Detect device orientation change

cocos2d-x C++
#1

Is it possible to detect device orientation change? Maybe thare are some functions like IsPortrait() or IsLandscape() or is it possible to register a callback function for orientation change? That would be great. I need this because I want to support both landscape and portrait modes in my simple app.

Can I find somewhere some kind of c*+ wrapper for common ios functionallity like in-app purchases and gamecenter? A c*+ class with functions like SendScore(char* leaderboard) or OpenLeaderboard(char* name) would be great :slight_smile: If anyone has something like this please share :wink:

#2

Ok I found a solution how to detect ios device orientation change and how to support both portrait and landscape resolution. In case someone needs this then this seems to be working with cocos2d-x 2.0.4 however this might not be the best solution :wink: :

changes in RootViewController.mm:

// Override to allow orientations other than the default portrait orientation.
// This method is deprecated on ios6
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
    return UIInterfaceOrientationIsLandscape( interfaceOrientation ) || UIInterfaceOrientationIsPortrait(interfaceOrientation);
}

// For ios6, use supportedInterfaceOrientations & shouldAutorotate instead
- (NSUInteger) supportedInterfaceOrientations{
#ifdef __IPHONE_6_0
    return UIInterfaceOrientationMaskAll;
#endif
}

in AppController.h:

@interface AppController : NSObject  {
    UIWindow *window;
    RootViewController    *viewController;
}

-(void) orientationDidChanged:(NSNotification*)notification;

@property (nonatomic, retain) UIWindow *window;
@property (nonatomic, retain) RootViewController *viewController;

@end

in AppController.mm:

[...]
[[UIApplication sharedApplication] setStatusBarHidden: YES];

    cocos2d::CCApplication::sharedApplication()->run();

    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(orientationDidChanged:) name:@"UIDeviceOrientationDidChangeNotification" object:nil];

    return YES;
}

-(void) orientationDidChanged:(NSNotification*)notification
{
    UIDeviceOrientation orientation = [[UIApplication sharedApplication] statusBarOrientation];
    if (orientation == UIDeviceOrientationPortrait || orientation == UIDeviceOrientationPortraitUpsideDown)
    {
        cocos2d::CCSize s = cocos2d::CCEGLView::sharedOpenGLView()->getFrameSize();
        if (s.width < s.height)
            cocos2d::CCEGLView::sharedOpenGLView()->setFrameSize(s.width, s.height);
        else
            cocos2d::CCEGLView::sharedOpenGLView()->setFrameSize(s.height, s.width);
        cocos2d::CCEGLView::sharedOpenGLView()->setDesignResolutionSize(640, 960, kResolutionShowAll);
    }
    else if (orientation == UIDeviceOrientationLandscapeLeft || orientation == UIDeviceOrientationLandscapeRight)
    {
        cocos2d::CCSize s = cocos2d::CCEGLView::sharedOpenGLView()->getFrameSize();
        if (s.width > s.height)
            cocos2d::CCEGLView::sharedOpenGLView()->setFrameSize(s.width, s.height);
        else
            cocos2d::CCEGLView::sharedOpenGLView()->setFrameSize(s.height, s.width);
        cocos2d::CCEGLView::sharedOpenGLView()->setDesignResolutionSize(640, 960, kResolutionShowAll);
    }

}
[...]
1 Like
#3

@neno Did this work for you as expected ? I need it as well.

1 Like
#4

I’ve been struggling to get this to work as well. Android, great – iOS, every single release changes the orientation API -_-

#5

Hi @TheChuckster, @jarsj

orientationDidChanged Notification will trigger only When Device is in Unlocked State(i.e Portrait Lock disabled) & Rotate Device to Landscape or Portrait.
If Device is in Portrait Locked then [[UIDevice currentDevice] orientation] will be always UIDeviceOrientationPortrait. If there is any changes in Device Orientation we won’t get any notification callback.

I have Used Accelerometer Value to Find out the Orientation.

if (fabs(AccelerometerData.acceleration.y) <  fabs(AccelerometerData.acceleration.x))
{
    if(AccelerometerData.acceleration.x > 0)
        currentOrientaion = 2; //UIDeviceOrientationLandscapeLeft
    else
        currentOrientaion = 3; // UIDeviceOrientationLandscapeRight
}
else
{
    if(AccelerometerData.acceleration.y > 0)
        currentOrientaion = 4;  //    UIDeviceOrientationPortraitUpsideDown
    else
        currentOrientaion = 1;   //UIDeviceOrientationPortrait
 }

Regards,
Gurudath

1 Like
#6

That’s one way of doing it (sad that it comes down to that – I bet it rapidly ping pongs between orientations if it’s flat on the ground, easy fix is to threshold it).

#7

Yes.

When it is flat on the ground we can see changes in Orientation Value.
I have Taken Difference Between Acceleration Y & X Value and fixed it by using threshold value.