/**
* Overridden to prevent drawing behind higher bars
* $offset_y should be true for inner bars
*/
protected function BarLabel($value, &$bar, $offset_y = null)
{
$font_size = $this->bar_label_font_size;
$space = $this->bar_label_space;
if ($offset_y) {
// bar too small, would be above
if ($bar['height'] < $font_size + 2 * $space) {
return parent::BarLabel($value, $bar, ($bar['height'] + $font_size) / 2);
}
// option set to above
if ($this->bar_label_position == 'above') {
$this->bar_label_position = 'top';
$label = parent::BarLabel($value, $bar);
$this->bar_label_position = 'above';
return $label;
}
}
return parent::BarLabel($value, $bar);
}
/**
* Override AdjustAxes to change depth
*/
protected function AdjustAxes(&$x_len, &$y_len)
{
/**
* The depth is roughly 1/$num - but it must also take into account the
* bar and group spacing, which is where things get messy
*/
$ends = $this->GetAxisEnds();
$num = $ends['k_max'][0] - $ends['k_min'][0] + 1;
$block = $x_len / $num;
$group = count($this->values);
$a = $this->bar_space;
$b = $this->group_space;
$c = ($block - $a - ($group - 1) * $b) / $group;
$d = ($a + $c) / $block;
$this->depth = $d;
return parent::AdjustAxes($x_len, $y_len);
}
/**
* construct multigraph
*/
public function Values($values)
{
parent::Values($values);
if (!$this->values->error) {
$this->multi_graph = new MultiGraph($this->values, $this->force_assoc, $this->require_integer_keys);
}
}