Add support for 'hand' and 'gesture' Leap Motion events

examples/leap_motion_gestures.go

@@ -0,0 +1,35 @@
+package main
+
+import (
+	"fmt"
+
+	"github.com/hybridgroup/gobot"
+	"github.com/hybridgroup/gobot/platforms/leap"
+)
+
+func main() {
+	gbot := gobot.NewGobot()
+
+	leapMotionAdaptor := leap.NewLeapMotionAdaptor("leap", "127.0.0.1:6437")
+	l := leap.NewLeapMotionDriver(leapMotionAdaptor, "leap")
+
+	work := func() {
+		gobot.On(l.Event("gesture"), func(data interface{}) {
+			printGesture(data.(leap.Gesture))
+		})
+	}
+
+	robot := gobot.NewRobot("leapBot",
+		[]gobot.Connection{leapMotionAdaptor},
+		[]gobot.Device{l},
+		work,
+	)
+
+	gbot.AddRobot(robot)
+
+	gbot.Start()
+}
+
+func printGesture(gesture leap.Gesture) {
+	fmt.Println("Gesture", gesture)
+}

examples/leap_motion_hands.go

@@ -14,8 +14,8 @@ func main() {
 	l := leap.NewLeapMotionDriver(leapMotionAdaptor, "leap")
 
 	work := func() {
-		gobot.On(l.Event("message"), func(data interface{}) {
-			printHands(data.(leap.Frame))
+		gobot.On(l.Event("hand"), func(data interface{}) {
+			printHand(data.(leap.Hand))
 		})
 	}
 
@@ -30,8 +30,6 @@ func main() {
 	gbot.Start()
 }
 
-func printHands(frame leap.Frame) {
-	for key, hand := range frame.Hands {
-		fmt.Println("Hand", key, hand)
-	}
+func printHand(hand leap.Hand) {
+	fmt.Println("Hand", hand)
 }

platforms/leap/leap_motion_driver.go

@@ -24,6 +24,8 @@ var receive = func(ws io.ReadWriteCloser, msg *[]byte) {
 //
 // Adds the following events:
 //		"message" - Gets triggered when receiving a message from leap motion
+//		"hand" - Gets triggered per-message when leap motion detects a hand
+//		"gesture" - Gets triggered per-message when leap motion detects a hand
 func NewLeapMotionDriver(a *LeapMotionAdaptor, name string) *LeapMotionDriver {
 	l := &LeapMotionDriver{
 		name:       name,
@@ -32,6 +34,8 @@ func NewLeapMotionDriver(a *LeapMotionAdaptor, name string) *LeapMotionDriver {
 	}
 
 	l.AddEvent("message")
+	l.AddEvent("hand")
+	l.AddEvent("gesture")
 	return l
 }
 func (l *LeapMotionDriver) Name() string                 { return l.name }
@@ -47,6 +51,8 @@ func (l *LeapMotionDriver) adaptor() *LeapMotionAdaptor {
 //
 // Publishes the following events:
 //		"message" - Emits Frame on new message received from Leap.
+//		"hand" - Emits Hand when detected in message from Leap.
+//		"gesture" - Emits Gesture when detected in message from Leap.
 func (l *LeapMotionDriver) Start() (errs []error) {
 	enableGestures := map[string]bool{"enableGestures": true}
 	b, err := json.Marshal(enableGestures)
@@ -60,9 +66,19 @@ func (l *LeapMotionDriver) Start() (errs []error) {
 
 	go func() {
 		var msg []byte
+		var frame Frame
 		for {
 			receive(l.adaptor().ws, &msg)
-			gobot.Publish(l.Event("message"), l.ParseFrame(msg))
+			frame = l.ParseFrame(msg)
+			gobot.Publish(l.Event("message"), frame)
+
+			for _, hand := range frame.Hands {
+				gobot.Publish(l.Event("hand"), hand)
+			}
+
+			for _, gesture := range frame.Gestures {
+				gobot.Publish(l.Event("gesture"), gesture)
+			}
 		}
 	}()