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="M21.75 17C21.75 19.6234 19.6234 21.75 17 21.75H7C4.37665 21.75 2.25 19.6234 2.25 17V7C2.25 4.37665 4.37665 2.25 7 2.25H17C19.6234 2.25 21.75 4.37665 21.75 7V17ZM7 16.75C6.58579 16.75 6.25 16.4142 6.25 16V8C6.25 7.80109 6.32902 7.61032 6.46967 7.46967C6.61032 7.32902 6.80109 7.25 7 7.25L9 7.25C10.5188 7.25 11.75 8.48122 11.75 10C11.75 11.5188 10.5188 12.75 9 12.75H7.75V16C7.75 16.4142 7.41421 16.75 7 16.75ZM7.75 11.25H9C9.69036 11.25 10.25 10.6904 10.25 10C10.25 9.30964 9.69036 8.75 9 8.75H7.75V11.25ZM16.329 11.3354C16.5143 11.7059 16.9648 11.8561 17.3352 11.6708C17.7057 11.4856 17.8559 11.0351 17.6707 10.6646C17.2372 9.79764 16.3511 9.25 15.3818 9.25H14.9998C13.7572 9.25 12.7498 10.2574 12.7498 11.5C12.7498 12.7426 13.7572 13.75 14.9998 13.75H15.4998C15.914 13.75 16.2498 14.0858 16.2498 14.5C16.2498 14.9142 15.914 15.25 15.4998 15.25H15.1179C14.7167 15.25 14.35 15.0234 14.1707 14.6646C13.9854 14.2941 13.5349 14.1439 13.1644 14.3292C12.7939 14.5144 12.6438 14.9649 12.829 15.3354C13.2625 16.2024 14.1486 16.75 15.1179 16.75H15.4998C16.7425 16.75 17.7498 15.7426 17.7498 14.5C17.7498 13.2574 16.7425 12.25 15.4998 12.25H14.9998C14.5856 12.25 14.2498 11.9142 14.2498 11.5C14.2498 11.0858 14.5856 10.75 14.9998 10.75H15.3818C15.7829 10.75 16.1496 10.9766 16.329 11.3354Z" fill="currentColor"/>
</svg>
''',
      colorFilter:
          color != null ? widgets.ColorFilter.mode(color!, widgets.BlendMode.srcIn) : null,
      width: width,
      height: height,
    );