new SIGNAL / SLOT syntax

RahibeMeryem

Hi,

in the old way we can write:

    connect(worker , SIGNAL(_bigChip_changed(QImage)) ,this , SLOT(bigChip_update(QImage)));

I could find the syntax for new notation for "this":

   connect(worker , &Worker::_bigChip_changed , this , ??::bigChip_update);

How can say

,this , SLOT(bigChip_update(QImage)))

in new notation

Thanks..

VRonin

Use the type of this. See http://wiki.qt.io/New_Signal_Slot_Syntax

A real example:

class MyObject : public QObject{
Q_OBJECT
Q_DISABLE_COPY(MyObject)
public:
explicit MyObject(QObject* parent=Q_NULLPTR)
:QObject(parent)
,m_timer(new QTimer(this))
{
connect(m_timer,&QTimer::timeOut,this,&MyObject::timerTimeOut);
m_timer->start(1000);
}
private Q_SLOTS:
void timerTimeOut(){qDebug("Timeout!");}
private:
QTimer* m_timer;
};

It you like hurting yourself, you could use

connect(worker , &Worker::_bigChip_changed , this , &std::remove_const<std::remove_pointer<decltype(this)>::type>::type::bigChip_update);

but I see no scenario ever to use such a monstrosity

mrjj

alt text
Hehe VRonin, thats cool.
Im not sure if it should come with warning, dont do this at home ;)

So that basically strips the type info or what does it really do ?