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// ************************************************************************************************
//
// BornAgain: simulate and fit reflection and scattering
//
//! @file GUI/View/Base/Fontsize.cpp
//! @brief Implements functions in namespace GUI::Font, concerned with font size.
//!
//! @homepage http://www.bornagainproject.org
//! @license GNU General Public License v3 or higher (see COPYING)
//! @copyright Forschungszentrum Jülich GmbH 2018
//! @authors Scientific Computing Group at MLZ (see CITATION, AUTHORS)
//
// ************************************************************************************************
#include "GUI/View/Base/Fontsize.h"
#include "Base/Util/Assert.h"
#include <QApplication>
namespace {
//! Calculates size of letter `M` for current system font settings.
QSize FindSizeOfLetterM(const QWidget* widget)
{
QFontMetrics fontMetric(widget->font());
auto em = fontMetric.horizontalAdvance('M');
auto fontAscent = fontMetric.ascent();
return {em, fontAscent};
}
QSize DefaultSizeOfLetterM()
{
QWidget widget;
return FindSizeOfLetterM(&widget);
}
} // namespace
QSize GUI::Font::SizeOfLetterM(const QWidget* widget)
{
static QSize default_size = DefaultSizeOfLetterM();
return widget ? FindSizeOfLetterM(widget) : default_size;
}
int GUI::Font::fontSizeRegular()
{
return QApplication::font().pointSize();
}
int GUI::Font::fontSizeLarge()
{
return fontSizeRegular() * 1.2;
}
int GUI::Font::fontSizeSmall()
{
return fontSizeRegular() * 0.9;
}
int GUI::Font::fontSizeSmaller()
{
return fontSizeRegular() * 0.7;
}
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