void _ensureHistoryEntry()
{
if (this._historyEntry == null)
{
ModalRoute route = ModalRoute.of(this.context);
if (route != null)
{
this._historyEntry = new LocalHistoryEntry(onRemove: this._handleHistoryEntryRemoved);
route.addLocalHistoryEntry(this._historyEntry);
FocusScope.of(this.context).setFirstFocus(this._focusScopeNode);
}
}
}
void _animationStatusChanged(AnimationStatus status)
{
switch (status)
{
case AnimationStatus.forward:
this._ensureHistoryEntry();
break;
case AnimationStatus.reverse:
this._historyEntry?.remove();
this._historyEntry = null;
break;
case AnimationStatus.dismissed:
break;
case AnimationStatus.completed:
break;
}
}
void _handleHistoryEntryRemoved()
{
this._historyEntry = null;
this.close();
}
void _handleHistoryEntryRemoved()
{
_historyEntry = null;
close();
}
