Send willDisappear and didDisappear on modal dismiss (#1150)

also report type as ScreenChangedEvent instead of navBarButtonPress.
closes #1144

android/app/src/main/java/com/reactnativenavigation/bridge/EventEmitter.java

         this.reactGateway = reactGateway;
     }
 
+    public void sendScreenChangedEvent(String eventId, String navigatorEventId) {
+        WritableMap map = Arguments.createMap();
+        map.putString("type", "ScreenChangedEvent");
+        sendNavigatorEvent(eventId, navigatorEventId, map);
+    }
+
     public void sendNavigatorEvent(String eventId, String navigatorEventId) {
         if (!NavigationApplication.instance.isReactContextInitialized()) {
             return;

android/app/src/main/java/com/reactnativenavigation/controllers/Modal.java

 import android.view.WindowManager;
 
 import com.facebook.react.bridge.Callback;
+import com.reactnativenavigation.NavigationApplication;
 import com.reactnativenavigation.R;
 import com.reactnativenavigation.layouts.Layout;
 import com.reactnativenavigation.layouts.ModalScreenLayout;
         }
     }
 
+    @Override
+    public void dismiss() {
+        NavigationApplication.instance.getEventEmitter().sendScreenChangedEvent("willDisappear", layout.getCurrentScreen().getNavigatorEventId());
+        NavigationApplication.instance.getEventEmitter().sendScreenChangedEvent("didDisappear", layout.getCurrentScreen().getNavigatorEventId());
+        super.dismiss();
+    }
+
     @Override
     public void onDismiss(DialogInterface dialog) {
         if (isDestroyed) {

android/app/src/main/java/com/reactnativenavigation/screens/Screen.java

     public abstract void setOnDisplayListener(OnDisplayListener onContentViewDisplayedListener);
 
     public void show() {
-        NavigationApplication.instance.getEventEmitter().sendNavigatorEvent("willAppear", screenParams.getNavigatorEventId());
-        NavigationApplication.instance.getEventEmitter().sendNavigatorEvent("didAppear", screenParams.getNavigatorEventId());
+        NavigationApplication.instance.getEventEmitter().sendScreenChangedEvent("willAppear", screenParams.getNavigatorEventId());
+        NavigationApplication.instance.getEventEmitter().sendScreenChangedEvent("didAppear", screenParams.getNavigatorEventId());
         screenAnimator.show(screenParams.animateScreenTransitions);
     }
 
     public void show(boolean animated) {
-        NavigationApplication.instance.getEventEmitter().sendNavigatorEvent("willAppear", screenParams.getNavigatorEventId());
-        NavigationApplication.instance.getEventEmitter().sendNavigatorEvent("didAppear", screenParams.getNavigatorEventId());
+        NavigationApplication.instance.getEventEmitter().sendScreenChangedEvent("willAppear", screenParams.getNavigatorEventId());
+        NavigationApplication.instance.getEventEmitter().sendScreenChangedEvent("didAppear", screenParams.getNavigatorEventId());
         screenAnimator.show(animated);
     }
 
     public void show(boolean animated, Runnable onAnimationEnd) {
-        NavigationApplication.instance.getEventEmitter().sendNavigatorEvent("willAppear", screenParams.getNavigatorEventId());
-        NavigationApplication.instance.getEventEmitter().sendNavigatorEvent("didAppear", screenParams.getNavigatorEventId());
+        NavigationApplication.instance.getEventEmitter().sendScreenChangedEvent("willAppear", screenParams.getNavigatorEventId());
+        NavigationApplication.instance.getEventEmitter().sendScreenChangedEvent("didAppear", screenParams.getNavigatorEventId());
         setStyle();
         screenAnimator.show(animated, onAnimationEnd);
     }
     }
 
     private void hide(boolean animated, Runnable onAnimatedEnd) {
-        NavigationApplication.instance.getEventEmitter().sendNavigatorEvent("willDisappear", screenParams.getNavigatorEventId());
-        NavigationApplication.instance.getEventEmitter().sendNavigatorEvent("didDisappear", screenParams.getNavigatorEventId());
+        NavigationApplication.instance.getEventEmitter().sendScreenChangedEvent("willDisappear", screenParams.getNavigatorEventId());
+        NavigationApplication.instance.getEventEmitter().sendScreenChangedEvent("didDisappear", screenParams.getNavigatorEventId());
         screenAnimator.hide(animated, onAnimatedEnd);
     }
 

android/app/src/main/java/com/reactnativenavigation/screens/ScreenStack.java

             @Override
             public void onDisplay() {
                 if (isStackVisible) {
-                    NavigationApplication.instance.getEventEmitter().sendNavigatorEvent("willAppear", stack.peek().getNavigatorEventId());
-                    NavigationApplication.instance.getEventEmitter().sendNavigatorEvent("didAppear", stack.peek().getNavigatorEventId());
+                    NavigationApplication.instance.getEventEmitter().sendScreenChangedEvent("willAppear", stack.peek().getNavigatorEventId());
+                    NavigationApplication.instance.getEventEmitter().sendScreenChangedEvent("didAppear", stack.peek().getNavigatorEventId());
                 }
             }
         });
                                           @Nullable final Screen.OnDisplayListener onDisplay) {
         nextScreen.setVisibility(View.INVISIBLE);
         addScreen(nextScreen, layoutParams);
-        NavigationApplication.instance.getEventEmitter().sendNavigatorEvent("willDisappear", previousScreen.getNavigatorEventId());
+        NavigationApplication.instance.getEventEmitter().sendScreenChangedEvent("willDisappear", previousScreen.getNavigatorEventId());
         nextScreen.setOnDisplayListener(new Screen.OnDisplayListener() {
             @Override
             public void onDisplay() {
                     @Override
                     public void run() {
                         if (onDisplay != null) onDisplay.onDisplay();
-                        NavigationApplication.instance.getEventEmitter().sendNavigatorEvent("didDisappear", previousScreen.getNavigatorEventId());
+                        NavigationApplication.instance.getEventEmitter().sendScreenChangedEvent("didDisappear", previousScreen.getNavigatorEventId());
                         parent.removeView(previousScreen);
                     }
                 });
 
     private void readdPrevious(Screen previous) {
         previous.setVisibility(View.VISIBLE);
-        NavigationApplication.instance.getEventEmitter().sendNavigatorEvent("willAppear", previous.getNavigatorEventId());
-        NavigationApplication.instance.getEventEmitter().sendNavigatorEvent("didAppear", previous.getNavigatorEventId());
+        NavigationApplication.instance.getEventEmitter().sendScreenChangedEvent("willAppear", previous.getNavigatorEventId());
+        NavigationApplication.instance.getEventEmitter().sendScreenChangedEvent("didAppear", previous.getNavigatorEventId());
         parent.addView(previous, 0);
     }
 
         isStackVisible = true;
         stack.peek().setStyle();
         stack.peek().setVisibility(View.VISIBLE);
-        NavigationApplication.instance.getEventEmitter().sendNavigatorEvent("willAppear", stack.peek().getNavigatorEventId());
-        NavigationApplication.instance.getEventEmitter().sendNavigatorEvent("didAppear", stack.peek().getNavigatorEventId());
+        NavigationApplication.instance.getEventEmitter().sendScreenChangedEvent("willAppear", stack.peek().getNavigatorEventId());
+        NavigationApplication.instance.getEventEmitter().sendScreenChangedEvent("didAppear", stack.peek().getNavigatorEventId());
     }
 
     public void hide() {
-        NavigationApplication.instance.getEventEmitter().sendNavigatorEvent("willDisappear", stack.peek().getNavigatorEventId());
-        NavigationApplication.instance.getEventEmitter().sendNavigatorEvent("didDisappear", stack.peek().getNavigatorEventId());
+        NavigationApplication.instance.getEventEmitter().sendScreenChangedEvent("willDisappear", stack.peek().getNavigatorEventId());
+        NavigationApplication.instance.getEventEmitter().sendScreenChangedEvent("didDisappear", stack.peek().getNavigatorEventId());
         isStackVisible = false;
         stack.peek().setVisibility(View.INVISIBLE);
     }