AppBar Widget in flutter Arabic
AppBar class
A material design app bar.
An app bar consists of a toolbar and potentially other widgets, such as a TabBar and a FlexibleSpaceBar. App bars typically expose one or more common actions with IconButtons which are optionally followed by a PopupMenuButton for less common operations (sometimes called the "overflow menu").
App bars are typically used in the Scaffold.appBar property, which places the app bar as a fixed-height widget at the top of the screen. For a scrollable app bar, see SliverAppBar, which embeds an AppBar in a sliver for use in a CustomScrollView.
The AppBar displays the toolbar widgets, leading, title, and actions, above the bottom (if any). The bottom is usually used for a TabBar. If a flexibleSpace widget is specified then it is stacked behind the toolbar and the bottom widget. The following diagram shows where each of these slots appears in the toolbar when the writing language is left-to-right (e.g. English):
The AppBar insets its content based on the ambient MediaQuery's padding, to avoid system UI intrusions. It's taken care of by Scaffold when used in the Scaffold.appBar property. When animating an AppBar, unexpected MediaQuery changes (as is common in Hero animations) may cause the content to suddenly jump. Wrap the AppBar in a MediaQuery widget, and adjust its padding such that the animation is smooth.
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