WxPerlBook / example / 2a_minimal_subset / ruler.pl

use v5.14;
use warnings;

package App;
use Wx qw/ :everything /;
use parent qw(Wx::App);

sub OnInit {
	my $app   = shift;
	my $frame = Wx::Frame->new( undef, -1, 'Ruler');
	my $grid = Wx::FlexGridSizer->new(2, 4, 1, 1 );
	my %txt;
	for my $label (qw(X Y H W)) {
		$txt{ $label } = Wx::TextCtrl->new($frame, -1, $label);
		$grid->Add( Wx::StaticText->new($frame, -1, $label.' :'), 0, &Wx::wxGROW | &Wx::wxALL, 5);
		$grid->Add( $txt{ $label }, 1, &Wx::wxGROW | &Wx::wxALL | wxALIGN_CENTRE_VERTICAL, 0 );

	Wx::Event::EVT_SIZE($frame, sub {
		my $size = $frame->GetSize;
		$txt{ 'H' }->SetValue( $size->GetHeight );
		$txt{ 'W' }->SetValue( $size->GetWidth );
	} );
	Wx::Event::EVT_MOVE($frame, sub {
		my $pos = $frame->GetPosition;
		$txt{ 'X' }->SetValue( $pos->x );
		$txt{ 'Y' }->SetValue( $pos->y );
	} );
	$frame->SetSizer( $grid );

package main;
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