
This example demonstrates a multi-bar chart in which each data set has a different bar shape.
The bar shapes are specified using BarLayer.setBarShape. See Shape Specification on how built-in and custom shapes are defined in ChartDirector.
ChartDirector Ver 5.0 (C++ Edition)
Multi-Shape Bar Chart
Source Code Listing
#include "chartdir.h" int main(int argc, char *argv[]) { // The data for the bar chart double data0[] = {100, 125, 245, 147}; double data1[] = {85, 156, 179, 211}; double data2[] = {97, 87, 56, 267}; const char *labels[] = {"1st Quarter", "2nd Quarter", "3rd Quarter", "4th Quarter"}; // Create a XYChart object of size 600 x 350 pixels XYChart *c = new XYChart(600, 350); // Add a title to the chart using 14 pts Arial Bold Italic font c->addTitle("Annual Product Revenue", "arialbi.ttf", 14); // Set the plot area at (50, 60) and of size 500 x 240. Use two alternative // background colors (f8f8f8 and ffffff) c->setPlotArea(50, 60, 500, 240, 0xf8f8f8, 0xffffff); // Add a legend box at (55, 22) using horizontal layout, with transparent // background c->addLegend(55, 22, false)->setBackground(Chart::Transparent); // Set the x axis labels c->xAxis()->setLabels(StringArray(labels, sizeof(labels)/sizeof(labels[0]))); // Draw the ticks between label positions (instead of at label positions) c->xAxis()->setTickOffset(0.5); // Add a multi-bar layer with 3 data sets and 9 pixels 3D depth BarLayer *layer = c->addBarLayer(Chart::Side, 9); layer->addDataSet(DoubleArray(data0, sizeof(data0)/sizeof(data0[0])), -1, "Product A"); layer->addDataSet(DoubleArray(data1, sizeof(data1)/sizeof(data1[0])), -1, "Product B"); layer->addDataSet(DoubleArray(data2, sizeof(data2)/sizeof(data2[0])), -1, "Product C"); // Set data set 1 to use a bar shape of a 6-pointed star layer->setBarShape(Chart::StarShape(6), 0); // Set data set 2 to use a bar shapre of a 6-sided polygon layer->setBarShape(Chart::PolygonShape(6), 1); // Set data set 3 to use an X bar shape layer->setBarShape(Chart::Cross2Shape(), 2); // Add a title to the y-axis c->yAxis()->setTitle("Revenue (USD in millions)"); // Add a title to the x axis c->xAxis()->setTitle("Year 2005"); // Output the chart c->makeChart("multishapebar.png"); //free up resources delete c; return 0; } |