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drilldownslice.cpp Example File

piechartdrilldown/drilldownslice.cpp
/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the Qt Charts module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:GPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
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** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 or (at your option) any later version
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** the Free Software Foundation and appearing in the file LICENSE.GPL3
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#include "drilldownslice.h"

QT_CHARTS_USE_NAMESPACE

DrilldownSlice::DrilldownSlice(qreal value, QString prefix, QAbstractSeries *drilldownSeries)
    : m_drilldownSeries(drilldownSeries),
      m_prefix(prefix)
{
    setValue(value);
    updateLabel();
    setLabelFont(QFont("Arial", 8));
    connect(this, &DrilldownSlice::percentageChanged, this, &DrilldownSlice::updateLabel);
    connect(this, &DrilldownSlice::hovered, this, &DrilldownSlice::showHighlight);
}

DrilldownSlice::~DrilldownSlice()
{

}

QAbstractSeries *DrilldownSlice::drilldownSeries() const
{
    return m_drilldownSeries;
}

void DrilldownSlice::updateLabel()
{
    QString label = m_prefix;
    label += " $";
    label += QString::number(this->value());
    label += ", ";
    label += QString::number(this->percentage() * 100, 'f', 1);
    label += "%";
    setLabel(label);
}

void DrilldownSlice::showHighlight(bool show)
{
    setLabelVisible(show);
    setExploded(show);
}

#include "moc_drilldownslice.cpp"
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