Based on the inspiration provided by MrDaniel, I decided to program a simple little counter.
The source code for this, minus the UI defined as xib; uses Foundation and AppKit frameworks (full sources and Xcode project on GitHub):
DBAppDelegate.h
// // DBAppDelegate.h // CocoaActivityCounter // // Created by Daniel Beck on 29.07.2012. // Copyright (c) 2012 Daniel Beck. All rights reserved. // #import <Cocoa/Cocoa.h> static id monitorLeftMouseDown; static id monitorRightMouseDown; static id monitorKeyDown; @interface DBAppDelegate : NSObject <NSApplicationDelegate> @property (assign) IBOutlet NSWindow *window; @property (strong) IBOutlet NSTextView *logView; @property (weak) IBOutlet NSToolbarItem *toolbarStartButton; @property (weak) IBOutlet NSToolbarItem *toolbarStopButton; @property (weak) IBOutlet NSToolbarItem *toolbarClearButton; @property (weak) IBOutlet NSTextField *keyPressCounterLabel; @property (weak) IBOutlet NSTextField *leftMouseCounterLabel; @property (weak) IBOutlet NSTextField *rightMouseCounterLabel; @property (readwrite) NSDateFormatter *logDateFormatter; @property (readwrite) NSNumber *keyPressCounter; @property (readwrite) NSNumber *leftMouseCounter; @property (readwrite) NSNumber *rightMouseCounter; @property (readwrite) BOOL loggingEnabled; - (IBAction)stopButtonPressed:(id)sender; - (IBAction)startButtonPressed:(id)sender; - (IBAction)clearButtonPressed:(id)sender; - (void)logMessageToLogView:(NSString*)message; - (BOOL)validateToolbarItem:(NSToolbarItem *)theItem; @end DBAppDelegate.m
// // DBAppDelegate.m // CocoaActivityCounter // // Created by Daniel Beck on 29.07.2012. // Copyright (c) 2012 Daniel Beck. All rights reserved. // #import "DBAppDelegate.h" #import <AppKit/NSEvent.h> @implementation DBAppDelegate @synthesize logView; @synthesize toolbarStartButton; @synthesize toolbarStopButton; @synthesize keyPressCounterLabel; @synthesize leftMouseCounterLabel; @synthesize rightMouseCounterLabel; @synthesize toolbarClearButton; @synthesize loggingEnabled; @synthesize keyPressCounter; @synthesize leftMouseCounter; @synthesize rightMouseCounter; - (void)applicationDidFinishLaunching:(NSNotification *)aNotification { self.loggingEnabled = NO; self.logDateFormatter = [[NSDateFormatter alloc] init]; [self.logDateFormatter setTimeStyle:NSDateFormatterMediumStyle]; self.keyPressCounter = [NSNumber numberWithInt:0]; self.leftMouseCounter = [NSNumber numberWithInt:0]; self.rightMouseCounter = [NSNumber numberWithInt:0]; } - (BOOL)applicationShouldTerminateAfterLastWindowClosed:(NSApplication *)theApplication { return YES; } -(void)logMessageToLogView:(NSString*)message { [logView setString: [[logView string] stringByAppendingFormat:@"%@: %@\n", [self.logDateFormatter stringFromDate:[NSDate date]], message]]; } - (IBAction)stopButtonPressed:(id)sender { if (!self.loggingEnabled) { return; } self.loggingEnabled = false; [NSEvent removeMonitor:monitorLeftMouseDown]; [NSEvent removeMonitor:monitorRightMouseDown]; [NSEvent removeMonitor:monitorKeyDown]; } - (IBAction)startButtonPressed:(id)sender { if (self.loggingEnabled) { return; } self.loggingEnabled = true; monitorLeftMouseDown = [NSEvent addGlobalMonitorForEventsMatchingMask:NSLeftMouseDownMask handler:^(NSEvent *evt) { [self logMessageToLogView:[NSString stringWithFormat:@"Left mouse down!"]]; self.leftMouseCounter = [NSNumber numberWithInt:(1 + [self.leftMouseCounter intValue])]; }]; monitorRightMouseDown = [NSEvent addGlobalMonitorForEventsMatchingMask:NSRightMouseDownMask handler:^(NSEvent *evt) { [self logMessageToLogView:@"Right mouse down!"]; self.rightMouseCounter = [NSNumber numberWithInt:(1 + [self.rightMouseCounter intValue])]; }]; monitorKeyDown = [NSEvent addGlobalMonitorForEventsMatchingMask:NSKeyDownMask handler:^(NSEvent *evt) { [self logMessageToLogView:[NSString stringWithFormat:@"Key down: %@ (key code %d)", [evt characters], [evt keyCode]]]; self.keyPressCounter = [NSNumber numberWithInt:(1 + [self.keyPressCounter intValue])]; }]; } - (IBAction)clearButtonPressed:(id)sender { self.keyPressCounter = [NSNumber numberWithInt:0]; self.leftMouseCounter = [NSNumber numberWithInt:0]; self.rightMouseCounter = [NSNumber numberWithInt:0]; [self.logView setString:@""]; } - (BOOL)validateToolbarItem:(NSToolbarItem *)theItem { if ([theItem isEqualTo:toolbarStartButton]) { return !self.loggingEnabled; } if ([theItem isEqualTo:toolbarStopButton]) { return self.loggingEnabled; } if ([theItem isEqualTo:toolbarClearButton]) { return !self.loggingEnabled; } return YES; } @end Icons used in the toolbar are from Tango Desktop Project.
