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/****************************************************************************
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**
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** Copyright (C) 2016 The Qt Company Ltd.
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** Contact: https://www.qt.io/licensing/
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**
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** This file is part of the Qt Charts module of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:GPL$
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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and The Qt Company. For licensing terms
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** and conditions see https://www.qt.io/terms-conditions. For further
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** information use the contact form at https://www.qt.io/contact-us.
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**
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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU
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** General Public License version 3 or (at your option) any later version
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** approved by the KDE Free Qt Foundation. The licenses are as published by
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** the Free Software Foundation and appearing in the file LICENSE.GPL3
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** included in the packaging of this file. Please review the following
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** information to ensure the GNU General Public License requirements will
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** be met: https://www.gnu.org/licenses/gpl-3.0.html.
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include <private/qabstractseries_p.h>
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#include <private/qabstractaxis_p.h>
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#include <QtCore/QTime>
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//themes
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#include <private/chartthemesystem_p.h>
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#include <private/chartthemelight_p.h>
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#include <private/chartthemebluecerulean_p.h>
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#include <private/chartthemedark_p.h>
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#include <private/chartthemebrownsand_p.h>
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#include <private/chartthemebluencs_p.h>
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#include <private/chartthemehighcontrast_p.h>
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#include <private/chartthemeblueicy_p.h>
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#include <private/chartthemeqt_p.h>
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QT_CHARTS_BEGIN_NAMESPACE
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ChartThemeManager::ChartThemeManager(QChart* chart) :
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m_chart(chart)
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{
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qsrand(QTime(0, 0, 0).secsTo(QTime::currentTime()));
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}
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void ChartThemeManager::setTheme(QChart::ChartTheme theme)
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{
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if (m_theme.isNull() || theme != m_theme->id()) {
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switch (theme) {
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case QChart::ChartThemeLight:
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m_theme.reset(new ChartThemeLight());
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break;
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case QChart::ChartThemeBlueCerulean:
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m_theme.reset(new ChartThemeBlueCerulean());
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break;
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case QChart::ChartThemeDark:
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m_theme.reset(new ChartThemeDark());
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break;
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case QChart::ChartThemeBrownSand:
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m_theme.reset(new ChartThemeBrownSand());
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break;
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case QChart::ChartThemeBlueNcs:
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m_theme.reset(new ChartThemeBlueNcs());
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break;
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case QChart::ChartThemeHighContrast:
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m_theme.reset(new ChartThemeHighContrast());
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break;
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case QChart::ChartThemeBlueIcy:
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m_theme.reset(new ChartThemeBlueIcy());
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break;
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case QChart::ChartThemeQt:
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m_theme.reset(new ChartThemeQt());
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break;
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default:
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m_theme.reset(new ChartThemeSystem());
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break;
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}
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if (!m_theme.isNull()) {
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decorateChart(m_chart,m_theme.data());
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decorateLegend(m_chart->legend(),m_theme.data());
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foreach (QAbstractAxis* axis, m_axisList)
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axis->d_ptr->initializeTheme(m_theme.data(), true);
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foreach (QAbstractSeries* series, m_seriesMap.keys())
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series->d_ptr->initializeTheme(m_seriesMap[series], m_theme.data(), true);
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}
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}
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}
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// decorateChart is only called when theme is forcibly initialized
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void ChartThemeManager::decorateChart(QChart *chart, ChartTheme *theme) const
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{
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chart->setBackgroundBrush(theme->chartBackgroundGradient());
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QPen pen(Qt::transparent);
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QBrush brush;
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chart->setPlotAreaBackgroundBrush(brush);
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chart->setPlotAreaBackgroundPen(pen);
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chart->setPlotAreaBackgroundVisible(false);
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chart->setTitleFont(theme->masterFont());
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chart->setTitleBrush(theme->labelBrush());
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chart->setDropShadowEnabled(theme->isBackgroundDropShadowEnabled());
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}
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// decorateLegend is only called when theme is forcibly initialized
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void ChartThemeManager::decorateLegend(QLegend *legend, ChartTheme *theme) const
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{
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legend->setPen(theme->axisLinePen());
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legend->setBrush(theme->chartBackgroundGradient());
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legend->setFont(theme->labelFont());
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legend->setLabelBrush(theme->labelBrush());
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}
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int ChartThemeManager::createIndexKey(QList<int> keys) const
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{
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std::sort(keys.begin(), keys.end());
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int key = 0;
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QList<int>::iterator i;
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i = keys.begin();
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while (i != keys.end()) {
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if (*i != key)
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break;
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key++;
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i++;
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}
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return key;
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}
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int ChartThemeManager::seriesCount(QAbstractSeries::SeriesType type) const
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{
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int count = 0;
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QList<QAbstractSeries *> series = m_seriesMap.keys();
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foreach(QAbstractSeries *s, series) {
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if (s->type() == type)
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count++;
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}
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return count;
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}
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void ChartThemeManager::handleSeriesAdded(QAbstractSeries *series)
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{
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int key = createIndexKey(m_seriesMap.values());
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m_seriesMap.insert(series,key);
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series->d_ptr->initializeTheme(key,m_theme.data(),false);
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}
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void ChartThemeManager::handleSeriesRemoved(QAbstractSeries *series)
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{
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m_seriesMap.remove(series);
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}
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void ChartThemeManager::handleAxisAdded(QAbstractAxis *axis)
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{
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m_axisList.append(axis);
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axis->d_ptr->initializeTheme(m_theme.data(),false);
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}
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void ChartThemeManager::handleAxisRemoved(QAbstractAxis *axis)
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{
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m_axisList.removeAll(axis);
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}
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void ChartThemeManager::updateSeries(QAbstractSeries *series)
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{
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if(m_seriesMap.contains(series)){
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series->d_ptr->initializeTheme(m_seriesMap[series],m_theme.data(),false);
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}
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}
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QList<QGradient> ChartThemeManager::generateSeriesGradients(const QList<QColor>& colors)
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{
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QList<QGradient> result;
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// Generate gradients in HSV color space
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foreach (const QColor &color, colors) {
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QLinearGradient g;
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qreal h = color.hsvHueF();
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qreal s = color.hsvSaturationF();
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QColor start = color;
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start.setHsvF(h, 0.0, 1.0);
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g.setColorAt(0.0, start);
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g.setColorAt(0.5, color);
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QColor end = color;
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end.setHsvF(h, s, 0.25);
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g.setColorAt(1.0, end);
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result << g;
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}
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return result;
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}
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QColor ChartThemeManager::colorAt(const QColor &start, const QColor &end, qreal pos)
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{
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Q_ASSERT(pos >= 0.0 && pos <= 1.0);
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qreal r = start.redF() + ((end.redF() - start.redF()) * pos);
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qreal g = start.greenF() + ((end.greenF() - start.greenF()) * pos);
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qreal b = start.blueF() + ((end.blueF() - start.blueF()) * pos);
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QColor c;
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c.setRgbF(r, g, b);
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return c;
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}
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QColor ChartThemeManager::colorAt(const QGradient &gradient, qreal pos)
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{
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Q_ASSERT(pos >= 0 && pos <= 1.0);
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QGradientStops stops = gradient.stops();
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int count = stops.count();
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// find previous stop relative to position
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QGradientStop prev = stops.first();
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for (int i = 0; i < count; i++) {
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QGradientStop stop = stops.at(i);
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if (pos > stop.first)
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prev = stop;
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// given position is actually a stop position?
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if (pos == stop.first) {
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//qDebug() << "stop color" << pos;
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return stop.second;
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}
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}
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// find next stop relative to position
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QGradientStop next = stops.last();
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for (int i = count - 1; i >= 0; i--) {
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QGradientStop stop = stops.at(i);
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if (pos < stop.first)
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next = stop;
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}
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//qDebug() << "prev" << prev.first << "pos" << pos << "next" << next.first;
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qreal range = next.first - prev.first;
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qreal posDelta = pos - prev.first;
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qreal relativePos = posDelta / range;
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//qDebug() << "range" << range << "posDelta" << posDelta << "relativePos" << relativePos;
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return colorAt(prev.second, next.second, relativePos);
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}
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#include "moc_chartthememanager_p.cpp"
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QT_CHARTS_END_NAMESPACE
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