Dropdown

See the DropdownDemo.cs.

using System;
namespace Gridrand.RimGui.Manual
{
    /// <summary>
    /// Demos such as 
    /// <see cref="Gui.Dropdown(System.Collections.Generic.IReadOnlyList{string}, ref int, int)"/> and
    /// <see cref="Gui.InputDropdown(System.Collections.Generic.IReadOnlyList{string}, ref int, int)"/>
    /// </summary>
    class DropdownDemo : ManualBase, IManual
    {
        SampleEnum sampleEnum1;
        SampleEnum sampleEnum2;
        SampleFlagEnum sampleFlagEnum;
        int selectedIndex1;
        int selectedIndex2;
        readonly string[] items1 = new string[3]
        {
            "AAA",
            "BBB",
            "CCC",
        };
        string[] items2 = new string[9]
        {
            "012",
            "123",
            "234",
            "345",
            "456",
            "567",
            "678",
            "789",
            "890",
        };
        public DropdownDemo(ManualBaseResource p) : base(p)
        {
        }

        public void Draw()
        {
            Gui.Heading("Dropdown");
            // Pass the selected enum as the argument.
            Gui.Dropdown(ref sampleEnum1);
            Gui.Dropdown(items1, ref selectedIndex1);

            // Multiple selections possible
            Gui.Dropdown(ref sampleFlagEnum);

            Gui.Heading("LabelDropdown");
            Gui.LabelDropdown("with label", items1, ref selectedIndex1);
            Gui.LabelDropdown("with label", ref sampleEnum2);

            Gui.Heading("InputDropdown");
            Gui.InputDropdown(items1, ref selectedIndex1);
            Gui.InputDropdown(ref sampleEnum2);

            // The items will be scrolled because their total height is greater than MaxHeights.
            using (Style.Dropdown.MaxHeights.Begin(100))
                Gui.InputDropdown(items2, ref selectedIndex2);
        }

        enum SampleEnum
        {
            Element0,
            Element1,
            Element2
        }

        // If FlagsAttribute is attached, multiple selection is possible.
        [Flags]
        enum SampleFlagEnum
        {
            None = 0,
            Element1 = 1 << 0,
            Element2 = 1 << 1,
            Element3 = 1 << 2,
            Element4 = 1 << 3,
        }
    }
}