--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/pkg-src/tree-nx/TreeButton.m	Mon Aug 13 09:43:35 2007 +0200
@@ -0,0 +1,67 @@
+//
+//	TreeButton.m -- a class to attach to tree data structures
+//		This class requires the String class, also by Don Yacktman.
+//		Written by Don Yacktman (c) 1993 by Don Yacktman.
+//				All rights reserved.
+//
+//	I doubt this will be useful for much beyond what it does in the demo
+//		program supplied in this directory.
+//
+//		You may use and copy this class freely as long as you
+//		comply with the following terms:
+//			(1) If you use this class in an application which you
+//				intend to sell commercially, as shareware, or otherwise,
+//				you may only do so with express written permission
+//				of the author.  Use in applications which will
+//				be distributed free of charge is encouraged.
+//			(2) You must include the source code to this object and
+//				all accompanying documentation with your application,
+//				or provide it to users if requested, free of charge.
+//			(3) Do not remove the author's name or any of the
+//				copyright notices
+//
+
+#import "TreeButton.h"
+#import "TreeButtonCell.h"
+#import "NamedTree.h"
+
+@implementation TreeButton
+
+static id treeButtonCell;
+
++ initialize
+{
+	if (self == [TreeButton class]) {
+		treeButtonCell = [TreeButtonCell class]; // default cell class
+	}
+	return self;
+}
+
++ setCellClass:classId
+{
+	treeButtonCell = classId;
+	return self;
+}
+
+- initFrame:(const NXRect *)frameRect
+{
+	id oldCell;
+	
+	[super initFrame:frameRect];
+	oldCell = [self setCell:[[[treeButtonCell alloc] init] setParent:self]];
+	[oldCell free];
+	
+	return self;
+}
+
+- wasSelected:sender
+{	// message is sent here by the Cell if the user clicked the button
+	if ([myTreeNode respondsTo:@selector(activateNode:)])
+		[myTreeNode activateNode:self];
+	return self;
+}
+
+- treeNode { return myTreeNode; }
+- setTreeNode:node { myTreeNode = node; return self; }
+
+@end