Tk_MainWindow(3tk) Tk Library Procedures Tk_MainWindow(3tk)__________________________________________________________________________________________________________________________________________________NAME
Tk_MainWindow, Tk_GetNumMainWindows - functions for querying main window information
SYNOPSIS
#include <tk.h>
Tk_Window
Tk_MainWindow(interp)
int
Tk_GetNumMainWindows()
ARGUMENTS
Tcl_Interp *interp (in/out) Interpreter associated with the application.
_________________________________________________________________DESCRIPTION
A main window is a special kind of toplevel window used as the outermost window in an application.
If interp is associated with a Tk application then Tk_MainWindow returns the application's main window. If there is no Tk application asso-
ciated with interp then Tk_MainWindow returns NULL and leaves an error message in interp->result.
Tk_GetNumMainWindows returns a count of the number of main windows currently open in the process.
KEYWORDS
application, main window
Tk 7.0 Tk_MainWindow(3tk)
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Tk_Init(3tk) Tk Library Procedures Tk_Init(3tk)__________________________________________________________________________________________________________________________________________________NAME
Tk_Init, Tk_SafeInit - add Tk to an interpreter and make a new Tk application.
SYNOPSIS
#include <tk.h>
int
Tk_Init(interp)
int
Tk_SafeInit(interp)
ARGUMENTS
Tcl_Interp *interp (in) Interpreter in which to load Tk. Tk should not already be loaded in this interpreter.
_________________________________________________________________DESCRIPTION
Tk_Init is the package initialization procedure for Tk. It is normally invoked by the Tcl_AppInit procedure for an application or by the
load command. Tk_Init adds all of Tk's commands to interp and creates a new Tk application, including its main window. If the initializa-
tion is successful Tk_Init returns TCL_OK; if there is an error it returns TCL_ERROR. Tk_Init also leaves a result or error message in
interp->result.
If there is a variable argv in interp, Tk_Init treats the contents of this variable as a list of options for the new Tk application. The
options may have any of the forms documented for the wish application (in fact, wish uses Tk_Init to process its command-line arguments).
Tk_SafeInit is identical to Tk_Init except that it removes all Tk commands that are considered unsafe. Those commands and the reasons for
their exclusion are:
bell Continuous ringing of the bell is a nuisance.
clipboard
A malicious script could replace the contents of the clipboard with the string "rm -r *" and lead to surprises when the contents of
the clipboard are pasted.
grab Grab can be used to block the user from using any other applications.
menu Menus can be used to cover the entire screen and to steal input from the user.
selection
See clipboard.
send Send can be used to cause unsafe interpreters to execute commands.
tk The tk command recreates the send command, which is unsafe.
tkwait Tkwait can block the containing process forever
toplevel
Toplevels can be used to cover the entire screen and to steal input from the user.
wm If toplevels are ever allowed, wm can be used to remove decorations, move windows around, etc.
KEYWORDS
safe, application, initialization, load, main window
Tk 8.0 Tk_Init(3tk)
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