xenadmin/XenAdmin/Controls/FilterStatusToolStripDropDownButton.cs

/* Copyright (c) Citrix Systems Inc. 
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 * with or without modification, are permitted provided 
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 *     following disclaimer. 
 * *   Redistributions in binary form must reproduce the above 
 *     copyright notice, this list of conditions and the 
 *     following disclaimer in the documentation and/or other 
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using System;
using System.ComponentModel;
using System.Collections.Generic;
using System.Diagnostics;
using System.Text;
using System.Windows.Forms;

namespace XenAdmin.Controls
{
    public class FilterStatusToolStripDropDownButton : ToolStripDropDownButton
    {
        public event Action FilterChanged;

        private bool internalUpdating;

        private ToolStripMenuItem toolStripMenuItemComplete;
        private ToolStripMenuItem toolStripMenuItemInProgress;
        private ToolStripMenuItem toolStripMenuItemError;
        private ToolStripMenuItem toolStripMenuItemAll;

        public FilterStatusToolStripDropDownButton()
        {
            toolStripMenuItemComplete = new ToolStripMenuItem
                                            {
                                                Text = Messages.STATUS_FILTER_COMPLETE,
                                                Checked = true,
                                                CheckOnClick = true
                                            };
            toolStripMenuItemInProgress = new ToolStripMenuItem
                                              {
                                                  Text = Messages.STATUS_FILTER_IN_PROGRESS,
                                                  Checked = true,
                                                  CheckOnClick = true
                                              };
            toolStripMenuItemError = new ToolStripMenuItem
                                         {
                                             Text = Messages.STATUS_FILTER_ERROR,
                                             Checked = true,
                                             CheckOnClick = true
                                         };
            toolStripMenuItemAll = new ToolStripMenuItem
            {
                Text = Messages.FILTER_SHOW_ALL,
                Enabled = false
            };
            DropDownItems.AddRange(new ToolStripItem[]
                                       {
                                           toolStripMenuItemComplete,
                                           toolStripMenuItemInProgress,
                                           toolStripMenuItemError,
                                           new ToolStripSeparator(),
                                           toolStripMenuItemAll
                                       });

            toolStripMenuItemComplete.CheckedChanged += Item_CheckedChanged;
            toolStripMenuItemInProgress.CheckedChanged += Item_CheckedChanged;
            toolStripMenuItemError.CheckedChanged += Item_CheckedChanged;
        }

        public bool FilterIsOn
        {
            get
            {
                return !toolStripMenuItemComplete.Checked
                    || !toolStripMenuItemInProgress.Checked
                    || !toolStripMenuItemError.Checked;
            }
        }

        protected override void OnDropDownItemClicked(ToolStripItemClickedEventArgs e)
        {
            base.OnDropDownItemClicked(e);

            if (e.ClickedItem == toolStripMenuItemAll)
            {
                internalUpdating = true;
                toolStripMenuItemComplete.Checked = true;
                toolStripMenuItemInProgress.Checked = true;
                toolStripMenuItemError.Checked = true;
                internalUpdating = false;

                Item_CheckedChanged(null, null);
            }

            if (FilterChanged != null)
                FilterChanged();
        }

        private void Item_CheckedChanged(object sender, EventArgs e)
        {
            if (!internalUpdating)
                toolStripMenuItemAll.Enabled = FilterIsOn;
        }
    }
}