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" fill="none" xmlns="http://www.w3.org/2000/svg">
<path fill-rule="evenodd" clip-rule="evenodd" d="M2.25 3.6C2.25 2.85441 2.85442 2.25 3.6 2.25H20.4C21.1456 2.25 21.75 2.85442 21.75 3.6V20.4C21.75 21.1456 21.1456 21.75 20.4 21.75H3.6C2.85441 21.75 2.25 21.1456 2.25 20.4V3.6ZM10.6585 11.4454C10.4332 11.2898 10.25 11.0349 10.25 10.5C10.25 9.63851 10.4864 9.26348 10.7109 9.07743C10.964 8.8676 11.3762 8.75 12 8.75C12.6238 8.75 13.036 8.8676 13.2891 9.07743C13.5136 9.26348 13.75 9.63851 13.75 10.5C13.75 11.0349 13.5668 11.2898 13.3415 11.4454C13.0688 11.6338 12.6213 11.75 12 11.75C11.3787 11.75 10.9312 11.6338 10.6585 11.4454ZM9.80598 12.6796C10.4381 13.1162 11.2406 13.25 12 13.25C12.5674 13.25 13.1588 13.1753 13.6853 12.9555C13.685 12.9573 13.6848 12.9591 13.6846 12.9609C13.6207 13.5149 13.5004 13.918 13.3066 14.2194C12.9593 14.7597 12.1814 15.25 10 15.25C9.58579 15.25 9.25 15.5858 9.25 16C9.25 16.4142 9.58579 16.75 10 16.75C12.3186 16.75 13.7907 16.2403 14.5684 15.0306C14.9371 14.457 15.098 13.7976 15.1747 13.1328C15.25 12.4804 15.25 11.7567 15.25 11.0279V11C15.25 10.9459 15.2443 10.8932 15.2334 10.8424C15.2444 10.7316 15.25 10.6174 15.25 10.5C15.25 9.36149 14.9267 8.48652 14.2464 7.92257C13.5947 7.3824 12.7569 7.25 12 7.25C11.2431 7.25 10.4053 7.3824 9.75361 7.92257C9.07325 8.48652 8.75 9.36149 8.75 10.5C8.75 11.4651 9.12642 12.2102 9.80598 12.6796Z" fill="currentColor"/>
</svg>
''',
      colorFilter:
          color != null ? widgets.ColorFilter.mode(color!, widgets.BlendMode.srcIn) : null,
      width: width,
      height: height,
    );