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<link title="Netsmtp" rel="Chapter" href="Netsmtp.html"><title>Ocamlnet 2 Reference Manual : Uq_tcl.tcl_event_system</title>
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<div class="navbar"> <a href="Uq_tcl.html">Up</a>
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<center><h1>Class <a href="type_Uq_tcl.tcl_event_system.html">Uq_tcl.tcl_event_system</a></h1></center>
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<pre><span class="keyword">class</span> <a name="TYPEtcl_event_system"></a>tcl_event_system : <code class="type">?run:<a href="Uq_tcl.html#TYPErunner">runner</a> -> unit -> </code><code class="type"><a href="Unixqueue.event_system.html">Unixqueue.event_system</a></code></pre>This class is an alternate implementation of the Unixqueue event systems
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for the TCL event loop. Use this class instead of <code class="code">unix_event_system</code>.
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Both Unixqueue and TCL provide event queues for system events,
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and it is possible to merge both queues such that events may happen and
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be processed on one queue while the other queue blocks.
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To achieve this, just use this class instead of <code class="code">unix_event_system</code>.
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It automatically creates handlers for the TCL loop when necessary.
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However, you must not invoke the method <code class="code">run</code>, as this class does not
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provide its own event loop. Instead, ensure that <code class="code">Tk.mainLoop</code> is
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Of course, this is all intended to help writing applications which have
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a graphical user interface (GUI) built with labltk, and some network
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functionality which is designed to work in the background. Simply create
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your GUI with labltk, and after the button is pressed which starts the
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network I/O, you add resources to this event queue, and the I/O will be
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processed concurrently with any user input coming from the GUI.
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Note: The implementation is not thread-safe (and neither TCL).<br>
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