iSpyApplication.Controls.VolumeLevel.GetButtonByIndex C# (CSharp) Method

        private Rectangle GetButtonByIndex(int buttonIndex, out Rectangle destRect)
        {
            Rectangle rSrc = Rectangle.Empty;
            bool b = IsEnabled;
            switch (buttonIndex)
            {
                case 0://power
                    rSrc = b ? MainForm.RPowerOn : MainForm.RPower;
                    break;
                case 1://record
                    if (b && Helper.HasFeature(Enums.Features.Recording))
                        rSrc = (Recording || ForcedRecording) ? MainForm.RRecordOn : MainForm.RRecord;
                    else
                    {
                        rSrc = MainForm.RRecordOff;
                    }
                    break;
                case 2://settings
                    rSrc = Helper.HasFeature(Enums.Features.Edit) ? MainForm.REdit : MainForm.REditOff;
                    break;
                case 3://web
                    rSrc = Helper.HasFeature(Enums.Features.Access_Media) ? MainForm.RWeb : MainForm.RWebOff;
                    break;
                case 4://listen
                    if (b)
                        rSrc = Listening ? MainForm.RListenOn : MainForm.RListen;
                    else
                        rSrc = MainForm.RListenOff;
                    break;
            }

            if (MainForm.Conf.BigButtons)
            {
                rSrc.X -= 2;
                rSrc.Width += 8;
                rSrc.Height += 8;
            }
            var bp = ButtonPanel;
            destRect = new Rectangle(bp.X + buttonIndex * (bp.Width / ButtonCount) + 5, bp.Top+5, rSrc.Width, rSrc.Height);
            return rSrc;
        }