build method

  1. @override
Widget build(
  1. BuildContext context
)
override

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:

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="M24.507 10.1381C24.1941 9.95398 23.8059 9.95398 23.493 10.1381L5.63105 20.6451L6.64509 22.369L24 12.1602L41.3549 22.369L42.369 20.6451L36 16.8986V12C36 11.4477 35.5523 11 35 11H32C31.4477 11 31 11.4477 31 12V13.9575L24.507 10.1381Z" fill="black"/>
<path d="M14 25H25V31H14V25Z" fill="black"/>
<path fill-rule="evenodd" clip-rule="evenodd" d="M24 14L10 22V36H5C4.44772 36 4 36.4477 4 37C4 37.5523 4.44772 38 5 38H41C41.5523 38 42 37.5523 42 37C42 36.4477 41.5523 36 41 36H38V22L24 14ZM24 16.3035L12 23.1606V36H28V25H34V36H36V23.1606L24 16.3035Z" fill="black"/>
</svg>
''',
      colorFilter:
          color != null ? widgets.ColorFilter.mode(color!, widgets.BlendMode.srcIn) : null,
      width: width,
      height: height,
    );