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" fill="none" xmlns="http://www.w3.org/2000/svg">
<path d="M21 21L9 21" stroke="currentColor" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"/>
<path d="M14.9142 3.41421L19.864 8.36396C20.645 9.14501 20.645 10.4113 19.864 11.1924L10.6213 20.435C10.2596 20.7968 9.76894 21 9.25736 21C8.74577 21 8.25514 20.7968 7.8934 20.435L2.8934 15.435C2.11235 14.654 2.11235 13.3877 2.8934 12.6066L7 8.5L11.75 13.25C12.4404 13.9404 13.5596 13.9404 14.25 13.25C14.9404 12.5596 14.9404 11.4404 14.25 10.75L9.5 6L12.0858 3.41421C12.8668 2.63317 14.1332 2.63317 14.9142 3.41421Z" fill="currentColor" stroke="currentColor" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"/>
</svg>
''',
      colorFilter:
          color != null ? widgets.ColorFilter.mode(color!, widgets.BlendMode.srcIn) : null,
      width: width,
      height: height,
    );