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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
#undef QT_NO_FOREACH // this file contains unported legacy Q_FOREACH uses
#include <private/qabstractseries_p.h>
#include <private/qabstractaxis_p.h>
//themes
#include <private/chartthemesystem_p.h>
#include <private/chartthemelight_p.h>
#include <private/chartthemebluecerulean_p.h>
#include <private/chartthemedark_p.h>
#include <private/chartthemebrownsand_p.h>
#include <private/chartthemebluencs_p.h>
#include <private/chartthemehighcontrast_p.h>
#include <private/chartthemeblueicy_p.h>
#include <private/chartthemeqt_p.h>
QT_BEGIN_NAMESPACE
ChartThemeManager::ChartThemeManager(QChart* chart) :
m_chart(chart)
{
}
void ChartThemeManager::setTheme(QChart::ChartTheme theme)
{
if (m_theme.isNull() || theme != m_theme->id()) {
switch (theme) {
case QChart::ChartThemeLight:
m_theme.reset(new ChartThemeLight());
break;
case QChart::ChartThemeBlueCerulean:
m_theme.reset(new ChartThemeBlueCerulean());
break;
case QChart::ChartThemeDark:
m_theme.reset(new ChartThemeDark());
break;
case QChart::ChartThemeBrownSand:
m_theme.reset(new ChartThemeBrownSand());
break;
case QChart::ChartThemeBlueNcs:
m_theme.reset(new ChartThemeBlueNcs());
break;
case QChart::ChartThemeHighContrast:
m_theme.reset(new ChartThemeHighContrast());
break;
case QChart::ChartThemeBlueIcy:
m_theme.reset(new ChartThemeBlueIcy());
break;
case QChart::ChartThemeQt:
m_theme.reset(new ChartThemeQt());
break;
default:
m_theme.reset(new ChartThemeSystem());
break;
}
if (!m_theme.isNull()) {
decorateChart(m_chart,m_theme.data());
decorateLegend(m_chart->legend(),m_theme.data());
for (auto axis : std::as_const(m_axisList))
axis->d_ptr->initializeTheme(m_theme.data(), true);
for (const auto &[series, index] : std::as_const(m_seriesMap).asKeyValueRange())
series->d_ptr->initializeTheme(index, m_theme.data(), true);
}
}
}
// decorateChart is only called when theme is forcibly initialized
void ChartThemeManager::decorateChart(QChart *chart, ChartTheme *theme) const
{
chart->setBackgroundBrush(theme->chartBackgroundGradient());
QPen pen(Qt::transparent);
QBrush brush;
chart->setPlotAreaBackgroundBrush(brush);
chart->setPlotAreaBackgroundPen(pen);
chart->setPlotAreaBackgroundVisible(false);
chart->setTitleFont(theme->masterFont());
chart->setTitleBrush(theme->labelBrush());
chart->setDropShadowEnabled(theme->isBackgroundDropShadowEnabled());
}
// decorateLegend is only called when theme is forcibly initialized
void ChartThemeManager::decorateLegend(QLegend *legend, ChartTheme *theme) const
{
legend->setPen(theme->axisLinePen());
legend->setBrush(theme->chartBackgroundGradient());
legend->setFont(theme->labelFont());
legend->setLabelBrush(theme->labelBrush());
}
int ChartThemeManager::createIndexKey(const QList<int> &keys) const
{
auto keysCopy = keys;
std::sort(keysCopy.begin(), keysCopy.end());
int i = 0;
for (const auto key : std::as_const(keysCopy)) {
if (i != key)
break;
++i;
}
return i;
}
int ChartThemeManager::seriesCount(QAbstractSeries::SeriesType type) const
{
int count = 0;
QList<QAbstractSeries *> series = m_seriesMap.keys();
for (auto s : std::as_const(series)) {
if (s->type() == type)
count++;
}
return count;
}
void ChartThemeManager::handleSeriesAdded(QAbstractSeries *series)
{
int key = createIndexKey(m_seriesMap.values());
m_seriesMap.insert(series,key);
series->d_ptr->initializeTheme(key,m_theme.data(),false);
}
void ChartThemeManager::handleSeriesRemoved(QAbstractSeries *series)
{
m_seriesMap.remove(series);
}
void ChartThemeManager::handleAxisAdded(QAbstractAxis *axis)
{
m_axisList.append(axis);
axis->d_ptr->initializeTheme(m_theme.data(),false);
}
void ChartThemeManager::handleAxisRemoved(QAbstractAxis *axis)
{
m_axisList.removeAll(axis);
}
void ChartThemeManager::updateSeries(QAbstractSeries *series)
{
if(m_seriesMap.contains(series)){
series->d_ptr->initializeTheme(m_seriesMap[series],m_theme.data(),false);
}
}
QList<QGradient> ChartThemeManager::generateSeriesGradients(const QList<QColor>& colors)
{
QList<QGradient> result;
// Generate gradients in HSV color space
for (const auto &color : colors) {
QLinearGradient g;
qreal h = color.hsvHueF();
qreal s = color.hsvSaturationF();
QColor start = color;
start.setHsvF(h, 0.0, 1.0);
g.setColorAt(0.0, start);
g.setColorAt(0.5, color);
QColor end = color;
end.setHsvF(h, s, 0.25);
g.setColorAt(1.0, end);
result << g;
}
return result;
}
QColor ChartThemeManager::colorAt(const QColor &start, const QColor &end, qreal pos)
{
Q_ASSERT(pos >= 0.0 && pos <= 1.0);
qreal r = start.redF() + ((end.redF() - start.redF()) * pos);
qreal g = start.greenF() + ((end.greenF() - start.greenF()) * pos);
qreal b = start.blueF() + ((end.blueF() - start.blueF()) * pos);
QColor c;
c.setRgbF(r, g, b);
return c;
}
QColor ChartThemeManager::colorAt(const QGradient &gradient, qreal pos)
{
Q_ASSERT(pos >= 0 && pos <= 1.0);
QGradientStops stops = gradient.stops();
int count = stops.size();
// find previous stop relative to position
QGradientStop prev = stops.first();
for (int i = 0; i < count; i++) {
QGradientStop stop = stops.at(i);
if (pos > stop.first)
prev = stop;
// given position is actually a stop position?
if (pos == stop.first) {
//qDebug() << "stop color" << pos;
return stop.second;
}
}
// find next stop relative to position
QGradientStop next = stops.last();
for (int i = count - 1; i >= 0; i--) {
QGradientStop stop = stops.at(i);
if (pos < stop.first)
next = stop;
}
//qDebug() << "prev" << prev.first << "pos" << pos << "next" << next.first;
qreal range = next.first - prev.first;
qreal posDelta = pos - prev.first;
qreal relativePos = posDelta / range;
//qDebug() << "range" << range << "posDelta" << posDelta << "relativePos" << relativePos;
return colorAt(prev.second, next.second, relativePos);
}
QT_END_NAMESPACE
#include "moc_chartthememanager_p.cpp"