xenadmin/XenAdmin/Commands/Controls/CommandEditor.cs

/* Copyright (c) Citrix Systems, Inc. 
 * All rights reserved. 
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 * Redistribution and use in source and binary forms, 
 * with or without modification, are permitted provided 
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 * *   Redistributions of source code must retain the above 
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 *     following disclaimer. 
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 *     following disclaimer in the documentation and/or other 
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 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
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using System;
using System.Collections.Generic;
using System.Text;
using System.Drawing.Design;
using System.Windows.Forms.Design;
using System.ComponentModel;
using System.Windows.Forms;
using System.Reflection;
using System.Drawing;

namespace XenAdmin.Commands
{
    /// <summary>
    /// This is used so that the Command property on CommandToolStripButton and CommandToolStripMenuItem can be set with the Designer.
    /// </summary>
    internal class CommandEditor<TCommand> : UITypeEditor where TCommand : Command
    {
        public override object EditValue(ITypeDescriptorContext context, IServiceProvider provider, object value)
        {
            if (context != null && context.Instance != null && provider != null)
            {
                IWindowsFormsEditorService editor = provider.GetService(typeof(IWindowsFormsEditorService)) as IWindowsFormsEditorService;

                if (editor != null)
                {
                    CommandEditorControl ctrl = new CommandEditorControl(typeof(TCommand), value as Command);
                    ctrl.Closed += delegate { editor.CloseDropDown(); };
                    editor.DropDownControl(ctrl);
                    return ctrl.SelectedCommand ?? value;
                }
            }

            return null;
        }

        public override UITypeEditorEditStyle GetEditStyle(ITypeDescriptorContext context)
        {
            if (context != null && context.Instance != null)
            {
                return UITypeEditorEditStyle.DropDown;
            }

            return base.GetEditStyle(context);
        }

        public override bool IsDropDownResizable
        {
            get
            {
                return true;
            }
        }

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

        public override void PaintValue(PaintValueEventArgs e)
        {
            Command command = e.Value as Command;

            if (command != null)
            {
                Image image = command.MenuImage ?? command.ToolBarImage;

                if (image != null)
                {
                    e.Graphics.DrawImage(image, e.Bounds);
                }
            }

            base.PaintValue(e);
        }
    }
}