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">
<g clip-path="url(#clip0_4265_8372)">
<path fill-rule="evenodd" clip-rule="evenodd" d="M12.9546 0.893452C12.4274 0.366244 11.5726 0.366246 11.0454 0.893453L8.23995 3.69892C8.45878 3.90688 8.66938 4.10872 8.78033 4.21967L11.0299 6.46925C11.3237 6.32868 11.6526 6.24996 12 6.24996C13.2427 6.24996 14.25 7.25732 14.25 8.49996C14.25 8.84735 14.1713 9.17636 14.0307 9.4701L15.2799 10.7193C15.5736 10.5787 15.9026 10.5 16.25 10.5C17.4926 10.5 18.5 11.5074 18.5 12.75C18.5 13.9926 17.4926 15 16.25 15C15.0074 15 14 13.9926 14 12.75C14 12.4027 14.0787 12.0737 14.2193 11.78L12.97 10.5307C12.8987 10.5649 12.8252 10.5953 12.75 10.6219V14.378C13.6239 14.6869 14.25 15.5203 14.25 16.5C14.25 17.7426 13.2426 18.75 12 18.75C10.7574 18.75 9.75 17.7426 9.75 16.5C9.75 15.5203 10.3761 14.6869 11.25 14.378V10.6219C10.3761 10.313 9.75002 9.47961 9.75002 8.49996C9.75002 8.15261 9.82872 7.82365 9.96928 7.52994L7.71967 5.28033C7.64633 5.207 7.43031 4.98097 7.20003 4.73883L0.893941 11.0449C0.366732 11.5721 0.366734 12.4269 0.893941 12.9541L11.0454 23.1056C11.5726 23.6328 12.4274 23.6328 12.9546 23.1056L23.1061 12.9541C23.6333 12.4269 23.6333 11.5721 23.1061 11.0449L12.9546 0.893452ZM12 15.75C11.5858 15.75 11.25 16.0858 11.25 16.5C11.25 16.9142 11.5858 17.25 12 17.25C12.4142 17.25 12.75 16.9142 12.75 16.5C12.75 16.0858 12.4142 15.75 12 15.75ZM12.75 8.49996C12.75 8.91417 12.4142 9.24996 12 9.24996C11.5858 9.24996 11.25 8.91417 11.25 8.49996C11.25 8.08574 11.5858 7.74996 12 7.74996C12.4142 7.74996 12.75 8.08574 12.75 8.49996ZM15.5 12.75C15.5 12.3358 15.8358 12 16.25 12C16.6642 12 17 12.3358 17 12.75C17 13.1642 16.6642 13.5 16.25 13.5C15.8358 13.5 15.5 13.1642 15.5 12.75Z" fill="currentColor"/>
</g>
<defs>
<clipPath id="clip0_4265_8372">
<rect width="24" height="24" fill="white"/>
</clipPath>
</defs>
</svg>
''',
      colorFilter:
          color != null ? widgets.ColorFilter.mode(color!, widgets.BlendMode.srcIn) : null,
      width: width,
      height: height,
    );