def build_widgets(self, title_widgets):
if title_widgets is None:
if len(self.constraints) > 0:
cstr = " matching constraints"
else:
cstr = ""
title_widgets = Text("Machines" + cstr, align='center')
self.filter_edit_box = FilterBox(self.handle_filter_change)
self.machine_pile = Pile([title_widgets,
Divider(),
self.filter_edit_box] +
self.machine_widgets)
return self.machine_pile
class MachinesList(WidgetWrap):
"""A list of machines with configurable action buttons for each
machine.
actions - a list of ('label', function) pairs that wil be used to
create buttons for each machine. The machine will be passed to
the function as userdata.
constraints - a dict of constraints to filter the machines list.
only machines matching all the constraints will be shown.
show_hardware - bool, whether or not to show the hardware details
for each of the machines
title_widgets - A Text Widget to be used in place of the default
title.
show_assignments - bool, whether or not to show the assignments
for each of the machines.
"""
def __init__(self, controller, actions, constraints=None,
show_hardware=False, title_widgets=None,
show_assignments=True):
self.controller = controller
self.actions = actions
self.machine_widgets = []
if constraints is None:
self.constraints = {}
else:
self.constraints = constraints
self.show_hardware = show_hardware
self.show_assignments = show_assignments
self.filter_string = ""
w = self.build_widgets(title_widgets)
self.update()
super().__init__(w)
def selectable(self):
# overridden to ensure that we can arrow through the buttons
# shouldn't be necessary according to documented behavior of
# Pile & Columns, but discovered via trial & error.
return True
def build_widgets(self, title_widgets):
if title_widgets is None:
if len(self.constraints) > 0:
cstr = " matching constraints"
else:
cstr = ""
title_widgets = Text("Machines" + cstr, align='center')
self.filter_edit_box = FilterBox(self.handle_filter_change)
self.machine_pile = Pile([title_widgets,
Divider(),
self.filter_edit_box] +
self.machine_widgets)
return self.machine_pile
def handle_filter_change(self, edit_button, userdata):
self.filter_string = userdata
self.update()
def find_machine_widget(self, m):
return next((mw for mw in self.machine_widgets if
mw.machine.instance_id == m.instance_id), None)
def update(self):
machines = self.controller.machines()
for mw in self.machine_widgets:
machine = next((m for m in machines if
mw.machine.instance_id == m.instance_id), None)
if machine is None:
self.remove_machine(mw.machine)
n_satisfying_machines = len(machines)
def get_placement_filter_label(d):
s = ""
for atype, al in d.items():
s += " ".join(["{} {}".format(cc.charm_name,
cc.display_name)
for cc in al])
return s
for m in machines:
if not satisfies(m, self.constraints)[0]:
self.remove_machine(m)
n_satisfying_machines -= 1
continue
assignment_names = ""
ad = self.controller.assignments_for_machine(m)
assignment_names = get_placement_filter_label(ad)
dd = self.controller.deployments_for_machine(m)
deployment_names = get_placement_filter_label(dd)
filter_label = "{} {} {}".format(m.filter_label(),
assignment_names,
deployment_names)
if self.filter_string != "" and \
self.filter_string not in filter_label:
self.remove_machine(m)
continue
mw = self.find_machine_widget(m)
if mw is None:
mw = self.add_machine_widget(m)
mw.update()
self.filter_edit_box.set_info(len(self.machine_widgets),
n_satisfying_machines)
def add_machine_widget(self, machine):
mw = MachineWidget(machine, self.controller, self.actions,
self.show_hardware, self.show_assignments)
self.machine_widgets.append(mw)
options = self.machine_pile.options()
self.machine_pile.contents.append((mw, options))
self.machine_pile.contents.append((AttrMap(Padding(Divider('\u23bc'),
left=2, right=2),
'label'), options))
return mw
def remove_machine(self, machine):
mw = self.find_machine_widget(machine)
if mw is None:
return
self.machine_widgets.remove(mw)
mw_idx = 0
for w, opts in self.machine_pile.contents:
if w == mw:
break
mw_idx += 1
c = self.machine_pile.contents[:mw_idx] + \
self.machine_pile.contents[mw_idx + 2:]
self.machine_pile.contents = c
