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 17C12.5523 17 13 16.5523 13 16C13 15.4477 12.5523 15 12 15C11.4477 15 11 15.4477 11 16C11 16.5523 11.4477 17 12 17Z" fill="currentColor" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round"/>
<path d="M21 7.35304L21 16.647C21 16.8649 20.8819 17.0656 20.6914 17.1715L12.2914 21.8381C12.1102 21.9388 11.8898 21.9388 11.7086 21.8381L3.30861 17.1715C3.11814 17.0656 3 16.8649 3 16.647L2.99998 7.35304C2.99998 7.13514 3.11812 6.93437 3.3086 6.82855L11.7086 2.16188C11.8898 2.06121 12.1102 2.06121 12.2914 2.16188L20.6914 6.82855C20.8818 6.93437 21 7.13514 21 7.35304Z" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round"/>
<path d="M20.5 16.7222L12.2914 12.1618C12.1102 12.0612 11.8898 12.0612 11.7086 12.1618L3.5 16.7222" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round"/>
<path d="M3.52844 7.29363L11.7086 11.8382C11.8898 11.9388 12.1102 11.9388 12.2914 11.8382L20.5 7.27783" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round"/>
<path d="M12 3L12 12" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round"/>
<path d="M12 19.5V22" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round"/>
</svg>
''',
      colorFilter:
          color != null ? widgets.ColorFilter.mode(color!, widgets.BlendMode.srcIn) : null,
      width: width,
      height: height,
    );