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|
# button.tcl --
#
# This file defines the default bindings for Tk label, button,
# checkbutton, and radiobutton widgets and provides procedures
# that help in implementing those bindings.
#
# RCS: @(#) $Id: button.tcl,v 1.9 2000/05/25 16:57:24 ericm Exp $
#
# Copyright (c) 1992-1994 The Regents of the University of California.
# Copyright (c) 1994-1996 Sun Microsystems, Inc.
#
# See the file "license.terms" for information on usage and redistribution
# of this file, and for a DISCLAIMER OF ALL WARRANTIES.
#
#-------------------------------------------------------------------------
# The code below creates the default class bindings for buttons.
#-------------------------------------------------------------------------
if {[string match "macintosh" $tcl_platform(platform)]} {
bind Radiobutton <Enter> {
tkButtonEnter %W
}
bind Radiobutton <1> {
tkButtonDown %W
}
bind Radiobutton <ButtonRelease-1> {
tkButtonUp %W
}
bind Checkbutton <Enter> {
tkButtonEnter %W
}
bind Checkbutton <1> {
tkButtonDown %W
}
bind Checkbutton <ButtonRelease-1> {
tkButtonUp %W
}
}
if {[string match "windows" $tcl_platform(platform)]} {
bind Checkbutton <equal> {
tkCheckRadioInvoke %W select
}
bind Checkbutton <plus> {
tkCheckRadioInvoke %W select
}
bind Checkbutton <minus> {
tkCheckRadioInvoke %W deselect
}
bind Checkbutton <1> {
tkCheckRadioDown %W
}
bind Checkbutton <ButtonRelease-1> {
tkButtonUp %W
}
bind Checkbutton <Enter> {
tkCheckRadioEnter %W
}
bind Radiobutton <1> {
tkCheckRadioDown %W
}
bind Radiobutton <ButtonRelease-1> {
tkButtonUp %W
}
bind Radiobutton <Enter> {
tkCheckRadioEnter %W
}
}
if {[string match "unix" $tcl_platform(platform)]} {
bind Checkbutton <Return> {
if {!$tk_strictMotif} {
tkCheckRadioInvoke %W
}
}
bind Radiobutton <Return> {
if {!$tk_strictMotif} {
tkCheckRadioInvoke %W
}
}
bind Checkbutton <1> {
tkCheckRadioInvoke %W
}
bind Radiobutton <1> {
tkCheckRadioInvoke %W
}
bind Checkbutton <Enter> {
tkButtonEnter %W
}
bind Radiobutton <Enter> {
tkButtonEnter %W
}
}
bind Button <space> {
tkButtonInvoke %W
}
bind Checkbutton <space> {
tkCheckRadioInvoke %W
}
bind Radiobutton <space> {
tkCheckRadioInvoke %W
}
bind Button <FocusIn> {}
bind Button <Enter> {
tkButtonEnter %W
}
bind Button <Leave> {
tkButtonLeave %W
}
bind Button <1> {
tkButtonDown %W
}
bind Button <ButtonRelease-1> {
tkButtonUp %W
}
bind Checkbutton <FocusIn> {}
bind Checkbutton <Leave> {
tkButtonLeave %W
}
bind Radiobutton <FocusIn> {}
bind Radiobutton <Leave> {
tkButtonLeave %W
}
if {[string match "windows" $tcl_platform(platform)]} {
#########################
# Windows implementation
#########################
# tkButtonEnter --
# The procedure below is invoked when the mouse pointer enters a
# button widget. It records the button we're in and changes the
# state of the button to active unless the button is disabled.
#
# Arguments:
# w - The name of the widget.
proc tkButtonEnter w {
global tkPriv
if {[string compare [$w cget -state] "disabled"] } {
# If the mouse button is down, set the relief to sunken on entry.
# Overwise, if there's an -overrelief value, set the relief to that.
if {[string equal $tkPriv(buttonWindow) $w]} {
$w configure -state active -relief sunken
} elseif { [string compare [$w cget -overrelief] ""] } {
set tkPriv(relief) [$w cget -relief]
$w configure -relief [$w cget -overrelief]
}
}
set tkPriv(window) $w
}
# tkButtonLeave --
# The procedure below is invoked when the mouse pointer leaves a
# button widget. It changes the state of the button back to
# inactive. If we're leaving the button window with a mouse button
# pressed (tkPriv(buttonWindow) == $w), restore the relief of the
# button too.
#
# Arguments:
# w - The name of the widget.
proc tkButtonLeave w {
global tkPriv
if {[string compare [$w cget -state] "disabled"]} {
$w configure -state normal
}
# Restore the original button relief if the mouse button is down
# or there is an -overrelief value.
if {[string equal $tkPriv(buttonWindow) $w] || \
[string compare [$w cget -overrelief] ""] } {
$w configure -relief $tkPriv(relief)
}
set tkPriv(window) ""
}
# tkCheckRadioEnter --
# The procedure below is invoked when the mouse pointer enters a
# checkbutton or radiobutton widget. It records the button we're in
# and changes the state of the button to active unless the button is
# disabled.
#
# Arguments:
# w - The name of the widget.
proc tkCheckRadioEnter w {
global tkPriv
if {[string compare [$w cget -state] "disabled"] \
&& [string equal $tkPriv(buttonWindow) $w]} {
$w configure -state active
if { [string compare [$w cget -overrelief] ""] } {
set tkPriv(relief) [$w cget -relief]
$w configure -relief [$w cget -overrelief]
}
}
set tkPriv(window) $w
}
# tkButtonDown --
# The procedure below is invoked when the mouse button is pressed in
# a button widget. It records the fact that the mouse is in the button,
# saves the button's relief so it can be restored later, and changes
# the relief to sunken.
#
# Arguments:
# w - The name of the widget.
proc tkButtonDown w {
global tkPriv
# Only save the button's relief if it has no -overrelief value. If there
# is an overrelief setting, tkPriv(relief) will already have been set, and
# the current value of the -relief option will be incorrect.
if { [string equal [$w cget -overrelief] ""] } {
set tkPriv(relief) [$w cget -relief]
}
if {[string compare [$w cget -state] "disabled"]} {
set tkPriv(buttonWindow) $w
$w configure -relief sunken -state active
# If this button has a repeatdelay set up, get it going with an after
after cancel $tkPriv(afterId)
set delay [$w cget -repeatdelay]
set tkPriv(repeated) 0
if {$delay > 0} {
set tkPriv(afterId) [after $delay [list tkButtonAutoInvoke $w]]
}
}
}
# tkCheckRadioDown --
# The procedure below is invoked when the mouse button is pressed in
# a button widget. It records the fact that the mouse is in the button,
# saves the button's relief so it can be restored later, and changes
# the relief to sunken.
#
# Arguments:
# w - The name of the widget.
proc tkCheckRadioDown w {
global tkPriv
set tkPriv(relief) [$w cget -relief]
if {[string compare [$w cget -state] "disabled"]} {
set tkPriv(buttonWindow) $w
$w configure -state active
}
}
# tkButtonUp --
# The procedure below is invoked when the mouse button is released
# in a button widget. It restores the button's relief and invokes
# the command as long as the mouse hasn't left the button.
#
# Arguments:
# w - The name of the widget.
proc tkButtonUp w {
global tkPriv
if {[string equal $tkPriv(buttonWindow) $w]} {
set tkPriv(buttonWindow) ""
# Restore the button's relief. If there is no overrelief, the
# button relief goes back to its original value. If there is an
# overrelief, the relief goes to the overrelief (since the cursor is
# still over the button).
set relief [$w cget -overrelief]
if { [string equal $relief ""] } {
set relief $tkPriv(relief)
}
$w configure -relief $relief
# Clean up the after event from the auto-repeater
after cancel $tkPriv(afterId)
if {[string equal $tkPriv(window) $w]
&& [string compare [$w cget -state] "disabled"]} {
$w configure -state normal
# Only invoke the command if it wasn't already invoked by the
# auto-repeater functionality
if { $tkPriv(repeated) == 0 } {
uplevel #0 [list $w invoke]
}
}
}
}
}
if {[string match "unix" $tcl_platform(platform)]} {
#####################
# Unix implementation
#####################
# tkButtonEnter --
# The procedure below is invoked when the mouse pointer enters a
# button widget. It records the button we're in and changes the
# state of the button to active unless the button is disabled.
#
# Arguments:
# w - The name of the widget.
proc tkButtonEnter {w} {
global tkPriv
if {[string compare [$w cget -state] "disabled"]} {
$w configure -state active
# If the mouse button is down, set the relief to sunken on entry.
# Overwise, if there's an -overrelief value, set the relief to that.
if {[string equal $tkPriv(buttonWindow) $w]} {
$w configure -state active -relief sunken
} elseif { [string compare [$w cget -overrelief] ""] } {
set tkPriv(relief) [$w cget -relief]
$w configure -relief [$w cget -overrelief]
}
}
set tkPriv(window) $w
}
# tkButtonLeave --
# The procedure below is invoked when the mouse pointer leaves a
# button widget. It changes the state of the button back to
# inactive. If we're leaving the button window with a mouse button
# pressed (tkPriv(buttonWindow) == $w), restore the relief of the
# button too.
#
# Arguments:
# w - The name of the widget.
proc tkButtonLeave w {
global tkPriv
if {[string compare [$w cget -state] "disabled"]} {
$w configure -state normal
}
# Restore the original button relief if the mouse button is down
# or there is an -overrelief value.
if {[string equal $tkPriv(buttonWindow) $w] || \
[string compare [$w cget -overrelief] ""] } {
$w configure -relief $tkPriv(relief)
}
set tkPriv(window) ""
}
# tkButtonDown --
# The procedure below is invoked when the mouse button is pressed in
# a button widget. It records the fact that the mouse is in the button,
# saves the button's relief so it can be restored later, and changes
# the relief to sunken.
#
# Arguments:
# w - The name of the widget.
proc tkButtonDown w {
global tkPriv
# Only save the button's relief if it has no -overrelief value. If there
# is an overrelief setting, tkPriv(relief) will already have been set, and
# the current value of the -relief option will be incorrect.
if { [string equal [$w cget -overrelief] ""] } {
set tkPriv(relief) [$w cget -relief]
}
if {[string compare [$w cget -state] "disabled"]} {
set tkPriv(buttonWindow) $w
$w configure -relief sunken
# If this button has a repeatdelay set up, get it going with an after
after cancel $tkPriv(afterId)
set delay [$w cget -repeatdelay]
set tkPriv(repeated) 0
if {$delay > 0} {
set tkPriv(afterId) [after $delay [list tkButtonAutoInvoke $w]]
}
}
}
# tkButtonUp --
# The procedure below is invoked when the mouse button is released
# in a button widget. It restores the button's relief and invokes
# the command as long as the mouse hasn't left the button.
#
# Arguments:
# w - The name of the widget.
proc tkButtonUp w {
global tkPriv
if {[string equal $w $tkPriv(buttonWindow)]} {
set tkPriv(buttonWindow) ""
# Restore the button's relief. If there is no overrelief, the
# button relief goes back to its original value. If there is an
# overrelief, the relief goes to the overrelief (since the cursor is
# still over the button).
set relief [$w cget -overrelief]
if { [string equal $relief ""] } {
set relief $tkPriv(relief)
}
$w configure -relief $relief
# Clean up the after event from the auto-repeater
after cancel $tkPriv(afterId)
if {[string equal $w $tkPriv(window)] \
&& [string compare [$w cget -state] "disabled"]} {
# Only invoke the command if it wasn't already invoked by the
# auto-repeater functionality
if { $tkPriv(repeated) == 0 } {
uplevel #0 [list $w invoke]
}
}
}
}
}
if {[string match "macintosh" $tcl_platform(platform)]} {
####################
# Mac implementation
####################
# tkButtonEnter --
# The procedure below is invoked when the mouse pointer enters a
# button widget. It records the button we're in and changes the
# state of the button to active unless the button is disabled.
#
# Arguments:
# w - The name of the widget.
proc tkButtonEnter {w} {
global tkPriv
if {[string compare [$w cget -state] "disabled"]} {
if {[string equal $w $tkPriv(buttonWindow)]} {
$w configure -state active
} elseif { [string compare [$w cget -overrelief] ""] } {
set tkPriv(relief) [$w cget -relief]
$w configure -relief [$w cget -overrelief]
}
}
set tkPriv(window) $w
}
# tkButtonLeave --
# The procedure below is invoked when the mouse pointer leaves a
# button widget. It changes the state of the button back to
# inactive. If we're leaving the button window with a mouse button
# pressed (tkPriv(buttonWindow) == $w), restore the relief of the
# button too.
#
# Arguments:
# w - The name of the widget.
proc tkButtonLeave w {
global tkPriv
if {[string equal $w $tkPriv(buttonWindow)]} {
$w configure -state normal
}
if { [string compare [$w cget -overrelief] ""] } {
$w configure -relief $tkPriv(relief)
}
set tkPriv(window) ""
}
# tkButtonDown --
# The procedure below is invoked when the mouse button is pressed in
# a button widget. It records the fact that the mouse is in the button,
# saves the button's relief so it can be restored later, and changes
# the relief to sunken.
#
# Arguments:
# w - The name of the widget.
proc tkButtonDown w {
global tkPriv
if {[string compare [$w cget -state] "disabled"]} {
set tkPriv(buttonWindow) $w
$w configure -state active
# If this button has a repeatdelay set up, get it going with an after
after cancel $tkPriv(afterId)
if { ![catch {$w cget -repeatdelay} delay] } {
set delay [$w cget -repeatdelay]
set tkPriv(repeated) 0
if {$delay > 0} {
set tkPriv(afterId) [after $delay [list tkButtonAutoInvoke $w]]
}
}
}
}
# tkButtonUp --
# The procedure below is invoked when the mouse button is released
# in a button widget. It restores the button's relief and invokes
# the command as long as the mouse hasn't left the button.
#
# Arguments:
# w - The name of the widget.
proc tkButtonUp w {
global tkPriv
if {[string equal $w $tkPriv(buttonWindow)]} {
$w configure -state normal
set tkPriv(buttonWindow) ""
if { [string compare [$w cget -overrelief] ""] } {
$w configure -relief [$w cget -overrelief]
}
# Clean up the after event from the auto-repeater
after cancel $tkPriv(afterId)
if {[string equal $w $tkPriv(window)]
&& [string compare [$w cget -state] "disabled"]} {
# Only invoke the command if it wasn't already invoked by the
# auto-repeater functionality
if { $tkPriv(repeated) == 0 } {
uplevel #0 [list $w invoke]
}
}
}
}
}
##################
# Shared routines
##################
# tkButtonInvoke --
# The procedure below is called when a button is invoked through
# the keyboard. It simulate a press of the button via the mouse.
#
# Arguments:
# w - The name of the widget.
proc tkButtonInvoke w {
if {[string compare [$w cget -state] "disabled"]} {
set oldRelief [$w cget -relief]
set oldState [$w cget -state]
$w configure -state active -relief sunken
update idletasks
after 100
$w configure -state $oldState -relief $oldRelief
uplevel #0 [list $w invoke]
}
}
# tkButtonAutoInvoke --
#
# Invoke an auto-repeating button, and set it up to continue to repeat.
#
# Arguments:
# w button to invoke.
#
# Results:
# None.
#
# Side effects:
# May create an after event to call tkButtonAutoInvoke.
proc tkButtonAutoInvoke {w} {
global tkPriv
after cancel $tkPriv(afterId)
set delay [$w cget -repeatinterval]
if { [string equal $tkPriv(window) $w] } {
incr tkPriv(repeated)
uplevel #0 [list $w invoke]
}
if {$delay > 0} {
set tkPriv(afterId) [after $delay [list tkButtonAutoInvoke $w]]
}
}
# tkCheckRadioInvoke --
# The procedure below is invoked when the mouse button is pressed in
# a checkbutton or radiobutton widget, or when the widget is invoked
# through the keyboard. It invokes the widget if it
# isn't disabled.
#
# Arguments:
# w - The name of the widget.
# cmd - The subcommand to invoke (one of invoke, select, or deselect).
proc tkCheckRadioInvoke {w {cmd invoke}} {
if {[string compare [$w cget -state] "disabled"]} {
uplevel #0 [list $w $cmd]
}
}
|
