自己将其进行了简单的封装成一个QtDBusObject类，适用于支持dbus的系统中，构造函数的第一个参数为service名称，必须确保在系统中是唯一的。内容如下，不再详细解释，感兴趣的，请细读： QtDBusObject.hpp - #ifndef CHINUXTEAM_QTDBUS_OBJECT_HPP
#define CHINUXTEAM_QTDBUS_OBJECT_HPP
#include <QtCore>
#include <QtGui>
namespace ChinuxTeam
{
class QtDBusObject : public QObject
{
Q_OBJECT
public:
enum Status
{
NotRunning,
RaiseSuccess,
RaiseFailure
};
QtDBusObject(const QString &service, QObject *parent = 0);
~QtDBusObject();
bool isConnected();
Status isRunningAndRaiseStatus();
bool registerService();
bool registerObject();
void setActivationWindow(QWidget *widget);
public slots:
void raise();
private:
QString _service;
QWidget *_activationWindow;
};
}
#endif
QtDBusObject.cpp - #include <QtDBus>
#include "QtDBusObject.hpp"
namespace ChinuxTeam
{
QtDBusObject::QtDBusObject(const QString &service, QObject *parent)
: QObject(parent), _service(service), _activationWindow(NULL)
{
}
QtDBusObject::~QtDBusObject()
{
}
bool QtDBusObject::isConnected()
{
return QDBusConnection::sessionBus().isConnected();
}
QtDBusObject::Status QtDBusObject::isRunningAndRaiseStatus()
{
QDBusInterface iface(_service, "/", "",
QDBusConnection::sessionBus());
if (iface.isValid())
{
QDBusReply<void> reply = iface.call("raise");
if (reply.isValid())
{
return RaiseSuccess;
}
qDebug() << "call singleton instance raise failed"
<< reply.error().message();
return RaiseFailure;
}
return NotRunning;
}
bool QtDBusObject::registerService()
{
return QDBusConnection::sessionBus().registerService(_service);
}
bool QtDBusObject::registerObject()
{
return QDBusConnection::sessionBus().registerObject("/", this,
QDBusConnection::ExportAllSlots);
}
void QtDBusObject::setActivationWindow(QWidget *widget)
{
_activationWindow = widget;
}
void QtDBusObject::raise()
{
if (_activationWindow == NULL)
{
return;
}
_activationWindow->setWindowState(_activationWindow->windowState()
& ~Qt::WindowMinimized);
_activationWindow->raise();
_activationWindow->activateWindow();
}
}
使用示例： - #include <QtGui/QApplication>
#include <QtGui/QMainWindow>
#include "QtDBusObject.hpp"
int main(int argc, char *argv[])
{
QApplication app(argc, argv);
ChinuxTeam::QtDBusObject dbusobj("org.qtcn.sicompass");
if (!dbusobj.isConnected())
{
qDebug() << "cannot connect to dbus session bus";
app.quit();
return EXIT_FAILURE;
}
switch (dbusobj.isRunningAndRaiseStatus())
{
case ChinuxTeam::QtDBusObject::NotRunning:
break;
case ChinuxTeam::QtDBusObject::RaiseSuccess:
app.quit();
return EXIT_SUCCESS;
case ChinuxTeam::QtDBusObject::RaiseFailure:
app.quit();
return EXIT_FAILURE;
}
if (!dbusobj.registerService())
{
qDebug() << "register service failed";
app.quit();
return EXIT_FAILURE;
}
QMainWindow viewer;
dbusobj.setActivationWindow(&viewer);
if (!dbusobj.registerObject())
{
qDebug() << "register object failed";
app.quit();
return EXIT_FAILURE;
}
viewer.show();
return app.exec();
}
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