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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
#include "starrating.h"
#include <QtWidgets>
#include <cmath>
constexpr int PaintingScaleFactor = 20;
//! [0]
StarRating::StarRating(int starCount, int maxStarCount)
: myStarCount(starCount),
myMaxStarCount(maxStarCount)
{
starPolygon << QPointF(1.0, 0.5);
for (int i = 1; i < 5; ++i)
starPolygon << QPointF(0.5 + 0.5 * std::cos(0.8 * i * 3.14),
0.5 + 0.5 * std::sin(0.8 * i * 3.14));
diamondPolygon << QPointF(0.4, 0.5) << QPointF(0.5, 0.4)
<< QPointF(0.6, 0.5) << QPointF(0.5, 0.6)
<< QPointF(0.4, 0.5);
}
//! [0]
//! [1]
QSize StarRating::sizeHint() const
{
return PaintingScaleFactor * QSize(myMaxStarCount, 1);
}
//! [1]
//! [2]
void StarRating::paint(QPainter *painter, const QRect &rect,
const QPalette &palette, EditMode mode) const
{
painter->save();
painter->setRenderHint(QPainter::Antialiasing, true);
painter->setPen(Qt::NoPen);
painter->setBrush(mode == EditMode::Editable ?
palette.highlight() :
palette.windowText());
const int yOffset = (rect.height() - PaintingScaleFactor) / 2;
painter->translate(rect.x(), rect.y() + yOffset);
painter->scale(PaintingScaleFactor, PaintingScaleFactor);
for (int i = 0; i < myMaxStarCount; ++i) {
if (i < myStarCount)
painter->drawPolygon(starPolygon, Qt::WindingFill);
else if (mode == EditMode::Editable)
painter->drawPolygon(diamondPolygon, Qt::WindingFill);
painter->translate(1.0, 0.0);
}
painter->restore();
}
//! [2]
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