C++ 将自定义库回调转换为Qt信号
我有一个库（我正在开发，所以我可以稍微更改接口），它大量使用C回调。我需要将这些信号从回调转换为Qt信号。到目前为止，我最好的解决方案是代理QObject，它将对它的简单方法的调用转发给Qt信号C++ 将自定义库回调转换为Qt信号,c++,qt,callback,signals-slots,C++,Qt,Callback,Signals Slots,我有一个库（我正在开发，所以我可以稍微更改接口），它大量使用C回调。我需要将这些信号从回调转换为Qt信号。到目前为止，我最好的解决方案是代理QObject，它将对它的简单方法的调用转发给Qt信号 class QSignalProxy: public QObject { public: // callback handlers // ================================================== friend void __stdcall c
class QSignalProxy: public QObject
{
public:
// callback handlers
// ==================================================
friend void __stdcall callbackType1(void * callbackData, int x)
{
if (!callbackData)
return;
QSignalProxy * proxy = reinterpret_cast<QSignalProxy*>(callbackData);
proxy->onCallbackType1(x);
}
friend void __stdcall callbackType2(void * callbackData, float x)
{
if (!callbackData)
return;
QSignalProxy * proxy = reinterpret_cast<QSignalProxy*>(callbackData);
proxy->onCallbackType2(x);
}
friend void __stdcall callbackType3(void * callbackData, const char * x)
{
if (!callbackData)
return;
QSignalProxy * proxy = reinterpret_cast<QSignalProxy*>(callbackData);
proxy->onCallbackType3(x);
}
friend void __stdcall callbackType4(void * callbackData, LibObjectHandle * x)
{
if (!callbackData)
return;
QSignalProxy * proxy = reinterpret_cast<QSignalProxy*>(callbackData);
proxy->onCallbackType4(x);
}
QSignalProxy(QObject * parent = 0)
: QObject(parent)
{}
private:
// each call do nothing, but emit corresponding signal
void onCallbackType1(int x) { emit signalType1(x); }
void onCallbackType2(float x) { emit signalType2(x); }
void onCallbackType3(const char * x) { emit signalType3(QString::fromUTF8(x)); }
void onCallbackType4(const LibObjectHandle * x)
{
emit signalType4(LibObjectParams(x)); // LibObjectParams - some helper class, that allows to acces LibObject params
// in a conviniet way
}
public signals:
// Desired Qt signals, availible for connection
void signalType1(int x);
void signalType2(float x);
void signalType3(const QString & x);
void signalType4(const LibOjectParams & x);
}
int main()
{
MyLibCore * core = MyLibCreateCore();
QSignalProxy signalProxy;
MyLibSetCallbacks(core, &signalProxy /*as callback data*/,
callbackType1, callbackType2, callbackType3, callbackType4);
// start library, wich creates working threads, that will *emit signals* to callbacks
MyLibStart(core);
int retcode = MyLibWaitFinish(core);
return retcode;
}