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="48" height="48" viewBox="0 0 48 48" fill="none" xmlns="http://www.w3.org/2000/svg">
<path fill-rule="evenodd" clip-rule="evenodd" d="M44.0702 3.86707V29.6925L43.9987 29.8713C41.3977 36.374 37.1274 39.5499 32.9524 40.1764C29.4659 40.6995 26.1124 39.4113 24.168 36.9201C22.2565 39.4261 18.8266 40.6949 15.2866 40.1769C11.0285 39.5538 6.62918 36.39 4.02172 29.8713L3.9502 29.6925V3.97563L21.1517 20.2662C21.2671 20.208 21.3944 20.1471 21.5316 20.0861C22.15 19.8112 23.0486 19.4999 24.0002 19.4999C24.9518 19.4999 25.8504 19.8112 26.4688 20.0861C26.6053 20.1468 26.7319 20.2074 26.8468 20.2652L44.0702 3.86707ZM24.2002 33.2C25.3048 33.2 26.2002 32.1909 26.2002 31.2645C26.2002 30.3381 25.3048 29.2 24.2002 29.2C23.0956 29.2 22.2002 30.3381 22.2002 31.2645C22.2002 32.1909 23.0956 33.2 24.2002 33.2Z" fill="black"/>
</svg>
''',
colorFilter:
color != null ? widgets.ColorFilter.mode(color!, widgets.BlendMode.srcIn) : null,
width: width,
height: height,
);