Various random Unity editor snippets

UnityEditorCheatSheet.cs

// Create Dropdown button
if (EditorGUI.DropdownButton(position, GUIContent.none, FocusType.Passive))
{
    var genericMenu = new GenericMenu();
    
    // List<string> options
    foreach (var option in options)
    {
        bool selected = option == property.stringValue;
        genericMenu.AddItem(new GUIContent(options), selected, () =>
        {
            Debug.Log(option + " selected!");
        });
    }
    genericMenu.DropDown(position);
}

// Clear text field selection/component selection (does not work outside OnGUI)
EditorGUI.FocusTextInControl(null);
GUI.FocusControl(null);

// Convert local OnGUI coordinates to screen coordinates
var screenRect = GUIUtility.GUIToScreenRect(position); // Also GUIUtility.GUIToScreenPoint