/usr/lib/perl5/Tk/Button.pm is in perl-tk 1:804.029-1.1ubuntu2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 | package Tk::Button;
# Conversion from Tk4.0 button.tcl competed.
#
# Copyright (c) 1992-1994 The Regents of the University of California.
# Copyright (c) 1994 Sun Microsystems, Inc.
# Copyright (c) 1995-2003 Nick Ing-Simmons. All rights reserved.
# This program is free software; you can redistribute it and/or
use vars qw($VERSION);
$VERSION = '4.010'; # $Id: //depot/Tkutf8/Tk/Button.pm#8 $
# modify it under the same terms as Perl itself, subject
# to additional disclaimer in license.terms due to partial
# derivation from Tk4.0 sources.
use strict;
require Tk::Widget;
use base qw(Tk::Widget);
use vars qw($buttonWindow $afterId $repeated);
Tk::Methods('deselect','flash','invoke','select','toggle');
sub Tk_cmd { \&Tk::button }
Construct Tk::Widget 'Button';
sub ClassInit
{
my ($class,$mw) = @_;
$mw->bind($class,'<Enter>', 'Enter');
$mw->bind($class,'<Leave>', 'Leave');
$mw->bind($class,'<1>', 'butDown');
$mw->bind($class,'<ButtonRelease-1>', 'butUp');
$mw->bind($class,'<space>', 'Invoke');
$mw->bind($class,'<Return>', 'Invoke');
return $class;
}
# 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.
sub Enter
{
my $w = shift;
my $E = shift;
if ($w->cget('-state') ne 'disabled')
{
# On unix the state is active just with mouse-over
$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.
$w->{__relief__} = $w->cget('-relief');
if (defined $buttonWindow && $w == $buttonWindow)
{
$w->configure(-relief => 'sunken');
$w->{__prelief__} = 'sunken';
}
elsif ((my $over = $w->cget('-overrelief')) ne '')
{
$w->configure(-relief => $over);
$w->{__prelief__} = $over;
}
}
$Tk::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.
sub Leave
{
my $w = shift;
$w->configure('-state'=>'normal') if ($w->cget('-state') ne 'disabled');
# Restore the original button relief if it was changed by Tk.
# That is signaled by the existence of Priv($w,prelief).
if (exists $w->{__relief__})
{
if (exists $w->{__prelief__} &&
$w->{__prelief__} eq $w->cget('-relief'))
{
$w->configure(-relief => $w->{__relief__});
}
delete $w->{__relief__};
delete $w->{__prelief__};
}
undef $Tk::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.
sub butDown
{
my $w = shift;
# Only save the button's relief if it does not yet exist. If there
# is an overrelief setting, Priv($w,relief) will already have been set,
# and the current value of the -relief option will be incorrect.
if (!exists $w->{__relief__})
{
$w->{__relief__} = $w->cget('-relief');
}
if ($w->cget('-state') ne 'disabled')
{
$buttonWindow = $w;
$w->configure('-relief' => 'sunken', '-state' => 'active');
$w->{__prelief__} = 'sunken';
# If this button has a repeatdelay set up, get it going with an after
$w->afterCancel($afterId);
my $delay = $w->cget('-repeatdelay');
$repeated = 0;
if ($delay > 0)
{
$afterId = $w->after($delay, [$w, 'AutoInvoke']);
}
}
}
# 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.
sub butUp
{
my $w = shift;
if (defined($buttonWindow) && $buttonWindow == $w)
{
undef $buttonWindow;
# Restore the button's relief if it was cached.
if (exists $w->{__relief__})
{
if (exists $w->{__prelief__} &&
$w->{__prelief__} eq $w->cget('-relief'))
{
$w->configure(-relief => $w->{__relief__});
}
delete $w->{__relief__};
delete $w->{__prelief__};
}
# Clean up the after event from the auto-repeater
$w->afterCancel($afterId);
if ($w->IS($Tk::window) && $w->cget('-state') ne 'disabled')
{
$w->configure(-state => 'normal');
# Only invoke the command if it wasn't already invoked by the
# auto-repeater functionality
if ($repeated == 0)
{
$w->invoke;
}
}
}
}
# 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.
sub Invoke
{
my $w = shift;
if ($w->cget('-state') ne 'disabled')
{
my $oldRelief = $w->cget('-relief');
my $oldState = $w->cget('-state');
$w->configure('-state' => 'active', '-relief' => 'sunken');
$w->idletasks;
$w->after(100);
$w->configure('-state' => $oldState, '-relief' => $oldRelief);
$w->invoke;
}
}
# ::tk::ButtonAutoInvoke --
#
# 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 ::tk::ButtonAutoInvoke.
sub AutoInvoke
{
my $w = shift;
$w->afterCancel($afterId);
my $delay = $w->cget('-repeatinterval');
if ($w->IS($Tk::window))
{
$repeated++;
$w->invoke;
}
if ($delay > 0)
{
$afterId = $w->after($delay, [$w, 'AutoInvoke']);
}
}
# Used for Tk::Widget::AmpWidget
sub AmpWidgetPostHook
{
my $w = shift;
$w->bind('<<AltUnderlined>>' => ['invoke']);
}
1;
__END__
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