build method
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="M7.14286 16.9953C6.75006 16.9953 6.36756 16.9525 6 16.8715C3.70973 16.3665 2 14.3761 2 11.9977C2 9.284 4.22573 7.07548 7 7.00195" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round"/>
<path d="M13.3184 9.63429C12.7858 8.73635 11.9737 7.96977 11 7.4989" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round"/>
<path d="M16.8571 6.99999C17.2499 6.99999 17.6324 7.04278 18 7.12383C20.2903 7.62884 22 9.6192 22 11.9976C22 14.7577 19.6975 16.9952 16.8571 16.9952C16.581 16.9952 15.4776 16.9952 15.1429 16.9952C12.317 16.9952 10 14.4893 10 11.9976C10 11.9976 10 11 10.5 10.5" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round"/>
<path d="M3 3L21 21" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round"/>
</svg>
''',
colorFilter:
color != null ? widgets.ColorFilter.mode(color!, widgets.BlendMode.srcIn) : null,
width: width,
height: height,
);