signals:
    void foo ( QString );
    void foofoo ( const & QString );

signals:
    void foo ( QString * );
    void foo ( QString & );
    void foofoo ( const QString * );

    typedef QSharedPointer< MyWidget > Widget;
    myWidgetList.append( Widget( new MyWidget ) ); // добавление

    ...

    myWidgetList.removeAt( i ); // удаление

    ...

    myWidgetList.clear(); // удаление всех сразу

Server_Settings *WindowSett = new Server_Settings(this);
WindowSett->setWindowFlags( Qt::Window );
WindowSett->show();

//ок
for(td_map::iterator it=m.begin();it!=m.end();/*it++*/)
{
    if(it->second==2)
    {
        it = m.erase( it );
    }
    else
    {
        ++it;
    }
}

inline
bool removeCondition ( const td_map::value_type & value ) { return value.second == 2; }

//....
void funct()
{
    std::remove_if( m.begin(); m.end(); removeCondition );
};

class CWork //класс рабочего объекта
...

class CMyThread : public QThread
{
    typedef QSharedPointer< CWork > WorkPointer;
    WorkPointer work;

public:
    CWork * workObject () const;

signals:
   void workCreated ();

};

void CMyThread::run()
{
    work = WorkPointer( new CWork() );

    emit workCreated();

    exec();
}


// применение
int main ( int argc, char ** argv )
{
    QApplication app( argc, argv );

    CMyThread thread1;
    QEventLoop loop1;
    connect( &thread1, SIGNAL( workCreated() )
        , &loop1, SLOT( quit() ) );
    tread1.start();
    // ожидаем сигнала от tread1
    loop1.exec();

    CMyThread thread2;
    QEventLoop loop2;
    connect( &thread2, SIGNAL( workCreated() )
        , &loop2, SLOT( quit() ) );
    tread2.start();
    // ожидаем сигнала от tread2
    loop2.exec();

    // соединяем на здоровье
    connect ( tread1.workObject(), SIGNAL( ... )
        , tread2.workObject(), SLOT( ... ) ) );

    return app.exec();
}

Цитата(RazrFalcon @ 7.10.2012, 22:43)

int step = 24;
DEBUG(step) // "step: 24"

qDebug() << "step:" << step;

#define MY_DEBUG( var ) qDebug() << #var << ( var );

Цитата(__ilya__ @ 21.8.2012, 13:03)

QDataStream & operator << ( QDataStream & stream, const Data & value )
{
    return stream
        << value.s1
        << value.s2
        << value.s3
        << value.i1
        << value.i2
        << value.i3
        << value.d1
        << value.d2
        << value.d3;
}

QDataStream & operator >> ( QDataStream & stream, Data & value )
{
    return stream
        >> value.s1
        >> value.s2
        >> value.s3
        >> value.i1
        >> value.i2
        >> value.i3
        >> value.d1
        >> value.d2
        >> value.d3;
}

class Data
{
    friend QDataStream & operator << ( QDataStream & stream, const Data & value );
    friend QDataStream & operator >> ( QDataStream & stream, Data & value );

private:
    QString s1, s2, s3;
    int i1, i2, i3;
    double d1, d2, d3;
};

Цитата(__ilya__ @ 21.8.2012, 13:03)

QDataStream stream( &device );

QVector< Data > contaner;

// чтение
stream
    >> contaner;

...

// запись
stream
    << contaner;

Цитата(RaiaN @ 18.7.2012, 7:36)

connect(widget, SIGNAL(leftArrowClicked()), this, SLOT(decrementMonth()));

connect(widget, SIGNAL(keyClicked(int)), this, SLOT(onKeyClicked( int )));

Цитата(crashsp @ 31.1.2012, 11:17)

Parent is QTcpSocket(0x141adcc), parent's thread is QThread(0x6a2fa0), current thread is ServerWorker(0x141adc0)

        qWarning("QObject: Cannot create children for a parent that is in a different thread.\n"
                 "(Parent is %s(%p), parent's thread is %s(%p), current thread is %s(%p)" )

Цитата(urandom @ 13.12.2011, 22:46)

float data[1024];
QVector< float > vec_data( sizeof( data ) / sizeof( float ) );
memcpy( vec_data.data(), data, sizeof( data ) );

float data[1024];
QByteArray vec_data( reinterpret_cast< char * >( data ), sizeof( data ) );

MyThread::MyThread(QObject *parent) :
    QThread(parent)
{
}

MyThread::~MyThread()
{
    quit();
}

/// PROTECTED ///

void MyThread::run()
{
    MyObject myObject; 
    connect(parent(), SIGNAL(mySignal(QString)), &myObject, SLOT(mySlot(QString)));
    // тут еще куча сигналов/слотов

    exec();
}

table->setCurrentCell ( row, column, QItemSelectionModel::Select );

table->selectionModel()->select( index, QItemSelectionModel::Select );

table->setSelectionMode(QAbstractItemView::MultiSelection);
table->setSelectionBehavior( QAbstractItemView::SelectRows );

emit tryToDoSmth();

void run()
{
   while(true){
       msleep(150);    
       emit tryToDoSmth();
   }
}

void run()
{
   while( not_stoped ){
       msleep(150);    
       emit tryToDoSmth();
   }
}

void setStopFlag ( bool yes )
{
    not_stoped = yes;
}

void run()
{
    QTimer notifier; //  notifier принадлежит дочернему потоку, this принадлежит главному
    connect( &timer, SIGNAL( timeout() ), this, SIGNAL( tryToDoSmth() );
    notifier.start( 150 );
    exec();
}

MyThread *thread = new MyThread();

MyThread *thread = new MyThread( QCoreApplication::instance() );

thread->start();        //запускаем очередь потока

Цитата(Флинт @ 31.10.2011, 10:19)

if ( QByteArray( model()->metaObject()->className() ) == QByteArray( "MyModel" ) )
{
    // моя модель
}

if ( model()->metaObject() == &MyModel::staticMetaObject )
{
    // моя модель
}