tasks/htmldelegate.cpp

/*
    mephi-tasks — a client to NRNU MEPhI Redmine server

    Copyright (C) 2015  Dmitry Yu Okunev <dyokunev@ut.mephi.ru> 0x8E30679C
 */


#include "htmldelegate.h"

#include <QPainter>
#include <QTextDocument>
#include <QAbstractTextDocumentLayout>

HTMLDelegate::HTMLDelegate()
{
}

/*
 * The next code is an adapted copy of code from:
 *     http://stackoverflow.com/questions/1956542/how-to-make-item-view-render-rich-html-text-in-qt
 *
 * Authors (in order of contribution decrease):
 *     * serge-gubenko,
 *     * satanas,
 *     * Dmitry Yu Okunev <dyokunev@ut.mephi.ru>.
 *
 * The code is licensed by "CC BY-SA 3.0 with attribution required" according
 * to "stackoverflow.com"'s footer.
 *
 */

void HTMLDelegate::paint ( QPainter* painter, const QStyleOptionViewItem & option, const QModelIndex &index ) const
{
	QStyleOptionViewItemV4 options = option;
	initStyleOption ( &options, index );
	painter->save();
	QTextDocument doc;
	doc.setHtml ( options.text );
	options.text = "";
	options.widget->style()->drawControl ( QStyle::CE_ItemViewItem, &options, painter );
	// shift text right to make icon visible
	QSize iconSize = options.icon.actualSize ( options.rect.size() );
	painter->translate ( options.rect.left() + iconSize.width(), options.rect.top() );
	QRect clip ( 0, 0, options.rect.width() + iconSize.width(), options.rect.height() );
	//doc.drawContents(painter, clip);
	painter->setClipRect ( clip );
	QAbstractTextDocumentLayout::PaintContext ctx;
	// set text color to red for selected item
	//if (option.state & QStyle::State_Selected)
	//    ctx.palette.setColor(QPalette::Text, QColor("red"));
	ctx.clip = clip;
	doc.documentLayout()->draw ( painter, ctx );
	painter->restore();
}

QSize HTMLDelegate::sizeHint ( const QStyleOptionViewItem & option, const QModelIndex & index ) const
{
	QStyleOptionViewItemV4 options = option;
	initStyleOption ( &options, index );
	QTextDocument doc;
	doc.setHtml ( options.text );
	doc.setTextWidth ( options.rect.width() );
	return QSize ( doc.idealWidth(), doc.size().height() );
}