make visible 1 layout at a time

benamiar

hello qt community,
i'm trying to make visible one layout at a time, i want something like the program bellow but with layouts

QStackedLayout* stackedwidget= new QStackedLayout();
 stackedwidget->addwidget(widget1);// the stackedlayout dispalayed ;
    stackedwidget->addwidget(widget2);// the stackedlayout;
    stackedwidget->setCurrentwidget(widget1);

i used the additem and setcurrentindex but i have a message said that QStackedLayout::addItem: Only widgets can be added

so i'm wondering if someone had this problem before, i need help please

thanks again ..

mrjj

Hi
And you are 10.000% sure that it was indeed a
QWidget you tried to insert?

in any case, the sample from the docs works without any warnings
and i could not make it say
"QStackedLayout::addItem: Only widgets can be added"

        QWidget *firstPageWidget = new QWidget;
        QWidget *secondPageWidget = new QWidget;
        QWidget *thirdPageWidget = new QWidget;

        QStackedLayout *stackedLayout = new QStackedLayout;
        stackedLayout->addWidget(firstPageWidget);
        stackedLayout->addWidget(secondPageWidget);
        stackedLayout->addWidget(thirdPageWidget);

        QVBoxLayout *mainLayout = new QVBoxLayout;
        mainLayout->addLayout(stackedLayout);
        centralWidget()->setLayout(mainLayout);

So if you can make it say so, please show the actual code with all definitions.
and also please mention Qt version , you are using.

Also, just as a note. There is also QStacketWidget that often is easier to use than
the raw QStackedLayout.

benamiar

ow sorry i'm using Qt5.

i think you didn't read the question well or that i wasn't clear enough :p , i'm trying to have one layout at a time and not one widget at a time it's mean that instead of inserting a widget in a stackedwidget i want to insert layouts. and use one layout at a time.

i know that their is a qstacked widget but i thought that qstacked layout would allow me to stack layouts which is not the case :).

thanks again

mrjj

@benamiar
Hi,
i think its me that didnt read it well :)
On second read, i see you want layouts.

It won't accept layouts. (AFAIK)
However, just use a widget, put the wanted layout on that and use it that way.
The Widget is transparent so should not matter.

Ah. yes. stacked layout kinda sounds like layouts in a stack indeed :)

benamiar

i didn't understand what your trying to say so you suggest to put a layout on widget ?

it won't even compile we can't convert a lyout to a widget, perhaps a widget can be converted to a layout but not the reverse.

J.Hilk

@benamiar the idea is to create a new QWidget, assign it your Layout, and than add it to the QStacledWidget

benamiar

@j-hilk assign a layout to a widget ? how is that even possible? you can add a widget to a layout but a layout to a widget? i'm lost ?

jsulm

@benamiar ?
https://doc.qt.io/qt-5/qwidget.html#setLayout
A layout isn't just somewhere in the air it is on a widget.

J.Hilk

@benamiar a fanction of every QWidget based widget

https://doc.qt.io/qt-5/qwidget.html#setLayout

edit: ninja sniped by @jsulm 😆

benamiar

@j-hilk thanks guys it's working