





This example demonstrates various sector shading effects applicable to 2D pie charts.
ChartDirector 6.0 (C++ Edition)
2D Pie Shading
Source Code Listing
#include "chartdir.h" void createChart(int chartIndex, const char *filename) { // The data for the pie chart double data[] = {18, 30, 20, 15}; // The colors to use for the sectors int colors[] = {0x66aaee, 0xeebb22, 0xbbbbbb, 0x8844ff}; // Create a PieChart object of size 200 x 220 pixels. Use a vertical gradient color from blue // (0000cc) to deep blue (000044) as background. Use rounded corners of 16 pixels radius. PieChart *c = new PieChart(200, 220); c->setBackground(c->linearGradientColor(0, 0, 0, c->getHeight(), 0x0000cc, 0x000044)); c->setRoundedFrame(0xffffff, 16); // Set the center of the pie at (100, 120) and the radius to 80 pixels c->setPieSize(100, 120, 80); // Set the pie data c->setData(DoubleArray(data, (int)(sizeof(data) / sizeof(data[0])))); // Set the sector colors c->setColors(Chart::DataColor, IntArray(colors, (int)(sizeof(colors) / sizeof(colors[0])))); // Demonstrates various shading modes if (chartIndex == 0) { c->addTitle("Default Shading", "bold", 12, 0xffffff); } else if (chartIndex == 1) { c->addTitle("Local Gradient", "bold", 12, 0xffffff); c->setSectorStyle(Chart::LocalGradientShading); } else if (chartIndex == 2) { c->addTitle("Global Gradient", "bold", 12, 0xffffff); c->setSectorStyle(Chart::GlobalGradientShading); } else if (chartIndex == 3) { c->addTitle("Concave Shading", "bold", 12, 0xffffff); c->setSectorStyle(Chart::ConcaveShading); } else if (chartIndex == 4) { c->addTitle("Rounded Edge", "bold", 12, 0xffffff); c->setSectorStyle(Chart::RoundedEdgeShading); } else if (chartIndex == 5) { c->addTitle("Radial Gradient", "bold", 12, 0xffffff); c->setSectorStyle(Chart::RadialShading); } // 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, "pieshading0.png"); createChart(1, "pieshading1.png"); createChart(2, "pieshading2.png"); createChart(3, "pieshading3.png"); createChart(4, "pieshading4.png"); createChart(5, "pieshading5.png"); return 0; } |