suse man page for tk_getscreenmm

Query: tk_getscreenmm

OS: suse

Section: 3

Format: Original Unix Latex Style Formatted with HTML and a Horizontal Scroll Bar

Tk_GetPixelsFromObj(3)					       Tk Library Procedures					    Tk_GetPixelsFromObj(3)

__________________________________________________________________________________________________________________________________________________

NAME
Tk_GetPixelsFromObj, Tk_GetPixels, Tk_GetMMFromObj, Tk_GetScreenMM - translate between strings and screen units
SYNOPSIS
#include <tk.h> int Tk_GetPixelsFromObj(interp, tkwin, objPtr, intPtr) int Tk_GetPixels(interp, tkwin, string, intPtr) int Tk_GetMMFromObj(interp, tkwin, objPtr, doublePtr) 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. Tcl_Obj *objPtr (in/out) String value specifies a distance on the screen; internal rep will be modified to cache converted dis- tance. const char *string (in) Same as objPtr except specification of distance is passed as a string. int *intPtr (out) Pointer to location in which to store converted distance in pixels. double *doublePtr (out) Pointer to location in which to store converted distance in millimeters. _________________________________________________________________
DESCRIPTION
These procedures take as argument a specification of distance on the screen (objPtr or string) and compute the corresponding distance either in integer pixels or floating-point millimeters. In either case, objPtr or string specifies a screen distance as a floating-point number followed by one of the following characters that indicates units: <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_GetPixelsFromObj converts the value of objPtr to the nearest even number of pixels and stores that value at *intPtr. It returns TCL_OK under normal circumstances. If an error occurs (e.g. objPtr contains a number followed by a character that is not one of the ones above) then TCL_ERROR is returned and an error message is left in interp's result if interp is not NULL. Tk_GetPixelsFromObj caches information about the return value in objPtr, which speeds up future calls to Tk_GetPixelsFromObj with the same objPtr. Tk_GetPixels is identical to Tk_GetPixelsFromObj except that the screen distance is specified with a string instead of an object. This prevents Tk_GetPixels from caching the return value, so Tk_GetAnchor is less efficient than Tk_GetPixelsFromObj. Tk_GetMMFromObj and Tk_GetScreenMM are similar to Tk_GetPixelsFromObj and Tk_GetPixels (respectively) except that they convert the screen distance to millimeters and store a double-precision floating-point result at *doublePtr.
KEYWORDS
centimeters, convert, inches, millimeters, pixels, points, screen units Tk 8.1 Tk_GetPixelsFromObj(3)
Related Man Pages
tk_getmmfromobj(3) - mojave
tk_getmmfromobj(3) - centos
tk_getpixels(3) - suse
tk_getscreenmm(3) - suse
tk_getpixelsfromobj(3) - osx
Similar Topics in the Unix Linux Community
Getting command output to putty window title.
Migrating to UNIX
Tar Command
The Future of the PM (Private Message) System at UNIX.com
Shopt -s histappend