<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE html> <html lang="en"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <!-- qaccessible.cpp --> <title>QAccessibleValueInterface Class | Qt GUI 5.12.6</title> <link rel="stylesheet" type="text/css" href="style/offline-simple.css" /> <script type="text/javascript"> document.getElementsByTagName("link").item(0).setAttribute("href", "style/offline.css"); // loading style sheet breaks anchors that were jumped to before // so force jumping to anchor again setTimeout(function() { var anchor = location.hash; // need to jump to different anchor first (e.g. none) location.hash = "#"; setTimeout(function() { location.hash = anchor; }, 0); }, 0); </script> </head> <body> <div class="header" id="qtdocheader"> <div class="main"> <div class="main-rounded"> <div class="navigationbar"> <table><tr> <td >Qt 5.12</td><td ><a href="qtgui-index.html">Qt GUI</a></td><td ><a href="qtgui-module.html">C++ Classes</a></td><td >QAccessibleValueInterface</td></tr></table><table class="buildversion"><tr> <td id="buildversion" width="100%" align="right"><a href="qtgui-index.html">Qt 5.12.6 Reference Documentation</a></td> </tr></table> </div> </div> <div class="content"> <div class="line"> <div class="content mainContent"> <div class="sidebar"> <div class="toc"> <h3><a name="toc">Contents</a></h3> <ul> <li class="level1"><a href="#public-functions">Public Functions</a></li> <li class="level1"><a href="#details">Detailed Description</a></li> </ul> </div> <div class="sidebar-content" id="sidebar-content"></div></div> <h1 class="title">QAccessibleValueInterface Class</h1> <!-- $$$QAccessibleValueInterface-brief --> <p>The <a href="qaccessiblevalueinterface.html">QAccessibleValueInterface</a> class implements support for objects that manipulate a value. <a href="#details">More...</a></p> <!-- @@@QAccessibleValueInterface --> <div class="table"><table class="alignedsummary"> <tr><td class="memItemLeft rightAlign topAlign"> Header:</td><td class="memItemRight bottomAlign"> <span class="preprocessor">#include <QAccessibleValueInterface></span> </td></tr><tr><td class="memItemLeft rightAlign topAlign"> qmake:</td><td class="memItemRight bottomAlign"> QT += gui</td></tr></table></div><ul> <li><a href="qaccessiblevalueinterface-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"> virtual </td><td class="memItemRight bottomAlign"><b><a href="qaccessiblevalueinterface.html#dtor.QAccessibleValueInterface">~QAccessibleValueInterface</a></b>()</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> virtual QVariant </td><td class="memItemRight bottomAlign"><b><a href="qaccessiblevalueinterface.html#currentValue">currentValue</a></b>() const = 0</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> virtual QVariant </td><td class="memItemRight bottomAlign"><b><a href="qaccessiblevalueinterface.html#maximumValue">maximumValue</a></b>() const = 0</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> virtual QVariant </td><td class="memItemRight bottomAlign"><b><a href="qaccessiblevalueinterface.html#minimumStepSize">minimumStepSize</a></b>() const = 0</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> virtual QVariant </td><td class="memItemRight bottomAlign"><b><a href="qaccessiblevalueinterface.html#minimumValue">minimumValue</a></b>() const = 0</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> virtual void </td><td class="memItemRight bottomAlign"><b><a href="qaccessiblevalueinterface.html#setCurrentValue">setCurrentValue</a></b>(const QVariant &<i>value</i>) = 0</td></tr> </table></div> <a name="details"></a> <!-- $$$QAccessibleValueInterface-description --> <div class="descr"> <h2 id="details">Detailed Description</h2> <p>The <a href="qaccessiblevalueinterface.html">QAccessibleValueInterface</a> class implements support for objects that manipulate a value.</p> <p>This interface should be implemented by accessible objects that represent a value. Examples are spinner, slider, dial and scroll bar.</p> <p>Instead of forcing the user to deal with the individual parts of the widgets, this interface gives an easier approach to the kind of widget it represents.</p> <p>Usually this interface is implemented by classes that also implement <a href="qaccessibleinterface.html">QAccessibleInterface</a>.</p> <p><a href="http://www.linux-foundation.org/en/Accessibility/IAccessible2">IAccessible2 Specification</a></p> </div> <!-- @@@QAccessibleValueInterface --> <div class="func"> <h2>Member Function Documentation</h2> <!-- $$$~QAccessibleValueInterface[overload1]$$$~QAccessibleValueInterface --> <h3 class="fn" id="dtor.QAccessibleValueInterface"><a name="dtor.QAccessibleValueInterface"></a><code>[virtual] </code>QAccessibleValueInterface::<span class="name">~QAccessibleValueInterface</span>()</h3> <p>Destroys the <a href="qaccessiblevalueinterface.html">QAccessibleValueInterface</a>.</p> <!-- @@@~QAccessibleValueInterface --> <!-- $$$currentValue[overload1]$$$currentValue --> <h3 class="fn" id="currentValue"><a name="currentValue"></a><code>[pure virtual] </code><span class="type"><a href="../qtcore/qvariant.html">QVariant</a></span> QAccessibleValueInterface::<span class="name">currentValue</span>() const</h3> <p>Returns the current value of the widget. This is usually a double or int.</p> <p><b>See also </b><a href="qaccessiblevalueinterface.html#setCurrentValue">setCurrentValue</a>().</p> <!-- @@@currentValue --> <!-- $$$maximumValue[overload1]$$$maximumValue --> <h3 class="fn" id="maximumValue"><a name="maximumValue"></a><code>[pure virtual] </code><span class="type"><a href="../qtcore/qvariant.html">QVariant</a></span> QAccessibleValueInterface::<span class="name">maximumValue</span>() const</h3> <p>Returns the maximum value this object accepts.</p> <p><b>See also </b><a href="qaccessiblevalueinterface.html#minimumValue">minimumValue</a>() and <a href="qaccessiblevalueinterface.html#currentValue">currentValue</a>().</p> <!-- @@@maximumValue --> <!-- $$$minimumStepSize[overload1]$$$minimumStepSize --> <h3 class="fn" id="minimumStepSize"><a name="minimumStepSize"></a><code>[pure virtual] </code><span class="type"><a href="../qtcore/qvariant.html">QVariant</a></span> QAccessibleValueInterface::<span class="name">minimumStepSize</span>() const</h3> <p>Returns the minimum step size for the accessible. This is the smalles increment that makes sense when changing the value. When programatically changing the value it should always be a multiple of the minimum step size.</p> <p>Some tools use this value even when the <a href="qaccessiblevalueinterface.html#setCurrentValue">setCurrentValue</a> does not perform any action. Progress bars for example are read-only but should return their range divided by 100.</p> <!-- @@@minimumStepSize --> <!-- $$$minimumValue[overload1]$$$minimumValue --> <h3 class="fn" id="minimumValue"><a name="minimumValue"></a><code>[pure virtual] </code><span class="type"><a href="../qtcore/qvariant.html">QVariant</a></span> QAccessibleValueInterface::<span class="name">minimumValue</span>() const</h3> <p>Returns the minimum value this object accepts.</p> <p><b>See also </b><a href="qaccessiblevalueinterface.html#maximumValue">maximumValue</a>() and <a href="qaccessiblevalueinterface.html#currentValue">currentValue</a>().</p> <!-- @@@minimumValue --> <!-- $$$setCurrentValue[overload1]$$$setCurrentValueconstQVariant& --> <h3 class="fn" id="setCurrentValue"><a name="setCurrentValue"></a><code>[pure virtual] </code><span class="type">void</span> QAccessibleValueInterface::<span class="name">setCurrentValue</span>(const <span class="type"><a href="../qtcore/qvariant.html">QVariant</a></span> &<i>value</i>)</h3> <p>Sets the <i>value</i>. If the desired <i>value</i> is out of the range of permissible values, this call will be ignored.</p> <p><b>See also </b><a href="qaccessiblevalueinterface.html#currentValue">currentValue</a>(), <a href="qaccessiblevalueinterface.html#minimumValue">minimumValue</a>(), and <a href="qaccessiblevalueinterface.html#maximumValue">maximumValue</a>().</p> <!-- @@@setCurrentValue --> </div> </div> </div> </div> </div> </div> <div class="footer"> <p> <acronym title="Copyright">©</acronym> 2019 The Qt Company Ltd. Documentation contributions included herein are the copyrights of their respective owners.<br/> The documentation provided herein is licensed under the terms of the <a href="http://www.gnu.org/licenses/fdl.html">GNU Free Documentation License version 1.3</a> as published by the Free Software Foundation.<br/> Qt and respective logos are trademarks of The Qt Company Ltd. in Finland and/or other countries worldwide. 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