How do I auto-adjust the size of a QDialog depending on the text length of one of its children?

qt nokia qdialog
yan bellavance picture yan bellavance · Nov 4, 2009 · Viewed 26.3k times · Source

I have a QDialog I'm working with. It is made somewhat like a QMessageBox. I noticed that the size of the QMessageBox (and the size of its label) depends on the size of the message displayed.

How would I make the size of my QDialog adjust automatically like a QMessageBox? Presently my QDialog contains a button box and a label, and the QDialog is layout Vertical.

(I know I could just use the message box directly but eventually I will have more complex dialogs.)

Answer

Patrice Bernassola picture Patrice Bernassola · Nov 5, 2009

Automatic solution:

Use layouts and set size policies to QSizePolicy::Expanding. In QtDesigner, once all your children are placed on your QDialog, then click on the Adjust Size button next layout ones. Your QDialog will be automatically resized at runtime.

Manual solution:

The QWidget class has a method adjustSize that resize the QWidget to fit its content. Just call it when all children are set.

Related questions

Qt - remove all widgets from layout?

This doesn't seem easy. Basically, I add QPushButtons through a function to a layout, and when the function executes, I want to clear the layout first (removing all QPushButtons and whatever else is in there), because more buttons just get …

Read More
how to add menu dynamically in Qt

I want to add, submenu to a menu item dynamically. How can I achive this? I tried like this, I have created an Action and submenu. Then I have added the submenu to action. But, I have connected the “triggered” …

Read More
Documentation for Qt documentation comments? Qt + Doxygen?

Where can I find documentation for Qt documentation comments? I'm referring to how Qt uses a specific style for documentation comments, like so: /*! \class MyClassName \brief The MyClassName class is used as an example on Stack Overflow. This class serves …

Read More