init free 2.1.3

2025-08-02 20:11:41 +08:00
commit 24bc0ab149
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+using System;
+using System.Collections.Generic;
+
+namespace NovaSamples.UIControls
+{
+    /// <summary>
+    /// A data structure used to store the state of a dropdown UI control.
+    /// </summary>
+    [Serializable]
+    public class DropdownData
+    {
+        public const string NothingSelected = "None";
+
+        /// <summary>
+        /// The index into the list of <see cref="Options"/> of the selected value.
+        /// </summary>
+        public int SelectedIndex;
+
+        /// <summary>
+        /// The list of selectable options the end-user can choose from for this given dropdown.
+        /// </summary>
+        public List<string> Options = new List<string>();
+
+        /// <summary>
+        /// The currently selected item, if one is selected, otherwise <see cref="NothingSelected"/>.
+        /// </summary>
+        public string CurrentSelection
+        {
+            get
+            {
+                if (Options == null || SelectedIndex < 0 || SelectedIndex >= Options.Count)
+                {
+                    // If the dropdown doesn't have any options or the
+                    // SelectedIndex is out of range, indicate nothing selected.
+                    return NothingSelected;
+                }
+
+                // Return the selected option
+                return Options[SelectedIndex];
+            }
+        }
+    }
+}
+