/**
* Calculates the bar width, gap to first bar, gap between bars
* returns an array containing all three
*/
static function BarPosition($bar_width, $bar_width_min, $unit_width, $group_size, $bar_space, $group_space)
{
if (is_numeric($bar_width) && $bar_width >= 1) {
return GroupedBarGraph::BarPositionFixed($bar_width, $unit_width, $group_size, $group_space);
} else {
// bar width dependent on space
$gap_count = $group_size - 1;
$gap = $gap_count > 0 ? $group_space : 0;
$bar_width = $bar_space >= $unit_width ? '1' : $unit_width - $bar_space;
if ($gap_count > 0 && $gap * $gap_count > $bar_width - $group_size) {
$gap = ($bar_width - $group_size) / $gap_count;
}
$bar_width = ($bar_width - $gap * ($group_size - 1)) / $group_size;
if ($bar_width < $bar_width_min) {
return GroupedBarGraph::BarPositionFixed($bar_width_min, $unit_width, $group_size, $group_space);
}
$spacing = $bar_width + $gap;
$offset = $bar_space / 2;
}
return array($bar_width, $offset, $spacing);
}
