mapper/htmldelegate.cpp at master · allenck/mapper · GitHub

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#include "htmldelegate.h"
#include <QTextDocument>
#include <QApplication>
#include <QPainter>
#include <QAbstractTextDocumentLayout>

void HtmlDelegate::paint(QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index) const
{
    QStyleOptionViewItem optionV4 = option;
    initStyleOption(&optionV4, index);

    QStyle *style = optionV4.widget? optionV4.widget->style() : QApplication::style();

    QTextDocument doc;
    doc.setHtml(optionV4.text);

    QAbstractTextDocumentLayout::PaintContext ctx;

    QRect textRect = style->subElementRect(QStyle::SE_ItemViewItemText, &optionV4);
    painter->save();
    painter->translate(textRect.topLeft());
    painter->setClipRect(textRect.translated(-textRect.topLeft()));

    doc.documentLayout()->draw(painter, ctx);
    painter->restore();
}

QSize HtmlDelegate::sizeHint(const QStyleOptionViewItem &option, const QModelIndex &index) const
{
    QStyleOptionViewItem optionV4 = option;
    initStyleOption(&optionV4, index);

    QTextDocument doc;
    doc.setHtml(optionV4.text);
    doc.setTextWidth(optionV4.rect.width());
    return QSize(doc.idealWidth(), doc.size().height());
}