1 files changed, 68 insertions, 0 deletions
diff --git a/src/common/PropertyHolder.m b/src/common/PropertyHolder.m
new file mode 100644
index 0000000..82b4889
--- /dev/null
+++ b/src/common/PropertyHolder.m
@@ -0,0 +1,68 @@
+//
+//  PropertyHolder.m
+//  TikZiT
+//  
+//  Copyright 2011 Aleks Kissinger. All rights reserved.
+//  
+//  
+//  This file is part of TikZiT.
+//  
+//  TikZiT 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.
+//  
+//  TikZiT 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 TikZiT.  If not, see <http://www.gnu.org/licenses/>.
+//  
+
+#import "PropertyHolder.h"
+
+@implementation PropertyHolder
+
+
+- (id)init {
+    [super init];
+    notificationName = @"UnknownPropertyChanged";
+    return self;
+}
+
+- (id)initWithNotificationName:(NSString*)n {
+    [super init];
+    notificationName = [n copy];
+    return self;
+}
+
+- (void)postPropertyChanged:(NSString*)property oldValue:(id)value {
+    NSDictionary *userInfo;
+    if (value != nil) {
+        userInfo = [NSDictionary dictionaryWithObjectsAndKeys:
+                    property, @"propertyName",
+                    value, @"oldValue",
+                    nil];
+    } else {
+        userInfo = [NSDictionary dictionaryWithObject:property
+                                               forKey:@"propertyName"];
+    }
+    [[NSNotificationCenter defaultCenter] postNotificationName:notificationName
+                                                        object:self
+                                                      userInfo:userInfo];
+}
+
+- (void)postPropertyChanged:(NSString*)property {
+    [self postPropertyChanged:property oldValue:nil];
+}
+
+- (void)dealloc {
+    [notificationName release];
+    [super dealloc];
+}
+
+@end
+
+// vi:ft=objc:ts=4:noet:sts=4:sw=4