Task flow diagram

Question

I need a solution on the following topic :
User will draw a task flow diagram in the screen .Flow will be first with Start then task 1 then task 2 .task 2 can have one child task 3 .task 2 will have another child task4.task 3 will have child task5 .task 3 will have child task6.task 4 and task 5 will have child task 6 and then end.USer will draw the diagram in the screen and I have to capture the data into the database so that I can get the same disgram once more in the screen.User can add any child ,delete any child while building the flow diagram.

Answer 1

You could try to put the graph into DOM tree and the store it in DB as text or serialized object (i.e. Document). The structure might be like this:
<graph name="some name">
    <nodes>
        <node>
            <unique_id>
            <name></name>
            <whatever_info_you need></.....>
        </node>
     </nodes>
     <edges>
        <edge>
            <unique_id>
             <from>node_id</from
             <to>node_id</to>
etc.It's just a very brief idea, but might work for you if you're sentenced' to write your own graph engine.