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Closeop | The operator identifier. |
Adds a custom filter operator.
using System; using System.Collections.Generic; using System.Linq; using UnityEditor; using UnityEditor.Search; using UnityEngine; static class Example_QueryEngine_AddOperator { static List<MyObjectType> s_Data; [MenuItem("Examples/QueryEngine/AddOperator")] public static void RunExample() { // Set up the query engine var queryEngine = new QueryEngine<MyObjectType>(); queryEngine.AddFilter("id", myObj => myObj.id); queryEngine.SetSearchDataCallback(myObj => new[] { myObj.id.ToString(), myObj.name }); // Add a new operator token const string op = "%"; queryEngine.AddOperator(op); // Define what this operator does, and which types it operates on. queryEngine.AddOperatorHandler(op, (int ev, int fv) => ev % fv == 0); s_Data = new List<MyObjectType>() { new MyObjectType { id = 0, name = "Test 1", position = new Vector2(0, 0), active = false }, new MyObjectType { id = 1, name = "Test 2", position = new Vector2(0, 1), active = true }, new MyObjectType { id = 2, name = "Test 3", position = new Vector2(1, 0), active = false }, new MyObjectType { id = 3, name = "Test 4", position = new Vector2(1.2f, 0), active = false }, }; // Find all items that have an id divisible by 2 var query = queryEngine.ParseQuery("id%2"); var filteredData = query.Apply(s_Data).ToList(); Debug.Assert(filteredData.Count == 2, $"There should be 2 items in the filtered list but found {filteredData.Count} items."); Debug.Assert(filteredData.Contains(s_Data[0]), "Test 1 should be in the list as its id is divisible by 2."); Debug.Assert(filteredData.Contains(s_Data[2]), "Test 3 should be in the list as its id is divisible by 2."); { // Get an operator based on its token and add some handlers on it. var operatorToken = "%"; var operatorObject = queryEngine.GetOperator(operatorToken); if (operatorObject.valid) operatorObject.AddHandler((float ev, float fv) => Math.Abs(ev % fv) < 0.0000001f); } { // Remove an operator based on its token var operatorToken = "%"; queryEngine.RemoveOperator(operatorToken); } query = queryEngine.ParseQuery("id%2"); filteredData = query.Apply(s_Data).ToList(); Debug.Assert(filteredData.Count == 0, $"There should be 0 items in the filtered list but found {filteredData.Count} items."); } class MyObjectType { public int id { get; set; } public string name { get; set; } = string.Empty; public Vector2 position { get; set; } = Vector2.zero; public bool active { get; set; } public override string ToString() { return $"({id}, {name}, ({position.x}, {position.y}), {active})"; } } }
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