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="48" height="48" viewBox="0 0 48 48" fill="none" xmlns="http://www.w3.org/2000/svg">
<path fill-rule="evenodd" clip-rule="evenodd" d="M24 10C24.8074 10 25.5356 10.4855 25.8462 11.2308L33.329 29.1894C33.3413 29.2172 33.353 29.2452 33.364 29.2736L35.8462 35.2308C36.271 36.2504 35.7889 37.4213 34.7693 37.8462C33.7497 38.271 32.5787 37.7888 32.1539 36.7692L30.1667 32H17.8334L15.8462 36.7692C15.4214 37.7888 14.2504 38.271 13.2308 37.8462C12.2112 37.4213 11.729 36.2504 12.1539 35.2308L14.636 29.2736C14.6471 29.2452 14.6588 29.2172 14.6711 29.1895L22.1539 11.2308C22.4644 10.4855 23.1926 10 24 10ZM19.5 28H28.5L24 17.2L19.5 28Z" fill="black"/>
</svg>
''',
      colorFilter:
          color != null ? widgets.ColorFilter.mode(color!, widgets.BlendMode.srcIn) : null,
      width: width,
      height: height,
    );