This patch improves the L&F of IDLE on OSX. The changes are conditionalized on

being in an IDLE.app bundle on darwin. This does a slight reorganisation of the
menus and adds support for file-open events.

Lib/idlelib/macosxSupport.py

@@ -0,0 +1,36 @@
+"""
+A number of function that enhance IDLE on MacOSX when it used as a normal
+GUI application (as opposed to an X11 application).
+"""
+import sys
+
+def runningAsOSXApp():
+    """ Returns True iff running from the IDLE.app bundle on OSX """
+    return (sys.platform == 'darwin' and 'IDLE.app' in sys.argv[0])
+
+def addOpenEventSupport(root, flist):
+    """
+    This ensures that the application will respont to open AppleEvents, which
+    makes is feaseable to use IDLE as the default application for python files.
+    """
+    def doOpenFile(*args):
+        for fn in args:
+            flist.open(fn)
+           
+    # The command below is a hook in aquatk that is called whenever the app
+    # receives a file open event. The callback can have multiple arguments,
+    # one for every file that should be opened.
+    root.createcommand("::tk::mac::OpenDocument", doOpenFile)
+
+def hideTkConsole(root):
+    root.tk.call('console', 'hide')
+
+
+def setupApp(root, flist):
+    """
+    Perform setup for the OSX application bundle.
+    """
+    if not runningAsOSXApp(): return
+
+    hideTkConsole(root)
+    addOpenEventSupport(root, flist)