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- <h1>build method</h1>
-
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- <ol class="annotation-list">
- <li>@override</li>
- </ol>
- </div>
- <span class="returntype">Widget</span>
- <span class="name ">build</span>
- (<wbr><span class="parameter" id="build-param-context"><span class="type-annotation">BuildContext</span> <span class="parameter-name">context</span></span>)
-
- </section>
- <section class="desc markdown">
- <p>Describes the part of the user interface represented by this widget.</p>
- <p>The framework calls this method when this widget is inserted into the
- tree in a given <code>BuildContext</code> and when the dependencies of this widget
- change (e.g., an <code>InheritedWidget</code> referenced by this widget changes).</p>
- <p>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 <code>Widget.canUpdate</code>.</p>
- <p>Typically implementations return a newly created constellation of widgets
- that are configured with information from this widget's constructor and
- from the given <code>BuildContext</code>.</p>
- <p>The given <code>BuildContext</code> 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 <code>BuildContext</code>
- 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.</p>
- <p>The implementation of this method must only depend on:</p><ul><li>the fields of the widget, which themselves must not change over time,
- and</li><li>any ambient state obtained from the <code>context</code> using
- <code>BuildContext.inheritFromWidgetOfExactType</code>.</li></ul>
- <p>If a widget's <a href="ui_home_uiComponents/Button/build.html">build</a> method is to depend on anything else, use a
- <code>StatefulWidget</code> instead.</p>
- <p>See also:</p><ul><li>The discussion on performance considerations at <code>StatelessWidget</code>.</li></ul>
- </section>
-
- <section class="summary source-code" id="source">
- <h2><span>Implementation</span> </h2>
- <pre class="language-dart"><code class="language-dart">@override
- Widget build(BuildContext context) {
- return Hero(
- tag: 'SearchHero',
- child: Padding(
- padding: const EdgeInsets.all(8.0),
- child: RaisedButton(
- color: Theme.of(context).accentColor,
- shape: StadiumBorder(),
- onPressed: () {
- Navigator.push(
- context,
- NoAnimationMaterialPageRoute(
- builder: (context) =>
- PageTouchPoints(title: 'TouchPoints')));
- },
- child: Text(
- 'Search and Connect Touchpad',
- style: TextStyle(color: Colors.white),
- ),
- ),
- ),
- );
- }</code></pre>
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