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Src/Unity/Scripts/Utility/Editor/SerializableGuidPropertyDrawer.cs

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+#if UNITY_EDITOR
+using System;
+using UnityEditor;
+using UnityEngine;
+
+namespace BITKit.GameEditor
+{
+    /// <summary>
+/// Property drawer for SerializableGuid
+///
+/// Author: Searous
+/// </summary>
+[CustomPropertyDrawer(typeof(SerializableGuid))]
+public class SerializableGuidPropertyDrawer : PropertyDrawer {
+ 
+    private float ySep = 20;
+    private float buttonSize;
+ 
+    public override void OnGUI(Rect position, SerializedProperty property, GUIContent label) {
+        // Start property draw
+        EditorGUI.BeginProperty(position, label, property);
+ 
+        // Get property
+        SerializedProperty serializedGuid = property.FindPropertyRelative("serializedGuid");
+ 
+        // Draw label
+        position = EditorGUI.PrefixLabel(new Rect(position.x, position.y + ySep / 2, position.width, position.height), GUIUtility.GetControlID(FocusType.Passive), label);
+        position.y -= ySep / 2; // Offsets position so we can draw the label for the field centered
+ 
+        buttonSize = position.width / 3; // Update size of buttons to always fit perfeftly above the string representation field
+ 
+        // Buttons
+        if(GUI.Button(new Rect(position.xMin, position.yMin, buttonSize, ySep - 2), "New")) {
+            serializedGuid.stringValue = Guid.NewGuid().ToString();
+        }
+        if(GUI.Button(new Rect(position.xMin + buttonSize, position.yMin, buttonSize, ySep - 2), "Copy")) {
+            EditorGUIUtility.systemCopyBuffer = serializedGuid.stringValue;
+        }
+        if(GUI.Button(new Rect(position.xMin + buttonSize * 2, position.yMin, buttonSize, ySep - 2), "Empty"))
+        {
+            serializedGuid.stringValue = Guid.Empty.ToString();
+        }
+ 
+        // Draw fields - passs GUIContent.none to each so they are drawn without labels
+        Rect pos = new Rect(position.xMin, position.yMin + ySep, position.width, ySep - 2);
+        EditorGUI.PropertyField(pos, serializedGuid, GUIContent.none);
+ 
+        // End property
+        EditorGUI.EndProperty();
+    }
+ 
+    public override float GetPropertyHeight(SerializedProperty property, GUIContent label) {
+        // Field height never changes, so ySep * 2 will always return the proper hight of the field
+        return ySep * 2;
+    }
+}
+ 
+}
+#endif