ShareX/ShareX.HelpersLib/Controls/ToolStripEx.cs

#region License Information (GPL v3)

/*
    ShareX - A program that allows you to take screenshots and share any file type
    Copyright (c) 2007-2016 ShareX Team

    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License
    as published by the Free Software Foundation; either version 2
    of the License, or (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.

    Optionally you can also view the license at <http://www.gnu.org/licenses/>.
*/

#endregion License Information (GPL v3)

using System;
using System.Drawing;
using System.Windows.Forms;

namespace ShareX.HelpersLib
{
    public class ToolStripEx : ToolStrip
    {
        public event MouseEventHandler GripMouseDown;

        private bool clickThrough = false;

        public bool ClickThrough
        {
            get
            {
                return clickThrough;
            }
            set
            {
                clickThrough = value;
            }
        }

        protected override void WndProc(ref Message m)
        {
            base.WndProc(ref m);

            if (clickThrough && m.Msg == (int)WindowsMessages.MOUSEACTIVATE && m.Result == (IntPtr)NativeConstants.MA_ACTIVATEANDEAT)
            {
                m.Result = (IntPtr)NativeConstants.MA_ACTIVATE;
            }
        }

        protected override void OnMouseDown(MouseEventArgs mea)
        {
            if (GripRectangle.Offset(2).Contains(mea.Location))
            {
                OnGripMouseDown(mea);
            }
            else
            {
                base.OnMouseDown(mea);
            }
        }

        protected virtual void OnGripMouseDown(MouseEventArgs mea)
        {
            if (GripMouseDown != null)
            {
                GripMouseDown(this, mea);
            }
        }
    }
}