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="M13 17C13 17.5523 12.5523 18 12 18C11.4477 18 11 17.5523 11 17C11 16.4477 11.4477 16 12 16C12.5523 16 13 16.4477 13 17Z" fill="black"/>
<path d="M10 9.8C10 8.95597 10.8707 8 12.3091 8C13.7475 8 14.6182 8.95597 14.6182 9.8C14.6182 10.5868 13.7816 11.5792 12.1027 11.5997C11.5369 11.6066 11.0545 12.0646 11.0545 12.66V14C11.0545 14.5523 11.5023 15 12.0545 15C12.6068 15 13.0545 14.5523 13.0545 14V13.5101C15.002 13.1545 16.6182 11.7692 16.6182 9.8C16.6182 7.55124 14.5258 6 12.3091 6C10.0924 6 8 7.55124 8 9.8C8 10.3523 8.44772 10.8 9 10.8C9.55228 10.8 10 10.3523 10 9.8Z" fill="black"/>
<path fill-rule="evenodd" clip-rule="evenodd" d="M12 22C17.5228 22 22 17.5228 22 12C22 6.47715 17.5228 2 12 2C6.47715 2 2 6.47715 2 12C2 17.5228 6.47715 22 12 22ZM12 20C16.4183 20 20 16.4183 20 12C20 7.58172 16.4183 4 12 4C7.58172 4 4 7.58172 4 12C4 16.4183 7.58172 20 12 20Z" fill="black"/>
</svg>
''',
      colorFilter:
          color != null ? widgets.ColorFilter.mode(color!, widgets.BlendMode.srcIn) : null,
      width: width,
      height: height,
    );