performClose: on a borderless window?

Is there a way开发者_运维知识库 to have the method performClose: working when i use NSBorderlessWindowMask? What method do i have to override ? (if its possible)

i have overridden some methods, and it works. All I want to know now is if i didn't take it from the bad approach :)

- (BOOL)validateMenuItem:(NSMenuItem *)menuItem
{
    return ([menuItem action] == @selector(performClose:) || [menuItem action] == @selector(performZoom:) || [menuItem action] == @selector(performMiniaturize:)) ? YES : [super validateMenuItem:menuItem];
}

- (BOOL)windowShouldClose:(id)sender
{
    return YES;
}

- (void)performClose:(id)sender
{
    if([[self delegate] respondsToSelector:@selector(windowShouldClose:)])
    {
        if(![[self delegate] windowShouldClose:self]) return;
    }
    else if([self respondsToSelector:@selector(windowShouldClose:)])
    {
        if(![self windowShouldClose:self]) return;
    }

    [self close];
}

- (void)performMiniaturize:(id)sender
{
    [self miniaturize:self];
}

- (void)performZoom:(id)sender
{
    [self zoom:self];
}

Since a borderless window doesn't have a close button, performClose: will not work. You should instead use the close method. However, this method also does not call windowShouldClose: on the window's delegate and cannot be hooked to an IBAction. If you want these features, you could create a wrapper method to handle closing for you.

@interface NSWindow (BorderlessClosing)
- (IBAction)performBorderlessClose:(id)sender;
@end

@implementation NSWindow (BorderlessClosing)
- (IBAction)performBorderlessClose:(id)sender {
    if([[self delegate] respondsToSelector:@selector(windowShouldClose:)]) {
        if(![[self delegate] windowShouldClose:self]) return;
    } else if([self respondsToSelector:@selector(windowShouldClose:)]) {
        if(![self windowShouldClose:self]) return;
    }
    [self close];
}
@end

As Kyle said, override your window and and add

-(BOOL)canBecomeKeyWindow
{
    return YES;
}

And in your WindowController,

 - (IBAction)performClose:(id)sender

should be called when using Close MenuItem.