macos 如何在 Mac OS X 下捕获/发布系统范围的键盘/鼠标事件？
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How to Capture / Post system-wide Keyboard / Mouse events under Mac OS X?
提问by Andrew Grant
For a scripting utility I need to be able to record a series of keyboard and mouse events that occur when an application has focus. The second part is being able to later send those events to the active window.
对于脚本实用程序，我需要能够记录在应用程序获得焦点时发生的一系列键盘和鼠标事件。第二部分是能够稍后将这些事件发送到活动窗口。
I do not need to worry about menus or tracking the identifier of which window receives input.
我不需要担心菜单或跟踪哪个窗口接收输入的标识符。
I know how to do this under Windows but have no idea about Mac OS X.
我知道如何在 Windows 下执行此操作，但对 Mac OS X 一无所知。
回答by Lounges
The first thing i will tell you is that you CAN'Tdo this without the user enabling support for assitive devices in the accessability control panel. It's some kind of security built into OSX.
的第一件事，我会告诉你的是，你CAN NOT未经用户允许在前往的交通控制面板assitive设备的支持，做到这一点。这是 OSX 中内置的某种安全性。
Here is a code snippit I am using in one of my applications to do this:
这是我在其中一个应用程序中使用的代码片段：
//this method calls a carbon method to attach a global event handler
- (void)attachEventHandlers
{
//create our event type spec for the keyup
EventTypeSpec eventType;
eventType.eventClass = kEventClassKeyboard;
eventType.eventKind = kEventRawKeyUp;
//create a callback for our event to fire in
EventHandlerUPP handlerFunction = NewEventHandlerUPP(globalKeyPress);
//install the event handler
OSStatus err = InstallEventHandler(GetEventMonitorTarget(), handlerFunction, 1, &eventType, self, NULL);
//error checking
if( err )
{
//TODO: need an alert sheet here
NSLog(@"Error registering keyboard handler...%d", err);
}
//create our event type spec for the mouse events
EventTypeSpec eventTypeM;
eventTypeM.eventClass = kEventClassMouse;
eventTypeM.eventKind = kEventMouseUp;
//create a callback for our event to fire in
EventHandlerUPP handlerFunctionM = NewEventHandlerUPP(globalMousePress);
//install the event handler
OSStatus errM = InstallEventHandler(GetEventMonitorTarget(), handlerFunctionM, 1, &eventTypeM, self, NULL);
//error checking
if( errM )
{
//TODO: need an alert sheet here
NSLog(@"Error registering mouse handler...%d", err);
}
}
Here is an example of the callback method i am using:
这是我正在使用的回调方法的示例：
OSStatus globalKeyPress(EventHandlerCallRef nextHandler, EventRef theEvent, void *userData)
{
NSEvent *anEvent = [NSEvent eventWithEventRef:theEvent];
NSEventType type = [anEvent type];
WarStrokerApplication *application = (WarStrokerApplication*)userData;
//is it a key up event?
if( type == NSKeyUp)
{
//which key is it?
switch( [anEvent keyCode] )
{
case NUMERIC_KEYPAD_PLUS:
//this is the character we are using for our toggle
//call the handler function
[application toggleKeyPressed];
break;
//Comment this line back in to figure out the keykode for a particular character
default:
NSLog(@"Keypressed: %d, **%@**", [anEvent keyCode], [anEvent characters]);
break;
}
}
return CallNextEventHandler(nextHandler, theEvent);
}
回答by Ben
For the latter part, posting events, use the CGEvent methods provided in ApplicationServices/ApplicationServices.h
对于后一部分，发布事件，使用 ApplicationServices/ApplicationServices.h 中提供的 CGEvent 方法
Here's an example function to move the mouse to a specified absolute location:
这是将鼠标移动到指定绝对位置的示例函数：
#include <ApplicationServices/ApplicationServices.h>
int to(int x, int y)
{
CGPoint newloc;
CGEventRef eventRef;
newloc.x = x;
newloc.y = y;
eventRef = CGEventCreateMouseEvent(NULL, kCGEventMouseMoved, newloc,
kCGMouseButtonCenter);
//Apparently, a bug in xcode requires this next line
CGEventSetType(eventRef, kCGEventMouseMoved);
CGEventPost(kCGSessionEventTap, eventRef);
CFRelease(eventRef);
return 0;
}
回答by diciu
For tapping mouse events, see http://osxbook.com/book/bonus/chapter2/altermouse/
对于点击鼠标事件，请参阅http://osxbook.com/book/bonus/chapter2/altermouse/
I haven't checked this under 10.5 Leopard but on 10.4 it works.
我没有在 10.5 Leopard 下检查过这个，但在 10.4 上它可以工作。
