public override Widget build(BuildContext context, float shrinkOffset, bool overlapsContent)
{
float?visibleMainHeight = maxExtent - shrinkOffset - topPadding;
float toolbarOpacity = !pinned || (!floating && bottom != null)
? ((visibleMainHeight - _bottomHeight) / material_.kToolbarHeight)?.clamp(0.0f, 1.0f) ?? 1.0f
: 1.0f;
Widget appBar = FlexibleSpaceBar.createSettings(
minExtent: minExtent,
maxExtent: maxExtent,
currentExtent: Mathf.Max(minExtent ?? 0.0f, maxExtent ?? 0.0f - shrinkOffset),
toolbarOpacity: toolbarOpacity,
child: new AppBar(
leading: leading,
automaticallyImplyLeading: automaticallyImplyLeading,
title: title,
actions: actions,
flexibleSpace: flexibleSpace,
bottom: bottom,
elevation: forceElevated || overlapsContent ||
(pinned && shrinkOffset > maxExtent - minExtent)
? elevation ?? 4.0f
: 0.0f,
backgroundColor: backgroundColor,
brightness: brightness,
iconTheme: iconTheme,
textTheme: textTheme,
primary: primary,
centerTitle: centerTitle,
titleSpacing: titleSpacing,
shape: shape,
toolbarOpacity: toolbarOpacity,
bottomOpacity: pinned
? 1.0f
: (visibleMainHeight / _bottomHeight)?.clamp(0.0f, 1.0f) ?? 1.0f
)
);
return(floating ? new _FloatingAppBar(child: appBar) : appBar);
}
public override Widget build(BuildContext context, float shrinkOffset, bool overlapsContent)
{
float?visibleMainHeight = this.maxExtent - shrinkOffset - this.topPadding;
float toolbarOpacity = this.pinned && !this.floating
? 1.0f
: ((visibleMainHeight - this._bottomHeight) / Constants.kToolbarHeight)?.clamp(0.0f, 1.0f) ?? 0.0f;
Widget appBar = FlexibleSpaceBar.createSettings(
minExtent: this.minExtent,
maxExtent: this.maxExtent,
currentExtent: Mathf.Max(this.minExtent ?? 0.0f, this.maxExtent ?? 0.0f - shrinkOffset),
toolbarOpacity: toolbarOpacity,
child: new AppBar(
leading: this.leading,
automaticallyImplyLeading: this.automaticallyImplyLeading,
title: this.title,
actions: this.actions,
flexibleSpace: this.flexibleSpace,
bottom: this.bottom,
elevation: this.forceElevated || overlapsContent ||
(this.pinned && shrinkOffset > this.maxExtent - this.minExtent)
? this.elevation ?? 4.0f
: 0.0f,
backgroundColor: this.backgroundColor,
brightness: this.brightness,
iconTheme: this.iconTheme,
textTheme: this.textTheme,
primary: this.primary,
centerTitle: this.centerTitle,
titleSpacing: this.titleSpacing,
toolbarOpacity: toolbarOpacity,
bottomOpacity: this.pinned
? 1.0f
: (visibleMainHeight / this._bottomHeight)?.clamp(0.0f, 1.0f) ?? 1.0f
)
);
return(this.floating ? new _FloatingAppBar(child: appBar) : appBar);
}