How to correctly re-assign a pointer?

[homerun4711]

Hello!

I started another topic yesterday, but I guess it went far into detail.
My questions comes down to this:

How can I correctly re-assign a pointer?

In my case, I have a QtDesigner-Layout, which creates a QTableView:

public:
QTableView *tableView;
...
void setupUi(QDialog *AddressBook)
    {
       tableView = new QTableView(AddressBook);
    ...
    }

public:
QTableView *tableView;
...
void setupUi(QDialog *AddressBook)
    {
       tableView = new QTableView(AddressBook);
    ...
    }

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In the class which uses this layout I want to pass a pointer to a pre-defined QTableView to the one created by the layout.

AddressBook-class:

AddressBook::AddressBook(DataManager* dmgr, QWidget *parent): QDialog(parent)
{
    ...
   tableView = dmgr->customerTableView();
    ...
}

AddressBook::AddressBook(DataManager* dmgr, QWidget *parent): QDialog(parent)
{
    ...
   tableView = dmgr->customerTableView();
    ...
}

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DataManager-class

...
QTableView *m_customerTableView;
QTableView *customerTableView();
...
m_customerTableView = new QTableView;
...
QTableView *DataManager::customerTableView()
{
   return m_customerTableView;
}
...

...
QTableView *m_customerTableView;
QTableView *customerTableView();
...
m_customerTableView = new QTableView;
...
QTableView *DataManager::customerTableView()
{
   return m_customerTableView;
}
...

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I guess to avoid memory leaks I have to delete the original tableView created by QtDesigner.

I tried the following but could get it running, since I am not so familiar with pointers yet. (coming from Java) So there could be a misunderstanding on how pointers work.

In AddressBook-class:

delete tableView;
QTableView *tableView = dmgr->customerTableView();

delete tableView;
QTableView *tableView = dmgr->customerTableView();

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I hope you can help me.

Kind regards,
HomeR