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="24" height="24" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg">
<path fill-rule="evenodd" clip-rule="evenodd" d="M1.25 12C1.25 6.06294 6.06294 1.25 12 1.25C17.937 1.25 22.75 6.06293 22.75 12C22.75 17.937 17.937 22.75 12 22.75C10.1437 22.75 8.39536 22.2788 6.87016 21.4493L2.63727 22.2373C2.39422 22.2826 2.14448 22.2051 1.96967 22.0303C1.79485 21.8555 1.71742 21.6058 1.76267 21.3627L2.55076 17.1298C1.72113 15.6046 1.25 13.8563 1.25 12ZM10.3446 7.60313C10.0001 7.89541 9.75 8.34102 9.75 9.00001C9.75 9.41422 9.41421 9.75001 9 9.75001C8.58579 9.75001 8.25 9.41422 8.25 9.00001C8.25 7.90899 8.68736 7.04209 9.37414 6.45937C10.0446 5.89048 10.9119 5.625 11.75 5.625C12.5882 5.625 13.4554 5.89049 14.1259 6.45938C14.8126 7.0421 15.25 7.90899 15.25 9.00001C15.25 9.76589 15.0538 10.3495 14.7334 10.8301C14.4642 11.234 14.1143 11.5462 13.839 11.7919C13.8089 11.8187 13.7798 11.8447 13.7517 11.8699C13.4445 12.1464 13.213 12.3743 13.0433 12.6741C12.881 12.9609 12.75 13.3616 12.75 13.9999C12.75 14.4141 12.4142 14.7499 12 14.7499C11.5858 14.7499 11.25 14.4141 11.25 13.9999C11.25 13.1382 11.4315 12.4764 11.7379 11.9352C12.037 11.4069 12.4305 11.041 12.7483 10.755L12.8205 10.6901C13.1207 10.4204 13.3276 10.2347 13.4853 9.99803C13.6337 9.77553 13.75 9.48414 13.75 9.00001C13.75 8.34103 13.4999 7.89542 13.1554 7.60314C12.7946 7.29702 12.2868 7.125 11.75 7.125C11.2131 7.125 10.7054 7.29702 10.3446 7.60313ZM12.5672 18.501C12.8445 18.1933 12.8197 17.719 12.512 17.4418C12.2042 17.1646 11.73 17.1893 11.4528 17.497L11.4428 17.5081C11.1655 17.8159 11.1903 18.2901 11.498 18.5674C11.8058 18.8446 12.28 18.8199 12.5572 18.5121L12.5672 18.501Z" fill="currentColor"/>
</svg>
''',
      colorFilter:
          color != null ? widgets.ColorFilter.mode(color!, widgets.BlendMode.srcIn) : null,
      width: width,
      height: height,
    );