在头文件自定义类，基类为QEvent; 自定义发送事件类，基类为QCoreApplication。
class customEvent : public QEvent
{
public:
static const QEvent::Type MyEventType;
customEvent():QEvent(customEvent::MyEventType){
qDebug()<<"construct customEvent MyEventType is "<<MyEventType;
}
};
class MySender:public QCoreApplication
{
public:
MySender(int argc, char *argv[]):QCoreApplication(argc, argv) {}
bool notify(QObject *r, QEvent *e);
static bool sendEvent(QObject *r, QEvent *e);
static void postEvent(QObject *receiver, QEvent *event);
};
在。cpp文件初始化类。
const QEvent::Type customEvent::MyEventType = (QEvent::Type)QEvent::registerEventType(QEvent::User+100);
bool MySender::notify(QObject *r, QEvent *e)
{
qDebug()<<"notify got event MyEventType !\n";
if(e->type() == customEvent::MyEventType){
qDebug()<<"MyEventType is coming!\n";
//return false;
}
return QCoreApplication::notify(r, e);
}
bool MySender::sendEvent(QObject *r, QEvent *e)
{
qDebug()<<"sendEvent got event MyEventType !";
qDebug()<<"e->type() == "<<e->type();
qDebug()<<"MyEventType is "<<customEvent::MyEventType;
if(e->type() == customEvent::MyEventType){
qDebug()<<"MyEventType is coming!\n";
//return false;
}
return QCoreApplication::sendEvent(r, e);
}
void MySender::postEvent(QObject *r, QEvent *e)
{
qDebug()<<"postEvent got event MyEventType!\n";
if(e->type() == customEvent::MyEventType){
qDebug()<<"MyEventType is coming!\n";
//return false;
}
QCoreApplication::postEvent(r, e);
}
下面是main.cpp内容。
class MyArmy:public QObject
{
public:
MyArmy() {}
void MyEventHandler(QEvent *e);
bool event(QEvent *e);
};
//
class MyWatcher:public QObject
{
public:
MyWatcher() {}
bool eventFilter(QObject *r, QEvent *e);
};
MySender *psender;
MyArmy army;
customEvent customE;
MyWatcher wathcer;
extern "C" {
void notifyGUI()
{
//QCoreApplication::postEvent(&army, &customE);
//QCoreApplication::sendEvent(&army, &customE);
//psender->notify(&army, &customE);
psender->sendEvent(&army, &customE);
//psender->postEvent(&army, new customEvent);
}
}
int main(int argc, char *argv[])
{
//QCoreApplication a(argc, argv);
MySender sender(argc, argv);
psender = &sender;
// MyArmy army;
// customEvent customE(MyEventType);
// MyWatcher wathcer;
registerNotifyFunction(notifyGUI);
army.installEventFilter(&wathcer);
//sender.notify(&army, &customE);
//sender.sendEvent(&army, &customE);
//sender.postEvent(&army, &customE);
return sender.exec();
//return a.exec();
}
void MyArmy::MyEventHandler(QEvent *e)
{
qDebug()<<"Event being handled!";
e->accept();
}
bool MyArmy::event(QEvent *e)
{
if(e->type() == customEvent::MyEventType){
qDebug()<<"event is MyEventType";
this->MyEventHandler(e);
if(e->isAccepted()){
qDebug()<<"The event is handled!";
qDebug()<<"e->type() == "<<e->type();
return true;
}
}
return QObject::event(e);
}
bool MyWatcher::eventFilter(QObject *r, QEvent *e)
{
if(e->type() == customEvent::MyEventType){
qDebug()<<"I DO NOT WANNA FILTER";
//return false;
}
return QObject::eventFilter(r, e);
}
其中，自定义事件是从网上搜的例子。详细内容参考：http://blog.csdn.net/michealtx/article/details/6866094。多谢原作者。
QT引用的C库代码：
typedef void (*c_NotifyFn)();
void registerNotifyFunction(c_NotifyFn fn);
c_NotifyFn c_fun;
void *thr_fun()
{
sleep(3);
c_fun();
return NULL;
}
int createthread()
{
int ret;
pthread_t pid;
ret = pthread_create(&pid, NULL, thr_fun, NULL);
if(ret != 0){
printf("Create pthread failed!\n");
return -1;
}
return 0;
}
void registerNotifyFunction(c_NotifyFn fn)
{
c_fun = fn;
createthread();
}
多谢版主给的意见。
