将fn重新映射到OSX上的鼠标左键 [英] Remap `fn` to left mouse button on OSX

问题描述

整天单击鼠标会导致严重的肌腱炎.

I get bad tendinitis from clicking the mouse all day.

过去，我使用Karabiner重新映射fn键以模拟鼠标左键.但是，它不适用于Sierra.

In the past I used Karabiner to remap the fn key to simulate a left mouse button. However it doesn't work with Sierra.

我试图在Cocoa中完成此操作，当我按下并释放fn时，它可以正确地执行鼠标向下/向上操作.

I tried to accomplish this in Cocoa, and it correctly performs mouse-down/up when I press and release fn.

但是它不能处理双击/三次单击.

However it doesn't handle double-click / triple-click.

另外，在拖动(例如，拖动窗口或选择某些文本)时，在我键入命令之前，视觉上不会发生任何事情，从而完成了操作.

Also when dragging, (e.g. dragging a window, or selecting some text) nothing happens visually until I key-up, whereupon it completes.

如何修改我的代码以实现此目的?

How can I adapt my code to implement this?

首先，我创建一个事件水龙头:

First I create an event tap:

- (BOOL)tapEvents
{
    _modifiers = [NSEvent modifierFlags];

    if ( ! _eventTap ) {
        NSLog( @"Initializing an event tap." );

        // kCGHeadInsertEventTap -- new event tap should be inserted before
        //   any pre-existing event taps at the same location,
        _eventTap = CGEventTapCreate( kCGHIDEventTap, // kCGSessionEventTap,
                                      kCGHeadInsertEventTap,
                                      kCGEventTapOptionDefault,
                                           CGEventMaskBit( kCGEventKeyDown )
                                         | CGEventMaskBit( kCGEventFlagsChanged )
                                         | CGEventMaskBit( NSSystemDefined )
                                         ,
                                      (CGEventTapCallBack)_tapCallback,
                                      (__bridge void *)(self));
        if ( ! _eventTap ) {
            NSLog(@"unable to create event tap. must run as root or "
                    "add privlidges for assistive devices to this app.");
            return NO;
        }
    }
    CGEventTapEnable( _eventTap, YES );

    return [self isTapActive];
}

现在我实现回调:

CGEventRef _tapCallback(
                        CGEventTapProxy proxy,
                        CGEventType     type,
                        CGEventRef      event,
                        Intercept*     listener
                        )
{
    //Do not make the NSEvent here.
    //NSEvent will throw an exception if we try to make an event from the tap timout type
    @autoreleasepool {
        if( type == kCGEventTapDisabledByTimeout ) {
            NSLog(@"event tap has timed out, re-enabling tap");
            [listener tapEvents];
            return nil;
        }
        if( type != kCGEventTapDisabledByUserInput ) {
            return [listener processEvent:event];
        }
    }
    return event;
}

最后，我实现了一个processEvent，它将通过fn键上/下键之外的任何事件进行传递，该事件将转换为鼠标左上/下键:

Finally I implement a processEvent that will pass through any event apart from fn key up/down, which will get converted to left mouse up/down:

- (CGEventRef)processEvent:(CGEventRef)cgEvent
{
    //NSLog( @"- - - - - - -" );

    NSEvent* event = [NSEvent eventWithCGEvent:cgEvent];

    //NSLog(@"%d,%d", event.data1, event.data2);
    //NSEventType type = [event type];

    NSUInteger m = event.modifierFlags &
        ( NSCommandKeyMask | NSAlternateKeyMask | NSShiftKeyMask | NSControlKeyMask | NSAlphaShiftKeyMask | NSFunctionKeyMask );

    NSUInteger flags_changed = _modifiers ^ m;
    _modifiers = m;

    switch( event.type ) {
        case NSFlagsChanged:
        {
            assert(flags_changed);

            //NSLog(@"NSFlagsChanged: %d, event.modifierFlags: %lx", event.keyCode, event.modifierFlags);
            if( flags_changed & NSFunctionKeyMask ) {
                bool isDown = _modifiers & NSFunctionKeyMask;
                CGEventType evType = isDown ? kCGEventLeftMouseDown : kCGEventLeftMouseUp;
                CGPoint pt = [NSEvent mouseLocation];
                CGPoint mousePoint = CGPointMake(pt.x, [NSScreen mainScreen].frame.size.height - pt.y);

                CGEventRef theEvent = CGEventCreateMouseEvent(NULL, evType, mousePoint, kCGMouseButtonLeft);
                CGEventSetType(theEvent, evType);
                CGEventPost(kCGHIDEventTap, theEvent);
                CFRelease(theEvent);

                //return theEvent;
            }

            break;
        }
    }

    _lastEvent = [event CGEvent];
    CFRetain(_lastEvent); // must retain the event. will be released by the system
    return _lastEvent;
}

使用CGEventCreateMouseEvent()进行双击

OSX将鼠标左键分配给键盘键

推荐答案

Karabiner 现在可在macOS上运行10.12及更高版本.

Karabiner now works on macOS 10.12 and later.

这篇关于将fn重新映射到OSX上的鼠标左键的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！