libxmltv-perl 0.5.63-2 / usr / share / perl5 / XMLTV / Ask / Tk.pm

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# A few GUI routines for asking the user questions using the Tk library.

package XMLTV::Ask::Tk;
use strict;

# Use Log::TraceMessages if installed.
BEGIN {
    eval { require Log::TraceMessages };
    if ($@) {
	*t = sub {};
	*d = sub { '' };
    }
    else {
	*t = \&Log::TraceMessages::t;
	*d = \&Log::TraceMessages::d;
    }
}

use Tk;

my $main_window;
my $top_frame;
my $middle_frame; 
my $bottom_frame;
my $mid_bottom_frame;

# Ask a question with a free text answer.
# Parameters:
#   current module
#   question text
#   what character to show instead of the one typed
# Returns the text entered by the user.
sub ask( $$$ ) {
        shift;
        my $question = shift;
        my $show = shift;

        my $textbox;
        
        $main_window = MainWindow->new;
        
        $main_window->title("Question");
        $main_window->minsize(qw(400 250));
        $main_window->geometry('+250+150');

        $top_frame    = $main_window->Frame()->pack;
        $middle_frame = $main_window->Frame()->pack;
        $bottom_frame = $main_window->Frame()->pack(-side => 'bottom');
	
        $top_frame->Label(-height => 2)->pack;
	
        $top_frame->Label(-text => $question)->pack;

        my $ans;
        
        $bottom_frame->Button(-text    => "OK",
			  -command => sub {$ans = $textbox->get(); $main_window->destroy;},
			  -width    => 10
			 )->pack(-padx => 2, -pady => 4);
        
        if (defined $show) {
            $textbox = $middle_frame->Entry(-show => $show)->pack();
        }
        else {
            $textbox = $middle_frame->Entry()->pack();
        }
        MainLoop();
	
        return $ans;
}

# Ask a question with a password answer.
# Parameters:
#   current module
#   question text
# Returns the text entered by the user.
sub ask_password( $$ ) { ask($_[0], $_[1], "*") }


# Ask a question where the answer is one of a set of alternatives.
#
# Parameters:
#   current module
#   question text
#   default choice
#   Remaining arguments are the choices available.
#
# Returns one of the choices, or undef if input could not be read.
#
sub ask_choice( $$$@ ) {
        shift;
        my $question = shift; die if not defined $question;
        my $default = shift; die if not defined $default;
        my @options = @_; die if not @options;
        t "asking question $question, default $default";
        warn "default $default not in options"
        if not grep { $_ eq $default } @options;
        return _ask_choices( $question, $default, 0, @options );
}

# Ask a yes/no question.
#
# Parameters:
#   current module
#   question text
#   default (true or false)
#
# Returns true or false, or undef if input could not be read.
#
sub ask_boolean( $$$ ) {
        shift;
        my ($text, $default) = @_;	
        t "asking question $text, default $default";
	
        $main_window = MainWindow->new;

        $main_window->title('Question');
        $main_window->minsize(qw(400 250));
        $main_window->geometry('+250+150');

        $top_frame    = $main_window->Frame()->pack;
        $middle_frame = $main_window->Frame()->pack;
        $bottom_frame = $main_window->Frame()->pack(-side => 'bottom');
	
        $top_frame->Label(-height => 2)->pack;
        $top_frame->Label(-text => $text)->pack;
	
        my $ans = 0;
  
        $bottom_frame->Button(-text    => "Yes",
			  -command => sub { $ans = 1; $main_window->destroy; },
			  -width => 10,
			 )->pack(-side => 'left', -padx => 2, -pady => 4);
	
        $bottom_frame->Button(-text    => "No",
			  -command => sub { $ans = 0; $main_window->destroy; },
			  -width => 10
			 )->pack(-side => 'left', -padx => 2, -pady => 4);
	
        MainLoop();

        return $ans;
}

# Ask yes/no questions with option 'default to all'.
#
# Parameters:
#   current module
#   default (true or false),
#   question texts (one per question).
#
# Returns: lots of booleans, one for each question.  If input cannot
# be read, then a partial list is returned.
#
sub ask_many_boolean( $$@ ) {
        shift;
        my $default=shift;
        my @options = @_;
        return _ask_choices('', $default, 1, @options);
}

# A helper routine used to create the listbox for both
# ask_choice and ask_many_boolean
sub _ask_choices( $$$@ ) {
        my $question=shift;
        my $default=shift;
        my $allowedMany=shift;
        my @options = @_;

        return if not @options;
	
        my $select_all_button;
        my $select_none_button;

        my $listbox;
        my $i;
	
        $main_window = MainWindow->new;

        $main_window->title('Question');
        $main_window->minsize(qw( 400 250 ));
        $main_window->geometry('+250+150');

        $top_frame    = $main_window->Frame()->pack;
        $middle_frame = $main_window->Frame()->pack(-fill => 'both');
	
        $top_frame->Label(-height => 2)->pack;

        $top_frame->Label(-text => $question)->pack;

        $listbox = $middle_frame->ScrlListbox();

        $listbox->insert(0, @options);
	
        if ($allowedMany) {
                $listbox->configure( -selectmode => 'multiple' );
		
                if ($default) {
                        $listbox->selectionSet( 0, 'end' );
                }
		
                $mid_bottom_frame = $main_window->Frame()->pack();
	
	        $select_all_button = $mid_bottom_frame->Button
                        (-text => 'Select All',
                        -command => sub { $listbox->selectionSet(0, 1000) },
                        -width => 10,
                        )->pack(-side => 'left');
	
	        $select_none_button = $mid_bottom_frame->Button
                        (-text => 'Select None',
                        -command => sub { $listbox->selectionClear(0, 1000) },
                        -width => 10,
                        )-> pack(-side => 'right');
        }
        else {
                $listbox->configure(-selectmode => 'single');
                $listbox->selectionSet(_index_array($default, @options));
        }
	
        $listbox->pack(-fill => 'x', -padx => '5', -pady => '2');
	
        $bottom_frame = $main_window->Frame()->pack(-side => 'bottom');
	
        my @cursel;
  
        $bottom_frame->Button(-text    => 'OK',
			  -command => sub { @cursel = $listbox->curselection; $main_window->destroy; },
			  -width    => 10,
			 )->pack(-padx => 2, -pady => 4);
        
        MainLoop();

        if ($allowedMany) {
                my @choices;
                my @choice_numbers = @cursel;

                $i=0;
                foreach (@options) {
                        push @choices, 0;
                        foreach( @choice_numbers ) {
                                if ($options[$_] eq $options[$i]) {
                                        $choices[$i] = 1;
                                }
                        }
                        $i++;
                }

                return @choices;	
        }
        else {
                my $ans = $options[$cursel[0]];
	              return $ans;
        }
}

# Give some information to the user
# Parameters:
#   current module
#   text to show to the user
sub say( $$ ) {
        shift;
        my $question = shift;
	
        $main_window = MainWindow->new;

        $main_window->title("Information");
        $main_window->minsize(qw(400 250));
        $main_window->geometry('+250+150');

        $top_frame    = $main_window->Frame()->pack;
        $middle_frame = $main_window->Frame()->pack;
        $bottom_frame = $main_window->Frame()->pack(-side => 'bottom');
	
        $top_frame->Label(-height => 2)->pack;
        $top_frame->Label(-text => $question)->pack;
	
        $bottom_frame->Button(-text    => "OK",
			  -command => sub { $main_window->destroy; },
			  -width    => 10,
			 )->pack(-padx => 2, -pady => 4);
	
        MainLoop();
}

# A hekper routine that returns the index in an array
# of the supplied argument
# Parameters:
#     the item to find
#     the array to find it in
# Returns the index of the item in the array, or -1 if not found
sub _index_array($@)
{
        my $s=shift;
        my @array = @_;
	
        for (my $i = 0; $i < $#array; $i++) {
                return $i if $array[$i] eq $s;
        }
	
        return -1;
}

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