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" stroke-width="1.5" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg">
<path d="M1 21V3C1 1.89543 1.89543 1 3 1H21C22.1046 1 23 1.89543 23 3V21C23 22.1046 22.1046 23 21 23H3C1.89543 23 1 22.1046 1 21Z" stroke="currentColor" stroke-width="1.5"/>
<path d="M15 7L17 7H19" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round"/>
<path d="M15 15.5H17L19 15.5" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round"/>
<path d="M15 18.5H17H19" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round"/>
<path d="M5 7H7M9 7H7M7 7V5M7 7V9" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round"/>
<path d="M5.58609 18.4142L7.0003 17M8.41452 15.5858L7.0003 17M7.0003 17L5.58609 15.5858M7.0003 17L8.41452 18.4142" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round"/>
</svg>
''',
      colorFilter:
          color != null ? widgets.ColorFilter.mode(color!, widgets.BlendMode.srcIn) : null,
      width: width,
      height: height,
    );