How can I resize QMessageBox?

Question

I have a QMessageBox which I\'d like it to be bigger. It\'s a simple QMessageBox with two standard buttons, Ok and Cancel. The problem is that it i

Answer 1

I wanted my QMessageBox width to adapt in proportion to the length of the text content with a certain amount of buffer to avoid line wrap. After surveying numerous forums and threads including this one, I came up with:

int x_offset = (2.0 * MainWindow::geometry().x());
int y_offset = (0.5 * MainWindow::geometry().y());
msgBox.setText(vers_msg.data());
QSpacerItem* horizontalSpacer = new QSpacerItem 
    (8 * vers_msg.size(), 0,
    QSizePolicy::Minimum, QSizePolicy::Expanding);
QGridLayout* layout = (QGridLayout*)msgBox.layout();
layout->addItem(horizontalSpacer, layout->rowCount(),
    0, 1, layout->columnCount());
msgBox.setGeometry(
    MainWindow::geometry().x() + x_offset,
    MainWindow::geometry().y() + y_offset,
    msgBox.geometry().width(),
    msgBox.geometry().height());

Adjust the hard numbers in x_offset, y_offset and horizontalSpacer to suit your situation. I was hoping it would be easier than this but at least this works.