|
ActiveTcl User Guide
|
|
|
- NAME
- tk - Manipulate Tk internal state
- SYNOPSIS
- tk option ?arg arg ...?
- DESCRIPTION
- tk appname
?newName?
- tk caret window
?-x x? ?-y y? ?-height
height?
- tk scaling
?-displayof window? ?number?
- tk useinputmethods
?-displayof window? ?boolean?
- tk
windowingsystem
- KEYWORDS
tk - Manipulate Tk internal state
tk option ?arg arg ...?
The tk command provides access to miscellaneous elements
of Tk's internal state. Most of the information manipulated by this
command pertains to the application as a whole, or to a screen or
display, rather than to a particular window. The command can take
any of a number of different forms depending on the option
argument. The legal forms are:
- tk appname ?newName?
- If newName isn't specified, this command returns the
name of the application (the name that may be used in send commands to communicate with the
application). If newName is specified, then the name of the
application is changed to newName. If the given name is
already in use, then a suffix of the form `` #2'' or ``
#3'' is appended in order to make the name unique. The
command's result is the name actually chosen. newName should
not start with a capital letter. This will interfere with option
processing, since names starting with capitals are assumed to be
classes; as a result, Tk may not be able to find some options for
the application. If sends have been disabled by deleting the send command, this command will
reenable them and recreate the send command.
- tk caret window ?-x x?
?-y y? ?-height height?
- Sets and queries the caret location for the display of the
specified Tk window window. The caret is the per-display
cursor location used for indicating global focus (e.g. to comply
with Microsoft Accessibility guidelines), as well as for location
of the over-the-spot XIM (X Input Methods) or Windows IME windows.
If no options are specified, the last values used for setting the
caret are return in option-value pair format. -x and
-y represent window-relative coordinates, and -height
is the height of the current cursor location, or the height of the
specified window if none is given.
- tk scaling ?-displayof
window? ?number?
- Sets and queries the current scaling factor used by Tk to
convert between physical units (for example, points, inches, or
millimeters) and pixels. The number argument is a floating
point number that specifies the number of pixels per point on
window's display. If the window argument is omitted,
it defaults to the main window. If the number argument is
omitted, the current value of the scaling factor is returned.
A ``point'' is a unit of measurement equal to 1/72 inch. A
scaling factor of 1.0 corresponds to 1 pixel per point, which is
equivalent to a standard 72 dpi monitor. A scaling factor of 1.25
would mean 1.25 pixels per point, which is the setting for a 90 dpi
monitor; setting the scaling factor to 1.25 on a 72 dpi monitor
would cause everything in the application to be displayed 1.25
times as large as normal. The initial value for the scaling factor
is set when the application starts, based on properties of the
installed monitor, but it can be changed at any time. Measurements
made after the scaling factor is changed will use the new scaling
factor, but it is undefined whether existing widgets will resize
themselves dynamically to accomodate the new scaling factor.
- tk useinputmethods ?-displayof
window? ?boolean?
- Sets and queries the state of whether Tk should use XIM (X
Input Methods) for filtering events. The resulting state is
returned. XIM is used in some locales (ie: Japanese, Korean), to
handle special input devices. This feature is only significant on
X. If XIM support is not available, this will always return 0. If
the window argument is omitted, it defaults to the main
window. If the boolean argument is omitted, the current
state is returned. This is turned on by default for the main
display.
- tk windowingsystem
- Returns the current Tk windowing system, one of x11
(X11-based), win32 (MS Windows), classic (Mac OS
Classic), or aqua (Mac OS X Aqua).
application
name, send
Copyright © 1992 The Regents of the University of California.
Copyright © 1994-1996 Sun Microsystems, Inc.
Copyright © 1995-1997 Roger E. Critchlow Jr.