Allow controllers to switch the iOS frontend to full screen mode

iOS/GBBackgroundView.h

@@ -8,6 +8,7 @@
 @property (readonly) GBView *gbView;
 @property (nonatomic) GBLayout *layout;
 @property (nonatomic) bool usesSwipePad;
+@property (nonatomic) bool fullScreenMode;
 
 - (void)enterPreviewMode:(bool)showLabel;
 - (void)reloadThemeImages;

iOS/GBBackgroundView.m

@@ -91,6 +91,7 @@ static GB_key_mask_t angleToKeyMask(double angle)
     bool _inDynamicSpeedMode;
     bool _previewMode;
     
+    UIView *_fadeView;
     UIImageView *_dpadView;
     UIImageView *_dpadShadowView;
     UIImageView *_aButtonView;
@@ -104,6 +105,7 @@ static GB_key_mask_t angleToKeyMask(double angle)
     NSTimer *_fadeTimer;
     
     GB_key_mask_t _lastMask;
+    bool _fullScreenMode;
 }
 
 - (void)reloadThemeImages
@@ -142,11 +144,16 @@ static GB_key_mask_t angleToKeyMask(double angle)
     _dpadShadowView.hidden = true;
     _gbView = [[GBViewMetal alloc] initWithFrame:CGRectZero];
     
+    _fadeView = [[UIView alloc] initWithFrame:self.frame];
+    _fadeView.backgroundColor = [UIColor colorWithWhite:0 alpha:0];
+    _fadeView.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
+    
     [self addSubview:_dpadView];
     [self addSubview:_aButtonView];
     [self addSubview:_bButtonView];
     [self addSubview:_startButtonView];
     [self addSubview:_selectButtonView];
+    [self addSubview:_fadeView];
     [self addSubview:_gbView];
     
     [_dpadView addSubview:_dpadShadowView];
@@ -183,6 +190,10 @@ static GB_key_mask_t angleToKeyMask(double angle)
 - (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event
 {
     if (_previewMode) return;
+    if (_fullScreenMode) {
+        self.fullScreenMode = false;
+        return;
+    }
     static const double dpadRadius = 75;
     CGPoint dpadLocation = _layout.dpadLocation;
     double factor = [UIScreen mainScreen].scale;
@@ -460,7 +471,17 @@ static GB_key_mask_t angleToKeyMask(double angle)
     screenFrame.size.width /= [UIScreen mainScreen].scale;
     screenFrame.size.height /= [UIScreen mainScreen].scale;
     
-    _gbView.frame = screenFrame;
+    if (_fullScreenMode) {
+        CGRect fullScreenFrame = layout.fullScreenRect;
+        fullScreenFrame.origin.x /= [UIScreen mainScreen].scale;
+        fullScreenFrame.origin.y /= [UIScreen mainScreen].scale;
+        fullScreenFrame.size.width /= [UIScreen mainScreen].scale;
+        fullScreenFrame.size.height /= [UIScreen mainScreen].scale;
+        _gbView.frame = fullScreenFrame;
+    }
+    else {
+        _gbView.frame = screenFrame;
+    }
     
     screenFrame.origin.x += 8;
     screenFrame.origin.y += 8;
@@ -579,4 +600,21 @@ static GB_key_mask_t angleToKeyMask(double angle)
     _previewMode = true;
 }
 
+- (bool)fullScreenMode
+{
+    return _fullScreenMode;
+}
+
+- (void)setFullScreenMode:(bool)fullScreenMode
+{
+    if (fullScreenMode == _fullScreenMode) return;
+    _fullScreenMode = fullScreenMode;
+    [UIView animateWithDuration:1.0/3 animations:^{
+        // Animating alpha has some weird quirks for some reason
+        _fadeView.backgroundColor = [UIColor colorWithWhite:0 alpha:fullScreenMode];
+        [self setLayout:_layout];
+    }];
+    [self.window.rootViewController setNeedsStatusBarAppearanceUpdate];
+}
+
 @end

iOS/GBHorizontalLayout.m

@@ -14,6 +14,10 @@
     screenRect.size.height = self.hasFractionalPixels? (resolution.height - self.homeBar) : floor((resolution.height - self.homeBar) / 144) * 144;
     screenRect.size.width = screenRect.size.height / 144 * 160;
     
+    screenRect.origin.x = (resolution.width - screenRect.size.width) / 2;
+    screenRect.origin.y = (resolution.height - self.homeBar - screenRect.size.height) / 2;
+    self.fullScreenRect = screenRect;
+    
     double horizontalMargin, verticalMargin;
     while (true) {
         horizontalMargin = (resolution.width - screenRect.size.width) / 2;

iOS/GBLayout.h

@@ -7,6 +7,7 @@
 
 @property (readonly) UIImage *background;
 @property (readonly) CGRect screenRect;
+@property (readonly) CGRect fullScreenRect;
 @property (readonly) CGRect logoRect;
 @property (readonly) CGPoint dpadLocation;
 @property (readonly) CGPoint aLocation;
@@ -23,6 +24,7 @@
 @interface GBLayout()
 @property UIImage *background;
 @property CGRect screenRect;
+@property CGRect fullScreenRect;
 @property CGPoint dpadLocation;
 @property CGPoint aLocation;
 @property CGPoint bLocation;

iOS/GBSettingsViewController.m

@@ -399,11 +399,17 @@ static NSString const *typeLightTemp = @"typeLightTemp";
             ],
             @"footer": ^NSString *(){
                 if ([[NSUserDefaults standardUserDefaults] boolForKey:@"GBSwipeState"]) {
-                    return @"Swipe down on the Game Boy to save the state into state slot 1. Swipe up to load the state from state slot 1";
+                    return @"Swipe down on the Game Boy to save the state into state slot 1. Swipe up to load the state from state slot 1.";
                 }
                 return @" "; // This space is needed, otherwise UITableView spacing breaks
             },
         },
+        @{
+            @"items": @[
+                @{@"type": typeCheck, @"pref": @"GBControllersHideInterface", @"title": @"Hide UI While Using a Controller"},
+            ],
+            @"footer": @"When enabled, the on-screen user interface will be hidden while a game controller is being used."
+        },
         @{
             @"header": @"Enable Rumble",
             @"items": @[

iOS/GBVerticalLayout.m

@@ -14,6 +14,10 @@
     screenRect.size.width = self.hasFractionalPixels? resolution.width : floor(resolution.width / 160) * 160;
     screenRect.size.height = screenRect.size.width / 160 * 144;
     
+    screenRect.origin.x = (resolution.width - screenRect.size.width) / 2;
+    screenRect.origin.y = (resolution.height - screenRect.size.height) / 2;
+    self.fullScreenRect = screenRect;
+    
     double screenBorderWidth = screenRect.size.width / 40;
     screenRect.origin.x = (resolution.width - screenRect.size.width) / 2;
     screenRect.origin.y = self.minY + screenBorderWidth * 2;

iOS/GBViewController.m

@@ -336,6 +336,11 @@ static void rumbleCallback(GB_gameboy_t *gb, double amp)
                                                  name:GCControllerDidConnectNotification
                                                object:nil];
     
+    [[NSNotificationCenter defaultCenter] addObserver:self
+                                             selector:@selector(controllerDisconnected:)
+                                                 name:GCControllerDidDisconnectNotification
+                                               object:nil];
+    
     for (NSString *name in @[UIScreenDidConnectNotification,
                              UIScreenDidDisconnectNotification,
                              UIScreenModeDidChangeNotification]) {
@@ -381,6 +386,12 @@ static void rumbleCallback(GB_gameboy_t *gb, double amp)
     }
 }
 
+- (void)controllerDisconnected:(NSNotification *)notification
+{
+    if (notification.object == _lastController) {
+        _backgroundView.fullScreenMode = false;
+    }
+}
 
 - (void)setControllerHandlers
 {
@@ -419,6 +430,10 @@ static void rumbleCallback(GB_gameboy_t *gb, double amp)
 - (void)controller:(GCController *)controller buttonChanged:(GCControllerButtonInput *)button usage:(GBControllerUsage)usage
 {
     [self updateLastController:controller];
+    if (_running && button.value > 0.25 &&
+        [[NSUserDefaults standardUserDefaults] boolForKey:@"GBControllersHideInterface"]) {
+        _backgroundView.fullScreenMode = true;
+    }
     
     GBButton gbButton = [GBSettingsViewController controller:controller convertUsageToButton:usage];
     static const double analogThreshold = 0.0625;
@@ -488,11 +503,20 @@ static void rumbleCallback(GB_gameboy_t *gb, double amp)
 - (void)controller:(GCController *)controller axisChanged:(GCControllerDirectionPad *)axis usage:(GBControllerUsage)usage
 {
     [self updateLastController:controller];
+    bool left = axis.left.value > 0.5;
+    bool right = axis.right.value > 0.5;
+    bool up = axis.up.value > 0.5;
+    bool down = axis.down.value > 0.5;
     
-    GB_set_key_state(&_gb, GB_KEY_LEFT, axis.left.value > 0.5);
-    GB_set_key_state(&_gb, GB_KEY_RIGHT, axis.right.value > 0.5);
-    GB_set_key_state(&_gb, GB_KEY_UP, axis.up.value > 0.5);
-    GB_set_key_state(&_gb, GB_KEY_DOWN, axis.down.value > 0.5);
+    if (_running && (left || right || up || down ) &&
+        [[NSUserDefaults standardUserDefaults] boolForKey:@"GBControllersHideInterface"]) {
+        _backgroundView.fullScreenMode = true;
+    }
+    
+    GB_set_key_state(&_gb, GB_KEY_LEFT, left);
+    GB_set_key_state(&_gb, GB_KEY_RIGHT, right);
+    GB_set_key_state(&_gb, GB_KEY_UP, up);
+    GB_set_key_state(&_gb, GB_KEY_DOWN, down);
 }
 
 - (void)controller:(GCController *)controller motionChanged:(GCMotion *)motion
@@ -793,7 +817,8 @@ static void rumbleCallback(GB_gameboy_t *gb, double amp)
     _backgroundView.frame = [layout viewRectForOrientation:orientation];
     _backgroundView.layout = layout;
     if (!self.presentedViewController) {
-        _window.backgroundColor = layout.theme.backgroundGradientBottom;
+        _window.backgroundColor = _backgroundView.fullScreenMode? [UIColor blackColor] :
+                                                                  layout.theme.backgroundGradientBottom;
     }
 }
 
@@ -850,9 +875,9 @@ static void rumbleCallback(GB_gameboy_t *gb, double amp)
 - (UIStatusBarStyle)preferredStatusBarStyle
 {
     if (@available(iOS 13.0, *)) {
-        return _verticalLayout.theme.isDark? UIStatusBarStyleLightContent : UIStatusBarStyleDarkContent;
+        return (_verticalLayout.theme.isDark || _backgroundView.fullScreenMode)? UIStatusBarStyleLightContent : UIStatusBarStyleDarkContent;
     }
-    return _verticalLayout.theme.isDark? UIStatusBarStyleLightContent : UIStatusBarStyleDefault;
+    return (_verticalLayout.theme.isDark || _backgroundView.fullScreenMode)? UIStatusBarStyleLightContent : UIStatusBarStyleDefault;
 }
 
 

iOS/main.m

@@ -26,6 +26,7 @@ int main(int argc, char * argv[])
             @"GBDynamicSpeed": @NO,
             
             @"GBInterfaceTheme": @"SameBoy",
+            @"GBControllersHideInterface": @YES,
                         
             @"GBCurrentTheme": @"Lime (Game Boy)",
             // Default themes