gui

type Action int

type AudioReader interface {
	io.Reader
	Nudge()
}

type AudioSetup struct {
	Freq int
	Read AudioReader
}

type Blob struct {
	Filename string
	Data     []uint8
}

type Command []string

type GUI struct {
	SetImage  chan Image
	UserInput chan Input
	Commands  chan Command
	Blob      chan Blob

	// implementations of UI should default to StateRunning
	State chan State

	// AudioSetup should be nil if the emulation is to have no audio
	AudioSetup chan AudioSetup

	// gui receives a string (last selected file) and returns result over the same channel
	FileRequest   chan string
	RequestedFile chan string

	// display an error message
	ErrorDialog chan string

	// optional function called by GUI during it's update loop
	UpdateGUI func() error
}

type Image struct {
	Main    *image.RGBA
	Overlay *image.RGBA
	Prev    *image.RGBA

	// the ID of the image
	ID string

	// the x/y coordinates of the next pixel to be drawn to Main
	Cursor [2]int
}

type Input struct {
	Port   Port
	Action Action
	Data   any
}

type PaddleFireData struct {
	Paddle int // 0 or 1 to indicate which paddle in the pair
	Fire   bool
}

type PaddleMoveData struct {
	Paddle int // 0 or 1 to indicate which paddle in the pair
	Delta  int // distance moved by paddle device
}

type Port int

type State int

type TrakballMoveData struct {
	DeltaX int
	DeltaY int
}