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="M3.33789 17C5.06694 19.989 8.29866 22 12.0001 22C15.7015 22 18.9332 19.989 20.6622 17" stroke="currentColor"   stroke-linecap="round" stroke-linejoin="round"/>
<path d="M3.33789 7C5.06694 4.01099 8.29866 2 12.0001 2C15.7015 2 18.9332 4.01099 20.6622 7" stroke="currentColor"   stroke-linecap="round" stroke-linejoin="round"/>
<path d="M13 21.9506C13 21.9506 14.4079 20.0966 15.2947 16.9999" stroke="currentColor"   stroke-linecap="round" stroke-linejoin="round"/>
<path d="M13 2.04932C13 2.04932 14.4079 3.90328 15.2947 7" stroke="currentColor"   stroke-linecap="round" stroke-linejoin="round"/>
<path d="M11 21.9506C11 21.9506 9.59215 20.0966 8.70532 16.9999" stroke="currentColor"   stroke-linecap="round" stroke-linejoin="round"/>
<path d="M11 2.04932C11 2.04932 9.59215 3.90328 8.70532 7" stroke="currentColor"   stroke-linecap="round" stroke-linejoin="round"/>
<path d="M9 10L10.5 15L12 10L13.5 15L15 10" stroke="currentColor"   stroke-linecap="round" stroke-linejoin="round"/>
<path d="M1 10L2.5 15L4 10L5.5 15L7 10" stroke="currentColor"   stroke-linecap="round" stroke-linejoin="round"/>
<path d="M17 10L18.5 15L20 10L21.5 15L23 10" stroke="currentColor"   stroke-linecap="round" stroke-linejoin="round"/>
</svg>
''',
      colorFilter:
          color != null ? widgets.ColorFilter.mode(color!, widgets.BlendMode.srcIn) : null,
      width: width,
      height: height,
    );