def nocache_bargraph_get_data(self, get_data_fn):
"""
Disable caching on this bargraph because get_data_fn needs
to be polled to get the latest data.
"""
self.render = nocache_widget_render_instance(self)
self._get_data = get_data_fn
def __init__(self, body):
"""
body -- a ListWalker-like object that contains
widgets to be displayed inside the list box
"""
if hasattr(body,'get_focus'):
self.body = body
else:
self.body = PollingListWalker(body)
try:
connect_signal(self.body, "modified", self._invalidate)
except NameError:
# our list walker has no modified signal so we must not
# cache our canvases because we don't know when our
# content has changed
self.render = nocache_widget_render_instance(self)
# offset_rows is the number of rows between the top of the view
# and the top of the focused item
self.offset_rows = 0
# inset_fraction is used when the focused widget is off the
# top of the view. it is the fraction of the widget cut off
# at the top. (numerator, denominator)
self.inset_fraction = (0,1)
# pref_col is the preferred column for the cursor when moving
# between widgets that use the cursor (edit boxes etc.)
self.pref_col = 'left'
# variable for delayed focus change used by set_focus
self.set_focus_pending = 'first selectable'
# variable for delayed valign change used by set_focus_valign
self.set_focus_valign_pending = None
def nocache_bargraph_get_data(self, get_data_fn):
"""
Disable caching on this bargraph because get_data_fn needs
to be polled to get the latest data.
"""
self.render = nocache_widget_render_instance(self)
self._get_data = get_data_fn
def __init__(self, body):
"""
body -- a ListWalker-like object that contains
widgets to be displayed inside the list box
"""
if hasattr(body, 'get_focus'):
self.body = body
else:
self.body = PollingListWalker(body)
try:
connect_signal(self.body, "modified", self._invalidate)
except NameError:
# our list walker has no modified signal so we must not
# cache our canvases because we don't know when our
# content has changed
self.render = nocache_widget_render_instance(self)
# offset_rows is the number of rows between the top of the view
# and the top of the focused item
self.offset_rows = 0
# inset_fraction is used when the focused widget is off the
# top of the view. it is the fraction of the widget cut off
# at the top. (numerator, denominator)
self.inset_fraction = (0, 1)
# pref_col is the preferred column for the cursor when moving
# between widgets that use the cursor (edit boxes etc.)
self.pref_col = 'left'
# variable for delayed focus change used by set_focus
self.set_focus_pending = 'first selectable'
# variable for delayed valign change used by set_focus_valign
self.set_focus_valign_pending = None
