Question

Is there an open-source library for Cocoa to create a window following iTunes’ style? That is the window controls are laid out vertically instead of horizontally:

I find it space-saving and good for utility-type applications that doesn’t need a window title.

Answer 1

This quickly hacked away NSWindow delegate should get you started:

//VerticalTrafficLightsWindowDelegate.h

#import <Cocoa/Cocoa.h>

@interface VerticalTrafficLightsWindowDelegate : NSObject <NSWindowDelegate> {
    NSWindow *window;
}

@property (assign) IBOutlet NSWindow *window;

- (void)verticalizeButtonsForWindow:(NSWindow *)aWindow;

@end

//VerticalTrafficLightsWindowDelegate.m

#import "VerticalTrafficLightsWindowDelegate.h"

@implementation VerticalTrafficLightsWindowDelegate

@synthesize window;

- (void)awakeFromNib {
    [self verticalizeButtonsForWindow:window];
}

- (void)windowDidResize:(NSNotification *)notification {
    [self verticalizeButtonsForWindow:window];
}

- (void)verticalizeButtonsForWindow:(NSWindow *)aWindow {
    NSArray *contentSuperViews = [[[aWindow contentView] superview] subviews];

    NSView *closeButton = [contentSuperViews objectAtIndex:0];
    NSRect closeButtonFrame = [closeButton frame];

    NSView *minimizeButton = [contentSuperViews objectAtIndex:2];
    NSRect minimizeButtonFrame = [minimizeButton frame];

    NSView *zoomButton = [contentSuperViews objectAtIndex:1];
    NSRect zoomButtonFrame = [zoomButton frame];

    [minimizeButton setFrame:NSMakeRect(closeButtonFrame.origin.x, closeButtonFrame.origin.y - 20.0, minimizeButtonFrame.size.width, minimizeButtonFrame.size.height)];
    [zoomButton setFrame:NSMakeRect(closeButtonFrame.origin.x, closeButtonFrame.origin.y - 40.0, zoomButtonFrame.size.width, zoomButtonFrame.size.height)];
}

@end

However I got to say that just like JeremyP I can only hope Apple’s not going to spread this any wider in OS X.