/**
* Adds an element to the objects element list, the new Image_Graph_elements parent is automatically set
* @param Image_Graph_Common $element The new Image_Graph_element
* @return Image_Graph_Common The new Image_Graph_element
*/
function &add(& $element)
{
$this->_debug("Adding element \"".$element->_identification());
$this->_elements[] = &$element;
$element->_setParent($this);
return $element;
}
/**
* Sets the parent. The parent chain should ultimately be a GraPHP object
* @see Image_Graph_Common
* @param Image_Graph_Common Parent The parent
* @access private
*/
function _setParent(& $parent)
{
parent::_setParent($parent);
if ((!$this->_alpha) or (!$GLOBALS['_Image_Graph_gd2'])) {
$this->_index = ImageColorAllocate($this->_canvas(), $this->_red, $this->_green, $this->_blue);
} else {
$this->_index = ImageColorResolveAlpha($this->_canvas(), $this->_red, $this->_green, $this->_blue, $this->_alpha);
}
}
