/*-----------------------------------------------------------------------------
	File:	        UgGraphColorsAdjust.c	
	Description:	demo modifying color

            PTC             File
   Date   Version   Author  Vers  Comment
--------- -------  -------- ----- ---------------------------------------------
04-dec-97 H-02-02  AWY/CHI    $$1 setup
-----------------------------------------------------------------------------*/

/*---------------------- Pro/Toolkit Includes ------------------------*/
#include <ProToolkit.h>
#include <ProGraphic.h>
#include <ProView.h>
#include <ProColor.h>

/*---------------------- Application Includes ------------------------*/
#include <TestError.h>

/*---------------------- Function Prototypes -------------------------*/
ProError UserAdjustHalftone();


ProError UserAdjustHalftone(dummy, lighter)
char *dummy;
int lighter;
{
    ProColormap colors;
    ProError err;

    err=ProColormapGet(PRO_COLOR_HALF_TONE,&colors);
    ERROR_CHECK("UserAdjustHalftone","ProColormapGet",err);

    if(lighter)
    {
        colors.red  += 20;
        colors.green+= 20;
        colors.blue += 20;
    }
    else
    {
        colors.red  -= 20;
        colors.green-= 20;
        colors.blue -= 20;
    }

    err=ProColormapSet(PRO_COLOR_HALF_TONE,&colors);
    ERROR_CHECK("UserAdjustHalftone","ProColormapSet",err);

    err=ProWindowRefresh(-1);
    ERROR_CHECK("UserAdjustHalftone","ProWindowRefresh",err);
}