protected function OnPreRender()
{
# Build up child option controls for the select list
$options = array();
# Add blank option if requested
if ($this->b_blank) {
$options[] = new XhtmlOption();
}
# Loop through options, converting group names to option groups
$current_group_name = '';
$current_group = null;
foreach ($this->GetControls() as $option) {
/* @var $option XhtmlOption */
# Same group as last option
if ($option->GetGroupName() === $current_group_name) {
if ($current_group_name) {
# Add option to the group
$current_group->AddControl($option);
} else {
# It's not in a group
$options[] = $option;
}
} else {
# Different group than last option
if (!is_null($current_group)) {
$options[] = $current_group;
}
# If it's another group, create the group
if ($option->GetGroupName()) {
$current_group_name = $option->GetGroupName();
$current_group = new XhtmlElement('optgroup', $option);
$current_group->AddAttribute('label', $current_group_name);
} else {
# If we're now out of a group, clear the current groups
$current_group_name = '';
$current_group = null;
$options[] = $option;
}
}
}
# Add the final group, if there is one
if (!is_null($current_group)) {
$options[] = $current_group;
}
# Move child controls into select list
$this->o_select->SetControls($options);
$no_controls = array();
$this->SetControls($no_controls);
# Add select list to this control
if ($this->GetLabel()) {
if ($this->b_hide_label) {
$o_label = new XhtmlElement('label');
$o_label->SetCssClass('aural');
$o_label->AddAttribute('for', $this->o_select->GetXhtmlId());
$o_label->AddControl($this->GetLabel() . ' ');
$this->AddControl($o_label);
$this->AddControl($this->o_select);
} else {
$o_label = new XhtmlElement('label');
$o_label->AddAttribute('for', $this->o_select->GetXhtmlId());
$o_label->AddControl($this->GetLabel() . ' ');
$o_label->AddControl($this->o_select);
$this->AddControl($o_label);
}
} else {
$this->AddControl($this->o_select);
}
parent::OnPreRender();
}
