drilldownchart.cpp Example File

piechartdrilldown/drilldownchart.cpp

  /******************************************************************************
  **
  ** Copyright (C) 2015 The Qt Company Ltd.
  ** Contact: http://www.qt.io/licensing/
  **
  ** This file is part of the Qt Charts module.
  **
  ** $QT_BEGIN_LICENSE:COMM$
  **
  ** Commercial License Usage
  ** Licensees holding valid commercial Qt licenses may use this file in
  ** accordance with the commercial license agreement provided with the
  ** Software or, alternatively, in accordance with the terms contained in
  ** a written agreement between you and The Qt Company. For licensing terms
  ** and conditions see http://www.qt.io/terms-conditions. For further
  ** information use the contact form at http://www.qt.io/contact-us.
  **
  ** $QT_END_LICENSE$
  **
  ******************************************************************************/
  #include "drilldownchart.h"
  #include "drilldownslice.h"

  QT_CHARTS_USE_NAMESPACE

  DrilldownChart::DrilldownChart(QGraphicsItem *parent, Qt::WindowFlags wFlags)
      : QChart(QChart::ChartTypeCartesian, parent, wFlags),
        m_currentSeries(0)
  {

  }

  DrilldownChart::~DrilldownChart()
  {

  }

  void DrilldownChart::changeSeries(QAbstractSeries *series)
  {
      // NOTE: if the series is owned by the chart it will be deleted
      // here the "window" owns the series...
      if (m_currentSeries)
          removeSeries(m_currentSeries);
      m_currentSeries = series;
      addSeries(series);
      setTitle(series->name());
  }

  void DrilldownChart::handleSliceClicked(QPieSlice *slice)
  {
      DrilldownSlice *drilldownSlice = static_cast<DrilldownSlice *>(slice);
      changeSeries(drilldownSlice->drilldownSeries());
  }

  #include "moc_drilldownchart.cpp"