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Added simple demoLauncher application
Added simple demoLauncher application

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donutbreakdownchart.cpp
94 lines | 2.7 KiB | text/x-c | CppLexer
/****************************************************************************
**
** Copyright (C) 2012 Digia Plc
** All rights reserved.
** For any questions to Digia, please use contact form at http://qt.digia.com
**
** This file is part of the Qt Commercial Charts Add-on.
**
** $QT_BEGIN_LICENSE$
** Licensees holding valid Qt Commercial licenses may use this file in
** accordance with the Qt Commercial License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia.
**
** If you have questions regarding the use of this file, please use
** contact form at http://qt.digia.com
** $QT_END_LICENSE$
**
****************************************************************************/
#include "donutbreakdownchart.h"
#include <QPieSlice>
QTCOMMERCIALCHART_USE_NAMESPACE
//![1]
DonutBreakdownChart::DonutBreakdownChart(QGraphicsItem *parent, Qt::WindowFlags wFlags)
: QChart(parent, wFlags)
{
// create the series for main center pie
mainSeries = new QPieSeries();
mainSeries->setPieSize(0.7);
QChart::addSeries(mainSeries);
}
//![1]
//![2]
void DonutBreakdownChart::addBreakdownSeries(QPieSeries *breakdownSeries, QColor color)
{
// add breakdown series as a slice to center pie
QPieSlice *slice = mainSeries->append(breakdownSeries->name(), breakdownSeries->sum());
// customize the slice
slice->setBrush(color);
slice->setLabelVisible();
slice->setLabelColor(Qt::white);
slice->setLabelPosition(QPieSlice::LabelInsideHorizontal);
// position and customize the breakdown series
breakdownSeries->setPieSize(0.8);
breakdownSeries->setHoleSize(0.7);
breakdownSeries->setLabelsVisible();
foreach (QPieSlice *slice, breakdownSeries->slices()) {
color = color.lighter(115);
slice->setBrush(color);
slice->setLabelFont(QFont("Arial", 8));
}
// add the series to the chart
QChart::addSeries(breakdownSeries);
// recalculate breakdown donut segments
recalculateAngles();
}
//![2]
//![3]
void DonutBreakdownChart::recalculateAngles()
{
qreal angle = 0;
foreach (QPieSlice *slice, mainSeries->slices()) {
QPieSeries *s = find(slice->label());
if (s) {
s->setPieStartAngle(angle);
angle += slice->percentage() * 360.0; // full pie is 360.0
s->setPieEndAngle(angle);
}
}
}
//![3]
//![4]
QPieSeries *DonutBreakdownChart::find(QString seriesName) const
{
// find pieseries by name
foreach (QAbstractSeries *series, QChart::series()) {
QPieSeries *s = qobject_cast<QPieSeries*>(series);
if (!s)
continue;
if (s->name() == seriesName)
return s;
}
return 0;
}
//![4]