QStackedWidget setCurrentIndex slot not showing on Signals&Slots editor (QtCreator)

cxam

Hi! I just started developing apps on qt and I want to develop a multy layer qt app using the QtStackedWidget only with QtCreator signals and slots editor but the "setCurrentIndex" slot is just not showing. (I want to switch pages through a button in each page)

Thanks in advance.

SGaist

Hi,

How do you want to do that from a button ?

mrjj

hi
the
void setCurrentIndex(int index)
wants an int to tell which page to show.
The button clicked() or released() signal does not have
int as a parameter so you cannot hook that signal to that slot as there
is no way the button can send the index.

However, the button can call a normal slot in main and
there you can call setCurrentIndex with a index.

cxam

@SGaist you could imagine it as a setup wizard more or less, with 'next' or 'back' buttons

mrjj

@cxam
just to be sure, u did see
http://doc.qt.io/qt-5/qwizard.html
which is for wizard type of interface.

cxam

@mrjj said:

http://doc.qt.io/qt-5/qwizard.html

I said Setup Wizard as an example, what I exactly want is a main menu from where you can go to different interfaces, so I need buttons to go through pages. (This app is going to be running on a Raspberry Pi 2 using EGLFS)

mrjj

ok
QStackedWidget seems right for a multipage application.

cxam

@mrjj So what I did so far is that when I clic the button it declares an int with the index number, now I could set the variable I declared as the index for my QStackedWidget right ?

cxam

@mrjj More or less like this:


void MainWindow::on_Cambio1_clicked()
{
    int cambio1;
    cambio1 = 0;
    void QStackedWidget::setCurrentIndex(cambio1);
}

I don't know why but it comes up with this error:

error: invalid use of qualified-name 'QStackedWidget::setCurrentIndex'
     int QStackedWidget::setCurrentIndex(cambio1);
                                                ^

mrjj

@cxam
well i would expect something like
void MainWindow::on_Cambio1_clicked()
{
// int cambio1; <<< move to mainwinow.h in the class so all buttons have access to this "current-page"
cambio1++; // take next page//
ui->YourQStackedWidget->setCurrentIndex(cambio1);
}
set cambio1= 0 in mainwin constructor

A more clean way might be to use to functions
nextPage() and prevPage() in mainwindow
and the buttons just call that and it does the page switch back and forth.

please try this sample
https://www.dropbox.com/s/hpjtrr1xvo3lakw/stackedinteface.zip?dl=0

SGaist

The error comes from the fact that your are trying to call a class method like it's a static method.

Even if you don't use QWizard, you can take a look at its implementation to get started.

cxam

@SGaist @mrjj thank you very much for your help, I'll try that out and see how it goes.
Regards

cxam

This post is deleted!

mrjj

@cxam
Yes, u can have buttons inside the pages if you want.
Works the same.

cxam

@mrjj Hi! I managed to make everything just as I wanted, everything is going fine. The code example you sent me really did the trick. Thanks a lot.