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POInteracting with actors in scala swing applications
 

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    <p>I'm writing a small application in scala. The application processes simple log files. Because the processing takes some time, I've decided to let my application core extend Actor. </p> <pre><code>class Application extends Actor { def react() { loop { react { case Process(file) =&gt; // do something interesting with file... } } } } </code></pre> <p>The processing of a log file is triggered by clicking a button in the gui. The gui uses scala swing. </p> <pre><code>object Gui extends SimpleSwingApplication { val application = new Application().start() def top = new MainFrame { val startButton = new Button reactions += { case ButtonClicked(`startButton`) =&gt; application ! Process(file) } } } </code></pre> <p>Now, the application core needs to notify the gui about the current progress. </p> <pre><code> sender ! Progress(value) // whenever progress is made </code></pre> <p>I've solved this by creating a separate actor inside the gui. The actor is executed inside the edt thread. It listens to messages from the application core and updates the gui. </p> <pre><code> object Gui extends SimpleSwingApplication { val actor = new Actor { override val scheduler = new SchedulerAdapter { def execute(fun: =&gt; Unit) { Swing.onEDT(fun) } } start() def act() { loop { react { case ForwardToApplication(message) =&gt; application ! message case Progress(value) =&gt; progressBar.value = value } } } } } </code></pre> <p>Since the application core needs to know about the sender of the message, I also use this actor to forward messages from the gui to the application core, making my actor the new sender.</p> <pre><code> reactions += { case ButtonClicked(`startButton`) =&gt; actor ! ForwardToApplication(Process(file)) } </code></pre> <p>This code works just fine. My question: Is there a simpler way to do this? It whould be nice to simple use the reactions mechanism for my application messages: </p> <pre><code> reactions += { case Progress(value) =&gt; progressBar.value = value } </code></pre> <p>Any ideas how to achieve this?</p>
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