/**
* Predisplay function
*
* @return void
*/
function prepare()
{
$p1 = new GPoint();
$p1->setCoordinates($this->_x1, $this->_y1);
$bsize = (int) ($this->getSize() / 3) + 1;
$p1->setSize($this->getSize() + $bsize);
$p1->setColor($this->_background_r_color, $this->_background_g_color, $this->_background_b_color);
$this->addElement($p1);
$p2 = new GPoint();
$p2->setCoordinates($this->_x1, $this->_y1);
$p2->setSize($this->getSize());
$p2->setColor($this->_r_color, $this->_g_color, $this->_b_color);
$this->addElement($p2);
}
