Ticket #3428: testdpi.py

from gi.repository import WebKit
from gi.repository import Gtk
from gi.repository import Gdk
import cairo

WINDOW_WIDTH, WINDOW_HEIGHT = 400, 300

def _destroy_cb(widget, data=None):
    Gtk.main_quit()

# The following two callbacks are never called:

def _attributes_changed_cb(webview, viewport_attrs):
    print "changed!"
    print viewport_attrs

def _attributes_recompute_cb(webview, viewport_attrs):
    print "requested!"
    print viewport_attrs

window = Gtk.Window()
window.resize(WINDOW_WIDTH, WINDOW_HEIGHT)
window.connect("destroy", _destroy_cb)
window.show()

s = Gtk.ScrolledWindow()
window.add(s)
s.show()
v = WebKit.WebView()
v.connect('viewport-attributes-changed', _attributes_changed_cb)
v.connect('viewport-attributes-recompute-requested', _attributes_recompute_cb)
s.add(v)

# Trying to change enforce-96-dpi setting:

settings = v.get_settings()
print "Previous enforce-96-dpi:", settings.get_property('enforce-96-dpi')
settings.set_property('enforce-96-dpi', False)
print "New enforce-96-dpi:", settings.get_property('enforce-96-dpi')

# Trying to change some attributes:

attributes = v.get_viewport_attributes()
print "current dpi", attributes.props.device_dpi
attributes.props.device_dpi = 134  # XO device DPI is 134
print "current pixel ratio", attributes.props.device_pixel_ratio
attributes.props.device_width = 1200
attributes.props.device_height = 900
print "new dpi", attributes.props.device_dpi

v.load_uri('http://google.com')

# Changing the zoom level works:
#v.set_zoom_level(0.4)

v.show()

Gtk.main()