Add beginnings of a graphical listener.

1 files changed, 44 insertions, 0 deletions

diff --git a/MLKListenerController.m b/MLKListenerController.m
new file mode 100644
index 0000000..c43aff9
--- /dev/null
+++ b/MLKListenerController.m
@@ -0,0 +1,44 @@
+/* -*- mode: objc; coding: utf-8 -*- */
+/* Toilet Lisp, a Common Lisp subset for the Étoilé runtime.
+ * Copyright (C) 2008  Matthias Andreas Benkard.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or (at
+ * your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#import "MLKListenerController.h"
+#import "MLKReader.h"
+
+@implementation MLKListenerController
+- (IBAction)submit:(id)sender
+{
+  id object;
+  NSString *input = [inputField stringValue];
+
+  NS_DURING
+    {
+      object = [MLKReader readFromString:input];
+    }
+  NS_HANDLER
+    {
+      // A parsing error.  Beep and let the user try again.
+      // XXX Maybe the status line could be made to provide more information on the error.
+      NSBeep();
+      [inputField selectText:self];
+      return;
+    }
+  NS_ENDHANDLER;
+
+  [inputField setStringValue:@""];
+}
+@end