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Current Path : /proc/thread-self/root/proc/thread-self/root/lib64/tcl8.6/Tix8.4.3/ |
Current File : //proc/thread-self/root/proc/thread-self/root/lib64/tcl8.6/Tix8.4.3/Variable.tcl |
# -*- mode: TCL; fill-column: 75; tab-width: 8; coding: iso-latin-1-unix -*- # # $Id: Variable.tcl,v 1.4 2001/12/09 05:04:02 idiscovery Exp $ # # Variable.tcl -- # # Routines in this file are used to set up and operate variables # for classes that support the -variable option # # Copyright (c) 1993-1999 Ioi Kim Lam. # Copyright (c) 2000-2001 Tix Project Group. # # See the file "license.terms" for information on usage and redistribution # of this file, and for a DISCLAIMER OF ALL WARRANTIES. # # tixVariable:ConfigVariable -- # # Set up the -variable option for the object $w # # Side effects: # # data(-variable) is changed to the name of the global variable # if the global variable exists, data(-value) takes the value of this # variable. # if the global variable does not exist, it is created with the # current data(-value) # # Return value: # # true is data(-value) is changed, indicating that data(-command) # should be invoked. # proc tixVariable:ConfigVariable {w arg} { upvar #0 $w data set changed 0 if {$data(-variable) != ""} { uplevel #0 \ [list trace vdelete $data(-variable) w "tixVariable:TraceProc $w"] } if {$arg != ""} { if {[uplevel #0 info exists [list $arg]]} { # This global variable exists, we use its value # set data(-value) [uplevel #0 set [list $arg]] set changed 1 } else { # This global variable does not exist; let's set it # uplevel #0 [list set $arg $data(-value)] } uplevel #0 \ [list trace variable $arg w "tixVariable:TraceProc $w"] } return $changed } proc tixVariable:UpdateVariable {w} { upvar #0 $w data if {$data(-variable) != ""} { uplevel #0 \ [list trace vdelete $data(-variable) w "tixVariable:TraceProc $w"] uplevel #0 \ [list set $data(-variable) $data(-value)] uplevel #0 \ [list trace variable $data(-variable) w "tixVariable:TraceProc $w"] # just in case someone has another trace and restricted my change # set data(-value) [uplevel #0 set [list $data(-variable)]] } } proc tixVariable:TraceProc {w name1 name2 op} { upvar #0 $w data set varname $data(-variable) if {[catch {$w config -value [uplevel #0 [list set $varname]]} err]} { uplevel #0 [list set $varname [list [$w cget -value]]] error $err } return } proc tixVariable:DeleteVariable {w} { upvar #0 $w data # Must delete the trace command of the -variable # if {$data(-variable) != ""} { uplevel #0 \ [list trace vdelete $data(-variable) w "tixVariable:TraceProc $w"] } }