 
   deinit { SDL_DestroyTexture(texture) }
 
+}
+
+
+public struct CellPoint {
+  var x: Int
+  var y: Int
 }
 
 

          p("mouse button down \(ev.button.x) \(ev.button.y) \(ev.button.clicks)")
        } else if ev.type == MOUSEBUTTONUP {
          p("mouse button up \(ev.button.x) \(ev.button.y) \(ev.button.clicks)")
        } else if ev.type == TEXTINPUT {
          p("text input \(ev.text)")
        } else if ev.type == QUIT {

    self.height = Int((height - doublePadding) / cellHeight)
  }

  public func pointToCell(x: Int32, y: Int32) -> CellPoint? {
    p("pointToCell \(x) \(y)")
    if x >= padding && x <= (cellWidth * Int32(width)) + padding &&
        y >= padding && y <= (cellHeight * Int32(height)) + padding {
      return CellPoint(x: Int((x - padding) / cellWidth),
          y: Int((y - padding) / cellHeight))
    }
    return nil
  }

}
