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 fill-rule="evenodd" clip-rule="evenodd" d="M15.4697 5.53033C15.1768 5.23744 15.1768 4.76256 15.4697 4.46967L18.4697 1.46967C18.7626 1.17678 19.2374 1.17678 19.5303 1.46967C19.8232 1.76256 19.8232 2.23744 19.5303 2.53033L17.8107 4.25H22C22.4142 4.25 22.75 4.58579 22.75 5C22.75 5.41421 22.4142 5.75 22 5.75H17.8107L19.5303 7.46967C19.8232 7.76256 19.8232 8.23744 19.5303 8.53033C19.2374 8.82322 18.7626 8.82322 18.4697 8.53033L15.4697 5.53033Z" fill="currentColor"/>
<path fill-rule="evenodd" clip-rule="evenodd" d="M4.06343 1.25L7.81435 1.25C8.12672 1.25 8.40638 1.44361 8.51634 1.73599L9.97178 5.60588C10.02 5.73398 10.0322 5.87281 10.0071 6.00735L9.2778 9.91931C10.1742 12.0273 11.6548 13.4439 14.1104 14.7146L17.9754 13.9657C18.1126 13.9391 18.2545 13.9514 18.3851 14.0012L22.2669 15.4804C22.5577 15.5912 22.7498 15.87 22.7498 16.1812L22.7498 19.7655C22.7498 21.391 21.3176 22.7101 19.6424 22.3456C16.5888 21.6811 10.9315 19.9923 6.9695 16.0303C3.17436 12.2352 1.90282 6.99252 1.47478 4.15869C1.23055 2.54172 2.52735 1.25 4.06343 1.25Z" fill="currentColor"/>
</svg>
''',
      colorFilter:
          color != null ? widgets.ColorFilter.mode(color!, widgets.BlendMode.srcIn) : null,
      width: width,
      height: height,
    );