Fix freeze when restarting sketch with variables in size

JakubValtar · JakubValtar · commit 67453328bf18 · 2018-11-17T15:11:06.000+01:00
While sketch is running, rewriting sketch size to variables and trying to restart the sketch by pressing the play button causes PDE to freeze. Fixed by moving AWT call to EDT.
diff --git a/java/src/processing/mode/java/preproc/PdePreprocessor.java b/java/src/processing/mode/java/preproc/PdePreprocessor.java
@@ -27,6 +27,7 @@
 
 package processing.mode.java.preproc;
 
+import java.awt.*;
 import java.io.*;
 import java.util.*;
 import java.util.regex.MatchResult;
@@ -380,7 +381,9 @@ make sure that it uses numbers (or displayWidth/Height), copy into settings
           "The size of this sketch could not be determined from your code.\n" +
           "Use only numbers (not variables) for the size() command.\n" +
           "Read the size() reference for more details.";
-        Messages.showWarning("Could not find sketch size", message, null);
+        EventQueue.invokeLater(() -> {
+          Messages.showWarning("Could not find sketch size", message, null);
+        });
 //        new Exception().printStackTrace(System.out);
 //        return null;
         throw new SketchException("Please fix the size() line to continue.", false);
