Tcl/Tk in a Nutshell

Name

tk

tk operation [arg arg...]

The tk command provides access to miscellaneous elements of Tk’s internal state. The following operations are defined:

tk appname newName

Change the name of the application to newName. If the name newName is already in use, a suffix of the form #2 or #3 is appended to make the name unique. If newName is not given, the application’s current name is returned. As a general rule, the application name should not begin with a capital letter, as that form is reserved for class names. If sends have been disabled by deleting the send command, this command will reenable them and recreate the send command.

tk scaling [-displayof window] [number]

Set the scaling factor for conversion between physical units (e.g., points or inches) and pixels. Number is a floating-point value that specifies the number of pixels per point (1/72 inch) on window’s display. If window is not given, it defaults to the main window. If number is omitted, the current scaling factor is returned.