kev/Drawer/UCDraw/SigmaDrawerWellStyle/PropertyEditorListBox.cs

using System;
using System.ComponentModel;
using System.Drawing.Design;
using System.Windows.Forms.Design;

namespace GeoSigma.SigmaDrawerStyle
{
    /// <summary>
    /// 岩性编辑器
    /// </summary>
    public class PropertyEditorListBox : UITypeEditor
    {
        /// <inheritdoc/>
        public override UITypeEditorEditStyle GetEditStyle(System.ComponentModel.ITypeDescriptorContext context)
        {
            return UITypeEditorEditStyle.DropDown;
        }

        /// <inheritdoc/>
        public override object EditValue(ITypeDescriptorContext context, IServiceProvider provider, object value)
        {
            IWindowsFormsEditorService edSvc = (IWindowsFormsEditorService)provider.GetService(typeof(IWindowsFormsEditorService));
            if (edSvc == null)
            {
                return value;
            }

            if (!(value is string) && value != null)
            {
                return value;
            }

            var attr = context?.PropertyDescriptor?.Attributes[typeof(ListBoxEditorAttribute)] as ListBoxEditorAttribute;
            if (attr == null)
            {
                return value;
            }

            var listBox = ListBoxEditorFactory.Create(attr.ControlKey);
            if (listBox == null)
            {
                return value;
            }

            listBox.SelectedIndexChanged += (s, e) =>
            {
                edSvc.CloseDropDown();
            };

            edSvc.DropDownControl(listBox);

            return listBox.SelectedItem?.ToString() ?? value;
        }
    }
}