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  <title>buildTransitions method - NoAnimationMaterialPageRoute class - noAnimationMaterialPageRoute library - Dart API</title>
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    <h5>NoAnimationMaterialPageRoute class</h5>
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      <li class="section-title"><a href="ui_noAnimationMaterialPageRoute/NoAnimationMaterialPageRoute-class.html#constructors">Constructors</a></li>
      <li><a href="ui_noAnimationMaterialPageRoute/NoAnimationMaterialPageRoute/NoAnimationMaterialPageRoute.html">NoAnimationMaterialPageRoute</a></li>
    
      <li class="section-title inherited">
        <a href="ui_noAnimationMaterialPageRoute/NoAnimationMaterialPageRoute-class.html#instance-properties">Properties</a>
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      <li class="inherited"><a href="ui_noAnimationMaterialPageRoute/NoAnimationMaterialPageRoute/animation.html">animation</a></li>
      <li class="inherited"><a href="ui_noAnimationMaterialPageRoute/NoAnimationMaterialPageRoute/barrierColor.html">barrierColor</a></li>
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      <li class="inherited"><a href="ui_noAnimationMaterialPageRoute/NoAnimationMaterialPageRoute/builder.html">builder</a></li>
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      <li class="inherited"><a href="ui_noAnimationMaterialPageRoute/NoAnimationMaterialPageRoute/completed.html">completed</a></li>
      <li class="inherited"><a href="ui_noAnimationMaterialPageRoute/NoAnimationMaterialPageRoute/controller.html">controller</a></li>
      <li class="inherited"><a href="ui_noAnimationMaterialPageRoute/NoAnimationMaterialPageRoute/currentResult.html">currentResult</a></li>
      <li class="inherited"><a href="ui_noAnimationMaterialPageRoute/NoAnimationMaterialPageRoute/debugLabel.html">debugLabel</a></li>
      <li class="inherited"><a href="ui_noAnimationMaterialPageRoute/NoAnimationMaterialPageRoute/finishedWhenPopped.html">finishedWhenPopped</a></li>
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      <li class="inherited"><a href="ui_noAnimationMaterialPageRoute/NoAnimationMaterialPageRoute/hashCode.html">hashCode</a></li>
      <li class="inherited"><a href="ui_noAnimationMaterialPageRoute/NoAnimationMaterialPageRoute/hasScopedWillPopCallback.html">hasScopedWillPopCallback</a></li>
      <li class="inherited"><a href="ui_noAnimationMaterialPageRoute/NoAnimationMaterialPageRoute/isActive.html">isActive</a></li>
      <li class="inherited"><a href="ui_noAnimationMaterialPageRoute/NoAnimationMaterialPageRoute/isCurrent.html">isCurrent</a></li>
      <li class="inherited"><a href="ui_noAnimationMaterialPageRoute/NoAnimationMaterialPageRoute/isFirst.html">isFirst</a></li>
      <li class="inherited"><a href="ui_noAnimationMaterialPageRoute/NoAnimationMaterialPageRoute/maintainState.html">maintainState</a></li>
      <li class="inherited"><a href="ui_noAnimationMaterialPageRoute/NoAnimationMaterialPageRoute/navigator.html">navigator</a></li>
      <li class="inherited"><a href="ui_noAnimationMaterialPageRoute/NoAnimationMaterialPageRoute/offstage.html">offstage</a></li>
      <li class="inherited"><a href="ui_noAnimationMaterialPageRoute/NoAnimationMaterialPageRoute/opaque.html">opaque</a></li>
      <li class="inherited"><a href="ui_noAnimationMaterialPageRoute/NoAnimationMaterialPageRoute/overlayEntries.html">overlayEntries</a></li>
      <li class="inherited"><a href="ui_noAnimationMaterialPageRoute/NoAnimationMaterialPageRoute/popped.html">popped</a></li>
      <li class="inherited"><a href="ui_noAnimationMaterialPageRoute/NoAnimationMaterialPageRoute/runtimeType.html">runtimeType</a></li>
      <li class="inherited"><a href="ui_noAnimationMaterialPageRoute/NoAnimationMaterialPageRoute/secondaryAnimation.html">secondaryAnimation</a></li>
      <li class="inherited"><a href="ui_noAnimationMaterialPageRoute/NoAnimationMaterialPageRoute/semanticsDismissible.html">semanticsDismissible</a></li>
      <li class="inherited"><a href="ui_noAnimationMaterialPageRoute/NoAnimationMaterialPageRoute/settings.html">settings</a></li>
      <li class="inherited"><a href="ui_noAnimationMaterialPageRoute/NoAnimationMaterialPageRoute/subtreeContext.html">subtreeContext</a></li>
      <li class="inherited"><a href="ui_noAnimationMaterialPageRoute/NoAnimationMaterialPageRoute/transitionDuration.html">transitionDuration</a></li>
      <li class="inherited"><a href="ui_noAnimationMaterialPageRoute/NoAnimationMaterialPageRoute/willHandlePopInternally.html">willHandlePopInternally</a></li>
    
      <li class="section-title"><a href="ui_noAnimationMaterialPageRoute/NoAnimationMaterialPageRoute-class.html#instance-methods">Methods</a></li>
      <li><a href="ui_noAnimationMaterialPageRoute/NoAnimationMaterialPageRoute/buildTransitions.html">buildTransitions</a></li>
      <li class="inherited"><a href="ui_noAnimationMaterialPageRoute/NoAnimationMaterialPageRoute/addLocalHistoryEntry.html">addLocalHistoryEntry</a></li>
      <li class="inherited"><a href="ui_noAnimationMaterialPageRoute/NoAnimationMaterialPageRoute/addScopedWillPopCallback.html">addScopedWillPopCallback</a></li>
      <li class="inherited"><a href="ui_noAnimationMaterialPageRoute/NoAnimationMaterialPageRoute/buildPage.html">buildPage</a></li>
      <li class="inherited"><a href="ui_noAnimationMaterialPageRoute/NoAnimationMaterialPageRoute/canTransitionFrom.html">canTransitionFrom</a></li>
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      <li class="inherited"><a href="ui_noAnimationMaterialPageRoute/NoAnimationMaterialPageRoute/changedExternalState.html">changedExternalState</a></li>
      <li class="inherited"><a href="ui_noAnimationMaterialPageRoute/NoAnimationMaterialPageRoute/changedInternalState.html">changedInternalState</a></li>
      <li class="inherited"><a href="ui_noAnimationMaterialPageRoute/NoAnimationMaterialPageRoute/createAnimation.html">createAnimation</a></li>
      <li class="inherited"><a href="ui_noAnimationMaterialPageRoute/NoAnimationMaterialPageRoute/createAnimationController.html">createAnimationController</a></li>
      <li class="inherited"><a href="ui_noAnimationMaterialPageRoute/NoAnimationMaterialPageRoute/createOverlayEntries.html">createOverlayEntries</a></li>
      <li class="inherited"><a href="ui_noAnimationMaterialPageRoute/NoAnimationMaterialPageRoute/didChangeNext.html">didChangeNext</a></li>
      <li class="inherited"><a href="ui_noAnimationMaterialPageRoute/NoAnimationMaterialPageRoute/didChangePrevious.html">didChangePrevious</a></li>
      <li class="inherited"><a href="ui_noAnimationMaterialPageRoute/NoAnimationMaterialPageRoute/didComplete.html">didComplete</a></li>
      <li class="inherited"><a href="ui_noAnimationMaterialPageRoute/NoAnimationMaterialPageRoute/didPop.html">didPop</a></li>
      <li class="inherited"><a href="ui_noAnimationMaterialPageRoute/NoAnimationMaterialPageRoute/didPopNext.html">didPopNext</a></li>
      <li class="inherited"><a href="ui_noAnimationMaterialPageRoute/NoAnimationMaterialPageRoute/didPush.html">didPush</a></li>
      <li class="inherited"><a href="ui_noAnimationMaterialPageRoute/NoAnimationMaterialPageRoute/didReplace.html">didReplace</a></li>
      <li class="inherited"><a href="ui_noAnimationMaterialPageRoute/NoAnimationMaterialPageRoute/dispose.html">dispose</a></li>
      <li class="inherited"><a href="ui_noAnimationMaterialPageRoute/NoAnimationMaterialPageRoute/install.html">install</a></li>
      <li class="inherited"><a href="ui_noAnimationMaterialPageRoute/NoAnimationMaterialPageRoute/noSuchMethod.html">noSuchMethod</a></li>
      <li class="inherited"><a href="ui_noAnimationMaterialPageRoute/NoAnimationMaterialPageRoute/removeLocalHistoryEntry.html">removeLocalHistoryEntry</a></li>
      <li class="inherited"><a href="ui_noAnimationMaterialPageRoute/NoAnimationMaterialPageRoute/removeScopedWillPopCallback.html">removeScopedWillPopCallback</a></li>
      <li class="inherited"><a href="ui_noAnimationMaterialPageRoute/NoAnimationMaterialPageRoute/setState.html">setState</a></li>
      <li class="inherited"><a href="ui_noAnimationMaterialPageRoute/NoAnimationMaterialPageRoute/toString.html">toString</a></li>
      <li class="inherited"><a href="ui_noAnimationMaterialPageRoute/NoAnimationMaterialPageRoute/willPop.html">willPop</a></li>
    
      <li class="section-title inherited"><a href="ui_noAnimationMaterialPageRoute/NoAnimationMaterialPageRoute-class.html#operators">Operators</a></li>
      <li class="inherited"><a href="ui_noAnimationMaterialPageRoute/NoAnimationMaterialPageRoute/operator_equals.html">operator ==</a></li>
    
    
    </ol>
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    <h1>buildTransitions method</h1>

    <section class="multi-line-signature">
      <div>
        <ol class="annotation-list">
          <li>@override</li>
        </ol>
      </div>
      <span class="returntype">Widget</span>
      <span class="name ">buildTransitions</span>
(<wbr><span class="parameter" id="buildTransitions-param-context"><span class="type-annotation">BuildContext</span> <span class="parameter-name">context</span>, </span> <span class="parameter" id="buildTransitions-param-animation"><span class="type-annotation">Animation<span class="signature">&lt;<wbr><span class="type-parameter">double</span>&gt;</span></span> <span class="parameter-name">animation</span>, </span> <span class="parameter" id="buildTransitions-param-secondaryAnimation"><span class="type-annotation">Animation<span class="signature">&lt;<wbr><span class="type-parameter">double</span>&gt;</span></span> <span class="parameter-name">secondaryAnimation</span>, </span> <span class="parameter" id="buildTransitions-param-child"><span class="type-annotation">Widget</span> <span class="parameter-name">child</span></span>)
      
    </section>
    <section class="desc markdown">
      <p>Override this method to wrap the <code>child</code> with one or more transition
widgets that define how the route arrives on and leaves the screen.</p>
<p>By default, the child (which contains the widget returned by <a href="ui_noAnimationMaterialPageRoute/NoAnimationMaterialPageRoute/buildPage.html">buildPage</a>)
is not wrapped in any transition widgets.</p>
<p>The <a href="ui_noAnimationMaterialPageRoute/NoAnimationMaterialPageRoute/buildTransitions.html">buildTransitions</a> method, in contrast to <a href="ui_noAnimationMaterialPageRoute/NoAnimationMaterialPageRoute/buildPage.html">buildPage</a>, is called each
time the <code>Route</code>'s state changes (e.g. the value of <a href="ui_noAnimationMaterialPageRoute/NoAnimationMaterialPageRoute/canPop.html">canPop</a>).</p>
<p>The <a href="ui_noAnimationMaterialPageRoute/NoAnimationMaterialPageRoute/buildTransitions.html">buildTransitions</a> method is typically used to define transitions
that animate the new topmost route's comings and goings. When the
<code>Navigator</code> pushes a route on the top of its stack, the new route's
primary <code>animation</code> runs from 0.0 to 1.0. When the Navigator pops the
topmost route, e.g. because the use pressed the back button, the
primary animation runs from 1.0 to 0.0.</p>
<p>The following example uses the primary animation to drive a
<code>SlideTransition</code> that translates the top of the new route vertically
from the bottom of the screen when it is pushed on the Navigator's
stack. When the route is popped the SlideTransition translates the
route from the top of the screen back to the bottom.</p>
<pre class="language-dart"><code class="language-dart">PageRouteBuilder(
  pageBuilder: (BuildContext context,
      Animation&lt;double&gt; animation,
      Animation&lt;double&gt; secondaryAnimation,
      Widget child,
  ) {
    return Scaffold(
      appBar: AppBar(title: Text('Hello')),
      body: Center(
        child: Text('Hello World'),
      ),
    );
  },
  transitionsBuilder: (
      BuildContext context,
      Animation&lt;double&gt; animation,
      Animation&lt;double&gt; secondaryAnimation,
      Widget child,
   ) {
    return SlideTransition(
      position: Tween&lt;Offset&gt;(
        begin: const Offset(0.0, 1.0),
        end: Offset.zero,
      ).animate(animation),
      child: child, // child is the value returned by pageBuilder
    );
  },
);
</code></pre>
<p>We've used <code>PageRouteBuilder</code> to demonstrate the <a href="ui_noAnimationMaterialPageRoute/NoAnimationMaterialPageRoute/buildTransitions.html">buildTransitions</a> method
here. The body of an override of the <a href="ui_noAnimationMaterialPageRoute/NoAnimationMaterialPageRoute/buildTransitions.html">buildTransitions</a> method would be
defined in the same way.</p>
<p>When the <code>Navigator</code> pushes a route on the top of its stack, the
<code>secondaryAnimation</code> can be used to define how the route that was on
the top of the stack leaves the screen. Similarly when the topmost route
is popped, the secondaryAnimation can be used to define how the route
below it reappears on the screen. When the Navigator pushes a new route
on the top of its stack, the old topmost route's secondaryAnimation
runs from 0.0 to 1.0. When the Navigator pops the topmost route, the
secondaryAnimation for the route below it runs from 1.0 to 0.0.</p>
<p>The example below adds a transition that's driven by the
<code>secondaryAnimation</code>. When this route disappears because a new route has
been pushed on top of it, it translates in the opposite direction of
the new route. Likewise when the route is exposed because the topmost
route has been popped off.</p>
<pre class="language-dart"><code class="language-dart">  transitionsBuilder: (
      BuildContext context,
      Animation&lt;double&gt; animation,
      Animation&lt;double&gt; secondaryAnimation,
      Widget child,
  ) {
    return SlideTransition(
      position: AlignmentTween(
        begin: const Offset(0.0, 1.0),
        end: Offset.zero,
      ).animate(animation),
      child: SlideTransition(
        position: TweenOffset(
          begin: Offset.zero,
          end: const Offset(0.0, 1.0),
        ).animate(secondaryAnimation),
        child: child,
      ),
    );
  }
</code></pre>
<p>In practice the <code>secondaryAnimation</code> is used pretty rarely.</p>
<p>The arguments to this method are as follows:</p><ul><li><code>context</code>: The context in which the route is being built.</li><li><code>animation</code>: When the <code>Navigator</code> pushes a route on the top of its stack,
the new route's primary <code>animation</code> runs from 0.0 to 1.0. When the <code>Navigator</code>
pops the topmost route this animation runs from 1.0 to 0.0.</li><li><code>secondaryAnimation</code>: When the Navigator pushes a new route
on the top of its stack, the old topmost route's <code>secondaryAnimation</code>
runs from 0.0 to 1.0. When the <code>Navigator</code> pops the topmost route, the
<code>secondaryAnimation</code> for the route below it runs from 1.0 to 0.0.</li><li><code>child</code>, the page contents, as returned by <a href="ui_noAnimationMaterialPageRoute/NoAnimationMaterialPageRoute/buildPage.html">buildPage</a>.</li></ul>
<p>See also:</p><ul><li><a href="ui_noAnimationMaterialPageRoute/NoAnimationMaterialPageRoute/buildPage.html">buildPage</a>, which is used to describe the actual contents of the page,
and whose result is passed to the <code>child</code> argument of this method.</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 buildTransitions(BuildContext context, Animation&lt;double&gt; animation,
    Animation&lt;double&gt; secondaryAnimation, Widget child) {
  return child;
}</code></pre>
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