[Qt-interest] [Q]: How to make QMessageBox resizebale?

[Girish Ramakrishnan]

Vladimir Romanovskiy wrote:
> Hi,
> 
> Working with Qt4.4 , I want to have a resizable QMessageBox. Nothing
> really helps, what to do ?
> 
> Here is the code.
> 
>    QMessageBox msgBox;
>    msgBox.setWindowTitle( "test");
>    msgBox.setText( text);
>    msgBox.setDetailedText( textDetailed);
>    msgBox.setStandardButtons( QMessageBox::Save | QMessageBox::Discard);
>    msgBox.setDefaultButton( QMessageBox::Discard);
>    msgBox.setIcon( QMessageBox::Question);
>    msgBox.setTextFormat(Qt::AutoText);
>    msgBox.setSizePolicy( QSizePolicy(QSizePolicy::Preferred,
> QSizePolicy::Preferred));
>    msgBox.setSizeGripEnabled( true);
>    msgBox.setWindowFlags( msgBox.windowFlags() ^
> Qt::MSWindowsFixedSizeDialogHint);
> 
>    if ( QTextEdit * pTextEdit = msgBox.findChild<QTextEdit *>() )
>        pTextEdit->setHtml( textDetailed);
> 

Your approach is correct. However, QMessageBox does not use the layout
to set a fixed size - it uses QWidget::setFixedSize. What's tricky is
that it would actually do this just about when its shown.

So add the following lines at this point in the code,

msgBox.show();
msgBox.setMaximumSize(QWIDGETSIZE_MAX, QWIDGETSIZE_MAX); // override
setFixedSize of QMessageBox.

>    if ( msgBox.exec() == QMessageBox::Save )
>    {
>        /*doSave()*/;
>    }
> 

Girish