EmulatorGLView posts an NSNotification rather than calls API method(s)

- Joystick connectivity polling is a consumer

Apple2Mac/Apple2Mac/Classes/OSX/EmulatorGLView.m

@@ -9,7 +9,6 @@
 // Based on sample code from https://developer.apple.com/library/mac/samplecode/GLEssentials/Introduction/Intro.html
 
 #import "EmulatorGLView.h"
-#import "EmulatorJoystickController.h"
 
 // Apple //e common routines
 #import "common.h"
@@ -23,9 +22,10 @@
 #define USE_DISPLAYLINK 1
 #endif
 
-
 #define SUPPORT_RETINA_RESOLUTION 1
 
+const NSString *kDrawTimerNotification = @"kDrawTimerNotification";
+
 @interface EmulatorGLView ()
 
 #if USE_DISPLAYLINK
@@ -280,7 +280,7 @@ static CVReturn displayLinkCallback(CVDisplayLinkRef displayLink, const CVTimeSt
     video_driver_render();
 	CGLFlushDrawable([[self openGLContext] CGLContextObj]);
     CGLUnlockContext([[self openGLContext] CGLContextObj]);
-    [[EmulatorJoystickController sharedInstance] connectivityPoll];
+    [[NSNotificationCenter defaultCenter] postNotificationName:(NSString *)kDrawTimerNotification object:nil];
 }
 
 - (void)dealloc

Apple2Mac/Apple2Mac/Classes/OSX/EmulatorJoystickController.h

@@ -10,8 +10,4 @@
 
 @interface EmulatorJoystickController : NSObject
 
-+ (EmulatorJoystickController *)sharedInstance;
-- (void)connectivityPoll;
-
-
 @end

Apple2Mac/Apple2Mac/Classes/OSX/EmulatorJoystickController.m

@@ -7,17 +7,19 @@
 //
 
 #import "EmulatorJoystickController.h"
-#import <DDHidLib/DDHidJoystick.h>
+#import "EmulatorWindowController.h"
 #import "common.h"
 
+#import <DDHidLib/DDHidJoystick.h>
+
 @interface EmulatorJoystickController()
 @property (nonatomic, retain) NSDictionary *allJoysticks;
++ (EmulatorJoystickController *)sharedInstance;
 - (void)resetJoysticks;
 @end
 
 void gldriver_joystick_reset(void) {
-    EmulatorJoystickController *joystickController = [EmulatorJoystickController sharedInstance];
-    [joystickController resetJoysticks];
+    [EmulatorJoystickController sharedInstance];
 }
 
 @implementation EmulatorJoystickController
@@ -39,13 +41,14 @@ void gldriver_joystick_reset(void) {
     self = [super init];
     if (self)
     {
-        // ...
+        [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(connectivityPoll:) name:(NSString *)kDrawTimerNotification object:nil];
     }
     return self;
 }
 
 - (void)dealloc
 {
+    [[NSNotificationCenter defaultCenter] removeObserver:self];
     self.allJoysticks = nil;
     [super dealloc];
 }
@@ -87,7 +90,7 @@ void gldriver_joystick_reset(void) {
 #pragma mark -
 #pragma mark Joystick connectivity polling
 
-- (void)connectivityPoll
+- (void)connectivityPoll:(NSNotification *)notification
 {
     NSArray *joysticks = [DDHidJoystick allJoysticks];
     BOOL changed = ([joysticks count] != [self.allJoysticks count]);

Apple2Mac/Apple2Mac/Classes/OSX/EmulatorWindowController.h

@@ -11,6 +11,8 @@
 #import <Cocoa/Cocoa.h>
 #import "EmulatorGLView.h"
 
+extern const NSString *kDrawTimerNotification;
+
 @interface EmulatorWindowController : NSWindowController
 
 @end