createState method

@override SideMenuState createState()

Creates the mutable state for this widget at a given location in the tree.

Subclasses should override this method to return a newly created instance of their associated State subclass:

@override
State<SomeWidget> createState() => _SomeWidgetState();

The framework can call this method multiple times over the lifetime of a StatefulWidget. For example, if the widget is inserted into the tree in multiple locations, the framework will create a separate State object for each location. Similarly, if the widget is removed from the tree and later inserted into the tree again, the framework will call createState again to create a fresh State object, simplifying the lifecycle of State objects.

Implementation

@override
SideMenuState createState() {
  if (type == SideMenuType.shrikNRotate)
    return ShrinkSlideRotateSideMenuState();
  if (type == SideMenuType.shrinkNSlide) return ShrinkSlideSideMenuState();
  if (type == SideMenuType.slideNRotate) return SlideRotateSideMenuState();
  if (type == SideMenuType.slide) return SlideSideMenuState();
  return SlideSideMenuState();
}