/**
* Set the extrema of the axis
*
* @param Image_Graph_Plot $plot The plot that 'hold' the values
* @access private
*/
function _setExtrema(&$plot)
{
if ($this->_axisX != null && $this->_axisX->_isNumeric()) {
$this->_axisX->_setMinimum($plot->_minimumX());
$this->_axisX->_setMaximum($plot->_maximumX());
}
if ($plot->_axisY == IMAGE_GRAPH_AXIS_Y_SECONDARY && $this->_axisYSecondary !== null && $this->_axisYSecondary->_isNumeric()) {
$this->_axisYSecondary->_setMinimum($plot->_minimumY());
$this->_axisYSecondary->_setMaximum($plot->_maximumY());
} elseif ($this->_axisY != null && $this->_axisY->_isNumeric()) {
$this->_axisY->_setMinimum($plot->_minimumY());
$this->_axisY->_setMaximum($plot->_maximumY());
}
$datasets =& $plot->dataset();
if (!is_array($datasets)) {
$datasets = array($datasets);
}
$keys = array_keys($datasets);
foreach ($keys as $key) {
$dataset =& $datasets[$key];
if ($dataset->count() > 0) {
$this->_hasData = true;
}
if (is_a($dataset, 'Image_Graph_Dataset')) {
if ($this->_axisX != null && !$this->_axisX->_isNumeric()) {
$this->_axisX->_applyDataset($dataset);
}
if ($plot->_axisY == IMAGE_GRAPH_AXIS_Y_SECONDARY && $this->_axisYSecondary !== null && !$this->_axisYSecondary->_isNumeric()) {
$this->_axisYSecondary->_applyDataset($dataset);
} elseif ($this->_axisY != null && !$this->_axisY->_isNumeric()) {
$this->_axisY->_applyDataset($dataset);
}
}
}
unset($keys);
}
/**
* Return the maximum Y point
*
* @return double The maximum Y point
* @access private
*/
function _maximumY()
{
return 1.05 * parent::_maximumY();
}