How to switch between two w.show()'s in main?

Sriu1

#include "mainwindow1.h"
#include "mainwindow2.h"
#include <QApplication>

int main(int argc, char *argv[])
{
QApplication a(argc, argv);
MainWindow1 w1;
w1.show();
MainWindow2 w2;
w2.show();
return a.exec();
}

In w1.show I have Finish button.After clicking "Finish" below
MainWindow2 w2;
w2.show();
should execute and I also have "Back" button in w2.show() UI, on clicking it I should go back to w1.show().
Is it possible through signals and slots?Because the signal might come from any of w1 or w2 instances? Please suggest.

J.Hilk

@Sriu1
it is, but I would rather suggest making a single parent Widget and handle it in there.

if you have to do it in main, than MainWindow 1 needs a signal e.g buttonFinished that is emitted when the button is pressed and MainWindo2 needs a signal as well, e.g buttonBack

int main(int argc, char *argv[])
{
QApplication a(argc, argv);
MainWindow1 w1;
w1.show();
MainWindow2 w2;

QObject::connect(&w1, &MainWindow1::buttonFinished, &w2, &MainWindow2::show);
QObject::connect(&w1, &MainWindow1::buttonFinished, &w1, &MainWindow1::hide);

QObject::connect(&w2, &MainWindow2::buttonBack, &w1, &MainWindow1::show);
QObject::connect(&w2, &MainWindow2::buttonBack, &w2, &MainWindow2::hide);
return a.exec();
}

Sriu1

But when main is executing it goes in a flow rite?w1.show() and w2.show() both will be executed.This should not happen.Should I use a condition ?when button finished is clicked do w2.show()

J.Hilk

@Sriu1 what do you mean?

take this basic example:

#include <QApplication>
#include <QPushButton>

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);

    QPushButton btn1("Finish");
    btn1.show();

    QPushButton btn2("Back");

    QObject::connect(&btn1, &QPushButton::clicked, &btn1, &QPushButton::hide);
    QObject::connect(&btn1, &QPushButton::clicked, &btn2, &QPushButton::show);

    QObject::connect(&btn2, &QPushButton::clicked, &btn2, &QPushButton::hide);
    QObject::connect(&btn2, &QPushButton::clicked, &btn1, &QPushButton::show);

return a.exec();
}

Sriu1

Hi @J-Hilk
Consider the below code

```
  int main(int argc, char *argv[])
```
```
 {
```
```
 QApplication a(argc, argv);
```
```
     MainWindow1 w1;
```
```
       w1.show();
```
```
      MainWindow2 w2;
```
```
       w2.show();
```
```
       return a.exec();
```
```
      }
```

When w1.show() executes at line 14, I want line 15 and 16 to execute only when "Finish" is clicked in w1.show().Basically I want to pause the execution of main till finish signal is generated.

J.Hilk

@Sriu1
have you tried the example main I provided?

Basically I want to pause the execution of main till finish signal is generated.

that's not how an event loop or an event driven program works!

Sriu1

@J-Hilk
Thanks for the reply.I tried your code.I was looking for something like that.