Andwho.Windows.Forms.Metro.MetroForm.OnMouseDown C# (CSharp) Метод

        protected override void OnMouseDown(MouseEventArgs e)
        {
            base.OnMouseDown(e);
            if (!DesignMode && e.Button == MouseButtons.Left)
            {
                if (this.Items.Count > 0)
                {
                    foreach (MetroItem item in this.Items)
                    {
                        if (item.Rectangle.Contains(e.Location))
                        {
                            item.MouseState = EMouseState.Down;
                            this._mouseDown = true;
                        }
                        this.Invalidate(item.Rectangle);
                    }
                }
                if (this.StartRect.Contains(e.Location))
                {
                    this._mouseDown = true;
                    this._startState = EMouseState.Down;
                    this.Invalidate(this.StartRect);
                }
            }
        }