
This example demonstrates a stacked radar chart.
This example is similar to the previous Multi-Radar Chart example, except the data are stacked before passing to ChartDirector.
ChartDirector Ver 5.0 (C++ Edition)
Stacked Radar Chart
Source Code Listing
#include "chartdir.h" int main(int argc, char *argv[]) { // The data for the chart double data0[] = {100, 100, 100, 100, 100}; double data1[] = {90, 85, 85, 80, 70}; double data2[] = {80, 65, 65, 75, 45}; // The labels for the chart const char *labels[] = {"Population<*br*><*font=arial.ttf*>6 millions", "GDP<*br*><*font=arial.ttf*>120 billions", "Export<*br*><*font=arial.ttf*>25 billions", "Import<*br*><*font=arial.ttf*>24 billions", "Investments<*br*><*font=arial.ttf*>20 billions"}; // Create a PolarChart object of size 480 x 460 pixels. Set background color to // silver, with 1 pixel 3D border effect PolarChart *c = new PolarChart(480, 460, Chart::silverColor(), 0x000000, 1); // Add a title to the chart using 15 pts Times Bold Italic font. The title text // is white (ffffff) on a deep green (008000) background c->addTitle("Economic Growth", "timesbi.ttf", 15, 0xffffff)->setBackground( 0x008000); // Set plot area center at (240, 270), with 150 pixels radius c->setPlotArea(240, 270, 150); // Use 1 pixel width semi-transparent black (c0000000) lines as grid lines c->setGridColor(0xc0000000, 1, 0xc0000000, 1); // Add a legend box at top-center of plot area (240, 35) using horizontal layout. // Use 10 pts Arial Bold font, with silver background and 1 pixel 3D border // effect. LegendBox *b = c->addLegend(240, 35, false, "arialbd.ttf", 10); b->setAlignment(Chart::TopCenter); b->setBackground(Chart::silverColor(), Chart::Transparent, 1); // Add area layers of different colors to represent the data c->addAreaLayer(DoubleArray(data0, sizeof(data0)/sizeof(data0[0])), 0xcc8880, "Year 2004"); c->addAreaLayer(DoubleArray(data1, sizeof(data1)/sizeof(data1[0])), 0xffd080, "Year 1994"); c->addAreaLayer(DoubleArray(data2, sizeof(data2)/sizeof(data2[0])), 0xa0bce0, "Year 1984"); // Set the labels to the angular axis as spokes. c->angularAxis()->setLabels(StringArray(labels, sizeof(labels)/sizeof(labels[0])) ); // Set radial axis from 0 - 100 with a tick every 20 units c->radialAxis()->setLinearScale(0, 100, 20); // Just show the radial axis as a grid line. Hide the axis labels by setting the // label color to Transparent c->radialAxis()->setColors(0xc0000000, Chart::Transparent); // Output the chart c->makeChart("stackradar.png"); //free up resources delete c; return 0; } |