Custom (Component) Attributes - Wire Rendering

Hello all,

I'm trying to override the GH_ComponentAttributes Render method for a custom component, but struggling to render the wires. I know the SDK gives a custom parameter example using GH_Attributes<T> , but it doesn't require any incoming wires to be rendered.

I've tried getting all the sources from each Owner.Params.Input (see below), but no joy. Does anyone know how to render the wires correctly for a component? Struggling to figure it out.

protected override void Render(GH_Canvas canvas, Graphics graphics, GH_CanvasChannel channel)

{
if (channel == GH_CanvasChannel.Wires)
{
for (int i = 0; i < Owner.Params.Input.Count; i++)
{
RenderIncomingWires(canvas.Painter, Owner.Params.Input[i].Sources, Owner.Params.Input[i].WireDisplay);
}
return;
}

//some custom stuff here...

}

Many thanks,

John.

Replies to This Discussion

Permalink Reply by David Rutten on September 6, 2012 at 5:39am

Hi John,

if your attributes derive from GH_ComponentAttributes, all you have to do is call the base class Render method and all wires will be drawn. Is this not an option?

David Rutten

david@mcneel.com

Poprad, Slovakia

Permalink Reply by John Harding on September 6, 2012 at 6:25am

But of course. I think I was overly keen to use RenderIncomingWires somehow as per your GH_Param example! Thank you David.

protected override void Render(GH_Canvas canvas, Graphics graphics, GH_CanvasChannel channel)
{
if (channel == GH_CanvasChannel.Wires){
base.Render(canvas, graphics, channel);
}

if (channel == GH_CanvasChannel.Objects)
{

... custom object stuff here

}

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