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" stroke-width="1.5" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg">
<path d="M2.5 20C3.5 20 4.5 19.2 4.5 18C4.5 16.8 4.5 13.3333 4.5 11C4.5 7.5 7.6 4 12 4" stroke="currentColor"  stroke-linecap="round"/>
<path d="M21.5 20C20.5 20 19.5 19.2 19.5 18V11C19.5 7.5 16.4 4 12 4" stroke="currentColor"  stroke-linecap="round"/>
<path d="M12 19C14.7614 19 17 17.8807 17 16.5C17 15.1193 14.7614 14 12 14C9.23858 14 7 15.1193 7 16.5C7 17.8807 9.23858 19 12 19Z" stroke="currentColor"  stroke-linecap="round" stroke-linejoin="round"/>
<path d="M7.75036 15C7.28731 14.3647 7 13.4793 7 12.5C7 10.567 8.11929 9 9.5 9C10.8807 9 12 10.567 12 12.5C12 12.9554 11.9379 13.3904 11.8249 13.7895" stroke="currentColor"  stroke-linecap="round" stroke-linejoin="round"/>
<path d="M16.2496 15C16.7127 14.3647 17 13.4793 17 12.5C17 10.567 15.8807 9 14.5 9C13.1193 9 12 10.567 12 12.5C12 12.9554 12.0621 13.3904 12.1751 13.7895" stroke="currentColor"  stroke-linecap="round" stroke-linejoin="round"/>
<path d="M9.5 12V14" stroke="currentColor"  stroke-linecap="round" stroke-linejoin="round"/>
<path d="M14.5 12V14" stroke="currentColor"  stroke-linecap="round" stroke-linejoin="round"/>
</svg>
''',
      colorFilter:
          color != null ? widgets.ColorFilter.mode(color!, widgets.BlendMode.srcIn) : null,
      width: width,
      height: height,
    );