# FontChooserWidget (Python)

Marta Maria Casetti
mmcasetti@gmail.com 2012
A widget to choose a font
Rafael Fontenelle
rafaelff@gnome.org 2013, 2018

# FontChooserWidget

A FontChooserWidget with a callback function.

# Code used to generate this example

from gi.repository import Gtk import sys

class MyWindow(Gtk.ApplicationWindow):

def __init__(self, app): Gtk.Window.__init__(self, title="FontChooserWidget", application=app)

# a font chooser self.font_chooser = Gtk.FontChooserWidget() # a default font self.font_chooser.set_font("Sans") # a text to preview the font self.font_chooser.set_preview_text( "This is an example of preview text!")

# connect signal from the font chooser to the callback function self.font_chooser.connect("notify::font", self.font_cb)

# add the font chooser to the window self.add(self.font_chooser)

# callback function: def font_cb(self, event, user_data): # print in the terminal print("You chose the font " + self.font_chooser.get_font())

class MyApplication(Gtk.Application):

def __init__(self): Gtk.Application.__init__(self)

def do_activate(self): win = MyWindow(self) win.show_all()

def do_startup(self): Gtk.Application.do_startup(self)

app = MyApplication() exit_status = app.run(sys.argv) sys.exit(exit_status)

# Useful methods for a FontChooserWidget

In line 16 the `"notify::font"` signal from the widget is connected to the callback function `font_cb()` using `widget.connect(signal, callback function)`. See for a more detailed explanation.

To set the font which is initially selected, use `set_font(font)` (where `font` is the font name) or `set_font_desc(font)` (where `font` is the PangoFontDescription).

To get the selected font use `get_font()` or `get_font_desc()`.

To change the text which is shown in the preview area, use `set_preview_text()`.

# Referências da API

In this sample we used the following:

GtkFontChooserWidget