func (j *JoystickDriver) Start() bool {
go func() {
var event sdl.Event
for {
for event = sdl.PollEvent(); event != nil; event = sdl.PollEvent() {
switch data := event.(type) {
case *sdl.JoyAxisEvent:
if data.Which == j.adaptor().joystick.InstanceID() {
axis := j.findName(data.Axis, j.config.Axis)
if axis == "" {
fmt.Println("Unknown Axis:", data.Axis)
} else {
gobot.Publish(j.Event(axis), data.Value)
}
}
case *sdl.JoyButtonEvent:
if data.Which == j.adaptor().joystick.InstanceID() {
button := j.findName(data.Button, j.config.Buttons)
if button == "" {
fmt.Println("Unknown Button:", data.Button)
} else {
if data.State == 1 {
gobot.Publish(j.Event(fmt.Sprintf("%s_press", button)), nil)
} else {
gobot.Publish(j.Event(fmt.Sprintf("%s_release", button)), nil)
}
}
}
case *sdl.JoyHatEvent:
if data.Which == j.adaptor().joystick.InstanceID() {
hat := j.findHatName(data.Value, data.Hat, j.config.Hats)
if hat == "" {
fmt.Println("Unknown Hat:", data.Hat, data.Value)
} else {
gobot.Publish(j.Event(hat), true)
}
}
}
}
time.Sleep(10 * time.Millisecond)
}
}()
return true
}
// NewJoystickDriver returns a new JoystickDriver with a polling interval of
// 10 Milliseconds given a JoystickAdaptor, name and json button configuration
// file location.
//
// Optinally accepts:
// time.Duration: Interval at which the JoystickDriver is polled for new information
func NewJoystickDriver(a *JoystickAdaptor, name string, config string, v ...time.Duration) *JoystickDriver {
d := &JoystickDriver{
name: name,
connection: a,
Eventer: gobot.NewEventer(),
configPath: config,
poll: func() sdl.Event {
return sdl.PollEvent()
},
interval: 10 * time.Millisecond,
halt: make(chan bool, 0),
}
if len(v) > 0 {
d.interval = v[0]
}
d.AddEvent("error")
return d
}