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NAME
Tk_GetPixels, Tk_GetScreenMM - translate between strings and screen units
SYNOPSIS
#include <tk.h>
int
 Tk_GetPixels(interp, tkwin, string, intPtr)
int
 Tk_GetScreenMM(interp, tkwin, string, doublePtr)
ARGUMENTS
Tcl_Interp *interp    (in)
 Interpreter to use for error reporting.
Tk_Window    tkwin      (in)
 Window    whose screen geometry determines the conversion between absolute units and pixels.
<none>
 The number specifies a distance in pixels.
c
 The number specifies a distance in centimeters on the screen.
i
 The number specifies a distance in inches on the screen.
m
 The number specifies a distance in millimeters on the screen.
p
 The number specifies a distance in printer's points (1/72 inch) on the screen.
Tk_GetPixels converts string to the nearest even number of pixels and stores that value at *intPtr. Tk_GetScreenMM converts string to millimeters and stores the doubleprecision floating-point result at *doublePtr.
Both procedures return TCL_OK under normal circumstances. If an error occurs (e.g. string contains a number followed by a character that isn't one of the ones above) then TCL_ERROR is returned and an error message is left in interp->result.
KEYWORDS
centimeters, convert, inches, millimeters, pixels, points, screen units