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GetOption.3
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1994-09-20
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Tk_GetOption(3) Tk Library Procedures
_________________________________________________________________
NAME
Tk_GetOption - retrieve an option from the option database
SYNOPSIS
#include <tk.h>
Tk_Uid
Tk_GetOption(_t_k_w_i_n, _n_a_m_e, _c_l_a_s_s)
ARGUMENTS
Tk_Window _t_k_w_i_n (in) Token for window.
char *_n_a_m_e (in) Name of desired option.
char *_c_l_a_s_s (in) Class of desired option.
Null means there is no class
for this option; do lookup
based on name only.
_________________________________________________________________
DESCRIPTION
This procedure is invoked to retrieve an option from the
database associated with _t_k_w_i_n's main window. If there is
an option for _t_k_w_i_n that matches the given _n_a_m_e or _c_l_a_s_s,
then it is returned in the form of a Tk_Uid. If multiple
options match _n_a_m_e and _c_l_a_s_s, then the highest-priority one
is returned. If no option matches, then NULL is returned.
Tk_GetOption caches options related to _t_k_w_i_n so that succes-
sive calls for the same _t_k_w_i_n will execute much more quickly
than successive calls for different windows.
KEYWORDS
class, name, option, retrieve
Tk 1