NAME

XmSetColorCalculation − A function to set the procedure used for default color calculation

SYNOPSIS

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

XmColorProccolor_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;

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_colorSpecifies the background color.

foreground_colorSpecifies the foreground color to be calculated.

select_colorSpecifies the select color to be calculated.

top_shadow_colorSpecifies the top shadow color to be calculated.

bottom_shadow_colorSpecifies the bottom shadow color to be calculated.

RETURN VALUE

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

RELATED INFORMATION

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

Hewlett-Packard Company  —  Motif Release 1.2: May 1992