This example demonstrates the effects of different 3D angles.
ChartDirector allows the 3D depth and angles to be configured using
PieChart.set3D and
PieChart.set3D2.
This example also demonstrates how to disable sector labels. This is setting their colors to
Transparent using
PieChart.setLabelStyle.
The following is the command line version of the code in "cppdemo/threedanglepie". The MFC version of the code is in "mfcdemo/mfcdemo". The Qt Widgets version of the code is in "qtdemo/qtdemo". The QML/Qt Quick version of the code is in "qmldemo/qmldemo".
#include "chartdir.h"
#include <stdio.h>
void createChart(int chartIndex, const char *filename)
{
char buffer[1024];
// the tilt angle of the pie
int angle = chartIndex * 15;
// The data for the pie chart
double data[] = {25, 18, 15, 12, 8, 30, 35};
const int data_size = (int)(sizeof(data)/sizeof(*data));
// Create a PieChart object of size 100 x 110 pixels
PieChart* c = new PieChart(100, 110);
// Set the center of the pie at (50, 55) and the radius to 38 pixels
c->setPieSize(50, 55, 38);
// Set the depth and tilt angle of the 3D pie (-1 means auto depth)
c->set3D(-1, angle);
// Add a title showing the tilt angle
sprintf(buffer, "Tilt = %d deg", angle);
c->addTitle(buffer, "Arial", 8);
// Set the pie data
c->setData(DoubleArray(data, data_size));
// Disable the sector labels by setting the color to Transparent
c->setLabelStyle("", 8, Chart::Transparent);
// Output the chart
c->makeChart(filename);
//free up resources
delete c;
}
int main(int argc, char *argv[])
{
createChart(0, "threedanglepie0.png");
createChart(1, "threedanglepie1.png");
createChart(2, "threedanglepie2.png");
createChart(3, "threedanglepie3.png");
createChart(4, "threedanglepie4.png");
createChart(5, "threedanglepie5.png");
createChart(6, "threedanglepie6.png");
return 0;
}
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