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 <KIcon>
  26 #include <KIconEffect>
  27 #include <KIconLoader>
  28 #include <KLocale>
  29 #include <kratingpainter.h>
  30 #include <KStringHandler>
  31 #include <KDebug>
  32
  33 #include "private/kfileitemclipboard.h"
  34 #include "private/kitemlistroleeditor.h"
  35 #include "private/kpixmapmodifier.h"
  36
  37 #include <QFontMetricsF>
  38 #include <QGraphicsScene>
  39 #include <QGraphicsSceneResizeEvent>
  40 #include <QGraphicsView>
  41 #include <QPainter>
  42 #include <QStyleOption>
  43 #include <QTextLayout>
  44 #include <QTextLine>
  45 #include <QPixmapCache>
  46
  47 // #define KSTANDARDITEMLISTWIDGET_DEBUG
  48
  49 KStandardItemListWidgetInformant::KStandardItemListWidgetInformant() :
  50     KItemListWidgetInformant()
  51 {
  52 }
  53
  54 KStandardItemListWidgetInformant::~KStandardItemListWidgetInformant()
  55 {
  56 }
  57
  58 void KStandardItemListWidgetInformant::calculateItemSizeHints(QVector<qreal>& logicalHeightHints, qreal& logicalWidthHint, const KItemListView* view) const
  59 {
  60     switch (static_cast<const KStandardItemListView*>(view)->itemLayout()) {
  61     case KStandardItemListWidget::IconsLayout:
  62         calculateIconsLayoutItemSizeHints(logicalHeightHints, logicalWidthHint, view);
  63         break;
  64
  65     case KStandardItemListWidget::CompactLayout:
  66         calculateCompactLayoutItemSizeHints(logicalHeightHints, logicalWidthHint, view);
  67         break;
  68
  69     case KStandardItemListWidget::DetailsLayout:
  70         calculateDetailsLayoutItemSizeHints(logicalHeightHints, logicalWidthHint, view);
  71         break;
  72
  73     default:
  74         Q_ASSERT(false);
  75         break;
  76     }
  77 }
  78
  79 qreal KStandardItemListWidgetInformant::preferredRoleColumnWidth(const QByteArray& role,
  80                                                                  int index,
  81                                                                  const KItemListView* view) const
  82 {
  83     const QHash<QByteArray, QVariant> values = view->model()->data(index);
  84     const KItemListStyleOption& option = view->styleOption();
  85
  86     const QString text = roleText(role, values);
  87     qreal width = KStandardItemListWidget::columnPadding(option);
  88
  89     const QFontMetrics& normalFontMetrics = option.fontMetrics;
  90     const QFontMetrics linkFontMetrics(customizedFontForLinks(option.font));
  91
  92     if (role == "rating") {
  93         width += KStandardItemListWidget::preferredRatingSize(option).width();
  94     } else {
  95         // If current item is a link, we use the customized link font metrics instead of the normal font metrics.
  96         const QFontMetrics& fontMetrics = itemIsLink(index, view) ? linkFontMetrics : normalFontMetrics;
  97
  98         width += fontMetrics.width(text);
  99
 100         if (role == "text") {
 101             if (view->supportsItemExpanding()) {
 102                 // Increase the width by the expansion-toggle and the current expansion level
 103                 const int expandedParentsCount = values.value("expandedParentsCount", 0).toInt();
 104                 const qreal height = option.padding * 2 + qMax(option.iconSize, fontMetrics.height());
 105                 width += (expandedParentsCount + 1) * height;
 106             }
 107
 108             // Increase the width by the required space for the icon
 109             width += option.padding * 2 + option.iconSize;
 110         }
 111     }
 112
 113     return width;
 114 }
 115
 116 QString KStandardItemListWidgetInformant::itemText(int index, const KItemListView* view) const
 117 {
 118     return view->model()->data(index).value("text").toString();
 119 }
 120
 121 bool KStandardItemListWidgetInformant::itemIsLink(int index, const KItemListView* view) const
 122 {
 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::expansionToggleRect() const
 498 {
 499     const_cast<KStandardItemListWidget*>(this)->triggerCacheRefreshing();
 500     return m_isExpandable ? m_expansionArea : QRectF();
 501 }
 502
 503 QRectF KStandardItemListWidget::selectionToggleRect() const
 504 {
 505     const_cast<KStandardItemListWidget*>(this)->triggerCacheRefreshing();
 506
 507     const int iconHeight = styleOption().iconSize;
 508
 509     int toggleSize = KIconLoader::SizeSmall;
 510     if (iconHeight >= KIconLoader::SizeEnormous) {
 511         toggleSize = KIconLoader::SizeMedium;
 512     } else if (iconHeight >= KIconLoader::SizeLarge) {
 513         toggleSize = KIconLoader::SizeSmallMedium;
 514     }
 515
 516     QPointF pos = iconRect().topLeft();
 517
 518     // If the selection toggle has a very small distance to the
 519     // widget borders, the size of the selection toggle will get
 520     // increased to prevent an accidental clicking of the item
 521     // when trying to hit the toggle.
 522     const int widgetHeight = size().height();
 523     const int widgetWidth = size().width();
 524     const int minMargin = 2;
 525
 526     if (toggleSize + minMargin * 2 >= widgetHeight) {
 527         pos.rx() -= (widgetHeight - toggleSize) / 2;
 528         toggleSize = widgetHeight;
 529         pos.setY(0);
 530     }
 531     if (toggleSize + minMargin * 2 >= widgetWidth) {
 532         pos.ry() -= (widgetWidth - toggleSize) / 2;
 533         toggleSize = widgetWidth;
 534         pos.setX(0);
 535     }
 536
 537     return QRectF(pos, QSizeF(toggleSize, toggleSize));
 538 }
 539
 540 QPixmap KStandardItemListWidget::createDragPixmap(const QStyleOptionGraphicsItem* option,
 541                                                   QWidget* widget)
 542 {
 543     QPixmap pixmap = KItemListWidget::createDragPixmap(option, widget);
 544     if (m_layout != DetailsLayout) {
 545         return pixmap;
 546     }
 547
 548     // Only return the content of the text-column as pixmap
 549     const int leftClip = m_pixmapPos.x();
 550
 551     const TextInfo* textInfo = m_textInfo.value("text");
 552     const int rightClip = textInfo->pos.x() +
 553                           textInfo->staticText.size().width() +
 554                           2 * styleOption().padding;
 555
 556     QPixmap clippedPixmap(rightClip - leftClip + 1, pixmap.height());
 557     clippedPixmap.fill(Qt::transparent);
 558
 559     QPainter painter(&clippedPixmap);
 560     painter.drawPixmap(-leftClip, 0, pixmap);
 561
 562     return clippedPixmap;
 563 }
 564
 565
 566 KItemListWidgetInformant* KStandardItemListWidget::createInformant()
 567 {
 568     return new KStandardItemListWidgetInformant();
 569 }
 570
 571 void KStandardItemListWidget::invalidateCache()
 572 {
 573     m_dirtyLayout = true;
 574     m_dirtyContent = true;
 575 }
 576
 577 void KStandardItemListWidget::refreshCache()
 578 {
 579 }
 580
 581 bool KStandardItemListWidget::isRoleRightAligned(const QByteArray& role) const
 582 {
 583     Q_UNUSED(role);
 584     return false;
 585 }
 586
 587 bool KStandardItemListWidget::isHidden() const
 588 {
 589     return false;
 590 }
 591
 592 QFont KStandardItemListWidget::customizedFont(const QFont& baseFont) const
 593 {
 594     return baseFont;
 595 }
 596
 597 QPalette::ColorRole KStandardItemListWidget::normalTextColorRole() const
 598 {
 599     return QPalette::Text;
 600 }
 601
 602 void KStandardItemListWidget::setTextColor(const QColor& color)
 603 {
 604     if (color != m_customTextColor) {
 605         m_customTextColor = color;
 606         updateAdditionalInfoTextColor();
 607         update();
 608     }
 609 }
 610
 611 QColor KStandardItemListWidget::textColor() const
 612 {
 613     if (!isSelected()) {
 614         if (m_isHidden) {
 615             return m_additionalInfoTextColor;
 616         } else if (m_customTextColor.isValid()) {
 617             return m_customTextColor;
 618         }
 619     }
 620
 621     const QPalette::ColorGroup group = isActiveWindow() ? QPalette::Active : QPalette::Inactive;
 622     const QPalette::ColorRole role = isSelected() ? QPalette::HighlightedText : normalTextColorRole();
 623     return styleOption().palette.color(group, role);
 624 }
 625
 626 void KStandardItemListWidget::setOverlay(const QPixmap& overlay)
 627 {
 628     m_overlay = overlay;
 629     m_dirtyContent = true;
 630     update();
 631 }
 632
 633 QPixmap KStandardItemListWidget::overlay() const
 634 {
 635     return m_overlay;
 636 }
 637
 638
 639 QString KStandardItemListWidget::roleText(const QByteArray& role,
 640                                           const QHash<QByteArray, QVariant>& values) const
 641 {
 642     return static_cast<const KStandardItemListWidgetInformant*>(informant())->roleText(role, values);
 643 }
 644
 645 void KStandardItemListWidget::dataChanged(const QHash<QByteArray, QVariant>& current,
 646                                           const QSet<QByteArray>& roles)
 647 {
 648     Q_UNUSED(current);
 649
 650     m_dirtyContent = true;
 651
 652     QSet<QByteArray> dirtyRoles;
 653     if (roles.isEmpty()) {
 654         dirtyRoles = visibleRoles().toSet();
 655     } else {
 656         dirtyRoles = roles;
 657     }
 658
 659     // The URL might have changed (i.e., if the sort order of the items has
 660     // been changed). Therefore, the "is cut" state must be updated.
 661     KFileItemClipboard* clipboard = KFileItemClipboard::instance();
 662     const KUrl itemUrl = data().value("url").value<KUrl>();
 663     m_isCut = clipboard->isCut(itemUrl);
 664
 665     // The icon-state might depend from other roles and hence is
 666     // marked as dirty whenever a role has been changed
 667     dirtyRoles.insert("iconPixmap");
 668     dirtyRoles.insert("iconName");
 669
 670     QSetIterator<QByteArray> it(dirtyRoles);
 671     while (it.hasNext()) {
 672         const QByteArray& role = it.next();
 673         m_dirtyContentRoles.insert(role);
 674     }
 675 }
 676
 677 void KStandardItemListWidget::visibleRolesChanged(const QList<QByteArray>& current,
 678                                               const QList<QByteArray>& previous)
 679 {
 680     Q_UNUSED(previous);
 681     m_sortedVisibleRoles = current;
 682     m_dirtyLayout = true;
 683 }
 684
 685 void KStandardItemListWidget::columnWidthChanged(const QByteArray& role,
 686                                              qreal current,
 687                                              qreal previous)
 688 {
 689     Q_UNUSED(role);
 690     Q_UNUSED(current);
 691     Q_UNUSED(previous);
 692     m_dirtyLayout = true;
 693 }
 694
 695 void KStandardItemListWidget::styleOptionChanged(const KItemListStyleOption& current,
 696                                              const KItemListStyleOption& previous)
 697 {
 698     Q_UNUSED(current);
 699     Q_UNUSED(previous);
 700     updateAdditionalInfoTextColor();
 701     m_dirtyLayout = true;
 702 }
 703
 704 void KStandardItemListWidget::hoveredChanged(bool hovered)
 705 {
 706     Q_UNUSED(hovered);
 707     m_dirtyLayout = true;
 708 }
 709
 710 void KStandardItemListWidget::selectedChanged(bool selected)
 711 {
 712     Q_UNUSED(selected);
 713     updateAdditionalInfoTextColor();
 714     m_dirtyContent = true;
 715 }
 716
 717 void KStandardItemListWidget::siblingsInformationChanged(const QBitArray& current, const QBitArray& previous)
 718 {
 719     Q_UNUSED(current);
 720     Q_UNUSED(previous);
 721     m_dirtyLayout = true;
 722 }
 723
 724 int KStandardItemListWidget::selectionLength(const QString& text) const
 725 {
 726     return text.length();
 727 }
 728
 729 void KStandardItemListWidget::editedRoleChanged(const QByteArray& current, const QByteArray& previous)
 730 {
 731     Q_UNUSED(previous);
 732
 733     QGraphicsView* parent = scene()->views()[0];
 734     if (current.isEmpty() || !parent || current != "text") {
 735         if (m_roleEditor) {
 736             emit roleEditingCanceled(index(), current, data().value(current));
 737
 738             disconnect(m_roleEditor, SIGNAL(roleEditingCanceled(QByteArray,QVariant)),
 739                        this, SLOT(slotRoleEditingCanceled(QByteArray,QVariant)));
 740             disconnect(m_roleEditor, SIGNAL(roleEditingFinished(QByteArray,QVariant)),
 741                        this, SLOT(slotRoleEditingFinished(QByteArray,QVariant)));
 742
 743             if (m_oldRoleEditor) {
 744                 m_oldRoleEditor->deleteLater();
 745             }
 746             m_oldRoleEditor = m_roleEditor;
 747             m_roleEditor->hide();
 748             m_roleEditor = 0;
 749         }
 750         return;
 751     }
 752
 753     Q_ASSERT(!m_roleEditor);
 754
 755     const TextInfo* textInfo = m_textInfo.value("text");
 756
 757     m_roleEditor = new KItemListRoleEditor(parent);
 758     m_roleEditor->setRole(current);
 759     m_roleEditor->setFont(styleOption().font);
 760
 761     const QString text = data().value(current).toString();
 762     m_roleEditor->setPlainText(text);
 763
 764     QTextOption textOption = textInfo->staticText.textOption();
 765     m_roleEditor->document()->setDefaultTextOption(textOption);
 766
 767     const int textSelectionLength = selectionLength(text);
 768
 769     if (textSelectionLength > 0) {
 770         QTextCursor cursor = m_roleEditor->textCursor();
 771         cursor.movePosition(QTextCursor::StartOfBlock);
 772         cursor.movePosition(QTextCursor::NextCharacter, QTextCursor::KeepAnchor, textSelectionLength);
 773         m_roleEditor->setTextCursor(cursor);
 774     }
 775
 776     connect(m_roleEditor, SIGNAL(roleEditingCanceled(QByteArray,QVariant)),
 777             this, SLOT(slotRoleEditingCanceled(QByteArray,QVariant)));
 778     connect(m_roleEditor, SIGNAL(roleEditingFinished(QByteArray,QVariant)),
 779             this, SLOT(slotRoleEditingFinished(QByteArray,QVariant)));
 780
 781     // Adjust the geometry of the editor
 782     QRectF rect = roleEditingRect(current);
 783     const int frameWidth = m_roleEditor->frameWidth();
 784     rect.adjust(-frameWidth, -frameWidth, frameWidth, frameWidth);
 785     rect.translate(pos());
 786     if (rect.right() > parent->width()) {
 787         rect.setWidth(parent->width() - rect.left());
 788     }
 789     m_roleEditor->setGeometry(rect.toRect());
 790     m_roleEditor->show();
 791     m_roleEditor->setFocus();
 792 }
 793
 794 void KStandardItemListWidget::resizeEvent(QGraphicsSceneResizeEvent* event)
 795 {
 796     if (m_roleEditor) {
 797         setEditedRole(QByteArray());
 798         Q_ASSERT(!m_roleEditor);
 799     }
 800
 801     KItemListWidget::resizeEvent(event);
 802
 803     m_dirtyLayout = true;
 804 }
 805
 806 void KStandardItemListWidget::showEvent(QShowEvent* event)
 807 {
 808     KItemListWidget::showEvent(event);
 809
 810     // Listen to changes of the clipboard to mark the item as cut/uncut
 811     KFileItemClipboard* clipboard = KFileItemClipboard::instance();
 812
 813     const KUrl itemUrl = data().value("url").value<KUrl>();
 814     m_isCut = clipboard->isCut(itemUrl);
 815
 816     connect(clipboard, SIGNAL(cutItemsChanged()),
 817             this, SLOT(slotCutItemsChanged()));
 818 }
 819
 820 void KStandardItemListWidget::hideEvent(QHideEvent* event)
 821 {
 822     disconnect(KFileItemClipboard::instance(), SIGNAL(cutItemsChanged()),
 823                this, SLOT(slotCutItemsChanged()));
 824
 825     KItemListWidget::hideEvent(event);
 826 }
 827
 828 void KStandardItemListWidget::slotCutItemsChanged()
 829 {
 830     const KUrl itemUrl = data().value("url").value<KUrl>();
 831     const bool isCut = KFileItemClipboard::instance()->isCut(itemUrl);
 832     if (m_isCut != isCut) {
 833         m_isCut = isCut;
 834         m_pixmap = QPixmap();
 835         m_dirtyContent = true;
 836         update();
 837     }
 838 }
 839
 840 void KStandardItemListWidget::slotRoleEditingCanceled(const QByteArray& role,
 841                                                       const QVariant& value)
 842 {
 843     closeRoleEditor();
 844     emit roleEditingCanceled(index(), role, value);
 845     setEditedRole(QByteArray());
 846 }
 847
 848 void KStandardItemListWidget::slotRoleEditingFinished(const QByteArray& role,
 849                                                       const QVariant& value)
 850 {
 851     closeRoleEditor();
 852     emit roleEditingFinished(index(), role, value);
 853     setEditedRole(QByteArray());
 854 }
 855
 856 void KStandardItemListWidget::triggerCacheRefreshing()
 857 {
 858     if ((!m_dirtyContent && !m_dirtyLayout) || index() < 0) {
 859         return;
 860     }
 861
 862     refreshCache();
 863
 864     const QHash<QByteArray, QVariant> values = data();
 865     m_isExpandable = m_supportsItemExpanding && values["isExpandable"].toBool();
 866     m_isHidden = isHidden();
 867     m_customizedFont = customizedFont(styleOption().font);
 868     m_customizedFontMetrics = QFontMetrics(m_customizedFont);
 869
 870     updateExpansionArea();
 871     updateTextsCache();
 872     updatePixmapCache();
 873
 874     m_dirtyLayout = false;
 875     m_dirtyContent = false;
 876     m_dirtyContentRoles.clear();
 877 }
 878
 879 void KStandardItemListWidget::updateExpansionArea()
 880 {
 881     if (m_supportsItemExpanding) {
 882         const QHash<QByteArray, QVariant> values = data();
 883         const int expandedParentsCount = values.value("expandedParentsCount", 0).toInt();
 884         if (expandedParentsCount >= 0) {
 885             const KItemListStyleOption& option = styleOption();
 886             const qreal widgetHeight = size().height();
 887             const qreal inc = (widgetHeight - option.iconSize) / 2;
 888             const qreal x = expandedParentsCount * widgetHeight + inc;
 889             const qreal y = inc;
 890             m_expansionArea = QRectF(x, y, option.iconSize, option.iconSize);
 891             return;
 892         }
 893     }
 894
 895     m_expansionArea = QRectF();
 896 }
 897
 898 void KStandardItemListWidget::updatePixmapCache()
 899 {
 900     // Precondition: Requires already updated m_textPos values to calculate
 901     // the remaining height when the alignment is vertical.
 902
 903     const QSizeF widgetSize = size();
 904     const bool iconOnTop = (m_layout == IconsLayout);
 905     const KItemListStyleOption& option = styleOption();
 906     const qreal padding = option.padding;
 907
 908     const int maxIconWidth = iconOnTop ? widgetSize.width() - 2 * padding : option.iconSize;
 909     const int maxIconHeight = option.iconSize;
 910
 911     const QHash<QByteArray, QVariant> values = data();
 912
 913     bool updatePixmap = (m_pixmap.width() != maxIconWidth || m_pixmap.height() != maxIconHeight);
 914     if (!updatePixmap && m_dirtyContent) {
 915         updatePixmap = m_dirtyContentRoles.isEmpty()
 916                        || m_dirtyContentRoles.contains("iconPixmap")
 917                        || m_dirtyContentRoles.contains("iconName")
 918                        || m_dirtyContentRoles.contains("iconOverlays");
 919     }
 920
 921     if (updatePixmap) {
 922         m_pixmap = values["iconPixmap"].value<QPixmap>();
 923         if (m_pixmap.isNull()) {
 924             // Use the icon that fits to the MIME-type
 925             QString iconName = values["iconName"].toString();
 926             if (iconName.isEmpty()) {
 927                 // The icon-name has not been not resolved by KFileItemModelRolesUpdater,
 928                 // use a generic icon as fallback
 929                 iconName = QLatin1String("unknown");
 930             }
 931             const QStringList overlays = values["iconOverlays"].toStringList();
 932             m_pixmap = pixmapForIcon(iconName, overlays, maxIconHeight);
 933         } else if (m_pixmap.width() != maxIconWidth || m_pixmap.height() != maxIconHeight) {
 934             // A custom pixmap has been applied. Assure that the pixmap
 935             // is scaled to the maximum available size.
 936             KPixmapModifier::scale(m_pixmap, QSize(maxIconWidth, maxIconHeight));
 937         }
 938
 939         if (m_isCut) {
 940             KIconEffect* effect = KIconLoader::global()->iconEffect();
 941             m_pixmap = effect->apply(m_pixmap, KIconLoader::Desktop, KIconLoader::DisabledState);
 942         }
 943
 944         if (m_isHidden) {
 945             KIconEffect::semiTransparent(m_pixmap);
 946         }
 947
 948         if (isSelected()) {
 949             const QColor color = palette().brush(QPalette::Normal, QPalette::Highlight).color();
 950             QImage image = m_pixmap.toImage();
 951             KIconEffect::colorize(image, color, 0.8f);
 952             m_pixmap = QPixmap::fromImage(image);
 953         }
 954     }
 955
 956     if (!m_overlay.isNull()) {
 957         QPainter painter(&m_pixmap);
 958         painter.drawPixmap(0, m_pixmap.height() - m_overlay.height(), m_overlay);
 959     }
 960
 961     int scaledIconSize = 0;
 962     if (iconOnTop) {
 963         const TextInfo* textInfo = m_textInfo.value("text");
 964         scaledIconSize = static_cast<int>(textInfo->pos.y() - 2 * padding);
 965     } else {
 966         const int textRowsCount = (m_layout == CompactLayout) ? visibleRoles().count() : 1;
 967         const qreal requiredTextHeight = textRowsCount * m_customizedFontMetrics.height();
 968         scaledIconSize = (requiredTextHeight < maxIconHeight) ?
 969                            widgetSize.height() - 2 * padding : maxIconHeight;
 970     }
 971
 972     const int maxScaledIconWidth = iconOnTop ? widgetSize.width() - 2 * padding : scaledIconSize;
 973     const int maxScaledIconHeight = scaledIconSize;
 974
 975     m_scaledPixmapSize = m_pixmap.size();
 976     m_scaledPixmapSize.scale(maxScaledIconWidth, maxScaledIconHeight, Qt::KeepAspectRatio);
 977
 978     if (iconOnTop) {
 979         // Center horizontally and align on bottom within the icon-area
 980         m_pixmapPos.setX((widgetSize.width() - m_scaledPixmapSize.width()) / 2);
 981         m_pixmapPos.setY(padding + scaledIconSize - m_scaledPixmapSize.height());
 982     } else {
 983         // Center horizontally and vertically within the icon-area
 984         const TextInfo* textInfo = m_textInfo.value("text");
 985         m_pixmapPos.setX(textInfo->pos.x() - 2 * padding
 986                          - (scaledIconSize + m_scaledPixmapSize.width()) / 2);
 987         m_pixmapPos.setY(padding
 988                          + (scaledIconSize - m_scaledPixmapSize.height()) / 2);
 989     }
 990
 991     m_iconRect = QRectF(m_pixmapPos, QSizeF(m_scaledPixmapSize));
 992
 993     // Prepare the pixmap that is used when the item gets hovered
 994     if (isHovered()) {
 995         m_hoverPixmap = m_pixmap;
 996         KIconEffect* effect = KIconLoader::global()->iconEffect();
 997         // In the KIconLoader terminology, active = hover.
 998         if (effect->hasEffect(KIconLoader::Desktop, KIconLoader::ActiveState)) {
 999             m_hoverPixmap = effect->apply(m_pixmap, KIconLoader::Desktop, KIconLoader::ActiveState);
1000         } else {
1001             m_hoverPixmap = m_pixmap;
1002         }
1003     } else if (hoverOpacity() <= 0.0) {
1004         // No hover animation is ongoing. Clear m_hoverPixmap to save memory.
1005         m_hoverPixmap = QPixmap();
1006     }
1007 }
1008
1009 void KStandardItemListWidget::updateTextsCache()
1010 {
1011     QTextOption textOption;
1012     switch (m_layout) {
1013     case IconsLayout:
1014         textOption.setWrapMode(QTextOption::WrapAtWordBoundaryOrAnywhere);
1015         textOption.setAlignment(Qt::AlignHCenter);
1016         break;
1017     case CompactLayout:
1018     case DetailsLayout:
1019         textOption.setAlignment(Qt::AlignLeft);
1020         textOption.setWrapMode(QTextOption::NoWrap);
1021         break;
1022     default:
1023         Q_ASSERT(false);
1024         break;
1025     }
1026
1027     qDeleteAll(m_textInfo);
1028     m_textInfo.clear();
1029     for (int i = 0; i < m_sortedVisibleRoles.count(); ++i) {
1030         TextInfo* textInfo = new TextInfo();
1031         textInfo->staticText.setTextFormat(Qt::PlainText);
1032         textInfo->staticText.setPerformanceHint(QStaticText::AggressiveCaching);
1033         textInfo->staticText.setTextOption(textOption);
1034         m_textInfo.insert(m_sortedVisibleRoles[i], textInfo);
1035     }
1036
1037     switch (m_layout) {
1038     case IconsLayout:   updateIconsLayoutTextCache(); break;
1039     case CompactLayout: updateCompactLayoutTextCache(); break;
1040     case DetailsLayout: updateDetailsLayoutTextCache(); break;
1041     default: Q_ASSERT(false); break;
1042     }
1043
1044     const TextInfo* ratingTextInfo = m_textInfo.value("rating");
1045     if (ratingTextInfo) {
1046         // The text of the rating-role has been set to empty to get
1047         // replaced by a rating-image showing the rating as stars.
1048         const KItemListStyleOption& option = styleOption();
1049         QSizeF ratingSize = preferredRatingSize(option);
1050
1051         const qreal availableWidth = (m_layout == DetailsLayout)
1052                                      ? columnWidth("rating") - columnPadding(option)
1053                                      : size().width();
1054         if (ratingSize.width() > availableWidth) {
1055             ratingSize.rwidth() = availableWidth;
1056         }
1057         m_rating = QPixmap(ratingSize.toSize());
1058         m_rating.fill(Qt::transparent);
1059
1060         QPainter painter(&m_rating);
1061         const QRect rect(0, 0, m_rating.width(), m_rating.height());
1062         const int rating = data().value("rating").toInt();
1063         KRatingPainter::paintRating(&painter, rect, Qt::AlignJustify | Qt::AlignVCenter, rating);
1064     } else if (!m_rating.isNull()) {
1065         m_rating = QPixmap();
1066     }
1067 }
1068
1069 void KStandardItemListWidget::updateIconsLayoutTextCache()
1070 {
1071     //      +------+
1072     //      | Icon |
1073     //      +------+
1074     //
1075     //    Name role that
1076     // might get wrapped above
1077     //    several lines.
1078     //  Additional role 1
1079     //  Additional role 2
1080
1081     const QHash<QByteArray, QVariant> values = data();
1082
1083     const KItemListStyleOption& option = styleOption();
1084     const qreal padding = option.padding;
1085     const qreal maxWidth = size().width() - 2 * padding;
1086     const qreal widgetHeight = size().height();
1087     const qreal lineSpacing = m_customizedFontMetrics.lineSpacing();
1088
1089     // Initialize properties for the "text" role. It will be used as anchor
1090     // for initializing the position of the other roles.
1091     TextInfo* nameTextInfo = m_textInfo.value("text");
1092     const QString nameText = KStringHandler::preProcessWrap(values["text"].toString());
1093     nameTextInfo->staticText.setText(nameText);
1094
1095     // Calculate the number of lines required for the name and the required width
1096     qreal nameWidth = 0;
1097     qreal nameHeight = 0;
1098     QTextLine line;
1099
1100     QTextLayout layout(nameTextInfo->staticText.text(), m_customizedFont);
1101     layout.setTextOption(nameTextInfo->staticText.textOption());
1102     layout.beginLayout();
1103     int nameLineIndex = 0;
1104     while ((line = layout.createLine()).isValid()) {
1105         line.setLineWidth(maxWidth);
1106         nameWidth = qMax(nameWidth, line.naturalTextWidth());
1107         nameHeight += line.height();
1108
1109         ++nameLineIndex;
1110         if (nameLineIndex == option.maxTextLines) {
1111             // The maximum number of textlines has been reached. If this is
1112             // the case provide an elided text if necessary.
1113             const int textLength = line.textStart() + line.textLength();
1114             if (textLength < nameText.length()) {
1115                 // Elide the last line of the text
1116                 QString lastTextLine = nameText.mid(line.textStart());
1117                 lastTextLine = m_customizedFontMetrics.elidedText(lastTextLine,
1118                                                                   Qt::ElideRight,
1119                                                                   maxWidth);
1120                 const QString elidedText = nameText.left(line.textStart()) + lastTextLine;
1121                 nameTextInfo->staticText.setText(elidedText);
1122
1123                 const qreal lastLineWidth = m_customizedFontMetrics.boundingRect(lastTextLine).width();
1124                 nameWidth = qMax(nameWidth, lastLineWidth);
1125             }
1126             break;
1127         }
1128     }
1129     layout.endLayout();
1130
1131     // Use one line for each additional information
1132     const int additionalRolesCount = qMax(visibleRoles().count() - 1, 0);
1133     nameTextInfo->staticText.setTextWidth(maxWidth);
1134     nameTextInfo->pos = QPointF(padding, widgetHeight -
1135                                          nameHeight -
1136                                          additionalRolesCount * lineSpacing -
1137                                          padding);
1138     m_textRect = QRectF(padding + (maxWidth - nameWidth) / 2,
1139                         nameTextInfo->pos.y(),
1140                         nameWidth,
1141                         nameHeight);
1142
1143     // Calculate the position for each additional information
1144     qreal y = nameTextInfo->pos.y() + nameHeight;
1145     foreach (const QByteArray& role, m_sortedVisibleRoles) {
1146         if (role == "text") {
1147             continue;
1148         }
1149
1150         const QString text = roleText(role, values);
1151         TextInfo* textInfo = m_textInfo.value(role);
1152         textInfo->staticText.setText(text);
1153
1154         qreal requiredWidth = 0;
1155
1156         QTextLayout layout(text, m_customizedFont);
1157         QTextOption textOption;
1158         textOption.setWrapMode(QTextOption::NoWrap);
1159         layout.setTextOption(textOption);
1160
1161         layout.beginLayout();
1162         QTextLine textLine = layout.createLine();
1163         if (textLine.isValid()) {
1164             textLine.setLineWidth(maxWidth);
1165             requiredWidth = textLine.naturalTextWidth();
1166             if (requiredWidth > maxWidth) {
1167                 const QString elidedText = m_customizedFontMetrics.elidedText(text, Qt::ElideRight, maxWidth);
1168                 textInfo->staticText.setText(elidedText);
1169                 requiredWidth = m_customizedFontMetrics.width(elidedText);
1170             } else if (role == "rating") {
1171                 // Use the width of the rating pixmap, because the rating text is empty.
1172                 requiredWidth = m_rating.width();
1173             }
1174         }
1175         layout.endLayout();
1176
1177         textInfo->pos = QPointF(padding, y);
1178         textInfo->staticText.setTextWidth(maxWidth);
1179
1180         const QRectF textRect(padding + (maxWidth - requiredWidth) / 2, y, requiredWidth, lineSpacing);
1181         m_textRect |= textRect;
1182
1183         y += lineSpacing;
1184     }
1185
1186     // Add a padding to the text rectangle
1187     m_textRect.adjust(-padding, -padding, padding, padding);
1188 }
1189
1190 void KStandardItemListWidget::updateCompactLayoutTextCache()
1191 {
1192     // +------+  Name role
1193     // | Icon |  Additional role 1
1194     // +------+  Additional role 2
1195
1196     const QHash<QByteArray, QVariant> values = data();
1197
1198     const KItemListStyleOption& option = styleOption();
1199     const qreal widgetHeight = size().height();
1200     const qreal lineSpacing = m_customizedFontMetrics.lineSpacing();
1201     const qreal textLinesHeight = qMax(visibleRoles().count(), 1) * lineSpacing;
1202     const int scaledIconSize = (textLinesHeight < option.iconSize) ? widgetHeight - 2 * option.padding : option.iconSize;
1203
1204     qreal maximumRequiredTextWidth = 0;
1205     const qreal x = option.padding * 3 + scaledIconSize;
1206     qreal y = qRound((widgetHeight - textLinesHeight) / 2);
1207     const qreal maxWidth = size().width() - x - option.padding;
1208     foreach (const QByteArray& role, m_sortedVisibleRoles) {
1209         const QString text = roleText(role, values);
1210         TextInfo* textInfo = m_textInfo.value(role);
1211         textInfo->staticText.setText(text);
1212
1213         qreal requiredWidth = m_customizedFontMetrics.width(text);
1214         if (requiredWidth > maxWidth) {
1215             requiredWidth = maxWidth;
1216             const QString elidedText = m_customizedFontMetrics.elidedText(text, Qt::ElideRight, maxWidth);
1217             textInfo->staticText.setText(elidedText);
1218         }
1219
1220         textInfo->pos = QPointF(x, y);
1221         textInfo->staticText.setTextWidth(maxWidth);
1222
1223         maximumRequiredTextWidth = qMax(maximumRequiredTextWidth, requiredWidth);
1224
1225         y += lineSpacing;
1226     }
1227
1228     m_textRect = QRectF(x - 2 * option.padding, 0, maximumRequiredTextWidth + 3 * option.padding, widgetHeight);
1229 }
1230
1231 void KStandardItemListWidget::updateDetailsLayoutTextCache()
1232 {
1233     // Precondition: Requires already updated m_expansionArea
1234     // to determine the left position.
1235
1236     // +------+
1237     // | Icon |  Name role   Additional role 1   Additional role 2
1238     // +------+
1239     m_textRect = QRectF();
1240
1241     const KItemListStyleOption& option = styleOption();
1242     const QHash<QByteArray, QVariant> values = data();
1243
1244     const qreal widgetHeight = size().height();
1245     const int scaledIconSize = widgetHeight - 2 * option.padding;
1246     const int fontHeight = m_customizedFontMetrics.height();
1247
1248     const qreal columnWidthInc = columnPadding(option);
1249     qreal firstColumnInc = scaledIconSize;
1250     if (m_supportsItemExpanding) {
1251         firstColumnInc += (m_expansionArea.left() + m_expansionArea.right() + widgetHeight) / 2;
1252     } else {
1253         firstColumnInc += option.padding;
1254     }
1255
1256     qreal x = firstColumnInc;
1257     const qreal y = qMax(qreal(option.padding), (widgetHeight - fontHeight) / 2);
1258
1259     foreach (const QByteArray& role, m_sortedVisibleRoles) {
1260         QString text = roleText(role, values);
1261
1262         // Elide the text in case it does not fit into the available column-width
1263         qreal requiredWidth = m_customizedFontMetrics.width(text);
1264         const qreal roleWidth = columnWidth(role);
1265         qreal availableTextWidth = roleWidth - columnWidthInc;
1266
1267         const bool isTextRole = (role == "text");
1268         if (isTextRole) {
1269             availableTextWidth -= firstColumnInc;
1270         }
1271
1272         if (requiredWidth > availableTextWidth) {
1273             text = m_customizedFontMetrics.elidedText(text, Qt::ElideRight, availableTextWidth);
1274             requiredWidth = m_customizedFontMetrics.width(text);
1275         }
1276
1277         TextInfo* textInfo = m_textInfo.value(role);
1278         textInfo->staticText.setText(text);
1279         textInfo->pos = QPointF(x + columnWidthInc / 2, y);
1280         x += roleWidth;
1281
1282         if (isTextRole) {
1283             const qreal textWidth = option.extendedSelectionRegion
1284                                     ? size().width() - textInfo->pos.x()
1285                                     : requiredWidth + 2 * option.padding;
1286             m_textRect = QRectF(textInfo->pos.x() - 2 * option.padding, 0,
1287                                 textWidth + option.padding, size().height());
1288
1289             // The column after the name should always be aligned on the same x-position independent
1290             // from the expansion-level shown in the name column
1291             x -= firstColumnInc;
1292         } else if (isRoleRightAligned(role)) {
1293             textInfo->pos.rx() += roleWidth - requiredWidth - columnWidthInc;
1294         }
1295     }
1296 }
1297
1298 void KStandardItemListWidget::updateAdditionalInfoTextColor()
1299 {
1300     QColor c1;
1301     if (m_customTextColor.isValid()) {
1302         c1 = m_customTextColor;
1303     } else if (isSelected() && m_layout != DetailsLayout) {
1304         c1 = styleOption().palette.highlightedText().color();
1305     } else {
1306         c1 = styleOption().palette.text().color();
1307     }
1308
1309     // For the color of the additional info the inactive text color
1310     // is not used as this might lead to unreadable text for some color schemes. Instead
1311     // the text color c1 is slightly mixed with the background color.
1312     const QColor c2 = styleOption().palette.base().color();
1313     const int p1 = 70;
1314     const int p2 = 100 - p1;
1315     m_additionalInfoTextColor = QColor((c1.red()   * p1 + c2.red()   * p2) / 100,
1316                                        (c1.green() * p1 + c2.green() * p2) / 100,
1317                                        (c1.blue()  * p1 + c2.blue()  * p2) / 100);
1318 }
1319
1320 void KStandardItemListWidget::drawPixmap(QPainter* painter, const QPixmap& pixmap)
1321 {
1322     if (m_scaledPixmapSize != pixmap.size()) {
1323         QPixmap scaledPixmap = pixmap;
1324         KPixmapModifier::scale(scaledPixmap, m_scaledPixmapSize);
1325         painter->drawPixmap(m_pixmapPos, scaledPixmap);
1326
1327 #ifdef KSTANDARDITEMLISTWIDGET_DEBUG
1328         painter->setPen(Qt::blue);
1329         painter->drawRect(QRectF(m_pixmapPos, QSizeF(m_scaledPixmapSize)));
1330 #endif
1331     } else {
1332         painter->drawPixmap(m_pixmapPos, pixmap);
1333     }
1334 }
1335
1336 void KStandardItemListWidget::drawSiblingsInformation(QPainter* painter)
1337 {
1338     const int siblingSize = size().height();
1339     const int x = (m_expansionArea.left() + m_expansionArea.right() - siblingSize) / 2;
1340     QRect siblingRect(x, 0, siblingSize, siblingSize);
1341
1342     QStyleOption option;
1343     option.palette.setColor(QPalette::Text, option.palette.color(normalTextColorRole()));
1344     bool isItemSibling = true;
1345
1346     const QBitArray siblings = siblingsInformation();
1347     for (int i = siblings.count() - 1; i >= 0; --i) {
1348         option.rect = siblingRect;
1349         option.state = siblings.at(i) ? QStyle::State_Sibling : QStyle::State_None;
1350
1351         if (isItemSibling) {
1352             option.state |= QStyle::State_Item;
1353             if (m_isExpandable) {
1354                 option.state |= QStyle::State_Children;
1355             }
1356             if (data()["isExpanded"].toBool()) {
1357                 option.state |= QStyle::State_Open;
1358             }
1359             isItemSibling = false;
1360         }
1361
1362         style()->drawPrimitive(QStyle::PE_IndicatorBranch, &option, painter);
1363
1364         siblingRect.translate(-siblingRect.width(), 0);
1365     }
1366 }
1367
1368 QRectF KStandardItemListWidget::roleEditingRect(const QByteArray& role) const
1369 {
1370     const TextInfo* textInfo = m_textInfo.value(role);
1371     if (!textInfo) {
1372         return QRectF();
1373     }
1374
1375     QRectF rect(textInfo->pos, textInfo->staticText.size());
1376     if (m_layout == DetailsLayout) {
1377         rect.setWidth(columnWidth(role) - rect.x());
1378     }
1379
1380     return rect;
1381 }
1382
1383 void KStandardItemListWidget::closeRoleEditor()
1384 {
1385     disconnect(m_roleEditor, SIGNAL(roleEditingCanceled(QByteArray,QVariant)),
1386                this, SLOT(slotRoleEditingCanceled(QByteArray,QVariant)));
1387     disconnect(m_roleEditor, SIGNAL(roleEditingFinished(QByteArray,QVariant)),
1388                this, SLOT(slotRoleEditingFinished(QByteArray,QVariant)));
1389
1390     if (m_roleEditor->hasFocus()) {
1391         // If the editing was not ended by a FocusOut event, we have
1392         // to transfer the keyboard focus back to the KItemListContainer.
1393         scene()->views()[0]->parentWidget()->setFocus();
1394     }
1395
1396     if (m_oldRoleEditor) {
1397         m_oldRoleEditor->deleteLater();
1398     }
1399     m_oldRoleEditor = m_roleEditor;
1400     m_roleEditor->hide();
1401     m_roleEditor = 0;
1402 }
1403
1404 QPixmap KStandardItemListWidget::pixmapForIcon(const QString& name, const QStringList& overlays, int size)
1405 {
1406     const QString key = "KStandardItemListWidget:" % name % ":" % overlays.join(":") % ":" % QString::number(size);
1407     QPixmap pixmap;
1408
1409     if (!QPixmapCache::find(key, pixmap)) {
1410         const KIcon icon(name);
1411
1412         int requestedSize;
1413         if (size <= KIconLoader::SizeSmall) {
1414             requestedSize = KIconLoader::SizeSmall;
1415         } else if (size <= KIconLoader::SizeSmallMedium) {
1416             requestedSize = KIconLoader::SizeSmallMedium;
1417         } else if (size <= KIconLoader::SizeMedium) {
1418             requestedSize = KIconLoader::SizeMedium;
1419         } else if (size <= KIconLoader::SizeLarge) {
1420             requestedSize = KIconLoader::SizeLarge;
1421         } else if (size <= KIconLoader::SizeHuge) {
1422             requestedSize = KIconLoader::SizeHuge;
1423         } else if (size <= KIconLoader::SizeEnormous) {
1424             requestedSize = KIconLoader::SizeEnormous;
1425         } else if (size <= KIconLoader::SizeEnormous * 2) {
1426             requestedSize = KIconLoader::SizeEnormous * 2;
1427         } else {
1428             requestedSize = size;
1429         }
1430
1431         pixmap = icon.pixmap(requestedSize, requestedSize);
1432         if (requestedSize != size) {
1433             KPixmapModifier::scale(pixmap, QSize(size, size));
1434         }
1435
1436         // Strangely KFileItem::overlays() returns empty string-values, so
1437         // we need to check first whether an overlay must be drawn at all.
1438         // It is more efficient to do it here, as KIconLoader::drawOverlays()
1439         // assumes that an overlay will be drawn and has some additional
1440         // setup time.
1441         foreach (const QString& overlay, overlays) {
1442             if (!overlay.isEmpty()) {
1443                 // There is at least one overlay, draw all overlays above m_pixmap
1444                 // and cancel the check
1445                 KIconLoader::global()->drawOverlays(overlays, pixmap, KIconLoader::Desktop);
1446                 break;
1447             }
1448         }
1449
1450         QPixmapCache::insert(key, pixmap);
1451     }
1452
1453     return pixmap;
1454 }
1455
1456 QSizeF KStandardItemListWidget::preferredRatingSize(const KItemListStyleOption& option)
1457 {
1458     const qreal height = option.fontMetrics.ascent();
1459     return QSizeF(height * 5, height);
1460 }
1461
1462 qreal KStandardItemListWidget::columnPadding(const KItemListStyleOption& option)
1463 {
1464     return option.padding * 6;
1465 }
1466
1467 #include "kstandarditemlistwidget.moc"