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="48" height="48" viewBox="0 0 48 48" fill="none" xmlns="http://www.w3.org/2000/svg">
<path d="M16 20V23H32V20H16Z" fill="black"/>
<path d="M16 28V25H20V28H16Z" fill="black"/>
<path d="M16 30V33H20V30H16Z" fill="black"/>
<path d="M22 30V33H26V30H22Z" fill="black"/>
<path d="M28 30V33H32V30H28Z" fill="black"/>
<path d="M28 28V25H32V28H28Z" fill="black"/>
<path d="M26 28H22V25H26V28Z" fill="black"/>
<path fill-rule="evenodd" clip-rule="evenodd" d="M30 4H11C10.4477 4 10 4.44772 10 5V43C10 43.5523 10.4477 44 11 44H37C37.5523 44 38 43.5523 38 43V12H31C30.4477 12 30 11.5523 30 11V4ZM14 19C14 18.4477 14.4477 18 15 18H33C33.5523 18 34 18.4477 34 19V34C34 34.5523 33.5523 35 33 35H15C14.4477 35 14 34.5523 14 34V19Z" fill="black"/>
<path d="M37.4142 10H32V4.58579L37.4142 10Z" fill="black"/>
</svg>
''',
      colorFilter:
          color != null ? widgets.ColorFilter.mode(color!, widgets.BlendMode.srcIn) : null,
      width: width,
      height: height,
    );