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" viewBox="0 0 24 24" stroke-width="1.5" fill="none" xmlns="http://www.w3.org/2000/svg">
<path d="M10 21.4V14.3937C10 14.0623 10.2686 13.7937 10.6 13.7937H11.7728C11.9768 13.7937 12.1667 13.6901 12.2772 13.5186L13.7228 11.275C13.8333 11.1036 14.0232 11 14.2272 11H17.7728C17.9768 11 18.1667 11.1036 18.2772 11.275L19.7228 13.5186C19.8333 13.6901 20.0232 13.7937 20.2272 13.7937H21.4C21.7314 13.7937 22 14.0623 22 14.3937V21.4C22 21.7314 21.7314 22 21.4 22H10.6C10.2686 22 10 21.7314 10 21.4Z" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round"/>
<path d="M16 19C17.1046 19 18 18.1046 18 17C18 15.8954 17.1046 15 16 15C14.8954 15 14 15.8954 14 17C14 18.1046 14.8954 19 16 19Z" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round"/>
<path d="M3 18V21H5.5" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round"/>
<path d="M3 9.5L3 14.5" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round"/>
<path d="M3 6V3H6" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round"/>
<path d="M9.5 3L14.5 3" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round"/>
<path d="M18 3H21V5.5" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round"/>
<path d="M21 10V8.5" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round"/>
</svg>
''',
      colorFilter:
          color != null ? widgets.ColorFilter.mode(color!, widgets.BlendMode.srcIn) : null,
      width: width,
      height: height,
    );