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Click buttons and not raising the window

The iTunes mini-player (to give just one example) supports switching between clicks when the application is not brought to the fore when using the play / pause and volume controls.

How it's done?

I was looking through Apple documentation and continuing a bit, Cocoa Event Handling Guide, dispatching an event, he claims:

Some events, many of which are defined by a set of applications (type NSAppKitDefined), are associated with actions controlled by the window or the application object itself. Examples of these events are those associated with activating, deactivating, hiding and showing the application. NSApp filters these events early on in its dispatching process and processes them independently.

So, from my limited understanding ( How an event enters Cocoa, the app ), subclassic NSApplication and overriding - (void)sendEvent:(NSEvent *)theEventshould catch every mouse and keyboard event, but still the window gets bigger when clicked. Thus, either the window appears before the event is seen in NSApplication, or I missed something else.

I looked at Matt Gallagher Demystifying NSApplication, recreating it , unfortunately, Matt did not close the queue of events, so other than that, I'm at a standstill.

Any help would be appreciated, thanks.

Edited to add: Found a message in the Lloyd Lounge in which he talks about the same problem and links to the message in CocoaBuilder, first remove the right mouse button . I'm currently trying to execute the code provided there, after some messing around and activating NSLog for [theEvent type], the activity of the left mouse button is activated.

, , , , 13, 1, 13, NSAppKitDefined, NSLeftMouseDown NSAppKitDefined . , ?

+5
4

, , . NSView , .

- (void)mouseDown:(NSEvent *)theEvent {
    [NSApp preventWindowOrdering];
//  [self setNeedsDisplay:YES];
}

- (BOOL)acceptsFirstMouse:(NSEvent *)theEvent {
    return YES;
}

- (BOOL)shouldDelayWindowOrderingForEvent:(NSEvent *)theEvent {
    return YES;
}

, . , NSButton, , , , .

+2

NSPanel, , . , , , YES -acceptsFirstMouse:; NSButton .

IB , -setBecomesKeyOnlyIfNeeded:YES , , .

+3

NSButton , :

(ClickThroughButton.h):

#import <AppKit/AppKit.h>

@interface ClickThroughButton : NSButton

@end

(ClickThroughButton.m):

#import "ClickThroughButton.h"

@implementation ClickThroughButton

- (BOOL)shouldDelayWindowOrderingForEvent:(NSEvent *)theEvent {
    return ![NSApp isActive];    
}

- (void)mouseDown:(NSEvent *)theEvent {    
    if (![NSApp isActive]) {
        [NSApp preventWindowOrdering];        

        [self highlight:YES];

        NSEvent *mouseUpEvent = [[self window] nextEventMatchingMask:NSLeftMouseUpMask
                                                  untilDate:[NSDate distantFuture]
                                                     inMode:NSEventTrackingRunLoopMode
                                                    dequeue:YES];
        NSPoint mouseLocation = [self convertPoint:[mouseUpEvent locationInWindow] fromView:nil];
        BOOL mouseUpInside = [self mouse:mouseLocation inRect:[self bounds]];

        if (mouseUpInside) {
            if ([self target])
                [[self target] performSelector:[self action] withObject:self]; 
        }

        [self highlight:NO];            

    } else {
        [super mouseDown:theEvent];        
    }
}

@end
+2

acceptsFirstMouse:? NSView YES , , , . , , , .

, , , acceptsFirstMouse:.

+1

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