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 12C14.2091 12 16 10.2091 16 8C16 5.79086 14.2091 4 12 4C9.79086 4 8 5.79086 8 8C8 10.2091 9.79086 12 12 12Z" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round"/>
<path d="M5 20V19C5 15.134 8.13401 12 12 12C13.0736 12 14.0907 12.2417 15 12.6736" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round"/>
<path d="M16.6349 16.4151L17.674 14.2121C17.8073 13.9293 18.1927 13.9293 18.326 14.2121L19.3651 16.4151L21.6886 16.7706C21.9867 16.8162 22.1055 17.1997 21.8897 17.4198L20.2087 19.1334L20.6054 21.5543C20.6564 21.8652 20.3446 22.1022 20.0778 21.9554L18 20.8118L15.9222 21.9554C15.6554 22.1022 15.3436 21.8652 15.3946 21.5543L15.7913 19.1334L14.1103 17.4198C13.8945 17.1997 14.0133 16.8162 14.3114 16.7706L16.6349 16.4151Z" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round"/>
</svg>
''',
      colorFilter:
          color != null ? widgets.ColorFilter.mode(color!, widgets.BlendMode.srcIn) : null,
      width: width,
      height: height,
    );