# ExpandableBottomAppBar [![pub package](https://img.shields.io/pub/v/expandable_bottom_bar)](https://pub.dev/packages/expandable_bottom_bar) Animatable bottom app bar with expandable sheet ## Preview ![preview](https://github.com/rIIh/expandable-bottom-bar/raw/master/media/showcase.gif) ## Getting Started Add the plugin: ```yaml dependencies: ... expandable_bottom_bar: any ``` ## Basic Usage Adding the widget ```dart bottomNavigationBar: BottomExpandableAppBar( // Provide the bar controller in build method or default controller as ancestor in a tree controller: bbc, expandedHeight: expandedHeight.value, horizontalMargin: 16, expandedBackColor: Theme.of(context).backgroundColor, // Your bottom sheet code here expandedBody: Center( child: Text("Hello world!"), ), // Your bottom app bar code here bottomAppBarBody: Padding( padding: const EdgeInsets.all(8.0), child: Row( mainAxisSize: MainAxisSize.max, children: [ Expanded( child: Text( "Hello", textAlign: TextAlign.center, ), ), Spacer( flex: 2, ), Expanded( child: Text( "World", textAlign: TextAlign.center, ), ), ], ), ), ) ``` ## Customization (Optional) ### BottomExpandableAppBar **horizontalMargin** - distance of sheet's sides from edge
**bottomOffset** - distance of top sheet's edge from top appbar's edge in closed state
**shape** - notch shape for FAB
**appBarHeight** - if you need change app bar height
**bottomAppBarColor** - background color of appbar container
or **appBarDecoration** - decoration of appbar container
**expandedBackColor** - background color of sheet container
or **expandedDecoration** - decoration of sheet container
## Controls ### BottomAppBarController #### Settings **snap** - if true sheet will snap to opened and closed state
**dragLength** - distance that pointer should travel for fully open/close the sheet
#### Callbacks *Should have dragLength defined*
**onDrag** - use that with GestureDetector for swipe control
**onDragEnd** - use that with GestureDetector for swipe control
**open** - switch the sheet to closed state
**close** - switch the sheet to opened state
**swap** - if sheet is opened closes the sheet and vice versa

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