Register a global hotkey

Build DDHotKey as a static library so we can compile it with ARC turned
on and our project with ARC turned off. Since DDHotKey is written with
ARC, if I include its headers directly, I'd need to enable ARC on my
project in order to compile it.

Initialise an `NSApplication` to give us an environment in which to
register the global hotkey.

A new class `Invert` will respond to the hotkey and respond accordingly.

1 files changed, 28 insertions, 2 deletions

diff --git a/main.m b/main.m
index 9ea3d37..8ffc3b2 100644
--- a/main.m
+++ b/main.m
@@ -1,8 +1,28 @@
+#import <Carbon/Carbon.h>
 #import <CoreGraphics/CoreGraphics.h>
 
+#import "Invert.h"
+#import "DDHotKeyCenter.h"
+
 #define MAX_DISPLAYS 8
 
 int main(int argc, const char * argv[]) {
+    [NSApplication sharedApplication];
+
+    Invert *invert = [[Invert alloc] init];
+
+    DDHotKeyCenter *c = [DDHotKeyCenter sharedHotKeyCenter];
+    if (
+        ![c registerHotKeyWithKeyCode:kVK_ANSI_8
+            modifierFlags:
+                (NSEventModifierFlagControl | NSEventModifierFlagOption | NSEventModifierFlagCommand)
+            target:invert
+            action:@selector(toggleInvertColors:)
+            object:nil]
+    ) {
+        NSLog(@"Error registering hotkey");
+    }
+
     const CGGammaValue inverted_gamma[2] = {1, 0};
 
     CGDirectDisplayID active_displays[MAX_DISPLAYS];
@@ -30,9 +50,15 @@ int main(int argc, const char * argv[]) {
         }
     }
 
-    sleep(4);
+    // for (;;) {}
+    // sleep(4);
+    //
+    // CGDisplayRestoreColorSyncSettings();
+
+    // TODO: trap?
+    // [invert release];
 
-    CGDisplayRestoreColorSyncSettings();
+    [NSApp run];
 
     return 0;
 }