Question about multiples forms.

Hello, i have a problem in my application.
I'm programming an app with several forms; for example:
i have the class "MainWindow" and "Find_Patient" so i have this files:
MainWindow.cpp
MainWindow.h
MainWindow.ui
Find_Patient.cpp
Find_Patient.h
Find_Patient.ui.

Suppose that in MainWindow i have a button, and when i click that button, Find_Patient shows up and MainWindow dissapears.
so this is the code for that:

Code:

---

void MainWindow::on_open_find_patient_clicked()
{
    Find_Patient *go = new Find_Patient
           go->show(); //this is going bring up Find_Patient
           this.hide(); //this is going to hide MainWindow
}

---

and this is the code for the button on Find_Patient.cpp to back to MainWindow

Code:

---

void Find_Patient::on_open_MainWindow_clicked()
{
    MainWindow *back = new MainWindow
           back->show(); //this is going bring up MainWindow 
           this.hide(); //this is going to hide Find_Patient
}

---

This code is totally functional, but it is not efficient.

Here's my problem:

Every time that i will click one of those buttons, the code will create a new object of type MainWindow or Find_Patient.
Doing this, it will ocupate a peace of memory every time that i click that button, because the previous object is hidden, not destroyed.
So my question is how i pass through forms?
This is the right way for doing it? or there is another way?.

i'm thinking on doing this:

Code:

---

MainWindow *back = new MainWindow
           back->show(); //this is going bring up MainWindow 
           this.deleteLater(); //this is going to delete Find_Patient

---

but i don't know if this is correct.

Sorry my bad english, im spanish.

Thanks!

1) define a signal in Find_Patient
2) connect it to the main window's show() slot after creating Find_Patient
3) emit the signal when you are closing Find_Patient

You can either make Find_Patient delete itself on close (e.g. setting the WA_DeleteOnClose widget attribute) or keeping the instance around and just showing it again when necessary.

Cheers,
_

Suppose that i want to keep one instance around and i want to show it or hide it many times... And i want to do that from different clases. Is that possible?

Sure.
You can either signal the main window that it should show the dialog or make the dialog instance accessible from elsewhere.

Cheers,
_