我找到了一个可能很奇怪的解决方案 - 使用 Qt 事件系统。
int main(int argc, char[]* argv)
{
QApplication app( argc, argv );
QStringList arguments = app.arguments();
if( arguments.count() == argc ) arguments.removeFirst();
Logic appLogic( NULL, &app );
#ifdef Q_OS_MAC
app.installMessageHandler( &appLogic );
// Here we should alreasy get FileOpenEvent, if it occurs
// NOTE: without this FileOpenEvent will arrive LATER
// than the DryRunEvent!
app.processEvents();
// If there is no file open event in the queue,
// we should just open the blank program window
// NOTE: Qt takes ownership of this event object,
// so you should not delete it manually
DryRunEvent* runEv = new DryRunEvent( p );
a.postEvent( &l, runEv, Qt::LowEventPriority );
#endif
...
#ifndef Q_OS_MAC
if( ! appLogic.start( arguments ) ) return 0;
#endif
return app.exec();
}
自定义事件标题:
class BaseEvent : public QEvent
{
public:
BaseEvent( QEvent::Type& eType ) : QEvent( getEventType( eType ) )
{
}
~BaseEvent() {}
QEvent::Type getEventType( QEvent::Type& eType )
{
if( eType == QEvent::None )
{
eType = static_cast<QEvent::Type>( QEvent::registerEventType() );
}
return eType;
}
};
class DryRunEvent : public BaseEvent
{
QStringList m_params;
public:
DryRunEvent( const Parameters& params ) :
BaseEvent( eventType ), m_params( params )
{
}
~DryRunEvent(){}
QStringList GetCmdLineParams() const { return m_params; }
public:
static QEvent::Type eventType;
};
自定义事件源:
QEvent::Type ViewerDryRunEvent::eventType = QEvent::None;
逻辑类头:
class Logic : public QObject
{
Q_OBJECT
Q_DISABLE_COPY( Logic )
public:
explicit Logic(QObject *parent, QApplication* application);
virtual ~Logic();
public slots:
bool Start( QStringList parameters );
void ReceiveParameters( QStringList parameters );
void Stop();
#ifdef Q_OS_MAC
bool Logic::WasStarted() const
{
... Determine wether logic was started or not ...
}
#endif
private:
#ifdef OS_MACOSX
// Virtual overrided functions
bool eventFilter( QObject* obj, QEvent* event )
{
if( event->type() == QEvent::FileOpen )
{
QFileOpenEvent* fileEvent = static_cast< QFileOpenEvent* >(event);
Q_ASSERT( fileEvent != NULL );
QString uri;
if( fileEvent->file().isEmpty() == false )
{
uri = fileEvent->file();
}
else if( fileEvent->url().isEmpty() == false )
{
uri = fileEvent->url().toString();
}
if( uri.isEmpty() == false )
{
if( WasStarted() ) ReceiveParameters( uri );
else Start( uri );
}
return false;
}
else if( event->type() == DryRunEvent::eventType )
{
DryRunEvent* myEvent = static_cast< DryRunEvent* >( event );
Q_ASSERT( myEvent != NULL );
QStringList cmdLineParams = myEvent->GetCmdLineParams();
Q_ASSERT( !WasStarted() );
if( WasStarted() ) return false;
if( !Start( cmdLineParams ) ) m_application->exit( 0 );
return false;
}
// Standard event processing
return QObject::eventFilter( obj, event );
}
#endif
};
我希望有人觉得这个东西有用:)