NAME

       XmSetColorCalculation   —   A   function  to  set  the  procedure  used  for  default  color  calculation
       "XmSetColorCalculation" "Color functions" "XmSetColorCalculation"

SYNOPSIS

       #include <Xm/Xm.h>
       XmColorProc XmSetColorCalculation(
       XmColorProc color_proc);

DESCRIPTION

       XmSetColorCalculation sets the procedure  to  calculate  default  colors.   This  procedure  is  used  to
       calculate the foreground, top shadow, bottom shadow, and select colors on the basis of a given background
       color.  If called with an argument of NULL, it restores the default procedure used to calculate colors.

       color_proc
                 Specifies the procedure to use for color calculation.

       Following is a description of the XmColorProc type used by XmSetColorCalculation:

       void (*color_proc) (background_color, foreground_color, select_color, top_shadow_color,
       bottom_shadow_color)
               XColor  *background_color;
               XColor  *foreground_color;
               XColor  *select_color;
               XColor  *top_shadow_color;
               XColor  *bottom_shadow_color;
       (void)

       Specifies the procedure used to calculate default colors.  The procedure is passed a pointer to an XColor
       structure  representing  the background color.  The pixel, red, green, and blue members of this structure
       are filled in with values that are valid for the current colormap.

       The procedure is passed pointers to XColor structures representing the foreground,  select,  top  shadow,
       and  bottom  shadow  colors  to be calculated.  The procedure calculates and fills in the red, green, and
       blue members of these structures.  The procedure should not allocate color cells for any of these colors.

       background_color
                 Specifies the background color.

       foreground_color
                 Specifies the foreground color to be calculated.

       select_color
                 Specifies the select color to be calculated.

       top_shadow_color
                 Specifies the top shadow color to be calculated.

       bottom_shadow_color
                 Specifies the bottom shadow color to be calculated.

RETURN

       Returns the color calculation procedure that was used at the time this routine was called.

RELATED

       XmChangeColor(3), XmGetColors(3), and XmGetColorCalculation(3).

                                                                                        XmSetColorCalculation(3)