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="M9 11C11.2091 11 13 9.20914 13 7C13 4.79086 11.2091 3 9 3C6.79086 3 5 4.79086 5 7C5 9.20914 6.79086 11 9 11Z" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round"/>
<path d="M2 18C2 14.134 5.13401 11 9 11C10.635 11 12.1391 11.5606 13.3306 12.5" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round"/>
<path d="M21.364 16.7069L21.6603 18.7069C21.8393 19.915 20.9032 21 19.6819 21H16.3181C15.0968 21 14.1607 19.915 14.3397 18.7069L14.636 16.7069C14.7813 15.7262 15.6231 15 16.6144 15H19.3856C20.3769 15 21.2187 15.7262 21.364 16.7069Z" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round"/>
<path d="M17 13H19" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round"/>
</svg>
''',
      colorFilter:
          color != null ? widgets.ColorFilter.mode(color!, widgets.BlendMode.srcIn) : null,
      width: width,
      height: height,
    );