private void sldZoomLevel_Scroll(object sender, EventArgs e)
{
lblZoomInfo.Text = String.Format("{0}%", sldZoomLevel.Value * ZOOM_STEP_VALUE);
int oldPosX = _state.WindowSizeToRoom(bufferedPanel1.HorizontalScroll.Value);
int oldPosY = _state.WindowSizeToRoom(bufferedPanel1.VerticalScroll.Value);
_state.Scale = sldZoomLevel.Value * ZOOM_STEP_VALUE * 0.01f;
UpdateScrollableWindowSize();
bufferedPanel1.HorizontalScroll.Value = _state.RoomSizeToWindow(oldPosX);
bufferedPanel1.VerticalScroll.Value = _state.RoomSizeToWindow(oldPosY);
bufferedPanel1.Invalidate();
}