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Difference between Diagram Type and Diagram Type Provider [message #731542]

Sat, 01 October 2011 16:30

vinaybedre

Messages: 8
Registered: September 2011

Junior Member

Hi,

Can anyone tell me the difference between Diagram Type and Diagram Type Provider in Graphiti.

--
Regards,
Vinay Bedre

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Re: Difference between Diagram Type and Diagram Type Provider [message #731561 is a reply to message #731542]

Sat, 01 October 2011 18:22

Hernan Gonzalez

Messages: 188
Registered: October 2010
Location: Buenos Aires, Argentina

Senior Member

When you code a Graphiti application, you tipically define your own DiagramType (basically, a string identifier) and its DiagramTypeProvider (basically a Java class. that is associated to a DiagramType; the declaration is done in your plugin.xml. This is explained in the first pages of the tutorial ("Features" and "Diagram").

In the typical workflow, When a diagram is saved, its DiagramType is saved inside it. And when the Graphiti editor loads it (assuming we are using the default DiagramEditor), it discovers the type, and find a declared DiagramTypeProvider that understand that type, and instantiates its Java class. This object will provide the editor with all the behaviour and features to show/manipulate the diagram.

[Updated on: Sat, 01 October 2011 18:23]

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