appBarBackgroundBuilder property

JkAppBarBackgroundBuilder? appBarBackgroundBuilder
final

Called to build background for appBar. Widget return by this function will become the backgroud of appBar. If this is set, appBar could NOT set background. This function provide a parameter collapsedRatio, which is between 0(fully expanded) and 1(fully collapsed). You can make some effects (ex. fading) according to 'collapsedRatio'.

Implementation

final JkAppBarBackgroundBuilder? appBarBackgroundBuilder;