class CannonField

# File examples/tutorial/t10/cannon.rb, line 7
def initialize(parent = nil)
  super
  @ang = 45
  @f = 0
  setPalette(Qt::Palette.new(Qt::Color.new(250, 250, 200)))
  setAutoFillBackground(true)
end

# File examples/tutorial/t13/cannon.rb, line 29
def angle()
  return @currentAngle
end

# File examples/tutorial/t14/cannon.rb, line 41
def angle=(degrees)
  if degrees < 5
    degrees = 5
  elsif degrees > 70
    degrees = 70
  end
  if @currentAngle == degrees
    return
  end
  @currentAngle = degrees
  update(cannonRect())
  emit angleChanged(@currentAngle)
end

# File examples/tutorial/t13/cannon.rb, line 33
def force()
  return @currentForce
end

# File examples/tutorial/t14/cannon.rb, line 55
def force=(newton)
  if newton < 0
    newton = 0
  end
  if @currentForce == newton
    return
  end
  @currentForce = newton
  emit forceChanged(@currentForce)
end

# File examples/tutorial/t13/cannon.rb, line 37
def gameOver()
  return @gameEnded
end

# File examples/tutorial/t13/cannon.rb, line 203
def isShooting()
  return @autoShootTimer.isActive()
end

# File examples/tutorial/t14/cannon.rb, line 141
def mouseMoveEvent(e)
  if !@barrelPressed
    return
  end
  pnt = e.pos();
  if pnt.x() <= 0
    pnt.setX(1)
  end
  if pnt.y() >= height()
    pnt.setY(height() - 1)
  end
  rad = atan2((rect().bottom() - pnt.y()), pnt.x())
  self.angle = (rad * 180 / 3.14159265).round
end

# File examples/tutorial/t14/cannon.rb, line 132
def mousePressEvent(e)
  if e.button() != Qt::LeftButton
    return
  end
  if barrelHit(e.pos())
    @barrelPressed = true
  end
end

# File examples/tutorial/t14/cannon.rb, line 156
def mouseReleaseEvent(e)
  if e.button() == Qt::LeftButton
    @barrelPressed = false
  end
end

# File examples/tutorial/t12/cannon.rb, line 62
def newTarget()
  if @@currentForceirst_time
    @@currentForceirst_time = false
    midnight = Qt::Time.new(0, 0, 0)
    srand(midnight.secsTo(Qt::Time.currentTime()))
  end
  r = Qt::Region.new(targetRect())
  @target = Qt::Point.new(200 + rand(190),
               10 + rand(255))
  repaint(r.unite(Qt::Region.new(targetRect())))
end

# File examples/tutorial/t10/cannon.rb, line 40
def paintEvent(e)
  if !e.rect().intersects(cannonRect())
    return
  end

  cr = cannonRect()
  pix = Qt::Pixmap.new(cr.size())
  pix.fill(self, cr.topLeft())

  painter = Qt::Painter.new(pix)
  painter.setBrush(Qt::Brush.new(Qt::blue))
  painter.setPen(Qt::NoPen)
  painter.translate(0, pix.height() - 1)
  painter.drawPie(Qt::Rect.new(-35, -35, 70, 70), 0, 90 * 16)
  painter.rotate(- @ang)
  painter.drawRect(Qt::Rect.new(33, -4, 15, 8))
  painter.end()

  painter.begin(self)
  painter.drawPixmap(cr.topLeft(), pix)
  painter.end()
end

# File examples/tutorial/t13/cannon.rb, line 100
def restartGame()
  if isShooting()
    @autoShootTimer.stop()
  end
  @gameEnded = false
  update()
  emit canShoot(true)
end

# File examples/tutorial/t10/cannon.rb, line 15
def setAngle(degrees)
  if degrees < 5
    degrees = 5
  elsif degrees > 70
    degrees = 70
  end
  if @ang == degrees
    return
  end
  @ang = degrees
  repaint()
  emit angleChanged(@ang)
end

# File examples/tutorial/t10/cannon.rb, line 29
def setForce(newton)
  if newton < 0
    newton = 0
  end
  if @f == newton
    return
  end
  @f = newton
  emit forceChanged(@f)
end

# File examples/tutorial/t13/cannon.rb, line 89
def setGameOver()
  if @gameEnded
    return
  end
  if isShooting()
    @autoShootTimer.stop()
  end
  @gameEnded = true
  update()
end

# File examples/tutorial/t11/cannon.rb, line 48
def shoot()
  if @autoShootTimer.isActive()
    return
  end;
  @timerCount = 0
  @shootAngle = @currentAngle
  @shootForce = @currentForce
  @autoShootTimer.start(5)
end

# File examples/tutorial/t14/cannon.rb, line 259
def shooting?
  return @autoShootTimer.active?
end

# File examples/tutorial/t10/cannon.rb, line 69
def sizePolicy()
  return Qt::SizePolicy.new(Qt::SizePolicy::Expanding, Qt::SizePolicy::Expanding)
end