QScrollArea doesn't dynamically create Scroll Bars

gblessed

Hi, I created a QScrollArea widget and placed some labels on it. However when the texts are longer, it doesn't dynamically add a scrollbar. How do I add it manually? Thanks in anticipation

mrjj

Hi
Right click a free area on the ScrollArea and apply layout from menu.
It should then show scrollbars.
alt text

gblessed

@mrjj hi, thanks for your time so far. am quite confused, because when I do it in designer mode it works , however when I do it by coding it doesn't work. Am placing the scrollArea on Qstackedwidget.
This describes what I did :
vlayout-> addwidget(mylabel);
scrollarea->setlayout(vlayout);
pagelayout->add widget(scrollarea); //QVBox object
page->set layout(pagelayout);//stackedwidget's pahr

jsulm

@gblessed You can check the generated code when using the designer to compare it to your own code.

etla

I had a similar problem earlier. This is the relevant code in my main():

  MainPanel *mainPanel = new MainPanel;

  QScrollArea *area = new QScrollArea;
  area->setWidget(mainPanel);
  area->setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
  area->setMaximumSize(mainPanel->size() + QSize(2, 0));
  area->setMinimumHeight(mainPanel->height());

  MainWindow *mainWindow = new MainWindow;
  mainWindow->setCentralWidget(area);
  mainWindow->show();

Two notes:
MainWindow inherits QMainWindow.
The addition of QSize(2,0) is only there because otherwise the scroll bar never disappeared.

Now, the problem I had was that MainPanel contains an clickable image but QScrollArea didn't detect the size of it. That is until I added this in the MainWindow constructor:

    QImage image(getPanelImage().c_str());
    setMinimumSize(image.size());
    setMaximumSize(image.size());

Those two last lines are probably what you're looking for. Don't know if this is the RIGHT way to do it, but it worked. ;)