鼠标跟踪守护进程

Question

我需要用Cocoa编写一些东西来表面原始鼠标移动数据。最理想的情况是，应用程序只是一个可以运行的小守护程序，将数据传递给另一个应用程序可以使用的套接字服务器来访问事件。

任何人都可以在方向和工具方面指出正确的方向吗？我甚至不知道现在该从哪里开始。

Answer 1

其他简单的方式做，这是add a global event monitor（10.6只，不过）：

id eventHandler = [NSEvent addGlobalMonitorForEventsMatchingMask:NSMouseMovedMask handler:^(NSEvent * mouseEvent) { 
    NSLog(@"Mouse moved: %@", NSStringFromPoint([mouseEvent locationInWindow])); 
}]; 

然后，当你做跟踪，你这样做：

[NSEvent removeMonitor:eventHandler]; 

Answer 2

写一个EventTap。文档可以是found here。

在MacOS X的每一个事件（例如每键盘按键按下，每一个鼠标键按下或鼠标移动）创建了移动以下路径的事件：在这里我写了一个箭头

Driver (Kernel) -> Window Server (privileged) -> User (Login) Session -> Active Application 

无处不在（->）的可以将EventTap放置到只查看事件（仅侦听EventTap）或修改或删除事件（事件筛选EventTap）。请注意，要捕获Driver和WindowServer之间的事件，您的守护程序必须以root权限运行。

下面是一些示例代码：

// Compile with: 
// gcc -framework ApplicationServices -o MouseWatcher MouseWatcher.c 
// 
// Start with: 
// ./MouseWatcher 
// 
// Terminate by hitting CTRL+C 

#include <ApplicationServices/ApplicationServices.h> 


static CGEventRef myEventTapCallback (
    CGEventTapProxy proxy, 
    CGEventType type, 
    CGEventRef event, 
    void * refcon 
) { 
    CGPoint mouseLocation; 

    // If we would get different kind of events, we can distinguish them 
    // by the variable "type", but we know we only get mouse moved events 

    mouseLocation = CGEventGetLocation(event); 
    printf(
     "Mouse is at x/y: %ld/%ld\n", 
     (long)mouseLocation.x, 
     (long)mouseLocation.y 
    ); 
    // Pass on the event, we must not modify it anyway, we are a listener 
    return event; 
} 


int main (
    int argc, 
    char ** argv 
) { 
    CGEventMask emask; 
    CFMachPortRef myEventTap; 
    CFRunLoopSourceRef eventTapRLSrc; 

    // We only want one kind of event at the moment: The mouse has moved 
    emask = CGEventMaskBit(kCGEventMouseMoved); 

    // Create the Tap 
    myEventTap = CGEventTapCreate (
     kCGSessionEventTap, // Catch all events for current user session 
     kCGTailAppendEventTap, // Append to end of EventTap list 
     kCGEventTapOptionListenOnly, // We only listen, we don't modify 
     emask, 
     &myEventTapCallback, 
     NULL // We need no extra data in the callback 
    ); 

    // Create a RunLoop Source for it 
    eventTapRLSrc = CFMachPortCreateRunLoopSource(
     kCFAllocatorDefault, 
     myEventTap, 
     0 
    ); 

    // Add the source to the current RunLoop 
    CFRunLoopAddSource(
     CFRunLoopGetCurrent(), 
     eventTapRLSrc, 
     kCFRunLoopDefaultMode 
    ); 

    // Keep the RunLoop running forever 
    CFRunLoopRun(); 

    // Not reached (RunLoop above never stops running) 
    return 0; 
} 

来自Dave答案是这样做几乎同样的事情的更好的方式可可;基本上Cocoa和我在后面的示例中做的一样，只是包装成静态方法。 Dave的代码只能在10.6上运行，不过，上面的代码在10.4,10.5和10.6中运行。