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Normal Topic Custom nodes? (Read 2815 times)
Rennie
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Custom nodes?
Jul 12th, 2013 at 4:25pm
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This is an amazing coincidence - I'm finally finished with the WinForms part of my program and I'm just starting to get into Android programming. And now MindFusion releases this viewer program! Great!

But - I worry about one thing. My program is very much based on a lot of custom nodes, both custom composite nodes and custom nodes derived directly from DiagramNode. Is this a problem? Is there any workaround?

Thanks.
  
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Stoyo
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Re: Custom nodes?
Reply #1 - Jul 13th, 2013 at 11:16am
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Hi,

You will have to port the drawing and XML deserialization part of your nodes to Java, e.g.:

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Diagram.registerItemClass(MyNode.class, "MyNode", 1);

public class MyNode extends DiagramNode
{
    protected void drawLocal(Canvas graphics, RenderOptions options)
    {
        // use Canvas API to draw node's elements
    }

    protected void loadFromXml(Element xmlElement, XmlPersistContext context)
    {
        super.loadFromXml(xmlElement, context);

        // use XmlPersistContext API to load properties
    }
}


Composite nodes are not supported at this time. You could still load them using a custom class registered with same ID, and render some representation of their components using Canvas methods.

I hope that helps,
Stoyan
  
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