Fixed menu shortcut not working in fullscreen (close #537)

src/SFML/Window/OSX/SFWindow.h

@@ -65,6 +65,26 @@
 ////////////////////////////////////////////////////////////
 -(void)keyDown:(NSEvent*)theEvent;
 
+////////////////////////////////////////////////////////////
+/// \brief This action method simulates the user clicking the close button
+///
+/// Override NSWindow implementation, see implementation for details
+///
+/// \param sender The message’s sender
+///
+////////////////////////////////////////////////////////////
+-(void)performClose:(id)sender;
+
+////////////////////////////////////////////////////////////
+/// \brief Enabling or disabling a specific menu item
+///
+/// \param menuItem An NSMenuItem object that represents the menu item
+///
+/// \return YES to enable menuItem, NO to disable it.
+///
+////////////////////////////////////////////////////////////
+-(BOOL)validateMenuItem:(NSMenuItem*)menuItem;
+
 @end
 
 

src/SFML/Window/OSX/SFWindow.m

@@ -59,6 +59,44 @@
 }
 
 
+////////////////////////////////////////////////////////
+-(void)performClose:(id)sender
+{
+    // From Apple documentation:
+    //
+    // > If the window’s delegate or the window itself implements windowShouldClose:,
+    // > that message is sent with the window as the argument. (Only one such message is sent;
+    // > if both the delegate and the NSWindow object implement the method, only the delegate
+    // > receives the message.) If the windowShouldClose: method returns NO, the window isn’t
+    // > closed. If it returns YES, or if it isn’t implemented, performClose: invokes the
+    // > close method to close the window.
+    // >
+    // > If the window doesn’t have a close button or can’t be closed (for example, if the
+    // > delegate replies NO to a windowShouldClose: message), the system emits the alert sound.
+    //
+    // The last paragraph is problematic for SFML fullscreen window since they don't have
+    // a close button (style is NSBorderlessWindowMask). So we reimplement this function.
+
+    BOOL shouldClose = NO;
+
+    if ([self delegate] && [[self delegate] respondsToSelector:@selector(windowShouldClose:)])
+        shouldClose = [[self delegate] windowShouldClose:sender];
+    // else if ([self respondsToSelector:@selector(windowShouldClose:)])
+    //     shouldClose = [self windowShouldClose:sender];
+    // error: no visible @interface for 'SFWindow' declares the selector 'windowShouldClose:'
+
+    if (shouldClose)
+        [self close];
+}
+
+
+////////////////////////////////////////////////////////
+-(BOOL)validateMenuItem:(NSMenuItem*)menuItem
+{
+    return [menuItem action] == @selector(performClose:);
+}
+
+
 @end