133 lines
6.9 KiB
HTML
Executable File
133 lines
6.9 KiB
HTML
Executable File
<!DOCTYPE html>
|
|
<html lang="en">
|
|
<head>
|
|
<meta charset="utf-8">
|
|
<meta http-equiv="X-UA-Compatible" content="IE=edge">
|
|
<meta name="viewport" content="width=device-width, initial-scale=1">
|
|
<meta name="description" content="API docs for the shouldRebuildSemantics method from the TouchPainter class, for the Dart programming language.">
|
|
<title>shouldRebuildSemantics method - TouchPainter class - TouchPainter library - Dart API</title>
|
|
<!-- required because all the links are pseudo-absolute -->
|
|
<base href="../..">
|
|
|
|
<link href="https://fonts.googleapis.com/css?family=Source+Code+Pro:500,400i,400,300|Source+Sans+Pro:400,300,700" rel="stylesheet">
|
|
<link rel="stylesheet" href="static-assets/github.css">
|
|
<link rel="stylesheet" href="static-assets/styles.css">
|
|
<link rel="icon" href="static-assets/favicon.png">
|
|
|
|
</head>
|
|
|
|
<body>
|
|
|
|
<div id="overlay-under-drawer"></div>
|
|
|
|
<header id="title">
|
|
<button id="sidenav-left-toggle" type="button"> </button>
|
|
<ol class="breadcrumbs gt-separated dark hidden-xs">
|
|
<li><a href="index.html">touch_demonstrator</a></li>
|
|
<li><a href="ui_home_TouchPainter/ui_home_TouchPainter-library.html">TouchPainter</a></li>
|
|
<li><a href="ui_home_TouchPainter/TouchPainter-class.html">TouchPainter</a></li>
|
|
<li class="self-crumb">shouldRebuildSemantics method</li>
|
|
</ol>
|
|
<div class="self-name">shouldRebuildSemantics</div>
|
|
<form class="search navbar-right" role="search">
|
|
<input type="text" id="search-box" autocomplete="off" disabled class="form-control typeahead" placeholder="Loading search...">
|
|
</form>
|
|
</header>
|
|
|
|
<main>
|
|
|
|
<div class="col-xs-6 col-sm-3 col-md-2 sidebar sidebar-offcanvas-left">
|
|
<h5>TouchPainter class</h5>
|
|
<ol>
|
|
<li class="section-title"><a href="ui_home_TouchPainter/TouchPainter-class.html#constructors">Constructors</a></li>
|
|
<li><a href="ui_home_TouchPainter/TouchPainter/TouchPainter.html">TouchPainter</a></li>
|
|
|
|
<li class="section-title">
|
|
<a href="ui_home_TouchPainter/TouchPainter-class.html#instance-properties">Properties</a>
|
|
</li>
|
|
<li><a href="ui_home_TouchPainter/TouchPainter/context.html">context</a></li>
|
|
<li><a href="ui_home_TouchPainter/TouchPainter/touchCollection.html">touchCollection</a></li>
|
|
<li><a href="ui_home_TouchPainter/TouchPainter/width.html">width</a></li>
|
|
<li class="inherited"><a href="ui_home_TouchPainter/TouchPainter/hashCode.html">hashCode</a></li>
|
|
<li class="inherited"><a href="ui_home_TouchPainter/TouchPainter/runtimeType.html">runtimeType</a></li>
|
|
<li class="inherited"><a href="ui_home_TouchPainter/TouchPainter/semanticsBuilder.html">semanticsBuilder</a></li>
|
|
|
|
<li class="section-title"><a href="ui_home_TouchPainter/TouchPainter-class.html#instance-methods">Methods</a></li>
|
|
<li><a href="ui_home_TouchPainter/TouchPainter/paint.html">paint</a></li>
|
|
<li><a href="ui_home_TouchPainter/TouchPainter/shouldRepaint.html">shouldRepaint</a></li>
|
|
<li class="inherited"><a href="ui_home_TouchPainter/TouchPainter/addListener.html">addListener</a></li>
|
|
<li class="inherited"><a href="ui_home_TouchPainter/TouchPainter/hitTest.html">hitTest</a></li>
|
|
<li class="inherited"><a href="ui_home_TouchPainter/TouchPainter/noSuchMethod.html">noSuchMethod</a></li>
|
|
<li class="inherited"><a href="ui_home_TouchPainter/TouchPainter/removeListener.html">removeListener</a></li>
|
|
<li class="inherited"><a href="ui_home_TouchPainter/TouchPainter/shouldRebuildSemantics.html">shouldRebuildSemantics</a></li>
|
|
<li class="inherited"><a href="ui_home_TouchPainter/TouchPainter/toString.html">toString</a></li>
|
|
|
|
<li class="section-title inherited"><a href="ui_home_TouchPainter/TouchPainter-class.html#operators">Operators</a></li>
|
|
<li class="inherited"><a href="ui_home_TouchPainter/TouchPainter/operator_equals.html">operator ==</a></li>
|
|
|
|
<li class="section-title"><a href="ui_home_TouchPainter/TouchPainter-class.html#static-properties">Static properties</a></li>
|
|
<li><a href="ui_home_TouchPainter/TouchPainter/buttonPressed.html">buttonPressed</a></li>
|
|
<li><a href="ui_home_TouchPainter/TouchPainter/buttonReleased.html">buttonReleased</a></li>
|
|
|
|
|
|
</ol>
|
|
</div><!--/.sidebar-offcanvas-->
|
|
|
|
<div class="col-xs-12 col-sm-9 col-md-8 main-content">
|
|
<h1>shouldRebuildSemantics method</h1>
|
|
|
|
<section class="multi-line-signature">
|
|
<span class="returntype">bool</span>
|
|
<span class="name ">shouldRebuildSemantics</span>
|
|
(<wbr><span class="parameter" id="shouldRebuildSemantics-param-oldDelegate"><span>covariant</span> <span class="type-annotation">CustomPainter</span> <span class="parameter-name">oldDelegate</span></span>)
|
|
<div class="features">inherited</div>
|
|
</section>
|
|
<section class="desc markdown">
|
|
<p>Called whenever a new instance of the custom painter delegate class is
|
|
provided to the <code>RenderCustomPaint</code> object, or any time that a new
|
|
<code>CustomPaint</code> object is created with a new instance of the custom painter
|
|
delegate class (which amounts to the same thing, because the latter is
|
|
implemented in terms of the former).</p>
|
|
<p>If the new instance would cause <a href="ui_home_TouchPainter/TouchPainter/semanticsBuilder.html">semanticsBuilder</a> to create different
|
|
semantics information, then this method should return true, otherwise it
|
|
should return false.</p>
|
|
<p>If the method returns false, then the <a href="ui_home_TouchPainter/TouchPainter/semanticsBuilder.html">semanticsBuilder</a> call might be
|
|
optimized away.</p>
|
|
<p>It's possible that the <a href="ui_home_TouchPainter/TouchPainter/semanticsBuilder.html">semanticsBuilder</a> will get called even if
|
|
<a href="ui_home_TouchPainter/TouchPainter/shouldRebuildSemantics.html">shouldRebuildSemantics</a> would return false. For example, it is called
|
|
when the <code>CustomPaint</code> is rendered for the very first time, or when the
|
|
box changes its size.</p>
|
|
<p>By default this method delegates to <a href="ui_home_TouchPainter/TouchPainter/shouldRepaint.html">shouldRepaint</a> under the assumption
|
|
that in most cases semantics change when something new is drawn.</p>
|
|
</section>
|
|
|
|
<section class="summary source-code" id="source">
|
|
<h2><span>Implementation</span> </h2>
|
|
<pre class="language-dart"><code class="language-dart">bool shouldRebuildSemantics(covariant CustomPainter oldDelegate) => shouldRepaint(oldDelegate);</code></pre>
|
|
</section>
|
|
|
|
</div> <!-- /.main-content -->
|
|
|
|
<div class="col-xs-6 col-sm-6 col-md-2 sidebar sidebar-offcanvas-right">
|
|
</div><!--/.sidebar-offcanvas-->
|
|
|
|
</main>
|
|
|
|
<footer>
|
|
<span class="no-break">
|
|
touch_demonstrator 1.0.0+1
|
|
</span>
|
|
|
|
</footer>
|
|
|
|
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
|
|
<script src="static-assets/typeahead.bundle.min.js"></script>
|
|
<script src="static-assets/highlight.pack.js"></script>
|
|
<script src="static-assets/URI.js"></script>
|
|
<script src="static-assets/script.js"></script>
|
|
|
|
|
|
</body>
|
|
|
|
</html>
|