gdc_pie_samp.c

/* GDCHART 0.10.0dev  PIE SAMPLE  2 Nov 2000 */
/* Copyright Bruce Verderaime 1998-2004 */

/* creates a file "pie.png".  Can be stdout for CGI use. */
/*  vi: :set tabstop=4 */

#include <stdio.h>
#include <math.h>

#include "gdc.h"
#include "gdcpie.h"

main( int argc, char *argv[] )
{
    /* labels */
    char        *lbl[] = { "CPQ\n(DEC)",
                           "HP",
                           "SCO",
                           "IBM",
                           "SGI",
                           "SUN\nSPARC",
                           "other" }; 
    /* values to chart */
    float        p[] = { 12.5,
                         20.1,
                         2.0,
                         22.0,
                         5.0,
                         18.0,
                         13.0 };

    FILE        *fp = fopen( "pie.png", "wb" );

    /* set which slices to explode, and by how much */
    int             expl[] = { 0, 0, 0, 0, 0, 20, 0 };

    /* set missing slices */
    unsigned char   missing[] = { FALSE, FALSE, FALSE, FALSE, FALSE, FALSE, TRUE };

    /* colors */
    unsigned long   clr[] = { 0xFF4040L, 0x80FF80L, 0x8080FFL, 0xFF80FFL, 0xFFFF80L, 0x80FFFFL, 0x0080FFL };

    /* set options  */
    /* a lot of options are set here for illustration */
    /* none need be - see gdcpie.h for defaults */
    /* GDCPIE_title = "Sample\nPIE"; */
    GDCPIE_label_line = TRUE;
    GDCPIE_label_dist = 15;             /* dist. labels to slice edge */
                                        /* can be negative */
    GDCPIE_LineColor = 0x000000L;
    GDCPIE_label_size = GDC_SMALL;
    GDCPIE_3d_depth  = 25;
    GDCPIE_3d_angle  = 180;             /* 0 - 359 */
    GDCPIE_perspective = 70;                /* 0 - 99 */
    GDCPIE_explode   = expl;            /* default: NULL - no explosion */
    GDCPIE_Color     = clr;
    GDCPIE_BGColor   = 0xFFFFFFL;
/*  GDCPIE_EdgeColor = 0x000000L;          default is GDCPIE_NOCOLOR */ 
                                        /* for no edging */
    GDCPIE_missing   = missing;         /* default: NULL - none missing */

                                        /* add percentage to slice label */
                                        /* below the slice label */
    GDCPIE_percent_labels = GDCPIE_PCT_BELOW;
    GDC_image_type     = GDC_PNG;
    /* call the lib */
    GDC_out_pie( 300,           /* width */
                 200,           /* height */
                 fp,            /* open file pointer */
                 GDC_3DPIE,     /* or GDC_2DPIE */
                 7,             /* number of slices */
                 NULL,          /* can be NULL */
                 p );           /* data array */

    fclose( fp );
    exit( 0 );
}