named_page_view 1.0.0

Simple dependency that enable Page views to be controlled by enums, simplifying the understanding and readability of the code.

named_page_view

Usage

Simple Flutter library that create a different implementation to the PageView, and PageController. With this implementations, is possible to create page views and control them using enums, where each enum variable refers to a page.

First, we define an Enum to use as the pages.

enum Pagez { 
    page1, 
    page2, 
    page3 
}

The definition must be in the same order as it will be used later on the NamedPageView. After, we define an NamedPageController:

  final controller = NamedPageController<Pagez>(
    initialPage: Pagez.page1,
    viewportFraction: 1.0,
  );

We can pass the viewPortFraction, and the initialPage to the controller. Notice that the initialPage receives an instance of the enum that represents the pages. The usage of the NamedPageView is given as the following:

NamedPageView<Pagez>(
        controller: controller,
        onPageChanged: (page) {
          print('PAGE $page');
        },
        pages: const {
          Pagez.page1: TestPage(label: '1', color: Colors.red),
          Pagez.page2: TestPage(label: '2', color: Colors.blue),
          Pagez.page3: TestPage(label: '3', color: Colors.green),
        },
      ),

We pass the NamedPageController as a parameter to the NamedPageView. The pages parameter receives a Map<Enum, Widget>, and is where you define wich enum page represents each widget page. The onPageChanged parameter receives a void Function(Enum page), and is called every time the page changes.