❔ UITypeEditor with DropDown Bitwise Enum Selector

namespace stigzler.Winforms.Base.Editors
{
    internal class FlagsEditor : UITypeEditor
    {
        UIElements.ListBox editor = null;

        // our editor is a Drop-down editor
        public override UITypeEditorEditStyle GetEditStyle(ITypeDescriptorContext context)
        {
            return UITypeEditorEditStyle.DropDown;
        }
        
        public override object EditValue(ITypeDescriptorContext context, IServiceProvider provider, object value)
        {

            if (provider != null)
            {
                // use windows forms editor service to show drop down
                IWindowsFormsEditorService edSvc = provider.GetService(typeof(IWindowsFormsEditorService)) as IWindowsFormsEditorService;
 
                editor = new UIElements.ListBox();
                editor.SelectionMode = SelectionMode.MultiExtended;

                // prepare list
                editor.DataSource = Enum.GetValues(typeof(EllipsisFormat));

                // show drop down now
                edSvc.DropDownControl(editor);

                // now we take the result 
                EllipsisFormat flags = 0;
                foreach (var item in editor.SelectedItems)
                {
                    flags |= (EllipsisFormat)item;
                }

                value = flags;
            }

            return (EllipsisFormat)value;
        }
    }
}

namespace stigzler.Winforms.Base.Editors
{
    internal class FlagsEditor : UITypeEditor
    {
        UIElements.ListBox editor = null;

        // our editor is a Drop-down editor
        public override UITypeEditorEditStyle GetEditStyle(ITypeDescriptorContext context)
        {
            return UITypeEditorEditStyle.DropDown;
        }
        
        public override object EditValue(ITypeDescriptorContext context, IServiceProvider provider, object value)
        {

            if (provider != null)
            {
                // use windows forms editor service to show drop down
                IWindowsFormsEditorService edSvc = provider.GetService(typeof(IWindowsFormsEditorService)) as IWindowsFormsEditorService;
 
                editor = new UIElements.ListBox();
                editor.SelectionMode = SelectionMode.MultiExtended;

                // prepare list
                editor.DataSource = Enum.GetValues(typeof(EllipsisFormat));

                // show drop down now
                edSvc.DropDownControl(editor);

                // now we take the result 
                EllipsisFormat flags = 0;
                foreach (var item in editor.SelectedItems)
                {
                    flags |= (EllipsisFormat)item;
                }

                value = flags;
            }

            return (EllipsisFormat)value;
        }
    }
}