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//=============================================================================
// MuseScore
// Music Composition & Notation
//
// Copyright (C) 2020 MuseScore BVBA and others
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License version 2.
//
// 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., 675 Mass Ave, Cambridge, MA 02139, USA.
//=============================================================================
#include "radiobuttongroupbox.h"
namespace Ms {
void RadioButtonGroupBox::paintEvent(QPaintEvent*)
{
QStylePainter painter(this);
QStyleOptionGroupBox styleOption;
initStyleOption(&styleOption);
// Paint the default QGroupBox-style control, which includes an unwanted checkbox that we'll cover up afterwards.
painter.drawComplexControl(QStyle::CC_GroupBox, styleOption);
// Calculate the background color the same way Qt does in QFusionStylePrivate::tabFrameColor().
const QColor& buttonColor = styleOption.palette.button().color();
QColor bgColor = buttonColor.lighter(100 + std::max(1, (180 - qGray(buttonColor.rgb())) / 6));
bgColor.setHsv(bgColor.hue(), 3 * bgColor.saturation() / 4, bgColor.value());
bgColor = bgColor.lighter(104);
// Adjust the style options to use the checkbox's rectangle.
styleOption.rect = style()->subControlRect(QStyle::CC_GroupBox, &styleOption, QStyle::SC_GroupBoxCheckBox, this);
// Cover up the checkbox, making sure to enlarge the rectangle a bit to cover up any anti-aliasing around the edges.
painter.fillRect(styleOption.rect.adjusted(-2, -2, 2, 2), bgColor);
// Paint the radio button.
painter.drawPrimitive(QStyle::PE_IndicatorRadioButton, styleOption);
}
}
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