dfDropdown.OnMouseDown C# (CSharp) Method

    protected internal override void OnMouseDown( dfMouseEventArgs args )
    {
        if( openOnMouseDown && !args.Used && args.Buttons == dfMouseButtons.Left && args.Source == this )
        {

            args.Use();
            base.OnMouseDown( args );

            if( this.popup == null )
                OpenPopup();
            else
                ClosePopup();

        }
        else
        {
            base.OnMouseDown( args );
        }
    }