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PORuby Shoes and MySQL: GUI freezes, should I use threads?
 

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  1. PORuby Shoes and MySQL: GUI freezes, should I use threads?
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    <p>I'm trying to learn Shoes and decided to make a simple GUI to run a SQL-script line-by-line.</p> <p>My problem is that in GUI pressing the button, which executes my function, freezes the GUI for the time it takes the function to execute the script. </p> <p>With long scripts this might take several minutes.</p> <p>Someone had a similar problem (<a href="http://www.stackoverflow.com/questions/958662/shoes-and-heavy-operation-in-separate-thread">http://www.stackoverflow.com/questions/958662/shoes-and-heavy-operation-in-separate-thread</a>) and the suggestion was just to put intensive stuff under a Thread: if I copy the math-code from previously mentioned thread and replace my mysql-code the GUI works without freezing, so that probably hints to a problem with how I'm using the mysql-adapter?</p> <p>Below is a simplified version of the code:</p> <p>problem.rb:</p> <hr> <pre><code># copy the mysql-gem if not in gem-folder already Shoes.setup do gem 'mysql' end require "mysql" # the function that does the mysql stuff def someFunction con = Mysql::real_connect("myserver", "user", "pass", "db") scriptFile = File.open("myfile.sql", "r") script = scriptFile.read scriptFile.close result = [] script.each_line do |line| result &lt;&lt; con.query(line) end return result end # the Shoes app with the Thread Shoes.app do stack do button "Execute someFunction" do Thread.start do result = someFunction para "Done!" end end end stack do button "Can't click me when GUI is frozen" do alert "GUI wasn't frozen?" end end end </code></pre>
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