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" stroke-width="1.5" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg">
<path d="M19.7781 4.04337C17.7007 2.08074 14.9382 1 12 1C9.0618 1 6.29934 2.08089 4.2217 4.04337C2.14423 6.00617 1 8.61557 1 11.3911C1 11.7274 1.28853 12 1.64437 12C2.00038 12 2.28891 11.7274 2.28891 11.3911C2.28891 10.3784 3.16123 9.55439 4.23328 9.55439C6.12573 9.55439 5.43138 12 6.82219 12C8.21299 12 7.51871 9.55439 9.41109 9.55439C11.3035 9.55439 12 12 12 12C12 12 12.6965 9.55439 14.5889 9.55439C16.4813 9.55439 15.988 12 17.1778 12C18.3677 12 17.8743 9.55439 19.7667 9.55439C20.8388 9.55439 21.7111 10.3784 21.7111 11.3911C21.7111 11.7274 21.9996 12 22.3556 12C22.7115 12 23 11.7274 23 11.3911C23 8.61557 21.8559 6.00617 19.7781 4.04337Z" stroke="currentColor" stroke-width="1.5"/>
<path d="M12 12C12 12 12 16.0948 12 20C12 24 6 24 6 20" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round"/>
</svg>
''',
      colorFilter:
          color != null ? widgets.ColorFilter.mode(color!, widgets.BlendMode.srcIn) : null,
      width: width,
      height: height,
    );