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button.tcl
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1992-07-28
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# button.tcl --
#
# This file contains Tcl procedures used to manage Tk buttons.
#
# $Header: /user6/ouster/wish/scripts/RCS/button.tcl,v 1.7 92/07/28 15:41:13 ouster Exp $ SPRITE (Berkeley)
#
# Copyright 1992 Regents of the University of California
# Permission to use, copy, modify, and distribute this
# software and its documentation for any purpose and without
# fee is hereby granted, provided that this copyright
# notice appears in all copies. The University of California
# makes no representations about the suitability of this
# software for any purpose. It is provided "as is" without
# express or implied warranty.
#
# The procedure below is invoked when the mouse pointer enters a
# button widget. It records the button we're in and changes the
# state of the button to active unless the button is disabled.
proc tk_butEnter w {
global tk_priv tk_strictMotif
if {[lindex [$w config -state] 4] != "disabled"} {
if {!$tk_strictMotif} {
$w config -state active
}
set tk_priv(window) $w
}
}
# The procedure below is invoked when the mouse pointer leaves a
# button widget. It changes the state of the button back to
# inactive.
proc tk_butLeave w {
global tk_priv tk_strictMotif
if {[lindex [$w config -state] 4] != "disabled"} {
if {!$tk_strictMotif} {
$w config -state normal
}
}
set tk_priv(window) ""
}
# The procedure below is invoked when the mouse button is pressed in
# a button/radiobutton/checkbutton widget. It records information
# (a) to indicate that the mouse is in the button, and
# (b) to save the button's relief so it can be restored later.
proc tk_butDown w {
global tk_priv
set tk_priv(relief) [lindex [$w config -relief] 4]
if {[lindex [$w config -state] 4] != "disabled"} {
$w config -relief sunken
}
}
# The procedure below is invoked when the mouse button is released
# for a button/radiobutton/checkbutton widget. It restores the
# button's relief and invokes the command as long as the mouse
# hasn't left the button.
proc tk_butUp w {
global tk_priv
$w config -relief $tk_priv(relief)
if {($w == $tk_priv(window))
&& ([lindex [$w config -state] 4] != "disabled")} {
uplevel #0 [list $w invoke]
}
}