<?php

error_reporting(E_ALL);

# author Marc Quinton ; licence LGPL.
# 
# this code is inspired from kksoo site:  http://www.kksou.com/php-gtk2/articles/create-a-round-button---Part-1.php
# this one is fully object oriented and easy to override
#

class RoundButton extends GtkEventBox{

	protected $image;

	protected $pixbuf;
	protected $pixmap;
	protected $mask;

	public function __construct($image, $visible=false){
		parent::__construct();

		$this->image = $image;
		$this->pixbuf = GdkPixbuf::new_from_file($image);
		list($this->pixmap, $this->mask) = $this->pixbuf->render_pixmap_and_mask(255);

		$style = $this->get_style();
		$style = $style->copy();
		$style->bg_pixmap[Gtk::STATE_NORMAL] = $this->pixmap;
		$this->set_style($style);

		$x = $y = 0;  # should take care of $this->allocation and $image size.
		$this->shape_combine_mask($this->mask, $x, $y);
		$this->connect('button-press-event', array($this, 'on_button_press'));
		$this->set_visible_window($visible);

		$this->show_all();
	}

	public function on_button_press(){
		echo "button_press\n";
	}
}

# you can use popup window and make button fully transparent ; but there is some trick to correct.
# this will give you a fully rounded window without any decoration.
# $window = new GtkWindow(Gtk::WINDOW_POPUP);
$window = new GtkWindow();
$window->set_size_request(90,90);
$window->set_position(Gtk::WIN_POS_CENTER);
$window->connect_simple('destroy', array('Gtk','main_quit'));

$window->add( $b = new RoundButton('button_play1.png'));
$window->show_all();

Gtk::main();

?>