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" stroke-width="1.5" fill="none" xmlns="http://www.w3.org/2000/svg">
<path d="M13 21H4C2.89543 21 2 20.1046 2 19V5C2 3.89543 2.89543 3 4 3H20C21.1046 3 22 3.89543 22 5V13" stroke="currentColor" stroke-linecap="round"/>
<path d="M22 17.2798C22 17.8812 21.7625 18.4588 21.3383 18.8861C20.3619 19.8701 19.415 20.8961 18.4021 21.8443C18.17 22.0585 17.8017 22.0507 17.5795 21.8268L14.6615 18.8861C13.7795 17.9972 13.7795 16.5623 14.6615 15.6734C15.5522 14.7758 17.0032 14.7758 17.8938 15.6734L17.9999 15.7803L18.1059 15.6734C18.533 15.2429 19.1146 15 19.7221 15C20.3297 15 20.9113 15.2428 21.3383 15.6734C21.7625 16.1007 22 16.6784 22 17.2798Z" stroke="currentColor" stroke-linejoin="round"/>
<path d="M2 7L22 7" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round"/>
<path d="M5 5.01L5.01 4.99889" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round"/>
<path d="M8 5.01L8.01 4.99889" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round"/>
<path d="M11 5.01L11.01 4.99889" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round"/>
</svg>
''',
      colorFilter:
          color != null ? widgets.ColorFilter.mode(color!, widgets.BlendMode.srcIn) : null,
      width: width,
      height: height,
    );