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XmSetColorCalculation(3X)
OSF/Motif
NAME
  XmSetColorCalculation - A function to set the procedure used for default
  color calculation

SYNOPSIS
  #include <Xm/Xm.h>

  XmColorProc XmSetColorCalculation (color_proc)
	  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;

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

SEE ALSO
  XmChangeColor(3X), XmGetColors(3X), XmGetColorCalculation(3X)

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