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