ChartDirector Ver 3.0 (C++ Edition)

Enhanced Area Chart




This example extends the Simple Area Chart example by decorating the chart using a number of chart formatting features.

Source Code Listing

[The following project is available in "cppdemo/enhancedarea".]
#include "chartdir.h" int main(int argc, char *argv[]) { //The data for the area chart double data[] = {30, 28, 40, 55, 75, 68, 54, 60, 50, 62, 75, 65, 75, 89, 60, 55, 53, 35, 50, 66, 56, 48, 52, 65, 62}; //The labels for the area chart const char *labels[] = {"0", "", "", "3", "", "", "6", "", "", "9", "", "", "12", "", "", "15", "", "", "18", "", "", "21", "", "", "24"}; //Create a XYChart object of size 500 x 300 pixels, using 0xf0e090 as //background color, with a black border, and 1 pixel 3D border effect XYChart *c = new XYChart(500, 300, 0xf0e090, 0x0, 1); //Set the plotarea at (55, 50) and of size 420 x 205 pixels, with white //background. Set border and grid line colors to 0xa08040. c->setPlotArea(55, 50, 420, 205, 0xffffff, -1, 0xa08040, 0xa08040, 0xa08040) ; //Add a title box to the chart using 13 pts Arial Bold Italic font. The //title is in CDML and includes embedded images for highlight. The text is //white (0xffffff) on a brown (0x807040) background, with a 1 pixel 3D //border. c->addTitle( "<*block,valign=absmiddle*><*img=star.png*><*img=star.png*> " "Performance Enhancer <*img=star.png*><*img=star.png*><*/*>", "arialbi.ttf", 13, 0xffffff)->setBackground(0x807040, -1, 1); //Add a title to the y axis c->yAxis()->setTitle("Energy Concentration (KJ per liter)"); //Set the labels on the x axis c->xAxis()->setLabels(StringArray(labels, sizeof(labels)/sizeof(*labels))); //Add a title to the x axis using CDML c->xAxis()->setTitle( "<*block,valign=absmiddle*><*img=clock.png*> Elapsed Time (hour)<*/*>") ; //Set the axes width to 2 pixels c->xAxis()->setWidth(2); c->yAxis()->setWidth(2); //Add an area layer to the chart using a semi-transparent gradient color c->addAreaLayer(DoubleArray(data, sizeof(data)/sizeof(*data)), c->gradientColor(0, 50, 0, 255, 0x40ff8000, 0x40ffffff)); //Add a custom CDML text at the bottom right of the plot area as the logo c->addText(475, 255, "<*block,valign=absmiddle*><*img=small_molecule.png*> <*block*>" "<*font=timesbi.ttf,size=10,color=804040*>Molecular\nEngineering<*/*>" )->setAlignment(BottomRight); //output the chart c->makeChart("enhancedarea.png"); //free up resources delete c; return 0; }