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 7.58579 6.58579 7.25 7 7.25C7.41421 7.25 7.75 7.58579 7.75 8V15.25L11 15.25C11.4142 15.25 11.75 15.5858 11.75 16C11.75 16.4142 11.4142 16.75 11 16.75L7 16.75ZM13.25 16C13.25 16.4142 13.5858 16.75 14 16.75C14.4142 16.75 14.75 16.4142 14.75 16V13.0056L14.7501 13.0019C14.7504 12.9942 14.7512 12.9787 14.7531 12.9566C14.7569 12.9122 14.7651 12.8425 14.7823 12.7565C14.8173 12.5816 14.8862 12.3557 15.0181 12.1359C15.2528 11.7447 15.7541 11.25 17 11.25C17.4142 11.25 17.75 10.9142 17.75 10.5C17.75 10.0858 17.4142 9.75 17 9.75C16.0271 9.75 15.2865 9.98237 14.732 10.3359C14.6571 10.0006 14.3578 9.75 14 9.75C13.5858 9.75 13.25 10.0858 13.25 10.5V16Z" fill="currentColor"/>
</svg>
''',
      colorFilter:
          color != null ? widgets.ColorFilter.mode(color!, widgets.BlendMode.srcIn) : null,
      width: width,
      height: height,
    );