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<td >Qt 5.12</td><td ><a href="qtqml-index.html">Qt QML</a></td><td ><a href="qtqml-module.html">C++ Classes</a></td><td >QQmlScriptString</td></tr></table><table class="buildversion"><tr>
<td id="buildversion" width="100%" align="right"><a href="qtqml-index.html">Qt 5.12.6 Reference Documentation</a></td>
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<h3><a name="toc">Contents</a></h3>
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<li class="level1"><a href="#public-functions">Public Functions</a></li>
<li class="level1"><a href="#details">Detailed Description</a></li>
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<h1 class="title">QQmlScriptString Class</h1>
<!-- $$$QQmlScriptString-brief -->
<p>The <a href="qqmlscriptstring.html">QQmlScriptString</a> class encapsulates a script and its context. <a href="#details">More...</a></p>
<!-- @@@QQmlScriptString -->
<div class="table"><table class="alignedsummary">
<tr><td class="memItemLeft rightAlign topAlign"> Header:</td><td class="memItemRight bottomAlign">   <span class="preprocessor">#include &lt;QQmlScriptString&gt;</span>
</td></tr><tr><td class="memItemLeft rightAlign topAlign"> qmake:</td><td class="memItemRight bottomAlign"> QT += qml</td></tr></table></div><ul>
<li><a href="qqmlscriptstring-members.html">List of all members, including inherited members</a></li>
</ul>
<a name="public-functions"></a>
<h2 id="public-functions">Public Functions</h2>
<div class="table"><table class="alignedsummary">
<tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="qqmlscriptstring.html#QQmlScriptString">QQmlScriptString</a></b>()</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="qqmlscriptstring.html#QQmlScriptString-1">QQmlScriptString</a></b>(const QQmlScriptString &amp;<i>other</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> bool </td><td class="memItemRight bottomAlign"><b><a href="qqmlscriptstring.html#booleanLiteral">booleanLiteral</a></b>(bool *<i>ok</i>) const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> bool </td><td class="memItemRight bottomAlign"><b><a href="qqmlscriptstring.html#isEmpty">isEmpty</a></b>() const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> bool </td><td class="memItemRight bottomAlign"><b><a href="qqmlscriptstring.html#isNullLiteral">isNullLiteral</a></b>() const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> bool </td><td class="memItemRight bottomAlign"><b><a href="qqmlscriptstring.html#isUndefinedLiteral">isUndefinedLiteral</a></b>() const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> qreal </td><td class="memItemRight bottomAlign"><b><a href="qqmlscriptstring.html#numberLiteral">numberLiteral</a></b>(bool *<i>ok</i>) const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> QString </td><td class="memItemRight bottomAlign"><b><a href="qqmlscriptstring.html#stringLiteral">stringLiteral</a></b>() const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> bool </td><td class="memItemRight bottomAlign"><b><a href="qqmlscriptstring.html#operator-not-eq">operator!=</a></b>(const QQmlScriptString &amp;<i>other</i>) const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> QQmlScriptString &amp;</td><td class="memItemRight bottomAlign"><b><a href="qqmlscriptstring.html#operator-eq">operator=</a></b>(const QQmlScriptString &amp;<i>other</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> bool </td><td class="memItemRight bottomAlign"><b><a href="qqmlscriptstring.html#operator-eq-eq">operator==</a></b>(const QQmlScriptString &amp;<i>other</i>) const</td></tr>
</table></div>
<a name="details"></a>
<!-- $$$QQmlScriptString-description -->
<div class="descr">
<h2 id="details">Detailed Description</h2>
<p>The <a href="qqmlscriptstring.html">QQmlScriptString</a> class encapsulates a script and its context.</p>
<p><a href="qqmlscriptstring.html">QQmlScriptString</a> is used to create QObject properties that accept a script &quot;assignment&quot; from QML.</p>
<p>Normally, the following QML would result in a binding being established for the <code>script</code> property; i.e&#x2e; <code>script</code> would be assigned the value obtained from running <code>myObj.value = Math.max(myValue, 100)</code></p>
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<p>If instead the property had a type of <a href="qqmlscriptstring.html">QQmlScriptString</a>, the script itself -- <i>myObj.value = Math.max(myValue, 100)</i> -- would be passed to the <code>script</code> property and the class could choose how to handle it. Typically, the class will evaluate the script at some later time using a <a href="qqmlexpression.html">QQmlExpression</a>.</p>
<pre class="cpp">

  <span class="type"><a href="qqmlexpression.html">QQmlExpression</a></span> expr(scriptString);
  expr<span class="operator">.</span>evaluate();

</pre>
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<p><b>See also </b><a href="qqmlexpression.html">QQmlExpression</a>.</p>
<!-- @@@QQmlScriptString -->
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<h2>Member Function Documentation</h2>
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<h3 class="fn" id="QQmlScriptString"><a name="QQmlScriptString"></a>QQmlScriptString::<span class="name">QQmlScriptString</span>()</h3>
<p>Constructs an empty instance.</p>
<!-- @@@QQmlScriptString -->
<!-- $$$QQmlScriptString$$$QQmlScriptStringconstQQmlScriptString& -->
<h3 class="fn" id="QQmlScriptString-1"><a name="QQmlScriptString-1"></a>QQmlScriptString::<span class="name">QQmlScriptString</span>(const <span class="type"><a href="qqmlscriptstring.html#QQmlScriptString">QQmlScriptString</a></span> &amp;<i>other</i>)</h3>
<p>Copies <i>other</i>.</p>
<!-- @@@QQmlScriptString -->
<!-- $$$booleanLiteral[overload1]$$$booleanLiteralbool* -->
<h3 class="fn" id="booleanLiteral"><a name="booleanLiteral"></a><span class="type">bool</span> QQmlScriptString::<span class="name">booleanLiteral</span>(<span class="type">bool</span> *<i>ok</i>) const</h3>
<p>If the content of the <a href="qqmlscriptstring.html">QQmlScriptString</a> is a boolean literal, returns the boolean value and sets <i>ok</i> to true. Otherwise returns false and sets <i>ok</i> to false.</p>
<!-- @@@booleanLiteral -->
<!-- $$$isEmpty[overload1]$$$isEmpty -->
<h3 class="fn" id="isEmpty"><a name="isEmpty"></a><span class="type">bool</span> QQmlScriptString::<span class="name">isEmpty</span>() const</h3>
<p>Returns whether the <a href="qqmlscriptstring.html">QQmlScriptString</a> is empty.</p>
<!-- @@@isEmpty -->
<!-- $$$isNullLiteral[overload1]$$$isNullLiteral -->
<h3 class="fn" id="isNullLiteral"><a name="isNullLiteral"></a><span class="type">bool</span> QQmlScriptString::<span class="name">isNullLiteral</span>() const</h3>
<p>Returns whether the content of the <a href="qqmlscriptstring.html">QQmlScriptString</a> is the <code>null</code> literal.</p>
<!-- @@@isNullLiteral -->
<!-- $$$isUndefinedLiteral[overload1]$$$isUndefinedLiteral -->
<h3 class="fn" id="isUndefinedLiteral"><a name="isUndefinedLiteral"></a><span class="type">bool</span> QQmlScriptString::<span class="name">isUndefinedLiteral</span>() const</h3>
<p>Returns whether the content of the <a href="qqmlscriptstring.html">QQmlScriptString</a> is the <code>undefined</code> literal.</p>
<!-- @@@isUndefinedLiteral -->
<!-- $$$numberLiteral[overload1]$$$numberLiteralbool* -->
<h3 class="fn" id="numberLiteral"><a name="numberLiteral"></a><span class="type">qreal</span> QQmlScriptString::<span class="name">numberLiteral</span>(<span class="type">bool</span> *<i>ok</i>) const</h3>
<p>If the content of the <a href="qqmlscriptstring.html">QQmlScriptString</a> is a number literal, returns that number and sets <i>ok</i> to true. Otherwise returns 0.0 and sets <i>ok</i> to false.</p>
<!-- @@@numberLiteral -->
<!-- $$$stringLiteral[overload1]$$$stringLiteral -->
<h3 class="fn" id="stringLiteral"><a name="stringLiteral"></a><span class="type">QString</span> QQmlScriptString::<span class="name">stringLiteral</span>() const</h3>
<p>If the content of the <a href="qqmlscriptstring.html">QQmlScriptString</a> is a string literal, returns that string. Otherwise returns a null QString.</p>
<!-- @@@stringLiteral -->
<!-- $$$operator!=[overload1]$$$operator!=constQQmlScriptString& -->
<h3 class="fn" id="operator-not-eq"><a name="operator-not-eq"></a><span class="type">bool</span> QQmlScriptString::<span class="name">operator!=</span>(const <span class="type"><a href="qqmlscriptstring.html#QQmlScriptString">QQmlScriptString</a></span> &amp;<i>other</i>) const</h3>
<p>Returns <code>true</code> if this and the <i>other</i> <a href="qqmlscriptstring.html">QQmlScriptString</a> objects are different.</p>
<p><b>See also </b><a href="qqmlscriptstring.html#operator-eq-eq">operator==</a>().</p>
<!-- @@@operator!= -->
<!-- $$$operator=[overload1]$$$operator=constQQmlScriptString& -->
<h3 class="fn" id="operator-eq"><a name="operator-eq"></a><span class="type"><a href="qqmlscriptstring.html#QQmlScriptString">QQmlScriptString</a></span> &amp;QQmlScriptString::<span class="name">operator=</span>(const <span class="type"><a href="qqmlscriptstring.html#QQmlScriptString">QQmlScriptString</a></span> &amp;<i>other</i>)</h3>
<p>Assigns <i>other</i> to this.</p>
<!-- @@@operator= -->
<!-- $$$operator==[overload1]$$$operator==constQQmlScriptString& -->
<h3 class="fn" id="operator-eq-eq"><a name="operator-eq-eq"></a><span class="type">bool</span> QQmlScriptString::<span class="name">operator==</span>(const <span class="type"><a href="qqmlscriptstring.html#QQmlScriptString">QQmlScriptString</a></span> &amp;<i>other</i>) const</h3>
<p>Returns <code>true</code> if this and the <i>other</i> <a href="qqmlscriptstring.html">QQmlScriptString</a> objects are equal.</p>
<p><b>See also </b><a href="qqmlscriptstring.html#operator-not-eq">operator!=</a>().</p>
<!-- @@@operator== -->
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