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="M10 24C10 16.268 16.268 10 24 10C31.732 10 38 16.268 38 24C38 27.1447 36.9632 30.0472 35.2128 32.3843L37.4142 34.5858C38.1953 35.3668 38.1953 36.6332 37.4142 37.4142C36.6332 38.1953 35.3668 38.1953 34.5858 37.4142L32.3843 35.2128C30.0472 36.9632 27.1447 38 24 38C16.268 38 10 31.732 10 24ZM32.3432 29.5148L29.4142 26.5858C28.6332 25.8047 27.3668 25.8047 26.5858 26.5858C25.8047 27.3668 25.8047 28.6332 26.5858 29.4142L29.5148 32.3432C27.9339 33.3902 26.0382 34 24 34C18.4772 34 14 29.5228 14 24C14 18.4772 18.4772 14 24 14C29.5228 14 34 18.4772 34 24C34 26.0382 33.3902 27.9339 32.3432 29.5148Z" fill="black"/>
</svg>
''',
      colorFilter:
          color != null ? widgets.ColorFilter.mode(color!, widgets.BlendMode.srcIn) : null,
      width: width,
      height: height,
    );