我正在将游戏从 pc 移植到 osx,但我遇到了输入事件。主游戏窗口是一个与 C++ 后端交互的可可应用程序。pc 代码使用 DirectInput 和 windows 消息来生成游戏可以理解的键盘和鼠标事件。
当我第一次启动端口时,我用 Carbon 事件处理替换了 windows 消息,但后来发现 Cocoa 应用程序不会触发 carbon 事件。我做了更多的阅读,发现了 HIDManager,它似乎可以做我想做的事情,并且可以从 c++ 访问。使用此处的帖子中的信息使用 IOHIDManager 获取修饰键事件我设法使键盘输入正常工作,但到目前为止还无法扩展示例代码以生成鼠标事件。代码如下:
void myHIDCallback(void* context, IOReturn result, void* sender, IOHIDValueRef value)
{
IOHIDElementRef elem = IOHIDValueGetElement(value);
if (IOHIDElementGetUsagePage(elem) == 0x07)
{
// Keyboard events
card32 scancode = IOHIDElementGetUsage(elem);
if (scancode >= 4 && scancode <= 231)
{
long pressed = IOHIDValueGetIntegerValue(value);
KEY_EVENT_DETAILS details = { KEY_EVENT_NONE, NUM_KEYS };
for (card32 n=0; n<NUM_KEYS; ++n)
{
if (n_direct_input_mappings[n].direct_input_key == scancode)
{
details.key_type = n_direct_input_mappings[n].key;
break;
}
}
switch (pressed)
{
case 0:
details.event_type = KEY_EVENT_KEY_DOWN;
break;
case 1:
details.event_type = KEY_EVENT_KEY_UP;
break;
}
sApplication->handle_key_event(details);
}
}
else
if (IOHIDElementGetUsagePage(elem) == 0x02)
{
// Mouse events
card32 usage = IOHIDElementGetUsage(elem);
long pressed = IOHIDValueGetIntegerValue(value);
}
else
{
}
}
CFMutableDictionaryRef myCreateDeviceMatchingDictionary(UInt32 usagePage, UInt32 usage)
{
CFMutableDictionaryRef ret = CFDictionaryCreateMutable(kCFAllocatorDefault, 0, &kCFTypeDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks);
if (ret)
{
CFNumberRef pageNumberRef = CFNumberCreate(kCFAllocatorDefault, kCFNumberIntType, &usagePage);
if (pageNumberRef)
{
CFDictionarySetValue(ret, CFSTR(kIOHIDDeviceUsagePageKey), pageNumberRef);
CFRelease(pageNumberRef);
CFNumberRef usageNumberRef = CFNumberCreate(kCFAllocatorDefault, kCFNumberIntType, &usage);
if (usageNumberRef)
{
CFDictionarySetValue(ret, CFSTR(kIOHIDDeviceUsageKey), usageNumberRef);
CFRelease(usageNumberRef);
return ret;
}
}
CFRelease(ret);
}
return NULL;
}
bool acquire_hardware_controllers(CA::Application& app, CAWindow& window_handle)
{
sApplication = &app;
// Setup the keyboard event handler
sHIDManager = IOHIDManagerCreate(kCFAllocatorDefault, kIOHIDOptionsTypeNone);
IOHIDManagerOpen(sHIDManager, kIOHIDOptionsTypeNone);
CFMutableDictionaryRef mouse = myCreateDeviceMatchingDictionary(0x01, 2);
CFMutableDictionaryRef keyboard = myCreateDeviceMatchingDictionary(0x01, 6);
CFMutableDictionaryRef keypad = myCreateDeviceMatchingDictionary(0x01, 7);
CFMutableDictionaryRef matchesList[] = {
keyboard,
keypad,
mouse
};
CFArrayRef matches = CFArrayCreate(kCFAllocatorDefault, (const void**)matchesList, 3, NULL);
IOHIDManagerSetDeviceMatchingMultiple(sHIDManager, matches);
IOHIDManagerRegisterInputValueCallback(sHIDManager, myHIDCallback, NULL);
IOHIDManagerScheduleWithRunLoop(sHIDManager, CFRunLoopGetMain(), kCFRunLoopDefaultMode);
}
如果有人可以帮助我,那就太好了。如果我不能让它工作,那么我想我可以转到 Cocoa 事件处理,但是 pc 代码也有一些我希望实现的键盘和鼠标轮询,我不确定 Cocoa 是否支持轮询键盘状态 - 虽然我很乐意得到纠正。
TIA。