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keyboard_driver.go
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/
keyboard_driver.go
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package keyboard
import (
"log"
"os"
"github.com/hybridgroup/gobot"
)
const (
// Keyboard event
Key = "key"
)
type KeyboardDriver struct {
name string
connect func(*KeyboardDriver) (err error)
listen func(*KeyboardDriver)
stdin *os.File
gobot.Eventer
}
func NewKeyboardDriver(name string) *KeyboardDriver {
k := &KeyboardDriver{
name: name,
connect: func(k *KeyboardDriver) (err error) {
if err := configure(); err != nil {
return err
}
k.stdin = os.Stdin
return
},
listen: func(k *KeyboardDriver) {
ctrlc := bytes{3}
for {
var keybuf bytes
k.stdin.Read(keybuf[0:3])
if keybuf == ctrlc {
proc, err := os.FindProcess(os.Getpid())
if err != nil {
log.Fatal(err)
}
proc.Signal(os.Interrupt)
break
}
k.Publish(Key, Parse(keybuf))
}
},
Eventer: gobot.NewEventer(),
}
k.AddEvent(Key)
return k
}
func (k *KeyboardDriver) Name() string { return k.name }
func (k *KeyboardDriver) Connection() gobot.Connection { return nil }
// Start initializes keyboard by grabbing key events as they come in and
// publishing a key event
func (k *KeyboardDriver) Start() (errs []error) {
if err := k.connect(k); err != nil {
return []error{err}
}
go k.listen(k)
return
}
// Halt stops camera driver
func (k *KeyboardDriver) Halt() (errs []error) {
if originalState != "" {
return restore()
}
return
}