SourceCode/PROMS/DotNetBar Source Code/InstrumentationControls/KnobControlDesignTime/FormatStringEditor.cs

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

namespace DevComponents.Instrumentation.Design
{
    public class FormatStringEditor : UITypeEditor
    {
        #region GetEditStyle

        public override UITypeEditorEditStyle GetEditStyle(ITypeDescriptorContext context)
        {
            return (UITypeEditorEditStyle.DropDown);
        }

        #endregion

        #region GetPaintValueSupported

        public override bool GetPaintValueSupported(ITypeDescriptorContext context)
        {
            return (false);
        }

        #endregion

        #region EditValue

        public override object EditValue(
            ITypeDescriptorContext context, IServiceProvider provider, object value)
        {
            if (provider != null)
            {
                IWindowsFormsEditorService editorService =
                    provider.GetService(typeof(IWindowsFormsEditorService)) as IWindowsFormsEditorService;

                if (editorService != null)
                {
                    FormatStringDropDown fs = new
                        FormatStringDropDown((string)value, editorService, context);

                    fs.EscapePressed = false;

                    editorService.DropDownControl(fs);

                    if (fs.EscapePressed == true)
                        context.PropertyDescriptor.SetValue(context.Instance, value);
                    else
                        return (fs.FormatString);
                }
            }

            return (base.EditValue(context, provider, value));
        }

        #endregion
    }
}