Update data send from class B to class A

Isidro Perla

Hello!, I want to send the values of the global var time from my class myopenglwidget.cpp to mainwindow.cpp, in a label called lb_ax, My var time changes values constantly, and I need to sending from myopenglwidget to mainwindow, those values in that label, here are some fragments of the most importantly part of my code:

//mainwindow.cpp

MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{
ui->setupUi(this);

MyOpenGLWidget *a = new MyOpenGLWidget;

bool result = connect(a, SIGNAL(textChanged(QString)),ui->lb_ax, SLOT(setText(QString)));

qDebug()<<"conn;" <<result;

a->someFunctionThatChangesText("");

QApplication::processEvents();
QWidget::repaint();

update();

}

//mainWindow.h

public:
void UpdateLabel(const QString text);

//myopenglwidget.cpp

void MyOpenGLWidget::someFunctionThatChangesText(const QString& newtext){
emit textChanged(QString::number(time));
}

//myopenglwidget.h

signals:
void textChanged(QString);
public:
void someFunctionThatChangesText(const QString& newtext);

I want to know what is the problem here, because now only send the initialized value of the var, that is 0, some ideas please??

Christian Ehrlicher

It's the same question as here:
https://forum.qt.io/topic/112755/send-real-time-data-from-another-class-to-mainwindow-label/2

Don't double post.