c++ - 如何使用c++在MAC OS中捕获鼠标事件

Question

我想在 Mac 操作系统中捕获鼠标右键和左键单击并使用以下代码:

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CGEventRef event = CGEventCreate(NULL);
CGEventType eventType = CGEventGetType(event);

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cout << "mouse event type is : " << eventType << endl;

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我使用此代码查看事件类型，例如必须是 kCGEventLeftMouseDown 或显示事件类型的整数值，但此代码不捕获鼠标事件并返回 0

Answer 1

这应该如何做任何事 :D 您需要捕获现有事件……您只需调用一个助手并创建一个新事件……但它非常简单。

查看CGEventTap，它可以满足您的需求。

鉴于操作系统已启用辅助功能，事件点击在整个系统范围内工作!

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一些代码:

//called for each event
static CGEventRef myCGEventCallback(CGEventTapProxy proxy, 
                                        CGEventType t,
                                        CGEventRef event,
                                        void *refcon);

- (void)threaded_listenForDrags {
    if (!_eventTap)
    {
        int eventMask = CGEventMaskBit(kCGEventLeftMouseDown)
        | CGEventMaskBit(kCGEventLeftMouseUp) 
        | CGEventMaskBit(kCGEventLeftMouseDragged)
        | CGEventMaskBit(kCGEventRightMouseDragged)
        | CGEventMaskBit(kCGEventOtherMouseDragged);

        _eventTap = CGEventTapCreate(kCGHIDEventTap,
                                    kCGHeadInsertEventTap,
                                    kCGEventTapOptionListenOnly, 
                                    eventMask, 
                                    myCGEventCallback,
                                    (__bridge void*)self);
        if (!_eventTap)
        {
            DDLogError(@"%@ no tap; universal access?", NSStringFromSelector(_cmd));
            return;
        }
        CFRunLoopSourceRef runLoopSource = CFMachPortCreateRunLoopSource(NULL,
                                                                         _eventTap, 0);
        CFRunLoopAddSource(CFRunLoopGetCurrent(), runLoopSource, 
                           kCFRunLoopCommonModes);

        CFRelease(runLoopSource);       
    }
    CGEventTapEnable(_eventTap, true);

    CFRunLoopRun();
}

- (void)threaded_endListenForDrags {
    CFMachPortRef et = _eventTap;

    CGEventTapEnable(_eventTap, false);
    _eventTap = nil;

    dispatch_sync(dispatch_get_main_queue(), ^{
        if(_enabled) {
            _enabled = NO;
            [self setEnabled:YES];
        }
    }); 

    CFRunLoopStop(CFRunLoopGetCurrent());
    CFRelease(et);
}