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POIgnore auto repeat in X11 applications
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  1. POIgnore auto repeat in X11 applications
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    copied!<p>If you press and hold a key in X11 while <em>AutoRepeat</em> is enabled, you continuously receive <strong>KeyPress</strong> and <strong>KeyRelease</strong> events. I know that <em>AutoRepeat</em> can be disabled using the function <strong>XAutoRepeatOff()</strong>, but this changes the setting for the whole X server. Is there a way to either disable <em>AutoRepeat</em> for a single application or to ignore repeated keystrokes? </p> <p>What I'm looking for is a single <strong>KeyPress</strong> event when a key is pressed and a single <strong>KeyRelease</strong> event when a key is released, without interfering with the X server's <em>AutoRepeat</em> setting.</p> <p>Here's a minimal example to get you going (mostly from the <a href="http://www.xmission.com/~georgeps/documentation/tutorials/Xlib_Beginner.html" rel="noreferrer">Beginner Xlib Tutorial</a>):</p> <pre><code>#include &lt;stdio.h&gt; #include &lt;stdlib.h&gt; #include &lt;X11/Xlib.h&gt; #include &lt;X11/Xutil.h&gt; #include &lt;X11/Xos.h&gt; #include &lt;X11/Xatom.h&gt; #include &lt;X11/keysym.h&gt; Display *dis; Window win; XEvent report; int main () { dis = XOpenDisplay (NULL); // XAutoRepeatOn(dis); win = XCreateSimpleWindow (dis, RootWindow (dis, 0), 1, 1, 500, 500, 0, BlackPixel (dis, 0), BlackPixel (dis, 0)); XSelectInput (dis, win, KeyPressMask | KeyReleaseMask); XMapWindow (dis, win); XFlush (dis); while (1) { XNextEvent (dis, &amp;report); switch (report.type) { case KeyPress: fprintf (stdout, "key #%ld was pressed.\n", (long) XLookupKeysym (&amp;report.xkey, 0)); break; case KeyRelease: fprintf (stdout, "key #%ld was released.\n", (long) XLookupKeysym (&amp;report.xkey, 0)); break; } } return (0); } </code></pre>
 

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