Pass Data Between Component and Attributes

Grasshopper Developer
1

Hi All,

I was trying to use Menu_AppendTextItem in context menu to get user input and pass it to the IGH_Attributes Interface class (for future displaying such user input).

So far what I was able to update the value in the component side after click the “commit change” button, with the following structure:

namespace newComp.Components
{

    public class newComp : Grasshopper.Kernel.Special.GH_NumberSlider
    {

        public List<double> keyvalue;
        public newComp()

          : base()
        {

            this.keyvalue = new List<double> { 0.1, 0.1, 0.1, 0.1, 0.1, 0.1, 0.1, 0.1 }; 
        }


        public override GH_Exposure Exposure
        {
            get { return GH_Exposure.primary; }
        }

        public override void CreateAttributes()
        {
            {
                this.m_attributes = (IGH_Attributes)new newCompAttributes(this, keyvalue);
            }
        }

        public override void AppendAdditionalMenuItems(ToolStripDropDown menu)
        {
            ToolStripMenuItem PDDropdown = GH_DocumentObject.Menu_AppendItem(menu, "Custom keyvalue");

            Menu_AppendTextItem(PDDropdown.DropDown,
                                "Custom keyvalue",
                                null,
                                new GH_MenuTextBox.TextChangedEventHandler(updatePD),
                                true);

            PDDropdown.DropDown.Items[1].Click += (obj, e) => OK_Click(obj, e);
            PDDropdown.DropDown.Items[2].Click += (obj, e) => Cancel_Click(obj, e);

            base.AppendAdditionalMenuItems(menu);
        }

        private void OK_Click(object sender, EventArgs e)
        {
        	// update the keyvalue in component
        }

	}


    public class newCompAttributes : Grasshopper.Kernel.Special.GH_NumberSliderAttributes
    {

        private List<double> keyvalue;
        PSlider own;

        public PSliderAttributes(newComp owner, List<double> values) :
          base(owner)
        {
            keyvalue = values;
            own = owner;
        }

        protected override void Render(Grasshopper.GUI.Canvas.GH_Canvas canvas, Graphics graphics,
          Grasshopper.GUI.Canvas.GH_CanvasChannel channel)
        {
        	// ...
        }
    }
}

I was wondering how I can pass the user input value (keyValue) to the attribute side so it could be reflected on the UI?

Many thanks!

2

Resolved. If passing keyValue through base, it is binding by default.