How to hide an input parameter

Grasshopper Developer
1

Hi All,
I am registering two input parameters to record the values of the sliders (custom attributes) in the component. everything works fine and I just need to hide those parameters so user can only interact with sliders. the method
pManager.HideParameter(index);

does not do anything , any idea?

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2

Do not register them in RegisterInputParams().

3

Then how can I save the current value in the GH file without having a parameter registered ?

4

Override Write() and Read() to serialize and deserialize your data. Any other automatic behaviour that the parameters do, you will have to replace them yourself if needed. As far as I know you can’t register a parameter and not have it appear in the capsule.

1 Like
5

Thanks Dani, I am new to GH_IWriter Interface , can you point me to a sample code or an implementation example.

6 
        private double _sliderValue1; 
        public override bool Write(GH_IWriter writer)
        {
            writer.SetDouble(nameof(_sliderValue1), _sliderValue1);
            return base.Write(writer);
        }
        public override bool Read(GH_IReader reader)
        {
            if (reader.ItemExists(nameof(_sliderValue1)))
                _sliderValue1 = reader.GetDouble(nameof(_sliderValue1));
            return base.Read(reader);
        }
1 Like
7

Thanks a lot
It was simpler than what I expected ,
Just one more thing , the Read() method gets called before solution update or there is mechanism to call it manually?

8

It is called automatically and shouldn’t be used manually in most cases.
Though I’d recommend SetValue/GetValue rather than overriding Read/Write. The latter is more error-prone.

9

Read and Write are just for writing to the gh file.

10

I implemented the SetValue and GetValue methods. They only save the values in the component, after I saved the GH file and re-open it the GetValue did not work. so I think I go with Dani’s solution.
Thanks