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="M23.1009 6.84867C23.4658 6.09862 24.5345 6.09862 24.8994 6.84867L41.3008 40.5628C41.6239 41.227 41.1402 42.0002 40.4016 42.0002H7.59866C6.86002 42.0002 6.3763 41.227 6.69943 40.5628L23.1009 6.84867ZM22 20C22 18.8954 22.8954 18 24 18C25.1046 18 26 18.8954 26 20V30C26 31.1046 25.1046 32 24 32C22.8954 32 22 31.1046 22 30V20ZM23.9665 34C22.8806 34 22.0002 34.8803 22.0002 35.9663C22.0002 37.0523 22.8806 37.9326 23.9665 37.9326H24.0339C25.1199 37.9326 26.0002 37.0523 26.0002 35.9663C26.0002 34.8803 25.1199 34 24.0339 34H23.9665Z" fill="black"/>
</svg>
''',
      colorFilter:
          color != null ? widgets.ColorFilter.mode(color!, widgets.BlendMode.srcIn) : null,
      width: width,
      height: height,
    );