Emit SideMenu visibility events (#5149)

lib/android/app/src/main/java/com/reactnativenavigation/viewcontrollers/sidemenu/SideMenuController.java

 	private ViewController left;
 	private ViewController right;
     private SideMenuPresenter presenter;
+    private float prevLeftSlideOffset = 0;
+    private float prevRightSlideOffset = 0;
 
     public SideMenuController(Activity activity, ChildControllersRegistry childRegistry, String id, Options initialOptions, SideMenuPresenter sideMenuOptionsPresenter, Presenter presenter) {
 		super(activity, childRegistry, id, presenter, initialOptions);
     @Override
     public void onDrawerOpened(@NonNull View drawerView) {
         ViewController view = this.getMatchingView(drawerView);
-        view.mergeOptions(this.getOptionsWithVisability(this.viewIsLeft(drawerView), true));
-        view.onViewAppeared();
+        view.mergeOptions(this.getOptionsWithVisibility(this.viewIsLeft(drawerView), true));
     }
 
     @Override
     public void onDrawerClosed(@NonNull View drawerView) {
         ViewController view = this.getMatchingView(drawerView);
-        view.mergeOptions(this.getOptionsWithVisability(this.viewIsLeft(drawerView), false));
-        view.onViewDisappear();
+        view.mergeOptions(this.getOptionsWithVisibility(this.viewIsLeft(drawerView), false));
+    }
+
+    @Override
+    public void onDrawerSlide(@NonNull View drawerView, float slideOffset) {
+        int gravity = getSideMenuGravity(drawerView);
+        if (gravity == Gravity.LEFT) {
+            dispatchSideMenuVisibilityEvents(left, prevLeftSlideOffset, slideOffset);
+            prevLeftSlideOffset = slideOffset;
+        } else if (gravity == Gravity.RIGHT) {
+            dispatchSideMenuVisibilityEvents(right, prevRightSlideOffset, slideOffset);
+            prevRightSlideOffset = slideOffset;
+        }
+    }
+
+    @Override
+    public void onDrawerStateChanged(int newState) {
+
     }
 
     @Override
 
     public void setLeftController(ViewController controller) {
         this.left = controller;
-        int height = this.getHeight(options.sideMenuRootOptions.left);
-        int width = this.getWidth(options.sideMenuRootOptions.left);
+        int height = getHeight(options.sideMenuRootOptions.left);
+        int width = getWidth(options.sideMenuRootOptions.left);
         getView().addView(controller.getView(), new LayoutParams(width, height, Gravity.LEFT));
     }
 
     public void setRightController(ViewController controller) {
         this.right = controller;
-        int height = this.getHeight(options.sideMenuRootOptions.right);
-        int width = this.getWidth(options.sideMenuRootOptions.right);
+        int height = getHeight(options.sideMenuRootOptions.right);
+        int width = getWidth(options.sideMenuRootOptions.right);
         getView().addView(controller.getView(), new LayoutParams(width, height, Gravity.RIGHT));
     }
 
         return (left != null && drawerView.equals(left.getView()));
     }
 
-    private Options getOptionsWithVisability ( boolean isLeft, boolean visible ) {
+    private int getSideMenuGravity(View drawerView) {
+        return ((LayoutParams) drawerView.getLayoutParams()).gravity;
+    }
+
+    private Options getOptionsWithVisibility(boolean isLeft, boolean visible ) {
         Options options = new Options();
         if (isLeft) {
             options.sideMenuRootOptions.left.visible = new Bool(visible);
         return options;
     }
 
-    @Override
-    public void onDrawerSlide(@NonNull View drawerView, float slideOffset) {
-
-    }
-
-    @Override
-    public void onDrawerStateChanged(int newState) {
-
+    private void dispatchSideMenuVisibilityEvents(ViewController drawer, float prevOffset, float offset) {
+        if (prevOffset == 0 && offset> 0) {
+            drawer.onViewAppeared();
+        } else if (prevOffset > 0 && offset == 0) {
+            drawer.onViewDisappear();
+        }
     }
 }

lib/android/app/src/test/java/com/reactnativenavigation/viewcontrollers/sidemenu/SideMenuControllerTest.java

 import android.content.res.Resources;
 import android.util.TypedValue;
 import android.view.Gravity;
+import android.view.View;
 import android.view.ViewGroup.LayoutParams;
+import android.view.Window;
 
 import com.reactnativenavigation.BaseTest;
 import com.reactnativenavigation.mocks.SimpleComponentViewController;
-import com.reactnativenavigation.parse.*;
+import com.reactnativenavigation.parse.Options;
+import com.reactnativenavigation.parse.SideMenuOptions;
 import com.reactnativenavigation.parse.params.Bool;
 import com.reactnativenavigation.parse.params.Number;
 import com.reactnativenavigation.parse.params.Text;
 import com.reactnativenavigation.presentation.Presenter;
 import com.reactnativenavigation.presentation.SideMenuPresenter;
-import com.reactnativenavigation.utils.*;
+import com.reactnativenavigation.utils.CommandListenerAdapter;
+import com.reactnativenavigation.utils.Functions;
 import com.reactnativenavigation.viewcontrollers.ChildControllersRegistry;
 import com.reactnativenavigation.viewcontrollers.ParentController;
 import com.reactnativenavigation.viewcontrollers.ViewController;
 import static org.mockito.Mockito.spy;
 import static org.mockito.Mockito.times;
 import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
 
 @SuppressWarnings("MagicNumber")
 public class SideMenuControllerTest extends BaseTest {
 
     @Override
     public void beforeEach() {
-        activity = newActivity();
+        activity = createActivity();
+
         childRegistry = new ChildControllersRegistry();
         presenter = spy(new SideMenuPresenter());
         child = new SimpleComponentViewController(activity, childRegistry, "child", new Options());
         options.sideMenuRootOptions.right.animate = new Bool(false);
         uut.mergeOptions(options);
     }
+
+    private Activity createActivity() {
+        Activity activity = spy(newActivity());
+        Window window = Mockito.mock(Window.class);
+        when(window.getDecorView()).thenReturn(Mockito.mock(View.class));
+        when(activity.getWindow()).thenReturn(window);
+        return activity;
+    }
 }