##// END OF EJS Templates
Added a pie chart customization example and refactoring the pie interface.
Added a pie chart customization example and refactoring the pie interface.

File last commit:

r434:52aa7c3abf86
r437:8d9e377a1065
Show More
charttheme.cpp
328 lines | 9.5 KiB | text/x-c | CppLexer
#include "charttheme_p.h"
#include "qchart.h"
#include "qchartaxis.h"
#include <QTime>
//series
#include "qbarset.h"
#include "qbarseries.h"
#include "qstackedbarseries.h"
#include "qpercentbarseries.h"
#include "qlineseries.h"
#include "qareaseries.h"
#include "qscatterseries.h"
#include "qpieseries.h"
#include "qpieslice.h"
#include "qsplineseries.h"
//items
#include "axisitem_p.h"
#include "barpresenter_p.h"
#include "stackedbarpresenter_p.h"
#include "percentbarpresenter_p.h"
#include "linechartitem_p.h"
#include "areachartitem_p.h"
#include "scatterpresenter_p.h"
#include "piepresenter_p.h"
#include "splinepresenter_p.h"
//themes
#include "chartthemevanilla_p.h"
#include "chartthemeicy_p.h"
#include "chartthemegrayscale_p.h"
#include "chartthemescientific_p.h"
QTCOMMERCIALCHART_BEGIN_NAMESPACE
/* TODO
case QChart::ChartThemeUnnamed1:
m_seriesThemes.append(SeriesTheme(QColor(QRgb(0xff3fa9f5)), 2));
m_seriesThemes.append(SeriesTheme(QColor(QRgb(0xff7AC943)), 2));
m_seriesThemes.append(SeriesTheme(QColor(QRgb(0xffFF931E)), 2));
m_seriesThemes.append(SeriesTheme(QColor(QRgb(0xffFF1D25)), 2));
m_seriesThemes.append(SeriesTheme(QColor(QRgb(0xffFF7BAC)), 2));
m_gradientStartColor = QColor(QRgb(0xfff3dc9e));
m_gradientEndColor = QColor(QRgb(0xffafafaf));
*/
ChartTheme::ChartTheme(QChart::ChartTheme id)
{
m_id = id;
m_seriesColor.append(QRgb(0xff000000));
m_seriesColor.append(QRgb(0xff707070));
m_gradientStartColor = QColor(QRgb(0xffffffff));
m_gradientEndColor = QColor(QRgb(0xffafafaf));
qsrand(QTime(0,0,0).secsTo(QTime::currentTime()));
}
ChartTheme* ChartTheme::createTheme(QChart::ChartTheme theme)
{
switch(theme) {
case QChart::ChartThemeDefault:
return new ChartTheme();
case QChart::ChartThemeVanilla:
return new ChartThemeVanilla();
case QChart::ChartThemeIcy:
return new ChartThemeIcy();
case QChart::ChartThemeGrayscale:
return new ChartThemeGrayscale();
case QChart::ChartThemeScientific:
return new ChartThemeScientific();
}
}
void ChartTheme::decorate(QChart* chart)
{
QLinearGradient backgroundGradient;
backgroundGradient.setColorAt(0.0, m_gradientStartColor);
backgroundGradient.setColorAt(1.0, m_gradientEndColor);
backgroundGradient.setCoordinateMode(QGradient::ObjectBoundingMode);
chart->setChartBackgroundBrush(backgroundGradient);
}
//TODO helper to by removed later
void ChartTheme::decorate(ChartItem* item, QSeries* series,int count)
{
switch(series->type())
{
case QSeries::SeriesTypeLine: {
QLineSeries* s = static_cast<QLineSeries*>(series);
LineChartItem* i = static_cast<LineChartItem*>(item);
decorate(i,s,count);
break;
}
case QSeries::SeriesTypeArea: {
QAreaSeries* s = static_cast<QAreaSeries*>(series);
AreaChartItem* i = static_cast<AreaChartItem*>(item);
decorate(i,s,count);
break;
}
case QSeries::SeriesTypeBar: {
QBarSeries* b = static_cast<QBarSeries*>(series);
BarPresenter* i = static_cast<BarPresenter*>(item);
decorate(i,b,count);
break;
}
case QSeries::SeriesTypeStackedBar: {
QStackedBarSeries* s = static_cast<QStackedBarSeries*>(series);
StackedBarPresenter* i = static_cast<StackedBarPresenter*>(item);
decorate(i,s,count);
break;
}
case QSeries::SeriesTypePercentBar: {
QPercentBarSeries* s = static_cast<QPercentBarSeries*>(series);
PercentBarPresenter* i = static_cast<PercentBarPresenter*>(item);
decorate(i,s,count);
break;
}
case QSeries::SeriesTypeScatter: {
QScatterSeries* s = qobject_cast<QScatterSeries*>(series);
Q_ASSERT(s);
ScatterPresenter* i = static_cast<ScatterPresenter*>(item);
Q_ASSERT(i);
decorate(i, s, count);
break;
}
case QSeries::SeriesTypePie: {
QPieSeries* s = static_cast<QPieSeries*>(series);
PiePresenter* i = static_cast<PiePresenter*>(item);
decorate(i,s,count);
break;
}
default:
qDebug()<<"Wrong item to be decorated by theme";
break;
}
}
void ChartTheme::decorate(AreaChartItem* item, QAreaSeries* series,int count)
{
QPen pen;
QBrush brush;
if(pen != series->pen()){
item->setPen(series->pen());
}else{
pen.setColor(m_seriesColor.at(count%m_seriesColor.size()));
pen.setWidthF(2);
item->setPen(pen);
}
if(brush != series->brush()){
item->setBrush(series->brush());
}else{
QBrush brush(m_seriesColor.at(count%m_seriesColor.size()));
item->setBrush(brush);
}
}
void ChartTheme::decorate(LineChartItem* item, QLineSeries* series,int count)
{
QPen pen;
if(pen != series->pen()){
item->setPen(series->pen());
return;
}
pen.setColor(m_seriesColor.at(count%m_seriesColor.size()));
pen.setWidthF(2);
item->setPen(pen);
}
void ChartTheme::decorate(BarPresenter* item, QBarSeries* series,int count)
{
QList<QBarSet*> sets = series->barSets();
for (int i=0; i<series->barsetCount(); i++) {
sets.at(i)->setBrush(QBrush(m_seriesColor.at(i%m_seriesColor.count())));
}
}
void ChartTheme::decorate(StackedBarPresenter* item, QStackedBarSeries* series,int count)
{
QList<QBarSet*> sets = series->barSets();
for (int i=0; i<series->barsetCount(); i++) {
sets.at(i)->setBrush(QBrush(m_seriesColor.at(i%m_seriesColor.count())));
}
}
void ChartTheme::decorate(PercentBarPresenter* item, QPercentBarSeries* series,int count)
{
QList<QBarSet*> sets = series->barSets();
for (int i=0; i<series->barsetCount(); i++) {
sets.at(i)->setBrush(QBrush(m_seriesColor.at(i%m_seriesColor.count())));
}
}
void ChartTheme::decorate(ScatterPresenter* presenter, QScatterSeries* series, int count)
{
Q_ASSERT(presenter);
Q_ASSERT(series);
QColor color = m_seriesColor.at(count % m_seriesColor.size());
// TODO: define alpha in the theme? or in the series?
//color.setAlpha(120);
QBrush brush(color, Qt::SolidPattern);
presenter->m_markerBrush = brush;
QPen pen(brush, 3);
pen.setColor(color);
presenter->m_markerPen = pen;
}
void ChartTheme::decorate(PiePresenter* item, QPieSeries* series, int /*count*/)
{
// create a list of slice colors based on current theme
int i = 0;
QList<QColor> colors;
while (colors.count() < series->count()) {
// get base color
QColor c = m_seriesColor[i++];
i = i % m_seriesColor.count();
// dont use black colors... looks bad
if (c == Qt::black)
continue;
// by default use the "raw" theme color
if (!colors.contains(c)) {
colors << c;
continue;
}
// ...ok we need to generate something that looks like the same color
// but different lightness
int tryCount = 0;
while (tryCount++ < 100) {
// find maximum value we can raise the lightness
int lMax = 255;
if (lMax > 255 - c.red())
lMax = 255 - c.red();
if (lMax > 255 - c.green())
lMax = 255 - c.green();
if (lMax > 255 - c.blue())
lMax = 255 - c.blue();
// find maximum value we can make it darker
int dMax = 255;
if (dMax > c.red())
dMax = c.red();
if (dMax > c.green())
dMax = c.green();
if (dMax > c.blue())
dMax = c.blue();
int max = dMax + lMax;
if (max == 0) {
// no room to make color lighter or darker...
qDebug() << "cannot generate a color for pie!";
break;
}
// generate random color
int r = c.red() - dMax;
int g = c.green() - dMax;
int b = c.blue() - dMax;
int d = qrand() % max;
c.setRgb(r+d, g+d, b+d);
// found a unique color?
if (!colors.contains(c))
break;
}
qDebug() << "generated a color for pie" << c;
colors << c;
}
// finally update colors
foreach (QPieSlice* s, series->slices()) {
QColor c = colors.takeFirst();
s->setPen(c);
s->setBrush(c);
}
}
void ChartTheme::decorate(QChartAxis* axis,AxisItem* item)
{
//TODO: dummy defults for now
axis->setLabelsBrush(Qt::black);
axis->setLabelsPen(Qt::NoPen);
axis->setShadesPen(Qt::NoPen);
axis->setShadesOpacity(0.5);
}
void ChartTheme::decorate(SplinePresenter* presenter, QSplineSeries* series, int count)
{
Q_ASSERT(presenter);
Q_ASSERT(series);
QPen pen;
if(pen != series->pen()){
presenter->setPen(series->pen());
return;
}
pen.setColor(m_seriesColor.at(count%m_seriesColor.size()));
pen.setWidthF(series->pen().widthF());
presenter->setPen(pen);
// QColor color = m_seriesColor.at(count % m_seriesColor.size());
// TODO: define alpha in the theme? or in the series?
//color.setAlpha(120);
// QBrush brush(color, Qt::SolidPattern);
// presenter->m_markerBrush = brush;
// QPen pen(brush, 3);
// pen.setColor(color);
// presenter->m_markerPen = pen;
}
QTCOMMERCIALCHART_END_NAMESPACE