Robert Robert - 3 months ago 30
C++ Question

How to dynamically add a QScrollArea to a StackedWidget page and add widgets to it?

I'm currently building an application that consists of a

QStackedWidget
with several pages. The page itself was added in the designer. What I CAN do (in code):


  • add a QVBoxLayout to the page

  • add some custom widgets to it

  • set layout for the page



This works quite well, I can see my widgets appear on the page. These widgets have a fixed height of 25. When there are too many widgets, I can't see all of them. What DOES NOT work is adding a
QScrollArea
to the page that allows scrolling up and down, in case there are lots of widgets added to the page.

So here is my code for the situation "as is":

//The header file:

QVBoxLayout *valuesLayout;

//The corresponding .cpp file

valuesLayout = new QVBoxLayout();
valuesPage->setLayout(valuesLayout); //valuesPage is my QStackedWidget page
for (int j=0; j<100; j++)
{
valuesLayout->addWidget(new PaIndicator(0, "This is a test", 0)); // my custom widgets
}


How would I have to change/extend the code from above to make my widgets appear in a QScrollArea?

Update: After applying the changes mentioned below I ended up with this:
enter image description here

My now code looks exactly like the lines given in Shf's answer. I have the feeling that I'm getting closer, but something still seems to be wrong here.

Answer

You have to set a widget to your scroll area and add the contents to that widget:

QScrollArea *scrollArea = new QScrollArea;
QWidget *scrollWidget = new QWidget;
scrollWidget->setLayout(new QVBoxLayout);
scrollArea->setWidget(scrollWidget);
for (int j=0; j<100; j++)
{
   scrollWidget->layout()->addWidget(new PaIndicator(0, "This is a test", 0));  // my custom widgets
}

Then add your scroll area to your stacked widget's page:

valuesLayout->addWidget(scrollArea);
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