coordinator_layout

Package Overview

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The coordinator_layout package provides a set of widgets and layouts designed to manage collapsing header behavior in Flutter applications. Inspired by Android's CoordinatorLayout, it enables smooth, coordinated scrolling interactions between headers and underlying content. This library is ideal for creating dynamic, responsive UIs where headers collapse or reveal content as users scroll. It supports multiple platforms including mobile, web, and desktop, making it versatile for cross-platform development. The package integrates seamlessly with existing Flutter widgets to deliver native-like scrolling experiences.

Use cases

Implementing collapsible app bars
Creating dynamic scrollable interfaces
Building responsive header layouts
Enhancing user experience with smooth scrolling
Designing complex scroll behaviors

Key features

Collapsing header animations
Cross-platform compatibility
Integration with ScrollController
Support for nested scrolling
Customizable layout behavior

Suitable for

Developers building material design apps
UI designers seeking advanced scroll effects
Apps requiring dynamic header interactions
Cross-platform Flutter projects
Complex scrolling UI patterns

Considerations

Requires understanding of scroll controllers
May increase complexity for simple layouts
Best suited for advanced UI designs
Performance depends on widget nesting
Limited documentation compared to core Flutter widgets

Original README

Original README snapshot from the linked source repository. Visit the repository for the latest content.

a Library contains widget/layout to handle collapsing header behavior

Example

CoordinatorLayout(
    headerMaxHeight: 200,
    headerMinHeight: kToolbarHeight + MediaQuery.of(context).padding.top,
    headers: [
        SliverCollapsingHeader(
            builder: (context, offset, diff) {
                return ...;
            },
        ),
    ],
    body: Container(height: null, child: buildBody(context)),
),

Fit content

CoordinatorLayout(
    headerMaxHeight: 200,
    headerMinHeight: kToolbarHeight + MediaQuery.of(context).padding.top,
    header:[ 
        Builder(builder: (context) {
            return SliverOverlapAbsorber(
            handle: NestedScrollView.sliverOverlapAbsorberHandleFor(context),
            sliver: SliverSafeArea(
                top: false,
                sliver: SliverCollapsingHeader(
                builder: (context, offset, diff) {
                    return ...;
                },
                ),
            ),
            );
        }),
    ],
    body: Container(height: null, child: buildBody(context)),
),

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