Localization of strings defined in QtDesigner

enmaniac

Hello all,

I have a dialog with some QLabel created with the QtDesigner. The label contains some text with few placeholders, something like:

This is item %1. You have %n references to it.

Now, in the source code I would like to supply values for both placeholders. Unfortunetely, I have no clue how I can do this.
I could move the whole label text into the code and use tr() but I would prefer to have it defined via QtDesigner.

Is it possible to achieve what I am looking for ?

Thank you all in advance!

kshegunov

@enmaniac
Hello,
How are you loading your form?
Usually you can access the label by its object name (specified in the creator) in your Ui::FormName generated class' instance. Let's say you have the form Ui class Ui::MyFormUiClass and you have MyDialog dialog holding an instance of the generated class. (Commonly) In the constructor you call the ui.setupUi() function of Ui::MyFormUiClass, and after that your label is available through that instance. An example:

class MyDialog : public QDialog
{
public:
    MyDialog(QWidget * parent = NULL);
    // ... Some other code
private:
    Ui::MyFormUiClass ui;
};

MyDialog::MyDialog(QWidget * parent)
    : QDialog(parent)
{
    ui.setupUi(this);    // This initializes your dialog with the form
    // Here you can now access the label
    QString labelText = ui.myLabelObjectName->text().arg(...).arg(...);   // Put your strings in
    ui.myLabelObjectName->setText(labelText);   // Update the text in the label
}

Kind regards.

enmaniac

Good morning Kshegunov,

Yes, this is exactly how I load my label. I can access it via UI object in my class.
Now MyDialog has a method to supply the arguments for placeholders, for instance:

void updateDescription(const QString& itemName, int itemReferences);

First parameter should substitute %1 in the label text and second %n.
I can retrieve a text from label and substitute first argument easily:

QString finalDescription = m_ui->myLabel->text().arg(itemName);

But how can I apply second parameter to replace %n ?

If I continue with the args, ie:

QString finalDescription = m_ui->myLabel->text().arg(itemName).arg(itemReferences);

%n does not get replaced and I am seeing the warning message:

QString::arg: Argument missing: "<html><head/><body>You are about to remove avatar.PNG. This item is referenced %n times. What do you want to do with reference items ?</body></html>" , 1

If I had the same string present in the source code of my dialog class I could use tr() like the following:

QString finalDescr = tr("This is %1 and has %n references", 0, referenceCount).arg(itemName);

But I wonder if it is also possible to somehow retrieve the label's original text with placeholders and apply tr().arg() to it.

Cheers!

kshegunov

@enmaniac
Hello,
%n is not a valid placeholder for arg(). Use %1, %2 and so on to indicate the order in which arg() should replace the placeholders. In your case simply replacing the %n with %2 should solve it. Additionally text put in the QLabel with QtCreator is translatable by default, so you shouldn't in principle worry about that.

Kind regards.

enmaniac

Hi there.

Indeed, arg() is not valid for %n. I simply tried it out to see what will happen.
Replacing %n with %2 wont make a trick since in the translation I need to properly handle plural forms, ie.

for %n == 1, the text should look like:

This is SOMETHING and has 1 reference

and for %n > 1:

This is SOMETHING and has 25 references

For other languages these rules are even more complicated.

So it boils down to how I can provide the value for %n if the text which contains it is created via QtDesigner.

Cheers!

kshegunov

@enmaniac
Hello,
I see now what you mean. Unfortunately, I'm not quite sure how you can achieve that. Maybe looking up the lingust manual or the internationalization documentation might help you.

Kind regards.

enmaniac

Thank you, I will.

For the time being I am gonna move the label text into source code.

Cheers for you help!