$digits = $item['value_type'] == ITEM_VALUE_TYPE_FLOAT ? 2 : 0;
if (isset($lastHistory['value']) && isset($prevHistory['value']) && ($item['value_type'] == ITEM_VALUE_TYPE_FLOAT || $item['value_type'] == ITEM_VALUE_TYPE_UINT64) && bcsub($lastHistory['value'], $prevHistory['value'], $digits) != 0) {
$change = '';
if ($lastHistory['value'] - $prevHistory['value'] > 0) {
$change = '+';
}
// for 'unixtime' change should be calculated as uptime
$change .= convert_units(array('value' => bcsub($lastHistory['value'], $prevHistory['value'], $digits), 'units' => $item['units'] == 'unixtime' ? 'uptime' : $item['units']));
$change = nbsp($change);
} else {
$change = UNKNOWN_VALUE;
}
// column "action"
$showLink = ($config['hk_history_global'] && $config['hk_history'] == 0 || $item['history'] == 0) && ($config['hk_trends_global'] && $config['hk_trends'] == 0 || $item['trends'] == 0);
$checkbox = new CCheckBox('itemids[' . $item['itemid'] . ']', null, null, $item['itemid']);
$checkbox->removeAttribute('id');
if ($item['value_type'] == ITEM_VALUE_TYPE_FLOAT || $item['value_type'] == ITEM_VALUE_TYPE_UINT64) {
$actions = $showLink ? UNKNOWN_VALUE : new CLink(_('Graph'), 'history.php?action=' . HISTORY_GRAPH . '&itemids[]=' . $item['itemid']);
} else {
$actions = $showLink ? UNKNOWN_VALUE : new CLink(_('History'), 'history.php?action=' . HISTORY_VALUES . '&itemids[]=' . $item['itemid']);
$checkbox->setEnabled(false);
}
$stateCss = $item['state'] == ITEM_STATE_NOTSUPPORTED ? 'unknown' : '';
$host = $hosts[$item['hostid']];
if ($filter['showDetails']) {
// item key
$itemKey = $item['type'] == ITEM_TYPE_HTTPTEST || $item['flags'] == ZBX_FLAG_DISCOVERY_CREATED ? new CSpan($item['key_expanded'], 'enabled') : new CLink($item['key_expanded'], 'items.php?form=update&itemid=' . $item['itemid'], 'enabled');
// info
if ($item['status'] == ITEM_STATUS_ACTIVE && $item['error'] !== '') {
$info = new CDiv(null, 'status_icon iconerror');
$info->setHint($item['error'], 'on');
