OSX Tray Icon in Go

osx_tray_icon.go

package main

// http://www.cocoawithlove.com/2010/09/minimalist-cocoa-programming.html
// https://github.com/TooTallNate/NodObjC/blob/master/examples/NodeCocoaHelloWorld.app/Contents/MacOS/app.js
// https://github.com/TooTallNate/NodObjC/issues/21
// http://www.gnustep.it/nicola/Tutorials/FirstGUIApplication/node3.html

/*
#cgo CFLAGS: -x objective-c
#cgo LDFLAGS: -framework Cocoa

#import <Cocoa/Cocoa.h>

void addTrayIconMenuItems();

@interface FooAppDelegate : NSObject <NSApplicationDelegate>

@property (strong, nonatomic) NSStatusItem *statusItem;

@end

@interface FooAppDelegate ()

@end


@implementation FooAppDelegate

- (void)applicationDidFinishLaunching:(NSNotification *)aNotification
{
	printf("%s", "applicationDidFinishLaunching() fired\n");
	addTrayIconMenuItems();
}

- (NSApplicationTerminateReply)applicationShouldTerminate:(NSApplication *)sender
{
	printf("%s", "I am terminating!\n");
	return NSTerminateNow;
}

- (void)openFeedbin:(id) sender
{
	printf("%s", "You pressed a thing!\n");
}

@end

NSStatusItem * _statusItem;

void createApplication() {
	[NSAutoreleasePool new];
	[NSApplication sharedApplication];
	// In Snow Leopard, programs without application bundles and Info.plist files
	// don't get a menubar and can't be brought to the front unless the
	// presentation option is changed
	[NSApp setActivationPolicy:NSApplicationActivationPolicyRegular];
}

void createTrayIcon() {
	_statusItem = [[NSStatusBar systemStatusBar] statusItemWithLength:NSVariableStatusItemLength];

	// The text that will be shown in the menu bar
	_statusItem.title = @"";

	// The image that will be shown in the menu bar, a 16x16 black png works best
	//_statusItem.image = [NSImage imageNamed:@"feedbin-logo"];
	_statusItem.image = [[NSImage alloc] initByReferencingFile:@"lightning-inactive.png"];

	// The highlighted image, use a white version of the normal image
	//_statusItem.alternateImage = [NSImage imageNamed:@"feedbin-logo-alt"];
	_statusItem.alternateImage = [[NSImage alloc] initByReferencingFile:@"lightning-active.png"];

	// The image gets a blue background when the item is selected
	_statusItem.highlightMode = YES;
}

void addTrayIconMenuItems() {
	NSMenu *menu = [[NSMenu alloc] init];
	[menu addItemWithTitle:@"Do a thing" action:@selector(openFeedbin:) keyEquivalent:@""];
	[menu addItem:[NSMenuItem separatorItem]]; // A thin grey line
	[menu addItemWithTitle:@"Quit" action:@selector(terminate:) keyEquivalent:@""];


// [menu addItemWithTitle:@"Refresh" action:@selector(getUnreadEntries:) keyEquivalent:@""];
// if ([[[KMFeedbinCredentialStorage sharedCredentialStorage] credential] hasPassword]) {
// 	[menu addItemWithTitle:@"Log Out" action:@selector(logOut:) keyEquivalent:@""];
// } else {
// 	[menu addItemWithTitle:@"Log In" action:@selector(logIn:) keyEquivalent:@""];
// }
// [menu addItem:[NSMenuItem separatorItem]]; // A thin grey line
// [menu addItemWithTitle:@"Quit Feedbin Notifier" action:@selector(terminate:) keyEquivalent:@""];
	_statusItem.menu = menu;
}

void windowLoop() {
	FooAppDelegate * p = [FooAppDelegate alloc];
	[NSApp setDelegate:p];
	[NSApp run];
}
*/
import "C"
import (
	"fmt"
	"time"
)

func main() {
	C.createApplication()
	C.createTrayIcon()
	go C.windowLoop()
	fmt.Println("Sleeping for 10 seconds to let the app loop run")
	time.Sleep(10 * time.Second)
}