ui/cocoa: Use NSTrackingInVisibleRect

I observed [NSTrackingArea rect] becomes de-synchronized with the view
frame with some unknown condition, and fails to track mouse movement on
some area of the view. Specify NSTrackingInVisibleRect option to let
Cocoa automatically update NSTrackingArea, which also saves code for
synchronization.

Fixes: 91aa508d02 ("ui/cocoa: Let the platform toggle fullscreen")
Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-ID: <20240323-fixes-v2-3-18651a2b0394@daynix.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>

ui/cocoa.m

@@ -307,7 +307,6 @@ static void handleAnyDeviceErrors(Error * err)
 */
 @interface QemuCocoaView : NSView
 {
-    NSTrackingArea *trackingArea;
     QEMUScreen screen;
     pixman_image_t *pixman_image;
     BOOL isMouseGrabbed;
@@ -359,6 +358,19 @@ - (id)initWithFrame:(NSRect)frameRect
     self = [super initWithFrame:frameRect];
     if (self) {
 
+        NSTrackingAreaOptions options = NSTrackingActiveInKeyWindow |
+                                        NSTrackingMouseEnteredAndExited |
+                                        NSTrackingMouseMoved |
+                                        NSTrackingInVisibleRect;
+
+        NSTrackingArea *trackingArea =
+            [[NSTrackingArea alloc] initWithRect:CGRectZero
+                                         options:options
+                                           owner:self
+                                        userInfo:nil];
+
+        [self addTrackingArea:trackingArea];
+        [trackingArea release];
         screen.width = frameRect.size.width;
         screen.height = frameRect.size.height;
 #if MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_VERSION_14_0
@@ -389,41 +401,9 @@ - (BOOL) isOpaque
     return YES;
 }
 
-- (void) removeTrackingRect
-{
-    if (trackingArea) {
-        [self removeTrackingArea:trackingArea];
-        [trackingArea release];
-        trackingArea = nil;
-    }
-}
-
-- (void) frameUpdated
-{
-    [self removeTrackingRect];
-
-    if ([self window]) {
-        NSTrackingAreaOptions options = NSTrackingActiveInKeyWindow |
-                                        NSTrackingMouseEnteredAndExited |
-                                        NSTrackingMouseMoved;
-        trackingArea = [[NSTrackingArea alloc] initWithRect:[self frame]
-                                                    options:options
-                                                      owner:self
-                                                   userInfo:nil];
-        [self addTrackingArea:trackingArea];
-        [self updateUIInfo];
-    }
-}
-
 - (void) viewDidMoveToWindow
 {
     [self resizeWindow];
-    [self frameUpdated];
-}
-
-- (void) viewWillMoveToWindow:(NSWindow *)newWindow
-{
-    [self removeTrackingRect];
 }
 
 - (void) selectConsoleLocked:(unsigned int)index
@@ -1314,7 +1294,7 @@ - (void)windowDidExitFullScreen:(NSNotification *)notification
 - (void)windowDidResize:(NSNotification *)notification
 {
     [cocoaView updateBounds];
-    [cocoaView frameUpdated];
+    [cocoaView updateUIInfo];
 }
 
 /* Called when the user clicks on a window's close button */