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 d="M11 8.5L9.8 9L2.35172 12.3856C2.13752 12.4829 2 12.6965 2 12.9318V13.0682C2 13.3035 2.13752 13.5171 2.35172 13.6144L11.1724 17.6238C11.6982 17.8628 12.3018 17.8628 12.8276 17.6238L21.6483 13.6144C21.8625 13.5171 22 13.3035 22 13.0682V12.9318C22 12.6965 21.8625 12.4829 21.6483 12.3856L14.2 9L13 8.5" stroke="currentColor" />
<path d="M22 13V17.112C22 17.3482 21.8615 17.5623 21.6462 17.6592L12.8207 21.6307C12.2988 21.8655 11.7012 21.8655 11.1793 21.6307L2.35378 17.6592C2.13847 17.5623 2 17.3482 2 17.112V13" stroke="currentColor" />
<path d="M12 8C10.3431 8 9 6.65685 9 5C9 3.34315 10.3431 2 12 2C13.6569 2 15 3.34315 15 5C15 6.65685 13.6569 8 12 8Z" stroke="currentColor"  stroke-linecap="round" stroke-linejoin="round"/>
<path d="M11 8V13C11 13.5523 11.4477 14 12 14V14C12.5523 14 13 13.5523 13 13V8" stroke="currentColor" />
<path d="M16 13H17" stroke="currentColor"  stroke-linecap="round" stroke-linejoin="round"/>
</svg>
''',
      colorFilter:
          color != null ? widgets.ColorFilter.mode(color!, widgets.BlendMode.srcIn) : null,
      width: width,
      height: height,
    );