//==============================
// VRMenuEventHandler::Frame
void VRMenuEventHandler::Frame( OvrGuiSys & guiSys, VrFrame const & vrFrame, 
        menuHandle_t const & rootHandle, Posef const & menuPose, Array< VRMenuEvent > & events )
{
	VRMenuObject * root = guiSys.GetVRMenuMgr().ToObject( rootHandle );
	if ( root == NULL )
	{
		return;
	}

	// find the object the gaze is touching and update gaze focus
	const Matrix4f viewMatrix = guiSys.GetApp()->GetLastViewMatrix();
	const Vector3f viewPos( GetViewMatrixPosition( viewMatrix ) );
	const Vector3f viewFwd( GetViewMatrixForward( viewMatrix ) );

	HitTestResult result;
	menuHandle_t hitHandle = root->HitTest( guiSys, menuPose, viewPos, viewFwd, ContentFlags_t( CONTENT_SOLID ), result );
	result.RayStart = viewPos;
	result.RayDir = viewFwd;

	VRMenuObject * hit = hitHandle.IsValid() ? guiSys.GetVRMenuMgr().ToObject( hitHandle ) : NULL;
/*
	if ( hit != NULL )
	{
		guiSys.GetApp()->ShowInfoText( 0.0f, "%s", hit->GetText().ToCStr() );
	}
*/
	bool focusChanged = ( hitHandle != FocusedHandle );
	if ( focusChanged )
	{
		// focus changed
		VRMenuObject * oldFocus = guiSys.GetVRMenuMgr().ToObject( FocusedHandle );
		if ( oldFocus != NULL )
		{
			// setup event for item losing the focus
			VRMenuEvent event( VRMENU_EVENT_FOCUS_LOST, EVENT_DISPATCH_TARGET, FocusedHandle, Vector3f( 0.0f ), result );
			events.PushBack( event );
		}
		if ( hit != NULL )
		{
			if ( ( hit->GetFlags() & VRMENUOBJECT_FLAG_NO_FOCUS_GAINED ) == 0 )
			{
				// set up event for item gaining the focus
				VRMenuEvent event( VRMENU_EVENT_FOCUS_GAINED, EVENT_DISPATCH_FOCUS, hitHandle, Vector3f( 0.0f ), result );
				events.PushBack( event );
			}
		}
		FocusedHandle = hitHandle;
	}

	if ( ( vrFrame.Input.buttonPressed & BUTTON_SWIPE_UP ) != 0 )
	{
		VRMenuEvent event( VRMENU_EVENT_SWIPE_UP, EVENT_DISPATCH_FOCUS, FocusedHandle, Vector3f( 0.0f ), result );
		events.PushBack( event );
	}
	if ( ( vrFrame.Input.buttonPressed & BUTTON_SWIPE_DOWN ) != 0 )
	{
		VRMenuEvent event( VRMENU_EVENT_SWIPE_DOWN, EVENT_DISPATCH_FOCUS, FocusedHandle, Vector3f( 0.0f ), result );
		events.PushBack( event );

	}
	if ( ( vrFrame.Input.buttonPressed & BUTTON_SWIPE_FORWARD ) != 0 )
	{
		VRMenuEvent event( VRMENU_EVENT_SWIPE_FORWARD, EVENT_DISPATCH_FOCUS, FocusedHandle, Vector3f( 0.0f ), result );
		events.PushBack( event );

	}
	if ( ( vrFrame.Input.buttonPressed & BUTTON_SWIPE_BACK ) != 0 )
	{
		VRMenuEvent event( VRMENU_EVENT_SWIPE_BACK, EVENT_DISPATCH_FOCUS, FocusedHandle, Vector3f( 0.0f ), result );
		events.PushBack( event );
	}

	bool touchPressed = ( vrFrame.Input.buttonPressed & ( BUTTON_TOUCH | BUTTON_A ) ) != 0;
	bool touchReleased = !touchPressed && ( vrFrame.Input.buttonReleased & ( BUTTON_TOUCH | BUTTON_A ) ) != 0;
	bool touchDown = ( vrFrame.Input.buttonState & BUTTON_TOUCH ) != 0;

	// Need to update this for keyboard events as well
	for ( int i = 0; i < vrFrame.Input.NumKeyEvents; i++ )
	{
		if ( vrFrame.Input.KeyEvents[i].KeyCode == OVR_KEY_RETURN )
		{
			switch ( vrFrame.Input.KeyEvents[i].EventType )
			{
				case KEY_EVENT_DOWN:
					touchPressed = true;
					break;
				case KEY_EVENT_UP:
					touchReleased = true;
					break;
				default:
					break;
			}
		}
	}

 /*   
	// report swipe data
	char const * swipeNames[5] = { "none", "down", "up", "back", "forward" };
	int swipeUpDown = ( vrFrame.Input.buttonPressed & BUTTON_SWIPE_UP ) ? 2 : 0;
	swipeUpDown = ( vrFrame.Input.buttonPressed & BUTTON_SWIPE_DOWN ) ? 1 : swipeUpDown;
	int swipeForwardBack = ( vrFrame.Input.buttonPressed & BUTTON_SWIPE_FORWARD ) ? 4 : 0;
	swipeForwardBack = ( vrFrame.Input.buttonPressed & BUTTON_SWIPE_BACK ) ? 3 : swipeForwardBack;
 
	guiSys.GetApp()->ShowInfoText( 1.0f, "touch %s\n( %s, %s )\n( %.2f, %.2f )\n( %.2f, %.2f )", 
			touchDown ? swipeNames[1] : swipeNames[2],
			swipeNames[swipeUpDown], swipeNames[swipeForwardBack], 
			vrFrame.Input.touch[0], vrFrame.Input.touch[1],
			vrFrame.Input.touchRelative[0], vrFrame.Input.touchRelative[1] );
*/
	// if nothing is focused, send events to the root
	if ( touchPressed )
	{
		VRMenuEvent event( VRMENU_EVENT_TOUCH_DOWN, EVENT_DISPATCH_FOCUS, FocusedHandle, Vector3f( 0.0f ), result );
		events.PushBack( event );
	}
	if ( touchReleased )
	{
		VRMenuEvent event( VRMENU_EVENT_TOUCH_UP, EVENT_DISPATCH_FOCUS, FocusedHandle, Vector3f( vrFrame.Input.touchRelative, 0.0f ), result );
		events.PushBack( event );
	}
	if ( touchDown )
	{
		if ( vrFrame.Input.touchRelative.LengthSq() > Mathf::SmallestNonDenormal )
		{
			VRMenuEvent event( VRMENU_EVENT_TOUCH_RELATIVE, EVENT_DISPATCH_FOCUS, FocusedHandle, Vector3f( vrFrame.Input.touchRelative, 0.0f ), result );
			events.PushBack( event );
		}
		VRMenuEvent event( VRMENU_EVENT_TOUCH_ABSOLUTE, EVENT_DISPATCH_FOCUS, FocusedHandle, Vector3f( vrFrame.Input.touch, 0.0f ), result );
		events.PushBack( event );
	}

	{
		// always post the frame event to the root
		VRMenuEvent event( VRMENU_EVENT_FRAME_UPDATE, EVENT_DISPATCH_BROADCAST, menuHandle_t(), Vector3f( 0.0f ), result );
		events.PushBack( event );
	}
}
//==============================
// VRMenuEventHandler::Frame
void VRMenuEventHandler::Frame( App * app, VrFrame const & vrFrame, OvrVRMenuMgr & menuMgr, BitmapFont const & font,
                                menuHandle_t const & rootHandle,Posef const & menuPose, gazeCursorUserId_t const & gazeUserId,
                                Array< VRMenuEvent > & events )
{
    VRMenuObject * root = menuMgr.ToObject( rootHandle );
    if ( root == NULL )
    {
        return;
    }

    // find the object the gaze is touching and update gaze focus
    const Matrix4f viewMatrix = app->GetLastViewMatrix();
    const Vector3f viewPos( GetViewMatrixPosition( viewMatrix ) );
    const Vector3f viewFwd( GetViewMatrixForward( viewMatrix ) );

    HitTestResult result;
    menuHandle_t hitHandle = root->HitTest( app, menuMgr, font, menuPose, viewPos, viewFwd, ContentFlags_t( CONTENT_SOLID ), result );
    result.RayStart = viewPos;
    result.RayDir = viewFwd;

    VRMenuObject * hit = hitHandle.IsValid() ? menuMgr.ToObject( hitHandle ) : NULL;
    app->GetGazeCursor().UpdateForUser( gazeUserId, result.t, ( hit != NULL && !( hit->GetFlags() & VRMenuObjectFlags_t( VRMENUOBJECT_NO_GAZE_HILIGHT ) ) ) ? CURSOR_STATE_HILIGHT : CURSOR_STATE_NORMAL );
    /*
        if ( hit != NULL )
        {
            app->ShowInfoText( 0.0f, "%s", hit->GetText().ToCStr() );
        }
    */
    bool focusChanged = ( hitHandle != FocusedHandle );
    if ( focusChanged )
    {
        // focus changed
        VRMenuObject * oldFocus = menuMgr.ToObject( FocusedHandle );
        if ( oldFocus != NULL )
        {
            // setup event for item losing the focus
            VRMenuEvent event( VRMENU_EVENT_FOCUS_LOST, EVENT_DISPATCH_TARGET, FocusedHandle, Vector3f( 0.0f ), result );
            events.PushBack( event );
        }
        if ( hit != NULL )
        {
            if ( ( hit->GetFlags() & VRMENUOBJECT_FLAG_NO_FOCUS_GAINED ) == 0 )
            {
                // set up event for item gaining the focus
                VRMenuEvent event( VRMENU_EVENT_FOCUS_GAINED, EVENT_DISPATCH_FOCUS, hitHandle, Vector3f( 0.0f ), result );
                events.PushBack( event );
            }
        }
        FocusedHandle = hitHandle;
    }

    bool touchPressed = ( vrFrame.Input.buttonPressed & ( BUTTON_TOUCH | BUTTON_A ) ) != 0;
    bool touchReleased = !touchPressed && ( vrFrame.Input.buttonReleased & ( BUTTON_TOUCH | BUTTON_A ) ) != 0;
    bool touchDown = ( vrFrame.Input.buttonState & BUTTON_TOUCH ) != 0;

    if ( ( vrFrame.Input.buttonPressed & BUTTON_SWIPE_UP ) != 0 )
    {
        VRMenuEvent event( VRMENU_EVENT_SWIPE_UP, EVENT_DISPATCH_FOCUS, FocusedHandle, Vector3f( 0.0f ), result );
        events.PushBack( event );
    }
    if ( ( vrFrame.Input.buttonPressed & BUTTON_SWIPE_DOWN ) != 0 )
    {
        VRMenuEvent event( VRMENU_EVENT_SWIPE_DOWN, EVENT_DISPATCH_FOCUS, FocusedHandle, Vector3f( 0.0f ), result );
        events.PushBack( event );

    }
    if ( ( vrFrame.Input.buttonPressed & BUTTON_SWIPE_FORWARD ) != 0 )
    {
        VRMenuEvent event( VRMENU_EVENT_SWIPE_FORWARD, EVENT_DISPATCH_FOCUS, FocusedHandle, Vector3f( 0.0f ), result );
        events.PushBack( event );

    }
    if ( ( vrFrame.Input.buttonPressed & BUTTON_SWIPE_BACK ) != 0 )
    {
        VRMenuEvent event( VRMENU_EVENT_SWIPE_BACK, EVENT_DISPATCH_FOCUS, FocusedHandle, Vector3f( 0.0f ), result );
        events.PushBack( event );
    }

    /*
       // report swipe data
       char const * swipeNames[5] = { "none", "down", "up", "back", "forward" };
       int swipeUpDown = ( vrFrame.Input.buttonPressed & BUTTON_SWIPE_UP ) ? 2 : 0;
       swipeUpDown = ( vrFrame.Input.buttonPressed & BUTTON_SWIPE_DOWN ) ? 1 : swipeUpDown;
       int swipeForwardBack = ( vrFrame.Input.buttonPressed & BUTTON_SWIPE_FORWARD ) ? 4 : 0;
       swipeForwardBack = ( vrFrame.Input.buttonPressed & BUTTON_SWIPE_BACK ) ? 3 : swipeForwardBack;

       app->ShowInfoText( 1.0f, "touch %s\n( %s, %s )\n( %.2f, %.2f )\n( %.2f, %.2f )",
               touchDown ? swipeNames[1] : swipeNames[2],
               swipeNames[swipeUpDown], swipeNames[swipeForwardBack],
               vrFrame.Input.touch[0], vrFrame.Input.touch[1],
               vrFrame.Input.touchRelative[0], vrFrame.Input.touchRelative[1] );
    */
    // if nothing is focused, send events to the root
    if ( touchPressed )
    {
        VRMenuEvent event( VRMENU_EVENT_TOUCH_DOWN, EVENT_DISPATCH_FOCUS, FocusedHandle, Vector3f( 0.0f ), result );
        events.PushBack( event );
    }
    if ( touchReleased )
    {
        VRMenuEvent event( VRMENU_EVENT_TOUCH_UP, EVENT_DISPATCH_FOCUS, FocusedHandle, Vector3f( vrFrame.Input.touchRelative, 0.0f ), result );
        events.PushBack( event );
    }
    if ( touchDown )
    {
        if ( vrFrame.Input.touchRelative.LengthSq() > Mathf::SmallestNonDenormal )
        {
            VRMenuEvent event( VRMENU_EVENT_TOUCH_RELATIVE, EVENT_DISPATCH_FOCUS, FocusedHandle, Vector3f( vrFrame.Input.touchRelative, 0.0f ), result );
            events.PushBack( event );
        }
        VRMenuEvent event( VRMENU_EVENT_TOUCH_ABSOLUTE, EVENT_DISPATCH_FOCUS, FocusedHandle, Vector3f( vrFrame.Input.touch, 0.0f ), result );
        events.PushBack( event );
    }

    {
        // always post the frame event to the root
        VRMenuEvent event( VRMENU_EVENT_FRAME_UPDATE, EVENT_DISPATCH_BROADCAST, menuHandle_t(), Vector3f( 0.0f ), result );
        events.PushBack( event );
    }
}