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"""
User Interface Utility Functions for Kupfer
These helper functions can be called from plugins (are meant to serve this
purpose), but care should be taken to only call UI functions from the main
(default) thread.
"""
import gtk
import pango
from kupfer import pretty
from kupfer import config, version
from kupfer.ui import uievents
def _window_destroy_on_escape(widget, event):
"""
Callback function for Window's key press event, will destroy window
on escape
"""
if event.keyval == gtk.gdk.keyval_from_name("Escape"):
widget.destroy()
return True
def builder_get_objects_from_file(fname, attrs, autoconnect_to=None):
"""
Open @fname with gtk.Builder and yield objects named @attrs
@fname is sought in the data directories.
If @autoconnect_to is not None, signals are autoconnected to this object,
and a user_data object is passed as a namespace containing all @attrs
"""
builder = gtk.Builder()
builder.set_translation_domain(version.PACKAGE_NAME)
ui_file = config.get_data_file(fname)
builder.add_from_file(ui_file)
class Namespace (object):
pass
names = Namespace()
for attr in attrs:
obj = builder.get_object(attr)
setattr(names, attr, obj)
yield obj
if autoconnect_to:
builder.connect_signals(autoconnect_to, user_data=names)
def show_text_result(text, title=None, ctx=None):
"""
Show @text in a result window.
Use @title to set a window title
"""
class ResultWindowBehavior (object):
def on_text_result_window_key_press_event(self, widget, event, names):
return _window_destroy_on_escape(widget, event)
def on_close_button_clicked(self, widget, names):
names.text_result_window.window.destroy()
return True
def on_copy_button_clicked(self, widget, names):
clip = gtk.clipboard_get(gtk.gdk.SELECTION_CLIPBOARD)
textview = names.result_textview
buf = textview.get_buffer()
buf.select_range(*buf.get_bounds())
buf.copy_clipboard(clip)
window, textview = builder_get_objects_from_file("result.ui",
("text_result_window", "result_textview"),
autoconnect_to=ResultWindowBehavior())
# Set up text buffer
buf = gtk.TextBuffer()
buf.set_text(text)
monospace = gtk.TextTag("fixed")
monospace.set_property("family", "Monospace")
monospace.set_property("scale", pango.SCALE_LARGE)
beg, end = buf.get_bounds()
tag_table = buf.get_tag_table()
tag_table.add(monospace)
buf.apply_tag(monospace, beg, end)
textview.set_buffer(buf)
textview.set_wrap_mode(gtk.WRAP_NONE)
if title:
window.set_title(title)
if ctx:
ctx.environment.present_window(window)
window.show_all()
# Fix Sizing:
# We want to size the window so that the
# TextView is displayed without scrollbars
# initially, if it fits on screen.
oldwid, oldhei = textview.window.get_size()
winwid, winhei = window.get_size()
max_hsize, max_vsize = window.get_default_size()
wid, hei = textview.size_request()
textview.set_wrap_mode(gtk.WRAP_WORD)
vsize = int(min(hei + (winhei - oldhei) + 5, max_vsize))
hsize = int(min(wid + (winwid - oldwid) + 5, max_hsize))
window.resize(hsize, vsize)
if ctx:
ctx.environment.present_window(window)
else:
window.present_with_time(uievents.current_event_time())
def _wrap_paragraphs(text):
"""
Return @text with linewrapped paragraphs
"""
import textwrap
return u"\n\n".join(textwrap.fill(par) for par in text.split("\n\n"))
def show_large_type(text, ctx=None):
"""
Show @text, large, in a result window.
"""
import math
text = text.strip()
window = gtk.Window()
label = gtk.Label()
label.set_text(text)
def set_font_size(label, fontsize=48.0):
siz_attr = pango.AttrFontDesc(
pango.FontDescription (str(fontsize)), 0, -1)
attrs = pango.AttrList()
attrs.insert(siz_attr)
label.set_attributes(attrs)
label.show()
size = 72.0
set_font_size(label, size)
if ctx:
screen = ctx.environment.get_screen()
window.set_screen(screen)
else:
screen = gtk.gdk.screen_get_default()
maxwid = screen.get_width() - 50
maxhei = screen.get_height() - 100
wid, hei = label.size_request()
# If the text contains long lines, we try to
# hard-wrap the text
if ((wid > maxwid or hei > maxhei) and
any(len(L) > 100 for L in text.splitlines())):
label.set_text(_wrap_paragraphs(text))
wid, hei = label.size_request()
if wid > maxwid or hei > maxhei:
# Round size down to fit inside
wscale = maxwid * 1.0/wid
hscale = maxhei * 1.0/hei
set_font_size(label, math.floor(min(wscale, hscale)*size) or 1.0)
window.add(label)
window.set_position(gtk.WIN_POS_CENTER)
window.set_resizable(False)
window.set_decorated(False)
window.set_property("border-width", 10)
window.modify_bg(gtk.STATE_NORMAL, gtk.gdk.color_parse("black"))
label.modify_fg(gtk.STATE_NORMAL, gtk.gdk.color_parse("white"))
def _window_destroy(widget, event):
widget.destroy()
return True
window.connect("key-press-event", _window_destroy)
window.show_all()
if ctx:
ctx.environment.present_window(window)
else:
window.present_with_time(uievents.current_event_time())
SERVICE_NAME = "org.freedesktop.Notifications"
OBJECT_PATH = "/org/freedesktop/Notifications"
IFACE_NAME = "org.freedesktop.Notifications"
def _get_notification_iface():
"we will activate it over d-bus (start if not running)"
import dbus
try:
bus = dbus.SessionBus()
proxy_obj = bus.get_object(SERVICE_NAME, OBJECT_PATH)
except dbus.DBusException, e:
pretty.print_debug(__name__, e)
return
iface_obj = dbus.Interface(proxy_obj, IFACE_NAME)
return iface_obj
def show_notification(title, text="", icon_name="", nid=0):
"""
@nid: If not 0, the id of the notification to replace.
Returns the id of the displayed notification.
"""
notifications = _get_notification_iface()
if not notifications:
return None
rid = notifications.Notify("kupfer",
nid, icon_name, title, text, (), {}, -1)
return rid
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