Font changes not aplying

[cxam]

@SGaist Of Course, the font in particular is "Open Sans" so I downloades from the same site the one I installed in the computer and the one I intalled on the pi but nothing.

[SGaist]

Did you check that the application can find it ? QFontDatabase comes to mind for that.

[cxam]

@SGaist said:

QFontDatabase

So What I did using QFontDatabase:

QFontDatabase::addApplicationFont( "/usr/share/fonts/truetype/Open_Sans/OpenSans-Regular.ttf");

But nothing happened, so I checked that the font was currently installed using

fc-list

And indeed, it was installed but I don't know why not recognized by Qt.

[SGaist]

Did you check the returned id from addApplicationFont ?

[cxam]

@SGaist More or less, what I did to test that the font is working is this:

int id = QFontDatabase::addApplicationFont( "/usr/share/fonts/truetype/Open_Sans/OpenSans-Regular.ttf");
QString family = QFontDatabase::applicationFontFamilies(id).at(0);
QFont monospace(family);
qApp->setFont(monospace);

But it doesn't work.... No idea what can be happening

[SGaist]

What is the value of id ?

[cxam]

@SGaist I'm trying to show the value of the "id" variable through QDebug and the Application output but it's not showing.

[SGaist]

Use the debugger then or a dummy widget.

[cxam]

@SGaist Ok, I wasn't pressing the "Debug" button haha, anyways I've found that the "id" value is 0.

[mrjj]

@cxam said:
hi, just small question.
Since addApplicationFont dont return -1 for error, i wonder if he need to NEW the font as they talk about here
https://forum.qt.io/topic/23875/how-to-use-qfontdatabase-addapplicationfont
?

[cxam]

@mrjj said:

https://forum.qt.io/topic/23875/how-to-use-qfontdatabase-addapplicationfont

I think that's the answer to my problem but I'm unable to put it into my program, would you mind making it more explained for me please?

[cxam]

@mrjj Ok, I've got it. Thank you for your help :)

[mrjj]

@cxam
so did it make any difference?

[cxam]

@mrjj Yes, What I did was

QFontDatabase::addApplicationFont("/usr/share/fonts/truetype/Open_Sans/OpenSans-Regular.ttf");

and then select "Open Sans" on the QtDesigner