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(
      '''
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<path d="M24 40C24.4277 40 24.8515 39.9832 25.2708 39.9503C25.4361 40.6046 25.6961 41.2702 26.0995 41.8789C25.4108 41.9589 24.7102 42 24 42C14.0589 42 6 33.9411 6 24C6 14.0589 14.0589 6 24 6C33.9411 6 42 14.0589 42 24C42 24.586 41.972 25.1655 41.9173 25.7371C41.334 25.3681 40.6666 25.1263 39.9669 25.038C39.9888 24.6948 40 24.3487 40 24C40 15.1634 32.8366 8 24 8C15.1634 8 8 15.1634 8 24C8 32.8366 15.1634 40 24 40Z" fill="black"/>
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<path fill-rule="evenodd" clip-rule="evenodd" d="M40.1642 34.4119C41.9162 35.4293 42.5426 37.6211 41.5634 39.3074C40.5841 40.9937 38.37 41.536 36.618 40.5186C33.8422 38.9066 32.8396 34.2414 32.8396 34.2414C32.8396 34.2414 37.3885 32.8 40.1642 34.4119ZM39.1599 36.1414C40.0196 36.6407 40.2226 37.6337 39.8339 38.3031C39.4451 38.9725 38.4821 39.2883 37.6223 38.789C36.8044 38.314 36.0745 37.2424 35.5206 35.9747C35.4861 35.8959 35.453 35.8177 35.4211 35.7405C35.504 35.7299 35.5883 35.72 35.6739 35.7108C37.0494 35.5636 38.3419 35.6664 39.1599 36.1414Z" fill="black"/>
<path d="M17.2411 18.3488C17.5703 17.9651 18.1341 17.8875 18.5547 18.1679L21.5547 20.1679C21.8329 20.3534 22 20.6656 22 21C22 21.3344 21.8329 21.6466 21.5547 21.832L18.5547 23.8321C18.128 24.1165 17.5554 24.0321 17.2289 23.6367C16.9024 23.2413 16.9279 22.663 17.288 22.2978C17.6131 21.9682 18.0451 21.6391 18.3755 21.3875C18.4869 21.3026 18.5869 21.2264 18.6672 21.1621C18.7344 21.1083 18.7916 21.0606 18.8399 21.0183C18.7843 20.9697 18.7179 20.9144 18.6389 20.8512C18.5704 20.7963 18.4903 20.7344 18.4025 20.6665C18.0611 20.4024 17.6039 20.0489 17.2619 19.6747C16.9208 19.3015 16.9119 18.7325 17.2411 18.3488Z" fill="black"/>
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</svg>
''',
      colorFilter:
          color != null ? widgets.ColorFilter.mode(color!, widgets.BlendMode.srcIn) : null,
      width: width,
      height: height,
    );