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" stroke-width="1.5" height="24" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg">
<path d="M9.00001 21L8.00001 21C6.89544 21 6.00001 20.1057 6.00001 19.0011C6.00001 17.4501 6.00001 15.3443 6 14C6 13 4.5 12 4.5 12C4.5 12 6.00001 11 6.00001 10C6.00001 8.827 6.00001 6.62207 6.00001 4.99914C6.00001 3.89457 6.89544 3 8.00001 3L9.00001 3" stroke="currentColor"  stroke-linecap="round" stroke-linejoin="round"/>
<path d="M15 21L16 21C17.1046 21 18 20.1057 18 19.0011C18 17.4501 18 15.3443 18 14C18 13 19.5 12 19.5 12C19.5 12 18 11 18 10C18 8.827 18 6.62207 18 4.99914C18 3.89457 17.1046 3 16 3L15 3" stroke="currentColor"  stroke-linecap="round" stroke-linejoin="round"/>
</svg>
''',
      colorFilter:
          color != null ? widgets.ColorFilter.mode(color!, widgets.BlendMode.srcIn) : null,
      width: width,
      height: height,
    );