QLabel vs. QLineEdit with Delegates

[moviemax]

Hi there,
I would like to display some text data from a model.
As mentioned in "books" or "combowidgetmapper" demo QLineEdit works just out of the box:

... 
QLineEdit nameEdit;
... 
mapper = new QDataWidgetMapper(this);
mapper->setModel(model);
mapper->addMapping(nameEdit, 0);

... 
QLineEdit nameEdit;
... 
mapper = new QDataWidgetMapper(this);
mapper->setModel(model);
mapper->addMapping(nameEdit, 0);

To copy to clipboard, switch view to plain text mode 

Because I just want to display the text I'm willing to use QLabel instead.
How do I have to derive QLabel that I can use it as QLineEdit

MyLabel namelabel;
... 
mapper = new QDataWidgetMapper(this);
mapper->setModel(model);
mapper->addMapping(nameLabel, 0);

MyLabel namelabel;
... 
mapper = new QDataWidgetMapper(this);
mapper->setModel(model);
mapper->addMapping(nameLabel, 0);

To copy to clipboard, switch view to plain text mode 

Or in other words why is the signal setText() not enough for QWidgetMapper
regards

[wysota]

Because QDataWidgetMapper doesn't know which property to use. Use the variant of the addMapping call that takes a property name.

[moviemax]

thank for your fast reply wysota
but the property name is the same like the object name and using the explicit function doesn`t change anything.
Which property should QDataWidgetMapper use? is there any further documentation?

[wysota]

but the property name is the same like the object name

No, the property name is "text".

[ChiliPalmer]

From a design-point of view, using a QLabel to display data might not be ideal. If you are developing an application that is intended to primarily run on windows, you should think about using a read-only QLineEdit without frame. The MSDN Design Guide advises to do so for optical reasons, but mainly to give the user the possibility to select and copy the data to the clipboard.

[moviemax]

@wysota
so you are right with given property "text" it works :

mapper_r1->addMapping( label_row1, 0, "text")

I didn`t get you at first.
@chilli
you are right I could not copy the text, but that is not so bad because there is also a table where users can copy strings from
Thanks all

[moviemax]

How can I set this thread to solved?

[wysota]

You can't