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 fill-rule="evenodd" clip-rule="evenodd" d="M18.5 6C10.4919 6 4 12.4919 4 20.5C4 38.5 28 42 28 42V35H29.5C37.5081 35 44 28.5081 44 20.5C44 12.4919 37.5081 6 29.5 6H18.5ZM24 23.5C25.3807 23.5 26.5 22.3807 26.5 21C26.5 19.6193 25.3807 18.5 24 18.5C22.6193 18.5 21.5 19.6193 21.5 21C21.5 22.3807 22.6193 23.5 24 23.5ZM34.5 21C34.5 22.3807 33.3807 23.5 32 23.5C30.6193 23.5 29.5 22.3807 29.5 21C29.5 19.6193 30.6193 18.5 32 18.5C33.3807 18.5 34.5 19.6193 34.5 21ZM16 23.5C17.3807 23.5 18.5 22.3807 18.5 21C18.5 19.6193 17.3807 18.5 16 18.5C14.6193 18.5 13.5 19.6193 13.5 21C13.5 22.3807 14.6193 23.5 16 23.5Z" fill="black"/>
</svg>
''',
      colorFilter:
          color != null ? widgets.ColorFilter.mode(color!, widgets.BlendMode.srcIn) : null,
      width: width,
      height: height,
    );