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" stroke-width="1.5" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg">
<path d="M8 17C7.72386 17 7.5 16.7761 7.5 16.5C7.5 16.2239 7.72386 16 8 16C8.27614 16 8.5 16.2239 8.5 16.5C8.5 16.7761 8.27614 17 8 17Z" fill="currentColor" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round"/>
<path d="M12 17C11.7239 17 11.5 16.7761 11.5 16.5C11.5 16.2239 11.7239 16 12 16C12.2761 16 12.5 16.2239 12.5 16.5C12.5 16.7761 12.2761 17 12 17Z" fill="currentColor" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round"/>
<path d="M16 17C15.7239 17 15.5 16.7761 15.5 16.5C15.5 16.2239 15.7239 16 16 16C16.2761 16 16.5 16.2239 16.5 16.5C16.5 16.7761 16.2761 17 16 17Z" fill="currentColor" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round"/>
<path d="M21 21H3C2.44772 21 2 20.5523 2 20L2 4C2 3.44772 2.44772 3 3 3H21C21.5523 3 22 3.44772 22 4V20C22 20.5523 21.5523 21 21 21Z" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round"/>
<path d="M2 17.5L4 16.5" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round"/>
<path d="M22 17.5L20 16.5" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round"/>
</svg>
''',
      colorFilter:
          color != null ? widgets.ColorFilter.mode(color!, widgets.BlendMode.srcIn) : null,
      width: width,
      height: height,
    );