Expandable bottom app bar widget for Flutter SDK

expandablebottomappbar

animatable bottom app bar with expandable sheet.

getting started

add the plugin:

dependencies:
  ...
  expandable_bottom_bar: any

basic usage

adding the widget

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: <widget>[
              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