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 fill-rule="evenodd" clip-rule="evenodd" d="M14 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 34V19ZM16 25V28H20V25H16ZM16 33V30H20V33H16ZM22 33V30H26V33H22ZM28 33V30H32V33H28ZM28 25V28H32V25H28ZM22 28H26V25H22V28ZM16 23H32V20H16V23Z" fill="black"/>
<path fill-rule="evenodd" clip-rule="evenodd" d="M10 5C10 4.44772 10.4477 4 11 4H31C31.2652 4 31.5196 4.10536 31.7071 4.29289L37.7071 10.2929C37.8946 10.4804 38 10.7348 38 11V43C38 43.5523 37.5523 44 37 44H11C10.4477 44 10 43.5523 10 43V5ZM12 6V42H36V12H31C30.4477 12 30 11.5523 30 11V6H12ZM32 7.41421V10H34.5858L32 7.41421Z" fill="black"/>
</svg>
''',
      colorFilter:
          color != null ? widgets.ColorFilter.mode(color!, widgets.BlendMode.srcIn) : null,
      width: width,
      height: height,
    );