[solved] Translation on the fly crashes

skwateur

oh. Do you want the full code of the class ?

skwateur

Or I can send you the source files by email if you want. Maybe it could be easier for you to see what's wrong

SGaist

You can also use a service like "pastbin":http://pastebin.com/

skwateur

Should I paste all my code with pastbin SGalst ?

SGaist

Only what is needed to build and trigger the crash

skwateur

It is a graphic application. You would need the images files to be able to hit the button.

Any way I can give it to you ?

SGaist

What do you mean by "images files to be able to hit the button" ?

skwateur

In order to trigger the crash, you have to run the application then hit a button to load a widget. Then you have to hit another button to start the translation. (and then it crashes).

If you want to trigger the crash yourself, you would need the whole program I think. (I have got too many classes ad I don't really know what is the minimal stuff you would need to be able to compile it)

skwateur

It used to work fine before. Dunno what I changed, god damn it it's driving me crazy

SGaist

CVS to the rescue ! Or if it's not an option, the best technique is to strip your software down (or rebuild it from the ground) until you either have the bug again or it stop to happen (depends which direction you started with

skwateur

Unfirtunately, I do not have any CVS system on my laptop (should have...)

Have you ever used Qt debugger ? Look like it's really useless to me. It just show me the assembler code. What am I supposed to do with that ?

SGaist

All recent CVS system proposes to create local repositories that you can use.

Generally this means that you are trying to debug a release version

skwateur

I will think about it.

I was debugging the debug version lol

skwateur

god... I just fixed it !
Thanks for your help and your time

SGaist

What was the problem ?

You're welcome !

Don't forget to update the thread's title prepending solved so other forum users may know a solution has been found :)

skwateur

So let me explain the situation, it may helps people.

I have a mainWindow which contains a mainWidget which in turns load several secondary widgets. (loaded one by one)

When you add a translation in your application using qApp->installTranslator(& translator) then all the following calls to QObject::tr() will look up in the translator for a translated text. So you should call retranslateUi() after
qApp->installTranslator() by reimplementing QWidget::changeEvent() and intercept any QEvent::LanguageChange event.

In order to translate dynamically my secondary widgets I had to reimplement each widget's ChangeEvent(*event)
function and call retranslateUi(), which is what I did.
And this is what causes the problem.

I was intercepting the event LanguageChange in the mainWidget and was calling retranslateUi() right after. LanguageChange was also intercepted by the secondary widget (which is a child of mainWidget) and retranslateUi() was called aswell.

I had to remove the call of retranslateUi() in the mainWidget (There was nothing but tooltips to translate in this widget) then everything worked.
Here is the code :

MainWindow :
@
MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{
...
translator = new QTranslator();

connect(sysSettings,SIGNAL(toEnglish()),this,SLOT(changeToEnglish()));
connect(sysSettings,SIGNAL(toFrench()),this,SLOT(changeToFrench()));

...
}

void MainWindow::changeToFrench()
{
if ( translator )
qApp->removeTranslator( translator );
}

void MainWindow::changeToEnglish()
{
if ( translator )
qApp->removeTranslator( translator );

translator->load( "dcl_en",QApplication::applicationDirPath());
qApp->installTranslator( translator );

}

void MainWindow::changeEvent(QEvent *e)
{
if(e->type() == QEvent::LanguageChange)
{
ui->retranslateUi(this);
retranslateUi();
}
QMainWindow::changeEvent(e);
}

void MainWindow::retranslateUi()
{
system_settings->setText(tr("Paramètres système"));
about->setText(tr("A propos..."));
}
@

MainWidget :
@
void mainWidget::changeEvent(QEvent *e)
{
if(e->type() == QEvent::LanguageChange)
{
retranslateUi();
}
}

void mainWidget::retranslateUi()
{
ui->btn_addSpec->setToolTip(tr("xx"));
ui->btn_delSpec->setToolTip(tr("xx"));
ui->btn_corp->setToolTip(tr("xx"));
ui->btn_curv->setToolTip(tr("xx"));
ui->btn_identity->setToolTip(tr("xx"));
ui->btn_eggs->setToolTip(tr("xx"));
ui->btn_sante->setToolTip(tr("xx"));
}
@

a secondary widget :
@
void ui_identity::changeEvent(QEvent *e)
{
if(e->type() == QEvent::LanguageChange)
{
ui->retranslateUi(this);
this->translateUi();
}
}

void ui_identity::translateUi()
{
QStringList list=(QStringList()<<tr("xxx")<<tr("yyy")<<tr("zzz"));
ui->cbx_sex->addItems(list);

ui->btn_modify->setToolTip(tr("ssssssss"));

}
@

and the setting window called from a menubar :
@
ui_sys_settings::ui_sys_settings(QWidget *parent) :
QWidget(parent),
ui(new Ui::ui_sys_settings)
{
ui->setupUi(this);
connect(ui->rdb_english, SIGNAL(clicked()),this,SIGNAL(toEnglish()));
connect(ui->rdb_french, SIGNAL(clicked()),this,SIGNAL(toFrench()));

if(parentWidget->getSettings()->getLanguage() == "French")
    this->ui->rdb_french->setChecked(true);
else if(parentWidget->getSettings()->getLanguage() == "English")
    this->ui->rdb_english->setChecked(true);

}

void ui_sys_settings::changeEvent(QEvent *e)
{
if(e->type() == QEvent::LanguageChange)
{
ui->retranslateUi(this);
}
}
@