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 d="M19 21C19 19.3431 20.3431 18 22 18H26C27.6569 18 29 19.3431 29 21V39C29 40.6569 27.6569 42 26 42H22C20.3431 42 19 40.6569 19 39V21Z" fill="black"/>
<path d="M6 33C6 31.3431 7.34315 30 9 30H13C14.6569 30 16 31.3431 16 33V39C16 40.6569 14.6569 42 13 42H9C7.34315 42 6 40.6569 6 39V33Z" fill="black"/>
<path fill-rule="evenodd" clip-rule="evenodd" d="M32 9C32 7.34315 33.3431 6 35 6H39C40.6569 6 42 7.34315 42 9V39C42 40.6569 40.6569 42 39 42H35C33.3431 42 32 40.6569 32 39V9ZM35 8C34.4477 8 34 8.44772 34 9V39C34 39.5523 34.4477 40 35 40H39C39.5523 40 40 39.5523 40 39V9C40 8.44772 39.5523 8 39 8H35Z" fill="black"/>
</svg>
''',
      colorFilter:
          color != null ? widgets.ColorFilter.mode(color!, widgets.BlendMode.srcIn) : null,
      width: width,
      height: height,
    );