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" stroke-width="1.5" fill="none" xmlns="http://www.w3.org/2000/svg">
<path fill-rule="evenodd" clip-rule="evenodd" d="M2.25 5C2.25 2.92894 3.92894 1.25 6 1.25H18C20.0711 1.25 21.75 2.92894 21.75 5V7C21.75 9.07106 20.0711 10.75 18 10.75H6C3.92894 10.75 2.25 9.07106 2.25 7V5Z" fill="currentColor"/>
<path fill-rule="evenodd" clip-rule="evenodd" d="M3 15.25C3.41421 15.25 3.75 15.5858 3.75 16V18C3.75 19.7949 5.20508 21.25 7 21.25H17C18.7949 21.25 20.25 19.7949 20.25 18V16C20.25 15.5858 20.5858 15.25 21 15.25C21.4142 15.25 21.75 15.5858 21.75 16V18C21.75 20.6233 19.6233 22.75 17 22.75H7C4.37664 22.75 2.25 20.6233 2.25 18V16C2.25 15.5858 2.58579 15.25 3 15.25Z" fill="currentColor"/>
<path fill-rule="evenodd" clip-rule="evenodd" d="M12 9.25C12.4142 9.25 12.75 9.58579 12.75 10V16.1893L14.4697 14.4697C14.7626 14.1768 15.2374 14.1768 15.5303 14.4697C15.8232 14.7626 15.8232 15.2374 15.5303 15.5303L12.5303 18.5303C12.2374 18.8232 11.7626 18.8232 11.4697 18.5303L8.46967 15.5303C8.17678 15.2374 8.17678 14.7626 8.46967 14.4697C8.76256 14.1768 9.23744 14.1768 9.53033 14.4697L11.25 16.1893V10C11.25 9.58579 11.5858 9.25 12 9.25Z" fill="currentColor"/>
</svg>
''',
      colorFilter:
          color != null ? widgets.ColorFilter.mode(color!, widgets.BlendMode.srcIn) : null,
      width: width,
      height: height,
    );