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c++qtqdialogqscrollarea

C++, Qt, Prevent Window from Resizing More than Actual Layout Height

Simple question, but I can't seem to get it right.

I have a QDialog containing a QScrollArea, which contains a QVBoxLayout. I want the dialog to be resizable vertically, but only up to the point where the scrollbars disappear, and the layout is shown in full.

I have tried QDialog::setMaximumHeight(int) with various parameters, such as size hints, but nothing has worked so far.

Solution

  • Based on the given description I suggest you to use QDialog::setMaximumHeight with QScrollArea::widget's sizeHint().height() as an argument like this:

    setMaximumHeight(widget->sizeHint().height());

    Take a look at the example I have prepared for you:

    https://github.com/scopchanov/SO-MaxDialogHeight

    Let me know if you need help adapting it to your particular task.