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" stroke-width="1.5" fill="none" xmlns="http://www.w3.org/2000/svg">
<path d="M12.1469 18.28L13.3306 12.48C13.3876 12.2007 13.6334 12 13.9185 12H20.0815C20.3666 12 20.6124 12.2007 20.6694 12.48L21.8531 18.28C21.929 18.6519 21.6448 19 21.2652 19H12.7348C12.3552 19 12.071 18.6519 12.1469 18.28Z" stroke="currentColor" stroke-linecap="round"/>
<path d="M7.14693 11.28L8.33061 5.48002C8.38762 5.20066 8.63337 5 8.91849 5H15.0815C15.3666 5 15.6124 5.20066 15.6694 5.48002L16.8531 11.28C16.929 11.6519 16.6448 12 16.2652 12H7.73482C7.35523 12 7.07103 11.6519 7.14693 11.28Z" stroke="currentColor" stroke-linecap="round"/>
<path d="M2.14693 18.28L3.33061 12.48C3.38762 12.2007 3.63337 12 3.91849 12H10.0815C10.3666 12 10.6124 12.2007 10.6694 12.48L11.8531 18.28C11.929 18.6519 11.6448 19 11.2652 19H2.73482C2.35523 19 2.07103 18.6519 2.14693 18.28Z" stroke="currentColor" stroke-linecap="round"/>
</svg>
''',
      colorFilter:
          color != null ? widgets.ColorFilter.mode(color!, widgets.BlendMode.srcIn) : null,
      width: width,
      height: height,
    );