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lib/Tk/Chart/Areas.pm  view on Meta::CPAN

package Tk::Chart::Areas;

use warnings;
use strict;
use Carp;

#==================================================================
# $Author    : Djibril Ousmanou                                   $
# $Copyright : 2018                                               $
# $Update    : 09/02/2018                                         $
# $AIM       : Create area graph                                  $
#==================================================================

use vars qw($VERSION);
$VERSION = '1.06';

use base qw/ Tk::Derived Tk::Canvas::GradientColor /;
use Tk::Balloon;

use Tk::Chart::Utils qw / :DUMMIES :DISPLAY /;
use Tk::Chart qw / :DUMMIES /;

Construct Tk::Widget 'Areas';

my $POINT = q{.};

sub Populate {

  my ( $cw, $ref_parameters ) = @_;

  # Get initial parameters
  $cw->{RefChart} = _initconfig();

  $cw->SUPER::Populate($ref_parameters);

  $cw->Advertise( 'GradientColor' => $cw );
  $cw->Advertise( 'canvas'        => $cw->SUPER::Canvas );
  $cw->Advertise( 'Canvas'        => $cw->SUPER::Canvas );

  # remove highlightthickness if necessary
  if ( !exists $ref_parameters->{-highlightthickness} ) {
    $cw->configure( -highlightthickness => 0 );
  }

  my $ref_configcommon = _get_configspecs();

  # ConfigSpecs
  $cw->ConfigSpecs(

    # Common options
    %{$ref_configcommon},

    -viewsection => [ 'PASSIVE', 'Viewsection', 'ViewSection', 1 ],
    -outlinearea => [ 'PASSIVE', 'Outlinearea', 'OutlineArea', 'black' ],
  );

  $cw->Delegates( DEFAULT => $cw, );

  # recreate graph after widget resize
  $cw->enabled_automatic_redraw();
  $cw->disabled_gradientcolor();

  return;
}

sub _balloon {
  my ($cw) = @_;

  # balloon defined and user want to stop it
  if ( defined $cw->{RefChart}->{Balloon}{Obj}
    and $cw->{RefChart}->{Balloon}{State} == 0 )
  {
    $cw->_destroyballoon_bind();
    return;
  }

  # balloon not defined and user want to stop it