Use hard-coded hotkey to invoke battery dialog dismisser

* Add DDHotKey library to the project. Just copy the files in from the
  latest HEAD@e0481f648e0bc7e55d183622b00510b6721152d8.
* Only add DDHotKeyCenter.{h,m} & DDHotKeyUtilities.{h,m} to the "Low
  Battery Yup.d" target as the *TextField file is only useful for a UI
  to choose a hotkey, and we don't have a UI in this target.
* Set the DDHotKey* files to use ARC when compiling since they require
  it. This was done by going to Build Phases -> Compile Sources and
  adding this flag for both files:

      -fobj-arc

  this I figured out thanks to the following SO post:

    http://stackoverflow.com/questions/6448874/disable-automatic-reference-counting-for-some-files/10255815#10255815

* Link Carbon.framework because DDHotKey depends on it to register
  global hotkeys
* Move our mouse moving & clicking code to a new method that gets used
  as the global hotkey action
* Fix a runtime error caused by MainMenu.xib not being available (as a
  result of f0e8b5188e6fb984511eb01849380669e69632a6). To do this, we
  modify `main.m` to bypass the check for MainMenu.xib as described in
  this SO post:

    http://stackoverflow.com/questions/6945872/cocoa-app-without-a-mainmenu-xib/6946016#6946016

* Delete the `window` `IBOutlet` since we no longer have a MainMenu.xib
  and don't have a window in this app.

3 files changed, 18 insertions, 2 deletions

diff --git a/Low Battery Yup d/AppDelegate.h b/Low Battery Yup d/AppDelegate.h
index ab9467b..10f6e4b 100644
--- a/Low Battery Yup d/AppDelegate.h
+++ b/Low Battery Yup d/AppDelegate.h
@@ -10,6 +10,6 @@
 
 @interface AppDelegate : NSObject <NSApplicationDelegate>
 
-@property (assign) IBOutlet NSWindow *window;
+- (void)dismissLowBatteryWarning:(NSEvent *)hotKeyEvent;
 
 @end
diff --git a/Low Battery Yup d/AppDelegate.m b/Low Battery Yup d/AppDelegate.m
index 0a7d2a3..51c1626 100644
--- a/Low Battery Yup d/AppDelegate.m
+++ b/Low Battery Yup d/AppDelegate.m
@@ -7,7 +7,9 @@
 //
 
 #import "AppDelegate.h"
+#import "DDHotKeyCenter.h"
 #import "Mouse.h"
+#import <Carbon/Carbon.h>
 
 @implementation AppDelegate
 
@@ -18,6 +20,16 @@
 
 - (void)applicationDidFinishLaunching:(NSNotification *)aNotification
 {
+	DDHotKeyCenter *hotkey_center = [DDHotKeyCenter sharedHotKeyCenter];
+	[hotkey_center registerHotKeyWithKeyCode:kVK_ANSI_0
+		modifierFlags:(NSCommandKeyMask | NSAlternateKeyMask | NSShiftKeyMask | NSControlKeyMask)
+		target:self
+		action:@selector(dismissLowBatteryWarning:)
+		object:nil];
+}
+
+- (void)dismissLowBatteryWarning:(NSEvent *)hotKeyEvent
+{
 	Mouse *m = [[Mouse alloc] init];
 	[m moveToLowBatteryOK];
 	[m click];
diff --git a/Low Battery Yup d/main.m b/Low Battery Yup d/main.m
index a58a570..dbd48d9 100644
--- a/Low Battery Yup d/main.m
+++ b/Low Battery Yup d/main.m
@@ -7,8 +7,12 @@
 //
 
 #import <Cocoa/Cocoa.h>
+#import "AppDelegate.h"
 
 int main(int argc, char *argv[])
 {
-	return NSApplicationMain(argc, (const char **)argv);
+	AppDelegate *delegate = [[AppDelegate alloc] init];
+	[[NSApplication sharedApplication] setDelegate:delegate];
+	[NSApp run];
+	return EXIT_SUCCESS;
 }