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package Tk::TipEntry;
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18136
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use 5.008008;
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use strict;
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use warnings;
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use Tk;
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use Tk::Entry;
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our $VERSION = '0.06';
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use base qw(Tk::Derived Tk::Entry);
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Construct Tk::Widget 'TipEntry';
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=head1 NAME
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Tk::TipEntry - An entry with tooltip in the entry if it's empty
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=head1 SYNOPSIS
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use strict;
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use Tk::TipEntry;
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my $entry = $parent->FilterEntry(
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-tip => 'Search...', # will be the default hint text when entry is empty
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);
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$entry->pack();
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=head1 DESCRIPTION
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This widget is derived from L. It implements an other kind of
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tooltip, that is displayed inside the entry when it's empty.
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The tooltip will be removed, if the entry gets the focus and reinserted, if
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the entry loses the focus and it's value is empty (C<$entry-Eget() eq ''>).
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In addition, the entry evaluates the escape key. If the entry has the focus
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and the escape key is pressed, the original input will be restored. If there
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is no previous input, the tooltip will be displayed again.
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=head1 OPTIONS
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Any option exept the C<-tip> will be passed to the construktor of the
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L. The -text option is altered minimally.
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=head2 -tip
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(new option)
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Specify the tooltip, that will be displayed.
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The default value is 'Search...'.
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=head2 -text
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(altered option)
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If there is no C<-text> attribute for the Entry, the tooltip will be set initially
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as default text. Specify C<-text> if you want another initial input.
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The default value is the same as for -tip.
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64
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=head1 METHODS
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66
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=cut
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68
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# ClassInit( $class, $mw )
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#
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# Bind FocusIn, FocusOut and Escape to events.
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72
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sub ClassInit {
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my ($class, $mw) = @_;
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$class->SUPER::ClassInit($mw);
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$mw->bind($class, '' => \&FocusIn);
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$mw->bind($class, '' => \&FocusOut);
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$mw->bind($class, '' => \&Escape);
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} # /ClassInit
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# Populate( %args )
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#
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# Sets default for -tip, unless specified. Set -text initially to -tip,
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# if there is -tip, but no -text.
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sub Populate {
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my ($self, $args) = @_;
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# -- check for undef tip value
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my $default_tip = 'Search...';
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if( !exists($args->{-tip}) or ( exists($args->{-tip}) and !defined($args->{-tip})) ) {
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$args->{-tip} = $default_tip;
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}
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unless( exists $args->{-text} ) {
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$args->{-text} = $args->{-tip};
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}
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$self->SUPER::Populate($args);
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$self->ConfigSpecs(
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-tip => ['PASSIVE', 'tip', 'Tip', $default_tip],
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-previous => ['PASSIVE', 'previous', undef, undef],
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);
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} # /Populate
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=head2 FocusIn()
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When the entry gets the focus, the tooltip will be removed.
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=cut
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120
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sub FocusIn {
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my $self = shift;
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my $default_text = $self->cget('-tip');
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if( $self->get() eq $default_text ) {
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$self->delete(0, 'end');
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$self->configure(-previous => undef);
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}else{
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$self->configure(-previous => $self->get());
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}
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return 1;
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} # /FocusIn
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=head2 FocusOut()
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When the entry loses the focus and if it's empty, the tooltip will be inserted.
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=cut
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144
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sub FocusOut {
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my $self = shift;
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my $default_text = $self->cget('-tip');
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if( $self->get() eq '' ) {
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$self->insert(0, $default_text);
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$self->configure(-previous => undef);
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}elsif( $self->get() eq $default_text ) {
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$self->configure(-previous => undef);
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}else{
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$self->configure(-previous => $self->get());
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}
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return 1;
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} # /FocusOut
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=head2 Escape()
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166
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If the escape key is pressed, the current input will be discarded. The
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previous input will be inserted. If there is no previous input, the -tip will
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be the new input.
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170
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=cut
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sub Escape {
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my $self = shift;
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my $default_text = $self->cget('-tip');
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my $previous_input = $self->cget('-previous');
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if( defined($previous_input) and $self->get() ne $previous_input ) {
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$self->delete(0, 'end');
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$self->insert(0, $previous_input);
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}
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183
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$self->parent->focus();
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185
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return 1;
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} # /Escape
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190
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191
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=head1 SEE ALSO
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192
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193
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L, L, L
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195
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=head1 CREDITS
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197
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POD for C partially taken from L.
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199
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=head1 LICENSE
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201
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This library is free software; you can redistribute it and/or modify it under
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the same terms as Perl itself, either Perl version 5.12.2 or, at your option,
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any later version of Perl 5 you may have available.
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204
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205
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=head1 AUTHOR
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206
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207
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This module was designed after L.
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209
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Alexander Becker, L
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211
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=cut
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213
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1; # /Tk::TipEntry |