Class variable updating / QLabel | Thread

paul_b

Hello guys , i'm totally new to Qt and i have installed the Visual studio add-in for Qt .
I have some c++ knowledge but i'm kind of self-educated with programmations (mainly tutorial etc) so i make a lot of mistake ^^ .

I was wondering where in your code the gui you are coding are 'updating' because if i want to update a class variable you'll need to :

Create a new Thread for updating those
Find where in your code the gui is updated to put your own update function

I have a problem doing each of them , for the new thread i can't see how can i pass a class object through a LPVOID params .

And finally i have tried to implement a push button which call a function to update the variable but it's not working either .

Code :

Class constructor :

MaFenetre::MaFenetre() : QDialog()
{

labelTime = new QLabel("TIME : " + timeString , this);
	labelTime->move(800, 20);

boutonRefresh = new QPushButton("Refresh", this);
	boutonRefresh->move(600, 450);

// CONNECTIION BOUTON ETC

	QObject::connect(boutonRefresh, SIGNAL(pressed()), this, SLOT(update()));
}

Class defenition :

class MaFenetre : public QDialog // On hérite de QWidget (IMPORTANT)
{

	Q_OBJECT;

public:
	MaFenetre();
	QString timeString;

public slots:

	void update(){
	QTime time = QTime::currentTime();
	timeString = time.toString();
	}

private :
	
	QPushButton *boutonRefresh;
	QPushButton *boutonSettings;
	QPushButton *boutonQuit;

	QLabel *labelUserName;
	QLabel *labelTime;

	// PAGE 1
	QGroupBox *box;
	QGroupBox *box2;

	QLabel *labelGame;
	QLabel *labelVersion;
	QLabel *labelPatch;
	QLabel *labelDeveloppers;
	QLabel *labelDriver;
};

Thanks .

SGaist

Hi and welcome to devnet,

What variable do you want to update ?

Why do you think you need a thread for that ?

On a side note, update is a QWidget non virtual slot so you can't use that name.

In any case you should call labelTimr->setText("TIME :" + timeValue) to update the content of your QLabel.