Fixed LED state watcher to consider unknown initial state

hid/keyboard_led.go

@@ -32,6 +32,7 @@ type HIDKeyboardLEDStateWatcher struct {
 	listeners *listenersmap
 	listenerNonZeroCondLock *sync.Mutex
 	listenerNonZeroCond *sync.Cond
+	hasInitialSate bool
 }
 
 type listenersmap struct {
@@ -149,6 +150,25 @@ func (watcher *HIDKeyboardLEDStateWatcher) dispatchListeners(state byte) {
 		hasChanged = true
 	}
 
+	if !watcher.hasInitialSate {
+		//This is the first led state reported, so former state is undefined and we consider everything as a change
+		watcher.ledState.NumLock = nNum
+		watcher.ledState.CapsLock = nCaps
+		watcher.ledState.ScrollLock = nScroll
+		watcher.ledState.Compose = nCompose
+		watcher.ledState.Kana = nKana
+
+		ledsChanged.NumLock = true
+		ledsChanged.CapsLock = true
+		ledsChanged.ScrollLock = true
+		ledsChanged.Compose = true
+		ledsChanged.Kana = true
+
+		hasChanged = true
+
+		watcher.hasInitialSate = true //don't do this again
+	}
+
 	//check if we have listeners ready to remove
 	rmList := make([]*HIDKeyboardLEDListener,0)
 	for l,_ := range watcher.listeners.m {

testhid.go

@@ -80,8 +80,6 @@ func main() {
 	}
 
 
-	//keyboard, err := hid.NewKeyboard("/dev/hidg0", "keymaps")
-	if err != nil { fmt.Println(err)}
 	hidCtl.Keyboard.KeyDelay = 100
 //	hidCtl.Keyboard.KeyDelayJitter = 200
 	fmt.Printf("Available language maps:\n%v\n",hidCtl.Keyboard.ListLanguageMapNames())