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• 0.7.0
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• KeyEventHandler.scala

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cwinter.codecraft.graphics.engine.KeyEventHandler.scala Maven / Gradle / Ivy

package cwinter.codecraft.graphics.engine


private[codecraft] class KeyEventHandler(
  val gameWorld: Simulator,
  val camera: Camera2D
) {
  final val moveSpeed = 100
  final val zoomSpeed = 0.2f

  def keypress(key: Key): Unit = key match {
    case LeftArrow | Letter('a') => camera.x -= moveSpeed * camera.zoomFactor
    case RightArrow | Letter('d') => camera.x += moveSpeed * camera.zoomFactor
    case UpArrow | Letter('w') => camera.y += moveSpeed * camera.zoomFactor
    case DownArrow | Letter('s') => camera.y -= moveSpeed * camera.zoomFactor
    case PageUp | Letter('q') => camera.zoom -= zoomSpeed
    case PageDown | Letter('e') => camera.zoom += zoomSpeed
    case Letter('r') =>
      if (gameWorld.framerateTarget >= 30) gameWorld.framerateTarget -= 10
      else if (gameWorld.framerateTarget >= 15) gameWorld.framerateTarget -= 5
      else if (gameWorld.framerateTarget > 1) gameWorld.framerateTarget -= 1
    case Letter('f') =>
      if (gameWorld.framerateTarget < 10) gameWorld.framerateTarget += 1
      else if (gameWorld.framerateTarget < 30) gameWorld.framerateTarget += 5
      else gameWorld.framerateTarget += 10
    case Letter(' ') => gameWorld.togglePause()
    case Letter('p') =>
      if (gameWorld.framerateTarget == 5) gameWorld.framerateTarget = 30
      else gameWorld.framerateTarget = 5
    case Letter(x) => gameWorld.handleKeypress(x)
    case _ =>
  }
}

private[codecraft] sealed trait Key
private[codecraft] case class Letter(char: Char) extends Key
private[codecraft] case object LeftArrow extends Key
private[codecraft] case object RightArrow extends Key
private[codecraft] case object UpArrow extends Key
private[codecraft] case object DownArrow extends Key
private[codecraft] case object PageUp extends Key
private[codecraft] case object PageDown extends Key