MorphingSliverAppBar constructor

const MorphingSliverAppBar({ Key? key, Object heroTag = 'MorphingAppBar', Widget? leading, bool automaticallyImplyLeading = true, Widget? title, List<Widget>? actions, Widget? flexibleSpace, PreferredSizeWidget? bottom, double? elevation, Color? shadowColor, bool forceElevated = false, Color? backgroundColor, Color? foregroundColor, IconThemeData? iconTheme, IconThemeData? actionsIconTheme, bool primary = true, bool? centerTitle, bool excludeHeaderSemantics = false, double? titleSpacing, double? collapsedHeight, double? expandedHeight, bool floating = false, bool pinned = false, bool snap = false, bool stretch = false, double stretchTriggerOffset = 100.0, AsyncCallback? onStretchTrigger, ShapeBorder? shape, double toolbarHeight = kToolbarHeight, double? leadingWidth, TextStyle? toolbarTextStyle, TextStyle? titleTextStyle, SystemUiOverlayStyle? systemOverlayStyle, })

Creates a material design app bar that can be placed in a CustomScrollView.

The arguments forceElevated, primary, floating, pinned, snap and automaticallyImplyLeading must not be null.

Implementation

const MorphingSliverAppBar({
  super.key,
  this.heroTag = 'MorphingAppBar',
  this.leading,
  this.automaticallyImplyLeading = true,
  this.title,
  this.actions,
  this.flexibleSpace,
  this.bottom,
  this.elevation,
  this.shadowColor,
  this.forceElevated = false,
  this.backgroundColor,
  this.foregroundColor,
  this.iconTheme,
  this.actionsIconTheme,
  this.primary = true,
  this.centerTitle,
  this.excludeHeaderSemantics = false,
  this.titleSpacing,
  this.collapsedHeight,
  this.expandedHeight,
  this.floating = false,
  this.pinned = false,
  this.snap = false,
  this.stretch = false,
  this.stretchTriggerOffset = 100.0,
  this.onStretchTrigger,
  this.shape,
  this.toolbarHeight = kToolbarHeight,
  this.leadingWidth,
  this.toolbarTextStyle,
  this.titleTextStyle,
  this.systemOverlayStyle,
})  : assert(
        floating || !snap,
        'The "snap" argument only makes sense for floating app bars.',
      ),
      assert(stretchTriggerOffset > 0.0),
      assert(
        collapsedHeight == null || collapsedHeight >= toolbarHeight,
        'The "collapsedHeight" argument has to be larger than or equal to [toolbarHeight].',
      );