QMessageBox Details button label

[frog]

I'm seeking for a solution to change the label of the "Show Details..."/"Hide Details..." button of a message box.
I did it for a role based button, but this peculiar button is not in the role list and I m wondering how to get access to the button pointer to handle this.

[stampede]

I think this text is hardcoded in Qt sources (at least in 4.5.2):

// qmessagebox.cpp, lines 121 - 123
QString label(DetailButtonLabel label)
        { return label == ShowLabel ? QMessageBox::tr("Show Details...")
                                    : QMessageBox::tr("Hide Details..."); }

// qmessagebox.cpp, lines 121 - 123
QString label(DetailButtonLabel label)
        { return label == ShowLabel ? QMessageBox::tr("Show Details...")
                                    : QMessageBox::tr("Hide Details..."); }

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I have a working solution, it's not very nice but maybe you can use it.
Buttons are added in showEvent, so I've reimplemented it in order to get pointer to "hide/show details" button, it's added to the box with ActionRole. Next I've connected it to slot that will change it's text each time it's clicked. Here is the class:

// MyMsgBox.h
 
class MyMsgBox : public QMessageBox{
	Q_OBJECT
public:
	MyMsgBox( QWidget * parent = NULL ) : QMessageBox(parent){
		details = NULL;
	}
	MyMsgBox(  Icon icon, const QString & title, const QString & text, StandardButtons buttons = NoButton, QWidget * parent = 0, Qt::WindowFlags f = Qt::Dialog | Qt::MSWindowsFixedSizeDialogHint )
	:QMessageBox(icon,title,text,buttons,parent,f)
	{
		details = NULL;
	}
	void setDetailedText( const QString& text );
	void setDetailsButtonText( const QString& t1, const QString& t2 );
protected:
	virtual void showEvent( QShowEvent * event );
protected slots:
	void detailsClicked();
protected:
	QString _t1, _t2;
	QAbstractButton * details;
};

// MyMsgBox.h

class MyMsgBox : public QMessageBox{
	Q_OBJECT
public:
	MyMsgBox( QWidget * parent = NULL ) : QMessageBox(parent){
		details = NULL;
	}
	MyMsgBox(  Icon icon, const QString & title, const QString & text, StandardButtons buttons = NoButton, QWidget * parent = 0, Qt::WindowFlags f = Qt::Dialog | Qt::MSWindowsFixedSizeDialogHint )
	:QMessageBox(icon,title,text,buttons,parent,f)
	{
		details = NULL;
	}
	void setDetailedText( const QString& text );
	void setDetailsButtonText( const QString& t1, const QString& t2 );
protected:
	virtual void showEvent( QShowEvent * event );
protected slots:
	void detailsClicked();
protected:
	QString _t1, _t2;
	QAbstractButton * details;
};

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// MyMsgBox.cpp
 
void MyMsgBox::setDetailedText( const QString& text ){
	QMessageBox::setDetailedText(text);
	details = NULL;
}
 
void MyMsgBox::setDetailsButtonText( const QString& t1, const QString& t2 ){
	_t1 = t1;
	_t2 = t2;
}
 
void MyMsgBox::detailsClicked(){
	QAbstractButton * btn = qobject_cast<QAbstractButton*>(sender());
	if( btn ){
		if( btn->text() == tr("Show Details...") and _t1!=QString() ){
			btn->setText(_t1);
		} else if( _t2!=QString() ){
			btn->setText(_t2);
		}
	}
}
 
void MyMsgBox::showEvent( QShowEvent * event ){
	QMessageBox::showEvent(event);
	if( details == NULL ){
		foreach( QAbstractButton * btn, this->buttons() ){
			if( buttonRole(btn) == QMessageBox::ActionRole and btn->text() == QMessageBox::tr("Show Details...") ){
				details = btn;
				connect(details, SIGNAL(clicked()), this, SLOT(detailsClicked()));
				if( _t1 != QString() ){
					details->setText(_t1);
				}
				break;
			}
		}
	}
}

// MyMsgBox.cpp

void MyMsgBox::setDetailedText( const QString& text ){
	QMessageBox::setDetailedText(text);
	details = NULL;
}

void MyMsgBox::setDetailsButtonText( const QString& t1, const QString& t2 ){
	_t1 = t1;
	_t2 = t2;
}

void MyMsgBox::detailsClicked(){
	QAbstractButton * btn = qobject_cast<QAbstractButton*>(sender());
	if( btn ){
		if( btn->text() == tr("Show Details...") and _t1!=QString() ){
			btn->setText(_t1);
		} else if( _t2!=QString() ){
			btn->setText(_t2);
		}
	}
}

void MyMsgBox::showEvent( QShowEvent * event ){
	QMessageBox::showEvent(event);
	if( details == NULL ){
		foreach( QAbstractButton * btn, this->buttons() ){
			if( buttonRole(btn) == QMessageBox::ActionRole and btn->text() == QMessageBox::tr("Show Details...") ){
				details = btn;
				connect(details, SIGNAL(clicked()), this, SLOT(detailsClicked()));
				if( _t1 != QString() ){
					details->setText(_t1);
				}
				break;
			}
		}
	}
}

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test app:

int main(int argc, char *argv[])
{	
    QApplication a(argc, argv);
 
    MyMsgBox msg(QMessageBox::Information, "title", "text");
    msg.setDetailsButtonText("text1","text2");
    msg.setDetailedText("details");
    msg.show();
 
 
    return a.exec();
}

int main(int argc, char *argv[])
{	
    QApplication a(argc, argv);
    
    MyMsgBox msg(QMessageBox::Information, "title", "text");
    msg.setDetailsButtonText("text1","text2");
    msg.setDetailedText("details");
    msg.show();
    
		
    return a.exec();
}

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As I've said, it's not very nice solution and I'm not even sure if it will work in new versions of Qt, but maybe you can use it somehow

[Cupidvogel]

Doesn't work in Qt 5.3, 32 bit, Mac. The this->buttons() method returns an empty QList.