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="M4 11.4998L3.51493 11.6211C2.62459 11.8437 2 12.6436 2 13.5614V15.4382C2 16.356 2.62459 17.1559 3.51493 17.3785L5.25448 17.8134C5.63317 17.9081 6 17.6217 6 17.2313V11.7683C6 11.3779 5.63317 11.0915 5.25448 11.1862L4 11.4998ZM4 11.4998V11C4 6.58172 7.58172 3 12 3C16.4183 3 20 6.58172 20 11V11.4998M20 11.4998L20.4851 11.6211C21.3754 11.8437 22 12.6436 22 13.5614V15.4382C22 16.356 21.3754 17.1559 20.4851 17.3785L20 17.4998M20 11.4998L18.7455 11.1862C18.3668 11.0915 18 11.3779 18 11.7683V17.2313C18 17.6217 18.3668 17.9081 18.7455 17.8134L20 17.4998M15 20.5H18C19.1046 20.5 20 19.6046 20 18.5V18V17.4998M15 20.5C15 19.6716 14.3284 19 13.5 19H10.5C9.67157 19 9 19.6716 9 20.5C9 21.3284 9.67157 22 10.5 22H13.5C14.3284 22 15 21.3284 15 20.5Z" stroke="currentColor" stroke-width="1.5"/>
</svg>
''',
      colorFilter:
          color != null ? widgets.ColorFilter.mode(color!, widgets.BlendMode.srcIn) : null,
      width: width,
      height: height,
    );