Method paintEvent

ElaWidgetTools/ElaPromotionCard.cpp:178–259

}

void ElaPromotionCard::paintEvent(QPaintEvent* event)
{
    Q_D(ElaPromotionCard);
    QPainter painter(this);
    painter.save();
    painter.setRenderHints(QPainter::Antialiasing | QPainter::TextAntialiasing | QPainter::SmoothPixmapTransform);
    painter.setPen(Qt::NoPen);
    //阴影绘制
    eTheme->drawEffectShadow(&painter, rect(), d->_shadowBorderWidth, d->_pBorderRadius);
    QRect foregroundRect(d->_shadowBorderWidth, d->_shadowBorderWidth, width() - 2 * d->_shadowBorderWidth, height() - 2 * d->_shadowBorderWidth);
    QPainterPath path;
    path.addRoundedRect(foregroundRect, d->_pBorderRadius, d->_pBorderRadius);
    painter.setClipPath(path);
    //背景图片绘制
    if (!d->_pCardPixmap.isNull())
    {
        //源区域计算
        QRect pixSourceRect = d->_pCardPixmap.rect();
        qreal horizontalOffset = d->_pCardPixmap.width() * (1 - d->_pHorizontalCardPixmapRatio) / 2;
        qreal verticalOffset = d->_pCardPixmap.height() * (1 - d->_pVerticalCardPixmapRatio) / 2;
        pixSourceRect.adjust(horizontalOffset, verticalOffset, -horizontalOffset, -verticalOffset);
        painter.drawPixmap(foregroundRect, d->_pCardPixmap, pixSourceRect);
    }
    //文字绘制
    painter.save();
    QFont font = painter.font();
    //卡片标题
    font.setWeight(QFont::Bold);
    font.setPixelSize(d->_pCardTitlePixelSize);
    painter.setFont(font);
    painter.setPen(d->_pCardTitleColor);
    painter.drawText(QRect(25, 25, foregroundRect.width() - 25, foregroundRect.height()), Qt::AlignLeft | Qt::AlignTop | Qt::TextSingleLine, d->_pCardTitle);
    //标题
    font.setWeight(QFont::Bold);
    font.setPixelSize(d->_pTitlePixelSize);
    painter.setFont(font);
    painter.setPen(d->_pTitleColor);
    int titleTextHeight = painter.fontMetrics().height();
    QRect titleRect(25, (height() - titleTextHeight) / 2, foregroundRect.width() - 25, titleTextHeight);
    painter.drawText(titleRect, Qt::AlignLeft | Qt::AlignBottom | Qt::TextSingleLine, d->_pTitle);
    //推广标题
    if (!d->_pPromotionTitle.isEmpty())
    {
        font.setWeight(QFont::Normal);
        font.setPixelSize(d->_pPromotionTitlePixelSize);
        painter.setFont(font);
        int promotionTitleTextWidth = painter.fontMetrics().horizontalAdvance(d->_pPromotionTitle);
        int promotionTitleTextHeight = painter.fontMetrics().height();
        QRect promotionTitleTextRect(32, titleRect.top() - promotionTitleTextHeight - 5, foregroundRect.width() / 2 - 25, promotionTitleTextHeight);
        //背景绘制
        painter.setPen(Qt::NoPen);
        painter.setBrush(d->_pPromotionTitleBaseColor);
        painter.drawRoundedRect(QRect(25, promotionTitleTextRect.top() - 2, promotionTitleTextWidth + 14, promotionTitleTextHeight + 4), 8, 8);
        //文字绘制
        painter.setPen(d->_pPromotionTitleColor);
        painter.drawText(promotionTitleTextRect, Qt::AlignLeft | Qt::AlignBottom | Qt::TextSingleLine, d->_pPromotionTitle);
    }
    //副标题