show method
void
show()
Implementation
void show() {
if (transitioning || element.classes.contains('in'))
return;
final e = QueryEvent('show.bs.collapse');
$element.triggerEvent(e);
if (e.defaultPrevented)
return;
final $parent = _$parent;
if ($parent != null) {
final panels = $parent.children('.panel');
if (panels.isNotEmpty) {
for (final panel in panels) {
for (final elem in $(panel).children('.in, .collapsing')) {
final active = $(elem).data.get(_name) as Collapse?;
if (active?.transitioning ?? false)
return;
Collapse.wire(elem)!.hide();
$(elem).data.set(_name, null);
}
}
}
}
element.classes
..remove('collapse')
..add('collapsing');
_size = '0';
_transitioning = true;
final complete = (QueryEvent? e) {
element.classes
..remove('collapsing')
..add('in');
_size = 'auto';
_transitioning = false;
$element.trigger('shown.bs.collapse');
};
if (!Transition.isUsed) {
complete(null);
} else {
$element.one(Transition.end, complete);
_size = '${horizontal ? element.scrollWidth : element.scrollHeight}px';
}
}