build method

@override Widget build(BuildContext context)

Describes the part of the user interface represented by this widget.

The framework calls this method when this widget is inserted into the tree in a given BuildContext and when the dependencies of this widget change (e.g., an InheritedWidget referenced by this widget changes). This method can potentially be called in every frame and should not have any side effects beyond building a widget.

The framework replaces the subtree below this widget with the widget returned by this method, either by updating the existing subtree or by removing the subtree and inflating a new subtree, depending on whether the widget returned by this method can update the root of the existing subtree, as determined by calling Widget.canUpdate.

Typically implementations return a newly created constellation of widgets that are configured with information from this widget's constructor and from the given BuildContext.

The given BuildContext contains information about the location in the tree at which this widget is being built. For example, the context provides the set of inherited widgets for this location in the tree. A given widget might be built with multiple different BuildContext arguments over time if the widget is moved around the tree or if the widget is inserted into the tree in multiple places at once.

The implementation of this method must only depend on:

• the fields of the widget, which themselves must not change over time, and
• any ambient state obtained from the context using BuildContext.dependOnInheritedWidgetOfExactType.

If a widget's build method is to depend on anything else, use a StatefulWidget instead.

See also:

• StatelessWidget, which contains the discussion on performance considerations.

Implementation

@override
widgets.Widget build(widgets.BuildContext context) => SvgPicture.string(
      '''
<svg width="48" height="48" viewBox="0 0 48 48" fill="none" xmlns="http://www.w3.org/2000/svg">
<path fill-rule="evenodd" clip-rule="evenodd" d="M24 6C14.0589 6 6 14.0589 6 24C6 33.9411 14.0589 42 24 42C33.9411 42 42 33.9411 42 24C42 14.0589 33.9411 6 24 6ZM4 24C4 12.9543 12.9543 4 24 4C35.0457 4 44 12.9543 44 24C44 35.0457 35.0457 44 24 44C12.9543 44 4 35.0457 4 24ZM16 30V14C16 13.4477 16.4477 13 17 13H23C25.7614 13 28 15.2386 28 18C28 20.6273 25.9736 22.7813 23.3984 22.9844L28 27.5859L32.2929 23.293L33.7072 24.7072L29.4142 29.0001L33.7071 33.293L32.2928 34.7072L28 30.4143L23.7072 34.7072L22.2929 33.293L26.5858 29.0001L20.5857 23H18V30H16ZM18 21H23C24.6569 21 26 19.6569 26 18C26 16.3431 24.6569 15 23 15H18V21Z" fill="black"/>
</svg>
''',
      colorFilter:
          color != null ? widgets.ColorFilter.mode(color!, widgets.BlendMode.srcIn) : null,
      width: width,
      height: height,
    );