GroupPluginFilterControl

using System;
using System.Collections.Generic;
using System.Data;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using ConnectAPI;

namespace CommonControls
{
    public partial class GroupPluginFilterControl : UserControl, IPluginFilter
    {
        protected CommandManagerTimer commandManager = new CommandManagerTimer(SystemSettings.KeyboardRepeatDelay);

        private WorkflowItemsFilter _wfiFilter;

        public GroupPluginFilterControl()
        {
            InitializeComponent();
            Initialization();
        }

        private void Initialization()
        {
            treeList.StateChanged += TreeList_StateChanged;
            treeList.AfterCheckNode += TreeList_AfterCheckNode;

            // moved here from the base class
            treeList.FocusChanged += TreeList_FocusChanged;
        }


        private void TreeList_AfterCheckNode(object sender, DevExpress.XtraTreeList.NodeEventArgs e)
        {
            commandManager.ExecuteCommand(HashedCommand.Create(OnCheckedChanged));
        }

        private void TreeList_StateChanged(object sender, EventArgs e)
        {
            commandManager.ExecuteCommand(HashedCommand.Create(OnCheckedChanged));
        }

        private void TreeList_FocusChanged(object sender, EventArgs e)
        {
            commandManager.ExecuteCommand(HashedCommand.Create(OnFocusChanged));
        }

        protected void OnFocusChanged()
        {
            _wfiFilter.FocusedGroup = treeList.FocusedObject as BaseUIObject;
        }

        protected void OnCheckedChanged()
        {
            _wfiFilter.CheckedGroups = GetCheckedItems();
        }

        private IEnumerable<BaseUIObject> GetCheckedItems()
        {
            return !CheckMode ?
                new BaseUIObject[0] :
                treeList
                    //.TreeNodeCollection.Where(node => node.CheckState == CheckState.Checked)
                    .GetAllCheckedNodes()
                    .Select(node => treeList.GetDataSourceObject(node) as BaseUIObject);
        }

        private bool CheckMode
        {
            get { return treeList.OptionsView.ShowCheckBoxes; }
            set
            {
                //bool needMembersReset = value != CheckMode;

                treeList.OptionsView.ShowCheckBoxes = value;
                //treeList.OptionsView.ShowIndicator = !value;

                treeList.OptionsSelection.InvertSelection = value;
                treeList.OptionsSelection.MultiSelect = !value;
                treeList.OptionsSelection.UseIndicatorForSelection = !value;

                //if (needMembersReset)
                //    ResetMembers();
            }
        }

        public void OnPluginRegistered(BaseFilter filter)
        {
            _wfiFilter = filter as WorkflowItemsFilter;
        }

    }
}