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" stroke-width="1.5" fill="none" xmlns="http://www.w3.org/2000/svg">
<path d="M12 2C16.9706 2 21 6.10406 21 11.1667C21 11.235 20.9993 11.3031 20.9978 11.3711C20.9773 12.3247 20.1331 13 19.1792 13H4.82077C3.8669 13 3.02268 12.3247 3.00219 11.3711C3.00073 11.3031 3 11.235 3 11.1667C3 6.10406 7.02944 2 12 2Z" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round"/>
<path d="M6 13L7 14.125C7.5703 14.7666 7.5703 15.7334 7 16.375V16.375C6.4297 17.0166 6.4297 17.9834 7 18.625V18.625C7.5703 19.2666 7.5703 20.2334 7 20.875L6 22" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round"/>
<path d="M11 13L12 14.125C12.5703 14.7666 12.5703 15.7334 12 16.375V16.375C11.4297 17.0166 11.4297 17.9834 12 18.625V18.625C12.5703 19.2666 12.5703 20.2334 12 20.875L11 22" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round"/>
<path d="M16 13L17 14.125C17.5703 14.7666 17.5703 15.7334 17 16.375V16.375C16.4297 17.0166 16.4297 17.9834 17 18.625V18.625C17.5703 19.2666 17.5703 20.2334 17 20.875L16 22" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round"/>
</svg>
''',
      colorFilter:
          color != null ? widgets.ColorFilter.mode(color!, widgets.BlendMode.srcIn) : null,
      width: width,
      height: height,
    );