signal/slot to add objects ?

[rimie23]

I read but i still have problem

QObject::connect(pushButton, SIGNAL(clicked()), Form, SLOT(close()));

QObject::connect(pushButton, SIGNAL(clicked()), Form, SLOT(close()));

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i want when i clic i add camera that mean i make like that

QObject::connect(add_button, SIGNAL(clicked()), this, SLOT(add_camera()));

QObject::connect(add_button, SIGNAL(clicked()), this, SLOT(add_camera()));

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?
but how i make signal/slot of the position (add_camera in this position)

[Spitfire]

You need intermediate slot to capture button click and from that slot emit signal with position constructed from values entered in your spin boxes:

// header
public slots:
void    onButtonClicked( void );
void    add_camera( const Ogre::Vector3& pos ); // it's just a concept, this slot should be in different class as otherwise there's no point using signals/slots
 
signals:
void    addCameraAt( const Ogre::Vector3& pos );

// header
public slots:
void    onButtonClicked( void );
void    add_camera( const Ogre::Vector3& pos ); // it's just a concept, this slot should be in different class as otherwise there's no point using signals/slots

signals:
void    addCameraAt( const Ogre::Vector3& pos );

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// connection
connect( buttonWithMagicNumber, SIGNAL( clicked() ), this, SLOT( onButtonClicked() ) );
connect( this, SIGNAL( addCameraAt( Ogre::Vector3 ) ), this, SLOT( add_camera( Ogre::Vector3 ) ) );

// connection
connect( buttonWithMagicNumber, SIGNAL( clicked() ), this, SLOT( onButtonClicked() ) );
connect( this, SIGNAL( addCameraAt( Ogre::Vector3 ) ), this, SLOT( add_camera( Ogre::Vector3 ) ) );

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// slot implementation
void    onButtonClicked( void ) 
{
    emit addCameraAt(
            Ogre::Vector3(
                this->doubleSpinBox->value(),
                this->doubleSpinBox2->value(),
                this->doubleSpinBox3->value()
            ) );
}

// slot implementation
void    onButtonClicked( void ) 
{
    emit addCameraAt(
            Ogre::Vector3(
                this->doubleSpinBox->value(),
                this->doubleSpinBox2->value(),
                this->doubleSpinBox3->value()
            ) );
}

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You will have to register Ogre::Vector3 type to use it with signals and slots (see qRegisterMetaType for more details).

If you already read the documentation for signals and slots, go back and read it again.
And again.