor->document()->setDefaultTextOption(textOption);
 789
 790     const int textSelectionLength = selectionLength(text);
 791
 792     if (textSelectionLength > 0) {
 793         QTextCursor cursor = m_roleEditor->textCursor();
 794         cursor.movePosition(QTextCursor::StartOfBlock);
 795         cursor.movePosition(QTextCursor::NextCharacter, QTextCursor::KeepAnchor, textSelectionLength);
 796         m_roleEditor->setTextCursor(cursor);
 797     }
 798
 799     connect(m_roleEditor, &KItemListRoleEditor::roleEditingCanceled,
 800             this, &KStandardItemListWidget::slotRoleEditingCanceled);
 801     connect(m_roleEditor, &KItemListRoleEditor::roleEditingFinished,
 802             this, &KStandardItemListWidget::slotRoleEditingFinished);
 803
 804     // Adjust the geometry of the editor
 805     QRectF rect = roleEditingRect(current);
 806     const int frameWidth = m_roleEditor->frameWidth();
 807     rect.adjust(-frameWidth, -frameWidth, frameWidth, frameWidth);
 808     rect.translate(pos());
 809     if (rect.right() > parent->width()) {
 810         rect.setWidth(parent->width() - rect.left());
 811     }
 812     m_roleEditor->setGeometry(rect.toRect());
 813     m_roleEditor->show();
 814     m_roleEditor->setFocus();
 815 }
 816
 817 void KStandardItemListWidget::resizeEvent(QGraphicsSceneResizeEvent* event)
 818 {
 819     if (m_roleEditor) {
 820         setEditedRole(QByteArray());
 821         Q_ASSERT(!m_roleEditor);
 822     }
 823
 824     KItemListWidget::resizeEvent(event);
 825
 826     m_dirtyLayout = true;
 827 }
 828
 829 void KStandardItemListWidget::showEvent(QShowEvent* event)
 830 {
 831     KItemListWidget::showEvent(event);
 832
 833     // Listen to changes of the clipboard to mark the item as cut/uncut
 834     KFileItemClipboard* clipboard = KFileItemClipboard::instance();
 835
 836     const QUrl itemUrl = data().value("url").value<QUrl>();
 837     m_isCut = clipboard->isCut(itemUrl);
 838
 839     connect(clipboard, &KFileItemClipboard::cutItemsChanged,
 840             this, &KStandardItemListWidget::slotCutItemsChanged);
 841 }
 842
 843 void KStandardItemListWidget::hideEvent(QHideEvent* event)
 844 {
 845     disconnect(KFileItemClipboard::instance(), &KFileItemClipboard::cutItemsChanged,
 846                this, &KStandardItemListWidget::slotCutItemsChanged);
 847
 848     KItemListWidget::hideEvent(event);
 849 }
 850
 851 void KStandardItemListWidget::slotCutItemsChanged()
 852 {
 853     const QUrl itemUrl = data().value("url").value<QUrl>();
 854     const bool isCut = KFileItemClipboard::instance()->isCut(itemUrl);
 855     if (m_isCut != isCut) {
 856         m_isCut = isCut;
 857         m_pixmap = QPixmap();
 858         m_dirtyContent = true;
 859         update();
 860     }
 861 }
 862
 863 void KStandardItemListWidget::slotRoleEditingCanceled(const QByteArray& role,
 864                                                       const QVariant& value)
 865 {
 866     closeRoleEditor();
 867     emit roleEditingCanceled(index(), role, value);
 868     setEditedRole(QByteArray());
 869 }
 870
 871 void KStandardItemListWidget::slotRoleEditingFinished(const QByteArray& role,
 872                                                       const QVariant& value)
 873 {
 874     closeRoleEditor();
 875     emit roleEditingFinished(index(), role, value);
 876     setEditedRole(QByteArray());
 877 }
 878
 879 void KStandardItemListWidget::triggerCacheRefreshing()
 880 {
 881     if ((!m_dirtyContent && !m_dirtyLayout) || index() < 0) {
 882         return;
 883     }
 884
 885     refreshCache();
 886
 887     const QHash<QByteArray, QVariant> values = data();
 888     m_isExpandable = m_supportsItemExpanding && values["isExpandable"].toBool();
 889     m_isHidden = isHidden();
 890     m_customizedFont = customizedFont(styleOption().font);
 891     m_customizedFontMetrics = QFontMetrics(m_customizedFont);
 892
 893     updateExpansionArea();
 894     updateTextsCache();
 895     updatePixmapCache();
 896
 897     m_dirtyLayout = false;
 898     m_dirtyContent = false;
 899     m_dirtyContentRoles.clear();
 900 }
 901
 902 void KStandardItemListWidget::updateExpansionArea()
 903 {
 904     if (m_supportsItemExpanding) {
 905         const QHash<QByteArray, QVariant> values = data();
 906         const int expandedParentsCount = values.value("expandedParentsCount", 0).toInt();
 907         if (expandedParentsCount >= 0) {
 908             const KItemListStyleOption& option = styleOption();
 909             const qreal widgetHeight = size().height();
 910             const qreal inc = (widgetHeight - option.iconSize) / 2;
 911             const qreal x = expandedParentsCount * widgetHeight + inc;
 912             const qreal y = inc;
 913             m_expansionArea = QRectF(x, y, option.iconSize, option.iconSize);
 914             return;
 915         }
 916     }
 917
 918     m_expansionArea = QRectF();
 919 }
 920
 921 void KStandardItemListWidget::updatePixmapCache()
 922 {
 923     // Precondition: Requires already updated m_textPos values to calculate
 924     // the remaining height when the alignment is vertical.
 925
 926     const QSizeF widgetSize = size();
 927     const bool iconOnTop = (m_layout == IconsLayout);
 928     const KItemListStyleOption& option = styleOption();
 929     const qreal padding = option.padding;
 930
 931     const int maxIconWidth = iconOnTop ? widgetSize.width() - 2 * padding : option.iconSize;
 932     const int maxIconHeight = option.iconSize;
 933
 934     const QHash<QByteArray, QVariant> values = data();
 935
 936     bool updatePixmap = (m_pixmap.width() != maxIconWidth || m_pixmap.height() != maxIconHeight);
 937     if (!updatePixmap && m_dirtyContent) {
 938         updatePixmap = m_dirtyContentRoles.isEmpty()
 939                        || m_dirtyContentRoles.contains("iconPixmap")
 940                        || m_dirtyContentRoles.contains("iconName")
 941                        || m_dirtyContentRoles.contains("iconOverlays");
 942     }
 943
 944     if (updatePixmap) {
 945         m_pixmap = values["iconPixmap"].value<QPixmap>();
 946         if (m_pixmap.isNull()) {
 947             // Use the icon that fits to the MIME-type
 948             QString iconName = values["iconName"].toString();
 949             if (iconName.isEmpty()) {
 950                 // The icon-name has not been not resolved by KFileItemModelRolesUpdater,
 951                 // use a generic icon as fallback
 952                 iconName = QLatin1String("unknown");
 953             }
 954             const QStringList overlays = values["iconOverlays"].toStringList();
 955             m_pixmap = pixmapForIcon(iconName, overlays, maxIconHeight);
 956         } else if (m_pixmap.width() != maxIconWidth || m_pixmap.height() != maxIconHeight) {
 957             // A custom pixmap has been applied. Assure that the pixmap
 958             // is scaled to the maximum available size.
 959             KPixmapModifier::scale(m_pixmap, QSize(maxIconWidth, maxIconHeight));
 960         }
 961
 962         if (m_isCut) {
 963             KIconEffect* effect = KIconLoader::global()->iconEffect();
 964             m_pixmap = effect->apply(m_pixmap, KIconLoader::Desktop, KIconLoader::DisabledState);
 965         }
 966
 967         if (m_isHidden) {
 968             KIconEffect::semiTransparent(m_pixmap);
 969         }
 970
 971         if (m_layout == IconsLayout && isSelected()) {
 972             const QColor color = palette().brush(QPalette::Normal, QPalette::Highlight).color();
 973             QImage image = m_pixmap.toImage();
 974             KIconEffect::colorize(image, color, 0.8f);
 975             m_pixmap = QPixmap::fromImage(image);
 976         }
 977     }
 978
 979     if (!m_overlay.isNull()) {
 980         QPainter painter(&m_pixmap);
 981         painter.drawPixmap(0, m_pixmap.height() - m_overlay.height(), m_overlay);
 982     }
 983
 984     int scaledIconSize = 0;
 985     if (iconOnTop) {
 986         const TextInfo* textInfo = m_textInfo.value("text");
 987         scaledIconSize = static_cast<int>(textInfo->pos.y() - 2 * padding);
 988     } else {
 989         const int textRowsCount = (m_layout == CompactLayout) ? visibleRoles().count() : 1;
 990         const qreal requiredTextHeight = textRowsCount * m_customizedFontMetrics.height();
 991         scaledIconSize = (requiredTextHeight < maxIconHeight) ?
 992                            widgetSize.height() - 2 * padding : maxIconHeight;
 993     }
 994
 995     const int maxScaledIconWidth = iconOnTop ? widgetSize.width() - 2 * padding : scaledIconSize;
 996     const int maxScaledIconHeight = scaledIconSize;
 997
 998     m_scaledPixmapSize = m_pixmap.size();
 999     m_scaledPixmapSize.scale(maxScaledIconWidth, maxScaledIconHeight, Qt::KeepAspectRatio);
1000
1001     if (iconOnTop) {
1002         // Center horizontally and align on bottom within the icon-area
1003         m_pixmapPos.setX((widgetSize.width() - m_scaledPixmapSize.width()) / 2);
1004         m_pixmapPos.setY(padding + scaledIconSize - m_scaledPixmapSize.height());
1005     } else {
1006         // Center horizontally and vertically within the icon-area
1007         const TextInfo* textInfo = m_textInfo.value("text");
1008         m_pixmapPos.setX(textInfo->pos.x() - 2 * padding
1009                          - (scaledIconSize + m_scaledPixmapSize.width()) / 2);
1010         m_pixmapPos.setY(padding
1011                          + (scaledIconSize - m_scaledPixmapSize.height()) / 2);
1012     }
1013
1014     m_iconRect = QRectF(m_pixmapPos, QSizeF(m_scaledPixmapSize));
1015
1016     // Prepare the pixmap that is used when the item gets hovered
1017     if (isHovered()) {
1018         m_hoverPixmap = m_pixmap;
1019         KIconEffect* effect = KIconLoader::global()->iconEffect();
1020         // In the KIconLoader terminology, active = hover.
1021         if (effect->hasEffect(KIconLoader::Desktop, KIconLoader::ActiveState)) {
1022             m_hoverPixmap = effect->apply(m_pixmap, KIconLoader::Desktop, KIconLoader::ActiveState);
1023         } else {
1024             m_hoverPixmap = m_pixmap;
1025         }
1026     } else if (hoverOpacity() <= 0.0) {
1027         // No hover animation is ongoing. Clear m_hoverPixmap to save memory.
1028         m_hoverPixmap = QPixmap();
1029     }
1030 }
1031
1032 void KStandardItemListWidget::updateTextsCache()
1033 {
1034     QTextOption textOption;
1035     switch (m_layout) {
1036     case IconsLayout:
1037         textOption.setWrapMode(QTextOption::WrapAtWordBoundaryOrAnywhere);
1038         textOption.setAlignment(Qt::AlignHCenter);
1039         break;
1040     case CompactLayout:
1041     case DetailsLayout:
1042         textOption.setAlignment(Qt::AlignLeft);
1043         textOption.setWrapMode(QTextOption::NoWrap);
1044         break;
1045     default:
1046         Q_ASSERT(false);
1047         break;
1048     }
1049
1050     qDeleteAll(m_textInfo);
1051     m_textInfo.clear();
1052     for (int i = 0; i < m_sortedVisibleRoles.count(); ++i) {
1053         TextInfo* textInfo = new TextInfo();
1054         textInfo->staticText.setTextFormat(Qt::PlainText);
1055         textInfo->staticText.setPerformanceHint(QStaticText::AggressiveCaching);
1056         textInfo->staticText.setTextOption(textOption);
1057         m_textInfo.insert(m_sortedVisibleRoles[i], textInfo);
1058     }
1059
1060     switch (m_layout) {
1061     case IconsLayout:   updateIconsLayoutTextCache(); break;
1062     case CompactLayout: updateCompactLayoutTextCache(); break;
1063     case DetailsLayout: updateDetailsLayoutTextCache(); break;
1064     default: Q_ASSERT(false); break;
1065     }
1066
1067     const TextInfo* ratingTextInfo = m_textInfo.value("rating");
1068     if (ratingTextInfo) {
1069         // The text of the rating-role has been set to empty to get
1070         // replaced by a rating-image showing the rating as stars.
1071         const KItemListStyleOption& option = styleOption();
1072         QSizeF ratingSize = preferredRatingSize(option);
1073
1074         const qreal availableWidth = (m_layout == DetailsLayout)
1075                                      ? columnWidth("rating") - columnPadding(option)
1076                                      : size().width();
1077         if (ratingSize.width() > availableWidth) {
1078             ratingSize.rwidth() = availableWidth;
1079         }
1080         m_rating = QPixmap(ratingSize.toSize());
1081         m_rating.fill(Qt::transparent);
1082
1083         QPainter painter(&m_rating);
1084         const QRect rect(0, 0, m_rating.width(), m_rating.height());
1085         const int rating = data().value("rating").toInt();
1086         KRatingPainter::paintRating(&painter, rect, Qt::AlignJustify | Qt::AlignVCenter, rating);
1087     } else if (!m_rating.isNull()) {
1088         m_rating = QPixmap();
1089     }
1090 }
1091
1092 void KStandardItemListWidget::updateIconsLayoutTextCache()
1093 {
1094     //      +------+
1095     //      | Icon |
1096     //      +------+
1097     //
1098     //    Name role that
1099     // might get wrapped above
1100     //    several lines.
1101     //  Additional role 1
1102     //  Additional role 2
1103
1104     const QHash<QByteArray, QVariant> values = data();
1105
1106     const KItemListStyleOption& option = styleOption();
1107     const qreal padding = option.padding;
1108     const qreal maxWidth = size().width() - 2 * padding;
1109     const qreal widgetHeight = size().height();
1110     const qreal lineSpacing = m_customizedFontMetrics.lineSpacing();
1111
1112     // Initialize properties for the "text" role. It will be used as anchor
1113     // for initializing the position of the other roles.
1114     TextInfo* nameTextInfo = m_textInfo.value("text");
1115     const QString nameText = KStringHandler::preProcessWrap(values["text"].toString());
1116     nameTextInfo->staticText.setText(nameText);
1117
1118     // Calculate the number of lines required for the name and the required width
1119     qreal nameWidth = 0;
1120     qreal nameHeight = 0;
1121     QTextLine line;
1122
1123     QTextLayout layout(nameTextInfo->staticText.text(), m_customizedFont);
1124     layout.setTextOption(nameTextInfo->staticText.textOption());
1125     layout.beginLayout();
1126     int nameLineIndex = 0;
1127     while ((line = layout.createLine()).isValid()) {
1128         line.setLineWidth(maxWidth);
1129         nameWidth = qMax(nameWidth, line.naturalTextWidth());
1130         nameHeight += line.height();
1131
1132         ++nameLineIndex;
1133         if (nameLineIndex == option.maxTextLines) {
1134             // The maximum number of textlines has been reached. If this is
1135             // the case provide an elided text if necessary.
1136             const int textLength = line.textStart() + line.textLength();
1137             if (textLength < nameText.length()) {
1138                 // Elide the last line of the text
1139                 qreal elidingWidth = maxWidth;
1140                 qreal lastLineWidth;
1141                 do {
1142                     QString lastTextLine = nameText.mid(line.textStart());
1143                     lastTextLine = m_customizedFontMetrics.elidedText(lastTextLine,
1144                                                                       Qt::ElideRight,
1145                                                                       elidingWidth);
1146                     const QString elidedText = nameText.left(line.textStart()) + lastTextLine;
1147                     nameTextInfo->staticText.setText(elidedText);
1148
1149                     lastLineWidth = m_customizedFontMetrics.boundingRect(lastTextLine).width();
1150
1151                     // We do the text eliding in a loop with decreasing width (1 px / iteration)
1152                     // to avoid problems related to different width calculation code paths
1153                     // within Qt. (see bug 337104)
1154                     elidingWidth -= 1.0;
1155                 } while (lastLineWidth > maxWidth);
1156
1157                 nameWidth = qMax(nameWidth, lastLineWidth);
1158             }
1159             break;
1160         }
1161     }
1162     layout.endLayout();
1163
1164     // Use one line for each additional information
1165     const int additionalRolesCount = qMax(visibleRoles().count() - 1, 0);
1166     nameTextInfo->staticText.setTextWidth(maxWidth);
1167     nameTextInfo->pos = QPointF(padding, widgetHeight -
1168                                          nameHeight -
1169                                          additionalRolesCount * lineSpacing -
1170                                          padding);
1171     m_textRect = QRectF(padding + (maxWidth - nameWidth) / 2,
1172                         nameTextInfo->pos.y(),
1173                         nameWidth,
1174                         nameHeight);
1175
1176     // Calculate the position for each additional information
1177     qreal y = nameTextInfo->pos.y() + nameHeight;
1178     foreach (const QByteArray& role, m_sortedVisibleRoles) {
1179         if (role == "text") {
1180             continue;
1181         }
1182
1183         const QString text = roleText(role, values);
1184         TextInfo* textInfo = m_textInfo.value(role);
1185         textInfo->staticText.setText(text);
1186
1187         qreal requiredWidth = 0;
1188
1189         QTextLayout layout(text, m_customizedFont);
1190         QTextOption textOption;
1191         textOption.setWrapMode(QTextOption::NoWrap);
1192         layout.setTextOption(textOption);
1193
1194         layout.beginLayout();
1195         QTextLine textLine = layout.createLine();
1196         if (textLine.isValid()) {
1197             textLine.setLineWidth(maxWidth);
1198             requiredWidth = textLine.naturalTextWidth();
1199             if (requiredWidth > maxWidth) {
1200                 const QString elidedText = m_customizedFontMetrics.elidedText(text, Qt::ElideRight, maxWidth);
1201                 textInfo->staticText.setText(elidedText);
1202                 requiredWidth = m_customizedFontMetrics.width(elidedText);
1203             } else if (role == "rating") {
1204                 // Use the width of the rating pixmap, because the rating text is empty.
1205                 requiredWidth = m_rating.width();
1206             }
1207         }
1208         layout.endLayout();
1209
1210         textInfo->pos = QPointF(padding, y);
1211         textInfo->staticText.setTextWidth(maxWidth);
1212
1213         const QRectF textRect(padding + (maxWidth - requiredWidth) / 2, y, requiredWidth, lineSpacing);
1214         m_textRect |= textRect;
1215
1216         y += lineSpacing;
1217     }
1218
1219     // Add a padding to the text rectangle
1220     m_textRect.adjust(-padding, -padding, padding, padding);
1221 }
1222
1223 void KStandardItemListWidget::updateCompactLayoutTextCache()
1224 {
1225     // +------+  Name role
1226     // | Icon |  Additional role 1
1227     // +------+  Additional role 2
1228
1229     const QHash<QByteArray, QVariant> values = data();
1230
1231     const KItemListStyleOption& option = styleOption();
1232     const qreal widgetHeight = size().height();
1233     const qreal lineSpacing = m_customizedFontMetrics.lineSpacing();
1234     const qreal textLinesHeight = qMax(visibleRoles().count(), 1) * lineSpacing;
1235     const int scaledIconSize = (textLinesHeight < option.iconSize) ? widgetHeight - 2 * option.padding : option.iconSize;
1236
1237     qreal maximumRequiredTextWidth = 0;
1238     const qreal x = option.padding * 3 + scaledIconSize;
1239     qreal y = qRound((widgetHeight - textLinesHeight) / 2);
1240     const qreal maxWidth = size().width() - x - option.padding;
1241     foreach (const QByteArray& role, m_sortedVisibleRoles) {
1242         const QString text = roleText(role, values);
1243         TextInfo* textInfo = m_textInfo.value(role);
1244         textInfo->staticText.setText(text);
1245
1246         qreal requiredWidth = m_customizedFontMetrics.width(text);
1247         if (requiredWidth > maxWidth) {
1248             requiredWidth = maxWidth;
1249             const QString elidedText = m_customizedFontMetrics.elidedText(text, Qt::ElideRight, maxWidth);
1250             textInfo->staticText.setText(elidedText);
1251         }
1252
1253         textInfo->pos = QPointF(x, y);
1254         textInfo->staticText.setTextWidth(maxWidth);
1255
1256         maximumRequiredTextWidth = qMax(maximumRequiredTextWidth, requiredWidth);
1257
1258         y += lineSpacing;
1259     }
1260
1261     m_textRect = QRectF(x - 2 * option.padding, 0, maximumRequiredTextWidth + 3 * option.padding, widgetHeight);
1262 }
1263
1264 void KStandardItemListWidget::updateDetailsLayoutTextCache()
1265 {
1266     // Precondition: Requires already updated m_expansionArea
1267     // to determine the left position.
1268
1269     // +------+
1270     // | Icon |  Name role   Additional role 1   Additional role 2
1271     // +------+
1272     m_textRect = QRectF();
1273
1274     const KItemListStyleOption& option = styleOption();
1275     const QHash<QByteArray, QVariant> values = data();
1276
1277     const qreal widgetHeight = size().height();
1278     const int scaledIconSize = widgetHeight - 2 * option.padding;
1279     const int fontHeight = m_customizedFontMetrics.height();
1280
1281     const qreal columnWidthInc = columnPadding(option);
1282     qreal firstColumnInc = scaledIconSize;
1283     if (m_supportsItemExpanding) {
1284         firstColumnInc += (m_expansionArea.left() + m_expansionArea.right() + widgetHeight) / 2;
1285     } else {
1286         firstColumnInc += option.padding;
1287     }
1288
1289     qreal x = firstColumnInc;
1290     const qreal y = qMax(qreal(option.padding), (widgetHeight - fontHeight) / 2);
1291
1292     foreach (const QByteArray& role, m_sortedVisibleRoles) {
1293         QString text = roleText(role, values);
1294
1295         // Elide the text in case it does not fit into the available column-width
1296         qreal requiredWidth = m_customizedFontMetrics.width(text);
1297         const qreal roleWidth = columnWidth(role);
1298         qreal availableTextWidth = roleWidth - columnWidthInc;
1299
1300         const bool isTextRole = (role == "text");
1301         if (isTextRole) {
1302             availableTextWidth -= firstColumnInc;
1303         }
1304
1305         if (requiredWidth > availableTextWidth) {
1306             text = m_customizedFontMetrics.elidedText(text, Qt::ElideRight, availableTextWidth);
1307             requiredWidth = m_customizedFontMetrics.width(text);
1308         }
1309
1310         TextInfo* textInfo = m_textInfo.value(role);
1311         textInfo->staticText.setText(text);
1312         textInfo->pos = QPointF(x + columnWidthInc / 2, y);
1313         x += roleWidth;
1314
1315         if (isTextRole) {
1316             const qreal textWidth = option.extendedSelectionRegion
1317                                     ? size().width() - textInfo->pos.x()
1318                                     : requiredWidth + 2 * option.padding;
1319             m_textRect = QRectF(textInfo->pos.x() - 2 * option.padding, 0,
1320                                 textWidth + option.padding, size().height());
1321
1322             // The column after the name should always be aligned on the same x-position independent
1323             // from the expansion-level shown in the name column
1324             x -= firstColumnInc;
1325         } else if (isRoleRightAligned(role)) {
1326             textInfo->pos.rx() += roleWidth - requiredWidth - columnWidthInc;
1327         }
1328     }
1329 }
1330
1331 void KStandardItemListWidget::updateAdditionalInfoTextColor()
1332 {
1333     QColor c1;
1334     if (m_customTextColor.isValid()) {
1335         c1 = m_customTextColor;
1336     } else if (isSelected() && m_layout != DetailsLayout) {
1337         c1 = styleOption().palette.highlightedText().color();
1338     } else {
1339         c1 = styleOption().palette.text().color();
1340     }
1341
1342     // For the color of the additional info the inactive text color
1343     // is not used as this might lead to unreadable text for some color schemes. Instead
1344     // the text color c1 is slightly mixed with the background color.
1345     const QColor c2 = styleOption().palette.base().color();
1346     const int p1 = 70;
1347     const int p2 = 100 - p1;
1348     m_additionalInfoTextColor = QColor((c1.red()   * p1 + c2.red()   * p2) / 100,
1349                                        (c1.green() * p1 + c2.green() * p2) / 100,
1350                                        (c1.blue()  * p1 + c2.blue()  * p2) / 100);
1351 }
1352
1353 void KStandardItemListWidget::drawPixmap(QPainter* painter, const QPixmap& pixmap)
1354 {
1355     if (m_scaledPixmapSize != pixmap.size()) {
1356         QPixmap scaledPixmap = pixmap;
1357         KPixmapModifier::scale(scaledPixmap, m_scaledPixmapSize);
1358         painter->drawPixmap(m_pixmapPos, scaledPixmap);
1359
1360 #ifdef KSTANDARDITEMLISTWIDGET_DEBUG
1361         painter->setPen(Qt::blue);
1362         painter->drawRect(QRectF(m_pixmapPos, QSizeF(m_scaledPixmapSize)));
1363 #endif
1364     } else {
1365         painter->drawPixmap(m_pixmapPos, pixmap);
1366     }
1367 }
1368
1369 void KStandardItemListWidget::drawSiblingsInformation(QPainter* painter)
1370 {
1371     const int siblingSize = size().height();
1372     const int x = (m_expansionArea.left() + m_expansionArea.right() - siblingSize) / 2;
1373     QRect siblingRect(x, 0, siblingSize, siblingSize);
1374
1375     QStyleOption option;
1376     option.palette.setColor(QPalette::Text, option.palette.color(normalTextColorRole()));
1377     bool isItemSibling = true;
1378
1379     const QBitArray siblings = siblingsInformation();
1380     for (int i = siblings.count() - 1; i >= 0; --i) {
1381         option.rect = siblingRect;
1382         option.state = siblings.at(i) ? QStyle::State_Sibling : QStyle::State_None;
1383
1384         if (isItemSibling) {
1385             option.state |= QStyle::State_Item;
1386             if (m_isExpandable) {
1387                 option.state |= QStyle::State_Children;
1388             }
1389             if (data()["isExpanded"].toBool()) {
1390                 option.state |= QStyle::State_Open;
1391             }
1392             isItemSibling = false;
1393         }
1394
1395         style()->drawPrimitive(QStyle::PE_IndicatorBranch, &option, painter);
1396
1397         siblingRect.translate(-siblingRect.width(), 0);
1398     }
1399 }
1400
1401 QRectF KStandardItemListWidget::roleEditingRect(const QByteArray& role) const
1402 {
1403     const TextInfo* textInfo = m_textInfo.value(role);
1404     if (!textInfo) {
1405         return QRectF();
1406     }
1407
1408     QRectF rect(textInfo->pos, textInfo->staticText.size());
1409     if (m_layout == DetailsLayout) {
1410         rect.setWidth(columnWidth(role) - rect.x());
1411     }
1412
1413     return rect;
1414 }
1415
1416 void KStandardItemListWidget::closeRoleEditor()
1417 {
1418     disconnect(m_roleEditor, &KItemListRoleEditor::roleEditingCanceled,
1419                this, &KStandardItemListWidget::slotRoleEditingCanceled);
1420     disconnect(m_roleEditor, &KItemListRoleEditor::roleEditingFinished,
1421                this, &KStandardItemListWidget::slotRoleEditingFinished);
1422
1423     if (m_roleEditor->hasFocus()) {
1424         // If the editing was not ended by a FocusOut event, we have
1425         // to transfer the keyboard focus back to the KItemListContainer.
1426         scene()->views()[0]->parentWidget()->setFocus();
1427     }
1428
1429     if (m_oldRoleEditor) {
1430         m_oldRoleEditor->deleteLater();
1431     }
1432     m_oldRoleEditor = m_roleEditor;
1433     m_roleEditor->hide();
1434     m_roleEditor = 0;
1435 }
1436
1437 QPixmap KStandardItemListWidget::pixmapForIcon(const QString& name, const QStringList& overlays, int size)
1438 {
1439     const QString key = "KStandardItemListWidget:" % name % ":" % overlays.join(":") % ":" % QString::number(size);
1440     QPixmap pixmap;
1441
1442     if (!QPixmapCache::find(key, pixmap)) {
1443         const QIcon icon = QIcon::fromTheme(name);
1444
1445         int requestedSize;
1446         if (size <= KIconLoader::SizeSmall) {
1447             requestedSize = KIconLoader::SizeSmall;
1448         } else if (size <= KIconLoader::SizeSmallMedium) {
1449             requestedSize = KIconLoader::SizeSmallMedium;
1450         } else if (size <= KIconLoader::SizeMedium) {
1451             requestedSize = KIconLoader::SizeMedium;
1452         } else if (size <= KIconLoader::SizeLarge) {
1453             requestedSize = KIconLoader::SizeLarge;
1454         } else if (size <= KIconLoader::SizeHuge) {
1455             requestedSize = KIconLoader::SizeHuge;
1456         } else if (size <= KIconLoader::SizeEnormous) {
1457             requestedSize = KIconLoader::SizeEnormous;
1458         } else if (size <= KIconLoader::SizeEnormous * 2) {
1459             requestedSize = KIconLoader::SizeEnormous * 2;
1460         } else {
1461             requestedSize = size;
1462         }
1463
1464         pixmap = icon.pixmap(requestedSize, requestedSize);
1465         if (requestedSize != size) {
1466             KPixmapModifier::scale(pixmap, QSize(size, size));
1467         }
1468
1469         // Strangely KFileItem::overlays() returns empty string-values, so
1470         // we need to check first whether an overlay must be drawn at all.
1471         // It is more efficient to do it here, as KIconLoader::drawOverlays()
1472         // assumes that an overlay will be drawn and has some additional
1473         // setup time.
1474         foreach (const QString& overlay, overlays) {
1475             if (!overlay.isEmpty()) {
1476                 // There is at least one overlay, draw all overlays above m_pixmap
1477                 // and cancel the check
1478                 KIconLoader::global()->drawOverlays(overlays, pixmap, KIconLoader::Desktop);
1479                 break;
1480             }
1481         }
1482
1483         QPixmapCache::insert(key, pixmap);
1484     }
1485
1486     return pixmap;
1487 }
1488
1489 QSizeF KStandardItemListWidget::preferredRatingSize(const KItemListStyleOption& option)
1490 {
1491     const qreal height = option.fontMetrics.ascent();
1492     return QSizeF(height * 5, height);
1493 }
1494
1495 qreal KStandardItemListWidget::columnPadding(const KItemListStyleOption& option)
1496 {
1497     return option.padding * 6;
1498 }
1499