NSButton NSTrackingArea - tracking doesn't work - objective-c

Question

I'm trying to complete button highlighted on mouse over event. So I subclassed NSButton, where is put NSTrackingArea and methods - (void)mouseEntered:(NSEvent *)event and
- (void)updateTrackingAreas.
Creation of the button looks so (it's in loop so I use array to collect):
CalendarTile *button = [[CalendarTile alloc] init];
[button setFrame:CGRectMake(point_x, point_y, button_frame_width, button_frame_height)];
[button setBordered:NO];
[button setBezelStyle:NSRegularSquareBezelStyle];
[button setButtonType:NSMomentaryChangeButton];
[button setFont:[NSFont fontWithName:#"Avenir Next" size:40]];
[button setAlignment:NSCenterTextAlignment];
[button setTitle:[NSString stringWithFormat:#"%i", i]];
[button setTextColor:[NSColor colorWithCalibratedRed:(float)62/255 green:(float)62/255 blue:(float)62/255 alpha:1.0]];
[arrayWithButtons addObject:button];
...
for (CalendarTile *btn in arrayWithButton) {
[self addSubview:btn];
}
And this is a subclass - CalendarTile.m:
#implementation CalendarTile
- (void)updateTrackingAreas
{
[super updateTrackingAreas];
if (trackingArea)
{
[self removeTrackingArea:trackingArea];
}
NSTrackingAreaOptions options = NSTrackingInVisibleRect | NSTrackingMouseEnteredAndExited | NSTrackingActiveInKeyWindow;
trackingArea = [[NSTrackingArea alloc] initWithRect:NSZeroRect options:options owner:self userInfo:nil];
[self addTrackingArea:trackingArea];
}
- (void)mouseEntered:(NSEvent *)event
{
[self setImage:[NSImage imageNamed:#"highlight.png"]];
NSLog(#"HIGHLIGHT");
}
It should say in logs "HIGHLIGHT" when I have mouse over - it sadly doesn't.
Could you help me? What do I wrong?

Answer 1

Here is i have created and worked for me perfectly...
Step 1: Create the Button with tracking area
NSButton *myButton = [[NSButton alloc] initWithFrame:NSMakeRect(100, 7, 100, 50)];
[myButton setTitle:#"sample"];
[self.window.contentView addSubview:myButton];
// Insert code here to initialize your application
NSTrackingArea* trackingArea = [[NSTrackingArea alloc]
initWithRect:[myButton bounds]
options:NSTrackingMouseEnteredAndExited | NSTrackingActiveAlways
owner:self userInfo:nil];
[myButton addTrackingArea:trackingArea];
Step: 2 Implement the following methods
- (void)mouseEntered:(NSEvent *)theEvent{
NSLog(#"entered");
[[myButton cell] setBackgroundColor:[NSColor blueColor]];
}
- (void)mouseExited:(NSEvent *)theEvent{
[[myButton cell] setBackgroundColor:[NSColor redColor]];
NSLog(#"exited");
}

Answer 2

Try
trackingArea = [[NSTrackingArea alloc] initWithRect:NSZeroRect options:options owner:self userInfo:nil];
instead of
NSTrackingAreaOptions options = NSTrackingMouseEnteredAndExited | NSTrackingActiveAlways;
trackingArea = [[NSTrackingArea alloc] initWithRect:self.frame options:options owner:self userInfo:nil];