How can I save a my own derived node class? - Diagramming Components

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How can I save a my own derived node class? (Read 1846 times)

brianh YaBB Newbies Offline Posts: 30 Joined: Jul 1^st, 2008	How can I save a my own derived node class? Jul 10^th, 2008 at 4:03pm	Print Post
	Hi, I have derived my own DiagramNode class from TableNode, and now I need to be able to save and restore these nodes along with the diagram. I found a thread on this forum discussing the problem and a possible solution, but that's a few years old and refers to an earlier version of the FlowChart: http://mindfusion.eu/Forum/YaBB.pl?board=fcnet_disc;action=display;num=113111092... The solution involved overriding GetClassId() and createObj(int clsid), but GetClassId() does not appear to be overridable, and I can't find createObj() anywhere! :S When I save my diagram to a stream it calls SaveTo(), but does NOT call LoadFrom() when loading, I guess this is because the object that it's creating is a TableNode and NOT my derived class. Is there a modern solution to this problem? Thanks. Brian


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Stoyo God Member Offline MindFusion support Posts: 13230 Joined: Jul 20^th, 2005	Re: How can I save a my own derived node class? Reply #1 - Jul 10^th, 2008 at 4:08pm	Print Post
	Hi, Use the Diagram.RegisterItemClass method, and override the SaveTo and LoadFrom methods. This is shown in the IconNodes sample project. I hope that helps, Stoyan


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brianh YaBB Newbies Offline Posts: 30 Joined: Jul 1^st, 2008	Re: How can I save a my own derived node class? Reply #2 - Jul 16^th, 2008 at 10:33am	Print Post
	Thanks Stoyan, that's just what I needed.


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