FontScalingEvent.cpp

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//  ************************************************************************************************
//
//  BornAgain: simulate and fit reflection and scattering
//
//! @file      GUI/View/PlotUtil/FontScalingEvent.cpp
//! @brief     Implements class FontScalingEvent
//!
//! @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/PlotUtil/FontScalingEvent.h"
#include "Base/Util/Assert.h"
#include "GUI/View/PlotUtil/ColorMap.h"
#include <QResizeEvent>
#include <qcustomplot.h>
 
namespace {
 
const QString tick_font = "tick-font-key";
const int widget_size_to_switch_font = 500;
 
} // namespace
 
FontScalingEvent::FontScalingEvent(ScientificPlot* plot, QWidget* parent)
    : QObject(parent)
    , m_plot(plot)
{
}
 
bool FontScalingEvent::eventFilter(QObject* obj, QEvent* event)
{
    if (event->type() == QEvent::Resize) {
        auto* resizeEvent = dynamic_cast<QResizeEvent*>(event);
        ASSERT(resizeEvent);
 
        if (!m_fonts.contains(tick_font))
            backupFonts();
        else {
            if (resizeEvent->size().width() < widget_size_to_switch_font)
                scaleFonts(0.8);
            else
                restoreFonts();
        }
    }
 
    return QObject::eventFilter(obj, event);
}
 
//! Backup all fonts.
 
void FontScalingEvent::backupFonts()
{
    m_fonts[tick_font] = m_plot->customPlot()->xAxis->tickLabelFont();
}
 
void FontScalingEvent::restoreFonts()
{
    QFont ff = m_fonts[tick_font];
    setTickLabelFont(ff);
}
 
void FontScalingEvent::scaleFonts(double factor)
{
    QFont ff = m_fonts[tick_font];
    ff.setPointSizeF(ff.pointSizeF() * factor);
    setTickLabelFont(ff);
}
 
void FontScalingEvent::setTickLabelFont(const QFont& font)
{
    m_plot->customPlot()->xAxis->setTickLabelFont(font);
    m_plot->customPlot()->yAxis->setTickLabelFont(font);
    if (m_plot->plotType() != ScientificPlot::PLOT_TYPE::Plot2D)
        return;
 
    auto* color_map = dynamic_cast<ColorMap*>(m_plot);
    color_map->colorScale()->axis()->setTickLabelFont(font);
}