public override Widget build(BuildContext context)
{
BottomAppBarTheme babTheme = BottomAppBarTheme.of(context);
NotchedShape notchedShape = widget.shape ?? babTheme?.shape;
CustomClipper <Path> clipper = notchedShape != null
? (CustomClipper <Path>) new _BottomAppBarClipper(
geometry: geometryListenable,
shape: notchedShape,
notchMargin: widget.notchMargin
)
: new ShapeBorderClipper(shape: new RoundedRectangleBorder());
float elevation = widget.elevation ?? babTheme?.elevation ?? _defaultElevation;
Color color = widget.color ?? babTheme?.color ?? Theme.of(context).bottomAppBarColor;
Color effectiveColor = ElevationOverlay.applyOverlay(context, color, elevation);
return(new PhysicalShape(
clipper: clipper,
elevation: elevation,
color: effectiveColor,
clipBehavior: widget.clipBehavior,
child: new Material(
type: MaterialType.transparency,
child: widget.child == null
? null
: new SafeArea(child: widget.child)
)
));
}
public _DemoBottomAppBar(
Color color = null,
FloatingActionButtonLocation fabLocation = null,
NotchedShape shape = null
)
{
this.color = color;
this.fabLocation = fabLocation;
this.shape = shape;
}
public BottomAppBarTheme(
Color color = null,
float?elevation = null,
NotchedShape shape = null
)
{
this.color = color;
this.elevation = elevation;
this.shape = shape;
}
BottomAppBarTheme copyWith(
Color color = null,
float?elevation = null,
NotchedShape shape = null
)
{
return(new BottomAppBarTheme(
color: color ?? this.color,
elevation: elevation ?? this.elevation,
shape: shape ?? this.shape
));
}
public _BottomAppBarClipper(
ValueListenable <ScaffoldGeometry> geometry,
NotchedShape shape,
float notchMargin
) : base(reclip: geometry)
{
D.assert(geometry != null);
D.assert(shape != null);
this.geometry = geometry;
this.shape = shape;
this.notchMargin = notchMargin;
}
public BottomAppBar(
Key key = null,
Color color = null,
float?elevation = null,
NotchedShape shape = null,
Clip clipBehavior = Clip.none,
float notchMargin = 4.0f,
Widget child = null
) : base(key: key)
{
D.assert(elevation == null || elevation >= 0.0f);
this.child = child;
this.color = color;
this.elevation = elevation;
this.shape = shape;
this.clipBehavior = clipBehavior;
this.notchMargin = notchMargin;
}
