Which component class should I use to change the behavior of a number_slider?

[ivelin.peychev]

Is it special class or simply GH_Component with custom attributes?

Here as far as I understand ghpython is derived from a special type. Is there something special for sliders too?

mcneel/ghpython/blob/master/Component/PythonComponent.cs

Thanks in advance

[ivelin.peychev]

@ParamDesSing

It has to be a Grasshopper.Kernel.Special.GH_NumberSlider or a GalapagosComponents.GalapagosGeneListObject .

@ParamDesSing

I guess you could try extending these classes with extension methods, but I think you need to do that in C#.

@DavidRutten

Galapagos doesn’t look at the pixels of an object to decide whether or not it’ll connect to it, it looks at the ComponentGUID, and since you’re not allowed to load an object which has a conflicting ComponentGUID with something already loaded, I really don’t see how that would work.

That said, I would like to put things in order and leave the other thread for Galapagos. This one for Slider alteration.

Hi @DavidRutten,

I have a couple of questions about the GH_NumberSlider:

• are the methods/attributes/properties inside it all public?
  Although since they don’t show in the autocomplete I think I have my answer.
  
  

• what are the names of the min and max values properties/methods?

[dsonntag]

The domain, value, etc. are properties of GH_NumberSlider.Slider. E.g. you can set GH_NumberSlider.Slider.Min and GH_NumberSlider.Slider.Max. If the current value of the slider is not inside the domain this will create funny graphic effects

I think there were large posts regarding slider manipulation in the past, search the forum for GH_NumberSlider and you will find immediately.

[ivelin.peychev]

@dsonntag

GH_NumberSlider.Slider.Min and GH_NumberSlider.Max

Could you share how did you find these?

[dsonntag]

This shows up in my autocomplete… But I think GH_NumberSlider.Slider is a handle to GH_SliderBase which should be documented.

https://developer.rhino3d.com/api/grasshopper/html/T_Grasshopper_GUI_Base_GH_SliderBase.htm

[ivelin.peychev]

@dsonntag

GH_NumberSlider.Slider is a handle to GH_SliderBase which should be documented.

Unfortunately, if I create a class derived from GH_SliderBase it will not be exactly like extending GH_NumberSlider, which ultimately will cause Galapagos to reject it.

[dsonntag]

That’s part of another discussion, I think

Anyways, I was not suggesting to derive anything from GH_SliderBase. All I was saying is, that the properties you seem to be interested in (slider value, min value, max value, type etc.) are not properties of GH_NumberSlider, instead GH_NumberSlider carries an instance of GH_SliderBase which exposes the beforementioned properties. If you want to manipulate a slider, you can do so by getting a handle to a slider object on the canvas (which will be of type GH_NumberSlider) and access it’s Slider property.