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" fill="none" xmlns="http://www.w3.org/2000/svg">
<path fill-rule="evenodd" clip-rule="evenodd" d="M3.6 2.25C2.85442 2.25 2.25 2.85441 2.25 3.6V20.4C2.25 21.1456 2.85441 21.75 3.6 21.75H20.4C21.1456 21.75 21.75 21.1456 21.75 20.4V3.6C21.75 2.85442 21.1456 2.25 20.4 2.25H3.6ZM10.25 10.4C10.25 9.46073 10.9749 8.75 11.8077 8.75C12.6405 8.75 13.3654 9.46073 13.3654 10.4C13.3654 10.7213 13.2793 11.0178 13.1324 11.2683C12.67 12.057 11.6782 13.0782 10.7378 13.9441C10.2789 14.3665 9.85144 14.7348 9.53856 14.9976C9.3823 15.1289 9.2551 15.2334 9.16743 15.3047C9.12361 15.3404 9.0897 15.3677 9.06701 15.3859L9.04159 15.4063L9.0355 15.4111L9.03417 15.4122L9.034 15.4123L9.03394 15.4124C8.78395 15.6107 8.68678 15.9454 8.79175 16.2467C8.89672 16.5481 9.18089 16.75 9.5 16.75H14.5C14.9142 16.75 15.25 16.4142 15.25 16C15.25 15.5858 14.9142 15.25 14.5 15.25H11.5319C11.6048 15.1841 11.6789 15.1165 11.7537 15.0476C12.6904 14.1853 13.8383 13.0302 14.4265 12.027C14.7059 11.5504 14.8654 10.9926 14.8654 10.4C14.8654 8.6883 13.5239 7.25 11.8077 7.25C10.0915 7.25 8.75 8.6883 8.75 10.4V10.8C8.75 11.2142 9.08579 11.55 9.5 11.55C9.91421 11.55 10.25 11.2142 10.25 10.8V10.4Z" fill="currentColor"/>
</svg>
''',
      colorFilter:
          color != null ? widgets.ColorFilter.mode(color!, widgets.BlendMode.srcIn) : null,
      width: width,
      height: height,
    );