build method

  1. @override
Widget build(
  1. BuildContext context
)
override

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:

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" stroke-width="1.5" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg">
<path d="M9.14286 3.00375L14.8571 3M9.14286 3.00375L2 15.0038M9.14286 3.00375L14.0446 12.5M14.8571 3L5.575 21M14.8571 3L20.2126 12M5.575 21L2 15.0038M5.575 21H12.0036M2 15.0038H12.5" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round"/>
<path d="M22.6663 17.6667C22.0476 16.097 20.6344 15 18.9901 15C17.2317 15 15.7376 16.2545 15.1967 18" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round"/>
<path d="M20.9951 17.7722H22.4C22.7314 17.7722 23 17.5036 23 17.1722V15.55" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round"/>
<path d="M15.3337 20.3333C15.9524 21.903 17.3656 23 19.0099 23C20.7683 23 22.2624 21.7455 22.8033 20" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round"/>
<path d="M17.0049 20.2278H15.6C15.2686 20.2278 15 20.4964 15 20.8278V22.45" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round"/>
</svg>
''',
      colorFilter:
          color != null ? widgets.ColorFilter.mode(color!, widgets.BlendMode.srcIn) : null,
      width: width,
      height: height,
    );