inheritence problem?

[poporacer]

Ok....Things are starting to get clearer...still a couple of problems. To help make it understandable but brief I have my MainWindow class that has a stacked widget on it. Then I have my NamePage class.
My first problem is probably basic C++ stuff, but I can't seem to resolve it. In my NamePage class I have some functions that I need to call from my MainWindow class in a couple of places. I declare a pointer to a NamePage class on the heap in my constructor for the MainWindow class (called name). I thought that by doing so, I could reference the functions in each place in my MainWindow class, but it doesn't work that way. Do I have to create a pointer to a class in each function where I need to access the functions. What is the best way to do that.
The second issue is how to reference a lineedit widget on the NamePage ui from the MainWindow class.

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
     NamePage *name=new NamePage;
    ui->setupUi(this);
    ui->MainStackWidget->setCurrentIndex(0);
    name->updateRiderComboBox();
    }
void MainWindow::closeEvent(QCloseEvent *event)
{
    if(name->saveNameDataCheck())// name not declared in this scope
    {
        writeSettings();
        event->accept();
    }
    else
    {
        writeSettings();
        event->ignore();
    }
}

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
     NamePage *name=new NamePage;
    ui->setupUi(this);
    ui->MainStackWidget->setCurrentIndex(0);
    name->updateRiderComboBox();
    }
void MainWindow::closeEvent(QCloseEvent *event)
{
    if(name->saveNameDataCheck())// name not declared in this scope
    {
        writeSettings();
        event->accept();
    }
    else
    {
        writeSettings();
        event->ignore();
    }
}

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[Timoteo]

You need 'name' to be a member of MainWindow to do what you describe. Creating a pointer in each function will not only leak memory like crazy, but you won't be accessing the same NamePage each time. Remember, a pointer is a memory address. This memory address is where an instance of the class (an object) resides. Each time ask for a new X, a pointer to an X is given (a new allocation).

Instead of just plugging in code until it (appears) to work, why don't you instead read some books on programming?

[poporacer]

So how do you make name a member of MainWindow? I have read a couple of books on C++ programming. I also have the C++ Gui programming book for QT that I have read in its entirety and refer to on a regular basis. That was my concern about creating a new class and pointer for each function and trying to manage the memory to make sure all pointers are deleted when they need to be, and that is why I didn't continue and asked my question here. I thought that by creating a pointer to a memory location to my class on the heap that I could access it elsewhere. I am not just plugging in code to see if it works. When I get advice here I try to research it as well to understand what I am doing. Sometimes responses are vague (to a newbie) and one doesn't get much further in thier program. I do try different code in order to understand how it works, not to make it work.

[Timoteo]

class MainWindow
{
private:    
    NamePage* name;
}

class MainWindow
{
private:    
    NamePage* name;
}

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What you are confusing is scope and duration. A heap object does have an indefinite duration, but that doesn't influence the scope of the pointer. The pointer itself (that is, the variable that contains the memory address of the heap object) is passing out of visibility and being destroyed when you exit your constructor in your original code. The heap object lives on, though.

[poporacer]

Well, things are better and worse...I think The link you sent me helped, but I think the code they posted might be wrong.

ui->stackedWidget->addWidget( frmRealParts, "Realparts" );

ui->stackedWidget->addWidget( frmRealParts, "Realparts" );

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From the information I have read, addWidget only takes one parmeter, I could not find an overloaded function that takes two parameters. Am I looking at this wrong?
Now for the question. How do I access the widgets on the Name class widget on the stacked widget from the MainWindow class? For example, I want to access a combo box (cmbName) that is on the dialog that was added to the stacked widget.
I looked and couldn't find anything. I thought something to the effect of name->ui->cmbName but that isn't right.
And one problem I have is now I can't close the program. The Close button doesn't close the program and also clicking on the X in the main window doesn't close the window. This was working before and about the only thing I changed was moving the code for the stacked widget page from the MainWindow class to the Name class. I will keep looking but any hints what might be going on?