XmSetColorCalculation - A function to set the procedure used for default color calculation
#include <Xm/Xm.h>
XmColorProc XmSetColorCalculation (color_proc)
XmColorProc color_proc;
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.
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.
Returns the color calculation procedure that was used at the time this routine was called.
XmChangeColor(3X), XmGetColors(3X), and XmGetColorCalculation(3X).