PagerViewDataSource

Data source interface for PagerView that provides page content and manages view lifecycle.

Implementations of this interface control:

• The total number of pages
• Creation and configuration of page views
• Recycling behavior for efficient memory usage

class MyPagerDataSource implements PagerViewDataSource {
    var pages:Array<PageData>;
    public function pagerViewSize(pagerView:PagerView):Int {
        return pages.length;
    }
    public function pagerViewPageAtIndex(pagerView:PagerView, pageIndex:Int, reusableView:View):View {
        var view = (reusableView != null) ? reusableView : new MyPageView();
        view.configure(pages[pageIndex]);
        return view;
    }
    public function pagerViewReleasePageAtIndex(pagerView:PagerView, pageIndex:Int, view:View):Bool {
        // Clean up and return true to allow reuse
        view.reset();
        return true;
    }
}

Instance Members #

Get the number of elements.

Called when a view is not used anymore at the given index. Lets the dataSource do some cleanup if needed, before this view gets reused (if it can). Returns true if the view can be reused at another index of false otherwise.

This method is called when:

• The page scrolls out of the visible range
• The PagerView is destroyed
• Data is reloaded

Get a view at the given index. If reusableView is provided, it can be recycled as the new item to avoid creating new instances.

Implementation tips:

• Always check if reusableView is non-null before creating a new view
• Configure the view with data for the specified pageIndex
• The returned view will be sized to match the PagerView dimensions