xenadmin/XenAdmin/Controls/TreeViews/FolderChangeDialogTreeView.cs

/* Copyright (c) Citrix Systems, Inc. 
 * All rights reserved. 
 * 
 * Redistribution and use in source and binary forms, 
 * with or without modification, are permitted provided 
 * that the following conditions are met: 
 * 
 * *   Redistributions of source code must retain the above 
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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 
 *     materials provided with the distribution. 
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 
 * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, 
 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR 
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 
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 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 
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using System.Windows.Forms;

namespace XenAdmin.Controls
{
    internal class FolderChangeDialogTreeView : VirtualTreeView
    {
        public bool expandOnDoubleClick = true;
        private bool blockExpansion;

        protected override void OnMouseDown(MouseEventArgs e)
        {
            if (e.Clicks > 1)
                blockExpansion = true;

            var hitTesInfo = HitTest(e.X, e.Y);
            if (hitTesInfo.Node == null)
                SelectedNode = null;

            base.OnMouseDown(e);
        }

        protected override void OnBeforeExpand(VirtualTreeViewCancelEventArgs e)
        {
            if (!expandOnDoubleClick && blockExpansion)
            {
                blockExpansion = false;
                e.Cancel = true;
                return;
            }
            base.OnBeforeExpand(e);
        }

        protected override void OnBeforeCollapse(VirtualTreeViewCancelEventArgs e)
        {
            if (!expandOnDoubleClick && blockExpansion)
            {
                blockExpansion = false;
                e.Cancel = true;
                return;
            }
            base.OnBeforeCollapse(e);
        }
    }
}