1 files changed, 110 insertions, 0 deletions
diff --git a/examples/charts/donutbreakdown/donutbreakdownchart.cpp b/examples/charts/donutbreakdown/donutbreakdownchart.cpp
new file mode 100644
index 00000000..5272f105
--- /dev/null
+++ b/examples/charts/donutbreakdown/donutbreakdownchart.cpp
@@ -0,0 +1,110 @@
+/****************************************************************************
+**
+** Copyright (C) 2014 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 Enterprise Charts Add-on.
+**
+** $QT_BEGIN_LICENSE$
+** Licensees holding valid Qt Enterprise licenses may use this file in
+** accordance with the Qt Enterprise 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 "mainslice.h"
+#include <QPieSlice>
+#include <QPieLegendMarker>
+
+QT_CHARTS_USE_NAMESPACE
+
+//![1]
+DonutBreakdownChart::DonutBreakdownChart(QGraphicsItem *parent, Qt::WindowFlags wFlags)
+    : QChart(QChart::ChartTypeCartesian, parent, wFlags)
+{
+    // create the series for main center pie
+    m_mainSeries = new QPieSeries();
+    m_mainSeries->setPieSize(0.7);
+    QChart::addSeries(m_mainSeries);
+}
+//![1]
+
+//![2]
+void DonutBreakdownChart::addBreakdownSeries(QPieSeries *breakdownSeries, QColor color)
+{
+    QFont font("Arial", 8);
+
+    // add breakdown series as a slice to center pie
+    MainSlice *mainSlice = new MainSlice(breakdownSeries);
+    mainSlice->setName(breakdownSeries->name());
+    mainSlice->setValue(breakdownSeries->sum());
+    m_mainSeries->append(mainSlice);
+
+    // customize the slice
+    mainSlice->setBrush(color);
+    mainSlice->setLabelVisible();
+    mainSlice->setLabelColor(Qt::white);
+    mainSlice->setLabelPosition(QPieSlice::LabelInsideHorizontal);
+    mainSlice->setLabelFont(font);
+
+    // 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(font);
+    }
+
+    // add the series to the chart
+    QChart::addSeries(breakdownSeries);
+
+    // recalculate breakdown donut segments
+    recalculateAngles();
+
+    // update customize legend markers
+    updateLegendMarkers();
+}
+//![2]
+
+//![3]
+void DonutBreakdownChart::recalculateAngles()
+{
+    qreal angle = 0;
+    foreach (QPieSlice *slice, m_mainSeries->slices()) {
+        QPieSeries *breakdownSeries = qobject_cast<MainSlice *>(slice)->breakdownSeries();
+        breakdownSeries->setPieStartAngle(angle);
+        angle += slice->percentage() * 360.0; // full pie is 360.0
+        breakdownSeries->setPieEndAngle(angle);
+    }
+}
+//![3]
+
+//![4]
+void DonutBreakdownChart::updateLegendMarkers()
+{
+    // go through all markers
+    foreach (QAbstractSeries *series, QChart::series()) {
+        foreach (QLegendMarker *marker, legend()->markers(series)) {
+            QPieLegendMarker *pieMarker = qobject_cast<QPieLegendMarker *>(marker);
+            if (series == m_mainSeries) {
+                // hide markers from main series
+                pieMarker->setVisible(false);
+            } else {
+                // modify markers from breakdown series
+                pieMarker->setLabel(QString("%1 %2%")
+                                    .arg(pieMarker->slice()->label())
+                                    .arg(pieMarker->slice()->percentage() * 100, 0, 'f', 2));
+                pieMarker->setFont(QFont("Arial", 8));
+            }
+        }
+    }
+}
+//![4]