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" stroke-width="1.5" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg">
<path d="M11.672 20.7858C11.8713 20.916 12.1287 20.916 12.328 20.7858L21.6116 14.7239C21.8403 14.5745 21.9393 14.2894 21.8523 14.0304L18.2848 3.40896C18.2028 3.16462 17.9738 3 17.7161 3H6.22057C5.96168 3 5.73198 3.16606 5.65082 3.4119L2.14466 14.032C2.05937 14.2904 2.15858 14.5738 2.38637 14.7225L11.672 20.7858Z" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round"/>
<path d="M14.5 6H10L9.5 11C10.0187 10.1033 10.9882 9.5 12.0987 9.5C13.7555 9.5 15.0987 10.8431 15.0987 12.5C15.0987 13.327 14.764 14.0758 14.2228 14.6185C13.6797 15.163 12.9285 15.5 12.0987 15.5C10.9882 15.5 10.0187 14.8967 9.5 14" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round"/>
</svg>
''',
      colorFilter:
          color != null ? widgets.ColorFilter.mode(color!, widgets.BlendMode.srcIn) : null,
      width: width,
      height: height,
    );