public LayerManagerDlg()
        {
            InitializeComponent();
            LayerList.SetItemHeight(24);
            EXColumnHeader layer_icon = new EXColumnHeader("", 36);

            LayerList.Columns.Add(layer_icon);
            LayerList.Columns.Add(new EXEditableColumnHeader("工作层", 300));
            EXBoolColumnHeader active_icon = new EXBoolColumnHeader("激活", 48);

            active_icon.Editable   = true;
            active_icon.TrueImage  = NexusEditor.Properties.Resources.active;
            active_icon.FalseImage = NexusEditor.Properties.Resources.disactive;
            LayerList.Columns.Add(active_icon);
            EXBoolColumnHeader vis_icon = new EXBoolColumnHeader("渲染", 48);

            vis_icon.Editable   = true;
            vis_icon.TrueImage  = NexusEditor.Properties.Resources.visible;
            vis_icon.FalseImage = NexusEditor.Properties.Resources.disactive;
            LayerList.Columns.Add(vis_icon);
            EXBoolColumnHeader lock_icon = new EXBoolColumnHeader("冻结", 48);

            lock_icon.Editable   = true;
            lock_icon.TrueImage  = NexusEditor.Properties.Resources.lock_layer;
            lock_icon.FalseImage = NexusEditor.Properties.Resources.disactive;
            LayerList.Columns.Add(lock_icon);
        }