How to put 2 Widgets in a MainWindow ?

[gen_mass]

Ok, if I change my mainwindow.cpp to this:

mainwindow::mainwindow(QWidget*p)
{
 
    double *buffer=NULL;
 
    plot=new Plot(100,250,buffer,buffer+1,this);
    data = new Data(250,buffer,this);
 
    QVBoxLayout* layout = new QVBoxLayout(this);
    data->on_watcher();
}

mainwindow::mainwindow(QWidget*p)
{

    double *buffer=NULL;

    plot=new Plot(100,250,buffer,buffer+1,this);
    data = new Data(250,buffer,this);

    QVBoxLayout* layout = new QVBoxLayout(this);
    data->on_watcher();
}

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I see my QTableWidget in the left corner, and no plot at all...

[Zlatomir]

In the code from last post you didn't add the widgets to layout.

Did you did that in your actual project? (You still need to do that)

mainwindow::mainwindow(QWidget*p)
{
 
    double *buffer=NULL;
 
    plot=new Plot(100,250,buffer,buffer+1,p);
    data = new Data(250,buffer,p);
 
    QVBoxLayout* layout = new QVBoxLayout(this);
 
     layout->addWidget(plot);
    layout->addWidget(data);
 
     //Start of on_watcher 
     data->on_watcher();
 
}

mainwindow::mainwindow(QWidget*p)
{

    double *buffer=NULL;

    plot=new Plot(100,250,buffer,buffer+1,p);
    data = new Data(250,buffer,p);

    QVBoxLayout* layout = new QVBoxLayout(this);

     layout->addWidget(plot);
    layout->addWidget(data);

     //Start of on_watcher 
     data->on_watcher();

}

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[gen_mass]

oopps , I meant:

mainwindow::mainwindow(QWidget*p)
{
 
    double *buffer=NULL;
 
    plot=new Plot(100,250,buffer,buffer+1,this);
    data = new Data(250,buffer,this);
 
    QVBoxLayout* layout = new QVBoxLayout(this);
 
    layout->addWidget(plot);
    layout->addWidget(data);
 
     data->on_watcher();
 
}

mainwindow::mainwindow(QWidget*p)
{

    double *buffer=NULL;

    plot=new Plot(100,250,buffer,buffer+1,this);
    data = new Data(250,buffer,this);

    QVBoxLayout* layout = new QVBoxLayout(this);

    layout->addWidget(plot);
    layout->addWidget(data);

     data->on_watcher();
   
}

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[Zlatomir]

Are you sure this is what you want

plot=new Plot(100,250,buffer,buffer+1,this); // the buffer pointer is NULL and you are adding 1 to that???

plot=new Plot(100,250,buffer,buffer+1,this); // the buffer pointer is NULL and you are adding 1 to that???

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[gen_mass]

That's not the problem....buffer acts as a chart...everything works fine in there....when I do a setCentralWidget(plot) I see my plot and my program does what it's supposed to..
Altought, now, I want to add a QTableWidget, which is created and filled in my data class, and I don't know how to put both on my MainWindow

[Zlatomir]

Do you get some warnings about mainWindow allready have a layout?

Try to add a QWidget *test = new QWidget(0); make it the parent of the layout QVBoxLayout* layout = new QVBoxLayout(test); and setCentralWidget(test);