How to change font size at the application?

maxim.prishchepa

I need change font size at the application, for example: at the settings user can choose: small, medium or large font size, how to dinamical change a font size at the all of application windows?

IamSumit

Hi
Using QFontDialog
"Font Dialog":http://qt-project.org/doc/qt-5/qfontdialog.html

IamSumit

Hi
in addition to answer of 2nd Question
"QApplication":http://qt-project.org/doc/qt-5/qapplication.html#setFont

hope it helps.

maxim.prishchepa

Tnx 4 answers!
About QApplication::setFont - i know that method, but when i set the font using it - nothing happend :( font still the same as was.

IamSumit

The behavior of fonts vary from OS to OS.
Did you pass second parameter as class in QApplication::setFont.?

maxim.prishchepa

nope, only put font object to the method.
i test at the linux, mac and android - nothing changed.
about second arg - i need change font size at the all of ui object.

IamSumit

Hi
Please pass second argument as well.
For eample if you want to change font of all QWidget then pass "QWidget"

maxim.prishchepa

emmm..... ok maybe some one know base container name for qml elements? :)

p3c0

Hi,

[quote author="Maxim Prishchepa" date="1412776706"]nope, only put font object to the method.
i test at the linux, mac and android - nothing changed.
about second arg - i need change font size at the all of ui object.[/quote]

Which Qt version are you using ? The below code works for me:
@
QGuiApplication app(argc, argv);
QFont f = app.font();
f.setFamily("Monaco");
f.setPointSize(32);
app.setFont(f);
QQuickView view;
...
@

maxim.prishchepa

Hi p3c0!
Tnx 4 answer!
I use Qt 5.3.2.

About your code: i should give to user posibility to chenge font on runtime, when QQuickView object is already created.
As options: check recurcive all child object at the QQuickView container, but it's take a time :( maybe some other options?

p3c0

Well then Binding is your friend here. Create a global variable for eg:
@
property real appfontSize: 12.0
@

Then bind this property to all other components font.pointSize wherever applicable and when the user chooses a font size, change appfontSize to new size and thus will change binded components font size.

maxim.prishchepa

p3c0 - tnx 4 answer, i'll try it.