//      Bar chart demo.
//

#include "plcdemos.h"

void
plfbox( PLFLT x0, PLFLT y0 );

//--------------------------------------------------------------------------
// main
//
// Does a simple bar chart, using color fill.  If color fill is
// unavailable, pattern fill is used instead (automatic).
//--------------------------------------------------------------------------

int
main( int argc, const char *argv[] )
{
    int          i;
    char         string[20];
    PLFLT        y0[10];

    static PLFLT pos[]   = { 0.0, 0.25, 0.5, 0.75, 1.0 };
    static PLFLT red[]   = { 0.0, 0.25, 0.5, 1.0, 1.0 };
    static PLFLT green[] = { 1.0, 0.5, 0.5, 0.5, 1.0 };
    static PLFLT blue[]  = { 1.0, 1.0, 0.5, 0.25, 0.0 };

// Parse and process command line arguments

    (void) plparseopts( &argc, argv, PL_PARSE_FULL );

// Initialize plplot

    plinit();

    pladv( 0 );
    plvsta();
    plwind( 1980.0, 1990.0, 0.0, 35.0 );
    plbox( "bc", 1.0, 0, "bcnv", 10.0, 0 );
    plcol0( 2 );
    pllab( "Year", "Widget Sales (millions)", "#frPLplot Example 12" );

    y0[0] = 5;
    y0[1] = 15;
    y0[2] = 12;
    y0[3] = 24;
    y0[4] = 28;
    y0[5] = 30;
    y0[6] = 20;
    y0[7] = 8;
    y0[8] = 12;
    y0[9] = 3;

    plscmap1l( 1, 5, pos, red, green, blue, NULL );

    for ( i = 0; i < 10; i++ )
    {
        //plcol0(i + 1);
        plcol1( i / 9.0 );
        plpsty( 0 );
        plfbox( ( 1980. + i ), y0[i] );
        sprintf( string, "%.0f", y0[i] );
        plptex( ( 1980. + i + .5 ), ( y0[i] + 1. ), 1.0, 0.0, .5, string );
        sprintf( string, "%d", 1980 + i );
        plmtex( "b", 1.0, ( ( i + 1 ) * .1 - .05 ), 0.5, string );
    }

// Don't forget to call plend() to finish off!

    plend();
    exit( 0 );
}

void
plfbox( PLFLT x0, PLFLT y0 )
{
    PLFLT x[4], y[4];

    x[0] = x0;
    y[0] = 0.;
    x[1] = x0;
    y[1] = y0;
    x[2] = x0 + 1.;
    y[2] = y0;
    x[3] = x0 + 1.;
    y[3] = 0.;
    plfill( 4, x, y );
    plcol0( 1 );
    pllsty( 1 );
    plline( 4, x, y );
}