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="M4 16.5V20C4 21.1046 4.89543 22 6 22H18C19.1046 22 20 21.1046 20 20V16.5" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round"/>
<path d="M3 14V13C3 11.8954 3.89543 11 5 11H19C20.1046 11 21 11.8954 21 13V14" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round"/>
<path d="M12 8L12 11" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round"/>
<path d="M12 8C13.2624 8 14 7.03185 14 5.375C14 3.71815 12 2 12 2C12 2 10 3.71815 10 5.375C10 7.03185 10.7376 8 12 8Z" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round"/>
<path d="M9 14C9 15.6569 7.65685 17 6 17C4.34315 17 3 15.6569 3 14" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round"/>
<path d="M15 14C15 15.6569 13.6569 17 12 17C10.3431 17 9 15.6569 9 14" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round"/>
<path d="M21 14C21 15.6569 19.6569 17 18 17C16.3431 17 15 15.6569 15 14" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round"/>
</svg>
''',
      colorFilter:
          color != null ? widgets.ColorFilter.mode(color!, widgets.BlendMode.srcIn) : null,
      width: width,
      height: height,
    );