ChartDirector Ver 3.0 (C++ Edition)

Depth Bar Chart




ChartDirector allows a XY chart to containing multiple layers of the same or different types. In this example, all layers are 3D bar layers. The bars are drawn in semi-transparent colors to avoid the bars on the front hiding the bars at the back.

Source Code Listing

[The following project is available in "cppdemo/depthbar".]
#include "chartdir.h" int main(int argc, char *argv[]) { //The data for the bar chart double data0[] = {100, 125, 245, 147, 67}; double data1[] = {85, 156, 179, 211, 123}; double data2[] = {97, 87, 56, 267, 157}; //The labels for the bar chart const char *labels[] = {"Mon", "Tue", "Wed", "Thu", "Fri"}; //Create a XYChart object of size 500 x 320 pixels XYChart *c = new XYChart(500, 320); //Set the plotarea at (100, 40) and of size 280 x 240 pixels c->setPlotArea(100, 40, 280, 240); //Add a legend box at (405, 100) c->addLegend(405, 100); //Add a title to the chart c->addTitle("Weekday Network Load"); //Add a title to the y axis. Draw the title upright (font angle = 0) c->yAxis()->setTitle("Average\nWorkload\n(MBytes\nPer Hour)")->setFontAngle( 0); //Set the labels on the x axis c->xAxis()->setLabels(StringArray(labels, sizeof(labels)/sizeof(*labels))); //Add three bar layers, each representing one data set. The bars are drawn //in semi-transparent colors. c->addBarLayer(DoubleArray(data0, sizeof(data0)/sizeof(*data0)), 0x808080ff, "Server # 1", 5); c->addBarLayer(DoubleArray(data1, sizeof(data1)/sizeof(*data1)), 0x80ff0000, "Server # 2", 5); c->addBarLayer(DoubleArray(data2, sizeof(data2)/sizeof(*data2)), 0x8000ff00, "Server # 3", 5); //output the chart c->makeChart("depthbar.png"); //free up resources delete c; return 0; }