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 fill-rule="evenodd" clip-rule="evenodd" d="M9.21255 12.75C9.12943 13.5242 8.9054 14.1421 8.5147 14.6891C7.99181 15.4211 7.11571 16.1036 5.66459 16.8292C5.29411 17.0144 5.14394 17.4649 5.32918 17.8354C5.51442 18.2059 5.96493 18.3561 6.33541 18.1708C7.88429 17.3964 9.00819 16.5789 9.7353 15.5609C10.4761 14.5238 10.75 13.3571 10.75 12V7.5C10.75 6.53351 9.96649 5.75 9 5.75H5C4.03351 5.75 3.25 6.53351 3.25 7.5V11C3.25 11.9665 4.03352 12.75 5 12.75H9.21255Z" fill="currentColor"/>
<path fill-rule="evenodd" clip-rule="evenodd" d="M19.2125 12.75C19.1294 13.5242 18.9054 14.1421 18.5147 14.6891C17.9918 15.4211 17.1157 16.1036 15.6646 16.8292C15.2941 17.0144 15.1439 17.4649 15.3292 17.8354C15.5144 18.2059 15.9649 18.3561 16.3354 18.1708C17.8843 17.3964 19.0082 16.5789 19.7353 15.5609C20.4761 14.5238 20.75 13.3571 20.75 12V7.5C20.75 6.53352 19.9665 5.75 19 5.75H15C14.0335 5.75 13.25 6.53352 13.25 7.5V11C13.25 11.9665 14.0335 12.75 15 12.75H19.2125Z" fill="currentColor"/>
</svg>
''',
      colorFilter:
          color != null ? widgets.ColorFilter.mode(color!, widgets.BlendMode.srcIn) : null,
      width: width,
      height: height,
    );