build method

  1. @override
Widget build(
  1. BuildContext context
)
override

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:

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="M6.74534 4H17.3132C17.3132 4 16.4326 17.2571 12.0293 17.2571C9.87826 17.2571 8.56786 14.0935 7.79011 10.8571C6.97574 7.46844 6.74534 4 6.74534 4Z" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round"/>
<path d="M17.3132 4C17.3132 4 18.2344 3.01733 19 2.99999C20.5 2.96603 20.7773 4 20.7773 4C21.0709 4.60953 21.3057 6.19429 19.8967 7.65715C18.4876 9.12 16.9103 10.4 16.2684 10.8571" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round"/>
<path d="M6.74527 4.00001C6.74527 4.00001 5.78547 3.00614 4.99995 3.00001C3.49995 2.9883 3.22264 4.00001 3.22264 4.00001C2.92908 4.60953 2.69424 6.19429 4.1033 7.65715C5.51235 9.12001 7.14823 10.4 7.79004 10.8572" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round"/>
<path d="M8.50662 20C8.50662 18.1714 12.0292 17.2571 12.0292 17.2571C12.0292 17.2571 15.5519 18.1714 15.5519 20H8.50662Z" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round"/>
</svg>
''',
      colorFilter:
          color != null ? widgets.ColorFilter.mode(color!, widgets.BlendMode.srcIn) : null,
      width: width,
      height: height,
    );