让我们说一个在线程中运行的对象A.它有一个指向QAxObject实例和一个对象B的指针。对象B有一个指向QAxObject的指针。
对象A创建一个线程并在其中移动对象B.
#ifndef OBJECTA_H
#define OBJECTA_H
#include <QtCore/QObject>
#include <QtCore/QThread>
#include <QAxObject>
#include "ObjectB.h"
class ObjectA : public QObject
{
Q_OBJECT
public:
ObjectA(QObject *parent = 0) : QObject(parent)
{
thread = new QThread();
activeX = new QAxObject();
objectB = new ObjectB(activeX);
objectB->moveToThread(thread);
ObjectA::connect(objectB, SIGNAL(someSignal()), this, SLOT(someSlot()));
thread->start();
}
protected slots:
void someSlot();
private:
QThread *thread;
QAxObject *activeX;
ObjectB *objectB;
};
#endif // OBJECTA_H
#ifndef OBJECTB_H
#define OBJECTB_H
#include <QtCore/QObject>
#include <QAxObject>
class ObjectB : public QObject
{
Q_OBJECT
public:
ObjectB(QAxObject *axObject, QObject *parent = 0) : QObject(parent)
{
activeX = axObject;
}
signals:
void someSignal();
private:
QAxObject *activeX;
};
#endif // OBJECTB_H
对象B是否能够使用与对象A共享的QAxObject?
我觉得这是不可能的。目前,我收到此错误:QAxBase: Error calling IDispatch member NewProject: Unknown error
。
线程A和线程B都不能使用QAxObject。
关于此的任何信息?
答案 0 :(得分:0)
以下是解释:Access a COM object from a 3rd party dll across threads 。
应该使用:
CoInitialize(0);
CoInitializeEx(NULL, COINIT_MULTITHREADED);