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mq-b--cxx_lib/SFML-2.6.1/doc/html/classsf_1_1Touch.html
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wehub-resource-sync e7ae061fa2 chore: import upstream snapshot with attribution
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<li class="navelem"><b>sf</b></li><li class="navelem"><a class="el" href="classsf_1_1Touch.html">Touch</a></li> </ul>
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<a href="#pub-static-methods">Static Public Member Functions</a> &#124;
<a href="classsf_1_1Touch-members.html">List of all members</a> </div>
<div class="headertitle"><div class="title">sf::Touch Class Reference<div class="ingroups"><a class="el" href="group__window.html">Window module</a></div></div></div>
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<p>Give access to the real-time state of the touches.
<a href="classsf_1_1Touch.html#details">More...</a></p>
<p><code>#include &lt;<a class="el" href="Touch_8hpp_source.html">SFML/Window/Touch.hpp</a>&gt;</code></p>
<table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a id="pub-static-methods" name="pub-static-methods"></a>
Static Public Member Functions</h2></td></tr>
<tr class="memitem:a2f85297123ea4e401d02c346e50d48a3"><td class="memItemLeft" align="right" valign="top">static bool&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classsf_1_1Touch.html#a2f85297123ea4e401d02c346e50d48a3">isDown</a> (unsigned int finger)</td></tr>
<tr class="memdesc:a2f85297123ea4e401d02c346e50d48a3"><td class="mdescLeft">&#160;</td><td class="mdescRight">Check if a touch event is currently down. <br /></td></tr>
<tr class="separator:a2f85297123ea4e401d02c346e50d48a3"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:af1b7035be709091c7475075e43e2bc23"><td class="memItemLeft" align="right" valign="top">static <a class="el" href="classsf_1_1Vector2.html">Vector2i</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classsf_1_1Touch.html#af1b7035be709091c7475075e43e2bc23">getPosition</a> (unsigned int finger)</td></tr>
<tr class="memdesc:af1b7035be709091c7475075e43e2bc23"><td class="mdescLeft">&#160;</td><td class="mdescRight">Get the current position of a touch in desktop coordinates. <br /></td></tr>
<tr class="separator:af1b7035be709091c7475075e43e2bc23"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a8a1456574d2825d4249fcf72f11d4398"><td class="memItemLeft" align="right" valign="top">static <a class="el" href="classsf_1_1Vector2.html">Vector2i</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classsf_1_1Touch.html#a8a1456574d2825d4249fcf72f11d4398">getPosition</a> (unsigned int finger, const <a class="el" href="classsf_1_1WindowBase.html">WindowBase</a> &amp;relativeTo)</td></tr>
<tr class="memdesc:a8a1456574d2825d4249fcf72f11d4398"><td class="mdescLeft">&#160;</td><td class="mdescRight">Get the current position of a touch in window coordinates. <br /></td></tr>
<tr class="separator:a8a1456574d2825d4249fcf72f11d4398"><td class="memSeparator" colspan="2">&#160;</td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><p>Give access to the real-time state of the touches. </p>
<p><a class="el" href="classsf_1_1Touch.html" title="Give access to the real-time state of the touches.">sf::Touch</a> provides an interface to the state of the touches.</p>
<p>It only contains static functions, so it's not meant to be instantiated.</p>
<p>This class allows users to query the touches state at any time and directly, without having to deal with a window and its events. Compared to the TouchBegan, TouchMoved and TouchEnded events, <a class="el" href="classsf_1_1Touch.html" title="Give access to the real-time state of the touches.">sf::Touch</a> can retrieve the state of the touches at any time (you don't need to store and update a boolean on your side in order to know if a touch is down), and you always get the real state of the touches, even if they happen when your window is out of focus and no event is triggered.</p>
<p>The getPosition function can be used to retrieve the current position of a touch. There are two versions: one that operates in global coordinates (relative to the desktop) and one that operates in window coordinates (relative to a specific window).</p>
<p>Touches are identified by an index (the "finger"), so that in multi-touch events, individual touches can be tracked correctly. As long as a finger touches the screen, it will keep the same index even if other fingers start or stop touching the screen in the meantime. As a consequence, active touch indices may not always be sequential (i.e. touch number 0 may be released while touch number 1 is still down).</p>
<p>Usage example: </p><div class="fragment"><div class="line"><span class="keywordflow">if</span> (<a class="code hl_function" href="classsf_1_1Touch.html#a2f85297123ea4e401d02c346e50d48a3">sf::Touch::isDown</a>(0))</div>
<div class="line">{</div>
<div class="line"> <span class="comment">// touch 0 is down</span></div>
<div class="line">}</div>
<div class="line"> </div>
<div class="line"><span class="comment">// get global position of touch 1</span></div>
<div class="line"><a class="code hl_class" href="classsf_1_1Vector2.html">sf::Vector2i</a> globalPos = <a class="code hl_function" href="classsf_1_1Touch.html#af1b7035be709091c7475075e43e2bc23">sf::Touch::getPosition</a>(1);</div>
<div class="line"> </div>
<div class="line"><span class="comment">// get position of touch 1 relative to a window</span></div>
<div class="line"><a class="code hl_class" href="classsf_1_1Vector2.html">sf::Vector2i</a> relativePos = <a class="code hl_function" href="classsf_1_1Touch.html#af1b7035be709091c7475075e43e2bc23">sf::Touch::getPosition</a>(1, window);</div>
<div class="ttc" id="aclasssf_1_1Touch_html_a2f85297123ea4e401d02c346e50d48a3"><div class="ttname"><a href="classsf_1_1Touch.html#a2f85297123ea4e401d02c346e50d48a3">sf::Touch::isDown</a></div><div class="ttdeci">static bool isDown(unsigned int finger)</div><div class="ttdoc">Check if a touch event is currently down.</div></div>
<div class="ttc" id="aclasssf_1_1Touch_html_af1b7035be709091c7475075e43e2bc23"><div class="ttname"><a href="classsf_1_1Touch.html#af1b7035be709091c7475075e43e2bc23">sf::Touch::getPosition</a></div><div class="ttdeci">static Vector2i getPosition(unsigned int finger)</div><div class="ttdoc">Get the current position of a touch in desktop coordinates.</div></div>
<div class="ttc" id="aclasssf_1_1Vector2_html"><div class="ttname"><a href="classsf_1_1Vector2.html">sf::Vector2</a></div><div class="ttdoc">Utility template class for manipulating 2-dimensional vectors.</div><div class="ttdef"><b>Definition:</b> <a href="Vector2_8hpp_source.html#l00037">Vector2.hpp:38</a></div></div>
</div><!-- fragment --><dl class="section see"><dt>See also</dt><dd><a class="el" href="classsf_1_1Joystick.html" title="Give access to the real-time state of the joysticks.">sf::Joystick</a>, <a class="el" href="classsf_1_1Keyboard.html" title="Give access to the real-time state of the keyboard.">sf::Keyboard</a>, <a class="el" href="classsf_1_1Mouse.html" title="Give access to the real-time state of the mouse.">sf::Mouse</a> </dd></dl>
<p class="definition">Definition at line <a class="el" href="Touch_8hpp_source.html#l00043">43</a> of file <a class="el" href="Touch_8hpp_source.html">Touch.hpp</a>.</p>
</div><h2 class="groupheader">Member Function Documentation</h2>
<a id="af1b7035be709091c7475075e43e2bc23" name="af1b7035be709091c7475075e43e2bc23"></a>
<h2 class="memtitle"><span class="permalink"><a href="#af1b7035be709091c7475075e43e2bc23">&#9670;&#160;</a></span>getPosition() <span class="overload">[1/2]</span></h2>
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<td class="memname">static <a class="el" href="classsf_1_1Vector2.html">Vector2i</a> sf::Touch::getPosition </td>
<td>(</td>
<td class="paramtype">unsigned int&#160;</td>
<td class="paramname"><em>finger</em></td><td>)</td>
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<p>Get the current position of a touch in desktop coordinates. </p>
<p>This function returns the current touch position in global (desktop) coordinates.</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">finger</td><td>Finger index</td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>Current position of <em>finger</em>, or undefined if it's not down </dd></dl>
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<h2 class="memtitle"><span class="permalink"><a href="#a8a1456574d2825d4249fcf72f11d4398">&#9670;&#160;</a></span>getPosition() <span class="overload">[2/2]</span></h2>
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<td class="memname">static <a class="el" href="classsf_1_1Vector2.html">Vector2i</a> sf::Touch::getPosition </td>
<td>(</td>
<td class="paramtype">unsigned int&#160;</td>
<td class="paramname"><em>finger</em>, </td>
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<td class="paramtype">const <a class="el" href="classsf_1_1WindowBase.html">WindowBase</a> &amp;&#160;</td>
<td class="paramname"><em>relativeTo</em>&#160;</td>
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<p>Get the current position of a touch in window coordinates. </p>
<p>This function returns the current touch position relative to the given window.</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">finger</td><td>Finger index </td></tr>
<tr><td class="paramname">relativeTo</td><td>Reference window</td></tr>
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</dd>
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<dl class="section return"><dt>Returns</dt><dd>Current position of <em>finger</em>, or undefined if it's not down </dd></dl>
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<h2 class="memtitle"><span class="permalink"><a href="#a2f85297123ea4e401d02c346e50d48a3">&#9670;&#160;</a></span>isDown()</h2>
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<td class="memname">static bool sf::Touch::isDown </td>
<td>(</td>
<td class="paramtype">unsigned int&#160;</td>
<td class="paramname"><em>finger</em></td><td>)</td>
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<p>Check if a touch event is currently down. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">finger</td><td>Finger index</td></tr>
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</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>True if <em>finger</em> is currently touching the screen, false otherwise </dd></dl>
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<hr/>The documentation for this class was generated from the following file:<ul>
<li><a class="el" href="Touch_8hpp_source.html">Touch.hpp</a></li>
</ul>
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