<?xml version="1.0" encoding="utf-8" ?>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml"><head>
<script type="text/javascript" language="JavaScript">
function reDo() {
if (innerWidth != origWidth || innerHeight != origHeight)
location.reload();
}
if ((parseInt(navigator.appVersion) == 4) && (navigator.appName == "Netscape")) {
origWidth = innerWidth;
origHeight = innerHeight;
onresize = reDo;
}
onerror = null;
</script>
<style type="text/css">
< !-- div.WebHelpPopupMenu {
position: absolute;
left: 0px;
top: 0px;
z-index: 4;
visibility: hidden;
}
p.WebHelpNavBar {
text-align: right;
}
-->
</style>
<script type="text/javascript">
gRootRelPath = "../../..";
gCommonRootRelPath = "../../..";
gTopicId = "9.2.14.0_9";
<script type="text/javascript" src="../../../template/scripts/rh.min.js"></script>
<script type="text/javascript" src="../../../template/scripts/common.min.js"></script>
<script type="text/javascript" src="../../../template/scripts/topic.min.js"></script>
<script type="text/javascript" src="../../../template/scripts/topicwidgets.min.js"></script>
<script type="text/javascript" src="../../../whxdata/projectsettings.js"></script>
<link rel="stylesheet" type="text/css" href="../../../template/styles/topic.min.css"/>
<link rel="stylesheet" type="text/css" href="../../../template/Charcoal_Grey/topicheader.css"/>
<meta name="topic-status" content="Draft"/>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
<title>clickable_exists</title>
<meta name="generator" content="Adobe RoboHelp 2019"/>
<link rel="stylesheet" href="../../../assets/css/default.css" type="text/css"/>
<meta name="rh-authors" content="Mark Alexander"/>
<meta name="topic-comment" content="Reference page for clickable_exists"/>
<meta name="rh-index-keywords" content="clickable_exists"/>
<meta name="search-keywords" content="clickable_exists"/>
</head>
<body>
<div class="topic-header rh-hide" id="rh-topic-header" onclick="rh._.goToFullLayout()">
<div class="logo">
</div>
<div class="nav">
<div class="title" title="clickable_exists">
<span>clickable_exists</span>
</div>
<div class="gotohome" title="Click here to see this page in full context">
<span>Click here to see this page in full context</span>
</div>
</div>
</div>
<div class="topic-header-shadow rh-hide" id="rh-topic-header-shadow"></div>
<h1>clickable_exists</h1>
<p>This function returns whether a clickable DOM icon has been created with the specified index exists or not. Please note, that the value used for checking <i>must have been initialised previously</i> or else you will get an error causing GameMaker Studio 2 to close.</p>
<p> </p>
<h4>Syntax:</h4>
<p class="code">clickable_exists(index);</p>
<table>
<tbody>
<tr>
<th>Argument</th>
<th>Description</th>
</tr>
<tr>
<td>index</td>
<td>The index of the clickable to check.</td>
</tr>
</tbody>
</table>
<p> </p>
<h4>Returns:</h4>
<p class="code">Boolean</p>
<p> </p>
<h4>Example:</h4>
<p class="code">if !clickable_exists(home_but)<br/> {
<br/> home_but = clickable_add(32, 32, sprite_get_tpe(spr_MS_Home, 0), "http://macsweeney_games.com", "_blank", "width=700, height=500, menubar=0, toolbar=0, scrollbars=0");<br/> }
</p>
<p>The above code checks the variable "home_but" to see if it already exists, and if it does not it creates a clickable DOM icon at the position (32, 32) of the page that the game canvas is running on. The icon uses the sprite referenced from
the texture page as "spr_MS_Home" and when clicked the icon will open a new window for the specified URL and with the defined properties for that window.</p>
<p> </p>
<p> </p>
<p> </p>
<div class="footer">
<div class="buttons">
<div class="clear">
<div style="float:left">Back: <a href="Web_And_HTML5.htm">Web And HTML5</a></div>
<div style="float:right">Next: <a href="clickable_add.htm">clickable_add</a></div>
</div>
</div>
<h5>© Copyright YoYo Games Ltd. 2020 All Rights Reserved</h5>
</div>
</body></html>