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/***************************************************************************
* Copyright (C) 2011 by Peter Penz <[email protected]> *
* *
* Based on the Itemviews NG project from Trolltech Labs: *
* http://qt.gitorious.org/qt-labs/itemviews-ng *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program; if not, write to the *
* Free Software Foundation, Inc., *
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA *
***************************************************************************/
#include "kstandarditemlistgroupheader.h"
#include <KRatingPainter>
#include <QPainter>
KStandardItemListGroupHeader::KStandardItemListGroupHeader(QGraphicsWidget* parent) :
KItemListGroupHeader(parent),
m_dirtyCache(true),
m_text(),
m_pixmap()
{
m_text.setTextFormat(Qt::PlainText);
m_text.setPerformanceHint(QStaticText::AggressiveCaching);
}
KStandardItemListGroupHeader::~KStandardItemListGroupHeader()
{
}
void KStandardItemListGroupHeader::paint(QPainter* painter, const QStyleOptionGraphicsItem* option, QWidget* widget)
{
if (m_dirtyCache) {
updateCache();
}
KItemListGroupHeader::paint(painter, option, widget);
}
void KStandardItemListGroupHeader::paintRole(QPainter* painter, const QRectF& roleBounds, const QColor& color)
{
if (m_pixmap.isNull()) {
painter->setPen(color);
painter->drawStaticText(roleBounds.topLeft(), m_text);
} else {
painter->drawPixmap(roleBounds.topLeft(), m_pixmap);
}
}
void KStandardItemListGroupHeader::paintSeparator(QPainter* painter, const QColor& color)
{
if (itemIndex() == 0) {
// No top- or left-line should be drawn for the first group-header
return;
}
painter->setPen(color);
if (scrollOrientation() == Qt::Horizontal) {
painter->drawLine(0, 0, 0, size().height() - 1);
} else {
painter->drawLine(0, 0, size().width() - 1, 0);
}
}
void KStandardItemListGroupHeader::roleChanged(const QByteArray ¤t, const QByteArray &previous)
{
Q_UNUSED(current)
Q_UNUSED(previous)
m_dirtyCache = true;
}
void KStandardItemListGroupHeader::dataChanged(const QVariant& current, const QVariant& previous)
{
Q_UNUSED(current)
Q_UNUSED(previous)
m_dirtyCache = true;
}
void KStandardItemListGroupHeader::resizeEvent(QGraphicsSceneResizeEvent* event)
{
QGraphicsWidget::resizeEvent(event);
m_dirtyCache = true;
}
void KStandardItemListGroupHeader::updateCache()
{
Q_ASSERT(m_dirtyCache);
m_dirtyCache = false;
const qreal maxWidth = size().width() - 4 * styleOption().padding;
if (role() == "rating") {
m_text.setText(QString());
const qreal height = styleOption().fontMetrics.ascent();
const QSizeF pixmapSize(qMin(height * 5, maxWidth), height);
m_pixmap = QPixmap(pixmapSize.toSize());
m_pixmap.fill(Qt::transparent);
QPainter painter(&m_pixmap);
const QRect rect(0, 0, m_pixmap.width(), m_pixmap.height());
const int rating = data().toInt();
KRatingPainter::paintRating(&painter, rect, Qt::AlignJustify | Qt::AlignVCenter, rating);
} else {
m_pixmap = QPixmap();
QFontMetricsF fontMetrics(font());
const QString text = fontMetrics.elidedText(data().toString(), Qt::ElideRight, maxWidth);
m_text.setText(text);
}
}
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