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
Widget build(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="M4 13.5V13C4 8.02944 7.58172 4 12 4C16.4183 4 20 8.02944 20 13V13.5" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round"/>
<path d="M2 17.4385V15.5616C2 14.6439 2.62459 13.8439 3.51493 13.6213L4 13.5L5.25448 13.1864C5.63317 13.0918 6 13.3782 6 13.7685V19.2316C6 19.6219 5.63317 19.9083 5.25448 19.8137L3.51493 19.3788C2.62459 19.1562 2 18.3562 2 17.4385Z" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round"/>
<path d="M22 17.4385V15.5616C22 14.6439 21.3754 13.8439 20.4851 13.6213L20 13.5L18.7455 13.1864C18.3668 13.0918 18 13.3782 18 13.7685V19.2316C18 19.6219 18.3668 19.9083 18.7455 19.8137L20.4851 19.3788C21.3754 19.1562 22 18.3562 22 17.4385Z" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round"/>
</svg>
''',
      colorFilter:
          color != null ? ColorFilter.mode(color!, BlendMode.srcIn) : null,
      width: width,
      height: height,
    );