finish getting pdex files to install, now with actual feedback

Author: benfry

app/src/processing/app/Base.java

@@ -1358,23 +1358,28 @@ public Editor handleOpen(String path) {
                 "only be installed from trusted sources.");
 
           if (result == JOptionPane.YES_OPTION) {
-            try {
-              editor.statusNotice("Installing " + baseName + "...");
-              editor.startIndeterminate();
-
-              // do the work of the actual install
-              LocalContribution contrib =
-                AvailableContribution.install(this, new File(path));
-
-              editor.stopIndeterminate();
-              editor.statusEmpty();
-
-              if (contrib == null) {
-                Messages.showWarning("Error During Installation", "Could not install contrib from " + path);
+            editor.statusNotice("Installing " + baseName + "...");
+            editor.startIndeterminate();
+
+            new Thread(() -> {
+              try {
+                // do the work of the actual install
+                LocalContribution contrib =
+                  AvailableContribution.install(this, new File(path));
+
+                EventQueue.invokeLater(() -> {
+                  editor.stopIndeterminate();
+
+                  if (contrib != null) {
+                    editor.statusEmpty();
+                  } else {
+                    editor.statusError("Could not install " + path);
+                  }
+                });
+              } catch (IOException e) {
+                EventQueue.invokeLater(() -> Messages.showWarning("Exception During Installation", "Could not install contrib from " + path, e));
               }
-            } catch (IOException e) {
-              Messages.showWarning("Exception During Installation", "Could not install contrib from " + path, e);
-            }
+            }).start();
           }
         }
       });

todo.txt

@@ -26,7 +26,8 @@ X update to JDK 11.0.12+7
 X rewrite download handler to just use a simple <get>
 _   remove the rest of the jre downloader code
 X initial code to install a contrib from a pdex file
-_   test to make sure it's behaving properly
+X   test to make sure it's behaving properly
+X   finish getting pdex files to install, now with actual feedback
 o handleNew() returns an Editor object
 o   unlikely to break anything, but it is a signature change
 X   nope, nevermind, not gonna do it