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="M21.5 14L20 9C20 9 19.5 7 17.5 7C17.5 7 17.5 5 15.5 5C13.5 5 13.5 7 13.5 7H10.5C10.5 7 10.5 5 8.5 5C6.5 5 6.5 7 6.5 7C4.5 7 4 9 4 9L2.5 14" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round"/>
<path d="M6 20C8.20914 20 10 18.2091 10 16C10 13.7909 8.20914 12 6 12C3.79086 12 2 13.7909 2 16C2 18.2091 3.79086 20 6 20Z" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round"/>
<path d="M18 20C20.2091 20 22 18.2091 22 16C22 13.7909 20.2091 12 18 12C15.7909 12 14 13.7909 14 16C14 18.2091 15.7909 20 18 20Z" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round"/>
<path d="M12 16C13.1046 16 14 15.1046 14 14C14 12.8954 13.1046 12 12 12C10.8954 12 10 12.8954 10 14C10 15.1046 10.8954 16 12 16Z" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round"/>
</svg>
''',
      colorFilter:
          color != null ? widgets.ColorFilter.mode(color!, widgets.BlendMode.srcIn) : null,
      width: width,
      height: height,
    );